26a09c434d
* app.yaml: update to go112 Make the required changes to use go112 due to the deprecation of Go 1.9. Migration doc: - https://cloud.google.com/appengine/docs/standard/go111/go-differences References: - https://github.com/GoogleCloudPlatform/govanityurls/issues/29#issuecomment-506538041 - https://github.com/etcd-io/maintainers/issues/17 * go.mod: initial commit Migrate this project to use go.mod and update the README. This is part of the recommended steps to runtime: go111 and beyond. https://cloud.google.com/appengine/docs/standard/go111/go-differences * vendor: add dependent packages Add all dependencies for the project via vendoring for offline builds. * travis.yml: drop go 1.6 for 1.12 Go 1.6 is too old to have a number of builtin packages for the latest appengine package. Remove and update to match app engine version: 1.12. * appengine.go: remove unused file From the go111 migration doc: "The appengine build tag is deprecated and will not be used when building your app for deployment. Ensure your code still functions correctly without it being set." https://cloud.google.com/appengine/docs/standard/go111/go-differences * main: respect PORT environment variable The go111 runtime should use the PORT variable to decide the listening http port. "PORT The port that receives HTTP requests." https://cloud.google.com/appengine/docs/standard/go111/runtime
73 lines
2.8 KiB
Go
73 lines
2.8 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build go1.7
|
|
|
|
package context
|
|
|
|
import (
|
|
"context" // standard library's context, as of Go 1.7
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
todo = context.TODO()
|
|
background = context.Background()
|
|
)
|
|
|
|
// Canceled is the error returned by Context.Err when the context is canceled.
|
|
var Canceled = context.Canceled
|
|
|
|
// DeadlineExceeded is the error returned by Context.Err when the context's
|
|
// deadline passes.
|
|
var DeadlineExceeded = context.DeadlineExceeded
|
|
|
|
// WithCancel returns a copy of parent with a new Done channel. The returned
|
|
// context's Done channel is closed when the returned cancel function is called
|
|
// or when the parent context's Done channel is closed, whichever happens first.
|
|
//
|
|
// Canceling this context releases resources associated with it, so code should
|
|
// call cancel as soon as the operations running in this Context complete.
|
|
func WithCancel(parent Context) (ctx Context, cancel CancelFunc) {
|
|
ctx, f := context.WithCancel(parent)
|
|
return ctx, CancelFunc(f)
|
|
}
|
|
|
|
// WithDeadline returns a copy of the parent context with the deadline adjusted
|
|
// to be no later than d. If the parent's deadline is already earlier than d,
|
|
// WithDeadline(parent, d) is semantically equivalent to parent. The returned
|
|
// context's Done channel is closed when the deadline expires, when the returned
|
|
// cancel function is called, or when the parent context's Done channel is
|
|
// closed, whichever happens first.
|
|
//
|
|
// Canceling this context releases resources associated with it, so code should
|
|
// call cancel as soon as the operations running in this Context complete.
|
|
func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) {
|
|
ctx, f := context.WithDeadline(parent, deadline)
|
|
return ctx, CancelFunc(f)
|
|
}
|
|
|
|
// WithTimeout returns WithDeadline(parent, time.Now().Add(timeout)).
|
|
//
|
|
// Canceling this context releases resources associated with it, so code should
|
|
// call cancel as soon as the operations running in this Context complete:
|
|
//
|
|
// func slowOperationWithTimeout(ctx context.Context) (Result, error) {
|
|
// ctx, cancel := context.WithTimeout(ctx, 100*time.Millisecond)
|
|
// defer cancel() // releases resources if slowOperation completes before timeout elapses
|
|
// return slowOperation(ctx)
|
|
// }
|
|
func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) {
|
|
return WithDeadline(parent, time.Now().Add(timeout))
|
|
}
|
|
|
|
// WithValue returns a copy of parent in which the value associated with key is
|
|
// val.
|
|
//
|
|
// Use context Values only for request-scoped data that transits processes and
|
|
// APIs, not for passing optional parameters to functions.
|
|
func WithValue(parent Context, key interface{}, val interface{}) Context {
|
|
return context.WithValue(parent, key, val)
|
|
}
|