lego/acme/http.go

73 lines
1.9 KiB
Go
Raw Normal View History

package acme
import (
"fmt"
"io"
"net/http"
"runtime"
"strings"
)
// UserAgent, if non-empty, will be tacked onto the User-Agent string in requests.
var UserAgent string
const (
// defaultGoUserAgent is the Go HTTP package user agent string. Too
// bad it isn't exported. If it changes, we should update it here, too.
defaultGoUserAgent = "Go-http-client/1.1"
// ourUserAgent is the User-Agent of this underlying library package.
ourUserAgent = "xenolf-acme"
)
// httpHead performs a HEAD request with a proper User-Agent string.
// The response body (resp.Body) is already closed when this function returns.
func httpHead(url string) (resp *http.Response, err error) {
req, err := http.NewRequest("HEAD", url, nil)
if err != nil {
return nil, err
}
req.Header.Set("User-Agent", userAgent())
client := http.Client{}
resp, err = client.Do(req)
if resp.Body != nil {
resp.Body.Close()
}
return resp, err
}
// httpPost performs a POST request with a proper User-Agent string.
// Callers should close resp.Body when done reading from it.
func httpPost(url string, bodyType string, body io.Reader) (resp *http.Response, err error) {
req, err := http.NewRequest("POST", url, body)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", bodyType)
req.Header.Set("User-Agent", userAgent())
client := http.Client{}
return client.Do(req)
}
// httpGet performs a GET request with a proper User-Agent string.
// Callers should close resp.Body when done reading from it.
func httpGet(url string) (resp *http.Response, err error) {
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return nil, err
}
req.Header.Set("User-Agent", userAgent())
client := http.Client{}
return client.Do(req)
}
// userAgent builds and returns the User-Agent string to use in requests.
func userAgent() string {
ua := fmt.Sprintf("%s (%s; %s) %s %s", defaultGoUserAgent, runtime.GOOS, runtime.GOARCH, ourUserAgent, UserAgent)
return strings.TrimSpace(ua)
}