cleaning federation

server/federation/helpers.js

@@ -0,0 +1,54 @@
+const fetch = require('fetch')
+const request = require('request')
+const crypto = require('crypto')
+
+const Helpers = {
+  async signAndSend(message, user, domain, req, res, targetOrigin) {
+    // get the URI of the actor object and append 'inbox' to it
+    let inbox = message.object.actor+'/inbox'
+    let inboxFragment = inbox.replace(targetOrigin,'')
+    const targetDomain = new URL(targetOrigin).host
+    // get the private key
+    const privkey = user.rsa.privateKey
+    const signer = crypto.createSign('sha256')
+    let d = new Date()
+    let stringToSign = `(request-target): post ${inboxFragment}\nhost: ${targetDomain}\ndate: ${d.toUTCString()}`
+    signer.update(stringToSign)
+    signer.end()
+    const signature = signer.sign(privkey)
+    const signature_b64 = signature.toString('base64')
+    let header = `keyId="${config.baseurl}/federation/u/${user.username}",headers="(request-target) host date",signature="${signature_b64}"`
+    request({
+      url: inbox,
+      headers: {
+        'Host': targetDomain,
+        'Date': d.toUTCString(),
+        'Signature': header
+      },
+      method: 'POST',
+      json: true,
+      body: message
+    }, function (error, response){
+      if (error) {
+        console.log('Error:', error, response.body)
+      }
+      else {
+        console.log('Response:', response.body)
+      }
+    })
+    return res.status(200)
+  },
+  async sendAcceptMessage (body, user, domain, req, res, targetOrigin) {
+    const guid = crypto.randomBytes(16).toString('hex')
+    let message = {
+      '@context': 'https://www.w3.org/ns/activitystreams',
+      'id': `${config.baseurl}/federation/${guid}`,
+      'type': 'Accept',
+      'actor': `${config.baseurl}/federation/u/${user.username}`,
+      'object': body,
+    }
+    Helpers.signAndSend(message, user, domain, req, res, targetOrigin)
+  }
+}
+
+module.exports = Helpers