lilfade/Activity-Relay
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Version 0.0.1

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This commit is contained in:
Naoki Kosaka 2018-11-07 01:44:50 +09:00
parent e5d9a647bd
commit 033e35dd6d
13 changed files with 1898 additions and 0 deletions
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30
.gitignore vendored Normal file
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# Created by https://www.gitignore.io/api/go,visualstudiocode
### Go ###
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, build with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
### Go Patch ###
/vendor/
/Godeps/
### VisualStudioCode ###
.vscode/*
!.vscode/settings.json
!.vscode/tasks.json
!.vscode/launch.json
!.vscode/extensions.json
# End of https://www.gitignore.io/api/go,visualstudiocode

138
ActivityPub/activity.go Normal file
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package activitypub
import (
"bytes"
"crypto/rsa"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"os"
"time"
"github.com/Songmu/go-httpdate"
"github.com/yukimochi/Activity-Relay/KeyLoader"
"github.com/yukimochi/httpsig"
)
var UA_STRING = "YUKIMOCHI Toot Relay Service (golang net/http; Activity-Relay v0.0.1; " + os.Getenv("RELAY_DOMAIN") + ")"
func appendSignature(r *http.Request, body *[]byte, KeyID string, pKey *rsa.PrivateKey) error {
hash := sha256.New()
hash.Write(*body)
b := hash.Sum(nil)
r.Header.Set("Digest", "SHA-256="+base64.StdEncoding.EncodeToString(b))
r.Header.Set("Host", r.Host)
signer, _, err := httpsig.NewSigner([]httpsig.Algorithm{httpsig.RSA_SHA256}, []string{httpsig.RequestTarget, "Host", "Date", "Digest", "Content-Type"}, httpsig.Signature)
if err != nil {
return err
}
err = signer.SignRequest(pKey, KeyID, r)
if err != nil {
return err
}
return nil
}
// SendActivity : Send ActivityPub Activity.
func SendActivity(inboxURL string, KeyID string, refBytes []byte, pKey *rsa.PrivateKey) error {
req, _ := http.NewRequest("POST", inboxURL, bytes.NewBuffer(refBytes))
req.Header.Set("Content-Type", "application/activity+json, application/ld+json")
req.Header.Set("User-Agent", UA_STRING)
req.Header.Set("Date", httpdate.Time2Str(time.Now()))
appendSignature(req, &refBytes, KeyID, pKey)
client := &http.Client{Timeout: time.Duration(5) * time.Second}
resp, err := client.Do(req)
if err != nil {
return err
}
fmt.Println(inboxURL, resp.StatusCode)
if resp.StatusCode/100 != 2 {
return errors.New(resp.Status)
}
return nil
}
// RetrieveActor : Retrieve Remote actor
func RetrieveActor(url string) (*Actor, error) {
req, _ := http.NewRequest("GET", url, nil)
req.Header.Set("Accept", "application/activity+json, application/ld+json")
req.Header.Set("User-Agent", UA_STRING)
client := new(http.Client)
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
data, _ := ioutil.ReadAll(resp.Body)
var actor Actor
err = json.Unmarshal(data, &actor)
if err != nil {
return nil, err
}
return &actor, nil
}
// DescribeNestedActivity : Descrive Nested Activity Series
func DescribeNestedActivity(nestedActivity interface{}) (*Activity, error) {
mappedObject := nestedActivity.(map[string]interface{})
return &Activity{
ID: mappedObject["id"].(string),
Type: mappedObject["type"].(string),
Actor: mappedObject["actor"].(string),
Object: mappedObject["object"],
}, nil
}
// GenerateActor : Generate Actor by hostname and publickey
func GenerateActor(hostname *url.URL, publickey *rsa.PublicKey) Actor {
return Actor{
[]string{"https://www.w3.org/ns/activitystreams", "https://w3id.org/security/v1"},
hostname.String() + "/actor",
"Service",
"relay",
hostname.String() + "/inbox",
nil,
PublicKey{
hostname.String() + "/actor#main-key",
hostname.String() + "/actor",
keyloader.GeneratePublicKeyPEMString(publickey),
},
}
}
// GenerateWebfingerResource : Generate Webfinger Resource
func GenerateWebfingerResource(hostname *url.URL, actor *Actor) WebfingerResource {
return WebfingerResource{
"acct:" + actor.PreferredUsername + "@" + hostname.Host,
[]WebfingerLink{
WebfingerLink{
"self",
"application/activity+json",
actor.ID,
},
},
}
}
// GenerateActivityResponse : Generate Responce Activity to Activity
func GenerateActivityResponse(host *url.URL, to *url.URL, responseType string, activity Activity) Activity {
return Activity{
[]string{"https://www.w3.org/ns/activitystreams", "https://w3id.org/security/v1"},
host.String() + "/actor#accepts/follows/" + to.Host,
host.String() + "/actor",
responseType,
&activity,
nil,
nil,
}
}

