wip

chrome/browser/chromeos/file_request_interceptor.cc

+// Copyright 2017 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 "chrome/browser/chromeos/file_request_interceptor.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/base/filename_util.h"
+#include "net/url_request/url_request_file_job.h"
+
+namespace chromeos {
+
+namespace {
+class FileRequestJob : public net::URLRequestFileJob {
+ public:
+  FileRequestJob(net::URLRequest* request,
+                 net::NetworkDelegate* network_delegate,
+                 const base::FilePath& file_path,
+                 const scoped_refptr<base::TaskRunner>& file_task_runner)
+      : net::URLRequestFileJob(request,
+                               network_delegate,
+                               file_path,
+                               file_task_runner) {}
+
+ protected:
+  bool OnFetchMetaInfo(
+      const net::URLRequestFileJob::FileMetaInfo& meta_info) override {
+    if (network_delegate() && !network_delegate()->CanAccessFile(
+                                  *request(), meta_info.absolute_path)) {
+      NotifyStartError(net::URLRequestStatus(net::URLRequestStatus::FAILED,
+                                             net::ERR_ACCESS_DENIED));
+      return false;
+    }
+    return true;
+  }
+};
+
+}  // namespace
+
+FileRequestInterceptor::FileRequestInterceptor() {}
+
+FileRequestInterceptor::~FileRequestInterceptor() {}
+
+net::URLRequestJob* FileRequestInterceptor::MaybeInterceptRequest(
+    net::URLRequest* request,
+    net::NetworkDelegate* network_delegate) const {
+  base::FilePath file_path;
+  if (request->url().scheme() == "file" &&
+      net::FileURLToFilePath(request->url(), &file_path) &&
+      !file_path.EndsWithSeparator()) {
+    return new FileRequestJob(
+        request, network_delegate, file_path,
+        content::BrowserThread::GetBlockingPool()
+            ->GetTaskRunnerWithShutdownBehavior(
+                base::SequencedWorkerPool::SKIP_ON_SHUTDOWN));
+  } else {
+    return nullptr;
+  }
+}
+
+}  // namespace chromeos