diff --git a/client/client_test.go b/client/client_test.go
index b268cbf39202..3b8dbc828131 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -242,6 +242,7 @@ var allTests = []func(t *testing.T, sb integration.Sandbox){
 	testFileOpSymlink,
 	testMetadataOnlyLocal,
 	testGitResolveSourceMetadata,
+	testHTTPResolveSourceMetadata,
 }
 
 func TestIntegration(t *testing.T) {
@@ -12057,6 +12058,64 @@ func testGitResolveSourceMetadata(t *testing.T, sb integration.Sandbox) {
 	require.NoError(t, err)
 }
 
+func testHTTPResolveSourceMetadata(t *testing.T, sb integration.Sandbox) {
+	ctx := sb.Context()
+	c, err := New(ctx, sb.Address())
+	require.NoError(t, err)
+	defer c.Close()
+
+	modTime := time.Now().Add(-24 * time.Hour) // avoid falso positive with current time
+
+	resp := httpserver.Response{
+		Etag:         identity.NewID(),
+		Content:      []byte("content1"),
+		LastModified: &modTime,
+	}
+
+	resp2 := httpserver.Response{
+		Etag:               identity.NewID(),
+		Content:            []byte("content2"),
+		ContentDisposition: "attachment; filename=\"my img.jpg\"",
+	}
+
+	server := httpserver.NewTestServer(map[string]httpserver.Response{
+		"/foo": resp,
+		"/bar": resp2,
+	})
+	defer server.Close()
+
+	_, err = c.Build(ctx, SolveOpt{}, "test", func(ctx context.Context, c gateway.Client) (*gateway.Result, error) {
+		id := server.URL + "/foo"
+		md, err := c.ResolveSourceMetadata(ctx, &pb.SourceOp{
+			Identifier: id,
+		}, sourceresolver.Opt{})
+		if err != nil {
+			return nil, err
+		}
+		require.NotNil(t, md.HTTP)
+		require.Equal(t, digest.FromBytes(resp.Content), md.HTTP.Digest)
+		require.Equal(t, "foo", md.HTTP.Filename)
+		require.NotNil(t, md.HTTP.LastModified)
+		require.Equal(t, modTime.Unix(), md.HTTP.LastModified.Unix())
+		require.Equal(t, id, md.Op.Identifier)
+
+		id = server.URL + "/bar"
+		md, err = c.ResolveSourceMetadata(ctx, &pb.SourceOp{
+			Identifier: id,
+		}, sourceresolver.Opt{})
+		if err != nil {
+			return nil, err
+		}
+		require.NotNil(t, md.HTTP)
+		require.Equal(t, digest.FromBytes(resp2.Content), md.HTTP.Digest)
+		require.Equal(t, "my img.jpg", md.HTTP.Filename)
+		require.Nil(t, md.HTTP.LastModified)
+		require.Equal(t, id, md.Op.Identifier)
+		return nil, nil
+	}, nil)
+	require.NoError(t, err)
+}
+
 func runInDir(dir string, cmds ...string) error {
 	for _, args := range cmds {
 		var cmd *exec.Cmd
diff --git a/client/llb/sourceresolver/types.go b/client/llb/sourceresolver/types.go
index 1ff9a94fd77d..9be1dd994604 100644
--- a/client/llb/sourceresolver/types.go
+++ b/client/llb/sourceresolver/types.go
@@ -2,6 +2,7 @@ package sourceresolver
 
 import (
 	"context"
+	"time"
 
 	"github.com/moby/buildkit/solver/pb"
 	spb "github.com/moby/buildkit/sourcepolicy/pb"
@@ -34,6 +35,7 @@ type MetaResponse struct {
 
 	Image *ResolveImageResponse
 	Git   *ResolveGitResponse
+	HTTP  *ResolveHTTPResponse
 }
 
 type ResolveImageOpt struct {
@@ -51,6 +53,12 @@ type ResolveGitResponse struct {
 	CommitChecksum string
 }
 
+type ResolveHTTPResponse struct {
+	Digest       digest.Digest
+	Filename     string
+	LastModified *time.Time
+}
+
 type ResolveOCILayoutOpt struct {
 	Store ResolveImageConfigOptStore
 }
diff --git a/frontend/gateway/gateway.go b/frontend/gateway/gateway.go
index 7581f48c0e03..0c2157c8fefa 100644
--- a/frontend/gateway/gateway.go
+++ b/frontend/gateway/gateway.go
@@ -19,6 +19,7 @@ import (
 	"github.com/containerd/containerd/v2/core/mount"
 	"github.com/containerd/containerd/v2/defaults"
 	"github.com/distribution/reference"
+	"github.com/golang/protobuf/ptypes/timestamp"
 	apitypes "github.com/moby/buildkit/api/types"
 	"github.com/moby/buildkit/cache"
 	cacheutil "github.com/moby/buildkit/cache/util"
@@ -657,6 +658,19 @@ func (lbf *llbBridgeForwarder) ResolveSourceMeta(ctx context.Context, req *pb.Re
 			CommitChecksum: resp.Git.CommitChecksum,
 		}
 	}
+	if resp.HTTP != nil {
+		var lastModified *timestamp.Timestamp
+		if resp.HTTP.LastModified != nil {
+			lastModified = &timestamp.Timestamp{
+				Seconds: resp.HTTP.LastModified.Unix(),
+			}
+		}
+		r.HTTP = &pb.ResolveSourceHTTPResponse{
+			Checksum:     resp.HTTP.Digest.String(),
+			Filename:     resp.HTTP.Filename,
+			LastModified: lastModified,
+		}
+	}
 	return r, nil
 }
 
diff --git a/frontend/gateway/grpcclient/client.go b/frontend/gateway/grpcclient/client.go
index cdb291033957..d4bdd88650f4 100644
--- a/frontend/gateway/grpcclient/client.go
+++ b/frontend/gateway/grpcclient/client.go
@@ -535,6 +535,21 @@ func (c *grpcClient) ResolveSourceMetadata(ctx context.Context, op *opspb.Source
 			CommitChecksum: resp.Git.CommitChecksum,
 		}
 	}
+	if resp.HTTP != nil {
+		dgst, err := digest.Parse(resp.HTTP.Checksum)
+		if err != nil {
+			return nil, errors.Wrapf(err, "invalid http checksum digest %q", resp.HTTP.Checksum)
+		}
+
+		r.HTTP = &sourceresolver.ResolveHTTPResponse{
+			Digest:   dgst,
+			Filename: resp.HTTP.Filename,
+		}
+		if resp.HTTP.LastModified != nil {
+			tm := resp.HTTP.LastModified.AsTime()
+			r.HTTP.LastModified = &tm
+		}
+	}
 	return r, nil
 }
 
diff --git a/frontend/gateway/pb/gateway.pb.go b/frontend/gateway/pb/gateway.pb.go
index 04239ddf7d7b..710aca2d569f 100644
--- a/frontend/gateway/pb/gateway.pb.go
+++ b/frontend/gateway/pb/gateway.pb.go
@@ -7,6 +7,7 @@
 package moby_buildkit_v1_frontend
 
 import (
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
 	types1 "github.com/moby/buildkit/api/types"
 	pb "github.com/moby/buildkit/solver/pb"
 	pb1 "github.com/moby/buildkit/sourcepolicy/pb"
@@ -988,6 +989,7 @@ type ResolveSourceMetaResponse struct {
 	Source        *pb.SourceOp                `protobuf:"bytes,1,opt,name=Source,proto3" json:"Source,omitempty"`
 	Image         *ResolveSourceImageResponse `protobuf:"bytes,2,opt,name=Image,proto3" json:"Image,omitempty"`
 	Git           *ResolveSourceGitResponse   `protobuf:"bytes,3,opt,name=Git,proto3" json:"Git,omitempty"`
+	HTTP          *ResolveSourceHTTPResponse  `protobuf:"bytes,4,opt,name=HTTP,proto3" json:"HTTP,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1043,6 +1045,13 @@ func (x *ResolveSourceMetaResponse) GetGit() *ResolveSourceGitResponse {
 	return nil
 }
 
+func (x *ResolveSourceMetaResponse) GetHTTP() *ResolveSourceHTTPResponse {
+	if x != nil {
+		return x.HTTP
+	}
+	return nil
+}
+
 type ResolveSourceImageResponse struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Digest        string                 `protobuf:"bytes,1,opt,name=Digest,proto3" json:"Digest,omitempty"`
@@ -1155,6 +1164,66 @@ func (x *ResolveSourceGitResponse) GetCommitChecksum() string {
 	return ""
 }
 
+type ResolveSourceHTTPResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Checksum      string                 `protobuf:"bytes,1,opt,name=Checksum,proto3" json:"Checksum,omitempty"`
+	Filename      string                 `protobuf:"bytes,2,opt,name=Filename,proto3" json:"Filename,omitempty"`
+	LastModified  *timestamp.Timestamp   `protobuf:"bytes,3,opt,name=LastModified,proto3" json:"LastModified,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ResolveSourceHTTPResponse) Reset() {
+	*x = ResolveSourceHTTPResponse{}
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[17]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ResolveSourceHTTPResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ResolveSourceHTTPResponse) ProtoMessage() {}
+
+func (x *ResolveSourceHTTPResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[17]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ResolveSourceHTTPResponse.ProtoReflect.Descriptor instead.
+func (*ResolveSourceHTTPResponse) Descriptor() ([]byte, []int) {
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{17}
+}
+
+func (x *ResolveSourceHTTPResponse) GetChecksum() string {
+	if x != nil {
+		return x.Checksum
+	}
+	return ""
+}
+
+func (x *ResolveSourceHTTPResponse) GetFilename() string {
+	if x != nil {
+		return x.Filename
+	}
+	return ""
+}
+
+func (x *ResolveSourceHTTPResponse) GetLastModified() *timestamp.Timestamp {
+	if x != nil {
+		return x.LastModified
+	}
+	return nil
+}
+
 type SolveRequest struct {
 	state       protoimpl.MessageState `protogen:"open.v1"`
 	Definition  *pb.Definition         `protobuf:"bytes,1,opt,name=Definition,proto3" json:"Definition,omitempty"`
@@ -1179,7 +1248,7 @@ type SolveRequest struct {
 
 func (x *SolveRequest) Reset() {
 	*x = SolveRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[17]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[18]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1191,7 +1260,7 @@ func (x *SolveRequest) String() string {
 func (*SolveRequest) ProtoMessage() {}
 
 func (x *SolveRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[17]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[18]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1204,7 +1273,7 @@ func (x *SolveRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SolveRequest.ProtoReflect.Descriptor instead.
 func (*SolveRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{17}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *SolveRequest) GetDefinition() *pb.Definition {
@@ -1295,7 +1364,7 @@ type CacheOptionsEntry struct {
 
 func (x *CacheOptionsEntry) Reset() {
 	*x = CacheOptionsEntry{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[18]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[19]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1307,7 +1376,7 @@ func (x *CacheOptionsEntry) String() string {
 func (*CacheOptionsEntry) ProtoMessage() {}
 
 func (x *CacheOptionsEntry) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[18]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[19]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1320,7 +1389,7 @@ func (x *CacheOptionsEntry) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CacheOptionsEntry.ProtoReflect.Descriptor instead.
 func (*CacheOptionsEntry) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{18}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *CacheOptionsEntry) GetType() string {
@@ -1349,7 +1418,7 @@ type SolveResponse struct {
 
