int HttpRequest::Request(const void* data,int len,Memory<char>& html,String* retHead){
if(!hRequest) return -1;
if(!::HttpSendRequest(hRequest,NULL,0,(LPVOID)data,len)) return -1;
DWORD dwSize = 0;
if(retHead){
HttpQueryInfo(hRequest,HTTP_QUERY_RAW_HEADERS_CRLF, NULL, &dwSize, NULL);
if(dwSize!=0){
retHead->SetCubage(dwSize/2);
if(HttpQueryInfo(hRequest, HTTP_QUERY_RAW_HEADERS_CRLF, (LPVOID)retHead->Handle(), &dwSize, NULL)){
//安全起见，实际上数据已经是一个NULL结尾的字串。
(*retHead)[dwSize/2-1] = 0;
retHead->Realize();
}
}
}
int offset = 0;
for(;;){
char szData[1024];
DWORD dwByteRead = 0;
::InternetReadFile(hRequest,szData,sizeof(szData),&dwByteRead);
if(!dwByteRead) break;
if(html.Length()<dwByteRead+offset+1){
if(!html.SetLength(dwByteRead+offset+1)){
Print(L"html alloc failed");
break;
}
}
html.CopyFrom(szData,dwByteRead,offset);
offset += dwByteRead;
}
if(offset!=0) html[offset] = 0;
::InternetCloseHandle(hConnect);
hConnect = 0;
::InternetCloseHandle(hRequest);
hRequest = 0;
return offset;
}
