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/*
* A simple FastCGI application example in C++.
*
* $Id: echo-cpp.cpp,v 1.10 2002/02/25 00:46:17 robs Exp $
*
* Copyright (c) 2001 Rob Saccoccio and Chelsea Networks
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#ifdef _WIN32
#include <process.h>
#else
#include <unistd.h>
extern char ** environ;
#endif
#include "fcgio.h"
#include "fcgi_config.h" // HAVE_IOSTREAM_WITHASSIGN_STREAMBUF
using namespace std;
// Maximum number of bytes allowed to be read from stdin
static const unsigned long STDIN_MAX = 1000000;
static void penv(const char * const * envp)
{
cout << "<PRE>\n";
for ( ; *envp; ++envp)
{
cout << *envp << "\n";
}
cout << "</PRE>\n";
}
static long gstdin(FCGX_Request * request, char ** content)
{
char * clenstr = FCGX_GetParam("CONTENT_LENGTH", request->envp);
unsigned long clen = STDIN_MAX;
if (clenstr)
{
clen = strtol(clenstr, &clenstr, 10);
if (*clenstr)
{
cerr << "can't parse \"CONTENT_LENGTH="
<< FCGX_GetParam("CONTENT_LENGTH", request->envp)
<< "\"\n";
clen = STDIN_MAX;
}
// *always* put a cap on the amount of data that will be read
if (clen > STDIN_MAX) clen = STDIN_MAX;
*content = new char[clen];
cin.read(*content, clen);
clen = cin.gcount();
}
else
{
// *never* read stdin when CONTENT_LENGTH is missing or unparsable
*content = 0;
clen = 0;
}
// Chew up any remaining stdin - this shouldn't be necessary
// but is because mod_fastcgi doesn't handle it correctly.
// ignore() doesn't set the eof bit in some versions of glibc++
// so use gcount() instead of eof()...
do cin.ignore(1024); while (cin.gcount() == 1024);
return clen;
}
int main (void)
{
int count = 0;
long pid = getpid();
streambuf * cin_streambuf = cin.rdbuf();
streambuf * cout_streambuf = cout.rdbuf();
streambuf * cerr_streambuf = cerr.rdbuf();
FCGX_Request request;
FCGX_Init();
FCGX_InitRequest(&request, 0, 0);
while (FCGX_Accept_r(&request) == 0)
{
// Note that the default bufsize (0) will cause the use of iostream
// methods that require positioning (such as peek(), seek(),
// unget() and putback()) to fail (in favour of more efficient IO).
fcgi_streambuf cin_fcgi_streambuf(request.in);
fcgi_streambuf cout_fcgi_streambuf(request.out);
fcgi_streambuf cerr_fcgi_streambuf(request.err);
#if HAVE_IOSTREAM_WITHASSIGN_STREAMBUF
cin = &cin_fcgi_streambuf;
cout = &cout_fcgi_streambuf;
cerr = &cerr_fcgi_streambuf;
#else
cin.rdbuf(&cin_fcgi_streambuf);
cout.rdbuf(&cout_fcgi_streambuf);
cerr.rdbuf(&cerr_fcgi_streambuf);
#endif
// Although FastCGI supports writing before reading,
// many http clients (browsers) don't support it (so
// the connection deadlocks until a timeout expires!).
char * content;
unsigned long clen = gstdin(&request, &content);
cout << "Content-type: text/html\r\n"
"\r\n"
"<TITLE>echo-cpp</TITLE>\n"
"<H1>echo-cpp</H1>\n"
"<H4>PID: " << pid << "</H4>\n"
"<H4>Request Number: " << ++count << "</H4>\n";
cout << "<H4>Request Environment</H4>\n";
penv(request.envp);
cout << "<H4>Process/Initial Environment</H4>\n";
penv(environ);
cout << "<H4>Standard Input - " << clen;
if (clen == STDIN_MAX) cout << " (STDIN_MAX)";
cout << " bytes</H4>\n";
if (clen) cout.write(content, clen);
if (content) delete []content;
// If the output streambufs had non-zero bufsizes and
// were constructed outside of the accept loop (i.e.
// their destructor won't be called here), they would
// have to be flushed here.
}
#if HAVE_IOSTREAM_WITHASSIGN_STREAMBUF
cin = cin_streambuf;
cout = cout_streambuf;
cerr = cerr_streambuf;
#else
cin.rdbuf(cin_streambuf);
cout.rdbuf(cout_streambuf);
cerr.rdbuf(cerr_streambuf);
#endif
return 0;
}
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