draft: refactor project so it sits on top of a standalone app

2020-05-11 15:34:47 +02:00
parent a9ee5acc1c
commit f97e8455fc
13068 changed files with 1735502 additions and 866 deletions
@@ -0,0 +1,102 @@
+'use strict';
+
+var urlUtils = require('./utils/url')
+  , eventUtils = require('./utils/event')
+  , JSON3 = require('json3')
+  , FacadeJS = require('./facade')
+  , InfoIframeReceiver = require('./info-iframe-receiver')
+  , iframeUtils = require('./utils/iframe')
+  , loc = require('./location')
+  ;
+
+var debug = function() {};
+if (process.env.NODE_ENV !== 'production') {
+  debug = require('debug')('sockjs-client:iframe-bootstrap');
+}
+
+module.exports = function(SockJS, availableTransports) {
+  var transportMap = {};
+  availableTransports.forEach(function(at) {
+    if (at.facadeTransport) {
+      transportMap[at.facadeTransport.transportName] = at.facadeTransport;
+    }
+  });
+
+  // hard-coded for the info iframe
+  // TODO see if we can make this more dynamic
+  transportMap[InfoIframeReceiver.transportName] = InfoIframeReceiver;
+  var parentOrigin;
+
+  /* eslint-disable camelcase */
+  SockJS.bootstrap_iframe = function() {
+    /* eslint-enable camelcase */
+    var facade;
+    iframeUtils.currentWindowId = loc.hash.slice(1);
+    var onMessage = function(e) {
+      if (e.source !== parent) {
+        return;
+      }
+      if (typeof parentOrigin === 'undefined') {
+        parentOrigin = e.origin;
+      }
+      if (e.origin !== parentOrigin) {
+        return;
+      }
+
+      var iframeMessage;
+      try {
+        iframeMessage = JSON3.parse(e.data);
+      } catch (ignored) {
+        debug('bad json', e.data);
+        return;
+      }
+
+      if (iframeMessage.windowId !== iframeUtils.currentWindowId) {
+        return;
+      }
+      switch (iframeMessage.type) {
+      case 's':
+        var p;
+        try {
+          p = JSON3.parse(iframeMessage.data);
+        } catch (ignored) {
+          debug('bad json', iframeMessage.data);
+          break;
+        }
+        var version = p[0];
+        var transport = p[1];
+        var transUrl = p[2];
+        var baseUrl = p[3];
+        debug(version, transport, transUrl, baseUrl);
+        // change this to semver logic
+        if (version !== SockJS.version) {
+          throw new Error('Incompatible SockJS! Main site uses:' +
+                    ' "' + version + '", the iframe:' +
+                    ' "' + SockJS.version + '".');
+        }
+
+        if (!urlUtils.isOriginEqual(transUrl, loc.href) ||
+            !urlUtils.isOriginEqual(baseUrl, loc.href)) {
+          throw new Error('Can\'t connect to different domain from within an ' +
+                    'iframe. (' + loc.href + ', ' + transUrl + ', ' + baseUrl + ')');
+        }
+        facade = new FacadeJS(new transportMap[transport](transUrl, baseUrl));
+        break;
+      case 'm':
+        facade._send(iframeMessage.data);
+        break;
+      case 'c':
+        if (facade) {
+          facade._close();
+        }
+        facade = null;
+        break;
+      }
+    };
+
+    eventUtils.attachEvent('message', onMessage);
+
+    // Start
+    iframeUtils.postMessage('s');
+  };
+};