Web Examples

To help users to master CGI programs, a demo web site is built under "/demo" directory of the device's web root. The CGI program cgidemo, together with demo html pages, demonstrate basic functions of CGI:

Demo 1 - Simple text output

Demo 2 - Output html file with text replacing

Demo 3 - Use textbox and listbox

Demo 4 - Send email

Login

Use URL http://x.x.x.x/demo to login. The demo directory is configured to have application level authentication. Set arbitrary user information:

Demo 1 - Simple Text Output

Web page

CGI code in cgidemo.c

int Demo1()

{ int i;

// HTML header

printf("%s",htmHead);

// messages

printf("This page is generated by demo1.<BR><BR>\r\n");

// hello world

for(i=1;i<=10;i++)

{ printf("Hello World %d<BR>\r\n",i);

}

// Show user and password, if any.

s=getenv("REMOTE_USER");

if(s) printf("User: %s<BR>\r\n",s);

s=getenv("REMOTE_PASSWORD");

if(s) printf("Password: %s<BR>\r\n",s);

// HTML tail

printf("%s",htmTail);

return 1;

}

Demo 2 - Output HTML File with Text Replacing

Web page

CGI code in cgidemo.c

int Demo2()

{

// Read entire htm page into buffer for editing.

if(!HttpReadFile("demo2.htm")) return 0;

// replace tag with text

ReplaceTag("%01","Hello World 1");

ReplaceTag("%02","Hello World 2");

// send out the htm page after editing.

HttpSendResponse(SHOW_ALL);

return 1;

}

Demo 3 - Use TextBox and ListBox

Web page

CGI code in cgidemo.c

int Demo3a()

{

// Read and send htm page until the mark "//**" in JavaScript.

if(!HttpReadFile("demo3.htm")) return 0;

HttpSendResponse(SHOW_SCRIPT1);

// Set the contents of Textbox and Listbox

SetTextBox("ctTextBox","Hello World !");

SetListBox("ctListBox","2");

// end of script

// Read and send htm page after the mark "//**" in JavaScript.

HttpSendResponse(SHOW_SCRIPT2);

return 1;

}

Web page

CGI code in cgidemo.c

int Demo3b()

{

if(!HttpReadFile("demo4.htm")) return 0;

HttpSendResponse(SHOW_FORM1);

printf("==== start ====<BR>\n");

// Show text box contents

if(CgiGetStr("ctTextBox",m_Str,100))

{ printf("TextBox = \"%s\"<BR>\n",m_Str);

}

// Show list box contents

if(CgiGetStr("ctListBox",m_Str,100))

{ printf("ListBox = %s<BR>\n",m_Str);

}

// Additional message can be shown here

printf("==== end ====<BR>\n");

// Send 2nd part of Html

HttpSendResponse(SHOW_FORM2);

return 1;

}

Demo 4 - Use email