mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2026-06-13 11:41:44 +08:00
添加websocket client支持
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baiyfcu
288
src/Http/WebSocketClient.cpp
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288
src/Http/WebSocketClient.cpp
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#include "WebSocketClient.h"
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int mediakit::WebSocketClient::send(const string& buf)
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{
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if (_sock)
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{
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if (_WSClientStatus == WORKING)
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{
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_session->send(buf);
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return 0;
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}
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else
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{
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return -1;
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}
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}
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}
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void mediakit::WebSocketClient::clear()
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{
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_method.clear();
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_path.clear();
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_parser.Clear();
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_recvedBodySize = 0;
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_totalBodySize = 0;
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_aliveTicker.resetTime();
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_chunkedSplitter.reset();
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HttpRequestSplitter::reset();
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}
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const std::string & mediakit::WebSocketClient::responseStatus() const
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{
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return _parser.Url();
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}
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const mediakit::WebSocketClient::HttpHeader & mediakit::WebSocketClient::responseHeader() const
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{
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return _parser.getValues();
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}
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const mediakit::Parser& mediakit::WebSocketClient::response() const
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{
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return _parser;
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}
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const std::string & mediakit::WebSocketClient::getUrl() const
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{
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return _url;
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}
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int64_t mediakit::WebSocketClient::onResponseHeader(const string &status, const HttpHeader &headers)
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{
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DebugL << status;
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//无Content-Length字段时默认后面全是content
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return -1;
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}
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void mediakit::WebSocketClient::onResponseBody(const char *buf, int64_t size, int64_t recvedSize, int64_t totalSize)
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{
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DebugL << size << " " << recvedSize << " " << totalSize;
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}
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void mediakit::WebSocketClient::onResponseCompleted()
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{
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DebugL;
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}
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int64_t mediakit::WebSocketClient::onRecvHeader(const char *data, uint64_t len)
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{
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_parser.Parse(data);
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if (_parser.Url() == "101")
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{
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switch (_WSClientStatus)
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{
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case HANDSHAKING:
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{
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StrCaseMap& valueMap = _parser.getValues();
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auto key = valueMap.find("Sec-WebSocket-Accept");
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if (key != valueMap.end() && key->second.length() > 0) {
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onConnect(SockException());
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}
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break;
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}
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}
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return -1;
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}
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else
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{
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shutdown(SockException(Err_shutdown, _parser.Url().c_str()));
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return 0;
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}
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return -1;
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}
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void mediakit::WebSocketClient::onRecvContent(const char *data, uint64_t len)
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{
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if (_chunkedSplitter) {
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_chunkedSplitter->input(data, len);
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return;
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}
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auto recvedBodySize = _recvedBodySize + len;
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if (_totalBodySize < 0) {
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//不限长度的content,最大支持INT64_MAX个字节
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onResponseBody(data, len, recvedBodySize, INT64_MAX);
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_recvedBodySize = recvedBodySize;
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return;
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}
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//固定长度的content
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if (recvedBodySize < _totalBodySize) {
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//content还未接收完毕
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onResponseBody(data, len, recvedBodySize, _totalBodySize);
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_recvedBodySize = recvedBodySize;
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return;
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}
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//content接收完毕
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onResponseBody(data, _totalBodySize - _recvedBodySize, _totalBodySize, _totalBodySize);
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bool biggerThanExpected = recvedBodySize > _totalBodySize;
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onResponseCompleted_l();
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if (biggerThanExpected) {
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//声明的content数据比真实的小，那么我们只截取前面部分的并断开链接
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shutdown(SockException(Err_shutdown, "http response content size bigger than expected"));
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}
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}
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void mediakit::WebSocketClient::onConnect(const SockException &ex)
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{
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_aliveTicker.resetTime();
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if (ex) {
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onDisconnect(ex);
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return;
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}
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//先假设http客户端只会接收一点点数据（只接受http头，节省内存）
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_sock->setReadBuffer(std::make_shared<BufferRaw>(1 * 1024));
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_totalBodySize = 0;
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_recvedBodySize = 0;
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HttpRequestSplitter::reset();
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_chunkedSplitter.reset();
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if (_WSClientStatus == WSCONNECT)
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{
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//Websocket握手
