Import w3c tests for the service workers

third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/update-worker.py

+import time
+
+def main(request, response):
+    # Set mode to 'init' for initial fetch.
+    mode = 'init'
+    if 'mode' in request.cookies:
+        mode = request.cookies['mode'].value
+
+    # no-cache itself to ensure the user agent finds a new version for each update.
+    headers = [('Cache-Control', 'no-cache, must-revalidate'),
+               ('Pragma', 'no-cache')]
+
+    content_type = ''
+    extra_body = ''
+
+    if mode == 'init':
+        # Set a normal mimetype.
+        # Set cookie value to 'normal' so the next fetch will work in 'normal' mode.
+        content_type = 'application/javascript'
+        response.set_cookie('mode', 'normal')
+    elif mode == 'normal':
+        # Set a normal mimetype.
+        # Set cookie value to 'error' so the next fetch will work in 'error' mode.
+        content_type = 'application/javascript'
+        response.set_cookie('mode', 'error');
+    elif mode == 'error':
+        # Set a disallowed mimetype.
+        # Set cookie value to 'syntax-error' so the next fetch will work in 'syntax-error' mode.
+        content_type = 'text/html'
+        response.set_cookie('mode', 'syntax-error');
+    elif mode == 'syntax-error':
+        # Set cookie value to 'throw-install' so the next fetch will work in 'throw-install' mode.
+        content_type = 'application/javascript'
+        response.set_cookie('mode', 'throw-install');
+        extra_body = 'badsyntax(isbad;'
+    elif mode == 'throw-install':
+        # Unset and delete cookie to clean up the test setting.
+        content_type = 'application/javascript'
+        response.delete_cookie('mode')
+        extra_body = "addEventListener('install', function(e) { throw new Error('boom'); });"
+
+    headers.append(('Content-Type', content_type))
+    # Return a different script for each access.  Use .time() and .clock() for
+    # best time resolution across different platforms.
+    return headers, '/* %s %s */ %s' % (time.time(), time.clock(), extra_body)
+