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gitea/modules/web/route.go
wxiaoguang b41925cee3
Refactor CORS handler (#28587)
The CORS code has been unmaintained for long time, and the behavior is
not correct.

This PR tries to improve it. The key point is written as comment in
code. And add more tests.

Fix #28515
Fix #27642
Fix #17098
2023-12-25 20:13:18 +08:00

211 lines
5.4 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package web
import (
"net/http"
"strings"
"code.gitea.io/gitea/modules/web/middleware"
"gitea.com/go-chi/binding"
"github.com/go-chi/chi/v5"
)
// Bind binding an obj to a handler's context data
func Bind[T any](_ T) http.HandlerFunc {
return func(resp http.ResponseWriter, req *http.Request) {
theObj := new(T) // create a new form obj for every request but not use obj directly
data := middleware.GetContextData(req.Context())
binding.Bind(req, theObj)
SetForm(data, theObj)
middleware.AssignForm(theObj, data)
}
}
// SetForm set the form object
func SetForm(dataStore middleware.ContextDataStore, obj any) {
dataStore.GetData()["__form"] = obj
}
// GetForm returns the validate form information
func GetForm(dataStore middleware.ContextDataStore) any {
return dataStore.GetData()["__form"]
}
// Route defines a route based on chi's router
type Route struct {
R chi.Router
curGroupPrefix string
curMiddlewares []any
}
// NewRoute creates a new route
func NewRoute() *Route {
r := chi.NewRouter()
return &Route{R: r}
}
// Use supports two middlewares
func (r *Route) Use(middlewares ...any) {
for _, m := range middlewares {
if m != nil {
r.R.Use(toHandlerProvider(m))
}
}
}
// Group mounts a sub-Router along a `pattern` string.
func (r *Route) Group(pattern string, fn func(), middlewares ...any) {
previousGroupPrefix := r.curGroupPrefix
previousMiddlewares := r.curMiddlewares
r.curGroupPrefix += pattern
r.curMiddlewares = append(r.curMiddlewares, middlewares...)
fn()
r.curGroupPrefix = previousGroupPrefix
r.curMiddlewares = previousMiddlewares
}
func (r *Route) getPattern(pattern string) string {
newPattern := r.curGroupPrefix + pattern
if !strings.HasPrefix(newPattern, "/") {
newPattern = "/" + newPattern
}
if newPattern == "/" {
return newPattern
}
return strings.TrimSuffix(newPattern, "/")
}
func (r *Route) wrapMiddlewareAndHandler(h []any) ([]func(http.Handler) http.Handler, http.HandlerFunc) {
handlerProviders := make([]func(http.Handler) http.Handler, 0, len(r.curMiddlewares)+len(h)+1)
for _, m := range r.curMiddlewares {
if m != nil {
handlerProviders = append(handlerProviders, toHandlerProvider(m))
}
}
for _, m := range h {
if h != nil {
handlerProviders = append(handlerProviders, toHandlerProvider(m))
}
}
middlewares := handlerProviders[:len(handlerProviders)-1]
handlerFunc := handlerProviders[len(handlerProviders)-1](nil).ServeHTTP
mockPoint := RouteMockPoint(MockAfterMiddlewares)
if mockPoint != nil {
middlewares = append(middlewares, mockPoint)
}
return middlewares, handlerFunc
}
// Methods adds the same handlers for multiple http "methods" (separated by ",").
// If any method is invalid, the lower level router will panic.
func (r *Route) Methods(methods, pattern string, h ...any) {
middlewares, handlerFunc := r.wrapMiddlewareAndHandler(h)
fullPattern := r.getPattern(pattern)
if strings.Contains(methods, ",") {
methods := strings.Split(methods, ",")
for _, method := range methods {
r.R.With(middlewares...).Method(strings.TrimSpace(method), fullPattern, handlerFunc)
}
} else {
r.R.With(middlewares...).Method(methods, fullPattern, handlerFunc)
}
}
// Mount attaches another Route along ./pattern/*
func (r *Route) Mount(pattern string, subR *Route) {
subR.Use(r.curMiddlewares...)
r.R.Mount(r.getPattern(pattern), subR.R)
}
// Any delegate requests for all methods
func (r *Route) Any(pattern string, h ...any) {
middlewares, handlerFunc := r.wrapMiddlewareAndHandler(h)
r.R.With(middlewares...).HandleFunc(r.getPattern(pattern), handlerFunc)
}
// Delete delegate delete method
func (r *Route) Delete(pattern string, h ...any) {
r.Methods("DELETE", pattern, h...)
}
// Get delegate get method
func (r *Route) Get(pattern string, h ...any) {
r.Methods("GET", pattern, h...)
}
// Head delegate head method
func (r *Route) Head(pattern string, h ...any) {
r.Methods("HEAD", pattern, h...)
}
// Post delegate post method
func (r *Route) Post(pattern string, h ...any) {
r.Methods("POST", pattern, h...)
}
// Put delegate put method
func (r *Route) Put(pattern string, h ...any) {
r.Methods("PUT", pattern, h...)
}
// Patch delegate patch method
func (r *Route) Patch(pattern string, h ...any) {
r.Methods("PATCH", pattern, h...)
}
// ServeHTTP implements http.Handler
func (r *Route) ServeHTTP(w http.ResponseWriter, req *http.Request) {
r.R.ServeHTTP(w, req)
}
// NotFound defines a handler to respond whenever a route could not be found.
func (r *Route) NotFound(h http.HandlerFunc) {
r.R.NotFound(h)
}
// Combo delegates requests to Combo
func (r *Route) Combo(pattern string, h ...any) *Combo {
return &Combo{r, pattern, h}
}
// Combo represents a tiny group routes with same pattern
type Combo struct {
r *Route
pattern string
h []any
}
// Get delegates Get method
func (c *Combo) Get(h ...any) *Combo {
c.r.Get(c.pattern, append(c.h, h...)...)
return c
}
// Post delegates Post method
func (c *Combo) Post(h ...any) *Combo {
c.r.Post(c.pattern, append(c.h, h...)...)
return c
}
// Delete delegates Delete method
func (c *Combo) Delete(h ...any) *Combo {
c.r.Delete(c.pattern, append(c.h, h...)...)
return c
}
// Put delegates Put method
func (c *Combo) Put(h ...any) *Combo {
c.r.Put(c.pattern, append(c.h, h...)...)
return c
}
// Patch delegates Patch method
func (c *Combo) Patch(h ...any) *Combo {
c.r.Patch(c.pattern, append(c.h, h...)...)
return c
}