mirror of
https://github.com/go-acme/lego.git
synced 2024-12-27 19:43:24 +02:00
116 lines
3.1 KiB
Go
116 lines
3.1 KiB
Go
package acme
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"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)
|
|
}
|
|
|
|
// getJSON performs an HTTP GET request and parses the response body
|
|
// as JSON, into the provided respBody object.
|
|
func getJSON(uri string, respBody interface{}) (http.Header, error) {
|
|
resp, err := httpGet(uri)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to get %q: %v", uri, err)
|
|
}
|
|
defer resp.Body.Close()
|
|
|
|
if resp.StatusCode >= http.StatusBadRequest {
|
|
return resp.Header, handleHTTPError(resp)
|
|
}
|
|
|
|
return resp.Header, json.NewDecoder(resp.Body).Decode(respBody)
|
|
}
|
|
|
|
// postJSON performs an HTTP POST request and parses the response body
|
|
// as JSON, into the provided respBody object.
|
|
func postJSON(j *jws, uri string, reqBody, respBody interface{}) (http.Header, error) {
|
|
jsonBytes, err := json.Marshal(reqBody)
|
|
if err != nil {
|
|
return nil, errors.New("Failed to marshal network message...")
|
|
}
|
|
|
|
resp, err := j.post(uri, jsonBytes)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Failed to post JWS message. -> %v", err)
|
|
}
|
|
defer resp.Body.Close()
|
|
|
|
if resp.StatusCode >= http.StatusBadRequest {
|
|
return resp.Header, handleHTTPError(resp)
|
|
}
|
|
|
|
if respBody == nil {
|
|
return resp.Header, nil
|
|
}
|
|
|
|
return resp.Header, json.NewDecoder(resp.Body).Decode(respBody)
|
|
}
|
|
|
|
// 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)
|
|
}
|