refactor: split the relay controller

controller/relay-image.go

@@ -0,0 +1,34 @@
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+	"io"
+	"net/http"
+)
+
+func relayImageHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
+	// TODO: this part is not finished
+	req, err := http.NewRequest(c.Request.Method, c.Request.RequestURI, c.Request.Body)
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return errorWrapper(err, "do_request_failed", http.StatusOK)
+	}
+	err = req.Body.Close()
+	if err != nil {
+		return errorWrapper(err, "close_request_body_failed", http.StatusOK)
+	}
+	for k, v := range resp.Header {
+		c.Writer.Header().Set(k, v[0])
+	}
+	c.Writer.WriteHeader(resp.StatusCode)
+	_, err = io.Copy(c.Writer, resp.Body)
+	if err != nil {
+		return errorWrapper(err, "copy_response_body_failed", http.StatusOK)
+	}
+	err = resp.Body.Close()
+	if err != nil {
+		return errorWrapper(err, "close_response_body_failed", http.StatusOK)
+	}
+	return nil
+}