Programming Forums > Application Development > C++

amon · May 6th, 2005, 7:07 AM

I had a quick search on the forum and couldn't find annother instance of this particular problem. i am new to doing cgi with c++ (i want to use some c++ libraries in my script). i have made a few shell scripts that work perfectly but i'm much of a noob with cgi.

I first started my full on programme which seemed to work perfectly going to the terminal and outpoutting to a text file which was opened with a web browser however i got this error so i copied an example from a book and got the same error.

I get the error from my server: Premature end of script headers

however when i ssh into the server and run the file directly i get the output:

(Toggle Plain Text)

Contenet-type: text/html

<HTML>
<BODY>
<H1>Hello Internet World</H1>
</BODY>
</HTML>

here is the code:

(Toggle Plain Text)

#include<iostream.h>
main()
{
	cout << "Contenet-type: text/html\n\n";
	cout << "<HTML>\n";
        cout << "<BODY>\n";
        cout << "<H1>Hello Internet World</H1>\n";
        cout << "</BODY>\n";
        cout << "</HTML>\n";
        cout << endl;
}

can someone tell me what i'm getting wrong i'm sure it is the simplest thing in the world that i'm missing (a sort of super n00b mistake).

Ooble · May 6th, 2005, 8:12 AM

For one thing, you can't spell "Content".

amon · May 6th, 2005, 10:20 AM

ok i corrected the spelling but the error prevails.

(Toggle Plain Text)

#include<iostream.h>
main()
{
	cout << "Content-type: text/html\n\n";
	cout << "<HTML>\n";
        cout << "<BODY>\n";
        cout << "<H1>Hello Internet World</H1>\n";
        cout << "</BODY>\n";
        cout << "</HTML>\n";
        cout << endl;
}

Berto · May 9th, 2005, 3:33 AM

change it to this

(Toggle Plain Text)

#include <iostream> //no .h as its c++
using namespace std; //New Line

int main()
{
	cout << "Content-type: text/html\n\n";
	cout << "<HTML>\n";
        cout << "<BODY>\n";
        cout << "<H1>Hello Internet World</H1>\n";
        cout << "</BODY>\n";
        cout << "</HTML>\n";
        cout << endl;
        return 0;
}

amon · May 9th, 2005, 6:01 AM

This is getting confusing, i made that change and the output is still the same from the server.

i have made an identical shell script which i run from the server using ssh. below is the code for each of the scripts and their outputs:

(Toggle Plain Text)

slink(282)$ more test.cpp
#include<iostream>
using namespace std;

main()
{
        cout << "Content-type: text/html\n\n";
        cout << "<HTML>\n";
        cout << "<BODY>\n";
        cout << "<H1>Hello Internet World</H1>\n";
        cout << "</BODY>\n";
        cout << "</HTML>\n";
        cout << endl;
}
//------------------------------------------------
// g++ test.cpp -o test.cgi
slink(283)$ more test2.cgi
#!/bin/bash
echo "Content-type: text/html"
echo
echo "<HTML>"
echo "<BODY>"
echo "<H1>Hello Internet World</H1>"
echo "</BODY>"
echo "</HTML>"
echo 
slink(284)$ ./test.cgi
Content-type: text/html

<HTML>
<BODY>
<H1>Hello Internet World</H1>
</BODY>
</HTML>

slink(285)$ ./test2.cgi
Content-type: text/html

<HTML>
<BODY>
<H1>Hello Internet World</H1>
</BODY>
</HTML>

The outputs i get when i access thease programmes with the webserver are confusing as both programes give the same output at the command line. the shell script works as intended but the c++ app still gives the "Premature end of script headers: test.cgi" error message

tempest · May 9th, 2005, 7:29 AM

Try adding a "Content-length" header... etc.

(Toggle Plain Text)

#include <iostream> //no .h as its c++
using namespace std; //New Line

int main()
{
        char *output;

	cout << "Content-type: text/html\n";

	strcpy(output, "<HTML>\n");
        strcat(output,  "<BODY>\n");
        strcat(output, "<H1>Hello Internet World</H1>\n");
        strcat(output, "</BODY>\n");
        strcat(output, "</HTML>\n");

        cout << "Content-length: " << strlen(output) <<  endl << endl;

        cout << output;
        cout << endl;

        return 0;
}

amon · May 11th, 2005, 6:33 AM

i'm still getting the same errors after trying the new changes. is it possible for a servers settings to block cgi written in c++ but allow shell scripts?

could the output be being sent to the wrong place?

Ooble · May 11th, 2005, 6:44 AM

There's a point - are you running a local server, or using a host?

amon · May 11th, 2005, 8:02 AM

i'm using a host, is there a way i can find out about what is and what isn't allowed?

Berto · May 11th, 2005, 8:37 AM

paid for hosting it should have it if you goto the details about the package else e-mail them

May 6th, 2005, 7:07 AM	#1
amon Newbie Join Date: May 2005 Posts: 7 Rep Power: 0	Premature end of script headers I had a quick search on the forum and couldn't find annother instance of this particular problem. i am new to doing cgi with c++ (i want to use some c++ libraries in my script). i have made a few shell scripts that work perfectly but i'm much of a noob with cgi. I first started my full on programme which seemed to work perfectly going to the terminal and outpoutting to a text file which was opened with a web browser however i got this error so i copied an example from a book and got the same error. I get the error from my server: Premature end of script headers however when i ssh into the server and run the file directly i get the output: (Toggle Plain Text) Contenet-type: text/html <HTML> <BODY> <H1>Hello Internet World</H1> </BODY> </HTML> Contenet-type: text/html <HTML> <BODY> <H1>Hello Internet World</H1> </BODY> </HTML> here is the code: (Toggle Plain Text) #include<iostream.h> main() { cout << "Contenet-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; } #include<iostream.h> main() { cout << "Contenet-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; } can someone tell me what i'm getting wrong i'm sure it is the simplest thing in the world that i'm missing (a sort of super n00b mistake).

