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HTTPClient.cpp
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522 lines (383 loc) · 14.1 KB
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <SFNUL/HTTPClient.hpp>
#include <SFNUL/IpAddress.hpp>
#include <SFNUL/Endpoint.hpp>
#include <SFNUL/TlsConnection.hpp>
#include <SFNUL/MakeUnique.hpp>
#include <http_parser.h>
#include <algorithm>
#include <deque>
namespace sfn {
int OnMessageBegin( http_parser* parser );
int OnUrl( http_parser* parser, const char* data, std::size_t length );
int OnStatus( http_parser* parser, const char* data, std::size_t length );
int OnHeaderField( http_parser* parser, const char* data, std::size_t length );
int OnHeaderValue( http_parser* parser, const char* data, std::size_t length );
int OnHeadersComplete( http_parser* parser );
int OnBody( http_parser* parser, const char* data, std::size_t length );
int OnMessageComplete( http_parser* parser );
class HTTPClientPipeline {
public:
HTTPClientPipeline( Endpoint endpoint, bool secure, const std::chrono::seconds& timeout ) :
m_secure{ secure },
m_remote_endpoint{ endpoint },
m_timeout_value{ timeout }
{
if( !secure ) {
m_socket = TcpSocket::Create();
m_socket->Connect( endpoint );
}
else {
m_socket = TlsConnection<TcpSocket, TlsEndpointType::Client, TlsVerificationType::Required>::Create();
}
http_parser_init( &m_parser, HTTP_RESPONSE );
m_parser_settings.on_message_begin = OnMessageBegin;
m_parser_settings.on_url = OnUrl;
m_parser_settings.on_status = OnStatus;
m_parser_settings.on_header_field = OnHeaderField;
m_parser_settings.on_header_value = OnHeaderValue;
m_parser_settings.on_headers_complete = OnHeadersComplete;
m_parser_settings.on_body = OnBody;
m_parser_settings.on_message_complete = OnMessageComplete;
}
#if !defined( SFNUL_BROKEN_CXX11 )
HTTPClientPipeline( HTTPClientPipeline&& ) = default;
#endif
~HTTPClientPipeline() {
if( !m_socket ) {
return;
}
auto shutdown_start = std::chrono::steady_clock::now();
m_socket->Shutdown();
while( !m_socket->LocalHasShutdown() && ( ( std::chrono::steady_clock::now() - shutdown_start ) < std::chrono::seconds{ 1 } ) ) {
}
if( ( std::chrono::steady_clock::now() - shutdown_start ) >= std::chrono::seconds{ 1 } ) {
InformationMessage() << "HTTP Connection shutdown timed out.\n";
}
m_socket->ClearBuffers();
m_socket->Reset();
m_socket->Close();
}
void LoadCertificate( TlsCertificate::Ptr certificate, const std::string& common_name ) {
if( !m_secure ) {
return;
}
m_certificate = certificate;
if( m_socket ) {
auto socket = std::static_pointer_cast<TlsConnection<TcpSocket, TlsEndpointType::Client, TlsVerificationType::Required>>( m_socket );
if( !common_name.empty() ) {
socket->SetPeerCommonName( common_name );
}
socket->AddTrustedCertificate( std::move( certificate ) );
socket->Connect( m_remote_endpoint );
}
}
void SendRequest( HTTPRequest request ) {
if( m_pipeline.empty() ) {
m_current_request = request;
}
auto request_string = request.ToString();
m_socket->Send( request_string.c_str(), request_string.length() );
m_last_activity = std::chrono::steady_clock::now();
m_pipeline.emplace_back( std::move( request ), HTTPResponse{} );
}
HTTPResponse GetResponse( const HTTPRequest& request ) {
auto iter( std::begin( m_pipeline ) );
for( ; iter != std::end( m_pipeline ); ++iter ) {
if( iter->first == request ) {
break;
}
}
if( iter == std::end( m_pipeline ) ) {
return HTTPResponse{};
