691 lines
28 KiB
C++
691 lines
28 KiB
C++
#ifndef CLIENT_HTTP_HPP
|
|
#define CLIENT_HTTP_HPP
|
|
|
|
#include "utility.hpp"
|
|
#include <limits>
|
|
#include <mutex>
|
|
#include <random>
|
|
#include <unordered_set>
|
|
#include <vector>
|
|
|
|
#ifdef USE_STANDALONE_ASIO
|
|
#include <asio.hpp>
|
|
#include <asio/steady_timer.hpp>
|
|
namespace SimpleWeb {
|
|
using error_code = std::error_code;
|
|
using errc = std::errc;
|
|
using system_error = std::system_error;
|
|
namespace make_error_code = std;
|
|
} // namespace SimpleWeb
|
|
#else
|
|
#include <boost/asio.hpp>
|
|
#include <boost/asio/steady_timer.hpp>
|
|
namespace SimpleWeb {
|
|
namespace asio = boost::asio;
|
|
using error_code = boost::system::error_code;
|
|
namespace errc = boost::system::errc;
|
|
using system_error = boost::system::system_error;
|
|
namespace make_error_code = boost::system::errc;
|
|
} // namespace SimpleWeb
|
|
#endif
|
|
|
|
namespace SimpleWeb {
|
|
template <class socket_type>
|
|
class Client;
|
|
|
|
template <class socket_type>
|
|
class ClientBase {
|
|
public:
|
|
class Content : public std::istream {
|
|
friend class ClientBase<socket_type>;
|
|
|
|
public:
|
|
std::size_t size() noexcept {
|
|
return streambuf.size();
|
|
}
|
|
/// Convenience function to return std::string. The stream buffer is consumed.
|
|
std::string string() noexcept {
|
|
try {
|
|
std::string str;
|
|
auto size = streambuf.size();
|
|
str.resize(size);
|
|
read(&str[0], static_cast<std::streamsize>(size));
|
|
return str;
|
|
}
|
|
catch(...) {
|
|
return std::string();
|
|
}
|
|
}
|
|
|
|
private:
|
|
asio::streambuf &streambuf;
|
|
Content(asio::streambuf &streambuf) noexcept : std::istream(&streambuf), streambuf(streambuf) {}
|
|
};
|
|
|
|
class Response {
|
|
friend class ClientBase<socket_type>;
|
|
friend class Client<socket_type>;
|
|
|
|
asio::streambuf streambuf;
|
|
|
|
Response(std::size_t max_response_streambuf_size) noexcept : streambuf(max_response_streambuf_size), content(streambuf) {}
|
|
|
|
public:
|
|
std::string http_version, status_code;
|
|
|
|
Content content;
|
|
|
|
CaseInsensitiveMultimap header;
|
|
};
|
|
|
|
class Config {
|
|
friend class ClientBase<socket_type>;
|
|
|
|
private:
|
|
Config() noexcept {}
|
|
|
|
public:
|
|
/// Set timeout on requests in seconds. Default value: 0 (no timeout).
|
|
long timeout = 0;
|
|
/// Set connect timeout in seconds. Default value: 0 (Config::timeout is then used instead).
|
|
long timeout_connect = 0;
|
|
/// Maximum size of response stream buffer. Defaults to architecture maximum.
|
|
/// Reaching this limit will result in a message_size error code.
