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server_adapter_go.go
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server_adapter_go.go
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package revel
import (
"net"
"net/http"
"time"
"golang.org/x/net/websocket"
"io"
"mime/multipart"
"net/url"
"strconv"
)
// Register the GoHttpServer engine
func init() {
RegisterServerEngine(GO_NATIVE_SERVER_ENGINE, func() ServerEngine { return &GoHttpServer{} })
}
type GoHttpServer struct {
Server *http.Server
ServerInit *EngineInit
MaxMultipartSize int64
goContextStack *SimpleLockStack
goMultipartFormStack *SimpleLockStack
}
func (g *GoHttpServer) Init(init *EngineInit) {
g.MaxMultipartSize = int64(Config.IntDefault("server.request.max.multipart.filesize", 32)) << 20 /* 32 MB */
g.goContextStack = NewStackLock(Config.IntDefault("server.context.stack", 100),
Config.IntDefault("server.context.maxstack", 200),
func() interface{} {
return NewGoContext(g)
})
g.goMultipartFormStack = NewStackLock(Config.IntDefault("server.form.stack", 100),
Config.IntDefault("server.form.maxstack", 200),
func() interface{} { return &GoMultipartForm{} })
g.ServerInit = init
g.Server = &http.Server{
Addr: init.Address,
Handler: http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
g.Handle(writer, request)
}),
ReadTimeout: time.Duration(Config.IntDefault("http.timeout.read", 0)) * time.Second,
WriteTimeout: time.Duration(Config.IntDefault("http.timeout.write", 0)) * time.Second,
}
// Server already initialized
}
// Handler is assigned in the Init
func (g *GoHttpServer) Start() {
go func() {
time.Sleep(100 * time.Millisecond)
serverLogger.Debugf("Start: Listening on %s...", g.Server.Addr)
}()
if HTTPSsl {
if g.ServerInit.Network != "tcp" {
// This limitation is just to reduce complexity, since it is standard
// to terminate SSL upstream when using unix domain sockets.
serverLogger.Fatal("SSL is only supported for TCP sockets. Specify a port to listen on.")
}
serverLogger.Fatal("Failed to listen:", "error",
g.Server.ListenAndServeTLS(HTTPSslCert, HTTPSslKey))
} else {
listener, err := net.Listen(g.ServerInit.Network, g.Server.Addr)
if err != nil {
serverLogger.Fatal("Failed to listen:", "error", err)
}
serverLogger.Fatal("Failed to serve:", "error", g.Server.Serve(listener))
}
}
func (g *GoHttpServer) Handle(w http.ResponseWriter, r *http.Request) {
if maxRequestSize := int64(Config.IntDefault("http.maxrequestsize", 0)); maxRequestSize > 0 {
r.Body = http.MaxBytesReader(w, r.Body, maxRequestSize)
}
upgrade := r.Header.Get("Upgrade")
context := g.goContextStack.Pop().(*GoContext)
defer func() {
g.goContextStack.Push(context)
}()
context.Request.SetRequest(r)
context.Response.SetResponse(w)
if upgrade == "websocket" || upgrade == "Websocket" {
websocket.Handler(func(ws *websocket.Conn) {
//Override default Read/Write timeout with sane value for a web socket request
if err := ws.SetDeadline(time.Now().Add(time.Hour * 24)); err != nil {
serverLogger.Error("SetDeadLine failed:", err)
}
r.Method = "WS"
context.Request.WebSocket = ws
context.WebSocket = &GoWebSocket{Conn: ws, GoResponse: *context.Response}
g.ServerInit.Callback(context)
}).ServeHTTP(w, r)
} else {
g.ServerInit.Callback(context)
}
}
const GO_NATIVE_SERVER_ENGINE = "go"
func (g *GoHttpServer) Name() string {
return GO_NATIVE_SERVER_ENGINE
}
func (g *GoHttpServer) Stats() map[string]interface{} {
return map[string]interface{}{
"Go Engine Context": g.goContextStack.String(),
"Go Engine Forms": g.goMultipartFormStack.String(),
}
}
func (g *GoHttpServer) Engine() interface{} {
return g.Server
}
func (g *GoHttpServer) Event(event int, args interface{}) {
}
type (
GoContext struct {
Request *GoRequest
Response *GoResponse
WebSocket *GoWebSocket
}
GoRequest struct {
Original *http.Request
FormParsed bool
MultiFormParsed bool
WebSocket *websocket.Conn
ParsedForm *GoMultipartForm
Goheader *GoHeader
