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|
package http
import (
ctxt "context"
"crypto/tls"
"fmt"
"net/http"
"time"
)
// share HTTP clients
var (
stdClient *http.Client
unsafeClient *http.Client
)
// Error represents an HTTP error returned by a server.
type Error struct {
StatusCode int
Status string
}
func (err Error) Error() string {
return fmt.Sprintf("http error: %s", err.Status)
}
func init() {
// std
stdClient = &http.Client{Transport: http.DefaultTransport}
// unsafe
tlsConfig := &tls.Config{InsecureSkipVerify: true}
transport := http.DefaultTransport.(*http.Transport).Clone()
transport.TLSClientConfig = tlsConfig
unsafeClient = &http.Client{Transport: transport}
}
func context(timeout int) (ctxt.Context, ctxt.CancelFunc) {
return ctxt.WithTimeout(ctxt.Background(), time.Duration(timeout)*time.Second)
}
func client(disableTLS bool) *http.Client {
if disableTLS {
return unsafeClient
}
return stdClient
}
var noop ctxt.CancelFunc = func() {}
func Get(url string, timeout int, disableTLS bool) (resp *http.Response, cancel ctxt.CancelFunc, err error) {
prematureExit := true
ctx, ctxCancel := context(timeout)
cancel = func() {
if resp != nil {
_ = resp.Body.Close()
}
ctxCancel()
}
defer func() {
if prematureExit {
cancel()
}
}()
req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
return nil, noop, err
}
req.Header.Set("User-Agent", "Feed2Imap-Go/1.0")
resp, err = client(disableTLS).Do(req)
if err != nil {
return nil, noop, err
}
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
return nil, noop, Error{
StatusCode: resp.StatusCode,
Status: resp.Status,
}
}
prematureExit = false
return resp, cancel, nil
}
|
