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#pragma once
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#include <iostream>
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#include <windows.h>
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#include <wininet.h>
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#include <map>
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#include <functional>
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using namespace std;
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//每次读取的字节数
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#define READ_BUFFER_SIZE 4096
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enum HttpInterfaceError
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{
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Hir_Success = 0, //成功
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Hir_InitErr, //初始化失败
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Hir_ConnectErr, //连接HTTP服务器失败
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Hir_SendErr, //发送请求失败
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Hir_QueryErr, //查询HTTP请求头失败
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Hir_404, //页面不存在
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Hir_IllegalUrl, //无效的URL
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Hir_CreateFileErr, //创建文件失败
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Hir_DownloadErr, //下载失败
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Hir_QueryIPErr, //获取域名对应的地址失败
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Hir_SocketErr, //套接字错误
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Hir_UserCancel, //用户取消下载
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Hir_BufferErr, //文件太大，缓冲区不足
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Hir_HeaderErr, //HTTP请求头错误
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Hir_ParamErr, //参数错误，空指针，空字符
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Hir_UnknowErr,
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};
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enum HttpRequest
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{
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Hr_Get,
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Hr_Post
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};
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class CWininetHttp
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{
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public:
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//单例模式
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static CWininetHttp& getInstance()
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{
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static CWininetHttp m_winHttp;
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return m_winHttp;
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}
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CWininetHttp(const CWininetHttp&) = delete;
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CWininetHttp& operator =(const CWininetHttp&) = delete;
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~CWininetHttp(void);
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//同步获取http请求
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string synRequestInfo(const string& lpUrl, HttpRequest type, map<string, string> param = map<string, string>());
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//异步获取http请求
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void asynRequestInfo(const string& lpUrl, HttpRequest type, map<string, string> param, std::function<void(string)> callBack);
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private:
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CWininetHttp(void);
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// 通过HTTP请求：Get或Post方式获取JSON信息 [3/14/2017/shike]
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const std::string RequestJsonInfo(const std::string& strUrl,
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HttpRequest type = Hr_Get,
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std::string lpHeader = "",
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std::string lpPostData = "");
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string getUrl(const string& lpUrl, map<string, string> param);
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void asynRequestThread(string totalUrl, HttpRequest type);
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// 关闭句柄
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void Release();
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// 释放句柄
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void ReleaseHandle(HINTERNET& hInternet);
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// 解析URL地址
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void ParseURLWeb(std::string strUrl, std::string& strHostName, std::string& strPageName, WORD& sPort);
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// UTF-8转为GBK2312
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char* UtfToGbk(const char* utf8);
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private:
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HINTERNET m_hSession;
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HINTERNET m_hConnect;
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HINTERNET m_hRequest;
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HttpInterfaceError m_error;
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std::function<void(string)> callBack = NULL;
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};
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