}
if( !iter->second.IsComplete() ) {
return iter->second;
}
auto result = std::move( iter->second );
m_pipeline.erase( iter );
return result;
}
void Update() {
if( TimedOut() ) {
if( HasRequests() ) {
m_last_activity = std::chrono::steady_clock::now();
Reconnect();
}
return;
}
std::vector<char> data( m_socket->BytesToReceive() );
std::size_t received = 0;
while( ( received = m_socket->Receive( data.data(), data.size() ) ) ) {
if( received ) {
m_last_activity = std::chrono::steady_clock::now();
}
else {
return;
}
m_parser.data = this;
auto parsed = http_parser_execute( &m_parser, &m_parser_settings, data.data(), received );
if( parsed != received ) {
ErrorMessage() << "HTTP Parser parsed " << parsed << " of " << received << " bytes.\n";
ErrorMessage() << "HTTP Parser error: " << http_errno_description( HTTP_PARSER_ERRNO( &m_parser ) ) << ".\n";
return;
}
auto new_buffer_size = m_socket->BytesToReceive();
if( new_buffer_size > data.size() ) {
data.resize( new_buffer_size );
}
}
if( m_socket->RemoteHasShutdown() && !m_socket->LocalHasShutdown() ) {
http_parser_execute( &m_parser, &m_parser_settings, nullptr, 0 );
Reconnect();
}
}
bool TimedOut() const {
return ( m_timeout_value != std::chrono::seconds{ 0 } ) && ( ( std::chrono::steady_clock::now() - m_last_activity ) > m_timeout_value );
}
bool HasRequests() const {
return !m_pipeline.empty();
}
private:
friend int OnMessageBegin( http_parser* parser );
friend int OnUrl( http_parser* parser, const char* data, std::size_t length );
friend int OnStatus( http_parser* parser, const char* data, std::size_t length );
friend int OnHeaderField( http_parser* parser, const char* data, std::size_t length );
friend int OnHeaderValue( http_parser* parser, const char* data, std::size_t length );
friend int OnHeadersComplete( http_parser* parser );
friend int OnBody( http_parser* parser, const char* data, std::size_t length );
friend int OnMessageComplete( http_parser* parser );
typedef std::pair<HTTPRequest, HTTPResponse> PipelineElement;
typedef std::deque<PipelineElement> Pipeline;
void Reconnect() {
m_socket->Shutdown();
auto send_start = std::chrono::steady_clock::now();
while( !m_socket->LocalHasShutdown() && ( ( std::chrono::steady_clock::now() - send_start ) < std::chrono::seconds{ 1 } ) ) {
}
m_socket->ClearBuffers();
m_socket->Reset();
m_socket->Close();
if( !m_secure ) {
m_socket = TcpSocket::Create();
}
else {
m_socket = TlsConnection<TcpSocket, TlsEndpointType::Client, TlsVerificationType::Required>::Create();
auto socket = std::static_pointer_cast<TlsConnection<TcpSocket, TlsEndpointType::Client, TlsVerificationType::Required>>( m_socket );
socket->AddTrustedCertificate( m_certificate );
}
m_socket->Connect( m_remote_endpoint );
std::memset( &m_parser, 0, sizeof( http_parser ) );
http_parser_init( &m_parser, HTTP_RESPONSE );
bool current_set = false;
for( auto& e : m_pipeline ) {
if( !e.second.IsComplete() ) {
if( !current_set ) {
current_set = true;
m_current_request = e.first;
}
auto request_string( e.first.ToString() );
m_socket->Send( request_string.c_str(), request_string.length() );
}
}
}
TcpSocket::Ptr m_socket;
bool m_secure;
Endpoint m_remote_endpoint;
TlsCertificate::Ptr m_certificate;
#if defined( __GNUG__ )
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
http_parser_settings m_parser_settings;
http_parser m_parser;
#if defined( __GNUG__ )
#pragma GCC diagnostic pop
#endif
Pipeline m_pipeline;
