Store the service worker script and its imports on first load... kinda

content/browser/service_worker/service_worker_context_request_handler.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/service_worker/service_worker_context_request_handler.h"
 
+#include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_provider_host.h"
 #include "content/browser/service_worker/service_worker_read_from_cache_job.h"
+#include "content/browser/service_worker/service_worker_storage.h"
 #include "content/browser/service_worker/service_worker_version.h"
+#include "content/browser/service_worker/service_worker_write_to_cache_job.h"
 #include "net/url_request/url_request.h"
 
 namespace content {
 
 ServiceWorkerContextRequestHandler::ServiceWorkerContextRequestHandler(
     base::WeakPtr<ServiceWorkerContextCore> context,
     base::WeakPtr<ServiceWorkerProviderHost> provider_host,
     ResourceType::Type resource_type)
     : ServiceWorkerRequestHandler(context, provider_host, resource_type),
       version_(provider_host_->running_hosted_version()) {
   DCHECK(provider_host_->IsHostToRunningServiceWorker());
 }
 
 ServiceWorkerContextRequestHandler::~ServiceWorkerContextRequestHandler() {
 }
 
 net::URLRequestJob* ServiceWorkerContextRequestHandler::MaybeCreateJob(
     net::URLRequest* request,
     net::NetworkDelegate* network_delegate) {
-  if (!provider_host_ || !version_)
+  if (!provider_host_ || !version_ || !context_)
+    return NULL;
+
+  if (request->url_chain().size() > 1)
     return NULL;

[kinuko, 2014/05/08 08:00:24]

Is this to abort (fall back to net) redirected requests?

[michaeln, 2014/05/08 22:27:24]

This is to always send redirected requests thru the network. At least for now,
there's no case where this class needs to create a custom job when redirection
is involved.

 
   // We only use the script cache for main script loading and
   // importScripts(), even if a cached script is xhr'd, we don't
   // retrieve it from the script cache.
   // TODO(michaeln): Get the desired behavior clarified in the spec,
   // and make tweak the behavior here to match.
   if (resource_type_ != ResourceType::SERVICE_WORKER &&
       resource_type_ != ResourceType::SCRIPT) {
     return NULL;
   }
 
   if (ShouldAddToScriptCache(request->url())) {
-    return NULL;
-    // TODO(michaeln): return new ServiceWorkerWriteToCacheJob();
+    int64 response_id = context_->storage()->NewResourceId();
+    if (response_id == kInvalidServiceWorkerResponseId)
+      return NULL;
+    version_->AddToScriptCache(request->url(), response_id);
+    return new ServiceWorkerWriteToCacheJob(
+        request, network_delegate, context_, version_, response_id);
   }
 
   int64 response_id = kInvalidServiceWorkerResponseId;
   if (ShouldReadFromScriptCache(request->url(), &response_id)) {
     return new ServiceWorkerReadFromCacheJob(
         request, network_delegate, context_, response_id);
   }
 
   // NULL means use the network.
   return NULL;
 }
 
 bool ServiceWorkerContextRequestHandler::ShouldAddToScriptCache(
     const GURL& url) {
-  // TODO(michaeln): Ensure the transition to INSTALLING can't
-  // happen prior to the initial eval completion.
-  if (version_->status() != ServiceWorkerVersion::NEW)
+  // TODO(michaeln): Stop caching imports after the initial eval.
+  if (version_->status() != ServiceWorkerVersion::NEW &&
+      version_->status() != ServiceWorkerVersion::INSTALLING)
     return false;
   return version_->LookupInScriptCache(url) == kInvalidServiceWorkerResponseId;
 }
 
 bool ServiceWorkerContextRequestHandler::ShouldReadFromScriptCache(
     const GURL& url, int64* response_id_out) {
   // We don't read from the script cache until the version is INSTALLED.
   if (version_->status() == ServiceWorkerVersion::NEW ||
       version_->status() == ServiceWorkerVersion::INSTALLING)
     return false;
   *response_id_out = version_->LookupInScriptCache(url);
   return *response_id_out != kInvalidServiceWorkerResponseId;
 }
 
 }  // namespace content