Engine *GoHttpServer
}
GoResponse struct {
Original http.ResponseWriter
Goheader *GoHeader
Writer io.Writer
Request *GoRequest
Engine *GoHttpServer
}
GoMultipartForm struct {
Form *multipart.Form
}
GoHeader struct {
Source interface{}
isResponse bool
}
GoWebSocket struct {
Conn *websocket.Conn
GoResponse
}
GoCookie http.Cookie
)
func NewGoContext(instance *GoHttpServer) *GoContext {
if instance == nil {
instance = &GoHttpServer{MaxMultipartSize: 32 << 20}
instance.goContextStack = NewStackLock(100, 200,
func() interface{} {
return NewGoContext(instance)
})
instance.goMultipartFormStack = NewStackLock(100, 200,
func() interface{} { return &GoMultipartForm{} })
}
c := &GoContext{Request: &GoRequest{Goheader: &GoHeader{}, Engine: instance}}
c.Response = &GoResponse{Goheader: &GoHeader{}, Request: c.Request, Engine: instance}
return c
}
func (c *GoContext) GetRequest() ServerRequest {
return c.Request
}
func (c *GoContext) GetResponse() ServerResponse {
if c.WebSocket != nil {
return c.WebSocket
}
return c.Response
}
func (c *GoContext) Destroy() {
c.Response.Destroy()
c.Request.Destroy()
if c.WebSocket != nil {
c.WebSocket.Destroy()
c.WebSocket = nil
}
}
func (r *GoRequest) Get(key int) (value interface{}, err error) {
switch key {
case HTTP_SERVER_HEADER:
value = r.GetHeader()
case HTTP_MULTIPART_FORM:
value, err = r.GetMultipartForm()
case HTTP_QUERY:
value = r.Original.URL.Query()
case HTTP_FORM:
value, err = r.GetForm()
case HTTP_REQUEST_URI:
value = r.Original.URL.String()
case HTTP_REMOTE_ADDR:
value = r.Original.RemoteAddr
case HTTP_METHOD:
value = r.Original.Method
case HTTP_PATH:
value = r.Original.URL.Path
case HTTP_HOST:
value = r.Original.Host
case HTTP_URL:
value = r.Original.URL
case HTTP_BODY:
value = r.Original.Body
default:
err = ENGINE_UNKNOWN_GET
}
return
}
func (r *GoRequest) Set(key int, value interface{}) bool {
return false
}
func (r *GoRequest) GetForm() (url.Values, error) {
if !r.FormParsed {
if e := r.Original.ParseForm(); e != nil {
return nil, e
}
r.FormParsed = true
}
return r.Original.Form, nil
}
func (r *GoRequest) GetMultipartForm() (ServerMultipartForm, error) {
if !r.MultiFormParsed {
if e := r.Original.ParseMultipartForm(r.Engine.MaxMultipartSize); e != nil {
return nil, e
}
r.ParsedForm = r.Engine.goMultipartFormStack.Pop().(*GoMultipartForm)
r.ParsedForm.Form = r.Original.MultipartForm
}
return r.ParsedForm, nil
}
func (r *GoRequest) GetHeader() ServerHeader {
return r.Goheader
}
func (r *GoRequest) GetRaw() interface{} {
return r.Original
}
func (r *GoRequest) SetRequest(req *http.Request) {
r.Original = req
r.Goheader.Source = r
r.Goheader.isResponse = false
}
func (r *GoRequest) Destroy() {
r.Goheader.Source = nil
r.Original = nil
r.FormParsed = false
r.MultiFormParsed = false
r.ParsedForm = nil
}
func (r *GoResponse) Get(key int) (value interface{}, err error) {
switch key {
case HTTP_SERVER_HEADER:
value = r.Header()
case HTTP_STREAM_WRITER:
value = r
case HTTP_WRITER:
value = r.Writer
default:
err = ENGINE_UNKNOWN_GET
}
return
}
func (r *GoResponse) Set(key int, value interface{}) (set bool) {
switch key {
case ENGINE_RESPONSE_STATUS:
r.Header().SetStatus(value.(int))
set = true
case HTTP_WRITER:
r.SetWriter(value.(io.Writer))
set = true
}
return
}
func (r *GoResponse) Header() ServerHeader {
return r.Goheader
}
func (r *GoResponse) GetRaw() interface{} {
return r.Original
}
func (r *GoResponse) SetWriter(writer io.Writer) {
r.Writer = writer
}
func (r *GoResponse) WriteStream(name string, contentlen int64, modtime time.Time, reader io.Reader) error {
// Check to see if the output stream is modified, if not send it using the
// Native writer
written := false
if _, ok := r.Writer.(http.ResponseWriter); ok {
if rs, ok := reader.(io.ReadSeeker); ok {
http.ServeContent(r.Original, r.Request.Original, name, modtime, rs)
written = true
}
}
if !written {
// Else, do a simple io.Copy.