|
|
std::size_t max_response_streambuf_size = std::numeric_limits<std::size_t>::max();
|
|
/// Set proxy server (server:port)
|
|
std::string proxy_server;
|
|
};
|
|
|
|
protected:
|
|
class Connection : public std::enable_shared_from_this<Connection> {
|
|
public:
|
|
template <typename... Args>
|
|
Connection(std::shared_ptr<ScopeRunner> handler_runner_, long timeout, Args &&... args) noexcept
|
|
: handler_runner(std::move(handler_runner_)), timeout(timeout), socket(new socket_type(std::forward<Args>(args)...)) {}
|
|
|
|
std::shared_ptr<ScopeRunner> handler_runner;
|
|
long timeout;
|
|
|
|
std::unique_ptr<socket_type> socket; // Socket must be unique_ptr since asio::ssl::stream<asio::ip::tcp::socket> is not movable
|
|
bool in_use = false;
|
|
bool attempt_reconnect = true;
|
|
|
|
std::unique_ptr<asio::steady_timer> timer;
|
|
|
|
void set_timeout(long seconds = 0) noexcept {
|
|
if(seconds == 0)
|
|
seconds = timeout;
|
|
if(seconds == 0) {
|
|
timer = nullptr;
|
|
return;
|
|
}
|
|
timer = std::unique_ptr<asio::steady_timer>(new asio::steady_timer(socket->get_io_service()));
|
|
timer->expires_from_now(std::chrono::seconds(seconds));
|
|
auto self = this->shared_from_this();
|
|
timer->async_wait([self](const error_code &ec) {
|
|
if(!ec) {
|
|
error_code ec;
|
|
self->socket->lowest_layer().cancel(ec);
|
|
}
|
|
});
|
|
}
|
|
|
|
void cancel_timeout() noexcept {
|
|
if(timer) {
|
|
error_code ec;
|
|
timer->cancel(ec);
|
|
}
|
|
}
|
|
};
|
|
|
|
class Session {
|
|
public:
|
|
Session(std::size_t max_response_streambuf_size, std::shared_ptr<Connection> connection_, std::unique_ptr<asio::streambuf> request_streambuf_) noexcept
|
|
: connection(std::move(connection_)), request_streambuf(std::move(request_streambuf_)), response(new Response(max_response_streambuf_size)) {}
|
|
|
|
std::shared_ptr<Connection> connection;
|
|
std::unique_ptr<asio::streambuf> request_streambuf;
|
|
std::shared_ptr<Response> response;
|
|
std::function<void(const std::shared_ptr<Connection> &, const error_code &)> callback;
|
|
};
|
|
|
|
public:
|
|
/// Set before calling request
|
|
Config config;
|
|
|
|
/// If you have your own asio::io_service, store its pointer here before calling request().
|
|
/// When using asynchronous requests, running the io_service is up to the programmer.
|
|
std::shared_ptr<asio::io_service> io_service;
|
|
|
|
/// Convenience function to perform synchronous request. The io_service is run within this function.
|
|
/// If reusing the io_service for other tasks, use the asynchronous request functions instead.
|
|
/// Do not use concurrently with the asynchronous request functions.
|
|
std::shared_ptr<Response> request(const std::string &method, const std::string &path = std::string("/"),
|
|
string_view content = "", const CaseInsensitiveMultimap &header = CaseInsensitiveMultimap()) {
|
|
std::shared_ptr<Response> response;
|
|
error_code ec;
|
|
request(method, path, content, header, [&response, &ec](std::shared_ptr<Response> response_, const error_code &ec_) {
|
|
response = response_;
|
|
ec = ec_;
|
|
});
|
|
|
|
{
|
|
std::lock_guard<std::mutex> lock(concurrent_synchronous_requests_mutex);
|
|
++concurrent_synchronous_requests;
|
|
}
|
|
io_service->run();
|
|
{
|
|
std::lock_guard<std::mutex> lock(concurrent_synchronous_requests_mutex);
|
|
--concurrent_synchronous_requests;
|
|
if(!concurrent_synchronous_requests)
|
|
io_service->reset();
|
|
}
|
|
|
|
if(ec)
|
|
throw system_error(ec);
|
|
|
|
return response;
|
|
}
|
|
|
|
/// Convenience function to perform synchronous request. The io_service is run within this function.
|
|
/// If reusing the io_service for other tasks, use the asynchronous request functions instead.
|
|
/// Do not use concurrently with the asynchronous request functions.
