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// Copyright (c) 2012 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/webui/shared_resources_data_source.h"
#include <stddef.h>
#include "base/containers/hash_tables.h"
#include "base/logging.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_restrictions.h"
#include "content/public/common/content_client.h"
#include "content/public/common/url_constants.h"
#include "net/base/mime_util.h"
#include "ui/base/layout.h"
#include "ui/base/webui/web_ui_util.h"
#include "ui/resources/grit/webui_resources.h"
#include "ui/resources/grit/webui_resources_map.h"
namespace content {
namespace {
using ResourcesMap = base::hash_map<std::string, int>;
// TODO(rkc): Once we have a separate source for apps, remove '*/apps/' aliases.
const char* kPathAliases[][2] = {
{"../../../third_party/polymer/v1_0/components-chromium/", "polymer/v1_0/"},
{"../../../third_party/web-animations-js/sources/",
"polymer/v1_0/web-animations-js/"},
{"../../views/resources/default_100_percent/common/", "images/apps/"},
{"../../views/resources/default_200_percent/common/", "images/2x/apps/"},
{"../../webui/resources/cr_elements/", "cr_elements/"}};
void AddResource(const std::string& path,
int resource_id,
ResourcesMap* resources_map) {
if (!resources_map->insert(std::make_pair(path, resource_id)).second)
NOTREACHED() << "Redefinition of '" << path << "'";
}
const ResourcesMap* CreateResourcesMap() {
ResourcesMap* result = new ResourcesMap();
for (size_t i = 0; i < kWebuiResourcesSize; ++i) {
const std::string resource_name = kWebuiResources[i].name;
const int resource_id = kWebuiResources[i].value;
AddResource(resource_name, resource_id, result);
for (const char* (&alias)[2]: kPathAliases) {
if (base::StartsWith(resource_name, alias[0],
base::CompareCase::SENSITIVE)) {
AddResource(alias[1] + resource_name.substr(strlen(alias[0])),
resource_id, result);
}
}
}
return result;
}
const ResourcesMap& GetResourcesMap() {
// This pointer will be intentionally leaked on shutdown.
static const ResourcesMap* resources_map = CreateResourcesMap();
return *resources_map;
}
} // namespace
SharedResourcesDataSource::SharedResourcesDataSource() {
}
SharedResourcesDataSource::~SharedResourcesDataSource() {
}
std::string SharedResourcesDataSource::GetSource() const {
return kChromeUIResourcesHost;
}
void SharedResourcesDataSource::StartDataRequest(
const std::string& path,
int render_process_id,
int render_frame_id,
const URLDataSource::GotDataCallback& callback) {
const ResourcesMap& resources_map = GetResourcesMap();
auto it = resources_map.find(path);
int idr = (it != resources_map.end()) ? it->second : -1;
DCHECK_NE(-1, idr) << " path: " << path;
scoped_refptr<base::RefCountedMemory> bytes;
if (idr == IDR_WEBUI_CSS_TEXT_DEFAULTS) {
std::string css = webui::GetWebUiCssTextDefaults();
bytes = base::RefCountedString::TakeString(&css);
} else if (idr == IDR_WEBUI_CSS_TEXT_DEFAULTS_MD) {
std::string css = webui::GetWebUiCssTextDefaultsMd();
bytes = base::RefCountedString::TakeString(&css);
} else {
bytes = GetContentClient()->GetDataResourceBytes(idr);
}
callback.Run(bytes.get());
}
std::string SharedResourcesDataSource::GetMimeType(
const std::string& path) const {
// Requests should not block on the disk! On POSIX this goes to disk.
// http://code.google.com/p/chromium/issues/detail?id=59849
base::ThreadRestrictions::ScopedAllowIO allow_io;
std::string mime_type;
net::GetMimeTypeFromFile(base::FilePath().AppendASCII(path), &mime_type);
return mime_type;
}
std::string
SharedResourcesDataSource::GetAccessControlAllowOriginForOrigin(
const std::string& origin) const {
// For now we give access only for "chrome://*" origins.
// According to CORS spec, Access-Control-Allow-Origin header doesn't support
// wildcards, so we need to set its value explicitly by passing the |origin|
// back.
std::string allowed_origin_prefix = kChromeUIScheme;
allowed_origin_prefix += "://";
if (origin.find(allowed_origin_prefix) != 0)
return "null";
return origin;
}
} // namespace content
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