55
ActivityPub/models.go Normal file
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package activitypub
// PublicKey : Activity Certificate.
type PublicKey struct {
ID string `json:"id"`
Owner string `json:"owner"`
PublicKeyPem string `json:"publicKeyPem"`
}
type endpoints struct {
SharedInbox string `json:"sharedInbox"`
}
// Actor : ActivityPub Actor.
type Actor struct {
Context interface{} `json:"@context"`
ID string `json:"id"`
Type string `json:"type"`
PreferredUsername string `json:"preferredUsername"`
Inbox string `json:"inbox"`
Endpoints *endpoints `json:"endpoints"`
PublicKey PublicKey `json:"publicKey"`
}
// Activity : ActivityPub Activity.
type Activity struct {
Context interface{} `json:"@context"`
ID string `json:"id"`
Actor string `json:"actor"`
Type string `json:"type"`
Object interface{} `json:"object"`
To []string `json:"to"`
Cc []string `json:"cc"`
}
// Signature : ActivityPub Header Signature.
type Signature struct {
Type string `json:"type"`
Creator string `json:"creator"`
Created string `json:"created"`
SignatureValue string `json:"signatureValue"`
}
// WebfingerResource : Webfinger Resource.
type WebfingerResource struct {
Subject string `json:"subject"`
Links []WebfingerLink `json:"links"`
}
// WebfingerLink : Webfinger Link Resource.
type WebfingerLink struct {
Rel string `json:"rel"`
Type string `json:"type"`
Href string `json:"href"`
}

475
Gopkg.lock generated Normal file
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[solve-meta]
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analyzer-version = 1
input-imports = [
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"github.com/RichardKnop/machinery/v1/tasks",
"github.com/Songmu/go-httpdate",
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"github.com/yukimochi/httpsig",
]
solver-name = "gps-cdcl"
solver-version = 1

3
Gopkg.toml Normal file
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@ -0,0 +1,3 @@
[prune]
go-tests = true
unused-packages = true

46
KeyLoader/keyloader.go Normal file
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package keyloader
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"io/ioutil"
"unsafe"
)
func ReadPrivateKeyRSAfromPath(path string) (*rsa.PrivateKey, error) {
file, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
decoded, _ := pem.Decode(file)
priv, err := x509.ParsePKCS1PrivateKey(decoded.Bytes)
if err != nil {
return nil, err
}
return priv, nil
}
func ReadPublicKeyRSAfromString(pemString string) (*rsa.PublicKey, error) {
pemByte := *(*[]byte)(unsafe.Pointer(&pemString))
decoded, _ := pem.Decode(pemByte)
keyInterface, err := x509.ParsePKIXPublicKey(decoded.Bytes)
if err != nil {
fmt.Println(err)
return nil, err
}
pub := keyInterface.(*rsa.PublicKey)
return pub, nil
}
func GeneratePublicKeyPEMString(pub *rsa.PublicKey) string {
pubkeyBytes := x509.MarshalPKCS1PublicKey(pub)
pubkeyPem := pem.EncodeToMemory(
&pem.Block{
Type: "RSA PUBLIC KEY",
Bytes: pubkeyBytes,
},
)
return string(pubkeyPem)
}

661
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@ -0,0 +1,661 @@
GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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If, pursuant to or in connection with a single transaction or
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you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
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work if you are a party to an arrangement with a third party that is
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to the third party based on the extent of your activity of conveying
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or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
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License and any other pertinent obligations, then as a consequence you may
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to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your version
supports such interaction) an opportunity to receive the Corresponding
Source of your version by providing access to the Corresponding Source
from a network server at no charge, through some standard or customary
means of facilitating copying of software. This Corresponding Source
shall include the Corresponding Source for any work covered by version 3
of the GNU General Public License that is incorporated pursuant to the
following paragraph.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU Affero General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<http://www.gnu.org/licenses/>.