HTTPRequest m_current_request;
std::string m_last_header_field;
bool m_header_field_complete{ false };
std::chrono::steady_clock::time_point m_last_activity{ std::chrono::steady_clock::now() };
std::chrono::seconds m_timeout_value;
};
int OnMessageBegin( http_parser* /*parser*/ ) {
//HTTPClientPipeline& pipeline( *static_cast<HTTPClientPipeline*>( parser->data ) );
return 0;
}
int OnUrl( http_parser* /*parser*/, const char* /*data*/, std::size_t /*length*/ ) {
//HTTPClientPipeline& pipeline( *static_cast<HTTPClientPipeline*>( parser->data ) );
return 0;
}
int OnStatus( http_parser* parser, const char* data, std::size_t length ) {
HTTPClientPipeline& pipeline( *static_cast<HTTPClientPipeline*>( parser->data ) );
auto iter( std::begin( pipeline.m_pipeline ) );
for( ; iter != std::end( pipeline.m_pipeline ); ++iter ) {
if( iter->first == pipeline.m_current_request ) {
break;
}
}
if( iter == std::end( pipeline.m_pipeline ) ) {
ErrorMessage() << "HTTP Parser could not find pipeline element to update.\n";
return 1;
}
HTTPResponse& response( iter->second );
response.SetStatus( response.GetStatus() + std::string( data, length ) );
return 0;
}
int OnHeaderField( http_parser* parser, const char* data, std::size_t length ) {
sfn::HTTPClientPipeline& pipeline( *static_cast<sfn::HTTPClientPipeline*>( parser->data ) );
// If this is a new header, clear the saved field name and set complete to false.
if( pipeline.m_header_field_complete ) {
pipeline.m_last_header_field.clear();
pipeline.m_header_field_complete = false;
}
pipeline.m_last_header_field.append( data, length );
return 0;
}
int OnHeaderValue( http_parser* parser, const char* data, std::size_t length ) {
HTTPClientPipeline& pipeline( *static_cast<HTTPClientPipeline*>( parser->data ) );
pipeline.m_header_field_complete = true;
auto iter( std::begin( pipeline.m_pipeline ) );
for( ; iter != std::end( pipeline.m_pipeline ); ++iter ) {
if( iter->first == pipeline.m_current_request ) {
break;
}
}
if( iter == std::end( pipeline.m_pipeline ) ) {
ErrorMessage() << "HTTP Parser could not find pipeline element to update.\n";
return 1;
}
HTTPResponse& response( iter->second );
response.SetHeaderValue( pipeline.m_last_header_field, response.GetHeaderValue( pipeline.m_last_header_field ) + std::string( data, length ) );
return 0;
}
int OnHeadersComplete( http_parser* parser ) {
HTTPClientPipeline& pipeline( *static_cast<HTTPClientPipeline*>( parser->data ) );
auto iter( std::begin( pipeline.m_pipeline ) );
for( ; iter != std::end( pipeline.m_pipeline ); ++iter ) {
if( iter->first == pipeline.m_current_request ) {
break;
}
}
if( iter == std::end( pipeline.m_pipeline ) ) {
ErrorMessage() << "HTTP Parser could not find pipeline element to update.\n";
return 1;
}
HTTPResponse& response( iter->second );
response.SetHeaderComplete();
auto content_length = response.GetHeaderValue( "Content-Length" );
if( !content_length.empty() ) {
response.ReserveBody( static_cast<std::size_t>( std::stoi( content_length ) ) );
}
return 0;
}
int OnBody( http_parser* parser, const char* data, std::size_t length ) {
HTTPClientPipeline& pipeline( *static_cast<HTTPClientPipeline*>( parser->data ) );
auto iter( std::begin( pipeline.m_pipeline ) );
for( ; iter != std::end( pipeline.m_pipeline ); ++iter ) {
if( iter->first == pipeline.m_current_request ) {
break;
}
}
if( iter == std::end( pipeline.m_pipeline ) ) {