 func (x *SolveResponse) Reset() {
 	*x = SolveResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[19]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[20]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1361,7 +1430,7 @@ func (x *SolveResponse) String() string {
 func (*SolveResponse) ProtoMessage() {}
 
 func (x *SolveResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[19]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[20]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1374,7 +1443,7 @@ func (x *SolveResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SolveResponse.ProtoReflect.Descriptor instead.
 func (*SolveResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{19}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *SolveResponse) GetRef() string {
@@ -1402,7 +1471,7 @@ type ReadFileRequest struct {
 
 func (x *ReadFileRequest) Reset() {
 	*x = ReadFileRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[20]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[21]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1414,7 +1483,7 @@ func (x *ReadFileRequest) String() string {
 func (*ReadFileRequest) ProtoMessage() {}
 
 func (x *ReadFileRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[20]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[21]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1427,7 +1496,7 @@ func (x *ReadFileRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReadFileRequest.ProtoReflect.Descriptor instead.
 func (*ReadFileRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{20}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *ReadFileRequest) GetRef() string {
@@ -1461,7 +1530,7 @@ type FileRange struct {
 
 func (x *FileRange) Reset() {
 	*x = FileRange{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[21]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[22]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1473,7 +1542,7 @@ func (x *FileRange) String() string {
 func (*FileRange) ProtoMessage() {}
 
 func (x *FileRange) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[21]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[22]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1486,7 +1555,7 @@ func (x *FileRange) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FileRange.ProtoReflect.Descriptor instead.
 func (*FileRange) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{21}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{22}
 }
 
 func (x *FileRange) GetOffset() int64 {
@@ -1512,7 +1581,7 @@ type ReadFileResponse struct {
 
 func (x *ReadFileResponse) Reset() {
 	*x = ReadFileResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[22]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[23]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1524,7 +1593,7 @@ func (x *ReadFileResponse) String() string {
 func (*ReadFileResponse) ProtoMessage() {}
 
 func (x *ReadFileResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[22]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[23]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1537,7 +1606,7 @@ func (x *ReadFileResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReadFileResponse.ProtoReflect.Descriptor instead.
 func (*ReadFileResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{22}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *ReadFileResponse) GetData() []byte {
@@ -1558,7 +1627,7 @@ type ReadDirRequest struct {
 
 func (x *ReadDirRequest) Reset() {
 	*x = ReadDirRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[23]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[24]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1570,7 +1639,7 @@ func (x *ReadDirRequest) String() string {
 func (*ReadDirRequest) ProtoMessage() {}
 
 func (x *ReadDirRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[23]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[24]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1583,7 +1652,7 @@ func (x *ReadDirRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReadDirRequest.ProtoReflect.Descriptor instead.
 func (*ReadDirRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{23}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{24}
 }
 
 func (x *ReadDirRequest) GetRef() string {
@@ -1616,7 +1685,7 @@ type ReadDirResponse struct {
 
 func (x *ReadDirResponse) Reset() {
 	*x = ReadDirResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[24]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[25]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1628,7 +1697,7 @@ func (x *ReadDirResponse) String() string {
 func (*ReadDirResponse) ProtoMessage() {}
 
 func (x *ReadDirResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[24]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[25]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1641,7 +1710,7 @@ func (x *ReadDirResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReadDirResponse.ProtoReflect.Descriptor instead.
 func (*ReadDirResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{24}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{25}
 }
 
 func (x *ReadDirResponse) GetEntries() []*types.Stat {
@@ -1661,7 +1730,7 @@ type StatFileRequest struct {
 
 func (x *StatFileRequest) Reset() {
 	*x = StatFileRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[25]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[26]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1673,7 +1742,7 @@ func (x *StatFileRequest) String() string {
 func (*StatFileRequest) ProtoMessage() {}
 
 func (x *StatFileRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[25]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[26]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1686,7 +1755,7 @@ func (x *StatFileRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StatFileRequest.ProtoReflect.Descriptor instead.
 func (*StatFileRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{25}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{26}
 }
 
 func (x *StatFileRequest) GetRef() string {
@@ -1712,7 +1781,7 @@ type StatFileResponse struct {
 
 func (x *StatFileResponse) Reset() {
 	*x = StatFileResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[26]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[27]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1724,7 +1793,7 @@ func (x *StatFileResponse) String() string {
 func (*StatFileResponse) ProtoMessage() {}
 
 func (x *StatFileResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[26]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[27]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1737,7 +1806,7 @@ func (x *StatFileResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StatFileResponse.ProtoReflect.Descriptor instead.
 func (*StatFileResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{26}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{27}
 }
 
 func (x *StatFileResponse) GetStat() *types.Stat {
@@ -1756,7 +1825,7 @@ type EvaluateRequest struct {
 
 func (x *EvaluateRequest) Reset() {
 	*x = EvaluateRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[27]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[28]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1768,7 +1837,7 @@ func (x *EvaluateRequest) String() string {
 func (*EvaluateRequest) ProtoMessage() {}
 
 func (x *EvaluateRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[27]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[28]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1781,7 +1850,7 @@ func (x *EvaluateRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use EvaluateRequest.ProtoReflect.Descriptor instead.
 func (*EvaluateRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{27}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{28}
 }
 
 func (x *EvaluateRequest) GetRef() string {
@@ -1799,7 +1868,7 @@ type EvaluateResponse struct {
 
 func (x *EvaluateResponse) Reset() {
 	*x = EvaluateResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[28]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[29]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1811,7 +1880,7 @@ func (x *EvaluateResponse) String() string {
 func (*EvaluateResponse) ProtoMessage() {}
 
 func (x *EvaluateResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[28]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[29]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1824,7 +1893,7 @@ func (x *EvaluateResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use EvaluateResponse.ProtoReflect.Descriptor instead.
 func (*EvaluateResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{28}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{29}
 }
 
 type PingRequest struct {
@@ -1835,7 +1904,7 @@ type PingRequest struct {
 
 func (x *PingRequest) Reset() {
 	*x = PingRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[29]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[30]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1847,7 +1916,7 @@ func (x *PingRequest) String() string {
 func (*PingRequest) ProtoMessage() {}
 
 func (x *PingRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[29]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[30]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1860,7 +1929,7 @@ func (x *PingRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PingRequest.ProtoReflect.Descriptor instead.
 func (*PingRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{29}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{30}
 }
 
 type PongResponse struct {
@@ -1874,7 +1943,7 @@ type PongResponse struct {
 
 func (x *PongResponse) Reset() {
 	*x = PongResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[30]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[31]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1886,7 +1955,7 @@ func (x *PongResponse) String() string {
 func (*PongResponse) ProtoMessage() {}
 
 func (x *PongResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[30]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[31]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1899,7 +1968,7 @@ func (x *PongResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PongResponse.ProtoReflect.Descriptor instead.
 func (*PongResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{30}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{31}
 }
 
 func (x *PongResponse) GetFrontendAPICaps() []*pb2.APICap {
@@ -1938,7 +2007,7 @@ type WarnRequest struct {
 
 func (x *WarnRequest) Reset() {
 	*x = WarnRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[31]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[32]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1950,7 +2019,7 @@ func (x *WarnRequest) String() string {
 func (*WarnRequest) ProtoMessage() {}
 
 func (x *WarnRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[31]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[32]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1963,7 +2032,7 @@ func (x *WarnRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use WarnRequest.ProtoReflect.Descriptor instead.
 func (*WarnRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{31}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{32}
 }
 
 func (x *WarnRequest) GetDigest() string {
@@ -2023,7 +2092,7 @@ type WarnResponse struct {
 
 func (x *WarnResponse) Reset() {
 	*x = WarnResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[32]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[33]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2035,7 +2104,7 @@ func (x *WarnResponse) String() string {
 func (*WarnResponse) ProtoMessage() {}
 
 func (x *WarnResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[32]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[33]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2048,7 +2117,7 @@ func (x *WarnResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use WarnResponse.ProtoReflect.Descriptor instead.
 func (*WarnResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{32}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{33}
 }
 
 type NewContainerRequest struct {
@@ -2067,7 +2136,7 @@ type NewContainerRequest struct {
 
 func (x *NewContainerRequest) Reset() {
 	*x = NewContainerRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[33]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[34]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2079,7 +2148,7 @@ func (x *NewContainerRequest) String() string {
 func (*NewContainerRequest) ProtoMessage() {}
 
 func (x *NewContainerRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[33]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[34]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2092,7 +2161,7 @@ func (x *NewContainerRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use NewContainerRequest.ProtoReflect.Descriptor instead.
 func (*NewContainerRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{33}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{34}
 }
 
 func (x *NewContainerRequest) GetContainerID() string {
@@ -2152,7 +2221,7 @@ type NewContainerResponse struct {
 
 func (x *NewContainerResponse) Reset() {
 	*x = NewContainerResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[34]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[35]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2164,7 +2233,7 @@ func (x *NewContainerResponse) String() string {
 func (*NewContainerResponse) ProtoMessage() {}
 
 func (x *NewContainerResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[34]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[35]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2177,7 +2246,7 @@ func (x *NewContainerResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use NewContainerResponse.ProtoReflect.Descriptor instead.
 func (*NewContainerResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{34}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{35}
 }
 
 type ReleaseContainerRequest struct {
@@ -2189,7 +2258,7 @@ type ReleaseContainerRequest struct {
 
 func (x *ReleaseContainerRequest) Reset() {
 	*x = ReleaseContainerRequest{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[35]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[36]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2201,7 +2270,7 @@ func (x *ReleaseContainerRequest) String() string {
 func (*ReleaseContainerRequest) ProtoMessage() {}
 
 func (x *ReleaseContainerRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[35]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[36]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2214,7 +2283,7 @@ func (x *ReleaseContainerRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReleaseContainerRequest.ProtoReflect.Descriptor instead.
 func (*ReleaseContainerRequest) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{35}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{36}
 }
 
 func (x *ReleaseContainerRequest) GetContainerID() string {
@@ -2232,7 +2301,7 @@ type ReleaseContainerResponse struct {
 
 func (x *ReleaseContainerResponse) Reset() {
 	*x = ReleaseContainerResponse{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[36]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[37]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2244,7 +2313,7 @@ func (x *ReleaseContainerResponse) String() string {
 func (*ReleaseContainerResponse) ProtoMessage() {}
 
 func (x *ReleaseContainerResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[36]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[37]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2257,7 +2326,7 @@ func (x *ReleaseContainerResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReleaseContainerResponse.ProtoReflect.Descriptor instead.
 func (*ReleaseContainerResponse) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{36}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{37}
 }
 
 type ExecMessage struct {
@@ -2279,7 +2348,7 @@ type ExecMessage struct {
 
 func (x *ExecMessage) Reset() {
 	*x = ExecMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[37]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[38]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2291,7 +2360,7 @@ func (x *ExecMessage) String() string {
 func (*ExecMessage) ProtoMessage() {}
 
 func (x *ExecMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[37]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[38]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2304,7 +2373,7 @@ func (x *ExecMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExecMessage.ProtoReflect.Descriptor instead.
 func (*ExecMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{37}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{38}
 }
 
 func (x *ExecMessage) GetProcessID() string {
@@ -2456,7 +2525,7 @@ type InitMessage struct {
 
 func (x *InitMessage) Reset() {
 	*x = InitMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[38]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[39]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2468,7 +2537,7 @@ func (x *InitMessage) String() string {
 func (*InitMessage) ProtoMessage() {}
 
