feat: add addFromURL method

License: MIT
Signed-off-by: Alan Shaw <alan.shaw@protocol.ai>

Author: Alan Shaw

package.json

@@ -10,10 +10,11 @@
   "browser": {
     "./src/core/components/init-assets.js": false,
     "./src/core/runtime/config-nodejs.js": "./src/core/runtime/config-browser.js",
+    "./src/core/runtime/dns-nodejs.js": "./src/core/runtime/dns-browser.js",
+    "./src/core/runtime/fetch-nodejs.js": "./src/core/runtime/fetch-browser.js",
     "./src/core/runtime/libp2p-nodejs.js": "./src/core/runtime/libp2p-browser.js",
     "./src/core/runtime/preload-nodejs.js": "./src/core/runtime/preload-browser.js",
     "./src/core/runtime/repo-nodejs.js": "./src/core/runtime/repo-browser.js",
-    "./src/core/runtime/dns-nodejs.js": "./src/core/runtime/dns-browser.js",
     "./test/utils/create-repo-nodejs.js": "./test/utils/create-repo-browser.js",
     "stream": "readable-stream",
     "joi": "joi-browser"
@@ -149,6 +150,7 @@
     "multibase": "~0.6.0",
     "multihashes": "~0.4.14",
     "multihashing-async": "~0.5.1",
+    "node-fetch": "^2.3.0",
     "once": "^1.4.0",
     "peer-book": "~0.8.0",
     "peer-id": "~0.12.0",

src/core/components/files-regular/add-from-url.js

@@ -0,0 +1,41 @@
+'use-strict'
+
+const { URL } = require('url')
+const fetch = require('../../runtime/fetch-nodejs')
+
+module.exports = (self) => {
+  return async (url, options, callback) => {
+    if (typeof options === 'function') {
+      callback = options
+      options = {}
+    }
+
+    let files
+
+    try {
+      const parsedUrl = new URL(url)
+      const res = await fetch(url)
+
+      if (!res.ok) {
+        throw new Error('unexpected status code: ' + res.status)
+      }
+
+      // TODO: use res.body when supported
+      const content = Buffer.from(await res.arrayBuffer())
+      const path = decodeURIComponent(parsedUrl.pathname.split('/').pop())
+
+      files = await self.add({ content, path }, options)
+    } catch (err) {
+      if (callback) {
+        return callback(err)
+      }
+      throw err
+    }
+
+    if (callback) {
+      callback(null, files)
+    }
+
+    return files
+  }
+}

src/core/components/files-regular/index.js

@@ -2,6 +2,7 @@
 
 module.exports = self => ({
   add: require('./add')(self),
+  addFromURL: require('./add-from-url')(self),
   addPullStream: require('./add-pull-stream')(self),
   addReadableStream: require('./add-readable-stream')(self),
   cat: require('./cat')(self),

src/core/runtime/fetch-browser.js

@@ -0,0 +1,3 @@
+/* eslint-env browser */
+'use strict'
+module.exports = fetch

src/core/runtime/fetch-nodejs.js

@@ -0,0 +1,2 @@
+'use strict'
+module.exports = require('node-fetch')

test/core/interface.spec.js

@@ -79,15 +79,22 @@ describe('interface-ipfs-core tests', () => {
   })
 
   tests.filesRegular(defaultCommonFactory, {
-    skip: [{
+    only: ['addFromUrl'],
+    skip: isNode ? [{
       name: 'addFromStream',
       reason: 'TODO: not implemented yet'
     }, {
       name: 'addFromFs',
       reason: 'TODO: not implemented yet'
+    }] : [{
+      name: 'addFromStream',
+      reason: 'Not designed to run in the browser'
+    }, {
+      name: 'addFromFs',
+      reason: 'Not designed to run in the browser'
     }, {
       name: 'addFromUrl',
-      reason: 'TODO: not implemented yet'
+      reason: 'Not designed to run in the browser'
     }]
   })