|
|
std::shared_ptr<Response> request(const std::string &method, const std::string &path, std::istream &content,
|
|
const CaseInsensitiveMultimap &header = CaseInsensitiveMultimap()) {
|
|
std::shared_ptr<Response> response;
|
|
error_code ec;
|
|
request(method, path, content, header, [&response, &ec](std::shared_ptr<Response> response_, const error_code &ec_) {
|
|
response = response_;
|
|
ec = ec_;
|
|
});
|
|
|
|
{
|
|
std::lock_guard<std::mutex> lock(concurrent_synchronous_requests_mutex);
|
|
++concurrent_synchronous_requests;
|
|
}
|
|
io_service->run();
|
|
{
|
|
std::lock_guard<std::mutex> lock(concurrent_synchronous_requests_mutex);
|
|
--concurrent_synchronous_requests;
|
|
if(!concurrent_synchronous_requests)
|
|
io_service->reset();
|
|
}
|
|
|
|
if(ec)
|
|
throw system_error(ec);
|
|
|
|
return response;
|
|
}
|
|
|
|
/// Asynchronous request where setting and/or running Client's io_service is required.
|
|
/// Do not use concurrently with the synchronous request functions.
|
|
void request(const std::string &method, const std::string &path, string_view content, const CaseInsensitiveMultimap &header,
|
|
std::function<void(std::shared_ptr<Response>, const error_code &)> &&request_callback_) {
|
|
auto session = std::make_shared<Session>(config.max_response_streambuf_size, get_connection(), create_request_header(method, path, header));
|
|
auto response = session->response;
|
|
auto request_callback = std::make_shared<std::function<void(std::shared_ptr<Response>, const error_code &)>>(std::move(request_callback_));
|
|
session->callback = [this, response, request_callback](const std::shared_ptr<Connection> &connection, const error_code &ec) {
|
|
{
|
|
std::lock_guard<std::mutex> lock(this->connections_mutex);
|
|
connection->in_use = false;
|
|
|
|
// Remove unused connections, but keep one open for HTTP persistent connection:
|
|
std::size_t unused_connections = 0;
|
|
for(auto it = this->connections.begin(); it != this->connections.end();) {
|
|
if(ec && connection == *it)
|
|
it = this->connections.erase(it);
|
|
else if((*it)->in_use)
|
|
++it;
|
|
else {
|
|
++unused_connections;
|
|
if(unused_connections > 1)
|
|
it = this->connections.erase(it);
|
|
else
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(*request_callback)
|
|
(*request_callback)(response, ec);
|
|
};
|
|
|
|
std::ostream write_stream(session->request_streambuf.get());
|
|
if(content.size() > 0) {
|
|
auto header_it = header.find("Content-Length");
|
|
if(header_it == header.end()) {
|
|
header_it = header.find("Transfer-Encoding");
|
|
if(header_it == header.end() || header_it->second != "chunked")
|
|
write_stream << "Content-Length: " << content.size() << "\r\n";
|
|
}
|
|
}
|
|
write_stream << "\r\n"
|
|
<< content;
|
|
|
|
connect(session);
|
|
}
|
|
|
|
/// Asynchronous request where setting and/or running Client's io_service is required.
|
|
/// Do not use concurrently with the synchronous request functions.
|
|
void request(const std::string &method, const std::string &path, string_view content,
|
|
std::function<void(std::shared_ptr<Response>, const error_code &)> &&request_callback_) {
|
|
request(method, path, content, CaseInsensitiveMultimap(), std::move(request_callback_));
|
|
}
|
|
|
|
/// Asynchronous request where setting and/or running Client's io_service is required.
|
|
void request(const std::string &method, const std::string &path,
|
|
std::function<void(std::shared_ptr<Response>, const error_code &)> &&request_callback_) {
|
|
request(method, path, std::string(), CaseInsensitiveMultimap(), std::move(request_callback_));
|
|
}
|
|
|
|
/// Asynchronous request where setting and/or running Client's io_service is required.
|
|
void request(const std::string &method, std::function<void(std::shared_ptr<Response>, const error_code &)> &&request_callback_) {
|
|
request(method, std::string("/"), std::string(), CaseInsensitiveMultimap(), std::move(request_callback_));
|
|
}
|
|
|
|
/// Asynchronous request where setting and/or running Client's io_service is required.