56
decode.go Normal file
View File

@ -0,0 +1,56 @@
package main
import (
"crypto/sha256"
"encoding/base64"
"encoding/json"
"errors"
"net/http"
"strconv"
"github.com/yukimochi/Activity-Relay/ActivityPub"
"github.com/yukimochi/Activity-Relay/KeyLoader"
"github.com/yukimochi/httpsig"
)
func decodeActivity(r *http.Request) (*activitypub.Activity, *activitypub.Actor, []byte, error) {
r.Header.Set("Host", r.Host)
dataLen, _ := strconv.Atoi(r.Header.Get("Content-Length"))
body := make([]byte, dataLen)
r.Body.Read(body)
// Verify HTTPSignature
verifier, _ := httpsig.NewVerifier(r)
KeyID := verifier.KeyId()
remoteActor, err := activitypub.RetrieveActor(KeyID)
if err != nil {
return nil, nil, nil, err
}
PubKey, err := keyloader.ReadPublicKeyRSAfromString(remoteActor.PublicKey.PublicKeyPem)
if err != nil {
return nil, nil, nil, err
}
err = verifier.Verify(PubKey, httpsig.RSA_SHA256)
if err != nil {
return nil, nil, nil, err
}
// Verify Digest
givenDigest := r.Header.Get("Digest")
hash := sha256.New()
hash.Write(body)
b := hash.Sum(nil)
calcurateDigest := "SHA-256=" + base64.StdEncoding.EncodeToString(b)
if givenDigest != calcurateDigest {
return nil, nil, nil, errors.New("Digest header is mismatch")
}
var activity activitypub.Activity
err = json.Unmarshal(body, &activity)
if err != nil {
return nil, nil, nil, err
}
return &activity, remoteActor, body, nil
}

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package main
import (
"encoding/json"
"errors"
"fmt"
"net/http"
"net/url"
"strings"
"unsafe"
"github.com/RichardKnop/machinery/v1/tasks"
"github.com/yukimochi/Activity-Relay/ActivityPub"
)
func handleWebfinger(w http.ResponseWriter, r *http.Request) {
resource := r.URL.Query()["resource"]
if r.Method == "GET" && len(resource) == 0 {
w.WriteHeader(400)
w.Write(nil)
} else {
request := resource[0]
if request == WebfingerResource.Subject {
wfresource, err := json.Marshal(&WebfingerResource)
if err != nil {
panic(err)
}
w.Header().Add("Content-Type", "application/json")
w.WriteHeader(200)
w.Write(wfresource)
} else {
w.WriteHeader(404)
w.Write(nil)
}
}
}
func handleActor(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" {
actor, err := json.Marshal(&Actor)
if err != nil {
panic(err)
}
w.Header().Add("Content-Type", "application/activity+json")
w.WriteHeader(200)
w.Write(actor)
} else {
w.WriteHeader(400)
w.Write(nil)
}
}
func contains(entries interface{}, finder string) bool {
switch entry := entries.(type) {
case string:
return entry == finder
case []string:
for i := 0; i < len(entry); i++ {
if entry[i] == finder {
return true
}
}
return false
}
return false
}
func pushRelayJob(sourceInbox string, body []byte) {
receivers, _ := RedClient.Keys("subscription:*").Result()
for _, receiver := range receivers {
if sourceInbox != strings.Replace(receiver, "subscription:", "", 1) {
inboxURL, _ := RedClient.HGet(receiver, "inbox_url").Result()
job := &tasks.Signature{
Name: "relay",
RetryCount: 0,
Args: []tasks.Arg{
{
Name: "inboxURL",
Type: "string",
Value: inboxURL,
},
{
Name: "body",
Type: "string",
Value: *(*string)(unsafe.Pointer(&body)),
},
},
}
_, err := MacServer.SendTask(job)
if err != nil {
fmt.Println(err)
}
}
}
}
func pushRegistorJob(inboxURL string, body []byte) {
job := &tasks.Signature{
Name: "registor",
RetryCount: 25,
Args: []tasks.Arg{
{
Name: "inboxURL",
Type: "string",
Value: inboxURL,
},
{
Name: "body",
Type: "string",
Value: *(*string)(unsafe.Pointer(&body)),
},
},
}
_, err := MacServer.SendTask(job)
if err != nil {
fmt.Println(err)
}
}
func followAcceptable(activity *activitypub.Activity, actor *activitypub.Actor) error {
if contains(activity.Object, "https://www.w3.org/ns/activitystreams#Public") {
return nil
} else {
return errors.New("Follow only allowed for https://www.w3.org/ns/activitystreams#Public")
}
}
func suitableFollow(activity *activitypub.Activity, actor *activitypub.Actor) bool {
domain, _ := url.Parse(activity.Actor)
receivers, _ := RedClient.Exists("blocked_domain:" + domain.Host).Result()
if receivers != 0 {
return false
}
return true
}
func relayAcceptable(activity *activitypub.Activity, actor *activitypub.Actor) error {
if !contains(activity.To, "https://www.w3.org/ns/activitystreams#Public") && !contains(activity.Cc, "https://www.w3.org/ns/activitystreams#Public") {
return errors.New("Activity should contain https://www.w3.org/ns/activitystreams#Public as receiver")
}
domain, _ := url.Parse(activity.Actor)
receivers, _ := RedClient.Exists("subscription:" + domain.Host).Result()
if receivers == 0 {
return errors.New("To use the relay service, Subscribe me in advance")
}
return nil
}
func suitableRelay(activity *activitypub.Activity, actor *activitypub.Actor) bool {
domain, _ := url.Parse(activity.Actor)
receivers, _ := RedClient.Exists("limited_domain:" + domain.Host).Result()
if receivers != 0 {
return false
}
return true
}
func handleInbox(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case "POST":
activity, actor, body, err := decodeActivity(r)
if err != nil {
w.WriteHeader(400)
w.Write(nil)
} else {
switch activity.Type {
case "Follow":
err = followAcceptable(activity, actor)
if err != nil {
w.WriteHeader(400)
w.Write([]byte(err.Error()))
} else {
domain, _ := url.Parse(activity.Actor)
var responseType string
if suitableFollow(activity, actor) {
responseType = "Accept"
RedClient.HSet("subscription:"+domain.Host, "inbox_url", actor.Endpoints.SharedInbox)
} else {
responseType = "Reject"
}
resp := activitypub.GenerateActivityResponse(Hostname, domain, responseType, *activity)
jsonData, _ := json.Marshal(&resp)
go pushRegistorJob(actor.Inbox, jsonData)
fmt.Println(responseType+" Follow Request : ", activity.Actor)
w.WriteHeader(202)
w.Write(nil)
}
case "Undo":
nestedActivity, _ := activitypub.DescribeNestedActivity(activity.Object)
if nestedActivity.Type == "Follow" && nestedActivity.Actor == activity.Actor {
domain, _ := url.Parse(activity.Actor)
RedClient.Del("subscription:" + domain.Host)
fmt.Println("Accept Unfollow Request : ", activity.Actor)
w.WriteHeader(202)
w.Write(nil)
} else {
err = relayAcceptable(activity, actor)
if err != nil {
w.WriteHeader(400)
w.Write([]byte(err.Error()))
} else {
domain, _ := url.Parse(activity.Actor)
go pushRelayJob(domain.Host, body)
fmt.Println("Accept Relay Status : ", activity.Actor)
w.WriteHeader(202)
w.Write(nil)
}
}
case "Create", "Update", "Delete", "Announce":
err = relayAcceptable(activity, actor)
if err != nil {
w.WriteHeader(400)
w.Write([]byte(err.Error()))
} else {
if suitableRelay(activity, actor) {
domain, _ := url.Parse(activity.Actor)
go pushRelayJob(domain.Host, body)
fmt.Println("Accept Relay Status : ", activity.Actor)
} else {
fmt.Println("Skipping Relay Status : ", activity.Actor)
}
w.WriteHeader(202)
w.Write(nil)
}
}
}
default:
w.WriteHeader(404)
w.Write(nil)
}
}

