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#pragma once
#include "http_utility.hpp"
#include <atomic>
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/asio/io_service.hpp>
#include <boost/asio/ip/tcp.hpp>
#include <boost/beast/core/flat_static_buffer.hpp>
#include <boost/beast/http.hpp>
#include <boost/beast/websocket.hpp>
#include <chrono>
#include <vector>
#include "crow/http_response.h"
#include "crow/logging.h"
#include "crow/middleware_context.h"
#include "crow/socket_adaptors.h"
#include "crow/timer_queue.h"
#include "crow/utility.h"
#ifdef BMCWEB_ENABLE_SSL
#include <boost/asio/ssl/stream.hpp>
#endif
namespace crow
{
inline void prettyPrintJson(crow::Response& res)
{
std::string value = res.jsonValue.dump(4, ' ', true);
utility::escapeHtml(value);
utility::convertToLinks(value);
res.body() = "<html>\n"
"<head>\n"
"<title>Redfish API</title>\n"
"<link rel=\"stylesheet\" type=\"text/css\" "
"href=\"/styles/default.css\">\n"
"<script src=\"/highlight.pack.js\"></script>"
"<script>hljs.initHighlightingOnLoad();</script>"
"</head>\n"
"<body>\n"
"<div style=\"max-width: 576px;margin:0 auto;\">\n"
"<img src=\"/DMTF_Redfish_logo_2017.svg\" alt=\"redfish\" "
"height=\"406px\" "
"width=\"576px\">\n"
"<br>\n"
"<pre>\n"
"<code class=\"json\">" +
value +
"</code>\n"
"</pre>\n"
"</div>\n"
"</body>\n"
"</html>\n";
res.addHeader("Content-Type", "text/html;charset=UTF-8");
}
using namespace boost;
using tcp = asio::ip::tcp;
namespace detail
{
template <typename MW> struct CheckBeforeHandleArity3Const
{
template <typename T,
void (T::*)(Request&, Response&, typename MW::Context&) const =
&T::beforeHandle>
struct Get
{
};
};
template <typename MW> struct CheckBeforeHandleArity3
{
template <typename T, void (T::*)(Request&, Response&,
typename MW::Context&) = &T::beforeHandle>
struct Get
{
};
};
template <typename MW> struct CheckAfterHandleArity3Const
{
template <typename T,
void (T::*)(Request&, Response&, typename MW::Context&) const =
&T::afterHandle>
struct Get
{
};
};
template <typename MW> struct CheckAfterHandleArity3
{
template <typename T, void (T::*)(Request&, Response&,
typename MW::Context&) = &T::afterHandle>
struct Get
{
};
};
template <typename T> struct IsBeforeHandleArity3Impl
{
template <typename C>
static std::true_type
f(typename CheckBeforeHandleArity3Const<T>::template Get<C>*);
template <typename C>
static std::true_type
f(typename CheckBeforeHandleArity3<T>::template Get<C>*);
template <typename C> static std::false_type f(...);
public:
static const bool value = decltype(f<T>(nullptr))::value;
};
template <typename T> struct IsAfterHandleArity3Impl
{
template <typename C>
static std::true_type
f(typename CheckAfterHandleArity3Const<T>::template Get<C>*);
template <typename C>
static std::true_type
f(typename CheckAfterHandleArity3<T>::template Get<C>*);
template <typename C> static std::false_type f(...);
public:
static const bool value = decltype(f<T>(nullptr))::value;
};
template <typename MW, typename Context, typename ParentContext>
typename std::enable_if<!IsBeforeHandleArity3Impl<MW>::value>::type
beforeHandlerCall(MW& mw, Request& req, Response& res, Context& ctx,
ParentContext& /*parent_ctx*/)
{
mw.beforeHandle(req, res, ctx.template get<MW>(), ctx);
}
template <typename MW, typename Context, typename ParentContext>
typename std::enable_if<IsBeforeHandleArity3Impl<MW>::value>::type
beforeHandlerCall(MW& mw, Request& req, Response& res, Context& ctx,
ParentContext& /*parent_ctx*/)
{
mw.beforeHandle(req, res, ctx.template get<MW>());
}
template <typename MW, typename Context, typename ParentContext>
typename std::enable_if<!IsAfterHandleArity3Impl<MW>::value>::type
afterHandlerCall(MW& mw, Request& req, Response& res, Context& ctx,
ParentContext& /*parent_ctx*/)
{
mw.afterHandle(req, res, ctx.template get<MW>(), ctx);
}
template <typename MW, typename Context, typename ParentContext>
typename std::enable_if<IsAfterHandleArity3Impl<MW>::value>::type
afterHandlerCall(MW& mw, Request& req, Response& res, Context& ctx,
ParentContext& /*parent_ctx*/)
{