|
|
void request(const std::string &method, const std::string &path, std::istream &content, const CaseInsensitiveMultimap &header,
|
|
std::function<void(std::shared_ptr<Response>, const error_code &)> &&request_callback_) {
|
|
auto session = std::make_shared<Session>(config.max_response_streambuf_size, get_connection(), create_request_header(method, path, header));
|
|
auto response = session->response;
|
|
auto request_callback = std::make_shared<std::function<void(std::shared_ptr<Response>, const error_code &)>>(std::move(request_callback_));
|
|
session->callback = [this, response, request_callback](const std::shared_ptr<Connection> &connection, const error_code &ec) {
|
|
{
|
|
std::lock_guard<std::mutex> lock(this->connections_mutex);
|
|
connection->in_use = false;
|
|
|
|
// Remove unused connections, but keep one open for HTTP persistent connection:
|
|
std::size_t unused_connections = 0;
|
|
for(auto it = this->connections.begin(); it != this->connections.end();) {
|
|
if(ec && connection == *it)
|
|
it = this->connections.erase(it);
|
|
else if((*it)->in_use)
|
|
++it;
|
|
else {
|
|
++unused_connections;
|
|
if(unused_connections > 1)
|
|
it = this->connections.erase(it);
|
|
else
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(*request_callback)
|
|
(*request_callback)(response, ec);
|
|
};
|
|
|
|
content.seekg(0, std::ios::end);
|
|
auto content_length = content.tellg();
|
|
content.seekg(0, std::ios::beg);
|
|
std::ostream write_stream(session->request_streambuf.get());
|
|
if(content_length > 0) {
|
|
auto header_it = header.find("Content-Length");
|
|
if(header_it == header.end()) {
|
|
header_it = header.find("Transfer-Encoding");
|
|
if(header_it == header.end() || header_it->second != "chunked")
|
|
write_stream << "Content-Length: " << content_length << "\r\n";
|
|
}
|
|
}
|
|
write_stream << "\r\n";
|
|
if(content_length > 0)
|
|
write_stream << content.rdbuf();
|
|
|
|
connect(session);
|
|
}
|
|
|
|
/// Asynchronous request where setting and/or running Client's io_service is required.
|
|
void request(const std::string &method, const std::string &path, std::istream &content,
|
|
std::function<void(std::shared_ptr<Response>, const error_code &)> &&request_callback_) {
|
|
request(method, path, content, CaseInsensitiveMultimap(), std::move(request_callback_));
|
|
}
|
|
|
|
/// Close connections
|
|
void stop() noexcept {
|
|
std::lock_guard<std::mutex> lock(connections_mutex);
|
|
for(auto it = connections.begin(); it != connections.end();) {
|
|
error_code ec;
|
|
(*it)->socket->lowest_layer().cancel(ec);
|
|
it = connections.erase(it);
|
|
}
|
|
}
|
|
|
|
virtual ~ClientBase() noexcept {
|
|
handler_runner->stop();
|
|
stop();
|
|
}
|
|
|
|
protected:
|
|
bool internal_io_service = false;
|
|
|
|
std::string host;
|
|
unsigned short port;
|
|
unsigned short default_port;
|
|
|
|
std::unique_ptr<asio::ip::tcp::resolver::query> query;
|
|
|
|
std::unordered_set<std::shared_ptr<Connection>> connections;
|
|
std::mutex connections_mutex;
|
|
|
|
std::shared_ptr<ScopeRunner> handler_runner;
|
|
|
|
std::size_t concurrent_synchronous_requests = 0;
|
|
std::mutex concurrent_synchronous_requests_mutex;
|
|
|
|
ClientBase(const std::string &host_port, unsigned short default_port) noexcept : default_port(default_port), handler_runner(new ScopeRunner()) {
|
|
auto parsed_host_port = parse_host_port(host_port, default_port);
|
|
host = parsed_host_port.first;
|
|
port = parsed_host_port.second;
|
|
}
|
|
|
|
std::shared_ptr<Connection> get_connection() noexcept {
|
|
std::shared_ptr<Connection> connection;
|
|
std::lock_guard<std::mutex> lock(connections_mutex);
|
|
|
|
if(!io_service) {
|
|
io_service = std::make_shared<asio::io_service>();
|
|