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package main
import (
"crypto/rsa"
"fmt"
"net/http"
"net/url"
"os"
"github.com/RichardKnop/machinery/v1"
"github.com/RichardKnop/machinery/v1/config"
"github.com/go-redis/redis"
"github.com/yukimochi/Activity-Relay/ActivityPub"
"github.com/yukimochi/Activity-Relay/KeyLoader"
)
var Hostname *url.URL
var Hostkey *rsa.PrivateKey
var RedClient *redis.Client
var MacServer *machinery.Server
// Actor : Relay's Actor
var Actor activitypub.Actor
// WebfingerResource : Relay's Webfinger resource
var WebfingerResource activitypub.WebfingerResource
func main() {
pemPath := os.Getenv("ACTOR_PEM")
if pemPath == "" {
panic("Require ACTOR_PEM environment variable.")
}
relayDomain := os.Getenv("RELAY_DOMAIN")
if relayDomain == "" {
panic("Require RELAY_DOMAIN environment variable.")
}
relayBind := os.Getenv("RELAY_BIND")
if relayBind == "" {
relayBind = "0.0.0.0:8080"
}
redisURL := os.Getenv("REDIS_URL")
if redisURL == "" {
redisURL = "127.0.0.1:6379"
}
var err error
Hostkey, err = keyloader.ReadPrivateKeyRSAfromPath(pemPath)
if err != nil {
panic("Can't read Hostkey Pemfile")
}
Hostname, err = url.Parse("https://" + relayDomain)
if err != nil {
panic("Can't parse Relay Domain")
}
RedClient = redis.NewClient(&redis.Options{
Addr: redisURL,
})
var macConfig = &config.Config{
Broker: "redis://" + redisURL,
DefaultQueue: "relay",
ResultBackend: "redis://" + redisURL,
ResultsExpireIn: 5,
}
MacServer, err = machinery.NewServer(macConfig)
if err != nil {
fmt.Println(err)
}
Actor = activitypub.GenerateActor(Hostname, &Hostkey.PublicKey)
WebfingerResource = activitypub.GenerateWebfingerResource(Hostname, &Actor)
http.HandleFunc("/.well-known/webfinger", handleWebfinger)
http.HandleFunc("/actor", handleActor)
http.HandleFunc("/inbox", handleInbox)
fmt.Println("Welcome to YUKIMOCHI Activity-Relay [Server]\n - Configrations")
fmt.Println("RELAY DOMAIN : ", relayDomain)
fmt.Println("REDIS URL : ", redisURL)
fmt.Println("BIND ADDRESS : ", relayBind)
http.ListenAndServe(relayBind, nil)
}

