ducky/devices
2015-11-15
Parent:b6494e1a499e
ducky/devices/vendor/golang.org/x/net/context/ctxhttp/ctxhttp.go
Add ToMap and ToSlice helpers. Add helper functions that convert a map of ID-keyed Devices into a slice, and back. We'll use these a lot (especially with GetMany) as shorthand helper functions.
| paddy@0 | 1 // Copyright 2015 The Go Authors. All rights reserved. |
| paddy@0 | 2 // Use of this source code is governed by a BSD-style |
| paddy@0 | 3 // license that can be found in the LICENSE file. |
| paddy@0 | 4 |
| paddy@0 | 5 // Package ctxhttp provides helper functions for performing context-aware HTTP requests. |
| paddy@0 | 6 package ctxhttp |
| paddy@0 | 7 |
| paddy@0 | 8 import ( |
| paddy@0 | 9 "io" |
| paddy@0 | 10 "net/http" |
| paddy@0 | 11 "net/url" |
| paddy@0 | 12 "strings" |
| paddy@0 | 13 |
| paddy@0 | 14 "golang.org/x/net/context" |
| paddy@0 | 15 ) |
| paddy@0 | 16 |
| paddy@0 | 17 // Do sends an HTTP request with the provided http.Client and returns an HTTP response. |
| paddy@0 | 18 // If the client is nil, http.DefaultClient is used. |
| paddy@0 | 19 // If the context is canceled or times out, ctx.Err() will be returned. |
| paddy@0 | 20 func Do(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) { |
| paddy@0 | 21 if client == nil { |
| paddy@0 | 22 client = http.DefaultClient |
| paddy@0 | 23 } |
| paddy@0 | 24 |
| paddy@0 | 25 // Request cancelation changed in Go 1.5, see cancelreq.go and cancelreq_go14.go. |
| paddy@0 | 26 cancel := canceler(client, req) |
| paddy@0 | 27 |
| paddy@0 | 28 type responseAndError struct { |
| paddy@0 | 29 resp *http.Response |
| paddy@0 | 30 err error |
| paddy@0 | 31 } |
| paddy@0 | 32 result := make(chan responseAndError, 1) |
| paddy@0 | 33 |
| paddy@0 | 34 go func() { |
| paddy@0 | 35 resp, err := client.Do(req) |
| paddy@0 | 36 result <- responseAndError{resp, err} |
| paddy@0 | 37 }() |
| paddy@0 | 38 |
| paddy@0 | 39 select { |
| paddy@0 | 40 case <-ctx.Done(): |
| paddy@0 | 41 cancel() |
| paddy@0 | 42 return nil, ctx.Err() |
| paddy@0 | 43 case r := <-result: |
| paddy@0 | 44 return r.resp, r.err |
| paddy@0 | 45 } |
| paddy@0 | 46 } |
| paddy@0 | 47 |
| paddy@0 | 48 // Get issues a GET request via the Do function. |
| paddy@0 | 49 func Get(ctx context.Context, client *http.Client, url string) (*http.Response, error) { |
| paddy@0 | 50 req, err := http.NewRequest("GET", url, nil) |
| paddy@0 | 51 if err != nil { |
| paddy@0 | 52 return nil, err |
| paddy@0 | 53 } |
| paddy@0 | 54 return Do(ctx, client, req) |
| paddy@0 | 55 } |
| paddy@0 | 56 |
| paddy@0 | 57 // Head issues a HEAD request via the Do function. |
| paddy@0 | 58 func Head(ctx context.Context, client *http.Client, url string) (*http.Response, error) { |
| paddy@0 | 59 req, err := http.NewRequest("HEAD", url, nil) |
| paddy@0 | 60 if err != nil { |
| paddy@0 | 61 return nil, err |
| paddy@0 | 62 } |
| paddy@0 | 63 return Do(ctx, client, req) |
| paddy@0 | 64 } |
| paddy@0 | 65 |
| paddy@0 | 66 // Post issues a POST request via the Do function. |
| paddy@0 | 67 func Post(ctx context.Context, client *http.Client, url string, bodyType string, body io.Reader) (*http.Response, error) { |
| paddy@0 | 68 req, err := http.NewRequest("POST", url, body) |
| paddy@0 | 69 if err != nil { |
| paddy@0 | 70 return nil, err |
| paddy@0 | 71 } |
| paddy@0 | 72 req.Header.Set("Content-Type", bodyType) |
| paddy@0 | 73 return Do(ctx, client, req) |
| paddy@0 | 74 } |
| paddy@0 | 75 |
| paddy@0 | 76 // PostForm issues a POST request via the Do function. |
| paddy@0 | 77 func PostForm(ctx context.Context, client *http.Client, url string, data url.Values) (*http.Response, error) { |
| paddy@0 | 78 return Post(ctx, client, url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode())) |
| paddy@0 | 79 } |