Problem with recv() using c++

  • Thread starter Thread starter Kevin
  • Start date Start date
K

Kevin

Hi All,

Ive been writting a program that connects to servers then sends a http
request using send and that recieves html code back.
It works most of the time however sometimes the recv command waits a too
long when there is nothing left to recieve.

some of my code is
do{
recvint = recv(sock, recvbuf, 1000, 0);
printf("\necvint %d:\n", recvint);
printf("%s\n", recvbuf);
} while( recvint > 0 );

Is there any way to stop the recv after 5 seconds? It seems to wait until
the socket is closed by the server which means that the program waited all
night because one server doesnt close connections.

If you want any more info let me know.

Thanks

Kevin
 
WsaRecv w/OVERLAPPED + (Msg)WaitForSingle(Multiple)Object(Ex) with a
timeout.

Or refactor using non-blocking ioctl and select (or WsaEventSelect or
WsaAsyncSelect)


Kevin said:
Hi All,

Ive been writting a program that connects to servers then sends a http
request using send and that recieves html code back.
It works most of the time however sometimes the recv command waits a too
long when there is nothing left to recieve.

some of my code is
do{
recvint = recv(sock, recvbuf, 1000, 0);
printf("\necvint %d:\n", recvint);
printf("%s\n", recvbuf);
} while( recvint > 0 );

Is there any way to stop the recv after 5 seconds? It seems to wait until
the socket is closed by the server which means that the program waited all
night because one server doesnt close connections.

If you want any more info let me know.

Thanks

Kevin

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Hi Ben,

Thanks for your reply.

just as you posted that reply i had just found out about

setsockopt(sock,SOL_SOCKET,SO_RCVTIMEO,(char*)&n,sizeof(int));

which seems to have fixed the problem but have not tested it properly yet.
i will try wsarecv to see how it works.

Thanks
Kevin
 
That also should work, as long as you only need a receive timeout. If you
need to timeout anything else (like connect, disconnect, etc) try with
OVERLAPPED.

Kevin said:
Hi Ben,

Thanks for your reply.

just as you posted that reply i had just found out about

setsockopt(sock,SOL_SOCKET,SO_RCVTIMEO,(char*)&n,sizeof(int));

which seems to have fixed the problem but have not tested it properly yet.
i will try wsarecv to see how it works.

Thanks
Kevin




__________ Information from ESET NOD32 Antivirus, version of virus
signature database 4512 (20091015) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com
Click to expand...

__________ Information from ESET NOD32 Antivirus, version of virus signature database 4512 (20091015) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com
 
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