feat(driver): 123 Open add URL signing support

drivers/123_open/driver.go

@@ -11,6 +11,7 @@ import (
 	"github.com/go-resty/resty/v2"
 	"net/http"
 	"strconv"
+	"time"
 )
 
 type Open123 struct {
@@ -89,8 +90,24 @@ func (d *Open123) Link(ctx context.Context, file model.Obj, args model.LinkArgs)
 		return nil, fmt.Errorf("get link failed: %s", result.Message)
 	}
 
+	linkURL := result.Data.URL
+	if d.PrivateKey != "" {
+		if d.UID == 0 {
+			return nil, fmt.Errorf("uid is required when private key is set")
+		}
+		duration := time.Duration(d.ValidDuration)
+		if duration <= 0 {
+			duration = 30
+		}
+		signedURL, err := SignURL(linkURL, d.PrivateKey, d.UID, duration*time.Minute)
+		if err != nil {
+			return nil, err
+		}
+		linkURL = signedURL
+	}
+
 	return &model.Link{
-		URL: result.Data.URL,
+		URL: linkURL,
 	}, nil
 }
 

drivers/123_open/meta.go

@@ -8,8 +8,11 @@ import (
 type Addition struct {
 	driver.RootID
 
-	ClientID     string `json:"client_id" required:"true" label:"Client ID"`
-	ClientSecret string `json:"client_secret" required:"true" label:"Client Secret"`
+	ClientID      string `json:"client_id" required:"true" label:"Client ID"`
+	ClientSecret  string `json:"client_secret" required:"true" label:"Client Secret"`
+	PrivateKey    string `json:"private_key"`
+	UID           uint64 `json:"uid" type:"number"`
+	ValidDuration int64  `json:"valid_duration" type:"number" default:"30" help:"minutes"`
 }
 
 var config = driver.Config{

drivers/123_open/sign.go

@@ -0,0 +1,27 @@
+package _123Open
+
+import (
+	"crypto/md5"
+	"fmt"
+	"math/rand"
+	"net/url"
+	"time"
+)
+
+func SignURL(originURL, privateKey string, uid uint64, validDuration time.Duration) (string, error) {
+	if privateKey == "" {
+		return originURL, nil
+	}
+	parsed, err := url.Parse(originURL)
+	if err != nil {
+		return "", err
+	}
+	ts := time.Now().Add(validDuration).Unix()
+	randInt := rand.Int()
+	signature := fmt.Sprintf("%d-%d-%d-%x", ts, randInt, uid, md5.Sum([]byte(fmt.Sprintf("%s-%d-%d-%d-%s",
+		parsed.Path, ts, randInt, uid, privateKey))))
+	query := parsed.Query()
+	query.Add("auth_key", signature)
+	parsed.RawQuery = query.Encode()
+	return parsed.String(), nil
+}