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// Copyright 2012 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 !cmd_go_bootstrap
// This code is compiled into the real 'go' binary, but it is not
// compiled into the binary that is built during all.bash, so as
// to avoid needing to build net (and thus use cgo) during the
// bootstrap process.
package main
import (
"cmd/internal/browser"
"crypto/tls"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"net/url"
"time"
)
// httpClient is the default HTTP client, but a variable so it can be
// changed by tests, without modifying http.DefaultClient.
var httpClient = http.DefaultClient
// impatientInsecureHTTPClient is used in -insecure mode,
// when we're connecting to https servers that might not be there
// or might be using self-signed certificates.
var impatientInsecureHTTPClient = &http.Client{
Timeout: 5 * time.Second,
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
},
}
type httpError struct {
status string
statusCode int
url string
}
func (e *httpError) Error() string {
return fmt.Sprintf("%s: %s", e.url, e.status)
}
// httpGET returns the data from an HTTP GET request for the given URL.
func httpGET(url string) ([]byte, error) {
resp, err := httpClient.Get(url)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
err := &httpError{status: resp.Status, statusCode: resp.StatusCode, url: url}
return nil, err
}
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("%s: %v", url, err)
}
return b, nil
}
// httpsOrHTTP returns the body of either the importPath's
// https resource or, if unavailable, the http resource.
func httpsOrHTTP(importPath string, security securityMode) (urlStr string, body io.ReadCloser, err error) {
fetch := func(scheme string) (urlStr string, res *http.Response, err error) {
u, err := url.Parse(scheme + "://" + importPath)
if err != nil {
return "", nil, err
}
u.RawQuery = "go-get=1"
urlStr = u.String()
if buildV {
log.Printf("Fetching %s", urlStr)
}
if security == insecure && scheme == "https" { // fail earlier
res, err = impatientInsecureHTTPClient.Get(urlStr)
} else {
res, err = httpClient.Get(urlStr)
}
return
}
closeBody := func(res *http.Response) {
if res != nil {
res.Body.Close()
}
}
urlStr, res, err := fetch("https")
if err != nil {
if buildV {
log.Printf("https fetch failed: %v", err)
}
if security == insecure {
closeBody(res)
urlStr, res, err = fetch("http")
}
}
if err != nil {
closeBody(res)
return "", nil, err
}
// Note: accepting a non-200 OK here, so people can serve a
// meta import in their http 404 page.
if buildV {
log.Printf("Parsing meta tags from %s (status code %d)", urlStr, res.StatusCode)
}
return urlStr, res.Body, nil
}
func queryEscape(s string) string { return url.QueryEscape(s) }
func openBrowser(url string) bool { return browser.Open(url) }
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