ius := r.Request.Original.Header.Get("If-Unmodified-Since")
if t, err := http.ParseTime(ius); err == nil && !modtime.IsZero() {
// The Date-Modified header truncates sub-second precision, so
// use mtime < t+1s instead of mtime <= t to check for unmodified.
if modtime.Before(t.Add(1 * time.Second)) {
h := r.Original.Header()
delete(h, "Content-Type")
delete(h, "Content-Length")
if h.Get("Etag") != "" {
delete(h, "Last-Modified")
}
r.Original.WriteHeader(http.StatusNotModified)
return nil
}
}
if contentlen != -1 {
header := ServerHeader(r.Goheader)
if writer,found := r.Writer.(*CompressResponseWriter);found {
header = ServerHeader(writer.Header)
}
header.Set("Content-Length", strconv.FormatInt(contentlen, 10))
}
if _, err := io.Copy(r.Writer, reader); err != nil {
r.Original.WriteHeader(http.StatusInternalServerError)
return err
} else {
r.Original.WriteHeader(http.StatusOK)
}
}
return nil
}
func (r *GoResponse) Destroy() {
if c, ok := r.Writer.(io.Closer); ok {
c.Close()
}
r.Goheader.Source = nil
r.Original = nil
r.Writer = nil
}
func (r *GoResponse) SetResponse(w http.ResponseWriter) {
r.Original = w
r.Writer = w
r.Goheader.Source = r
r.Goheader.isResponse = true
}
func (r *GoHeader) SetCookie(cookie string) {
if r.isResponse {
r.Source.(*GoResponse).Original.Header().Add("Set-Cookie", cookie)
}
}
func (r *GoHeader) GetCookie(key string) (value ServerCookie, err error) {
if !r.isResponse {
var cookie *http.Cookie
if cookie, err = r.Source.(*GoRequest).Original.Cookie(key); err == nil {
value = GoCookie(*cookie)
}
}
return
}
func (r *GoHeader) Set(key string, value string) {
if r.isResponse {
r.Source.(*GoResponse).Original.Header().Set(key, value)
}
}
func (r *GoHeader) Add(key string, value string) {
if r.isResponse {
r.Source.(*GoResponse).Original.Header().Add(key, value)
}
}
func (r *GoHeader) Del(key string) {
if r.isResponse {
r.Source.(*GoResponse).Original.Header().Del(key)
}
}
func (r *GoHeader) Get(key string) (value []string) {
if !r.isResponse {
value = r.Source.(*GoRequest).Original.Header[key]
if len(value) == 0 {
if ihead := r.Source.(*GoRequest).Original.Header.Get(key); ihead != "" {
value = append(value, ihead)
}
}
} else {
value = r.Source.(*GoResponse).Original.Header()[key]
}
return
}
func (r *GoHeader) SetStatus(statusCode int) {
if r.isResponse {
r.Source.(*GoResponse).Original.WriteHeader(statusCode)
}
}
func (r GoCookie) GetValue() string {
return r.Value
}
func (f *GoMultipartForm) GetFiles() map[string][]*multipart.FileHeader {
return f.Form.File
}
func (f *GoMultipartForm) GetValues() url.Values {
return url.Values(f.Form.Value)
}
func (f *GoMultipartForm) RemoveAll() error {
return f.Form.RemoveAll()
}
func (g *GoWebSocket) MessageSendJSON(v interface{}) error {
return websocket.JSON.Send(g.Conn, v)
}
func (g *GoWebSocket) MessageReceiveJSON(v interface{}) error {
return websocket.JSON.Receive(g.Conn, v)
}