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730b9a5a62
In order for web.Wrap to be able to detect if a response has been written we need to wrap any non-context.ResponseWriters as a such. Otherwise responses will be incorrectly detected as non-written to and handlers can double run. In the case of GZip this handler will change the response to a non-context.RW and this failure to correctly detect response writing causes fallthrough and a NPE. Fix #19839 Signed-off-by: Andrew Thornton <art27@cantab.net>
111 lines
3.7 KiB
Go
111 lines
3.7 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package web
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import (
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goctx "context"
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"fmt"
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"net/http"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/web/routing"
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)
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type wrappedHandlerFunc func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func())
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func convertHandler(handler interface{}) wrappedHandlerFunc {
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funcInfo := routing.GetFuncInfo(handler)
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switch t := handler.(type) {
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case http.HandlerFunc:
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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if _, ok := resp.(context.ResponseWriter); !ok {
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resp = context.NewResponse(resp)
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}
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t(resp, req)
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if r, ok := resp.(context.ResponseWriter); ok && r.Status() > 0 {
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done = true
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}
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return
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}
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case func(http.ResponseWriter, *http.Request):
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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t(resp, req)
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if r, ok := resp.(context.ResponseWriter); ok && r.Status() > 0 {
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done = true
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}
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return
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}
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case func(ctx *context.Context):
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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ctx := context.GetContext(req)
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t(ctx)
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done = ctx.Written()
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return
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}
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case func(ctx *context.Context) goctx.CancelFunc:
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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ctx := context.GetContext(req)
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deferrable = t(ctx)
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done = ctx.Written()
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return
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}
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case func(*context.APIContext):
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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ctx := context.GetAPIContext(req)
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t(ctx)
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done = ctx.Written()
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return
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}
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case func(*context.APIContext) goctx.CancelFunc:
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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ctx := context.GetAPIContext(req)
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deferrable = t(ctx)
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done = ctx.Written()
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return
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}
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case func(*context.PrivateContext):
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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ctx := context.GetPrivateContext(req)
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t(ctx)
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done = ctx.Written()
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return
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}
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case func(*context.PrivateContext) goctx.CancelFunc:
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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ctx := context.GetPrivateContext(req)
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deferrable = t(ctx)
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done = ctx.Written()
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return
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}
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case func(http.Handler) http.Handler:
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return func(resp http.ResponseWriter, req *http.Request, others ...wrappedHandlerFunc) (done bool, deferrable func()) {
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next := http.HandlerFunc(func(http.ResponseWriter, *http.Request) {})
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if len(others) > 0 {
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next = wrapInternal(others)
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}
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routing.UpdateFuncInfo(req.Context(), funcInfo)
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if _, ok := resp.(context.ResponseWriter); !ok {
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resp = context.NewResponse(resp)
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}
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t(next).ServeHTTP(resp, req)
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if r, ok := resp.(context.ResponseWriter); ok && r.Status() > 0 {
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done = true
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}
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return
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}
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default:
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panic(fmt.Sprintf("Unsupported handler type: %#v", t))
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}
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}
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