 func (x *InitMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[38]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[39]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2481,7 +2550,7 @@ func (x *InitMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InitMessage.ProtoReflect.Descriptor instead.
 func (*InitMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{38}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{39}
 }
 
 func (x *InitMessage) GetContainerID() string {
@@ -2536,7 +2605,7 @@ type ExitMessage struct {
 
 func (x *ExitMessage) Reset() {
 	*x = ExitMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[39]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[40]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2548,7 +2617,7 @@ func (x *ExitMessage) String() string {
 func (*ExitMessage) ProtoMessage() {}
 
 func (x *ExitMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[39]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[40]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2561,7 +2630,7 @@ func (x *ExitMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExitMessage.ProtoReflect.Descriptor instead.
 func (*ExitMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{39}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{40}
 }
 
 func (x *ExitMessage) GetCode() uint32 {
@@ -2586,7 +2655,7 @@ type StartedMessage struct {
 
 func (x *StartedMessage) Reset() {
 	*x = StartedMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[40]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[41]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2598,7 +2667,7 @@ func (x *StartedMessage) String() string {
 func (*StartedMessage) ProtoMessage() {}
 
 func (x *StartedMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[40]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[41]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2611,7 +2680,7 @@ func (x *StartedMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StartedMessage.ProtoReflect.Descriptor instead.
 func (*StartedMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{40}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{41}
 }
 
 type DoneMessage struct {
@@ -2622,7 +2691,7 @@ type DoneMessage struct {
 
 func (x *DoneMessage) Reset() {
 	*x = DoneMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[41]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[42]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2634,7 +2703,7 @@ func (x *DoneMessage) String() string {
 func (*DoneMessage) ProtoMessage() {}
 
 func (x *DoneMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[41]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[42]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2647,7 +2716,7 @@ func (x *DoneMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DoneMessage.ProtoReflect.Descriptor instead.
 func (*DoneMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{41}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{42}
 }
 
 type FdMessage struct {
@@ -2661,7 +2730,7 @@ type FdMessage struct {
 
 func (x *FdMessage) Reset() {
 	*x = FdMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[42]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[43]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2673,7 +2742,7 @@ func (x *FdMessage) String() string {
 func (*FdMessage) ProtoMessage() {}
 
 func (x *FdMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[42]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[43]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2686,7 +2755,7 @@ func (x *FdMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FdMessage.ProtoReflect.Descriptor instead.
 func (*FdMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{42}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{43}
 }
 
 func (x *FdMessage) GetFd() uint32 {
@@ -2720,7 +2789,7 @@ type ResizeMessage struct {
 
 func (x *ResizeMessage) Reset() {
 	*x = ResizeMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[43]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[44]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2732,7 +2801,7 @@ func (x *ResizeMessage) String() string {
 func (*ResizeMessage) ProtoMessage() {}
 
 func (x *ResizeMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[43]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[44]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2745,7 +2814,7 @@ func (x *ResizeMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ResizeMessage.ProtoReflect.Descriptor instead.
 func (*ResizeMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{43}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{44}
 }
 
 func (x *ResizeMessage) GetRows() uint32 {
@@ -2773,7 +2842,7 @@ type SignalMessage struct {
 
 func (x *SignalMessage) Reset() {
 	*x = SignalMessage{}
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[44]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[45]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -2785,7 +2854,7 @@ func (x *SignalMessage) String() string {
 func (*SignalMessage) ProtoMessage() {}
 
 func (x *SignalMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[44]
+	mi := &file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[45]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2798,7 +2867,7 @@ func (x *SignalMessage) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SignalMessage.ProtoReflect.Descriptor instead.
 func (*SignalMessage) Descriptor() ([]byte, []int) {
-	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{44}
+	return file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP(), []int{45}
 }
 
 func (x *SignalMessage) GetName() string {
@@ -2812,7 +2881,7 @@ var File_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto protoreflect
 
 const file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDesc = "" +
 	"\n" +
-	":github.com/moby/buildkit/frontend/gateway/pb/gateway.proto\x12\x19moby.buildkit.v1.frontend\x1a/github.com/moby/buildkit/api/types/worker.proto\x1a,github.com/moby/buildkit/solver/pb/ops.proto\x1a5github.com/moby/buildkit/sourcepolicy/pb/policy.proto\x1a3github.com/moby/buildkit/util/apicaps/pb/caps.proto\x1a-github.zerozr99.workers.dev/tonistiigi/fsutil/types/stat.proto\x1a\x17google/rpc/status.proto\"\xcb\x04\n" +
+	":github.com/moby/buildkit/frontend/gateway/pb/gateway.proto\x12\x19moby.buildkit.v1.frontend\x1a/github.com/moby/buildkit/api/types/worker.proto\x1a,github.com/moby/buildkit/solver/pb/ops.proto\x1a5github.com/moby/buildkit/sourcepolicy/pb/policy.proto\x1a3github.com/moby/buildkit/util/apicaps/pb/caps.proto\x1a-github.zerozr99.workers.dev/tonistiigi/fsutil/types/stat.proto\x1a\x1fgoogle/protobuf/timestamp.proto\x1a\x17google/rpc/status.proto\"\xcb\x04\n" +
 	"\x06Result\x12&\n" +
 	"\rrefDeprecated\x18\x01 \x01(\tH\x00R\rrefDeprecated\x12U\n" +
 	"\x0erefsDeprecated\x18\x02 \x01(\v2+.moby.buildkit.v1.frontend.RefMapDeprecatedH\x00R\x0erefsDeprecated\x122\n" +
@@ -2885,18 +2954,23 @@ const file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDesc =
 	"\bPlatform\x18\x02 \x01(\v2\f.pb.PlatformR\bPlatform\x12\x18\n" +
 	"\aLogName\x18\x03 \x01(\tR\aLogName\x12 \n" +
 	"\vResolveMode\x18\x04 \x01(\tR\vResolveMode\x12M\n" +
-	"\x0eSourcePolicies\x18\b \x03(\v2%.moby.buildkit.v1.sourcepolicy.PolicyR\x0eSourcePolicies\"\xd5\x01\n" +
+	"\x0eSourcePolicies\x18\b \x03(\v2%.moby.buildkit.v1.sourcepolicy.PolicyR\x0eSourcePolicies\"\x9f\x02\n" +
 	"\x19ResolveSourceMetaResponse\x12$\n" +
 	"\x06Source\x18\x01 \x01(\v2\f.pb.SourceOpR\x06Source\x12K\n" +
 	"\x05Image\x18\x02 \x01(\v25.moby.buildkit.v1.frontend.ResolveSourceImageResponseR\x05Image\x12E\n" +
-	"\x03Git\x18\x03 \x01(\v23.moby.buildkit.v1.frontend.ResolveSourceGitResponseR\x03Git\"L\n" +
+	"\x03Git\x18\x03 \x01(\v23.moby.buildkit.v1.frontend.ResolveSourceGitResponseR\x03Git\x12H\n" +
+	"\x04HTTP\x18\x04 \x01(\v24.moby.buildkit.v1.frontend.ResolveSourceHTTPResponseR\x04HTTP\"L\n" +
 	"\x1aResolveSourceImageResponse\x12\x16\n" +
 	"\x06Digest\x18\x01 \x01(\tR\x06Digest\x12\x16\n" +
 	"\x06Config\x18\x02 \x01(\fR\x06Config\"p\n" +
 	"\x18ResolveSourceGitResponse\x12\x1a\n" +
 	"\bChecksum\x18\x01 \x01(\tR\bChecksum\x12\x10\n" +
 	"\x03Ref\x18\x02 \x01(\tR\x03Ref\x12&\n" +
-	"\x0eCommitChecksum\x18\x03 \x01(\tR\x0eCommitChecksum\"\x85\x06\n" +
+	"\x0eCommitChecksum\x18\x03 \x01(\tR\x0eCommitChecksum\"\x93\x01\n" +
+	"\x19ResolveSourceHTTPResponse\x12\x1a\n" +
+	"\bChecksum\x18\x01 \x01(\tR\bChecksum\x12\x1a\n" +
+	"\bFilename\x18\x02 \x01(\tR\bFilename\x12>\n" +
+	"\fLastModified\x18\x03 \x01(\v2\x1a.google.protobuf.TimestampR\fLastModified\"\x85\x06\n" +
 	"\fSolveRequest\x12.\n" +
 	"\n" +
 	"Definition\x18\x01 \x01(\v2\x0e.pb.DefinitionR\n" +
@@ -3048,7 +3122,7 @@ func file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDescGZIP
 }
 
