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// Copyright (c) 2006-2008 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.
//
// This job type handles Chrome plugin network interception. When a plugin
// wants to intercept a request, a job of this type is created. The intercept
// job communicates with the plugin to retrieve the response headers and data.
#include "chrome/common/net/url_request_intercept_job.h"
#include "base/message_loop.h"
#include "base/string_util.h"
#include "chrome/common/chrome_plugin_lib.h"
#include "chrome/common/notification_service.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/http/http_response_headers.h"
#include "net/url_request/url_request.h"
using base::Time;
using base::TimeDelta;
//
// URLRequestInterceptJob
//
URLRequestInterceptJob::URLRequestInterceptJob(URLRequest* request,
ChromePluginLib* plugin,
ScopableCPRequest* cprequest)
: URLRequestJob(request),
cprequest_(cprequest),
plugin_(plugin),
read_buffer_(NULL) {
cprequest_->data = this; // see FromCPRequest().
registrar_.Add(this, NotificationType::CHROME_PLUGIN_UNLOADED,
Source<ChromePluginLib>(plugin_));
}
URLRequestInterceptJob::~URLRequestInterceptJob() {
if (plugin_) {
plugin_->functions().request_funcs->end_request(cprequest_.get(),
CPERR_SUCCESS);
}
}
void URLRequestInterceptJob::DetachPlugin() {
registrar_.RemoveAll();
plugin_ = NULL;
}
void URLRequestInterceptJob::Start() {
// Start reading asynchronously so that all error reporting and data
// callbacks happen as they would for network requests.
MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
this, &URLRequestInterceptJob::StartAsync));
}
void URLRequestInterceptJob::Kill() {
if (plugin_) {
plugin_->functions().request_funcs->end_request(cprequest_.get(),
CPERR_CANCELLED);
DetachPlugin();
}
URLRequestJob::Kill();
}
bool URLRequestInterceptJob::ReadRawData(net::IOBuffer* dest, int dest_size,
int* bytes_read) {
DCHECK_NE(dest_size, 0);
DCHECK(bytes_read);
if (!plugin_)
return false;
int rv = plugin_->functions().request_funcs->read(cprequest_.get(),
dest->data(), dest_size);
if (rv >= 0) {
*bytes_read = rv;
return true;
}
if (rv == CPERR_IO_PENDING) {
read_buffer_ = dest;
read_buffer_size_ = dest_size;
SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
} else {
// TODO(mpcomplete): better error code
NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, net::ERR_FAILED));
}
return false;
}
bool URLRequestInterceptJob::GetMimeType(std::string* mime_type) const {
return request_->response_headers()->GetMimeType(mime_type);
}
bool URLRequestInterceptJob::GetCharset(std::string* charset) {
return request_->response_headers()->GetCharset(charset);
}
bool URLRequestInterceptJob::GetContentEncodings(
std::vector<Filter::FilterType>* encoding_types) {
DCHECK(encoding_types->empty());
if (!request_->response_headers())
return false;
std::string encoding_type;
void* iter = NULL;
while (request_->response_headers()->EnumerateHeader(
&iter, "Content-Encoding", &encoding_type)) {
encoding_types->push_back(Filter::ConvertEncodingToType(encoding_type));
}
// Even if encoding types are empty, there is a chance that we need to add
// some decoding, as some proxies strip encoding completely. In such cases,
// we may need to add (for example) SDCH filtering (when the context suggests
// it is appropriate).
Filter::FixupEncodingTypes(*this, encoding_types);
return !encoding_types->empty();
}
void URLRequestInterceptJob::GetResponseInfo(net::HttpResponseInfo* info) {
if (!plugin_)
return;
std::string raw_headers;
int size = plugin_->functions().request_funcs->get_response_info(
cprequest_.get(), CPRESPONSEINFO_HTTP_RAW_HEADERS, NULL, 0);
int rv = size < 0 ? size :
plugin_->functions().request_funcs->get_response_info(
cprequest_.get(), CPRESPONSEINFO_HTTP_RAW_HEADERS,
WriteInto(&raw_headers, size+1), size);
if (rv != CPERR_SUCCESS) {
// TODO(mpcomplete): what should we do here?
raw_headers = "HTTP/1.1 404 Not Found" + '\0';
}
info->headers = new net::HttpResponseHeaders(raw_headers);
if (request_->url().SchemeIsSecure()) {
// Make up a fake certificate for intercepted data since we don't have
// access to the real SSL info.
// TODO(mpcomplete): we should probably have the interception API transmit
// the SSL info, but the only consumer of this API (Gears) doesn't keep that
// around. We should change that.
const char* kCertIssuer = "Chrome Internal";
const int kLifetimeDays = 100;
DLOG(WARNING) << "Issuing a fake SSL certificate for interception of URL "
<< request_->url();
info->ssl_info.cert =
new net::X509Certificate(request_->url().GetWithEmptyPath().spec(),
kCertIssuer,
Time::Now(),
Time::Now() +
TimeDelta::FromDays(kLifetimeDays));
info->ssl_info.cert_status = 0;
info->ssl_info.security_bits = 0;
}
}
int URLRequestInterceptJob::GetResponseCode() const {
if (!plugin_)
return -1;
int status = 200;
plugin_->functions().request_funcs->get_response_info(
cprequest_.get(), CPRESPONSEINFO_HTTP_STATUS, &status, sizeof(status));
return status;
}
bool URLRequestInterceptJob::IsRedirectResponse(GURL* location,
int* http_status_code) {
if (!request_->response_headers())
return false;
std::string value;
if (!request_->response_headers()->IsRedirect(&value))
return false;
*location = request_->url().Resolve(value);
*http_status_code = request_->response_headers()->response_code();
return true;
}
void URLRequestInterceptJob::StartAsync() {
// We may have been orphaned...
if (!request_ || !plugin_)
return;
int rv = plugin_->functions().request_funcs->start_request(cprequest_.get());
if (rv != CPERR_IO_PENDING)
OnStartCompleted(rv);
}
void URLRequestInterceptJob::OnStartCompleted(int result) {
if (result != CPERR_SUCCESS) {
NotifyDone(URLRequestStatus(URLRequestStatus::FAILED,
net::ERR_CONNECTION_FAILED));
return;
}
NotifyHeadersComplete();
}
void URLRequestInterceptJob::OnReadCompleted(int bytes_read) {
if (bytes_read < 0) {
NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, net::ERR_FAILED));
return;
}
SetStatus(URLRequestStatus()); // clear the async flag
NotifyReadComplete(bytes_read);
}
void URLRequestInterceptJob::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK(type == NotificationType::CHROME_PLUGIN_UNLOADED);
DCHECK(plugin_ == Source<ChromePluginLib>(source).ptr());
DetachPlugin();
}
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