81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
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// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package vcs
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import (
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net/http"
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"net/url"
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)
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// httpClient is the default HTTP client, but a variable so it can be
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// changed by tests, without modifying http.DefaultClient.
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var httpClient = http.DefaultClient
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// httpGET returns the data from an HTTP GET request for the given URL.
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func httpGET(url string) ([]byte, error) {
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resp, err := httpClient.Get(url)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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return nil, fmt.Errorf("%s: %s", url, resp.Status)
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}
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b, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("%s: %v", url, err)
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}
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return b, nil
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}
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// httpsOrHTTP returns the body of either the importPath's
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// https resource or, if unavailable, the http resource.
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func httpsOrHTTP(importPath string) (urlStr string, body io.ReadCloser, err error) {
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fetch := func(scheme string) (urlStr string, res *http.Response, err error) {
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u, err := url.Parse(scheme + "://" + importPath)
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if err != nil {
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return "", nil, err
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}
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u.RawQuery = "go-get=1"
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urlStr = u.String()
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if Verbose {
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log.Printf("Fetching %s", urlStr)
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}
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res, err = httpClient.Get(urlStr)
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return
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}
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closeBody := func(res *http.Response) {
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if res != nil {
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res.Body.Close()
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}
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}
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urlStr, res, err := fetch("https")
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if err != nil || res.StatusCode != 200 {
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if Verbose {
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if err != nil {
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log.Printf("https fetch failed.")
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} else {
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log.Printf("ignoring https fetch with status code %d", res.StatusCode)
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}
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}
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closeBody(res)
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urlStr, res, err = fetch("http")
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}
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if err != nil {
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closeBody(res)
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return "", nil, err
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}
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// Note: accepting a non-200 OK here, so people can serve a
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// meta import in their http 404 page.
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if Verbose {
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log.Printf("Parsing meta tags from %s (status code %d)", urlStr, res.StatusCode)
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}
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return urlStr, res.Body, nil
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}
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