mw.afterHandle(req, res, ctx.template get<MW>());
}
template <int N, typename Context, typename Container, typename CurrentMW,
typename... Middlewares>
bool middlewareCallHelper(Container& middlewares, Request& req, Response& res,
Context& ctx)
{
using parent_context_t = typename Context::template partial<N - 1>;
beforeHandlerCall<CurrentMW, Context, parent_context_t>(
std::get<N>(middlewares), req, res, ctx,
static_cast<parent_context_t&>(ctx));
if (res.isCompleted())
{
afterHandlerCall<CurrentMW, Context, parent_context_t>(
std::get<N>(middlewares), req, res, ctx,
static_cast<parent_context_t&>(ctx));
return true;
}
if (middlewareCallHelper<N + 1, Context, Container, Middlewares...>(
middlewares, req, res, ctx))
{
afterHandlerCall<CurrentMW, Context, parent_context_t>(
std::get<N>(middlewares), req, res, ctx,
static_cast<parent_context_t&>(ctx));
return true;
}
return false;
}
template <int N, typename Context, typename Container>
bool middlewareCallHelper(Container& /*middlewares*/, Request& /*req*/,
Response& /*res*/, Context& /*ctx*/)
{
return false;
}
template <int N, typename Context, typename Container>
typename std::enable_if<(N < 0)>::type
afterHandlersCallHelper(Container& /*middlewares*/, Context& /*Context*/,
Request& /*req*/, Response& /*res*/)
{
}
template <int N, typename Context, typename Container>
typename std::enable_if<(N == 0)>::type
afterHandlersCallHelper(Container& middlewares, Context& ctx, Request& req,
Response& res)
{
using parent_context_t = typename Context::template partial<N - 1>;
using CurrentMW = typename std::tuple_element<
N, typename std::remove_reference<Container>::type>::type;
afterHandlerCall<CurrentMW, Context, parent_context_t>(
std::get<N>(middlewares), req, res, ctx,
static_cast<parent_context_t&>(ctx));
}
template <int N, typename Context, typename Container>
typename std::enable_if<(N > 0)>::type
afterHandlersCallHelper(Container& middlewares, Context& ctx, Request& req,
Response& res)
{
using parent_context_t = typename Context::template partial<N - 1>;
using CurrentMW = typename std::tuple_element<
N, typename std::remove_reference<Container>::type>::type;
afterHandlerCall<CurrentMW, Context, parent_context_t>(
std::get<N>(middlewares), req, res, ctx,
static_cast<parent_context_t&>(ctx));
afterHandlersCallHelper<N - 1, Context, Container>(middlewares, ctx, req,
res);
}
} // namespace detail
#ifdef BMCWEB_ENABLE_DEBUG
static std::atomic<int> connectionCount;
#endif
// request body limit size: 30M
constexpr unsigned int httpReqBodyLimit = 1024 * 1024 * 30;
template <typename Adaptor, typename Handler, typename... Middlewares>
class Connection
{
public:
Connection(boost::asio::io_service& ioService, Handler* handler,
const std::string& server_name,
std::tuple<Middlewares...>* middlewares,
std::function<std::string()>& get_cached_date_str_f,
detail::TimerQueue& timerQueue,
typename Adaptor::context* adaptorCtx) :
adaptor(ioService, adaptorCtx),
handler(handler), serverName(server_name), middlewares(middlewares),
getCachedDateStr(get_cached_date_str_f), timerQueue(timerQueue)
{
parser.emplace(std::piecewise_construct, std::make_tuple());
// Temporarily changed to 30MB; Need to modify uploading/authentication
// mechanism
parser->body_limit(httpReqBodyLimit);
req.emplace(parser->get());
#ifdef BMCWEB_ENABLE_DEBUG
connectionCount++;
BMCWEB_LOG_DEBUG << this << " Connection open, total "
<< connectionCount;
#endif
}
~Connection()
{
res.completeRequestHandler = nullptr;
cancelDeadlineTimer();
#ifdef BMCWEB_ENABLE_DEBUG
connectionCount--;
BMCWEB_LOG_DEBUG << this << " Connection closed, total "
<< connectionCount;
#endif
}
decltype(std::declval<Adaptor>().rawSocket())& socket()
{
return adaptor.rawSocket();
}
void start()
{
adaptor.start([this](const boost::system::error_code& ec) {
if (!ec)
{
startDeadline();
doReadHeaders();
}
else
{
checkDestroy();
}
});
}
void handle()
{
cancelDeadlineTimer();
bool isInvalidRequest = false;
const boost::string_view connection =
req->getHeaderValue(boost::beast::http::field::connection);
// Check for HTTP version 1.1.
