Dechunk HTTP requests by default (#11)

ProxyManager already has all the Request body's data. There is no never
a need to use chunked transfer encoding to the upstream process.

proxy/process.go

@@ -178,7 +178,7 @@ func (p *Process) ProxyRequest(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
-	req.Header = r.Header
+	req.Header = r.Header.Clone()
 	resp, err := client.Do(req)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusBadGateway)

proxy/proxymanager.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"strconv"
 	"sync"
 	"time"
 
@@ -121,6 +122,11 @@ func (pm *ProxyManager) proxyChatRequestHandler(c *gin.Context) {
 	}
 
 	c.Request.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
+
+	// dechunk it as we already have all the body bytes see issue #11
+	c.Request.Header.Del("transfer-encoding")
+	c.Request.Header.Add("content-length", strconv.Itoa(len(bodyBytes)))
+
 	pm.currentProcess.ProxyRequest(c.Writer, c.Request)
 }