http客户端支持Transfer-Encoding: chunked

src/Http/HttpChunkedSplitter.cpp

+//
+// Created by xzl on 2018/11/13.
+//
+
+#include "HttpChunkedSplitter.h"
+
+namespace mediakit{
+    
+const char *HttpChunkedSplitter::onSearchPacketTail(const char *data, int len) {
+    auto pos = strstr(data,"\r\n");
+    if(!pos){
+        return nullptr;
+    }
+    return pos + 2;
+}
+
+void HttpChunkedSplitter::onRecvContent(const char *data, uint64_t len) {
+    onRecvChunk(data,len - 2);
+}
+
+int64_t HttpChunkedSplitter::onRecvHeader(const char *data, uint64_t len) {
+    string str(data,len - 2);
+    int ret;
+    sscanf(str.data(),"%X",&ret);
+    return ret + 2;
+}
+
+}//namespace mediakit
\ No newline at end of file

src/Http/HttpChunkedSplitter.h

+/*
+ * MIT License
+ *
+ * Copyright (c) 2016 xiongziliang <771730766@qq.com>
+ *
+ * This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ZLMEDIAKIT_HTTPCHUNKEDSPLITTER_H
+#define ZLMEDIAKIT_HTTPCHUNKEDSPLITTER_H
+
+#include <functional>
+#include "HttpRequestSplitter.h"
+
+namespace mediakit{
+
+class HttpChunkedSplitter : public HttpRequestSplitter {
+public:
+    /**
+     * len == 0时代表结束
+     */
+    typedef std::function<void (const char *data,uint64_t len)> onChunkData;
+
+    HttpChunkedSplitter(const onChunkData &cb){
+        _onChunkData = cb;
+    };
+    ~HttpChunkedSplitter() override {} ;
+protected:
+    int64_t onRecvHeader(const char *data,uint64_t len) override;
+    void onRecvContent(const char *data,uint64_t len) override;
+    const char *onSearchPacketTail(const char *data,int len) override;
+protected:
+    virtual void onRecvChunk(const char *data,uint64_t len){
+        if(_onChunkData){
+            _onChunkData(data,len);
+        }
+    };
+private:
+    onChunkData _onChunkData;
+};
+
+}//namespace mediakit
+#endif //ZLMEDIAKIT_HTTPCHUNKEDSPLITTER_H

src/Http/HttpClient.cpp

@@ -117,6 +117,7 @@ void HttpClient::onConnect(const SockException &ex) {
     _totalBodySize = 0;
     _recvedBodySize = 0;
     HttpRequestSplitter::reset();
+    _chunkedSplitter.reset();
 
     _StrPrinter printer;
     printer << _method + " " << _path + " HTTP/1.1\r\n";
@@ -156,6 +157,20 @@ int64_t HttpClient::onRecvHeader(const char *data, uint64_t len) {
         _totalBodySize = atoll(_parser["Content-Length"].data());
     }
 
+    if(_parser["Transfer-Encoding"] == "chunked"){
+        //如果Transfer-Encoding字段等于chunked，则认为后续的content是不限制长度的
+        _totalBodySize = -1;
+        _chunkedSplitter = std::make_shared<HttpChunkedSplitter>([this](const char *data,uint64_t len){
+            if(len > 0){
+                auto recvedBodySize = _recvedBodySize + len;
+                onResponseBody(data, len, recvedBodySize, INT64_MAX);
+                _recvedBodySize = recvedBodySize;
+            }else{
+                onResponseCompleted_l();
+            }
+        });
+    }
+
     if(_totalBodySize == 0){
         //后续没content，本次http请求结束
         onResponseCompleted_l();
@@ -171,6 +186,10 @@ int64_t HttpClient::onRecvHeader(const char *data, uint64_t len) {
 }
 
 void HttpClient::onRecvContent(const char *data, uint64_t len) {
+    if(_chunkedSplitter){
+        _chunkedSplitter->input(data,len);
+        return;
+    }
     auto recvedBodySize = _recvedBodySize + len;
     if(_totalBodySize < 0){
         //不限长度的content,最大支持INT64_MAX个字节
@@ -231,7 +250,6 @@ void HttpClient::onManager() {
 void HttpClient::onResponseCompleted_l() {
     _totalBodySize = 0;
     _recvedBodySize = 0;
-    HttpRequestSplitter::reset();
     onResponseCompleted();
 }
 

src/Http/HttpClient.h

@@ -36,6 +36,7 @@
 #include "Network/TcpClient.h"
 #include "HttpRequestSplitter.h"
 #include "HttpCookie.h"
+#include "HttpChunkedSplitter.h"
 
 using namespace std;
 using namespace toolkit;
@@ -314,6 +315,7 @@ private:
     string _lastHost;
     Ticker _aliveTicker;
     float _fTimeOutSec = 0;
+    std::shared_ptr<HttpChunkedSplitter> _chunkedSplitter;
 };
 
 } /* namespace mediakit */