fix(httplib): prevent leaking localhost:3000 in public links (#39217)

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/common/middleware.go

@@ -87,19 +87,8 @@ func RequestContextHandler() func(h http.Handler) http.Handler {
 				}
 			}()
 
-			ds := reqctx.GetRequestDataStore(ctx)
-			req = req.WithContext(cache.WithCacheContext(ctx))
-			ds.SetContextValue(httplib.RequestContextKey, req)
-			ds.AddCleanUp(func() {
-				// TODO: GOLANG-HTTP-TMPDIR: Golang saves the uploaded files to temp directory (TMPDIR) when parsing multipart-form.
-				// The "req" might have changed due to the new "req.WithContext" calls
-				// For example: in NewBaseContext, a new "req" with context is created, and the multipart-form is parsed there.
-				// So we always use the latest "req" from the data store.
-				ctxReq := ds.GetContextValue(httplib.RequestContextKey).(*http.Request) //nolint:forcetypeassert // must be valid
-				if ctxReq.MultipartForm != nil {
-					_ = ctxReq.MultipartForm.RemoveAll() // remove the temp files buffered to tmp directory
-				}
-			})
+			ctx = cache.WithCacheContext(req.Context())
+			req = httplib.RequestWithContext(req, reqctx.FromContext(ctx))
 			next.ServeHTTP(respWriter, req)
 		})
 	}