Fix the dependency issue (#231)

vendor/github.com/docker/engine-api/client/transport/cancellable/canceler.go

@@ -1,23 +0,0 @@
-// Copyright 2015 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 go1.5
-
-package cancellable
-
-import (
-	"net/http"
-
-	"github.com/docker/engine-api/client/transport"
-)
-
-func canceler(client transport.Sender, req *http.Request) func() {
-	// TODO(djd): Respect any existing value of req.Cancel.
-	ch := make(chan struct{})
-	req.Cancel = ch
-
-	return func() {
-		close(ch)
-	}
-}

vendor/github.com/docker/engine-api/client/transport/cancellable/canceler_go14.go

@@ -1,27 +0,0 @@
-// Copyright 2015 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 !go1.5
-
-package cancellable
-
-import (
-	"net/http"
-
-	"github.com/docker/engine-api/client/transport"
-)
-
-type requestCanceler interface {
-	CancelRequest(*http.Request)
-}
-
-func canceler(client transport.Sender, req *http.Request) func() {
-	rc, ok := client.(requestCanceler)
-	if !ok {
-		return func() {}
-	}
-	return func() {
-		rc.CancelRequest(req)
-	}
-}

vendor/github.com/docker/engine-api/client/transport/cancellable/cancellable.go

@@ -1,113 +0,0 @@
-// Copyright 2015 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.
-
-// Package cancellable provides helper function to cancel http requests.
-package cancellable
-
-import (
-	"io"
-	"net/http"
-
-	"github.com/docker/engine-api/client/transport"
-
-	"golang.org/x/net/context"
-)
-
-func nop() {}
-
-var (
-	testHookContextDoneBeforeHeaders = nop
-	testHookDoReturned               = nop
-	testHookDidBodyClose             = nop
-)
-
-// Do sends an HTTP request with the provided transport.Sender and returns an HTTP response.
-// If the client is nil, http.DefaultClient is used.
-// If the context is canceled or times out, ctx.Err() will be returned.
-//
-// FORK INFORMATION:
-//
-// This function deviates from the upstream version in golang.org/x/net/context/ctxhttp by
-// taking a Sender interface rather than a *http.Client directly. That allow us to use
-// this function with mocked clients and hijacked connections.
-func Do(ctx context.Context, client transport.Sender, req *http.Request) (*http.Response, error) {
-	if client == nil {
-		client = http.DefaultClient
-	}
-
-	// Request cancelation changed in Go 1.5, see canceler.go and canceler_go14.go.
-	cancel := canceler(client, req)
-
-	type responseAndError struct {
-		resp *http.Response
-		err  error
-	}
-	result := make(chan responseAndError, 1)
-
-	go func() {
-		resp, err := client.Do(req)
-		testHookDoReturned()
-		result <- responseAndError{resp, err}
-	}()
-
-	var resp *http.Response
-
-	select {
-	case <-ctx.Done():
-		testHookContextDoneBeforeHeaders()
-		cancel()
-		// Clean up after the goroutine calling client.Do:
-		go func() {
-			if r := <-result; r.resp != nil && r.resp.Body != nil {
-				testHookDidBodyClose()
-				r.resp.Body.Close()
-			}
-		}()
-		return nil, ctx.Err()
-	case r := <-result:
-		var err error
-		resp, err = r.resp, r.err
-		if err != nil {
-			return resp, err
-		}
-	}
-
-	c := make(chan struct{})
-	go func() {
-		select {
-		case <-ctx.Done():
-			cancel()
-		case <-c:
-			// The response's Body is closed.
-		}
-	}()
-	resp.Body = &notifyingReader{resp.Body, c}
-
-	return resp, nil
-}
-
-// notifyingReader is an io.ReadCloser that closes the notify channel after
-// Close is called or a Read fails on the underlying ReadCloser.
-type notifyingReader struct {
-	io.ReadCloser
-	notify chan<- struct{}
-}
-
-func (r *notifyingReader) Read(p []byte) (int, error) {
-	n, err := r.ReadCloser.Read(p)
-	if err != nil && r.notify != nil {
-		close(r.notify)
-		r.notify = nil
-	}
-	return n, err
-}
-
-func (r *notifyingReader) Close() error {
-	err := r.ReadCloser.Close()
-	if r.notify != nil {
-		close(r.notify)
-		r.notify = nil
-	}
-	return err
-}