 var file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes = make([]protoimpl.MessageInfo, 54)
+var file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes = make([]protoimpl.MessageInfo, 55)
 var file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_goTypes = []any{
 	(AttestationKind)(0),               // 0: moby.buildkit.v1.frontend.AttestationKind
 	(InTotoSubjectKind)(0),             // 1: moby.buildkit.v1.frontend.InTotoSubjectKind
@@ -3069,155 +3143,159 @@ var file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_goTypes = []
 	(*ResolveSourceMetaResponse)(nil),  // 16: moby.buildkit.v1.frontend.ResolveSourceMetaResponse
 	(*ResolveSourceImageResponse)(nil), // 17: moby.buildkit.v1.frontend.ResolveSourceImageResponse
 	(*ResolveSourceGitResponse)(nil),   // 18: moby.buildkit.v1.frontend.ResolveSourceGitResponse
-	(*SolveRequest)(nil),               // 19: moby.buildkit.v1.frontend.SolveRequest
-	(*CacheOptionsEntry)(nil),          // 20: moby.buildkit.v1.frontend.CacheOptionsEntry
-	(*SolveResponse)(nil),              // 21: moby.buildkit.v1.frontend.SolveResponse
-	(*ReadFileRequest)(nil),            // 22: moby.buildkit.v1.frontend.ReadFileRequest
-	(*FileRange)(nil),                  // 23: moby.buildkit.v1.frontend.FileRange
-	(*ReadFileResponse)(nil),           // 24: moby.buildkit.v1.frontend.ReadFileResponse
-	(*ReadDirRequest)(nil),             // 25: moby.buildkit.v1.frontend.ReadDirRequest
-	(*ReadDirResponse)(nil),            // 26: moby.buildkit.v1.frontend.ReadDirResponse
-	(*StatFileRequest)(nil),            // 27: moby.buildkit.v1.frontend.StatFileRequest
-	(*StatFileResponse)(nil),           // 28: moby.buildkit.v1.frontend.StatFileResponse
-	(*EvaluateRequest)(nil),            // 29: moby.buildkit.v1.frontend.EvaluateRequest
-	(*EvaluateResponse)(nil),           // 30: moby.buildkit.v1.frontend.EvaluateResponse
-	(*PingRequest)(nil),                // 31: moby.buildkit.v1.frontend.PingRequest
-	(*PongResponse)(nil),               // 32: moby.buildkit.v1.frontend.PongResponse
-	(*WarnRequest)(nil),                // 33: moby.buildkit.v1.frontend.WarnRequest
-	(*WarnResponse)(nil),               // 34: moby.buildkit.v1.frontend.WarnResponse
-	(*NewContainerRequest)(nil),        // 35: moby.buildkit.v1.frontend.NewContainerRequest
-	(*NewContainerResponse)(nil),       // 36: moby.buildkit.v1.frontend.NewContainerResponse
-	(*ReleaseContainerRequest)(nil),    // 37: moby.buildkit.v1.frontend.ReleaseContainerRequest
-	(*ReleaseContainerResponse)(nil),   // 38: moby.buildkit.v1.frontend.ReleaseContainerResponse
-	(*ExecMessage)(nil),                // 39: moby.buildkit.v1.frontend.ExecMessage
-	(*InitMessage)(nil),                // 40: moby.buildkit.v1.frontend.InitMessage
-	(*ExitMessage)(nil),                // 41: moby.buildkit.v1.frontend.ExitMessage
-	(*StartedMessage)(nil),             // 42: moby.buildkit.v1.frontend.StartedMessage
-	(*DoneMessage)(nil),                // 43: moby.buildkit.v1.frontend.DoneMessage
-	(*FdMessage)(nil),                  // 44: moby.buildkit.v1.frontend.FdMessage
-	(*ResizeMessage)(nil),              // 45: moby.buildkit.v1.frontend.ResizeMessage
-	(*SignalMessage)(nil),              // 46: moby.buildkit.v1.frontend.SignalMessage
-	nil,                                // 47: moby.buildkit.v1.frontend.Result.MetadataEntry
-	nil,                                // 48: moby.buildkit.v1.frontend.Result.AttestationsEntry
-	nil,                                // 49: moby.buildkit.v1.frontend.RefMapDeprecated.RefsEntry
-	nil,                                // 50: moby.buildkit.v1.frontend.RefMap.RefsEntry
-	nil,                                // 51: moby.buildkit.v1.frontend.Attestation.MetadataEntry
-	nil,                                // 52: moby.buildkit.v1.frontend.InputsResponse.DefinitionsEntry
-	nil,                                // 53: moby.buildkit.v1.frontend.SolveRequest.FrontendOptEntry
-	nil,                                // 54: moby.buildkit.v1.frontend.SolveRequest.FrontendInputsEntry
-	nil,                                // 55: moby.buildkit.v1.frontend.CacheOptionsEntry.AttrsEntry
-	(*pb.Definition)(nil),              // 56: pb.Definition
-	(*status.Status)(nil),              // 57: google.rpc.Status
-	(*pb.Platform)(nil),                // 58: pb.Platform
-	(*pb1.Policy)(nil),                 // 59: moby.buildkit.v1.sourcepolicy.Policy
-	(*pb.SourceOp)(nil),                // 60: pb.SourceOp
-	(*types.Stat)(nil),                 // 61: fsutil.types.Stat
-	(*pb2.APICap)(nil),                 // 62: moby.buildkit.v1.apicaps.APICap
-	(*types1.WorkerRecord)(nil),        // 63: moby.buildkit.v1.types.WorkerRecord
-	(*pb.SourceInfo)(nil),              // 64: pb.SourceInfo
-	(*pb.Range)(nil),                   // 65: pb.Range
-	(*pb.Mount)(nil),                   // 66: pb.Mount
-	(pb.NetMode)(0),                    // 67: pb.NetMode
-	(*pb.WorkerConstraints)(nil),       // 68: pb.WorkerConstraints
-	(*pb.HostIP)(nil),                  // 69: pb.HostIP
-	(*pb.Meta)(nil),                    // 70: pb.Meta
-	(pb.SecurityMode)(0),               // 71: pb.SecurityMode
-	(*pb.SecretEnv)(nil),               // 72: pb.SecretEnv
+	(*ResolveSourceHTTPResponse)(nil),  // 19: moby.buildkit.v1.frontend.ResolveSourceHTTPResponse
+	(*SolveRequest)(nil),               // 20: moby.buildkit.v1.frontend.SolveRequest
+	(*CacheOptionsEntry)(nil),          // 21: moby.buildkit.v1.frontend.CacheOptionsEntry
+	(*SolveResponse)(nil),              // 22: moby.buildkit.v1.frontend.SolveResponse
+	(*ReadFileRequest)(nil),            // 23: moby.buildkit.v1.frontend.ReadFileRequest
+	(*FileRange)(nil),                  // 24: moby.buildkit.v1.frontend.FileRange
+	(*ReadFileResponse)(nil),           // 25: moby.buildkit.v1.frontend.ReadFileResponse
+	(*ReadDirRequest)(nil),             // 26: moby.buildkit.v1.frontend.ReadDirRequest
+	(*ReadDirResponse)(nil),            // 27: moby.buildkit.v1.frontend.ReadDirResponse
+	(*StatFileRequest)(nil),            // 28: moby.buildkit.v1.frontend.StatFileRequest
+	(*StatFileResponse)(nil),           // 29: moby.buildkit.v1.frontend.StatFileResponse
+	(*EvaluateRequest)(nil),            // 30: moby.buildkit.v1.frontend.EvaluateRequest
+	(*EvaluateResponse)(nil),           // 31: moby.buildkit.v1.frontend.EvaluateResponse
+	(*PingRequest)(nil),                // 32: moby.buildkit.v1.frontend.PingRequest
+	(*PongResponse)(nil),               // 33: moby.buildkit.v1.frontend.PongResponse
+	(*WarnRequest)(nil),                // 34: moby.buildkit.v1.frontend.WarnRequest
+	(*WarnResponse)(nil),               // 35: moby.buildkit.v1.frontend.WarnResponse
+	(*NewContainerRequest)(nil),        // 36: moby.buildkit.v1.frontend.NewContainerRequest
+	(*NewContainerResponse)(nil),       // 37: moby.buildkit.v1.frontend.NewContainerResponse
+	(*ReleaseContainerRequest)(nil),    // 38: moby.buildkit.v1.frontend.ReleaseContainerRequest
+	(*ReleaseContainerResponse)(nil),   // 39: moby.buildkit.v1.frontend.ReleaseContainerResponse
+	(*ExecMessage)(nil),                // 40: moby.buildkit.v1.frontend.ExecMessage
+	(*InitMessage)(nil),                // 41: moby.buildkit.v1.frontend.InitMessage
+	(*ExitMessage)(nil),                // 42: moby.buildkit.v1.frontend.ExitMessage
+	(*StartedMessage)(nil),             // 43: moby.buildkit.v1.frontend.StartedMessage
+	(*DoneMessage)(nil),                // 44: moby.buildkit.v1.frontend.DoneMessage
+	(*FdMessage)(nil),                  // 45: moby.buildkit.v1.frontend.FdMessage
+	(*ResizeMessage)(nil),              // 46: moby.buildkit.v1.frontend.ResizeMessage
+	(*SignalMessage)(nil),              // 47: moby.buildkit.v1.frontend.SignalMessage
+	nil,                                // 48: moby.buildkit.v1.frontend.Result.MetadataEntry
+	nil,                                // 49: moby.buildkit.v1.frontend.Result.AttestationsEntry
+	nil,                                // 50: moby.buildkit.v1.frontend.RefMapDeprecated.RefsEntry
+	nil,                                // 51: moby.buildkit.v1.frontend.RefMap.RefsEntry
+	nil,                                // 52: moby.buildkit.v1.frontend.Attestation.MetadataEntry
+	nil,                                // 53: moby.buildkit.v1.frontend.InputsResponse.DefinitionsEntry
+	nil,                                // 54: moby.buildkit.v1.frontend.SolveRequest.FrontendOptEntry
+	nil,                                // 55: moby.buildkit.v1.frontend.SolveRequest.FrontendInputsEntry
+	nil,                                // 56: moby.buildkit.v1.frontend.CacheOptionsEntry.AttrsEntry
+	(*pb.Definition)(nil),              // 57: pb.Definition
+	(*status.Status)(nil),              // 58: google.rpc.Status
+	(*pb.Platform)(nil),                // 59: pb.Platform
+	(*pb1.Policy)(nil),                 // 60: moby.buildkit.v1.sourcepolicy.Policy
+	(*pb.SourceOp)(nil),                // 61: pb.SourceOp
+	(*timestamp.Timestamp)(nil),        // 62: google.protobuf.Timestamp
+	(*types.Stat)(nil),                 // 63: fsutil.types.Stat
+	(*pb2.APICap)(nil),                 // 64: moby.buildkit.v1.apicaps.APICap
+	(*types1.WorkerRecord)(nil),        // 65: moby.buildkit.v1.types.WorkerRecord
+	(*pb.SourceInfo)(nil),              // 66: pb.SourceInfo
+	(*pb.Range)(nil),                   // 67: pb.Range
+	(*pb.Mount)(nil),                   // 68: pb.Mount
+	(pb.NetMode)(0),                    // 69: pb.NetMode
+	(*pb.WorkerConstraints)(nil),       // 70: pb.WorkerConstraints
+	(*pb.HostIP)(nil),                  // 71: pb.HostIP
+	(*pb.Meta)(nil),                    // 72: pb.Meta
+	(pb.SecurityMode)(0),               // 73: pb.SecurityMode
+	(*pb.SecretEnv)(nil),               // 74: pb.SecretEnv
 }
 var file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_depIdxs = []int32{
 	3,  // 0: moby.buildkit.v1.frontend.Result.refsDeprecated:type_name -> moby.buildkit.v1.frontend.RefMapDeprecated
 	4,  // 1: moby.buildkit.v1.frontend.Result.ref:type_name -> moby.buildkit.v1.frontend.Ref
 	5,  // 2: moby.buildkit.v1.frontend.Result.refs:type_name -> moby.buildkit.v1.frontend.RefMap
-	47, // 3: moby.buildkit.v1.frontend.Result.metadata:type_name -> moby.buildkit.v1.frontend.Result.MetadataEntry
-	48, // 4: moby.buildkit.v1.frontend.Result.attestations:type_name -> moby.buildkit.v1.frontend.Result.AttestationsEntry
-	49, // 5: moby.buildkit.v1.frontend.RefMapDeprecated.refs:type_name -> moby.buildkit.v1.frontend.RefMapDeprecated.RefsEntry
-	56, // 6: moby.buildkit.v1.frontend.Ref.def:type_name -> pb.Definition
-	50, // 7: moby.buildkit.v1.frontend.RefMap.refs:type_name -> moby.buildkit.v1.frontend.RefMap.RefsEntry
+	48, // 3: moby.buildkit.v1.frontend.Result.metadata:type_name -> moby.buildkit.v1.frontend.Result.MetadataEntry
+	49, // 4: moby.buildkit.v1.frontend.Result.attestations:type_name -> moby.buildkit.v1.frontend.Result.AttestationsEntry
+	50, // 5: moby.buildkit.v1.frontend.RefMapDeprecated.refs:type_name -> moby.buildkit.v1.frontend.RefMapDeprecated.RefsEntry
+	57, // 6: moby.buildkit.v1.frontend.Ref.def:type_name -> pb.Definition
+	51, // 7: moby.buildkit.v1.frontend.RefMap.refs:type_name -> moby.buildkit.v1.frontend.RefMap.RefsEntry
 	7,  // 8: moby.buildkit.v1.frontend.Attestations.attestation:type_name -> moby.buildkit.v1.frontend.Attestation
 	0,  // 9: moby.buildkit.v1.frontend.Attestation.kind:type_name -> moby.buildkit.v1.frontend.AttestationKind
-	51, // 10: moby.buildkit.v1.frontend.Attestation.metadata:type_name -> moby.buildkit.v1.frontend.Attestation.MetadataEntry
+	52, // 10: moby.buildkit.v1.frontend.Attestation.metadata:type_name -> moby.buildkit.v1.frontend.Attestation.MetadataEntry
 	4,  // 11: moby.buildkit.v1.frontend.Attestation.ref:type_name -> moby.buildkit.v1.frontend.Ref
 	8,  // 12: moby.buildkit.v1.frontend.Attestation.inTotoSubjects:type_name -> moby.buildkit.v1.frontend.InTotoSubject
 	1,  // 13: moby.buildkit.v1.frontend.InTotoSubject.kind:type_name -> moby.buildkit.v1.frontend.InTotoSubjectKind
 	2,  // 14: moby.buildkit.v1.frontend.ReturnRequest.result:type_name -> moby.buildkit.v1.frontend.Result
-	57, // 15: moby.buildkit.v1.frontend.ReturnRequest.error:type_name -> google.rpc.Status
-	52, // 16: moby.buildkit.v1.frontend.InputsResponse.Definitions:type_name -> moby.buildkit.v1.frontend.InputsResponse.DefinitionsEntry
-	58, // 17: moby.buildkit.v1.frontend.ResolveImageConfigRequest.Platform:type_name -> pb.Platform
-	59, // 18: moby.buildkit.v1.frontend.ResolveImageConfigRequest.SourcePolicies:type_name -> moby.buildkit.v1.sourcepolicy.Policy
-	60, // 19: moby.buildkit.v1.frontend.ResolveSourceMetaRequest.Source:type_name -> pb.SourceOp
-	58, // 20: moby.buildkit.v1.frontend.ResolveSourceMetaRequest.Platform:type_name -> pb.Platform
-	59, // 21: moby.buildkit.v1.frontend.ResolveSourceMetaRequest.SourcePolicies:type_name -> moby.buildkit.v1.sourcepolicy.Policy
-	60, // 22: moby.buildkit.v1.frontend.ResolveSourceMetaResponse.Source:type_name -> pb.SourceOp
+	58, // 15: moby.buildkit.v1.frontend.ReturnRequest.error:type_name -> google.rpc.Status
+	53, // 16: moby.buildkit.v1.frontend.InputsResponse.Definitions:type_name -> moby.buildkit.v1.frontend.InputsResponse.DefinitionsEntry
+	59, // 17: moby.buildkit.v1.frontend.ResolveImageConfigRequest.Platform:type_name -> pb.Platform
+	60, // 18: moby.buildkit.v1.frontend.ResolveImageConfigRequest.SourcePolicies:type_name -> moby.buildkit.v1.sourcepolicy.Policy
+	61, // 19: moby.buildkit.v1.frontend.ResolveSourceMetaRequest.Source:type_name -> pb.SourceOp
+	59, // 20: moby.buildkit.v1.frontend.ResolveSourceMetaRequest.Platform:type_name -> pb.Platform
+	60, // 21: moby.buildkit.v1.frontend.ResolveSourceMetaRequest.SourcePolicies:type_name -> moby.buildkit.v1.sourcepolicy.Policy
+	61, // 22: moby.buildkit.v1.frontend.ResolveSourceMetaResponse.Source:type_name -> pb.SourceOp
 	17, // 23: moby.buildkit.v1.frontend.ResolveSourceMetaResponse.Image:type_name -> moby.buildkit.v1.frontend.ResolveSourceImageResponse
 	18, // 24: moby.buildkit.v1.frontend.ResolveSourceMetaResponse.Git:type_name -> moby.buildkit.v1.frontend.ResolveSourceGitResponse
-	56, // 25: moby.buildkit.v1.frontend.SolveRequest.Definition:type_name -> pb.Definition
-	53, // 26: moby.buildkit.v1.frontend.SolveRequest.FrontendOpt:type_name -> moby.buildkit.v1.frontend.SolveRequest.FrontendOptEntry
