recv data into file

OK I want directly store the data I get from a recv command into a file, without posting the data firstly into the char buf, because if I received a binary file over recv it stops at some points in the binary file.
Any ideas? Thanks for help.

Code:

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                char buf[4096];
        FILE * pFile;
        pFile = fopen ("download.txt" , "wb");

here comes some code to open the connection.

        while ( (tlen=recv( h, buf, sizeof(buf), 0 )) > 0 ) {
                fputs (buf , pFile);
        }

fclose (pFile);

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Don't use string functions like fputs with what you get from a recv call. There is no guantee that it willl be null terminated (as pointed out in this thread) and this may well be the source of your problem when recieving a binary file.

Use fwrite, and use the number of bytes returned by recv() as the amount of bytes to write to the file. Loop untill you get a 0 or -1(error).

Quote:

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Originally Posted by Quantum1024

Don't use string functions like fputs with what you get from a recv call. There is no guantee that it willl be null terminated (as pointed out in this thread) and this may well be the source of your problem when recieving a binary file.

Use fwrite, and use the number of bytes returned by recv() as the amount of bytes to write to the file. Loop untill you get a 0 or -1(error).

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Now I have it that way:
It works but only until j reaches the size of buf, here 4096, how can I make the buf char as big as the file I recive?

Code:

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                  unsigned int j = 0;
                do {
                        if (recv(h,&buf[j],1,0)==SOCKET_ERROR) {
                                addlog("retlinehttp(): recv() Failed! %d", WSAGetLastError());
                                return -2;
                        }
                        fwrite (&buf[j] , 1 , 1 , file);
                        j++;
                } while (j < sizeof(buf));

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allocate the buffer using new. When j reaches the end of the buffer allocate another, bigger buffer and coppy the contents then delete the old one.