git ssb

1
'use strict'
2
var ref = require('ssb-ref')
3
var Stack = require('stack')
4
var BlobsHttp = require('multiblob-http')
5
var pull = require('pull-stream')
6
var URL = require('url')
7
var Emoji = require('emoji-server')
8
9
function send(res, obj) {
10
  res.writeHead(200, {'Content-Type': 'application/json'})
11
  res.end(JSON.stringify(obj, null, 2))
12
}
13
14
var BoxStream = require('pull-box-stream')
15
var zeros = new Buffer(24); zeros.fill(0)
16
17
module.exports = function (sbot, layers) {
18
  var prefix = '/blobs'
19
  return Stack(
20
    function (req, res, next) {
21
      Stack.compose.apply(null, layers)(req, res, next)
22
    },
23
    Emoji('/img/emoji'),
24
    //blobs are served over CORS, so you can get blobs from any pub.
25
    /*function (req, res, next) {
26
      res.setHeader('Access-Control-Allow-Origin', '*')
27
      res.setHeader("Access-Control-Allow-Headers",
28
      "Authorization, Content-Type, If-Match, If-Modified-Since, If-None-Match, If-Unmodified-Since");
29
      res.setHeader("Access-Control-Allow-Methods", "GET", "HEAD");
30
      next()
31
    },*/
32
    function (req, res, next) {
33
      var id
34
      try { id = decodeURIComponent(req.url.substring(5)) }
35
      catch (_) { id = req.url.substring(5) }
36
      if(req.url.substring(0, 5) !== '/msg/' || !ref.isMsg(id)) return next()
37
38
      sbot.get(id, function (err, msg) {
39
        if(err) return next(err)
40
        send(res, {key: id, value: msg})
41
      })
42
    },
43
    function (req, res, next) {
44
      if(!(req.method === "GET" || req.method == 'HEAD')) return next()
45
46
      var u = URL.parse('http://makeurlparseright.com'+req.url)
47
      var hash = decodeURIComponent(u.pathname.substring((prefix+'/get/').length))
48
      //check if we don't already have this, tell blobs we want it, if necessary.
49
      sbot.blobs.has(hash, function (err, has) {
50
        if(has) next()
51
        else sbot.blobs.want(hash, function (err, has) { next() })
52
      })
53
    },
54
    BlobsHttp(sbot.blobs, prefix, {size: false, transform: function (q) {
55
      if(q.unbox && /\.boxs$/.test(q.unbox)) {
56
        var key = new Buffer(q.unbox.replace(/\s/g, '+'), 'base64')
57
        if(key.length !== 32)
58
            return function (read) {
59
              return function (abort, cb) {
60
                read(new Error('key must be 32 bytes long'), cb)
61
              }
62
            }
63
        return BoxStream.createUnboxStream(
64
          new Buffer(key, 'base64'),
65
          zeros
66
        )
67
      }
68
      return pull.through()
69
    }})
70
  )
71
}
72
73
74
75
76
77
78