examples/go: http handler & http server

examples/go/http_handler.go

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package main
+
+import (
+        "fmt"
+        "log"
+
+        "golang.org/x/mobile/app"
+
+        "mojo/public/go/application"
+        "mojo/public/go/bindings"
+        "mojo/public/go/system"
+
+        "mojo/services/http_server/public/interfaces/http_request"
+        "mojo/services/http_server/public/interfaces/http_response"
+        "mojo/services/http_server/public/interfaces/http_server"
+        "mojo/services/http_server/public/interfaces/http_server_factory"
+        "mojo/services/network/public/interfaces/net_address"
+)
+
+//#include "mojo/public/c/system/types.h"

[jamesr, 2015/04/22 19:21:55]

do we need this just for the main? might be nice to wrap this in a lib since
(again) the Go-NaCl build will need something different. doesn't have to be in
this patch

[rogulenko, 2015/04/22 20:49:14]

Looks like that for this we need to have two .go files: one with android
entry point, one with NaCl entry point and append them to sources based
on target platform.

+import "C"
+
+type HttpHandler struct{}
+
+func (h *HttpHandler) HandleRequest(request http_request.HttpRequest) (http_response.HttpResponse, error) {
+        resp := "Hello, Go http handler!"
+        r, producer, consumer := system.GetCore().CreateDataPipe(&system.DataPipeOptions{
+                system.MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE,
+                1,
+                uint32(len(resp)),
+        })
+        if r != system.MOJO_RESULT_OK {
+                panic(fmt.Sprintf("can't create data pipe: %v", r))
+        }
+
+        producer.WriteData([]byte(resp), system.MOJO_WRITE_DATA_FLAG_ALL_OR_NONE)
+        producer.Close()
+        return http_response.HttpResponse{
+                200,
+                &consumer,
+                int64(len(resp)),
+                "text/html; charset=utf-8",
+                nil,
+        }, nil
+}
+
+type HttpHandlerDelegate struct {
+        server      *http_server.HttpServerProxy
+        handlerStub *bindings.Stub
+}
+
+func (d *HttpHandlerDelegate) Initialize(ctx application.Context) {
+        request, pointer := http_server_factory.CreateMessagePipeForHttpServerFactory()
+        ctx.ConnectToApplication("mojo:http_server").ConnectToService(&request)
+        factory := http_server_factory.NewHttpServerFactoryProxy(pointer, bindings.GetAsyncWaiter())
+
+        addr := &net_address.NetAddress{
+                net_address.NetAddressFamily_IpV4,
+                &net_address.NetAddressIPv4{
+                        8080,
+                        [4]uint8{127, 0, 0, 1},
+                },
+                nil,
+        }
+        serverRequest, serverPointer := http_server.CreateMessagePipeForHttpServer()
+        factory.CreateHttpServer(serverRequest, addr)
+        d.server = http_server.NewHttpServerProxy(serverPointer, bindings.GetAsyncWaiter())
+        handlerRequest, handlerPointer := http_server.CreateMessagePipeForHttpHandler()
+        ok, err := d.server.SetHandler("/go", handlerPointer)
+        if !ok {
+                log.Println("can't set handler:", err)
+                return
+        }
+
+        d.handlerStub = http_server.NewHttpHandlerStub(handlerRequest, &HttpHandler{}, bindings.GetAsyncWaiter())
+        go func() {
+                for {
+                        if err := d.handlerStub.ServeRequest(); err != nil {
+                                log.Println("can't handle http request:", err)
+                                return
+                        }
+                }
+        }()
+        factory.Close_proxy()
+}
+
+func (d *HttpHandlerDelegate) AcceptConnection(c *application.Connection) {
+        c.Close()
+}
+
+func (d *HttpHandlerDelegate) Quit() {
+        d.server.Close_proxy()
+        d.handlerStub.Close()
+}
+
+//export MojoMain
+func MojoMain(handle C.MojoHandle) C.MojoResult {
+        application.Run(&HttpHandlerDelegate{}, system.MojoHandle(handle))
+        return C.MOJO_RESULT_OK
+}
+
+func main() {
+        app.Run(app.Callbacks{})
+}