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