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Ensure responses are context.ResponseWriters (#19843) (#19859) 

* Ensure responses are context.ResponseWriters (#19843)

Backport #19843

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>

* fix test

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
This commit is contained in:
zeripath 2022-06-03 22:38:29 +01:00 committed by GitHub
parent cf6694e815
commit daf14b275a
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 20 deletions
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42
modules/web/route.go
View File

@ -42,11 +42,17 @@ func Wrap(handlers ...interface{}) http.HandlerFunc {
handler := handlers[i]
switch t := handler.(type) {
case http.HandlerFunc:
if _, ok := resp.(context.ResponseWriter); !ok {
resp = context.NewResponse(resp)
}
t(resp, req)
if r, ok := resp.(context.ResponseWriter); ok && r.Status() > 0 {
return
}
case func(http.ResponseWriter, *http.Request):
if _, ok := resp.(context.ResponseWriter); !ok {
resp = context.NewResponse(resp)
}
t(resp, req)
if r, ok := resp.(context.ResponseWriter); ok && r.Status() > 0 {
return
@ -88,7 +94,7 @@ func Wrap(handlers ...interface{}) http.HandlerFunc {
return
}
case func(http.Handler) http.Handler:
var next = http.HandlerFunc(func(http.ResponseWriter, *http.Request) {})
next := http.HandlerFunc(func(http.ResponseWriter, *http.Request) {})
if len(handlers) > i+1 {
next = Wrap(handlers[i+1:]...)
}
@ -148,7 +154,7 @@ func MiddleAPI(f func(ctx *context.APIContext)) func(netx http.Handler) http.Han
// Bind binding an obj to a handler
func Bind(obj interface{}) http.HandlerFunc {
var tp = reflect.TypeOf(obj)
tp := reflect.TypeOf(obj)
if tp.Kind() == reflect.Ptr {
tp = tp.Elem()
}
@ -156,7 +162,7 @@ func Bind(obj interface{}) http.HandlerFunc {
panic("Only structs are allowed to bind")
}
return Wrap(func(ctx *context.Context) {
var theObj = reflect.New(tp).Interface() // create a new form obj for every request but not use obj directly
theObj := reflect.New(tp).Interface() // create a new form obj for every request but not use obj directly
binding.Bind(ctx.Req, theObj)
SetForm(ctx, theObj)
middleware.AssignForm(theObj, ctx.Data)
@ -214,8 +220,8 @@ func (r *Route) Use(middlewares ...interface{}) {
// Group mounts a sub-Router along a `pattern` string.
func (r *Route) Group(pattern string, fn func(), middlewares ...interface{}) {
var previousGroupPrefix = r.curGroupPrefix
var previousMiddlewares = r.curMiddlewares
previousGroupPrefix := r.curGroupPrefix
previousMiddlewares := r.curMiddlewares
r.curGroupPrefix += pattern
r.curMiddlewares = append(r.curMiddlewares, middlewares...)
@ -238,7 +244,7 @@ func (r *Route) getPattern(pattern string) string {
// Mount attaches another Route along ./pattern/*
func (r *Route) Mount(pattern string, subR *Route) {
var middlewares = make([]interface{}, len(r.curMiddlewares))
middlewares := make([]interface{}, len(r.curMiddlewares))
copy(middlewares, r.curMiddlewares)
subR.Use(middlewares...)
r.R.Mount(r.getPattern(pattern), subR.R)
@ -246,7 +252,7 @@ func (r *Route) Mount(pattern string, subR *Route) {
// Any delegate requests for all methods
func (r *Route) Any(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.HandleFunc(r.getPattern(pattern), Wrap(middlewares...))
}
@ -254,7 +260,7 @@ func (r *Route) Any(pattern string, h ...interface{}) {
func (r *Route) Route(pattern, methods string, h ...interface{}) {
p := r.getPattern(pattern)
ms := strings.Split(methods, ",")
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
for _, method := range ms {
r.R.MethodFunc(strings.TrimSpace(method), p, Wrap(middlewares...))
}
@ -262,12 +268,12 @@ func (r *Route) Route(pattern, methods string, h ...interface{}) {
// Delete delegate delete method
func (r *Route) Delete(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Delete(r.getPattern(pattern), Wrap(middlewares...))
}
func (r *Route) getMiddlewares(h []interface{}) []interface{} {
var middlewares = make([]interface{}, len(r.curMiddlewares), len(r.curMiddlewares)+len(h))
middlewares := make([]interface{}, len(r.curMiddlewares), len(r.curMiddlewares)+len(h))
copy(middlewares, r.curMiddlewares)
middlewares = append(middlewares, h...)
return middlewares
@ -275,51 +281,51 @@ func (r *Route) getMiddlewares(h []interface{}) []interface{} {
// Get delegate get method
func (r *Route) Get(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Get(r.getPattern(pattern), Wrap(middlewares...))
}
// Options delegate options method
func (r *Route) Options(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Options(r.getPattern(pattern), Wrap(middlewares...))
}
// GetOptions delegate get and options method
func (r *Route) GetOptions(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Get(r.getPattern(pattern), Wrap(middlewares...))
r.R.Options(r.getPattern(pattern), Wrap(middlewares...))
}
// PostOptions delegate post and options method
func (r *Route) PostOptions(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Post(r.getPattern(pattern), Wrap(middlewares...))
r.R.Options(r.getPattern(pattern), Wrap(middlewares...))
}
// Head delegate head method
func (r *Route) Head(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Head(r.getPattern(pattern), Wrap(middlewares...))
}
// Post delegate post method
func (r *Route) Post(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Post(r.getPattern(pattern), Wrap(middlewares...))
}
// Put delegate put method
func (r *Route) Put(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Put(r.getPattern(pattern), Wrap(middlewares...))
}
// Patch delegate patch method
func (r *Route) Patch(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
middlewares := r.getMiddlewares(h)
r.R.Patch(r.getPattern(pattern), Wrap(middlewares...))
}

5
modules/web/route_test.go
View File

@ -53,6 +53,7 @@ func TestRoute2(t *testing.T) {
tp := chi.URLParam(req, "type")
assert.EqualValues(t, "issues", tp)
route = 0
resp.WriteHeader(200)
})
r.Get("/{type:issues|pulls}/{index}", func(resp http.ResponseWriter, req *http.Request) {
@ -65,9 +66,8 @@ func TestRoute2(t *testing.T) {
index := chi.URLParam(req, "index")
assert.EqualValues(t, "1", index)
route = 1
resp.WriteHeader(200)
})
}, func(resp http.ResponseWriter, req *http.Request) {
resp.WriteHeader(200)
})
r.Group("/issues/{index}", func() {
@ -79,6 +79,7 @@ func TestRoute2(t *testing.T) {
index := chi.URLParam(req, "index")
assert.EqualValues(t, "1", index)
route = 2
resp.WriteHeader(200)
})
})
})