May 6th, 2005, 8:12 AM	#2
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	For one thing, you can't spell "Content". __________________ Me :: You :: Them

May 6th, 2005, 10:20 AM	#3
amon Newbie Join Date: May 2005 Posts: 7 Rep Power: 0	ok i corrected the spelling but the error prevails. (Toggle Plain Text) #include<iostream.h> main() { cout << "Content-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; } #include<iostream.h> main() { cout << "Content-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; }

May 9th, 2005, 3:33 AM	#4
Berto Programming Guru Join Date: Aug 2004 Posts: 1,022 Rep Power: 6	change it to this (Toggle Plain Text) #include <iostream> //no .h as its c++ using namespace std; //New Line int main() { cout << "Content-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; return 0; } #include <iostream> //no .h as its c++ using namespace std; //New Line int main() { cout << "Content-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; return 0; }

May 9th, 2005, 6:01 AM	#5
amon Newbie Join Date: May 2005 Posts: 7 Rep Power: 0	This is getting confusing, i made that change and the output is still the same from the server. i have made an identical shell script which i run from the server using ssh. below is the code for each of the scripts and their outputs: (Toggle Plain Text) slink(282)$ more test.cpp #include<iostream> using namespace std; main() { cout << "Content-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; } //------------------------------------------------ // g++ test.cpp -o test.cgi slink(283)$ more test2.cgi #!/bin/bash echo "Content-type: text/html" echo echo "<HTML>" echo "<BODY>" echo "<H1>Hello Internet World</H1>" echo "</BODY>" echo "</HTML>" echo slink(284)$ ./test.cgi Content-type: text/html <HTML> <BODY> <H1>Hello Internet World</H1> </BODY> </HTML> slink(285)$ ./test2.cgi Content-type: text/html <HTML> <BODY> <H1>Hello Internet World</H1> </BODY> </HTML> slink(282)$ more test.cpp #include<iostream> using namespace std; main() { cout << "Content-type: text/html\n\n"; cout << "<HTML>\n"; cout << "<BODY>\n"; cout << "<H1>Hello Internet World</H1>\n"; cout << "</BODY>\n"; cout << "</HTML>\n"; cout << endl; } //------------------------------------------------ // g++ test.cpp -o test.cgi slink(283)$ more test2.cgi #!/bin/bash echo "Content-type: text/html" echo echo "<HTML>" echo "<BODY>" echo "<H1>Hello Internet World</H1>" echo "</BODY>" echo "</HTML>" echo slink(284)$ ./test.cgi Content-type: text/html <HTML> <BODY> <H1>Hello Internet World</H1> </BODY> </HTML> slink(285)$ ./test2.cgi Content-type: text/html <HTML> <BODY> <H1>Hello Internet World</H1> </BODY> </HTML> The outputs i get when i access thease programmes with the webserver are confusing as both programes give the same output at the command line. the shell script works as intended but the c++ app still gives the "Premature end of script headers: test.cgi" error message

May 9th, 2005, 7:29 AM	#6
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 5	Try adding a "Content-length" header... etc. (Toggle Plain Text) #include <iostream> //no .h as its c++ using namespace std; //New Line int main() { char output; cout << "Content-type: text/html\n"; strcpy(output, "<HTML>\n"); strcat(output, "<BODY>\n"); strcat(output, "<H1>Hello Internet World</H1>\n"); strcat(output, "</BODY>\n"); strcat(output, "</HTML>\n"); cout << "Content-length: " << strlen(output) << endl << endl; cout << output; cout << endl; return 0; } #include <iostream> //no .h as its c++ using namespace std; //New Line int main() { char output; cout << "Content-type: text/html\n"; strcpy(output, "<HTML>\n"); strcat(output, "<BODY>\n"); strcat(output, "<H1>Hello Internet World</H1>\n"); strcat(output, "</BODY>\n"); strcat(output, "</HTML>\n"); cout << "Content-length: " << strlen(output) << endl << endl; cout << output; cout << endl; return 0; } __________________

May 11th, 2005, 6:33 AM	#7
amon Newbie Join Date: May 2005 Posts: 7 Rep Power: 0	i'm still getting the same errors after trying the new changes. is it possible for a servers settings to block cgi written in c++ but allow shell scripts? could the output be being sent to the wrong place?

May 11th, 2005, 6:44 AM	#8
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	There's a point - are you running a local server, or using a host? __________________ Me :: You :: Them

May 11th, 2005, 8:02 AM	#9
amon Newbie Join Date: May 2005 Posts: 7 Rep Power: 0	i'm using a host, is there a way i can find out about what is and what isn't allowed?

May 11th, 2005, 8:37 AM	#10
Berto Programming Guru Join Date: Aug 2004 Posts: 1,022 Rep Power: 6	paid for hosting it should have it if you goto the details about the package else e-mail them

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