A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package web
import (
goctx "context"
"fmt"
"net/http"
"reflect"
"strings"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/web/middleware"
"gitea.com/go-chi/binding"
"github.com/go-chi/chi"
)
// Wrap converts all kinds of routes to standard library one
func Wrap(handlers ...interface{}) http.HandlerFunc {
if len(handlers) == 0 {
panic("No handlers found")
}
for _, handler := range handlers {
switch t := handler.(type) {
case http.HandlerFunc, func(http.ResponseWriter, *http.Request),
func(ctx *context.Context),
func(ctx *context.Context) goctx.CancelFunc,
func(*context.APIContext),
func(*context.PrivateContext),
func(http.Handler) http.Handler:
default:
panic(fmt.Sprintf("Unsupported handler type: %#v", t))
}
}
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
for i := 0; i < len(handlers); i++ {
handler := handlers[i]
switch t := handler.(type) {
case http.HandlerFunc:
t(resp, req)
if r, ok := resp.(context.ResponseWriter); ok && r.Status() > 0 {
return
}
case func(http.ResponseWriter, *http.Request):
t(resp, req)
if r, ok := resp.(context.ResponseWriter); ok && r.Status() > 0 {
return
}
case func(ctx *context.Context) goctx.CancelFunc:
ctx := context.GetContext(req)
cancel := t(ctx)
if cancel != nil {
defer cancel()
}
if ctx.Written() {
return
}
case func(ctx *context.Context):
ctx := context.GetContext(req)
t(ctx)
if ctx.Written() {
return
}
case func(*context.APIContext):
ctx := context.GetAPIContext(req)
t(ctx)
if ctx.Written() {
return
}
case func(*context.PrivateContext):
ctx := context.GetPrivateContext(req)
t(ctx)
if ctx.Written() {
return
}
case func(http.Handler) http.Handler:
var next = http.HandlerFunc(func(http.ResponseWriter, *http.Request) {})
if len(handlers) > i+1 {
next = Wrap(handlers[i+1:]...)
}
t(next).ServeHTTP(resp, req)
return
default:
panic(fmt.Sprintf("Unsupported handler type: %#v", t))
}
}
})
}
// Middle wrap a context function as a chi middleware
func Middle(f func(ctx *context.Context)) func(netx http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
ctx := context.GetContext(req)
f(ctx)
if ctx.Written() {
return
}
next.ServeHTTP(ctx.Resp, ctx.Req)
})
}
}
// MiddleCancel wrap a context function as a chi middleware
func MiddleCancel(f func(ctx *context.Context) goctx.CancelFunc) func(netx http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
ctx := context.GetContext(req)
cancel := f(ctx)
if cancel != nil {
defer cancel()
}
if ctx.Written() {
return
}
next.ServeHTTP(ctx.Resp, ctx.Req)
})
}
}
// MiddleAPI wrap a context function as a chi middleware
func MiddleAPI(f func(ctx *context.APIContext)) func(netx http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
ctx := context.GetAPIContext(req)
f(ctx)
if ctx.Written() {
return
}
next.ServeHTTP(ctx.Resp, ctx.Req)
})
}
}
// Bind binding an obj to a handler
func Bind(obj interface{}) http.HandlerFunc {
var tp = reflect.TypeOf(obj)
if tp.Kind() == reflect.Ptr {
tp = tp.Elem()
}
if tp.Kind() != reflect.Struct {
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
binding.Bind(ctx.Req, theObj)
SetForm(ctx, theObj)
middleware.AssignForm(theObj, ctx.Data)
})
}
// SetForm set the form object
func SetForm(data middleware.DataStore, obj interface{}) {
data.GetData()["__form"] = obj
}
// GetForm returns the validate form information
func GetForm(data middleware.DataStore) interface{} {
return data.GetData()["__form"]
}
// Route defines a route based on chi's router
type Route struct {
R chi.Router
curGroupPrefix string
curMiddlewares []interface{}
}
// NewRoute creates a new route
func NewRoute() *Route {
r := chi.NewRouter()
return &Route{
R: r,
curGroupPrefix: "",
curMiddlewares: []interface{}{},
}
}
// Use supports two middlewares
func (r *Route) Use(middlewares ...interface{}) {
if r.curGroupPrefix != "" {
r.curMiddlewares = append(r.curMiddlewares, middlewares...)
} else {
for _, middle := range middlewares {
switch t := middle.(type) {
case func(http.Handler) http.Handler:
r.R.Use(t)
case func(*context.Context):
r.R.Use(Middle(t))
case func(*context.Context) goctx.CancelFunc:
r.R.Use(MiddleCancel(t))
case func(*context.APIContext):
r.R.Use(MiddleAPI(t))
default:
panic(fmt.Sprintf("Unsupported middleware type: %#v", t))
}
}
}
}
// 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
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, "/")
}
// Mount attaches another Route along ./pattern/*
func (r *Route) Mount(pattern string, subR *Route) {
var middlewares = make([]interface{}, len(r.curMiddlewares))
copy(middlewares, r.curMiddlewares)
subR.Use(middlewares...)
r.R.Mount(r.getPattern(pattern), subR.R)
}
// Any delegate requests for all methods
func (r *Route) Any(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
r.R.HandleFunc(r.getPattern(pattern), Wrap(middlewares...))
}
// Route delegate special methods
func (r *Route) Route(pattern string, methods string, h ...interface{}) {
p := r.getPattern(pattern)
ms := strings.Split(methods, ",")
var middlewares = r.getMiddlewares(h)
for _, method := range ms {
r.R.MethodFunc(strings.TrimSpace(method), p, Wrap(middlewares...))
}
}
// Delete delegate delete method
func (r *Route) Delete(pattern string, h ...interface{}) {
var 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))
copy(middlewares, r.curMiddlewares)
middlewares = append(middlewares, h...)
return middlewares
}
// Get delegate get method
func (r *Route) Get(pattern string, h ...interface{}) {
var middlewares = r.getMiddlewares(h)
r.R.Get(r.getPattern(pattern), Wrap(middlewares...))
}
// Head delegate head method
func (r *Route) Head(pattern string, h ...interface{}) {
var 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)
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)
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)
r.R.Patch(r.getPattern(pattern), Wrap(middlewares...))
}
// 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)
}
// MethodNotAllowed defines a handler to respond whenever a method is
// not allowed.
func (r *Route) MethodNotAllowed(h http.HandlerFunc) {
r.R.MethodNotAllowed(h)
}
// Combo deletegate requests to Combo
func (r *Route) Combo(pattern string, h ...interface{}) *Combo {
return &Combo{r, pattern, h}
}
// Combo represents a tiny group routes with same pattern
type Combo struct {
r *Route
pattern string
h []interface{}
}
// Get deletegate Get method
func (c *Combo) Get(h ...interface{}) *Combo {
c.r.Get(c.pattern, append(c.h, h...)...)
return c
}
// Post deletegate Post method
func (c *Combo) Post(h ...interface{}) *Combo {
c.r.Post(c.pattern, append(c.h, h...)...)
return c
}
// Delete deletegate Delete method
func (c *Combo) Delete(h ...interface{}) *Combo {
c.r.Delete(c.pattern, append(c.h, h...)...)
return c
}
// Put deletegate Put method
func (c *Combo) Put(h ...interface{}) *Combo {
c.r.Put(c.pattern, append(c.h, h...)...)
return c
}
// Patch deletegate Patch method
func (c *Combo) Patch(h ...interface{}) *Combo {
c.r.Patch(c.pattern, append(c.h, h...)...)
return c
}