-	20, // 27: moby.buildkit.v1.frontend.SolveRequest.CacheImports:type_name -> moby.buildkit.v1.frontend.CacheOptionsEntry
-	54, // 28: moby.buildkit.v1.frontend.SolveRequest.FrontendInputs:type_name -> moby.buildkit.v1.frontend.SolveRequest.FrontendInputsEntry
-	59, // 29: moby.buildkit.v1.frontend.SolveRequest.SourcePolicies:type_name -> moby.buildkit.v1.sourcepolicy.Policy
-	55, // 30: moby.buildkit.v1.frontend.CacheOptionsEntry.Attrs:type_name -> moby.buildkit.v1.frontend.CacheOptionsEntry.AttrsEntry
-	2,  // 31: moby.buildkit.v1.frontend.SolveResponse.result:type_name -> moby.buildkit.v1.frontend.Result
-	23, // 32: moby.buildkit.v1.frontend.ReadFileRequest.Range:type_name -> moby.buildkit.v1.frontend.FileRange
-	61, // 33: moby.buildkit.v1.frontend.ReadDirResponse.entries:type_name -> fsutil.types.Stat
-	61, // 34: moby.buildkit.v1.frontend.StatFileResponse.stat:type_name -> fsutil.types.Stat
-	62, // 35: moby.buildkit.v1.frontend.PongResponse.FrontendAPICaps:type_name -> moby.buildkit.v1.apicaps.APICap
-	62, // 36: moby.buildkit.v1.frontend.PongResponse.LLBCaps:type_name -> moby.buildkit.v1.apicaps.APICap
-	63, // 37: moby.buildkit.v1.frontend.PongResponse.Workers:type_name -> moby.buildkit.v1.types.WorkerRecord
-	64, // 38: moby.buildkit.v1.frontend.WarnRequest.info:type_name -> pb.SourceInfo
-	65, // 39: moby.buildkit.v1.frontend.WarnRequest.ranges:type_name -> pb.Range
-	66, // 40: moby.buildkit.v1.frontend.NewContainerRequest.Mounts:type_name -> pb.Mount
-	67, // 41: moby.buildkit.v1.frontend.NewContainerRequest.Network:type_name -> pb.NetMode
-	58, // 42: moby.buildkit.v1.frontend.NewContainerRequest.platform:type_name -> pb.Platform
-	68, // 43: moby.buildkit.v1.frontend.NewContainerRequest.constraints:type_name -> pb.WorkerConstraints
-	69, // 44: moby.buildkit.v1.frontend.NewContainerRequest.extraHosts:type_name -> pb.HostIP
-	40, // 45: moby.buildkit.v1.frontend.ExecMessage.Init:type_name -> moby.buildkit.v1.frontend.InitMessage
-	44, // 46: moby.buildkit.v1.frontend.ExecMessage.File:type_name -> moby.buildkit.v1.frontend.FdMessage
-	45, // 47: moby.buildkit.v1.frontend.ExecMessage.Resize:type_name -> moby.buildkit.v1.frontend.ResizeMessage
-	42, // 48: moby.buildkit.v1.frontend.ExecMessage.Started:type_name -> moby.buildkit.v1.frontend.StartedMessage
-	41, // 49: moby.buildkit.v1.frontend.ExecMessage.Exit:type_name -> moby.buildkit.v1.frontend.ExitMessage
-	43, // 50: moby.buildkit.v1.frontend.ExecMessage.Done:type_name -> moby.buildkit.v1.frontend.DoneMessage
-	46, // 51: moby.buildkit.v1.frontend.ExecMessage.Signal:type_name -> moby.buildkit.v1.frontend.SignalMessage
-	70, // 52: moby.buildkit.v1.frontend.InitMessage.Meta:type_name -> pb.Meta
-	71, // 53: moby.buildkit.v1.frontend.InitMessage.Security:type_name -> pb.SecurityMode
-	72, // 54: moby.buildkit.v1.frontend.InitMessage.secretenv:type_name -> pb.SecretEnv
-	57, // 55: moby.buildkit.v1.frontend.ExitMessage.Error:type_name -> google.rpc.Status
-	6,  // 56: moby.buildkit.v1.frontend.Result.AttestationsEntry.value:type_name -> moby.buildkit.v1.frontend.Attestations
-	4,  // 57: moby.buildkit.v1.frontend.RefMap.RefsEntry.value:type_name -> moby.buildkit.v1.frontend.Ref
-	56, // 58: moby.buildkit.v1.frontend.InputsResponse.DefinitionsEntry.value:type_name -> pb.Definition
-	56, // 59: moby.buildkit.v1.frontend.SolveRequest.FrontendInputsEntry.value:type_name -> pb.Definition
-	13, // 60: moby.buildkit.v1.frontend.LLBBridge.ResolveImageConfig:input_type -> moby.buildkit.v1.frontend.ResolveImageConfigRequest
-	15, // 61: moby.buildkit.v1.frontend.LLBBridge.ResolveSourceMeta:input_type -> moby.buildkit.v1.frontend.ResolveSourceMetaRequest
-	19, // 62: moby.buildkit.v1.frontend.LLBBridge.Solve:input_type -> moby.buildkit.v1.frontend.SolveRequest
-	22, // 63: moby.buildkit.v1.frontend.LLBBridge.ReadFile:input_type -> moby.buildkit.v1.frontend.ReadFileRequest
-	25, // 64: moby.buildkit.v1.frontend.LLBBridge.ReadDir:input_type -> moby.buildkit.v1.frontend.ReadDirRequest
-	27, // 65: moby.buildkit.v1.frontend.LLBBridge.StatFile:input_type -> moby.buildkit.v1.frontend.StatFileRequest
-	29, // 66: moby.buildkit.v1.frontend.LLBBridge.Evaluate:input_type -> moby.buildkit.v1.frontend.EvaluateRequest
-	31, // 67: moby.buildkit.v1.frontend.LLBBridge.Ping:input_type -> moby.buildkit.v1.frontend.PingRequest
-	9,  // 68: moby.buildkit.v1.frontend.LLBBridge.Return:input_type -> moby.buildkit.v1.frontend.ReturnRequest
-	11, // 69: moby.buildkit.v1.frontend.LLBBridge.Inputs:input_type -> moby.buildkit.v1.frontend.InputsRequest
-	35, // 70: moby.buildkit.v1.frontend.LLBBridge.NewContainer:input_type -> moby.buildkit.v1.frontend.NewContainerRequest
-	37, // 71: moby.buildkit.v1.frontend.LLBBridge.ReleaseContainer:input_type -> moby.buildkit.v1.frontend.ReleaseContainerRequest
-	39, // 72: moby.buildkit.v1.frontend.LLBBridge.ExecProcess:input_type -> moby.buildkit.v1.frontend.ExecMessage
-	33, // 73: moby.buildkit.v1.frontend.LLBBridge.Warn:input_type -> moby.buildkit.v1.frontend.WarnRequest
-	14, // 74: moby.buildkit.v1.frontend.LLBBridge.ResolveImageConfig:output_type -> moby.buildkit.v1.frontend.ResolveImageConfigResponse
-	16, // 75: moby.buildkit.v1.frontend.LLBBridge.ResolveSourceMeta:output_type -> moby.buildkit.v1.frontend.ResolveSourceMetaResponse
-	21, // 76: moby.buildkit.v1.frontend.LLBBridge.Solve:output_type -> moby.buildkit.v1.frontend.SolveResponse
-	24, // 77: moby.buildkit.v1.frontend.LLBBridge.ReadFile:output_type -> moby.buildkit.v1.frontend.ReadFileResponse
-	26, // 78: moby.buildkit.v1.frontend.LLBBridge.ReadDir:output_type -> moby.buildkit.v1.frontend.ReadDirResponse
-	28, // 79: moby.buildkit.v1.frontend.LLBBridge.StatFile:output_type -> moby.buildkit.v1.frontend.StatFileResponse
-	30, // 80: moby.buildkit.v1.frontend.LLBBridge.Evaluate:output_type -> moby.buildkit.v1.frontend.EvaluateResponse
-	32, // 81: moby.buildkit.v1.frontend.LLBBridge.Ping:output_type -> moby.buildkit.v1.frontend.PongResponse
-	10, // 82: moby.buildkit.v1.frontend.LLBBridge.Return:output_type -> moby.buildkit.v1.frontend.ReturnResponse
-	12, // 83: moby.buildkit.v1.frontend.LLBBridge.Inputs:output_type -> moby.buildkit.v1.frontend.InputsResponse
-	36, // 84: moby.buildkit.v1.frontend.LLBBridge.NewContainer:output_type -> moby.buildkit.v1.frontend.NewContainerResponse
-	38, // 85: moby.buildkit.v1.frontend.LLBBridge.ReleaseContainer:output_type -> moby.buildkit.v1.frontend.ReleaseContainerResponse
-	39, // 86: moby.buildkit.v1.frontend.LLBBridge.ExecProcess:output_type -> moby.buildkit.v1.frontend.ExecMessage
-	34, // 87: moby.buildkit.v1.frontend.LLBBridge.Warn:output_type -> moby.buildkit.v1.frontend.WarnResponse
-	74, // [74:88] is the sub-list for method output_type
-	60, // [60:74] is the sub-list for method input_type
-	60, // [60:60] is the sub-list for extension type_name
-	60, // [60:60] is the sub-list for extension extendee
-	0,  // [0:60] is the sub-list for field type_name
+	19, // 25: moby.buildkit.v1.frontend.ResolveSourceMetaResponse.HTTP:type_name -> moby.buildkit.v1.frontend.ResolveSourceHTTPResponse
+	62, // 26: moby.buildkit.v1.frontend.ResolveSourceHTTPResponse.LastModified:type_name -> google.protobuf.Timestamp
+	57, // 27: moby.buildkit.v1.frontend.SolveRequest.Definition:type_name -> pb.Definition
+	54, // 28: moby.buildkit.v1.frontend.SolveRequest.FrontendOpt:type_name -> moby.buildkit.v1.frontend.SolveRequest.FrontendOptEntry
+	21, // 29: moby.buildkit.v1.frontend.SolveRequest.CacheImports:type_name -> moby.buildkit.v1.frontend.CacheOptionsEntry
+	55, // 30: moby.buildkit.v1.frontend.SolveRequest.FrontendInputs:type_name -> moby.buildkit.v1.frontend.SolveRequest.FrontendInputsEntry
+	60, // 31: moby.buildkit.v1.frontend.SolveRequest.SourcePolicies:type_name -> moby.buildkit.v1.sourcepolicy.Policy
+	56, // 32: moby.buildkit.v1.frontend.CacheOptionsEntry.Attrs:type_name -> moby.buildkit.v1.frontend.CacheOptionsEntry.AttrsEntry
+	2,  // 33: moby.buildkit.v1.frontend.SolveResponse.result:type_name -> moby.buildkit.v1.frontend.Result
+	24, // 34: moby.buildkit.v1.frontend.ReadFileRequest.Range:type_name -> moby.buildkit.v1.frontend.FileRange
+	63, // 35: moby.buildkit.v1.frontend.ReadDirResponse.entries:type_name -> fsutil.types.Stat
+	63, // 36: moby.buildkit.v1.frontend.StatFileResponse.stat:type_name -> fsutil.types.Stat
+	64, // 37: moby.buildkit.v1.frontend.PongResponse.FrontendAPICaps:type_name -> moby.buildkit.v1.apicaps.APICap
+	64, // 38: moby.buildkit.v1.frontend.PongResponse.LLBCaps:type_name -> moby.buildkit.v1.apicaps.APICap
+	65, // 39: moby.buildkit.v1.frontend.PongResponse.Workers:type_name -> moby.buildkit.v1.types.WorkerRecord
+	66, // 40: moby.buildkit.v1.frontend.WarnRequest.info:type_name -> pb.SourceInfo
+	67, // 41: moby.buildkit.v1.frontend.WarnRequest.ranges:type_name -> pb.Range
+	68, // 42: moby.buildkit.v1.frontend.NewContainerRequest.Mounts:type_name -> pb.Mount
+	69, // 43: moby.buildkit.v1.frontend.NewContainerRequest.Network:type_name -> pb.NetMode
+	59, // 44: moby.buildkit.v1.frontend.NewContainerRequest.platform:type_name -> pb.Platform
+	70, // 45: moby.buildkit.v1.frontend.NewContainerRequest.constraints:type_name -> pb.WorkerConstraints
+	71, // 46: moby.buildkit.v1.frontend.NewContainerRequest.extraHosts:type_name -> pb.HostIP
+	41, // 47: moby.buildkit.v1.frontend.ExecMessage.Init:type_name -> moby.buildkit.v1.frontend.InitMessage
+	45, // 48: moby.buildkit.v1.frontend.ExecMessage.File:type_name -> moby.buildkit.v1.frontend.FdMessage
+	46, // 49: moby.buildkit.v1.frontend.ExecMessage.Resize:type_name -> moby.buildkit.v1.frontend.ResizeMessage
+	43, // 50: moby.buildkit.v1.frontend.ExecMessage.Started:type_name -> moby.buildkit.v1.frontend.StartedMessage
+	42, // 51: moby.buildkit.v1.frontend.ExecMessage.Exit:type_name -> moby.buildkit.v1.frontend.ExitMessage
+	44, // 52: moby.buildkit.v1.frontend.ExecMessage.Done:type_name -> moby.buildkit.v1.frontend.DoneMessage
+	47, // 53: moby.buildkit.v1.frontend.ExecMessage.Signal:type_name -> moby.buildkit.v1.frontend.SignalMessage
+	72, // 54: moby.buildkit.v1.frontend.InitMessage.Meta:type_name -> pb.Meta
+	73, // 55: moby.buildkit.v1.frontend.InitMessage.Security:type_name -> pb.SecurityMode
+	74, // 56: moby.buildkit.v1.frontend.InitMessage.secretenv:type_name -> pb.SecretEnv
+	58, // 57: moby.buildkit.v1.frontend.ExitMessage.Error:type_name -> google.rpc.Status
+	6,  // 58: moby.buildkit.v1.frontend.Result.AttestationsEntry.value:type_name -> moby.buildkit.v1.frontend.Attestations
+	4,  // 59: moby.buildkit.v1.frontend.RefMap.RefsEntry.value:type_name -> moby.buildkit.v1.frontend.Ref
+	57, // 60: moby.buildkit.v1.frontend.InputsResponse.DefinitionsEntry.value:type_name -> pb.Definition
+	57, // 61: moby.buildkit.v1.frontend.SolveRequest.FrontendInputsEntry.value:type_name -> pb.Definition
+	13, // 62: moby.buildkit.v1.frontend.LLBBridge.ResolveImageConfig:input_type -> moby.buildkit.v1.frontend.ResolveImageConfigRequest
+	15, // 63: moby.buildkit.v1.frontend.LLBBridge.ResolveSourceMeta:input_type -> moby.buildkit.v1.frontend.ResolveSourceMetaRequest
+	20, // 64: moby.buildkit.v1.frontend.LLBBridge.Solve:input_type -> moby.buildkit.v1.frontend.SolveRequest
+	23, // 65: moby.buildkit.v1.frontend.LLBBridge.ReadFile:input_type -> moby.buildkit.v1.frontend.ReadFileRequest
+	26, // 66: moby.buildkit.v1.frontend.LLBBridge.ReadDir:input_type -> moby.buildkit.v1.frontend.ReadDirRequest
+	28, // 67: moby.buildkit.v1.frontend.LLBBridge.StatFile:input_type -> moby.buildkit.v1.frontend.StatFileRequest
+	30, // 68: moby.buildkit.v1.frontend.LLBBridge.Evaluate:input_type -> moby.buildkit.v1.frontend.EvaluateRequest
+	32, // 69: moby.buildkit.v1.frontend.LLBBridge.Ping:input_type -> moby.buildkit.v1.frontend.PingRequest
+	9,  // 70: moby.buildkit.v1.frontend.LLBBridge.Return:input_type -> moby.buildkit.v1.frontend.ReturnRequest
+	11, // 71: moby.buildkit.v1.frontend.LLBBridge.Inputs:input_type -> moby.buildkit.v1.frontend.InputsRequest
+	36, // 72: moby.buildkit.v1.frontend.LLBBridge.NewContainer:input_type -> moby.buildkit.v1.frontend.NewContainerRequest
+	38, // 73: moby.buildkit.v1.frontend.LLBBridge.ReleaseContainer:input_type -> moby.buildkit.v1.frontend.ReleaseContainerRequest
+	40, // 74: moby.buildkit.v1.frontend.LLBBridge.ExecProcess:input_type -> moby.buildkit.v1.frontend.ExecMessage
+	34, // 75: moby.buildkit.v1.frontend.LLBBridge.Warn:input_type -> moby.buildkit.v1.frontend.WarnRequest
+	14, // 76: moby.buildkit.v1.frontend.LLBBridge.ResolveImageConfig:output_type -> moby.buildkit.v1.frontend.ResolveImageConfigResponse
+	16, // 77: moby.buildkit.v1.frontend.LLBBridge.ResolveSourceMeta:output_type -> moby.buildkit.v1.frontend.ResolveSourceMetaResponse
+	22, // 78: moby.buildkit.v1.frontend.LLBBridge.Solve:output_type -> moby.buildkit.v1.frontend.SolveResponse
+	25, // 79: moby.buildkit.v1.frontend.LLBBridge.ReadFile:output_type -> moby.buildkit.v1.frontend.ReadFileResponse
+	27, // 80: moby.buildkit.v1.frontend.LLBBridge.ReadDir:output_type -> moby.buildkit.v1.frontend.ReadDirResponse
+	29, // 81: moby.buildkit.v1.frontend.LLBBridge.StatFile:output_type -> moby.buildkit.v1.frontend.StatFileResponse
+	31, // 82: moby.buildkit.v1.frontend.LLBBridge.Evaluate:output_type -> moby.buildkit.v1.frontend.EvaluateResponse
+	33, // 83: moby.buildkit.v1.frontend.LLBBridge.Ping:output_type -> moby.buildkit.v1.frontend.PongResponse
+	10, // 84: moby.buildkit.v1.frontend.LLBBridge.Return:output_type -> moby.buildkit.v1.frontend.ReturnResponse
+	12, // 85: moby.buildkit.v1.frontend.LLBBridge.Inputs:output_type -> moby.buildkit.v1.frontend.InputsResponse
+	37, // 86: moby.buildkit.v1.frontend.LLBBridge.NewContainer:output_type -> moby.buildkit.v1.frontend.NewContainerResponse
+	39, // 87: moby.buildkit.v1.frontend.LLBBridge.ReleaseContainer:output_type -> moby.buildkit.v1.frontend.ReleaseContainerResponse
+	40, // 88: moby.buildkit.v1.frontend.LLBBridge.ExecProcess:output_type -> moby.buildkit.v1.frontend.ExecMessage
+	35, // 89: moby.buildkit.v1.frontend.LLBBridge.Warn:output_type -> moby.buildkit.v1.frontend.WarnResponse
+	76, // [76:90] is the sub-list for method output_type
+	62, // [62:76] is the sub-list for method input_type
+	62, // [62:62] is the sub-list for extension type_name
+	62, // [62:62] is the sub-list for extension extendee
+	0,  // [0:62] is the sub-list for field type_name
 }
 
