added PostJSON

Author: vyrus001

engine/engine.go

@@ -85,6 +85,7 @@ func (e *Engine) CreateVM() {
 	e.VM.Set("Matches", e.VMMatches)
 	e.VM.Set("CanSSHLogin", e.VMCanSSHLogin)
 	e.VM.Set("RetrieveFileFromURL", e.VMRetrieveFileFromURL)
+	e.VM.Set("PostJSON", e.VMPostJSON)
 	e.VM.Set("DNSQuery", e.VMDNSQuery)
 	e.VM.Set("HTTPRequest", e.VMHTTPRequest)
 	e.VM.Set("Exec", e.VMExec)

engine/net.go

@@ -1,6 +1,8 @@
 package engine
 
 import (
+	"bytes"
+	"encoding/json"
 	"io/ioutil"
 	"net"
 	"net/http"
@@ -82,6 +84,26 @@ func HTTPGetFile(url string) (int, []byte, error) {
 	return respCode, pageData, nil
 }
 
+func PostJSON(url string, jsonString []byte) (int, []byte, error) {
+	// encode json to sanity check, then decode to ensure the transmition syntax is clean
+	var jsonObj interface{}
+	if err := json.Unmarshal(jsonString, &jsonObj); err != nil {
+		return 0, nil, err
+	}
+	jsonStringCleaned, err := json.Marshal(jsonObj)
+	if err != nil {
+		return 0, nil, err
+	}
+	resp, err := http.Post(url, " application/json", bytes.NewReader(jsonStringCleaned))
+	if err != nil {
+		return 0, nil, err
+	}
+	respCode := resp.StatusCode
+	pageData, err := ioutil.ReadAll(resp.Body)
+	resp.Body.Close()
+	return respCode, pageData, nil
+}
+
 func TCPRead(ip, port string) ([]byte, error) {
 	host := ip + ":" + port
 	conn, err := net.Dial("tcp", host)