internal_io_service = true;
|
|
}
|
|
|
|
for(auto it = connections.begin(); it != connections.end(); ++it) {
|
|
if(!(*it)->in_use) {
|
|
connection = *it;
|
|
break;
|
|
}
|
|
}
|
|
if(!connection) {
|
|
connection = create_connection();
|
|
connections.emplace(connection);
|
|
}
|
|
connection->attempt_reconnect = true;
|
|
connection->in_use = true;
|
|
|
|
if(!query) {
|
|
if(config.proxy_server.empty())
|
|
query = std::unique_ptr<asio::ip::tcp::resolver::query>(new asio::ip::tcp::resolver::query(host, std::to_string(port)));
|
|
else {
|
|
auto proxy_host_port = parse_host_port(config.proxy_server, 8080);
|
|
query = std::unique_ptr<asio::ip::tcp::resolver::query>(new asio::ip::tcp::resolver::query(proxy_host_port.first, std::to_string(proxy_host_port.second)));
|
|
}
|
|
}
|
|
|
|
return connection;
|
|
}
|
|
|
|
std::pair<std::string, unsigned short> parse_host_port(const std::string &host_port, unsigned short default_port) const noexcept {
|
|
std::pair<std::string, unsigned short> parsed_host_port;
|
|
std::size_t host_end = host_port.find(':');
|
|
if(host_end == std::string::npos) {
|
|
parsed_host_port.first = host_port;
|
|
parsed_host_port.second = default_port;
|
|
}
|
|
else {
|
|
parsed_host_port.first = host_port.substr(0, host_end);
|
|
parsed_host_port.second = static_cast<unsigned short>(stoul(host_port.substr(host_end + 1)));
|
|
}
|
|
return parsed_host_port;
|
|
}
|
|
|
|
virtual std::shared_ptr<Connection> create_connection() noexcept = 0;
|
|
virtual void connect(const std::shared_ptr<Session> &) = 0;
|
|
|
|
std::unique_ptr<asio::streambuf> create_request_header(const std::string &method, const std::string &path, const CaseInsensitiveMultimap &header) const {
|
|
auto corrected_path = path;
|
|
if(corrected_path == "")
|
|
corrected_path = "/";
|
|
if(!config.proxy_server.empty() && std::is_same<socket_type, asio::ip::tcp::socket>::value)
|
|
corrected_path = "http://" + host + ':' + std::to_string(port) + corrected_path;
|
|
|
|
std::unique_ptr<asio::streambuf> streambuf(new asio::streambuf());
|
|
std::ostream write_stream(streambuf.get());
|
|
write_stream << method << " " << corrected_path << " HTTP/1.1\r\n";
|
|
write_stream << "Host: " << host;
|
|
if(port != default_port)
|
|
write_stream << ':' << std::to_string(port);
|
|
write_stream << "\r\n";
|
|
for(auto &h : header)
|
|
write_stream << h.first << ": " << h.second << "\r\n";
|
|
return streambuf;
|
|
}
|
|
|
|
void write(const std::shared_ptr<Session> &session) {
|
|
session->connection->set_timeout();
|
|
asio::async_write(*session->connection->socket, session->request_streambuf->data(), [this, session](const error_code &ec, std::size_t /*bytes_transferred*/) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if(!ec)
|
|
this->read(session);
|
|
else
|
|
session->callback(session->connection, ec);
|
|
});
|
|
}
|
|
|
|
void read(const std::shared_ptr<Session> &session) {
|
|
session->connection->set_timeout();
|
|
asio::async_read_until(*session->connection->socket, session->response->streambuf, "\r\n\r\n", [this, session](const error_code &ec, std::size_t bytes_transferred) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if((!ec || ec == asio::error::not_found) && session->response->streambuf.size() == session->response->streambuf.max_size()) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::message_size));
|
|
return;
|
|
}
|
|
if(!ec) {
|
|
session->connection->attempt_reconnect = true;
|
|
std::size_t num_additional_bytes = session->response->streambuf.size() - bytes_transferred;
|
|
|
|
if(!ResponseMessage::parse(session->response->content, session->response->http_version, session->response->status_code, session->response->header)) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::protocol_error));
