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http: expose Client's Transport

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This is again an intentionally minimal change.

The plan is to keep Client's zero value be a usable
client, with optional fields being added over time
(e.g. cookie manager, redirect policy, auth)

R=rsc
CC=golang-dev
https://golang.org/cl/4239044
This commit is contained in:
Brad Fitzpatrick 2011-03-01 14:07:28 -08:00
parent 966bf71366
commit 60f193781d
2 changed files with 22 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
src/pkg/http/client.go
View File

@ -16,10 +16,11 @@ import (
"strings"
)
// A Client is an HTTP client.
// It is not yet possible to create custom Clients; use DefaultClient.
// A Client is an HTTP client. Its zero value (DefaultClient) is a usable client
// that uses DefaultTransport.
// Client is not yet very configurable.
type Client struct {
transport ClientTransport // if nil, DefaultTransport is used
Transport ClientTransport // if nil, DefaultTransport is used
}
// DefaultClient is the default Client and is used by Get, Head, and Post.
@ -87,15 +88,15 @@ func matchNoProxy(addr string) bool {
// Do sends an HTTP request and returns an HTTP response, following
// policy (e.g. redirects, cookies, auth) as configured on the client.
//
// Callers should close resp.Body when done reading it.
// Callers should close resp.Body when done reading from it.
//
// Generally Get, Post, or PostForm will be used instead of Do.
func (c *Client) Do(req *Request) (resp *Response, err os.Error) {
return send(req, c.transport)
return send(req, c.Transport)
}
// send issues an HTTP request. Caller should close resp.Body when done reading it.
// send issues an HTTP request. Caller should close resp.Body when done reading from it.
//
// TODO: support persistent connections (multiple requests on a single connection).
// send() method is nonpublic because, when we refactor the code for persistent
@ -103,6 +104,10 @@ func (c *Client) Do(req *Request) (resp *Response, err os.Error) {
func send(req *Request, t ClientTransport) (resp *Response, err os.Error) {
if t == nil {
t = DefaultTransport
if t == nil {
err = os.NewError("no http.Client.Transport or http.DefaultTransport")
return
}
}
info := req.URL.RawUserinfo
if len(info) > 0 {
@ -138,7 +143,7 @@ func shouldRedirect(statusCode int) bool {
// finalURL is the URL from which the response was fetched -- identical to the
// input URL unless redirects were followed.
//
// Caller should close r.Body when done reading it.
// Caller should close r.Body when done reading from it.
//
// Get is a convenience wrapper around DefaultClient.Get.
func Get(url string) (r *Response, finalURL string, err os.Error) {
@ -156,7 +161,7 @@ func Get(url string) (r *Response, finalURL string, err os.Error) {
// finalURL is the URL from which the response was fetched -- identical to the
// input URL unless redirects were followed.
//
// Caller should close r.Body when done reading it.
// Caller should close r.Body when done reading from it.
func (c *Client) Get(url string) (r *Response, finalURL string, err os.Error) {
// TODO: if/when we add cookie support, the redirected request shouldn't
// necessarily supply the same cookies as the original.
@ -183,7 +188,7 @@ func (c *Client) Get(url string) (r *Response, finalURL string, err os.Error) {
break
}
url = req.URL.String()
if r, err = send(&req, c.transport); err != nil {
if r, err = send(&req, c.Transport); err != nil {
break
}
if shouldRedirect(r.StatusCode) {
@ -205,7 +210,7 @@ func (c *Client) Get(url string) (r *Response, finalURL string, err os.Error) {
// Post issues a POST to the specified URL.
//
// Caller should close r.Body when done reading it.
// Caller should close r.Body when done reading from it.
//
// Post is a wrapper around DefaultClient.Post
func Post(url string, bodyType string, body io.Reader) (r *Response, err os.Error) {
@ -214,7 +219,7 @@ func Post(url string, bodyType string, body io.Reader) (r *Response, err os.Erro
// Post issues a POST to the specified URL.
//
// Caller should close r.Body when done reading it.
// Caller should close r.Body when done reading from it.
func (c *Client) Post(url string, bodyType string, body io.Reader) (r *Response, err os.Error) {
var req Request
req.Method = "POST"
@ -232,13 +237,13 @@ func (c *Client) Post(url string, bodyType string, body io.Reader) (r *Response,
return nil, err
}
return send(&req, c.transport)
return send(&req, c.Transport)
}
// PostForm issues a POST to the specified URL,
// with data's keys and values urlencoded as the request body.
//
// Caller should close r.Body when done reading it.
// Caller should close r.Body when done reading from it.
//
// PostForm is a wrapper around DefaultClient.PostForm
func PostForm(url string, data map[string]string) (r *Response, err os.Error) {
@ -248,7 +253,7 @@ func PostForm(url string, data map[string]string) (r *Response, err os.Error) {
// PostForm issues a POST to the specified URL,
// with data's keys and values urlencoded as the request body.
//
// Caller should close r.Body when done reading it.
// Caller should close r.Body when done reading from it.
func (c *Client) PostForm(url string, data map[string]string) (r *Response, err os.Error) {
var req Request
req.Method = "POST"
@ -268,7 +273,7 @@ func (c *Client) PostForm(url string, data map[string]string) (r *Response, err
return nil, err
}
return send(&req, c.transport)
return send(&req, c.Transport)
}
// TODO: remove this function when PostForm takes a multimap.
@ -294,7 +299,7 @@ func (c *Client) Head(url string) (r *Response, err os.Error) {
if req.URL, err = ParseURL(url); err != nil {
return
}
return send(&req, c.transport)
return send(&req, c.Transport)
}
type nopCloser struct {

2
src/pkg/http/client_test.go
View File

@ -51,7 +51,7 @@ func (t *recordingTransport) Do(req *Request) (resp *Response, err os.Error) {
func TestGetRequestFormat(t *testing.T) {
tr := &recordingTransport{}
client := &Client{transport: tr}
client := &Client{Transport: tr}
url := "http://dummy.faketld/"
client.Get(url) // Note: doesn't hit network
if tr.req.Method != "GET" {