ErrorMessage() << "HTTP Parser could not find pipeline element to update.\n";
return 1;
}
HTTPResponse& response( iter->second );
auto body = response.GetBody();
body.insert( std::end( body ), data, data + length );
response.SetBody( std::move( body ) );
return 0;
}
int OnMessageComplete( http_parser* parser ) {
HTTPClientPipeline& pipeline( *static_cast<HTTPClientPipeline*>( parser->data ) );
auto iter( std::begin( pipeline.m_pipeline ) );
for( ; iter != std::end( pipeline.m_pipeline ); ++iter ) {
if( iter->first == pipeline.m_current_request ) {
break;
}
}
if( iter == std::end( pipeline.m_pipeline ) ) {
ErrorMessage() << "HTTP Parser could not find pipeline element to update.\n";
return 1;
}
iter->second.SetBodyComplete();
if( iter->second.GetHeaderValue( "Connection" ) == "close" ) {
pipeline.Reconnect();
}
++iter;
if( iter == std::end( pipeline.m_pipeline ) ) {
pipeline.m_current_request = HTTPRequest{};
return 0;
}
pipeline.m_current_request = iter->first;
return 0;
}
HTTPClient::HTTPClient() = default;
HTTPClient::~HTTPClient() = default;
void HTTPClient::SendRequest( HTTPRequest request, const std::string& address, unsigned short port, bool secure ) {
auto addresses = sfn::IpAddress::Resolve( address );
if( addresses.empty() ) {
WarningMessage() << "HTTP name resolution failed for " << address << "\n";
return;
}
Endpoint endpoint{ addresses.front(), port };
auto iter = std::find_if( std::begin( m_pipelines ), std::end( m_pipelines ),
[address, port]( const Pipeline& pipeline ) {
return ( ( std::get<1>( pipeline ) == address ) && ( std::get<2>( pipeline ) == port ) );
}
);
if( iter == std::end( m_pipelines ) ) {
m_pipelines.emplace_back( make_unique<HTTPClientPipeline>( std::move( endpoint ), secure, m_timeout_value ), address, port );
iter = std::end( m_pipelines );
--iter;
auto certificate_iter = m_certificates.find( address );
if( certificate_iter != std::end( m_certificates ) ) {
std::get<0>( *iter )->LoadCertificate( certificate_iter->second.first, certificate_iter->second.second );
}
}
auto str = request.ToString();
std::get<0>( *iter )->SendRequest( request );
}
HTTPResponse HTTPClient::GetResponse( const HTTPRequest& request, const std::string& address, unsigned short port ) {
auto pipeline_iter = std::find_if( std::begin( m_pipelines ), std::end( m_pipelines ),
[&]( Pipeline& p ) {
return ( ( address == std::get<1>( p ) ) && ( port == std::get<2>( p ) ) );
}
);
if( pipeline_iter == std::end( m_pipelines ) ) {
return HTTPResponse{};
}
return std::get<0>( *pipeline_iter )->GetResponse( request );
}
void HTTPClient::LoadCertificate( const std::string& address, TlsCertificate::Ptr certificate, std::string common_name ) {
m_certificates[address] = std::make_pair( certificate, common_name );
auto pipeline_iter = std::find_if( std::begin( m_pipelines ), std::end( m_pipelines ),
[&]( Pipeline& p ) {
return ( address == std::get<1>( p ) );
}
);
if( pipeline_iter == std::end( m_pipelines ) ) {
return;
}
std::get<0>( *pipeline_iter )->LoadCertificate( std::move( certificate ), common_name );
}
void HTTPClient::SetTimeoutValue( const std::chrono::seconds& timeout ) {
m_timeout_value = timeout;
}
void HTTPClient::Update() {
for( auto iter = std::begin( m_pipelines ); iter != std::end( m_pipelines ); ) {
std::get<0>( *iter )->Update();
if( std::get<0>( *iter )->TimedOut() ) {
if( !std::get<0>( *iter )->HasRequests() ) {
iter = m_pipelines.erase( iter );
}
}
else {
++iter;
}
}
}
}