http://www.fastcgi.com/devkit/examples/echo-cpp.cpp
开发环境:freebsd or linux开发语言:c++代码:
#include <stdlib.h>
#include <string>
#include <iostream>
#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;
}
编译:
root@mypc % g++47 -o echo.fcgi echo.cpp -I /usr/local/include -L /usr/local/lib -lfcgi -lstdc++ -lfcgi++
http://127.0.0.1/echo.fcgi
输出:
Request Number: 0
Request Environment
FCGI_ROLE=RESPONDER
UNIQUE_ID=ULd5VnkKKJoAAAl0Aa0AAAAB
HTTP_HOST=127.0.0.1
HTTP_CONNECTION=close
HTTP_CACHE_CONTROL=max-age=0
HTTP_USER_AGENT=Mozilla/5.0 (X11; FreeBSD i386) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2
HTTP_ACCEPT=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
HTTP_ACCEPT_ENCODING=gzip,deflate,sdch
HTTP_ACCEPT_LANGUAGE=en-US,en;q=0.8
HTTP_ACCEPT_CHARSET=UTF-8,*;q=0.5
PATH=/sbin:/bin:/usr/sbin:/usr/bin
SERVER_SIGNATURE=
SERVER_SOFTWARE=Apache/2.2.21 (FreeBSD) mod_ssl/2.2.21 OpenSSL/0.9.8q DAV/2 mod_fcgid/2.3.6
SERVER_NAME=127.0.0.1
SERVER_ADDR=127.0.0.1
SERVER_PORT=80
REMOTE_ADDR=127.0.0.1
DOCUMENT_ROOT=/usr/www/lovely/htdocs
SERVER_ADMIN=webmaster@dummy-host.example.com
SCRIPT_FILENAME=/usr/www/lovely/htdocs/echo.fcgi
REMOTE_PORT=11449
GATEWAY_INTERFACE=CGI/1.1
SERVER_PROTOCOL=HTTP/1.1
REQUEST_METHOD=GET
QUERY_STRING=
REQUEST_URI=/echo.fcgi
SCRIPT_NAME=/echo.fcgi
Process/Initial Environment
PATH=/sbin:/bin:/usr/sbin:/usr/bin
LD_LIBRARY_PATH=/usr/local/lib:
Standard Input - 0 bytes
问题总结:
编译时要加上 -lfcgi++这个库,否则会出现: undefined reference to `fcgi_streambuf::~fcgi_streambuf()'
错误。
原文链接: https://www.cnblogs.com/martianFish/archive/2013/02/27/2935989.html
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