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# Activity Relay Server
## Yet another powerful customizable ActivityPub relay server written in Go.
![Powered by Ayame](docs/ayame.png)
## Packages
- `github.com/yukimochi/Activity-Relay`
- `github.com/yukimochi/Activity-Relay/worker`
## Requirements
- [Redis](https://github.com/antirez/redis)
## Environment Variable
- `ACTOR_PEM` (ex. `/actor.pem`)
- `RELAY_DOMAIN` (ex. `relay.toot.yukimochi.jp`)
- `RELAY_BIND` (ex. `0.0.0.0:8080`)
- `REDIS_URL` (ex. `127.0.0.1:6379`)

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package main
import (
"crypto/rsa"
"fmt"
"net/url"
"os"
"unsafe"
"github.com/RichardKnop/machinery/v1"
"github.com/RichardKnop/machinery/v1/config"
"github.com/satori/go.uuid"
"github.com/yukimochi/Activity-Relay/ActivityPub"
"github.com/yukimochi/Activity-Relay/KeyLoader"
)
// Hostname : Hostname of Relay
var Hostname *url.URL
// Hostkey : PrivateKey of Relay
var Hostkey *rsa.PrivateKey
// Actor : Relay's Actor
var Actor activitypub.Actor
func relayActivity(args ...string) error {
inboxURL := args[0]
body := args[1]
err := activitypub.SendActivity(inboxURL, Actor.ID, *(*[]byte)(unsafe.Pointer(&body)), Hostkey)
return err
}
func registorActivity(args ...string) error {
inboxURL := args[0]
body := args[1]
err := activitypub.SendActivity(inboxURL, Actor.ID, *(*[]byte)(unsafe.Pointer(&body)), Hostkey)
return err
}
func main() {
pemPath := os.Getenv("ACTOR_PEM")
if pemPath == "" {
panic("Require ACTOR_PEM environment variable.")
}
relayDomain := os.Getenv("RELAY_DOMAIN")
if relayDomain == "" {
panic("Require RELAY_DOMAIN environment variable.")
}
redisURL := os.Getenv("REDIS_URL")
if redisURL == "" {
redisURL = "127.0.0.1:6379"
}
var err error
Hostkey, err = keyloader.ReadPrivateKeyRSAfromPath(pemPath)
if err != nil {
panic("Can't read Hostkey Pemfile")
}
Hostname, err = url.Parse("https://" + relayDomain)
if err != nil {
panic("Can't parse Relay Domain")
}
Actor = activitypub.GenerateActor(Hostname, &Hostkey.PublicKey)
var macConfig = &config.Config{
Broker: "redis://" + redisURL,
DefaultQueue: "relay",
ResultBackend: "redis://" + redisURL,
ResultsExpireIn: 5,
}
server, err := machinery.NewServer(macConfig)
if err != nil {
panic(err.Error())
}
err = server.RegisterTask("registor", registorActivity)
if err != nil {
panic(err.Error())
}
err = server.RegisterTask("relay", relayActivity)
if err != nil {
panic(err.Error())
}
workerID := uuid.NewV4()
worker := server.NewWorker(workerID.String(), 200)
fmt.Println("Welcome to YUKIMOCHI Activity-Relay [Worker]\n - Configrations")
fmt.Println("RELAY DOMAIN : ", relayDomain)
fmt.Println("REDIS URL : ", redisURL)
err = worker.Launch()
if err != nil {
fmt.Println(err.Error())
}
}