 func init() { file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_init() }
@@ -3231,7 +3309,7 @@ func file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_init() {
 		(*Result_Ref)(nil),
 		(*Result_Refs)(nil),
 	}
-	file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[37].OneofWrappers = []any{
+	file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_msgTypes[38].OneofWrappers = []any{
 		(*ExecMessage_Init)(nil),
 		(*ExecMessage_File)(nil),
 		(*ExecMessage_Resize)(nil),
@@ -3246,7 +3324,7 @@ func file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDesc), len(file_github_com_moby_buildkit_frontend_gateway_pb_gateway_proto_rawDesc)),
 			NumEnums:      2,
-			NumMessages:   54,
+			NumMessages:   55,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/frontend/gateway/pb/gateway.proto b/frontend/gateway/pb/gateway.proto
index af2c48191b0f..087e3efa6e23 100644
--- a/frontend/gateway/pb/gateway.proto
+++ b/frontend/gateway/pb/gateway.proto
@@ -9,6 +9,7 @@ import "github.com/moby/buildkit/solver/pb/ops.proto";
 import "github.com/moby/buildkit/sourcepolicy/pb/policy.proto";
 import "github.com/moby/buildkit/util/apicaps/pb/caps.proto";
 import "github.com/tonistiigi/fsutil/types/stat.proto";
+import "google/protobuf/timestamp.proto";
 import "google/rpc/status.proto";
 
