Run on Windows 7 32-bit system client computer to send a Http request error

 bRet=HttpSendRequest (m_hRequest, strHeader c_str (), dwHeaderSize, (LPVOID) strPostData. C_str (), dwSize); 
if (! BRet) 
{
Cstrings strT. 
StrT. The Format (" data sent failure, error code: % d ", GetLastError ()); 
MessageBox (strT); 
return; 
} 

Some client computer (such as xp) can run, but a few customer computer failure, the error code is 2, can not find a file!
Strives for the great god, give directions, where is the system library or network Settings related problem less!

CodePudding user response:

Refer to the MSDN examples

 
//the Open Internet session. 
HINTERNET hSession=: : InternetOpen (" MSDN SurfBear ", 
PRE_CONFIG_INTERNET_ACCESS, 
NULL, 
INTERNET_INVALID_PORT_NUMBER, 
0); 

//Connect to www.microsoft.com. 
HINTERNET hConnect=: : InternetConnect (hSession, 
"Www.microsoft.com", 
INTERNET_INVALID_PORT_NUMBER, 
", "
", "
INTERNET_SERVICE_HTTP, 
0, 
0); 

//Request the file/MSDN/MSDNINFO/from the server. 
HINTERNET hHttpFile=: : HttpOpenRequest (hConnect, 
"GET", 
"/MSDN/MSDNINFO/," 
HTTP_VERSION, 
NULL, 
0, 
INTERNET_FLAG_DONT_CACHE, 
0); 

//Send the request. 
BOOL bSendRequest=: : HttpSendRequest (hHttpFile, NULL, 0, 0, 0). 

//Get the length of the file. 
Char bufQuery [32]. 
DWORD dwLengthBufQuery=sizeof (bufQuery); 
BOOL bQuery=: : HttpQueryInfo (hHttpFile, 
HTTP_QUERY_CONTENT_LENGTH, 
BufQuery, 
& DwLengthBufQuery); 

//the Convert length from ASCII string to a DWORD. 
DWORD dwFileSize=(DWORD) atol (bufQuery); 

//the Allocate a buffer for the file. 
Char * buffer=new char [dwFileSize + 1]; 

//Read the file into the buffer. 
DWORD dwBytesRead; 
BOOL bRead=: : InternetReadFile (hHttpFile, 
Buffer, 
DwFileSize + 1, 
& DwBytesRead); 
//Put a zero on the end of the buffer. 
Buffer [dwBytesRead]=0; 

//Close all of the Internet handles. 
: : InternetCloseHandle (hHttpFile); 
: : InternetCloseHandle (hConnect); 
: : InternetCloseHandle (hSession); 

//Display the file in an edit control. 
PEditCtrl - & gt; SetWindowText (buffer); 

CodePudding user response:

Back upstairs, @ zgl7903
In accordance with your MSDN examples, in the client computer is running to HttpSendRequest failed, GetLastError error code is 2

CodePudding user response:

Run the command line under the reset winsock try

Netsh winsock reset

CodePudding user response:

@ zgl7903
Netsh winsock reset this way not line!
Key customers on a computer using Delphi program can perform Http communication

CodePudding user response:

Whether VC related library environment has a problem, your runtime library VC program together with you also

CodePudding user response:

Relations with the environment, xp32 bit, Windows 7 64 - bit libraries have to do the difference, this have any effect

CodePudding user response:

Grab a package, each in caught tool than it and see what's the difference?