I comliled C++ project for FastCGI, copy executable file into www directory, open via browser - and got 500 error (timeout exeption). What do i wrong?
OS Ubuntu 10.05, server: Apache
source C++ code:
#include <fcgi_stdio.h> /* fcgi library; put it first*/
#include <fcgiapp.h>
#include <cstdlib>
#include <iostream>
using namespace std;
int count;
int main(int argc, char** argv) {
/* Response loop. */
while (FCGI_Accept() >= 0) {
cout<<"Content-type: text/html\r\n"
"\r\n"
"<title>FastCGI Hello! (C, fcgi_stdio library)</title>"
"<h1>FastCGI Hello! (C, fcgi_stdio library)</h1>"
"Request number %d running on host <i>%s</i>\n";
}
return 0;
}
When you're in the FCGI_Accept() loop you should be reading data, not writing it.
Check out http://www.fastcgi.com/devkit/doc/fastcgi-prog-guide/apaman.htm
Related
I have installed the Poco C++ library (Release 1.12.4) with vcpkg on my computer and I'm trying to send a simple Mail by using the sample delivered on the Github Page.`The script is compile with Visual Studio 17.
The full code:
#include "Poco/Net/MailMessage.h"
#include "Poco/Net/MailRecipient.h"
#include "Poco/Net/SecureSMTPClientSession.h"
#include "Poco/Net/StringPartSource.h"
#include "Poco/Net/SSLManager.h"
#include "Poco/Net/ConsoleCertificateHandler.h"
#include "Poco/Net/PrivateKeyPassphraseHandler.h"
#include "Poco/SharedPtr.h"
#include "Poco/Path.h"
#include "Poco/Exception.h"
#include <iostream>
using Poco::Net::MailMessage;
using Poco::Net::MailRecipient;
using Poco::Net::SMTPClientSession;
using Poco::Net::SecureSMTPClientSession;
using Poco::Net::StringPartSource;
using Poco::Net::SSLManager;
using Poco::Net::Context;
using Poco::Net::InvalidCertificateHandler;
using Poco::Net::ConsoleCertificateHandler;
using Poco::SharedPtr;
using Poco::Path;
using Poco::Exception;
using Poco::UInt16;
using namespace std;
class SSLInitializer
{
public:
SSLInitializer()
{
Poco::Net::initializeSSL();
}
~SSLInitializer()
{
Poco::Net::uninitializeSSL();
}
};
int main()
{
SSLInitializer sslInitializer;
std::string mailhost("smtp.office365.com");
std::string recipient("recipient#gmail.com");
std::string username("MyMail#gmail.com");
std::string password("MyPassword");
Poco:UInt16 port = 587;
try
{
// Note: we must create the passphrase handler prior Context
SharedPtr<InvalidCertificateHandler> pCert = new ConsoleCertificateHandler(false); // ask the user via console
Context::Ptr pContext = new Context(Context::CLIENT_USE, "");
SSLManager::instance().initializeClient(0, pCert, pContext);
MailMessage message;
message.addRecipient(MailRecipient(MailRecipient::PRIMARY_RECIPIENT, recipient));
message.setSubject("Hello from the POCO C++ Libraries");
std::string content;
content += "Hello ";
content += recipient;
content += ",\r\n\r\n";
content += "This is a greeting from the POCO C++ Libraries.\r\n\r\n";
message.addContent(new StringPartSource(content));
SecureSMTPClientSession session(mailhost, port);
session.login();
session.startTLS(pContext);
if (!username.empty())
{
session.login(SMTPClientSession::AUTH_LOGIN, username, password);
}
session.sendMessage(message);
session.close();
}
catch (Exception& exc)
{
std::cerr << exc.displayText() << std::endl;
return 1;
}
return 0;
}
I already tried the code on my first computer and it works. I wanted to try it on my laptop but it raises following error:
Poco::Net::NoCertificateException
and after a while:
SSL Exception: Error during handshake: failed to read data
I located the error and it comes from this line:
session.startTLS(pContext);
Thank you for helping me!
P.S: I don't use OpenSSL but NetSSL_Win, an implementation of the POCO NetSSL library based on Windows Schannel.
I use chdir() to switch the directory, and then use execvp() to execute "java Main". I'm sure there is Main.class, but something went wrong. I want to know why.
#include <cstdio>
#include <unistd.h>
using namespace std;
int main(){
char buf[80];
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
chdir("/home/keane/Judge/temp");
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
char *array[3];
array[0] = "java";
array[1] = "Main";
array[2] = NULL;
execvp("java", array);
return 0;
}
the error is could not find the main class , and I can run java Main in that directory.
What drives me crazy is that I can't use system("java Main"), and the error is that Error: Could not find or load main class Main, and it's just like this on my computer
update:
#include <unistd.h>
#include <cstdlib>
int main(){
chdir("/home/keane/Judge/temp");
system("pwd");
system("ls");
system("java Main");
return 0;
}
the output on console is:
/home/keane/Judge/temp
1.out 3.out 5.out Main.class stdout_spj.txt
2.out 4.out ce.txt Main.java
Error: Could not find or load the main class Main
my final solution is to reboot the computer and add -cp . to the java command.
althought I don't why is necessary.
thanks everyone!
This works as intended on my system, maybe you need to add -cp . to your java call.
EDIT: to elaborate: -cp (for classpath) tells java where to look for user provided .class files. This does not necessarily include the current working directory by default.
The execution of execvp() is non-blocking and takes ownership of the caller, that means that when it starts if the program ends too quickly you will never be able to see the result, to solve this I use fork(). The wait is just to avoid using sleep as I used at the begining. Its all in c.
