diff -r 000000000000 -r 6474c204b198 dom/apps/tests/signed_app.sjs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/apps/tests/signed_app.sjs	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,111 @@
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+var Cu = Components.utils;
+
+// From prio.h
+const PR_RDWR        = 0x04;
+const PR_CREATE_FILE = 0x08;
+const PR_TRUNCATE    = 0x20;
+
+const CUR_WORK_DIR = "CurWorkD";
+
+Cu.import("resource://gre/modules/NetUtil.jsm");
+
+var gBasePath = "tests/dom/apps/tests/";
+var gMiniManifestTemplate = "signed_app_template.webapp";
+var gAppName = "Simple App";
+var gDevName = "David Clarke";
+var gDevUrl = "http://dev.url";
+
+function handleRequest(request, response) {
+  var query = getQuery(request);
+
+  response.setHeader("Access-Control-Allow-Origin", "*", false);
+
+  var version = ("version" in query) ? query.version : "1";
+  var app = ("app" in query) ? query.app : "valid";
+  var prevVersion = getState("version");
+
+  if (version != prevVersion) {
+    setState("version", version);
+  }
+  var packageName = app + "_app_" + version + ".zip";
+  setState("packageName", packageName);
+  var packagePath = "/" + gBasePath + "signed/" + packageName;
+  setState("packagePath", packagePath);
+  var packageSize = readSize(packagePath);
+
+  var etag = getEtag(request, version);
+
+  if (etagMatches(request, etag)) {
+    dump("Etags Match. Sending 304\n");
+    response.setStatusLine(request.httpVersion, "304", "Not modified");
+    return;
+  }
+  response.setHeader("Etag", etag, false);
+
+  // Serve the mini-manifest corresponding to the requested app version.
+  var template = gBasePath + gMiniManifestTemplate;
+
+  response.setHeader("Content-Type",
+                     "application/x-web-app-manifest+json", false);
+  var manifest = makeResource(template, version, packagePath, packageSize,
+                              gAppName, gDevName, gDevUrl);
+  response.write(manifest);
+}
+
+function getQuery(request) {
+  var query = {};
+  request.queryString.split('&').forEach(function (val) {
+    var [name, value] = val.split('=');
+    query[decodeURIComponent(name)] = decodeURIComponent(value);
+  });
+  return query;
+}
+
+function getEtag(request, version) {
+  return request.queryString.replace(/[&=]/g, '-') + '-' + version;
+}
+
+function etagMatches(request, etag) {
+  return request.hasHeader("If-None-Match") &&
+         request.getHeader("If-None-Match") == etag;
+}
+
+// File and resources helpers
+
+function readSize(path) {
+  var file = Cc["@mozilla.org/file/directory_service;1"].
+               getService(Ci.nsIProperties).get(CUR_WORK_DIR, Ci.nsILocalFile);
+  var split = path.split("/");
+  for (var i = 0; i < split.length; ++i) {
+    file.append(split[i]);
+  }
+  return file.fileSize;
+}
+
+function readFile(path) {
+  var file = Cc["@mozilla.org/file/directory_service;1"]
+             .getService(Ci.nsIProperties)
+             .get(CUR_WORK_DIR, Ci.nsILocalFile);
+  var fstream = Cc["@mozilla.org/network/file-input-stream;1"]
+                .createInstance(Ci.nsIFileInputStream);
+  var split = path.split("/");
+  for (var i = 0; i < split.length; ++i) {
+    file.append(split[i]);
+  }
+  fstream.init(file, -1, 0, 0);
+  var data = NetUtil.readInputStreamToString(fstream, fstream.available());
+  fstream.close();
+  return data;
+}
+
+function makeResource(templatePath, version, packagePath, packageSize,
+                      appName, developerName, developerUrl) {
+  var res = readFile(templatePath).
+              replace(/VERSIONTOKEN/g, version).
+              replace(/PACKAGEPATHTOKEN/g, packagePath).
+              replace(/PACKAGESIZETOKEN/g, packageSize).
+              replace(/NAMETOKEN/g, appName);
+  return res;
+}