if (req->version() == 11)
{
if (req->getHeaderValue(boost::beast::http::field::host).empty())
{
isInvalidRequest = true;
res = Response(boost::beast::http::status::bad_request);
}
}
BMCWEB_LOG_INFO << "Request: " << adaptor.remoteEndpoint() << " "
<< this << " HTTP/" << req->version() / 10 << "."
<< req->version() % 10 << ' ' << req->methodString()
<< " " << req->target();
needToCallAfterHandlers = false;
if (!isInvalidRequest)
{
res.completeRequestHandler = [] {};
res.isAliveHelper = [this]() -> bool { return adaptor.isOpen(); };
ctx = detail::Context<Middlewares...>();
req->middlewareContext = (void*)&ctx;
req->ioService = &adaptor.getIoService();
detail::middlewareCallHelper<
0, decltype(ctx), decltype(*middlewares), Middlewares...>(
*middlewares, *req, res, ctx);
if (!res.completed)
{
if (req->isUpgrade() &&
boost::iequals(
req->getHeaderValue(boost::beast::http::field::upgrade),
"websocket"))
{
handler->handleUpgrade(*req, res, std::move(adaptor));
return;
}
res.completeRequestHandler = [this] {
this->completeRequest();
};
needToCallAfterHandlers = true;
handler->handle(*req, res);
if (req->keepAlive())
{
res.addHeader("connection", "Keep-Alive");
}
}
else
{
completeRequest();
}
}
else
{
completeRequest();
}
}
void completeRequest()
{
BMCWEB_LOG_INFO << "Response: " << this << ' ' << req->url << ' '
<< res.resultInt() << " keepalive=" << req->keepAlive();
if (needToCallAfterHandlers)
{
needToCallAfterHandlers = false;
// call all afterHandler of middlewares
detail::afterHandlersCallHelper<((int)sizeof...(Middlewares) - 1),
decltype(ctx),
decltype(*middlewares)>(
*middlewares, ctx, *req, res);
}
// auto self = this->shared_from_this();
res.completeRequestHandler = nullptr;
if (!adaptor.isOpen())
{
// BMCWEB_LOG_DEBUG << this << " delete (socket is closed) " <<
// isReading
// << ' ' << isWriting;
// delete this;
return;
}
if (res.body().empty() && !res.jsonValue.empty())
{
if (http_helpers::requestPrefersHtml(*req))
{
prettyPrintJson(res);
}
else
{
res.jsonMode();
res.body() = res.jsonValue.dump(2, ' ', true);
}
}
if (res.resultInt() >= 400 && res.body().empty())
{
res.body() = std::string(res.reason());
}
res.addHeader(boost::beast::http::field::server, serverName);
res.addHeader(boost::beast::http::field::date, getCachedDateStr());
res.keepAlive(req->keepAlive());
doWrite();
}
private:
void doReadHeaders()
{
// auto self = this->shared_from_this();
isReading = true;
BMCWEB_LOG_DEBUG << this << " doReadHeaders";
// Clean up any previous Connection.
