78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
package transport
|
|
|
|
import (
|
|
"context"
|
|
"crypto"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"net/url"
|
|
"sync"
|
|
|
|
"github.com/go-fed/activity/pub"
|
|
"github.com/go-fed/httpsig"
|
|
)
|
|
|
|
// Transport wraps the pub.Transport interface with some additional
|
|
// functionality for fetching remote media.
|
|
type Transport interface {
|
|
pub.Transport
|
|
DereferenceMedia(c context.Context, iri *url.URL, expectedContentType string) ([]byte, error)
|
|
}
|
|
|
|
// transport implements the Transport interface
|
|
type transport struct {
|
|
client pub.HttpClient
|
|
appAgent string
|
|
gofedAgent string
|
|
clock pub.Clock
|
|
pubKeyID string
|
|
privkey crypto.PrivateKey
|
|
sigTransport *pub.HttpSigTransport
|
|
getSigner httpsig.Signer
|
|
getSignerMu *sync.Mutex
|
|
}
|
|
|
|
func (t *transport) BatchDeliver(c context.Context, b []byte, recipients []*url.URL) error {
|
|
return t.sigTransport.BatchDeliver(c, b, recipients)
|
|
}
|
|
|
|
func (t *transport) Deliver(c context.Context, b []byte, to *url.URL) error {
|
|
return t.sigTransport.Deliver(c, b, to)
|
|
}
|
|
|
|
func (t *transport) Dereference(c context.Context, iri *url.URL) ([]byte, error) {
|
|
return t.sigTransport.Dereference(c, iri)
|
|
}
|
|
|
|
func (t *transport) DereferenceMedia(c context.Context, iri *url.URL, expectedContentType string) ([]byte, error) {
|
|
req, err := http.NewRequest("GET", iri.String(), nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req = req.WithContext(c)
|
|
if expectedContentType == "" {
|
|
req.Header.Add("Accept", "*/*")
|
|
} else {
|
|
req.Header.Add("Accept", expectedContentType)
|
|
}
|
|
req.Header.Add("Date", t.clock.Now().UTC().Format("Mon, 02 Jan 2006 15:04:05")+" GMT")
|
|
req.Header.Add("User-Agent", fmt.Sprintf("%s %s", t.appAgent, t.gofedAgent))
|
|
req.Header.Set("Host", iri.Host)
|
|
t.getSignerMu.Lock()
|
|
err = t.getSigner.SignRequest(t.privkey, t.pubKeyID, req, nil)
|
|
t.getSignerMu.Unlock()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
resp, err := t.client.Do(req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer resp.Body.Close()
|
|
if resp.StatusCode != http.StatusOK {
|
|
return nil, fmt.Errorf("GET request to %s failed (%d): %s", iri.String(), resp.StatusCode, resp.Status)
|
|
}
|
|
return ioutil.ReadAll(resp.Body)
|
|
}
|