77 lines
3.7 KiB
C++
77 lines
3.7 KiB
C++
#ifndef HGL_NETWORK_HTTP_INPUT_STREAM_INCLUDE
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#define HGL_NETWORK_HTTP_INPUT_STREAM_INCLUDE
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#include<hgl/io/InputStream.h>
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#include<hgl/util/plist/PAttrib.h>
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#include<hgl/network/IP.h>
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namespace hgl
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{
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namespace network
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{
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using namespace io;
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class TCPClient;
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/**
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* HTTPInputStream流是一个针对HTTP服务器的流式访问类，用它可以从HTTP服务器上下载文件，它从InputStream类派生。<br>
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* 需要注意的是，这个类只能读，不能写。Position和Size也只能读不能修改<br>
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*/
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class HTTPInputStream:public io::InputStream ///HTTP流式访问类
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{
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TCPClient *tcp;
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InputStream *tcp_is;
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private:
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char *http_header;
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uint http_header_size;
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void ParseHttpResponse();
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int PraseHttpHeader();
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int ReturnError();
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protected:
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int64 pos;
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int64 filelength;
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uint response_code; //HTTP响应代码
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UTF8String response_info; //HTTP响应信息
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UTF8PAttribSet response_list; //响应信息
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public:
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HTTPInputStream();
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~HTTPInputStream();
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bool Open(IPAddress *,const UTF8String &,const UTF8String &); ///<打开一个网址
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void Close() override; ///<
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uint GetResponseCode()const{return response_code;} ///<返回HTTP响应代码
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const UTF8String & GetResponseInfo()const{return response_info;} ///<返回HTTP响应信息
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const UTF8PAttribSet & GetResponseList()const{return response_list;} ///<返回HTTP响应信息列表
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int64 Read(void *,int64) override; ///<读取数据
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int64 Peek(void *,int64) override{return 0;} ///<预览数据
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int64 ReadFully(void *buf,int64 buf_size)override{return Read(buf,buf_size);} ///<充分读取,保证读取到指定长度的数据(不计算超时)
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bool CanRestart()const override{return false;} ///<是否可以复位
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bool CanSeek()const override{return false;} ///<是否可以定位
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bool CanSize()const override{return false;} ///<是否可以取得尺寸
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bool CanPeek()const override{return false;} ///<是否可以预览数据
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bool Restart() override{return false;} ///<复位访问指针
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int64 Skip(int64) override{return 0;} ///<跳过指定字节不访问
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int64 Seek(int64,SeekOrigin so=SeekOrigin::Begin) override {return false;} ///<移动访问指针
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int64 Tell()const override{return pos;} ///<返回当前访问位置
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int64 GetSize()const override{return filelength;} ///<取得流长度
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int64 Available()const override{return filelength-pos;} ///<剩下的可以不受阻塞访问的字节数
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};//class HTTPInputStream
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}//namespace network
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using namespace network;
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}//namespace hgl
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#endif//HGL_NETWORK_HTTP_INPUT_STREAM_INCLUDE
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