mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-01 00:57:28 +08:00
147 lines
4.5 KiB
C++
147 lines
4.5 KiB
C++
/*
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* MIT License
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*
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* Copyright (c) 2016-2019 xiongziliang <771730766@qq.com>
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*
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* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "HttpRequestSplitter.h"
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#include "Util/logger.h"
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#include "Util/util.h"
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using namespace toolkit;
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namespace mediakit {
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void HttpRequestSplitter::input(const char *data,uint64_t len) {
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const char *ptr = data;
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if(!_remain_data.empty()){
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_remain_data.append(data,len);
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data = ptr = _remain_data.data();
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len = _remain_data.size();
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}
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splitPacket:
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/*确保ptr最后一个字节是0，防止strstr越界
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*由于ZLToolKit确保内存最后一个字节是保留未使用字节并置0，
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*所以此处可以不用再次置0
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*但是上层数据可能来自其他渠道，保险起见还是置0
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*/
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char &tail_ref = ((char *) ptr)[len];
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char tail_tmp = tail_ref;
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tail_ref = 0;
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//数据按照请求头处理
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const char *index = nullptr;
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_remain_data_size = len;
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while (_content_len == 0 && _remain_data_size > 0 && (index = onSearchPacketTail(ptr,_remain_data_size)) != nullptr) {
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//_content_len == 0，这是请求头
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const char *header_ptr = ptr;
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int64_t header_size = index - ptr;
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ptr = index;
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_remain_data_size = len - (ptr - data);
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_content_len = onRecvHeader(header_ptr, header_size);
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}
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if(_remain_data_size <= 0){
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//没有剩余数据，清空缓存
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_remain_data.clear();
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return;
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}
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/*
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* 恢复末尾字节
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* 移动到这来，目的是防止HttpRequestSplitter::reset()导致内存失效
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*/
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tail_ref = tail_tmp;
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if(_content_len == 0){
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//尚未找到http头，缓存定位到剩余数据部分
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string str(ptr,_remain_data_size);
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_remain_data = str;
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return;
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}
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//已经找到http头了
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if(_content_len > 0){
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//数据按照固定长度content处理
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if(_remain_data_size < _content_len){
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//数据不够，缓存定位到剩余数据部分
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string str(ptr,_remain_data_size);
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_remain_data = str;
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return;
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}
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//收到content数据，并且接受content完毕
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onRecvContent(ptr,_content_len);
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_remain_data_size -= _content_len;
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ptr += _content_len;
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//content处理完毕,后面数据当做请求头处理
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_content_len = 0;
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if(_remain_data_size > 0){
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//还有数据没有处理完毕
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string str(ptr,_remain_data_size);
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_remain_data = str;
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data = ptr = (char *)_remain_data.data();
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len = _remain_data.size();
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goto splitPacket;
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}
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_remain_data.clear();
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return;
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}
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//_content_len < 0;数据按照不固定长度content处理
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onRecvContent(ptr,_remain_data_size);//消费掉所有剩余数据
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_remain_data.clear();
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}
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void HttpRequestSplitter::setContentLen(int64_t content_len) {
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_content_len = content_len;
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}
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void HttpRequestSplitter::reset() {
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_content_len = 0;
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_remain_data_size = 0;
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_remain_data.clear();
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}
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const char *HttpRequestSplitter::onSearchPacketTail(const char *data,int len) {
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auto pos = strstr(data,"\r\n\r\n");
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if(pos == nullptr){
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return nullptr;
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}
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return pos + 4;
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}
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int64_t HttpRequestSplitter::remainDataSize() {
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return _remain_data_size;
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}
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} /* namespace mediakit */
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