 service LLBBridge {
@@ -141,6 +142,7 @@ message ResolveSourceMetaResponse {
 	pb.SourceOp Source = 1;
 	ResolveSourceImageResponse Image = 2;
 	ResolveSourceGitResponse Git = 3;
+	ResolveSourceHTTPResponse HTTP = 4;
 }
 
 message ResolveSourceImageResponse {
@@ -154,6 +156,12 @@ message ResolveSourceGitResponse {
 	string CommitChecksum = 3;
 }
 
+message ResolveSourceHTTPResponse {
+	string Checksum = 1;
+	string Filename = 2;
+	google.protobuf.Timestamp LastModified = 3;
+}
+
 message SolveRequest {
 	pb.Definition Definition = 1;
 	string Frontend = 2;
diff --git a/frontend/gateway/pb/gateway_vtproto.pb.go b/frontend/gateway/pb/gateway_vtproto.pb.go
index 4d607d62d5e9..15c3a93fd56f 100644
--- a/frontend/gateway/pb/gateway_vtproto.pb.go
+++ b/frontend/gateway/pb/gateway_vtproto.pb.go
@@ -6,11 +6,13 @@ package moby_buildkit_v1_frontend
 
 import (
 	fmt "fmt"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
 	types1 "github.com/moby/buildkit/api/types"
 	pb "github.com/moby/buildkit/solver/pb"
 	pb1 "github.com/moby/buildkit/sourcepolicy/pb"
 	pb2 "github.com/moby/buildkit/util/apicaps/pb"
 	protohelpers "github.com/planetscale/vtprotobuf/protohelpers"
+	timestamppb "github.com/planetscale/vtprotobuf/types/known/timestamppb"
 	types "github.com/tonistiigi/fsutil/types"
 	status "google.golang.org/genproto/googleapis/rpc/status"
 	proto "google.golang.org/protobuf/proto"
@@ -409,6 +411,7 @@ func (m *ResolveSourceMetaResponse) CloneVT() *ResolveSourceMetaResponse {
 	r.Source = m.Source.CloneVT()
 	r.Image = m.Image.CloneVT()
 	r.Git = m.Git.CloneVT()
+	r.HTTP = m.HTTP.CloneVT()
 	if len(m.unknownFields) > 0 {
 		r.unknownFields = make([]byte, len(m.unknownFields))
 		copy(r.unknownFields, m.unknownFields)
@@ -461,6 +464,25 @@ func (m *ResolveSourceGitResponse) CloneMessageVT() proto.Message {
 	return m.CloneVT()
 }
 
+func (m *ResolveSourceHTTPResponse) CloneVT() *ResolveSourceHTTPResponse {
+	if m == nil {
+		return (*ResolveSourceHTTPResponse)(nil)
+	}
+	r := new(ResolveSourceHTTPResponse)
+	r.Checksum = m.Checksum
+	r.Filename = m.Filename
+	r.LastModified = (*timestamp.Timestamp)((*timestamppb.Timestamp)(m.LastModified).CloneVT())
+	if len(m.unknownFields) > 0 {
+		r.unknownFields = make([]byte, len(m.unknownFields))
+		copy(r.unknownFields, m.unknownFields)
+	}
+	return r
+}
+
+func (m *ResolveSourceHTTPResponse) CloneMessageVT() proto.Message {
+	return m.CloneVT()
+}
+
 func (m *SolveRequest) CloneVT() *SolveRequest {
 	if m == nil {
 		return (*SolveRequest)(nil)
@@ -1749,6 +1771,9 @@ func (this *ResolveSourceMetaResponse) EqualVT(that *ResolveSourceMetaResponse)
 	if !this.Git.EqualVT(that.Git) {
 		return false
 	}
+	if !this.HTTP.EqualVT(that.HTTP) {
+		return false
+	}
 	return string(this.unknownFields) == string(that.unknownFields)
 }
 
@@ -1806,6 +1831,31 @@ func (this *ResolveSourceGitResponse) EqualMessageVT(thatMsg proto.Message) bool
 	}
 	return this.EqualVT(that)
 }
+func (this *ResolveSourceHTTPResponse) EqualVT(that *ResolveSourceHTTPResponse) bool {
+	if this == that {
+		return true
+	} else if this == nil || that == nil {
+		return false
+	}
+	if this.Checksum != that.Checksum {
+		return false
+	}
+	if this.Filename != that.Filename {
+		return false
+	}
+	if !(*timestamppb.Timestamp)(this.LastModified).EqualVT((*timestamppb.Timestamp)(that.LastModified)) {
+		return false
+	}
+	return string(this.unknownFields) == string(that.unknownFields)
+}
+
+func (this *ResolveSourceHTTPResponse) EqualMessageVT(thatMsg proto.Message) bool {
+	that, ok := thatMsg.(*ResolveSourceHTTPResponse)
+	if !ok {
+		return false
+	}
+	return this.EqualVT(that)
+}
 func (this *SolveRequest) EqualVT(that *SolveRequest) bool {
 	if this == that {
 		return true
@@ -3785,6 +3835,16 @@ func (m *ResolveSourceMetaResponse) MarshalToSizedBufferVT(dAtA []byte) (int, er
 		i -= len(m.unknownFields)
 		copy(dAtA[i:], m.unknownFields)
 	}
+	if m.HTTP != nil {
+		size, err := m.HTTP.MarshalToSizedBufferVT(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x22
+	}
 	if m.Git != nil {
 		size, err := m.Git.MarshalToSizedBufferVT(dAtA[:i])
 		if err != nil {
@@ -3919,6 +3979,63 @@ func (m *ResolveSourceGitResponse) MarshalToSizedBufferVT(dAtA []byte) (int, err
 	return len(dAtA) - i, nil
 }
 
+func (m *ResolveSourceHTTPResponse) MarshalVT() (dAtA []byte, err error) {
+	if m == nil {
+		return nil, nil
+	}
+	size := m.SizeVT()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBufferVT(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *ResolveSourceHTTPResponse) MarshalToVT(dAtA []byte) (int, error) {
+	size := m.SizeVT()
+	return m.MarshalToSizedBufferVT(dAtA[:size])
+}
+
+func (m *ResolveSourceHTTPResponse) MarshalToSizedBufferVT(dAtA []byte) (int, error) {
+	if m == nil {
+		return 0, nil
+	}
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.unknownFields != nil {
+		i -= len(m.unknownFields)
+		copy(dAtA[i:], m.unknownFields)
+	}
+	if m.LastModified != nil {
+		size, err := (*timestamppb.Timestamp)(m.LastModified).MarshalToSizedBufferVT(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x1a
+	}
+	if len(m.Filename) > 0 {
+		i -= len(m.Filename)
+		copy(dAtA[i:], m.Filename)
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(len(m.Filename)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.Checksum) > 0 {
+		i -= len(m.Checksum)
+		copy(dAtA[i:], m.Checksum)
+		i = protohelpers.EncodeVarint(dAtA, i, uint64(len(m.Checksum)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *SolveRequest) MarshalVT() (dAtA []byte, err error) {
 	if m == nil {
 		return nil, nil
@@ -6021,6 +6138,10 @@ func (m *ResolveSourceMetaResponse) SizeVT() (n int) {
 		l = m.Git.SizeVT()
 		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
 	}
+	if m.HTTP != nil {
+		l = m.HTTP.SizeVT()
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }
@@ -6065,6 +6186,28 @@ func (m *ResolveSourceGitResponse) SizeVT() (n int) {
 	return n
 }
 
+func (m *ResolveSourceHTTPResponse) SizeVT() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.Checksum)
+	if l > 0 {
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
+	l = len(m.Filename)
+	if l > 0 {
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
+	if m.LastModified != nil {
+		l = (*timestamppb.Timestamp)(m.LastModified).SizeVT()
+		n += 1 + l + protohelpers.SizeOfVarint(uint64(l))
+	}
+	n += len(m.unknownFields)
+	return n
+}
+
 func (m *SolveRequest) SizeVT() (n int) {
 	if m == nil {
 		return 0
@@ -9450,6 +9593,42 @@ func (m *ResolveSourceMetaResponse) UnmarshalVT(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field HTTP", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.HTTP == nil {
+				m.HTTP = &ResolveSourceHTTPResponse{}
+			}
+			if err := m.HTTP.UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := protohelpers.Skip(dAtA[iNdEx:])
@@ -9736,6 +9915,157 @@ func (m *ResolveSourceGitResponse) UnmarshalVT(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *ResolveSourceHTTPResponse) UnmarshalVT(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return protohelpers.ErrIntOverflow
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: ResolveSourceHTTPResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ResolveSourceHTTPResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Checksum", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Checksum = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Filename", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Filename = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field LastModified", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return protohelpers.ErrIntOverflow
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.LastModified == nil {
+				m.LastModified = &timestamp.Timestamp{}
+			}
+			if err := (*timestamppb.Timestamp)(m.LastModified).UnmarshalVT(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := protohelpers.Skip(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return protohelpers.ErrInvalidLength
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.unknownFields = append(m.unknownFields, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func (m *SolveRequest) UnmarshalVT(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
diff --git a/source/http/source.go b/source/http/source.go
index da36bdea026f..6f15bf2c48ad 100644
--- a/source/http/source.go
+++ b/source/http/source.go
@@ -52,28 +52,30 @@ type Opt struct {
 	Transport     http.RoundTripper
 }
 
-type httpSource struct {
+type Source struct {
 	cache     cache.Accessor
 	transport http.RoundTripper
 }
 
-func NewSource(opt Opt) (source.Source, error) {
+var _ source.Source = &Source{}
+
+func NewSource(opt Opt) (*Source, error) {
 	transport := opt.Transport
 	if transport == nil {
 		transport = tracing.DefaultTransport
 	}
-	hs := &httpSource{
+	hs := &Source{
 		cache:     opt.CacheAccessor,
 		transport: transport,
 	}
 	return hs, nil
 }
 
-func (hs *httpSource) Schemes() []string {
+func (hs *Source) Schemes() []string {
 	return []string{srctypes.HTTPScheme, srctypes.HTTPSScheme}
 }
 