|
|
return;
|
|
}
|
|
|
|
auto header_it = session->response->header.find("Content-Length");
|
|
if(header_it != session->response->header.end()) {
|
|
auto content_length = stoull(header_it->second);
|
|
if(content_length > num_additional_bytes) {
|
|
session->connection->set_timeout();
|
|
asio::async_read(*session->connection->socket, session->response->streambuf, asio::transfer_exactly(content_length - num_additional_bytes), [session](const error_code &ec, std::size_t /*bytes_transferred*/) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if(!ec) {
|
|
if(session->response->streambuf.size() == session->response->streambuf.max_size()) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::message_size));
|
|
return;
|
|
}
|
|
session->callback(session->connection, ec);
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
});
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
}
|
|
else if((header_it = session->response->header.find("Transfer-Encoding")) != session->response->header.end() && header_it->second == "chunked") {
|
|
auto chunks_streambuf = std::make_shared<asio::streambuf>(this->config.max_response_streambuf_size);
|
|
this->read_chunked_transfer_encoded(session, chunks_streambuf);
|
|
}
|
|
else if(session->response->http_version < "1.1" || ((header_it = session->response->header.find("Session")) != session->response->header.end() && header_it->second == "close")) {
|
|
session->connection->set_timeout();
|
|
asio::async_read(*session->connection->socket, session->response->streambuf, [session](const error_code &ec, std::size_t /*bytes_transferred*/) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if(!ec) {
|
|
if(session->response->streambuf.size() == session->response->streambuf.max_size()) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::message_size));
|
|
return;
|
|
}
|
|
session->callback(session->connection, ec);
|
|
}
|
|
else
|
|
session->callback(session->connection, ec == asio::error::eof ? error_code() : ec);
|
|
});
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
}
|
|
else {
|
|
if(session->connection->attempt_reconnect && ec != asio::error::operation_aborted) {
|
|
std::unique_lock<std::mutex> lock(connections_mutex);
|
|
auto it = connections.find(session->connection);
|
|
if(it != connections.end()) {
|
|
connections.erase(it);
|
|
session->connection = create_connection();
|
|
session->connection->attempt_reconnect = false;
|
|
session->connection->in_use = true;
|
|
connections.emplace(session->connection);
|
|
lock.unlock();
|
|
this->connect(session);
|
|
}
|
|
else {
|
|
lock.unlock();
|
|
session->callback(session->connection, ec);
|
|
}
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
}
|
|
});
|
|
}
|
|
|
|
void read_chunked_transfer_encoded(const std::shared_ptr<Session> &session, const std::shared_ptr<asio::streambuf> &chunks_streambuf) {
|
|
session->connection->set_timeout();
|
|
asio::async_read_until(*session->connection->socket, session->response->streambuf, "\r\n", [this, session, chunks_streambuf](const error_code &ec, size_t bytes_transferred) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if((!ec || ec == asio::error::not_found) && session->response->streambuf.size() == session->response->streambuf.max_size()) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::message_size));
|
|
return;
|
|
}
|
|
if(!ec) {
|
|
std::string line;
|
|
getline(session->response->content, line);
|
|
bytes_transferred -= line.size() + 1;
|
|
line.pop_back();
|
|
unsigned long length = 0;
|
|
try {
|
|
length = stoul(line, 0, 16);
|
|
}
|
|
catch(...) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::protocol_error));
|
|
return;
|
|
}
|
|
|
|
