gin/gin.go
2014-10-09 01:40:42 +02:00

142 lines
3.6 KiB
Go

// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
package gin
import (
"github.com/gin-gonic/gin/render"
"github.com/julienschmidt/httprouter"
"html/template"
"math"
"net/http"
"sync"
)
const (
AbortIndex = math.MaxInt8 / 2
MIMEJSON = "application/json"
MIMEHTML = "text/html"
MIMEXML = "application/xml"
MIMEXML2 = "text/xml"
MIMEPlain = "text/plain"
MIMEPOSTForm = "application/x-www-form-urlencoded"
)
type (
HandlerFunc func(*Context)
// Represents the web framework, it wraps the blazing fast httprouter multiplexer and a list of global middlewares.
Engine struct {
*RouterGroup
HTMLRender render.Render
Default404Body []byte
pool sync.Pool
allNoRoute []HandlerFunc
noRoute []HandlerFunc
router *httprouter.Router
}
)
// Returns a new blank Engine instance without any middleware attached.
// The most basic configuration
func New() *Engine {
engine := &Engine{}
engine.RouterGroup = &RouterGroup{
Handlers: nil,
absolutePath: "/",
engine: engine,
}
engine.router = httprouter.New()
engine.Default404Body = []byte("404 page not found")
engine.router.NotFound = engine.handle404
engine.pool.New = func() interface{} {
c := &Context{Engine: engine}
c.Writer = &c.writermem
return c
}
return engine
}
// Returns a Engine instance with the Logger and Recovery already attached.
func Default() *Engine {
engine := New()
engine.Use(Recovery(), Logger())
return engine
}
func (engine *Engine) LoadHTMLGlob(pattern string) {
if IsDebugging() {
render.HTMLDebug.AddGlob(pattern)
engine.HTMLRender = render.HTMLDebug
} else {
templ := template.Must(template.ParseGlob(pattern))
engine.SetHTMLTemplate(templ)
}
}
func (engine *Engine) LoadHTMLFiles(files ...string) {
if IsDebugging() {
render.HTMLDebug.AddFiles(files...)
engine.HTMLRender = render.HTMLDebug
} else {
templ := template.Must(template.ParseFiles(files...))
engine.SetHTMLTemplate(templ)
}
}
func (engine *Engine) SetHTMLTemplate(templ *template.Template) {
engine.HTMLRender = render.HTMLRender{
Template: templ,
}
}
// Adds handlers for NoRoute. It return a 404 code by default.
func (engine *Engine) NoRoute(handlers ...HandlerFunc) {
engine.noRoute = handlers
engine.rebuild404Handlers()
}
func (engine *Engine) Use(middlewares ...HandlerFunc) {
engine.RouterGroup.Use(middlewares...)
engine.rebuild404Handlers()
}
func (engine *Engine) rebuild404Handlers() {
engine.allNoRoute = engine.combineHandlers(engine.noRoute)
}
func (engine *Engine) handle404(w http.ResponseWriter, req *http.Request) {
c := engine.createContext(w, req, nil, engine.allNoRoute)
// set 404 by default, useful for logging
c.Writer.WriteHeader(404)
c.Next()
if !c.Writer.Written() {
if c.Writer.Status() == 404 {
c.Data(-1, MIMEPlain, engine.Default404Body)
} else {
c.Writer.WriteHeaderNow()
}
}
engine.reuseContext(c)
}
// ServeHTTP makes the router implement the http.Handler interface.
func (engine *Engine) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
engine.router.ServeHTTP(writer, request)
}
func (engine *Engine) Run(addr string) {
debugPrint("Listening and serving HTTP on %s", addr)
if err := http.ListenAndServe(addr, engine); err != nil {
panic(err)
}
}
func (engine *Engine) RunTLS(addr string, cert string, key string) {
debugPrint("Listening and serving HTTPS on %s", addr)
if err := http.ListenAndServeTLS(addr, cert, key, engine); err != nil {
panic(err)
}
}