-func (hs *httpSource) Identifier(scheme, ref string, attrs map[string]string, platform *pb.Platform) (source.Identifier, error) {
+func (hs *Source) Identifier(scheme, ref string, attrs map[string]string, platform *pb.Platform) (source.Identifier, error) {
 	id, err := NewHTTPIdentifier(ref, scheme == "https")
 	if err != nil {
 		return nil, err
@@ -128,24 +130,39 @@ func (hs *httpSource) Identifier(scheme, ref string, attrs map[string]string, pl
 	return id, nil
 }
 
+type Metadata struct {
+	Digest       digest.Digest
+	Filename     string
+	LastModified *time.Time
+}
+
 type httpSourceHandler struct {
-	*httpSource
+	*Source
 	src      HTTPIdentifier
 	refID    string
 	cacheKey digest.Digest
 	sm       *session.Manager
 }
 
-func (hs *httpSource) Resolve(ctx context.Context, id source.Identifier, sm *session.Manager, _ solver.Vertex) (source.SourceInstance, error) {
+func (hs *Source) ResolveMetadata(ctx context.Context, id *HTTPIdentifier, sm *session.Manager, g session.Group) (*Metadata, error) {
+	hsh := &httpSourceHandler{
+		src:    *id,
+		Source: hs,
+		sm:     sm,
+	}
+	return hsh.resolveMetadata(ctx, g)
+}
+
+func (hs *Source) Resolve(ctx context.Context, id source.Identifier, sm *session.Manager, _ solver.Vertex) (source.SourceInstance, error) {
 	httpIdentifier, ok := id.(*HTTPIdentifier)
 	if !ok {
 		return nil, errors.Errorf("invalid http identifier %v", id)
 	}
 
 	return &httpSourceHandler{
-		src:        *httpIdentifier,
-		httpSource: hs,
-		sm:         sm,
+		src:    *httpIdentifier,
+		Source: hs,
+		sm:     sm,
 	}, nil
 }
 
@@ -178,7 +195,11 @@ func (hs *httpSourceHandler) urlHash() (digest.Digest, error) {
 	return digest.FromBytes(dt), nil
 }
 
-func (hs *httpSourceHandler) formatCacheKey(filename string, dgst digest.Digest, lastModTime string) digest.Digest {
+func (hs *httpSourceHandler) formatCacheKey(filename string, dgst digest.Digest, lastModTime *time.Time) digest.Digest {
+	var lastModTimeStr string
+	if lastModTime != nil {
+		lastModTimeStr = lastModTime.Format(http.TimeFormat)
+	}
 	dt, err := json.Marshal(struct {
 		Filename         string
 		Perm, UID, GID   int
@@ -192,7 +213,7 @@ func (hs *httpSourceHandler) formatCacheKey(filename string, dgst digest.Digest,
 		UID:              hs.src.UID,
 		GID:              hs.src.GID,
 		Checksum:         dgst,
-		LastModTime:      lastModTime,
+		LastModTime:      lastModTimeStr,
 		AuthHeaderSecret: hs.src.AuthHeaderSecret,
 		Header:           hs.src.Header,
 	})
@@ -205,26 +226,28 @@ func (hs *httpSourceHandler) formatCacheKey(filename string, dgst digest.Digest,
 	return dgst
 }
 
-func (hs *httpSourceHandler) CacheKey(ctx context.Context, g session.Group, index int) (string, string, solver.CacheOpts, bool, error) {
+func (hs *httpSourceHandler) resolveMetadata(ctx context.Context, g session.Group) (*Metadata, error) {
 	if hs.src.Checksum != "" {
-		hs.cacheKey = hs.src.Checksum
-		return hs.formatCacheKey(getFileName(hs.src.URL, hs.src.Filename, nil), hs.src.Checksum, "").String(), hs.src.Checksum.String(), nil, true, nil
+		return &Metadata{
+			Digest:   hs.src.Checksum,
+			Filename: getFileName(hs.src.URL, hs.src.Filename, nil),
+		}, nil
 	}
 
 	uh, err := hs.urlHash()
 	if err != nil {
-		return "", "", nil, false, err
+		return nil, err
 	}
 
 	// look up metadata(previously stored headers) for that URL
 	mds, err := searchHTTPURLDigest(ctx, hs.cache, uh)
 	if err != nil {
-		return "", "", nil, false, errors.Wrapf(err, "failed to search metadata for %s", uh)
+		return nil, errors.Wrapf(err, "failed to search metadata for %s", uh)
 	}
 
 	req, err := hs.newHTTPRequest(ctx, g)
 	if err != nil {
-		return "", "", nil, false, err
+		return nil, err
 	}
 	m := map[string]cacheRefMetadata{}
 
@@ -286,10 +309,18 @@ func (hs *httpSourceHandler) CacheKey(ctx context.Context, g session.Group, inde
 					hs.refID = md.ID()
 					dgst := md.getHTTPChecksum()
 					if dgst != "" {
-						hs.cacheKey = dgst
-						modTime := md.getHTTPModTime()
+						var modTime *time.Time
+						if modTimeStr := md.getHTTPModTime(); modTimeStr != "" {
+							if t, err := http.ParseTime(modTimeStr); err == nil {
+								modTime = &t
+							}
+						}
 						resp.Body.Close()
-						return hs.formatCacheKey(getFileName(hs.src.URL, hs.src.Filename, resp), dgst, modTime).String(), dgst.String(), nil, true, nil
+						return &Metadata{
+							Digest:       dgst,
+							Filename:     getFileName(hs.src.URL, hs.src.Filename, resp),
+							LastModified: modTime,
+						}, nil
 					}
 				}
 			}
@@ -304,10 +335,10 @@ func (hs *httpSourceHandler) CacheKey(ctx context.Context, g session.Group, inde
 
 	resp, err := client.Do(req)
 	if err != nil {
-		return "", "", nil, false, err
+		return nil, err
 	}
 	if resp.StatusCode < 200 || resp.StatusCode >= 400 {
-		return "", "", nil, false, errors.Errorf("invalid response status %d", resp.StatusCode)
+		return nil, errors.Errorf("invalid response status %d", resp.StatusCode)
 	}
 	if resp.StatusCode == http.StatusNotModified {
 		respETag := etagValue(resp.Header.Get("ETag"))
@@ -320,29 +351,55 @@ func (hs *httpSourceHandler) CacheKey(ctx context.Context, g session.Group, inde
 		}
 		md, ok := m[respETag]
 		if !ok {
-			return "", "", nil, false, errors.Errorf("invalid not-modified ETag: %v", respETag)
+			return nil, errors.Errorf("invalid not-modified ETag: %v", respETag)
 		}
 		hs.refID = md.ID()
 		dgst := md.getHTTPChecksum()
 		if dgst == "" {
-			return "", "", nil, false, errors.Errorf("invalid metadata change")
+			return nil, errors.Errorf("invalid metadata change")
 		}
-		hs.cacheKey = dgst
-		modTime := md.getHTTPModTime()
-		resp.Body.Close()
 
-		return hs.formatCacheKey(getFileName(hs.src.URL, hs.src.Filename, resp), dgst, modTime).String(), dgst.String(), nil, true, nil
+		resp.Body.Close()
+		var modTime *time.Time
+		if modTimeStr := md.getHTTPModTime(); modTimeStr != "" {
+			if t, err := http.ParseTime(modTimeStr); err == nil {
+				modTime = &t
+			}
+		}
+		return &Metadata{
+			Digest:       dgst,
+			Filename:     getFileName(hs.src.URL, hs.src.Filename, resp),
+			LastModified: modTime,
+		}, nil
 	}
 
 	ref, dgst, err := hs.save(ctx, resp, g)
 	if err != nil {
-		return "", "", nil, false, err
+		return nil, err
 	}
 	ref.Release(context.TODO())
 
-	hs.cacheKey = dgst
+	var modTime *time.Time
+	if modTimeStr := resp.Header.Get("Last-Modified"); modTimeStr != "" {
+		if t, err := http.ParseTime(modTimeStr); err == nil {
+			modTime = &t
+		}
+	}
+
+	return &Metadata{
+		Digest:       dgst,
+		Filename:     getFileName(hs.src.URL, hs.src.Filename, resp),
+		LastModified: modTime,
+	}, nil
+}
 
-	return hs.formatCacheKey(getFileName(hs.src.URL, hs.src.Filename, resp), dgst, resp.Header.Get("Last-Modified")).String(), dgst.String(), nil, true, nil
+func (hs *httpSourceHandler) CacheKey(ctx context.Context, g session.Group, index int) (string, string, solver.CacheOpts, bool, error) {
+	md, err := hs.resolveMetadata(ctx, g)
+	if err != nil {
+		return "", "", nil, false, err
+	}
+	hs.cacheKey = md.Digest
+	return hs.formatCacheKey(md.Filename, md.Digest, md.LastModified).String(), md.Digest.String(), nil, true, nil
 }
 
 func (hs *httpSourceHandler) save(ctx context.Context, resp *http.Response, s session.Group) (ref cache.ImmutableRef, dgst digest.Digest, retErr error) {
diff --git a/util/testutil/httpserver/server.go b/util/testutil/httpserver/server.go
index 221c16da3ce7..de5536365d90 100644
--- a/util/testutil/httpserver/server.go
+++ b/util/testutil/httpserver/server.go
@@ -56,6 +56,10 @@ func (s *TestServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Encoding", resp.ContentEncoding)
 	}
 
+	if resp.ContentDisposition != "" {
+		w.Header().Set("Content-Disposition", resp.ContentDisposition)
+	}
+
 	if resp.Etag != "" {
 		w.Header().Set("ETag", resp.Etag)
 		if match := r.Header.Get("If-None-Match"); match == resp.Etag {
@@ -80,10 +84,11 @@ func (s *TestServer) Stats(name string) (st Stat) {
 }
 
 type Response struct {
-	Content         []byte
-	Etag            string
-	LastModified    *time.Time
-	ContentEncoding string
+	Content            []byte
+	Etag               string
+	LastModified       *time.Time
+	ContentEncoding    string
+	ContentDisposition string
 }
 
 type Stat struct {
diff --git a/worker/base/worker.go b/worker/base/worker.go
index e54d06854b75..70600956fa08 100644
--- a/worker/base/worker.go
+++ b/worker/base/worker.go
@@ -96,6 +96,7 @@ type Worker struct {
 	ImageSource     *containerimage.Source
 	OCILayoutSource *containerimage.Source
 	GitSource       *git.Source
+	HTTPSource      *http.Source
 }
 
 // NewWorker instantiates a local worker
@@ -214,6 +215,7 @@ func NewWorker(ctx context.Context, opt WorkerOpt) (*Worker, error) {
 		ImageSource:     is,
 		OCILayoutSource: os,
 		GitSource:       gitSource,
+		HTTPSource:      hs,
 	}, nil
 }
 
@@ -459,6 +461,22 @@ func (w *Worker) ResolveSourceMetadata(ctx context.Context, op *pb.SourceOp, opt
 				CommitChecksum: md.CommitChecksum,
 			},
 		}, nil
+	case *http.HTTPIdentifier:
+		if w.HTTPSource == nil {
+			return nil, errors.New("http source is not supported")
+		}
+		md, err := w.HTTPSource.ResolveMetadata(ctx, idt, sm, g)
+		if err != nil {
+			return nil, err
+		}
+		return &sourceresolver.MetaResponse{
+			Op: op,
+			HTTP: &sourceresolver.ResolveHTTPResponse{
+				Digest:       md.Digest,
+				Filename:     md.Filename,
+				LastModified: md.LastModified,
+			},
+		}, nil
 	}
 
 	return &sourceresolver.MetaResponse{