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// Copyright (c) 2010 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 "net/url_request/url_request_ftp_job.h"
#include "base/compiler_specific.h"
#include "base/message_loop.h"
#include "base/utf_string_conversions.h"
#include "net/base/auth.h"
#include "net/base/net_errors.h"
#include "net/base/net_util.h"
#include "net/ftp/ftp_response_info.h"
#include "net/ftp/ftp_transaction_factory.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_error_job.h"
URLRequestFtpJob::URLRequestFtpJob(URLRequest* request)
: URLRequestJob(request),
ALLOW_THIS_IN_INITIALIZER_LIST(
start_callback_(this, &URLRequestFtpJob::OnStartCompleted)),
ALLOW_THIS_IN_INITIALIZER_LIST(
read_callback_(this, &URLRequestFtpJob::OnReadCompleted)),
read_in_progress_(false),
context_(request->context()) {
}
URLRequestFtpJob::~URLRequestFtpJob() {
}
// static
URLRequestJob* URLRequestFtpJob::Factory(URLRequest* request,
const std::string& scheme) {
DCHECK_EQ(scheme, "ftp");
int port = request->url().IntPort();
if (request->url().has_port() &&
!net::IsPortAllowedByFtp(port) && !net::IsPortAllowedByOverride(port))
return new URLRequestErrorJob(request, net::ERR_UNSAFE_PORT);
DCHECK(request->context());
DCHECK(request->context()->ftp_transaction_factory());
return new URLRequestFtpJob(request);
}
bool URLRequestFtpJob::GetMimeType(std::string* mime_type) const {
if (transaction_->GetResponseInfo()->is_directory_listing) {
*mime_type = "text/vnd.chromium.ftp-dir";
return true;
}
return false;
}
void URLRequestFtpJob::Start() {
DCHECK(!transaction_.get());
request_info_.url = request_->url();
StartTransaction();
}
void URLRequestFtpJob::Kill() {
if (!transaction_.get())
return;
DestroyTransaction();
URLRequestJob::Kill();
}
net::LoadState URLRequestFtpJob::GetLoadState() const {
return transaction_.get() ?
transaction_->GetLoadState() : net::LOAD_STATE_IDLE;
}
bool URLRequestFtpJob::NeedsAuth() {
// Note that we only have to worry about cases where an actual FTP server
// requires auth (and not a proxy), because connecting to FTP via proxy
// effectively means the browser communicates via HTTP, and uses HTTP's
// Proxy-Authenticate protocol when proxy servers require auth.
return server_auth_ && server_auth_->state == net::AUTH_STATE_NEED_AUTH;
}
void URLRequestFtpJob::GetAuthChallengeInfo(
scoped_refptr<net::AuthChallengeInfo>* result) {
DCHECK((server_auth_ != NULL) &&
(server_auth_->state == net::AUTH_STATE_NEED_AUTH));
scoped_refptr<net::AuthChallengeInfo> auth_info(new net::AuthChallengeInfo);
auth_info->is_proxy = false;
auth_info->host_and_port = ASCIIToWide(
net::GetHostAndPort(request_->url()));
auth_info->scheme = L"";
auth_info->realm = L"";
result->swap(auth_info);
}
void URLRequestFtpJob::SetAuth(const string16& username,
const string16& password) {
DCHECK(NeedsAuth());
server_auth_->state = net::AUTH_STATE_HAVE_AUTH;
server_auth_->username = username;
server_auth_->password = password;
request_->context()->ftp_auth_cache()->Add(request_->url().GetOrigin(),
username, password);
RestartTransactionWithAuth();
}
void URLRequestFtpJob::CancelAuth() {
DCHECK(NeedsAuth());
server_auth_->state = net::AUTH_STATE_CANCELED;
// Once the auth is cancelled, we proceed with the request as though
// there were no auth. Schedule this for later so that we don't cause
// any recursing into the caller as a result of this call.
MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
this, &URLRequestFtpJob::OnStartCompleted, net::OK));
}
bool URLRequestFtpJob::ReadRawData(net::IOBuffer* buf,
int buf_size,
int *bytes_read) {
DCHECK_NE(buf_size, 0);
DCHECK(bytes_read);
DCHECK(!read_in_progress_);
int rv = transaction_->Read(buf, buf_size, &read_callback_);
if (rv >= 0) {
*bytes_read = rv;
return true;
}
if (rv == net::ERR_IO_PENDING) {
read_in_progress_ = true;
SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
} else {
NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, rv));
}
return false;
}
void URLRequestFtpJob::OnStartCompleted(int result) {
// If the request was destroyed, then there is no more work to do.
if (!request_ || !request_->delegate())
return;
// If the transaction was destroyed, then the job was cancelled, and
// we can just ignore this notification.
if (!transaction_.get())
return;
// Clear the IO_PENDING status
SetStatus(URLRequestStatus());
// FTP obviously doesn't have HTTP Content-Length header. We have to pass
// the content size information manually.
set_expected_content_size(
transaction_->GetResponseInfo()->expected_content_size);
if (result == net::OK) {
NotifyHeadersComplete();
} else if (transaction_->GetResponseInfo()->needs_auth) {
GURL origin = request_->url().GetOrigin();
if (server_auth_ && server_auth_->state == net::AUTH_STATE_HAVE_AUTH) {
request_->context()->ftp_auth_cache()->Remove(origin,
server_auth_->username,
server_auth_->password);
} else if (!server_auth_) {
server_auth_ = new net::AuthData();
}
server_auth_->state = net::AUTH_STATE_NEED_AUTH;
net::FtpAuthCache::Entry* cached_auth =
request_->context()->ftp_auth_cache()->Lookup(origin);
if (cached_auth) {
// Retry using cached auth data.
SetAuth(cached_auth->username, cached_auth->password);
} else {
// Prompt for a username/password.
NotifyHeadersComplete();
}
} else {
NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, result));
}
}
void URLRequestFtpJob::OnReadCompleted(int result) {
read_in_progress_ = false;
if (result == 0) {
NotifyDone(URLRequestStatus());
} else if (result < 0) {
NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, result));
} else {
// Clear the IO_PENDING status
SetStatus(URLRequestStatus());
}
NotifyReadComplete(result);
}
void URLRequestFtpJob::RestartTransactionWithAuth() {
DCHECK(server_auth_ && server_auth_->state == net::AUTH_STATE_HAVE_AUTH);
// No matter what, we want to report our status as IO pending since we will
// be notifying our consumer asynchronously via OnStartCompleted.
SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
int rv = transaction_->RestartWithAuth(server_auth_->username,
server_auth_->password,
&start_callback_);
if (rv == net::ERR_IO_PENDING)
return;
MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
this, &URLRequestFtpJob::OnStartCompleted, rv));
}
void URLRequestFtpJob::StartTransaction() {
// Create a transaction.
DCHECK(!transaction_.get());
DCHECK(request_->context());
DCHECK(request_->context()->ftp_transaction_factory());
transaction_.reset(
request_->context()->ftp_transaction_factory()->CreateTransaction());
// No matter what, we want to report our status as IO pending since we will
// be notifying our consumer asynchronously via OnStartCompleted.
SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
int rv;
if (transaction_.get()) {
rv = transaction_->Start(
&request_info_, &start_callback_, request_->net_log());
if (rv == net::ERR_IO_PENDING)
return;
} else {
rv = net::ERR_FAILED;
}
// The transaction started synchronously, but we need to notify the
// URLRequest delegate via the message loop.
MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
this, &URLRequestFtpJob::OnStartCompleted, rv));
}
void URLRequestFtpJob::DestroyTransaction() {
DCHECK(transaction_.get());
transaction_.reset();
}
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