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• 01-10-2008, 5:32 PM

  monoid Joined on 01-10-2008, 9:54 PM Posts 4 monoid

  IIS unable to read Stream include CR LF with STDIN (C/C++) Reply Contact I have developed a Webservice in C++, which receive streams from STDIN via POST and saves it to a file. If there is no CR LF in the stream, IIS read the stream from stdin perfectly on IIS webserver. But if there is a CR LF inside the stream, the following code example hang on. On Apache Webserver it works always good. int main(void) { size_t readbytes; long content_length = 0; content_length = atol(getenv("CONTENT_LENGTH")); char * tmp = NULL; tmp = (char*)malloc(1); tmp[0]='\0'; tmp = (char*)realloc(tmp,content_length + 1); readbytes = fread(tmp,1,content_length,stdin); readbytes[content_length]='\0'; return 0; } Does anyone have an idea, that it will not work with a stream including CR LF on IIS?` Thank you for your help!

  Tags: FastCGIIISFastCGI IIS Applicationiis 6content typeheadersfastCGI custom

• 01-14-2008, 1:40 PM

  In reply to

  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 988 anilr

  Re: IIS unable to read Stream include CR LF with STDIN (C/C++) Reply Contact You probably need to call _setmode(_fileno(stdin), _O_BINARY) - otherwise the crt routine will convert CRLF to just LF and then you have less than Content-Length bytes available, so the read would never complete. Also, unless you need to maintain this code for non-windows systems, I would use win32 APIs rather than crt APIs for system type stuff like this - the crt APIs on windows have lot of quirks which are not fun when you come across them. Anil Ruia Senior Software Design Engineer IIS Core Server

• 03-19-2008, 6:55 AM

  In reply to

  monoid Joined on 01-10-2008, 9:54 PM Posts 4 monoid

  Re: IIS unable to read Stream include CR LF with STDIN (C/C++) Reply Contact Hi, thanks for you answer. I hava found a article by Microsoft:   http://support.microsoft.com/kb/203298/en-us  But the article isnt ok. It should be a solution for the CRLF Problem on IIS. This should be the solution:   int main(int argc, char* argv[])    {       char*   pCL = getenv("CONTENT_LENGTH");       if(pCL != NULL)       {          int   nCL = atoi(pCL);          if(nCL > 0)          {             // WARNING:  Error checking removed for clarity...             printf("Content-Type: text/html\r\n\r\n");             _setmode( _fileno( stdin ), _O_BINARY );               char* szBuf = new char[nCL + 1];             fread(szBuf + nRead, sizeof(char), nCL-nRead, stdin);             szBuf[nCL] = '\0';             // Do something with szBuf...             delete [] szBuf;          }       }       return 0;    }   But what is "nRead"? I hope, somebody could help me! Its very urgent.

• 03-19-2008, 12:45 PM

  In reply to

  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 988 anilr	Re: IIS unable to read Stream include CR LF with STDIN (C/C++) Reply Contact What the sample is missing is that you have to call fread in a loop until nCL bytes have been read (since fread can return before reading all the bytes) - the return value of fread will give you number of bytes read so far - which is what nRead is supposed to be. Anil Ruia Senior Software Design Engineer IIS Core Server