Google App Engine for GoがGo1.8に対応したので試してみた #golang #gcp ref: http://qiita.com/tenntenn/items/0b92fc089f8826fabaf1

file0.txt

$ gcloud components update

file1.txt

ls ~/Documents/go_appengine
BUGS                   VERSION                bulkload_client.py     download_appstats.py   godoc                  goroot                 php_cli.py             wrapper_util.pyc
LICENSE                _python_runtime.py     bulkloader.py          endpointscfg.py        gofmt                  goroot-1.6             run_tests.py
RELEASE_NOTES          appcfg.py              demos                  go-app-stager          google                 goroot-1.8             tools
RELEASE_NOTES.python   backends_conversion.py dev_appserver.py       goapp                  gopath                 lib                    wrapper_util.py

file10.go

func contextSet(r *http.Request, key, val interface{}) *http.Request {
    if val == nil {
        return r
    }

    return r.WithContext(context.WithValue(r.Context(), key, val))
}

file10.txt

func contextSet(r *http.Request, key, val interface{}) *http.Request {
    if val == nil {
        return r
    }

    return r.WithContext(context.WithValue(r.Context(), key, val))
}

file2.txt

$ goapp version
go version 1.6.4 (appengine-1.9.56) darwin/amd64
$ goapp env GOROOT
/Users/tenntenn/Documents/go_appengine/goroot-1.6

file3.txt

application: my-project-id
module: default
runtime: go
api_version: go1.8
version: main

handlers:
- url: /.*
  script: _go_app
  secure: always

file3.yml

application: my-project-id
module: default
runtime: go
api_version: go1.8
version: main

handlers:
- url: /.*
  script: _go_app
  secure: always

file4.txt

$ goapp version
go version 1.8.3 (appengine-1.9.56) darwin/amd64
$ goapp env GOROOT
/Users/tenntenn/Documents/go_appengine/goroot-1.8

file5.txt

$ go tool fix -force=context main.go

file6.go

func DoSomething(f func(c context.Context) {// contextはgolang.org/x/net/contextだとする
}

file6.txt

func DoSomething(f func(c context.Context) {// contextはgolang.org/x/net/contextだとする
}

file7.go

var slice []context.Context
var m map[*http.Request]context.Context

file7.txt

var slice []context.Context
var m map[*http.Request]context.Context

file8.go

package hello

import (
    "io"
    "net/http"

    "github.com/gorilla/mux"
    "google.golang.org/appengine"
    "google.golang.org/appengine/log"
)

func init() {
    mx := mux.NewRouter()
    mx.HandleFunc("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        ctx := appengine.NewContext(r)
        log.Debugf(ctx, "time to say hello!")
        io.WriteString(w, "howdy!")
    }))
    http.Handle("/", mx)
}

file8.txt

package hello

import (
    "io"
    "net/http"

    "github.com/gorilla/mux"
    "google.golang.org/appengine"
    "google.golang.org/appengine/log"
)

func init() {
    mx := mux.NewRouter()
    mx.HandleFunc("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        ctx := appengine.NewContext(r)
        log.Debugf(ctx, "time to say hello!")
        io.WriteString(w, "howdy!")
    }))
    http.Handle("/", mx)
}

file9.go

var ctxs = struct {
    sync.Mutex
    m  map[*http.Request]*context
    bg *context // background context, lazily initialized
    // dec is used by tests to decorate the netcontext.Context returned
    // for a given request. This allows tests to add overrides (such as
    // WithAppIDOverride) to the context. The map is nil outside tests.
    dec map[*http.Request]func(netcontext.Context) netcontext.Context
}{
    m: make(map[*http.Request]*context),
}

file9.txt

var ctxs = struct {
    sync.Mutex
    m  map[*http.Request]*context
    bg *context // background context, lazily initialized
    // dec is used by tests to decorate the netcontext.Context returned
    // for a given request. This allows tests to add overrides (such as
    // WithAppIDOverride) to the context. The map is nil outside tests.
    dec map[*http.Request]func(netcontext.Context) netcontext.Context
}{
    m: make(map[*http.Request]*context),
}