auto num_additional_bytes = session->response->streambuf.size() - bytes_transferred;
|
|
|
|
if((2 + length) > num_additional_bytes) {
|
|
session->connection->set_timeout();
|
|
asio::async_read(*session->connection->socket, session->response->streambuf, asio::transfer_exactly(2 + length - num_additional_bytes), [this, session, chunks_streambuf, length](const error_code &ec, size_t /*bytes_transferred*/) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if(!ec) {
|
|
if(session->response->streambuf.size() == session->response->streambuf.max_size()) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::message_size));
|
|
return;
|
|
}
|
|
this->read_chunked_transfer_encoded_chunk(session, chunks_streambuf, length);
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
});
|
|
}
|
|
else
|
|
this->read_chunked_transfer_encoded_chunk(session, chunks_streambuf, length);
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
});
|
|
}
|
|
|
|
void read_chunked_transfer_encoded_chunk(const std::shared_ptr<Session> &session, const std::shared_ptr<asio::streambuf> &chunks_streambuf, unsigned long length) {
|
|
std::ostream tmp_stream(chunks_streambuf.get());
|
|
if(length > 0) {
|
|
std::unique_ptr<char[]> buffer(new char[length]);
|
|
session->response->content.read(buffer.get(), static_cast<std::streamsize>(length));
|
|
tmp_stream.write(buffer.get(), static_cast<std::streamsize>(length));
|
|
if(chunks_streambuf->size() == chunks_streambuf->max_size()) {
|
|
session->callback(session->connection, make_error_code::make_error_code(errc::message_size));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Remove "\r\n"
|
|
session->response->content.get();
|
|
session->response->content.get();
|
|
|
|
if(length > 0)
|
|
read_chunked_transfer_encoded(session, chunks_streambuf);
|
|
else {
|
|
if(chunks_streambuf->size() > 0) {
|
|
std::ostream ostream(&session->response->streambuf);
|
|
ostream << chunks_streambuf.get();
|
|
}
|
|
error_code ec;
|
|
session->callback(session->connection, ec);
|
|
}
|
|
}
|
|
};
|
|
|
|
template <class socket_type>
|
|
class Client : public ClientBase<socket_type> {};
|
|
|
|
using HTTP = asio::ip::tcp::socket;
|
|
|
|
template <>
|
|
class Client<HTTP> : public ClientBase<HTTP> {
|
|
public:
|
|
Client(const std::string &server_port_path) noexcept : ClientBase<HTTP>::ClientBase(server_port_path, 80) {}
|
|
|
|
protected:
|
|
std::shared_ptr<Connection> create_connection() noexcept override {
|
|
return std::make_shared<Connection>(handler_runner, config.timeout, *io_service);
|
|
}
|
|
|
|
void connect(const std::shared_ptr<Session> &session) override {
|
|
if(!session->connection->socket->lowest_layer().is_open()) {
|
|
auto resolver = std::make_shared<asio::ip::tcp::resolver>(*io_service);
|
|
session->connection->set_timeout(config.timeout_connect);
|
|
resolver->async_resolve(*query, [this, session, resolver](const error_code &ec, asio::ip::tcp::resolver::iterator it) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if(!ec) {
|
|
session->connection->set_timeout(config.timeout_connect);
|
|
asio::async_connect(*session->connection->socket, it, [this, session, resolver](const error_code &ec, asio::ip::tcp::resolver::iterator /*it*/) {
|
|
session->connection->cancel_timeout();
|
|
auto lock = session->connection->handler_runner->continue_lock();
|
|
if(!lock)
|
|
return;
|
|
if(!ec) {
|
|
asio::ip::tcp::no_delay option(true);
|
|
error_code ec;
|
|
session->connection->socket->set_option(option, ec);
|
|
this->write(session);
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
});
|
|
}
|
|
else
|
|
session->callback(session->connection, ec);
|
|
});
|
|
}
|
|
else
|
|
write(session);
|
|
}
|
|
};
|
|
} // namespace SimpleWeb
|
|
|
|
#endif /* CLIENT_HTTP_HPP */
|