mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-25 00:44:15 -05:00
d6abb363f6
use proper http time format than replacing with GMT in time.RFC1123 =) Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/4132 Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org> Co-authored-by: Shiny Nematoda <snematoda.751k2@aleeas.com> Co-committed-by: Shiny Nematoda <snematoda.751k2@aleeas.com>
170 lines
4.8 KiB
Go
170 lines
4.8 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
|
|
// Copyright 2024 The Forgejo Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
// TODO: Think about whether this should be moved to services/activitypub (compare to exosy/services/activitypub/client.go)
|
|
package activitypub
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"crypto/rsa"
|
|
"crypto/x509"
|
|
"encoding/pem"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
user_model "code.gitea.io/gitea/models/user"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/proxy"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
|
|
"github.com/go-fed/httpsig"
|
|
)
|
|
|
|
const (
|
|
// ActivityStreamsContentType const
|
|
ActivityStreamsContentType = `application/ld+json; profile="https://www.w3.org/ns/activitystreams"`
|
|
httpsigExpirationTime = 60
|
|
)
|
|
|
|
func CurrentTime() string {
|
|
return time.Now().UTC().Format(http.TimeFormat)
|
|
}
|
|
|
|
func containsRequiredHTTPHeaders(method string, headers []string) error {
|
|
var hasRequestTarget, hasDate, hasDigest bool
|
|
for _, header := range headers {
|
|
hasRequestTarget = hasRequestTarget || header == httpsig.RequestTarget
|
|
hasDate = hasDate || header == "Date"
|
|
hasDigest = hasDigest || header == "Digest"
|
|
}
|
|
if !hasRequestTarget {
|
|
return fmt.Errorf("missing http header for %s: %s", method, httpsig.RequestTarget)
|
|
} else if !hasDate {
|
|
return fmt.Errorf("missing http header for %s: Date", method)
|
|
} else if !hasDigest && method != http.MethodGet {
|
|
return fmt.Errorf("missing http header for %s: Digest", method)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Client struct
|
|
type Client struct {
|
|
client *http.Client
|
|
algs []httpsig.Algorithm
|
|
digestAlg httpsig.DigestAlgorithm
|
|
getHeaders []string
|
|
postHeaders []string
|
|
priv *rsa.PrivateKey
|
|
pubID string
|
|
}
|
|
|
|
// NewClient function
|
|
func NewClient(ctx context.Context, user *user_model.User, pubID string) (c *Client, err error) {
|
|
if err = containsRequiredHTTPHeaders(http.MethodGet, setting.Federation.GetHeaders); err != nil {
|
|
return nil, err
|
|
} else if err = containsRequiredHTTPHeaders(http.MethodPost, setting.Federation.PostHeaders); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
priv, err := GetPrivateKey(ctx, user)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
privPem, _ := pem.Decode([]byte(priv))
|
|
privParsed, err := x509.ParsePKCS1PrivateKey(privPem.Bytes)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
c = &Client{
|
|
client: &http.Client{
|
|
Transport: &http.Transport{
|
|
Proxy: proxy.Proxy(),
|
|
},
|
|
Timeout: 5 * time.Second,
|
|
},
|
|
algs: setting.HttpsigAlgs,
|
|
digestAlg: httpsig.DigestAlgorithm(setting.Federation.DigestAlgorithm),
|
|
getHeaders: setting.Federation.GetHeaders,
|
|
postHeaders: setting.Federation.PostHeaders,
|
|
priv: privParsed,
|
|
pubID: pubID,
|
|
}
|
|
return c, err
|
|
}
|
|
|
|
// NewRequest function
|
|
func (c *Client) NewRequest(method string, b []byte, to string) (req *http.Request, err error) {
|
|
buf := bytes.NewBuffer(b)
|
|
req, err = http.NewRequest(method, to, buf)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
req.Header.Add("Content-Type", ActivityStreamsContentType)
|
|
req.Header.Add("Date", CurrentTime())
|
|
req.Header.Add("User-Agent", "Gitea/"+setting.AppVer)
|
|
signer, _, err := httpsig.NewSigner(c.algs, c.digestAlg, c.postHeaders, httpsig.Signature, httpsigExpirationTime)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
err = signer.SignRequest(c.priv, c.pubID, req, b)
|
|
return req, err
|
|
}
|
|
|
|
// Post function
|
|
func (c *Client) Post(b []byte, to string) (resp *http.Response, err error) {
|
|
var req *http.Request
|
|
if req, err = c.NewRequest(http.MethodPost, b, to); err != nil {
|
|
return nil, err
|
|
}
|
|
resp, err = c.client.Do(req)
|
|
return resp, err
|
|
}
|
|
|
|
// Create an http GET request with forgejo/gitea specific headers
|
|
func (c *Client) Get(to string) (resp *http.Response, err error) {
|
|
var req *http.Request
|
|
emptyBody := []byte{0}
|
|
if req, err = c.NewRequest(http.MethodGet, emptyBody, to); err != nil {
|
|
return nil, err
|
|
}
|
|
resp, err = c.client.Do(req)
|
|
return resp, err
|
|
}
|
|
|
|
// Create an http GET request with forgejo/gitea specific headers
|
|
func (c *Client) GetBody(uri string) ([]byte, error) {
|
|
response, err := c.Get(uri)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
log.Debug("Client: got status: %v", response.Status)
|
|
if response.StatusCode != 200 {
|
|
err = fmt.Errorf("got non 200 status code for id: %v", uri)
|
|
return nil, err
|
|
}
|
|
defer response.Body.Close()
|
|
body, err := io.ReadAll(response.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
log.Debug("Client: got body: %v", charLimiter(string(body), 120))
|
|
return body, nil
|
|
}
|
|
|
|
// Limit number of characters in a string (useful to prevent log injection attacks and overly long log outputs)
|
|
// Thanks to https://www.socketloop.com/tutorials/golang-characters-limiter-example
|
|
func charLimiter(s string, limit int) string {
|
|
reader := strings.NewReader(s)
|
|
buff := make([]byte, limit)
|
|
n, _ := io.ReadAtLeast(reader, buff, limit)
|
|
if n != 0 {
|
|
return fmt.Sprint(string(buff), "...")
|
|
}
|
|
return s
|
|
}
|