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/*
* Authored by Alex Hultman, 2018-2020.
* Intellectual property of third-party.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef UWS_HTTPRESPONSEDATA_H
#define UWS_HTTPRESPONSEDATA_H
/* This data belongs to the HttpResponse */
#include "HttpParser.h"
#include "AsyncSocketData.h"
#include "ProxyParser.h"
#include "MoveOnlyFunction.h"
namespace uWS {
template <bool SSL>
struct HttpResponseData : AsyncSocketData<SSL>, HttpParser {
template <bool> friend struct HttpResponse;
template <bool> friend struct HttpContext;
/* When we are done with a response we mark it like so */
void markDone() {
onAborted = nullptr;
/* Also remove onWritable so that we do not emit when draining behind the scenes. */
onWritable = nullptr;
/* We are done with this request */
state &= ~HttpResponseData<SSL>::HTTP_RESPONSE_PENDING;
}
/* Caller of onWritable. It is possible onWritable calls markDone so we need to borrow it. */
bool callOnWritable(uintmax_t offset) {
/* Borrow real onWritable */
MoveOnlyFunction<bool(uintmax_t)> borrowedOnWritable = std::move(onWritable);
/* Set onWritable to placeholder */
onWritable = [](uintmax_t) {return true;};
/* Run borrowed onWritable */
bool ret = borrowedOnWritable(offset);
/* If we still have onWritable (the placeholder) then move back the real one */
if (onWritable) {
/* We haven't reset onWritable, so give it back */
onWritable = std::move(borrowedOnWritable);
}
return ret;
}
private:
/* Bits of status */
enum {
HTTP_STATUS_CALLED = 1, // used
HTTP_WRITE_CALLED = 2, // used
HTTP_END_CALLED = 4, // used
HTTP_RESPONSE_PENDING = 8, // used
HTTP_CONNECTION_CLOSE = 16 // used
};
/* Per socket event handlers */
MoveOnlyFunction<bool(uintmax_t)> onWritable;
MoveOnlyFunction<void()> onAborted;
MoveOnlyFunction<void(std::string_view, bool)> inStream; // onData
/* Outgoing offset */
uintmax_t offset = 0;
/* Let's track number of bytes since last timeout reset in data handler */
unsigned int received_bytes_per_timeout = 0;
/* Current state (content-length sent, status sent, write called, etc */
int state = 0;
#ifdef UWS_WITH_PROXY
ProxyParser proxyParser;
#endif
};
}
#endif // UWS_HTTPRESPONSEDATA_H