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string random = get_random(16);
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auto Sec_WebSocket_Key = encodeBase64(SHA1::encode_bin(random));
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_key = Sec_WebSocket_Key;
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string p = generate_websocket_client_handshake(_ip.c_str(), _port, _url.c_str(), _key.c_str());
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TcpClient::send(p);
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_WSClientStatus = HANDSHAKING;
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}
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else if (_WSClientStatus == HANDSHAKING)
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{
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_WSClientStatus = WORKING;
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}
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onFlush();
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}
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void mediakit::WebSocketClient::onRecv(const Buffer::Ptr &pBuf)
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{
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_aliveTicker.resetTime();
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if (_WSClientStatus == HANDSHAKING || _WSClientStatus == WSCONNECT)
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HttpRequestSplitter::input(pBuf->data(), pBuf->size());
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else if (_WSClientStatus == WORKING)
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{
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WebSocketSplitter::decode((uint8_t *)pBuf->data(), pBuf->size());
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}
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}
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void mediakit::WebSocketClient::onErr(const SockException &ex)
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{
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_session->onError(ex);
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onDisconnect(ex);
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}
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void mediakit::WebSocketClient::onManager()
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{
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if (_WSClientStatus != WORKING)
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{
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if (_fTimeOutSec > 0 && _aliveTicker.elapsedTime() > _fTimeOutSec * 1000) {
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//超时
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shutdown(SockException(Err_timeout, "ws server respone timeout"));
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}
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}
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else
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_session->onManager();
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}
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std::string mediakit::WebSocketClient::generate_websocket_client_handshake(const char* ip, uint16_t port, const char * path, const char * key)
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{
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/**
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* @brief 业务数据被分片的单片最大大小， 等于 65535 - 14 - 1
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*/
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#define DATA_FRAME_MAX_LEN 65520
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#define HANDSHAKE_SIZE 1024
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char buf[HANDSHAKE_SIZE] = { 0 };
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snprintf(buf, HANDSHAKE_SIZE,
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"GET %s HTTP/1.1\r\n"
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"Host: %s:%d\r\n"
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"Upgrade: websocket\r\n"
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"Connection: Upgrade\r\n"
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"Sec-WebSocket-Key: %s\r\n"
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"Sec-WebSocket-Version: 13\r\n"
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"\r\n",
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path, ip, port, key);
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string temBuf(buf);
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return temBuf;
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}
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std::string mediakit::WebSocketClient::get_random(size_t n)
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{
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random_device rd;
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_StrPrinter printer;
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for (int i = 0; i < n; i++)
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{
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unsigned int rnd = rd();
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printer << rnd % 9;
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}
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return string(printer);
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}
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void mediakit::WebSocketClient::onWebSocketDecodeHeader(const WebSocketHeader &packet)
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{
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//新包，原来的包残余数据清空掉
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_remian_data.clear();
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if (_firstPacket) {
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//这是个WebSocket会话而不是普通的Http会话
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_firstPacket = false;
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//此处截取数据并进行websocket协议打包
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}
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}
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void mediakit::WebSocketClient::onWebSocketDecodePlayload(const WebSocketHeader &packet, const uint8_t *ptr, uint64_t len, uint64_t recved)
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{
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_remian_data.append((char *)ptr, len);
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}
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void mediakit::WebSocketClient::onWebSocketDecodeComplete(const WebSocketHeader &header_in)
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{
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WebSocketHeader& header = const_cast<WebSocketHeader&>(header_in);
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auto flag = header._mask_flag;
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header._mask_flag = false;
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switch (header._opcode) {
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case WebSocketHeader::CLOSE: {
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shutdown(SockException(Err_timeout, "session timeouted"));
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}
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break;
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case WebSocketHeader::PING: {
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const_cast<WebSocketHeader&>(header)._opcode = WebSocketHeader::PONG;
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WebSocketSplitter::encode(header, (uint8_t *)_remian_data.data(), _remian_data.size());
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}
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break;
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case WebSocketHeader::CONTINUATION: {
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}
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break;
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case WebSocketHeader::TEXT:
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case WebSocketHeader::BINARY: {
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BufferString::Ptr buffer = std::make_shared<BufferString>(_remian_data);
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_session->onRecv(buffer);
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}
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break;
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default:
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break;
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}
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_remian_data.clear();
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header._mask_flag = flag;
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}
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void mediakit::WebSocketClient::onWebSocketEncodeData(const uint8_t *ptr, uint64_t len)
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{
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TcpClient::send(string((char*)ptr, len));
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}
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void mediakit::WebSocketClient::onResponseCompleted_l()
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{
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_totalBodySize = 0;
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_recvedBodySize = 0;
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onResponseCompleted();
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}
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