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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 "webkit/plugins/ppapi/url_request_info_util.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "net/http/http_util.h"
#include "ppapi/shared_impl/url_request_info_data.h"
#include "ppapi/shared_impl/var.h"
#include "ppapi/thunk/enter.h"
#include "third_party/WebKit/public/platform/WebData.h"
#include "third_party/WebKit/public/platform/WebHTTPBody.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/platform/WebURLRequest.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "url/gurl.h"
#include "url/url_util.h"
#include "webkit/child/weburlrequest_extradata_impl.h"
#include "webkit/plugins/ppapi/common.h"
#include "webkit/plugins/ppapi/plugin_module.h"
#include "webkit/plugins/ppapi/ppb_file_ref_impl.h"
#include "webkit/plugins/ppapi/resource_helper.h"
using ppapi::URLRequestInfoData;
using ppapi::Resource;
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_FileRef_API;
using WebKit::WebData;
using WebKit::WebHTTPBody;
using WebKit::WebString;
using WebKit::WebFrame;
using WebKit::WebURL;
using WebKit::WebURLRequest;
namespace webkit {
namespace ppapi {
namespace {
// Appends the file ref given the Resource pointer associated with it to the
// given HTTP body, returning true on success.
bool AppendFileRefToBody(
Resource* file_ref_resource,
int64_t start_offset,
int64_t number_of_bytes,
PP_Time expected_last_modified_time,
WebHTTPBody *http_body) {
// Get the underlying file ref impl.
if (!file_ref_resource)
return false;
PPB_FileRef_API* file_ref_api = file_ref_resource->AsPPB_FileRef_API();
if (!file_ref_api)
return false;
const PPB_FileRef_Impl* file_ref =
static_cast<PPB_FileRef_Impl*>(file_ref_api);
PluginDelegate* plugin_delegate =
ResourceHelper::GetPluginDelegate(file_ref_resource);
if (!plugin_delegate)
return false;
base::FilePath platform_path;
switch (file_ref->GetFileSystemType()) {
case PP_FILESYSTEMTYPE_LOCALTEMPORARY:
case PP_FILESYSTEMTYPE_LOCALPERSISTENT:
// TODO(kinuko): remove this sync IPC when we fully support
// AppendURLRange for FileSystem URL.
plugin_delegate->SyncGetFileSystemPlatformPath(
file_ref->GetFileSystemURL(), &platform_path);
break;
case PP_FILESYSTEMTYPE_EXTERNAL:
platform_path = file_ref->GetSystemPath();
break;
default:
NOTREACHED();
}
http_body->appendFileRange(
platform_path.AsUTF16Unsafe(),
start_offset,
number_of_bytes,
expected_last_modified_time);
return true;
}
// Checks that the request data is valid. Returns false on failure. Note that
// method and header validation is done by the URL loader when the request is
// opened, and any access errors are returned asynchronously.
bool ValidateURLRequestData(const ::ppapi::URLRequestInfoData& data) {
if (data.prefetch_buffer_lower_threshold < 0 ||
data.prefetch_buffer_upper_threshold < 0 ||
data.prefetch_buffer_upper_threshold <=
data.prefetch_buffer_lower_threshold) {
return false;
}
return true;
}
// Ensures that the file_ref members of the given request info data are
// populated from the resource IDs. Returns true on success.
bool EnsureFileRefObjectsPopulated(::ppapi::URLRequestInfoData* data) {
// Get the Resource objects for any file refs with only host resource (this
// is the state of the request as it comes off IPC).
for (size_t i = 0; i < data->body.size(); ++i) {
URLRequestInfoData::BodyItem& item = data->body[i];
if (item.is_file && !item.file_ref.get()) {
EnterResourceNoLock<PPB_FileRef_API> enter(
item.file_ref_host_resource.host_resource(), false);
if (!enter.succeeded())
return false;
item.file_ref = enter.resource();
}
}
return true;
}
} // namespace
bool CreateWebURLRequest(::ppapi::URLRequestInfoData* data,
WebFrame* frame,
WebURLRequest* dest) {
// In the out-of-process case, we've received the URLRequestInfoData
// from the untrusted plugin and done no validation on it. We need to be
// sure it's not being malicious by checking everything for consistency.
if (!ValidateURLRequestData(*data) || !EnsureFileRefObjectsPopulated(data))
return false;
dest->initialize();
dest->setTargetType(WebURLRequest::TargetIsObject);
dest->setURL(frame->document().completeURL(WebString::fromUTF8(
data->url)));
dest->setDownloadToFile(data->stream_to_file);
dest->setReportUploadProgress(data->record_upload_progress);
if (!data->method.empty())
dest->setHTTPMethod(WebString::fromUTF8(data->method));
dest->setFirstPartyForCookies(frame->document().firstPartyForCookies());
const std::string& headers = data->headers;
if (!headers.empty()) {
net::HttpUtil::HeadersIterator it(headers.begin(), headers.end(), "\n\r");
while (it.GetNext()) {
dest->addHTTPHeaderField(
WebString::fromUTF8(it.name()),
WebString::fromUTF8(it.values()));
}
}
// Append the upload data.
if (!data->body.empty()) {
WebHTTPBody http_body;
http_body.initialize();
for (size_t i = 0; i < data->body.size(); ++i) {
const URLRequestInfoData::BodyItem& item = data->body[i];
if (item.is_file) {
if (!AppendFileRefToBody(item.file_ref.get(),
item.start_offset,
item.number_of_bytes,
item.expected_last_modified_time,
&http_body))
return false;
} else {
DCHECK(!item.data.empty());
http_body.appendData(WebData(item.data));
}
}
dest->setHTTPBody(http_body);
}
// Add the "Referer" header if there is a custom referrer. Such requests
// require universal access. For all other requests, "Referer" will be set
// after header security checks are done in AssociatedURLLoader.
if (data->has_custom_referrer_url && !data->custom_referrer_url.empty())
frame->setReferrerForRequest(*dest, GURL(data->custom_referrer_url));
if (data->has_custom_content_transfer_encoding &&
!data->custom_content_transfer_encoding.empty()) {
dest->addHTTPHeaderField(
WebString::fromUTF8("Content-Transfer-Encoding"),
WebString::fromUTF8(data->custom_content_transfer_encoding));
}
if (data->has_custom_user_agent) {
dest->setExtraData(new webkit_glue::WebURLRequestExtraDataImpl(
WebKit::WebReferrerPolicyDefault, // Ignored.
WebString::fromUTF8(data->custom_user_agent)));
}
return true;
}
bool URLRequestRequiresUniversalAccess(
const ::ppapi::URLRequestInfoData& data) {
return
data.has_custom_referrer_url ||
data.has_custom_content_transfer_encoding ||
data.has_custom_user_agent ||
url_util::FindAndCompareScheme(data.url, "javascript", NULL);
}
} // namespace ppapi
} // namespace webkit
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