ISAPI之Http返回不同的数据类型

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在写ISAPI程序时，不同的情况可能需要返回不容的数据类型，例如有的http响应需要文本，有的可以是二进制更省流量，有的需要另存为某种文件，示例代码如下。

1返回文本，可以直接以网页的形式打开

DWORD ReturnText(LPEXTENSION_CONTROL_BLOCK pECB,const vector<char>& vecBody) { char HeaderBuff[300]; DWORD dwBodySize = (DWORD)vecBody.size(); DWORD dwHeaderSize = (DWORD)sprintf_s(HeaderBuff, "Content-Type: text/plain\r\n" "Charset: utf-8\r\n" "Cache-Control: no-store\r\n" "Content-Length: %d\r\n\r\n", dwBodySize); if(!pECB->ServerSupportFunction(pECB->ConnID,HSE_REQ_SEND_RESPONSE_HEADER,NULL,&dwHeaderSize,(LPDWORD)HeaderBuff))  { return HSE_STATUS_ERROR; }  if (dwBodySize > 0) { if(!pECB->WriteClient(pECB->ConnID,(LPVOID)&vecBody[0],&dwBodySize,0))  { return HSE_STATUS_ERROR; } } return HSE_STATUS_SUCCESS; }

2返回某种文件格式的数据流，弹出保存文件窗口，可设置一个文件名称

DWORD ReturnCSV(LPEXTENSION_CONTROL_BLOCK pECB,const vector<byte>& vecBody, const string& strFileName) { char HeaderBuff[300]; DWORD dwBodySize = (DWORD)vecBody.size(); DWORD dwHeaderSize = (DWORD)sprintf_s(HeaderBuff, "Content-Type: application/vnd.ms-excel\r\n" "Content-Disposition:filename=%s.csv\r\n" "Charset: GB2312\r\n" "Cache-Control: no-store\r\n" "Content-Length: %d\r\n\r\n", strFileName.c_str(), dwBodySize); if(!pECB->ServerSupportFunction(pECB->ConnID,HSE_REQ_SEND_RESPONSE_HEADER,NULL,&dwHeaderSize,(LPDWORD)HeaderBuff))  { return HSE_STATUS_ERROR; }  if (dwBodySize > 0) { if(!pECB->WriteClient(pECB->ConnID,(LPVOID)&vecBody[0],&dwBodySize,0))  { return HSE_STATUS_ERROR; } } return HSE_STATUS_SUCCESS; }

3二进制，更省流量

DWORD ReturnBinary(LPEXTENSION_CONTROL_BLOCK pECB,const vector<byte>& vecBody) { char HeaderBuff[300]; DWORD dwBodySize = (DWORD)vecBody.size(); DWORD dwHeaderSize = (DWORD)sprintf_s(HeaderBuff, "Cache-Control: no-store\r\n" "Content-Type: application/octet-stream\r\n" "Content-Length: %d\r\n\r\n", dwBodySize); if(!pECB->ServerSupportFunction(pECB->ConnID, HSE_REQ_SEND_RESPONSE_HEADER,NULL,&dwHeaderSize,(LPDWORD)HeaderBuff))  { return HSE_STATUS_ERROR; }  if (dwBodySize > 0) { if(!pECB->WriteClient(pECB->ConnID,(LPVOID)&vecBody[0],&dwBodySize,0)) { return HSE_STATUS_ERROR; } } return HSE_STATUS_SUCCESS; }