boost::beast::http::async_read_header(
adaptor.socket(), buffer, *parser,
[this](const boost::system::error_code& ec,
std::size_t bytes_transferred) {
isReading = false;
BMCWEB_LOG_ERROR << this << " async_read_header "
<< bytes_transferred << " Bytes";
bool errorWhileReading = false;
if (ec)
{
errorWhileReading = true;
BMCWEB_LOG_ERROR
<< this << " Error while reading: " << ec.message();
}
else
{
// if the adaptor isn't open anymore, and wasn't handed to a
// websocket, treat as an error
if (!adaptor.isOpen() && !req->isUpgrade())
{
errorWhileReading = true;
}
}
if (errorWhileReading)
{
cancelDeadlineTimer();
adaptor.close();
BMCWEB_LOG_DEBUG << this << " from read(1)";
checkDestroy();
return;
}
// Compute the url parameters for the request
req->url = req->target();
std::size_t index = req->url.find("?");
if (index != boost::string_view::npos)
{
req->url = req->url.substr(0, index);
}
req->urlParams = QueryString(std::string(req->target()));
doRead();
});
}
void doRead()
{
// auto self = this->shared_from_this();
isReading = true;
BMCWEB_LOG_DEBUG << this << " doRead";
boost::beast::http::async_read(
adaptor.socket(), buffer, *parser,
[this](const boost::system::error_code& ec,
std::size_t bytes_transferred) {
BMCWEB_LOG_ERROR << this << " async_read " << bytes_transferred
<< " Bytes";
isReading = false;
bool errorWhileReading = false;
if (ec)
{
BMCWEB_LOG_ERROR << "Error while reading: " << ec.message();
errorWhileReading = true;
}
else
{
if (!adaptor.isOpen())
{
errorWhileReading = true;
}
}
if (errorWhileReading)
{
cancelDeadlineTimer();
adaptor.close();
BMCWEB_LOG_DEBUG << this << " from read(1)";
checkDestroy();
return;
}
handle();
});
}
void doWrite()
{
// auto self = this->shared_from_this();
isWriting = true;
BMCWEB_LOG_DEBUG << "Doing Write";
res.preparePayload();
serializer.emplace(*res.stringResponse);
boost::beast::http::async_write(
adaptor.socket(), *serializer,
[&](const boost::system::error_code& ec,
std::size_t bytes_transferred) {
isWriting = false;
BMCWEB_LOG_DEBUG << this << " Wrote " << bytes_transferred
<< " bytes";
if (ec)
{
BMCWEB_LOG_DEBUG << this << " from write(2)";
checkDestroy();
return;
}
if (!req->keepAlive())
{
adaptor.close();
BMCWEB_LOG_DEBUG << this << " from write(1)";
checkDestroy();
return;
}
serializer.reset();
BMCWEB_LOG_DEBUG << this << " Clearing response";
res.clear();
parser.emplace(std::piecewise_construct, std::make_tuple());
parser->body_limit(httpReqBodyLimit); // reset body limit for
// newly created parser
buffer.consume(buffer.size());
req.emplace(parser->get());
doReadHeaders();
});
}
void checkDestroy()
{
BMCWEB_LOG_DEBUG << this << " isReading " << isReading << " isWriting "
<< isWriting;
if (!isReading && !isWriting)
{
BMCWEB_LOG_DEBUG << this << " delete (idle) ";
delete this;
}
}
void cancelDeadlineTimer()
{
BMCWEB_LOG_DEBUG << this << " timer cancelled: " << &timerQueue << ' '
<< timerCancelKey;
timerQueue.cancel(timerCancelKey);
}
void startDeadline()
{
cancelDeadlineTimer();
timerCancelKey = timerQueue.add([this] {
if (!adaptor.isOpen())
{
return;
}
adaptor.close();
});
BMCWEB_LOG_DEBUG << this << " timer added: " << &timerQueue << ' '
<< timerCancelKey;
}
private:
Adaptor adaptor;
Handler* handler;
// Making this a std::optional allows it to be efficiently destroyed and
// re-created on Connection reset
std::optional<
boost::beast::http::request_parser<boost::beast::http::string_body>>
parser;
boost::beast::flat_static_buffer<8192> buffer;
std::optional<boost::beast::http::response_serializer<
boost::beast::http::string_body>>
serializer;
std::optional<crow::Request> req;
crow::Response res;
const std::string& serverName;
int timerCancelKey{-1};
bool isReading{};
bool isWriting{};
bool needToCallAfterHandlers{};
bool needToStartReadAfterComplete{};
bool addKeepAlive{};
std::tuple<Middlewares...>* middlewares;
detail::Context<Middlewares...> ctx;
std::function<std::string()>& getCachedDateStr;
detail::TimerQueue& timerQueue;
};
} // namespace crow
|