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/wait.h>
int main(int argc, char** argv){
char buf[80];
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
chdir("/home/");
getcwd(buf,sizeof(buf));
printf("current working directory: %s\n", buf);
char *array[3] = {"java", "Main", NULL};
if(fork() == 0) {
if(execvp("java", array) < 0) {
fprintf(stderr, "Error spawning command: %s\n", strerror(errno));
}
} else {
printf("Command spawned\n");
wait(NULL); // Wait to the forked process to end (avoid using sleep)
}
return 0;
}
I want to write a C++ program to get associated applications which are suitable to open specified file. I find the LSCopyApplicationURLsForURL API, and create a command line C++ application by XCode.
But after running this program, I always get segment fault. XCode shows EXEC_BAD_ACCESS(code=1, address....) error.
I also tryied running it from sudo, but the same result. What is the problem?
The code:
#include <iostream>
#include <objc/objc.h>
#include <objc/objc-runtime.h>
#include <CoreFoundation/CoreFoundation.h>
#include <CoreServices/CoreServices.h>
using namespace std;
int main(int argc, const char * argv[]) {
auto url = CFURLRef("file:///Users/efan/src/a.cpp");
auto ret = LSCopyApplicationURLsForURL(url, kLSRolesAll);
cout << ret << endl;
return 0;
}
Try creating your CFURLRef using one of the proper CFURLCreate* methods. See "Creating a CFURL" here.
For example:
auto tempStringURL = CFStringCreateWithCString(nullptr, "/Users/efan/src/a.cpp", kCFStringEncodingUTF8);
auto url = CFURLCreateWithFileSystemPath(nullptr, tempStringURL, kCFURLPOSIXPathStyle, FALSE);
auto ret = LSCopyApplicationURLsForURL(url, kLSRolesAll);
You need to Release the "Created" variables to clean up memory.
I am trying to implement a basic client-server program using ACE, but the problem is that if I send from client and receive it from server, it works properly. But, when I am increasing the complexity i.e., multiple sends and recvs the programs isn't working. Any help is appreciated.
Here's the client code.
#include "ace/SOCK_Acceptor.h"
#include "ace/SOCK_Connector.h"
#include "ace/SOCK_Stream.h"
#include "iostream"
using namespace std;
int main(){
ACE_INET_Addr server(7128);
ACE_SOCK_Connector cli;
ACE_SOCK_Stream cstream;
if(cli.connect(cstream, server)==-1){perror("Error");}
char buff[100];
if(-1==cstream.recv_n(buff, 7)){printf("Error");}
cout<<buff<<endl;
cstream.send_n("FU", 3);
}
Here's the server code
#include "ace/SOCK_Acceptor.h"
#include "ace/SOCK_Connector.h"
#include "ace/SOCK_Stream.h"
#include "iostream"
using namespace std;
int main(){
ACE_INET_Addr server(7128);
ACE_INET_Addr client;
ACE_SOCK_Acceptor cli(server);
ACE_SOCK_Stream cstream;
if(cli.accept(cstream, &client)==-1){perror("Error");}
char buff[100];
if(-1==cstream.send_n("RAND", 5)){printf("Error");}
cstream.recv_n(buff, 3);
}
Your server is sending 5 bytes but your client is expecting to read 7. The client is blocked waiting for 2 more bytes that will never come.
I'm trying to do something very simple, I just want to print my native language, pt-br in Windows Console.
IDE Creator
I created a new project->other->Qt Console Application the I put it in my main.cpp file:
#include <QCoreApplication>
#include <QDebug>
#include <QTextCodec>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
qDebug() << "aeiou áéíóú";
std::cout << "aeiou áéíóú" << endl;
return 0;
}
here is what I got:
C:\Users\maiko.costa\testeQtConsole\debug>testeQtConsole.exe
aeiou ßÚݾ·
aeiou ßÚݾ·
C:\Users\maiko.costa\testeQtConsole\debug>
I've tried it too, but with the same previous output:
#include <QCoreApplication>
#include <QDebug>
#include <QTextCodec>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QTextCodec *codec = QTextCodec::codecForName("CP1252");
QTextCodec::setCodecForCStrings(codec);
qDebug() << "aeiou áéíóú";
std::cout << "aeiou áéíóú" << endl;
return 0;
}
The System encode for Windows 7 is it right ?
what am I missing ?
I am not that familiar with QT but I think this can help you just as well. The Windows console uses the OEM char set. Therefore, in order to properly print characters on std::cout they need to be encoded using OEM. This can be accomplished using the Windows API CharToOem.
Small example, just so you get the idea (here input is assumed to be UTF16):
void oemPrint(const wchar_t* str) {
char* chars = (char*)alloca(strlen(str)+1);
CharToOemW(str, chars);
fputs(chars, stdout);
}
// Usage:
oemPrint(L"aeiou áéíóú");
EDIT: A QT solution might be to use QTextCodec::codecForName("IBM 850") - this is the OEM codec.
I find the solution in this thread. Output unicode strings in Windows console app
If I ran chcp 65001 in windows console before I ran my app the characters are printed correctly.
I don't know how to workaround it in my source code, then I call this program manually with the start cpp function.
Here is the return line of function I wrote that displays passwords as ● ● ● ● ●
return QString::fromUtf8( "\u25CF \u25CF \u25CF \u25CF \u25CF" );
QString::fromUnicode should work the same.
Maybe something like:
QString x = QString::fromUtf8( "\u25CF \u25CF \u25CF \u25CF \u25CF" );
std::cout << qPrintable(x) << std::endl;
Of course change it to QString::fromUnicode... hope this helps
QString a="aeiou áéíóú";
std::cout<< a.toStdString().data();