Call MultipartForm.RemoveAll when request finishes (#19606) (#19607)

modules/context/api.go

@@ -288,6 +288,7 @@ func APIContexter() func(http.Handler) http.Handler {
 				},
 				Org: &APIOrganization{},
 			}
+			defer ctx.Close()
 
 			ctx.Req = WithAPIContext(WithContext(req, ctx.Context), &ctx)
 			ctx.csrf = Csrfer(csrfOpts, ctx.Context)

modules/context/context.go

@@ -71,6 +71,16 @@ type Context struct {
 	Org  *Organization
 }
 
+// Close frees all resources hold by Context
+func (ctx *Context) Close() error {
+	var err error
+	if ctx.Req != nil && ctx.Req.MultipartForm != nil {
+		err = ctx.Req.MultipartForm.RemoveAll() // remove the temp files buffered to tmp directory
+	}
+	// TODO: close opened repo, and more
+	return err
+}
+
 // TrHTMLEscapeArgs runs Tr but pre-escapes all arguments with html.EscapeString.
 // This is useful if the locale message is intended to only produce HTML content.
 func (ctx *Context) TrHTMLEscapeArgs(msg string, args ...string) string {
@@ -643,6 +653,8 @@ func Contexter() func(next http.Handler) http.Handler {
 					"RunModeIsProd": setting.IsProd,
 				},
 			}
+			defer ctx.Close()
+
 			// PageData is passed by reference, and it will be rendered to `window.config.pageData` in `head.tmpl` for JavaScript modules
 			ctx.PageData = map[string]interface{}{}
 			ctx.Data["PageData"] = ctx.PageData

modules/context/private.go

@@ -38,6 +38,8 @@ func PrivateContexter() func(http.Handler) http.Handler {
 					Data: map[string]interface{}{},
 				},
 			}
+			defer ctx.Close()
+
 			ctx.Req = WithPrivateContext(req, ctx)
 			next.ServeHTTP(ctx.Resp, ctx.Req)
 		})