Program Listing for File multipart_stream.hpp
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// Copyright (c) 2014, Worcester Polytechnic Institute
// Copyright (c) 2024, The Robot Web Tools Contributors
// All rights reserved.
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//
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//
// * Redistributions in binary form must reproduce the above copyright
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// this software without specific prior written permission.
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#pragma once
#include <queue>
#include <memory>
#include <vector>
#include <string>
#include "rclcpp/rclcpp.hpp"
#include "async_web_server_cpp/http_connection.hpp"
namespace web_video_server
{
struct PendingFooter
{
std::chrono::steady_clock::time_point timestamp;
std::weak_ptr<std::string> contents;
};
class MultipartStream
{
public:
MultipartStream(
async_web_server_cpp::HttpConnectionPtr & connection,
const std::string & boundry = "boundarydonotcross",
std::size_t max_queue_size = 1);
void sendInitialHeader();
void sendPartHeader(
const std::chrono::steady_clock::time_point & time, const std::string & type,
size_t payload_size);
void sendPartFooter(const std::chrono::steady_clock::time_point & time);
void sendPartAndClear(
const std::chrono::steady_clock::time_point & time, const std::string & type,
std::vector<unsigned char> & data);
void sendPart(
const std::chrono::steady_clock::time_point & time, const std::string & type,
const boost::asio::const_buffer & buffer,
async_web_server_cpp::HttpConnection::ResourcePtr resource);
private:
bool isBusy();
private:
const std::size_t max_queue_size_;
async_web_server_cpp::HttpConnectionPtr connection_;
std::string boundry_;
std::queue<PendingFooter> pending_footers_;
};
} // namespace web_video_server