Changes required for #968 feat/Gateway (#989)

* feat: add gateway route to daemon

* feat: adding Gateway endeavour - improve codebase

* clean up, remove commented out lines. (#971)

* clean up, remove commented out lines.

* cleaning code, removing commented out blocks.

* gateway initial tests.

* clean up , working tests on node v8.4.0

License: MIT
Signed-off-by: Yahya <ya7yaz@gmail.com>

* fix using js-ipfs-repo in gateway tests.

License: MIT
Signed-off-by: Yahya <ya7yaz@gmail.com>

* Using unix-fs to detect dirs, replacing object.get with DAG.get, CID checks

License: MIT
Signed-off-by: Yahya <ya7yaz@gmail.com>

* rename checkHash -> checkCID

License: MIT
Signed-off-by: Yahya <ya7yaz@gmail.com>

* gateway tests: init a fresh repo

src/http/gateway/resolver.js

@@ -3,10 +3,11 @@
 const mh = require('multihashes')
 const promisify = require('promisify-es6')
 const eachOfSeries = require('async/eachOfSeries')
+const CID = require('cids')
+const Unixfs = require('ipfs-unixfs')
 const debug = require('debug')
 const log = debug('jsipfs:http-gateway:resolver')
 log.error = debug('jsipfs:http-gateway:resolver:error')
-
 const html = require('./utils/html')
 const PathUtil = require('./utils/path')
 
@@ -41,32 +42,31 @@ const resolveMultihash = promisify((ipfs, path, callback) => {
   const partsLength = parts.length
 
   let currentMultihash = parts[0]
-
+  let currentCid
   eachOfSeries(parts, (multihash, currentIndex, next) => {
-    // throws error when invalid multihash is passed
-    mh.validate(mh.fromB58String(currentMultihash))
+    // throws error when invalid CID is passed
+    try {
+      currentCid = new CID(mh.fromB58String(currentMultihash))
+    } catch (e) {
+      if (e) throw e
+    }
+
     log('currentMultihash: ', currentMultihash)
     log('currentIndex: ', currentIndex, '/', partsLength)
 
-    ipfs.object.get(currentMultihash, { enc: 'base58' }, (err, dagNode) => {
+    ipfs.dag.get(currentCid, (err, result) => {
       if (err) { return next(err) }
+      let dagNode = result.value
 
       if (currentIndex === partsLength - 1) {
-        // leaf node
-        log('leaf node: ', currentMultihash)
-
-        // TODO: Check if it is a directory by using Unixfs Type, right now
-        // it won't detect empty dirs
-        if (dagNode.links &&
-            dagNode.links.length > 0 &&
-            dagNode.links[0].name.length > 0) {
-          //  this is a directory.
-
+        let dagDataObj = Unixfs.unmarshal(dagNode.data)
+        if (dagDataObj.type === 'directory') {
           let isDirErr = new Error('This dag node is a directory')
           // add currentMultihash as a fileName so it can be used by resolveDirectory
           isDirErr.fileName = currentMultihash
           return next(isDirErr)
         }
+
         return next()
       }
 

src/http/gateway/resources/gateway.js

@@ -12,16 +12,16 @@ const PathUtils = require('../utils/path')
 const Stream = require('stream')
 
 module.exports = {
-  checkHash: (request, reply) => {
-    if (!request.params.hash) {
+  checkCID: (request, reply) => {
+    if (!request.params.cid) {
       return reply({
         Message: 'Path Resolve error: path must contain at least one component',
         Code: 0
       }).code(400).takeover()
     }
 
     return reply({
-      ref: `/ipfs/${request.params.hash}`
+      ref: `/ipfs/${request.params.cid}`
     })
   },
   handler: (request, reply) => {

src/http/gateway/routes/gateway.js

@@ -7,10 +7,10 @@ module.exports = (server) => {
 
   gateway.route({
     method: '*',
-    path: '/ipfs/{hash*}',
+    path: '/ipfs/{cid*}',
     config: {
       pre: [
-        { method: resources.gateway.checkHash, assign: 'args' }
+        { method: resources.gateway.checkCID, assign: 'args' }
       ],
       handler: resources.gateway.handler
     }

test/gateway/index.js

@@ -6,34 +6,23 @@ const dirtyChai = require('dirty-chai')
 const expect = chai.expect
 chai.use(dirtyChai)
 const API = require('../../src/http')
-const ncp = require('ncp').ncp
-const path = require('path')
-const clean = require('../utils/clean')
-
-describe('HTTP GATEWAY', () => {
-  const repoExample = path.join(__dirname, '../go-ipfs-repo')
-  const repoTests = path.join(__dirname, '../repo-tests-run')
 
+describe('HTTP Gateway', () => {
   let http = {}
   let gateway
 
   before((done) => {
-    http.api = new API(repoTests)
-
-    ncp(repoExample, repoTests, (err) => {
-      expect(err).to.not.exist()
+    http.api = new API()
 
-      http.api.start(false, () => {
-        gateway = http.api.server.select('Gateway')
-        done()
-      })
+    http.api.start(true, () => {
+      gateway = http.api.server.select('Gateway')
+      done()
     })
   })
 
   after((done) => {
     http.api.stop((err) => {
       expect(err).to.not.exist()
-      clean(repoTests)
       done()
     })
   })
@@ -67,7 +56,7 @@ describe('HTTP GATEWAY', () => {
         url: '/ipfs/QmT78zSuBmuS4z925WZfrqQ1qHaJ56DQaTfyMUF7F8ff5o'
       }, (res) => {
         expect(res.statusCode).to.equal(200)
-        expect(res.rawPayload).to.deep.equal(new Buffer('hello world' + '\n'))
+        expect(res.rawPayload).to.deep.equal(Buffer.from('hello world' + '\n'))
         expect(res.payload).to.equal('hello world' + '\n')
         done()
       })