CMPS-3350 Lab-3

Step 1:

You should do the programming of your C++ program for this lab on your local Desktop.

When this lab is complete, copy your program files

lab3sget.cpp
Makefile

to your 3350/3/ directory on Odin.

Step 2:

Create a C++ program using the code sample at:

/home/fac/gordon/p/3350/code/lab3/lab3sget.c

Important:
Save this program immediately to your Odin /3350/3/ folder please.

Step 3:

Create a Makefile that includes the following compile line...


g++ lab3sget.cpp -Wall -olab3sget -lssl -lcrypto




Note:
You are refactoring a C program into the C++ language.

Complete the rest of the Makefile. 
Build your program with make.

Step 4:

Please fix all compile warnings and errors.

Enter a comment above the code related to each error or warning that you fix.
Include the original code that was fixed, in the comment.

For example:

//---------------------------------------------------------------------
//Fixed warning: deprecated conversion from string constant to 'char*'
//Previous code was:
//   void getHost(char *hostname)
//---------------------------------------------------------------------
void getHost(const char *hostname)
{
    ...
    ...
    ...




Step 4a:
 . Style this program using the Linux style guide.
  Main features...
   . Apply perfect K&R brace, space, and indenting.
   . No lines will wrap on an 80-character window.
   . Choose hard-tabs or spaces for indenting, but do not mix them.
   . One command per LOC (line of code)
   . Fix all compile warnings and errors.

Step 5:

Run lab3sget with the following parameters...

www.google.com
robots.txt


example:
./lab3sget www.google.com robots.txt

What you should see is a list of restrictions posted by the owner of the website you are accessing.


As you can see, accessing a website using automated means is restricted.
When using your HTTP program, always check the robots.txt file, and
follow the instructions for that site.

Step 7:

Create a PHP program in your Odin public_html directory...
It will have this URL:

	https://cs.csub.edu/~username/3350/lab3/lab3.php

where username is your own Odin account name.

If you have any questions about the path to your lab3.php, please ask
about it during lab.


Here is a sample PHP program example...


<?php
echo "This is my php file.";
?>

Step 8:

Run your lab3sget program and contact your PHP file.

like this... except insert your own username

    ./lab3sget  odin.cs.csub.edu  /~username/3350/lab3/lab3.php

Step 9:

Use a web browser to look at your php file

    like this...

    https://www.cs.csub.edu/~username/3350/lab3/lab3.php

Step 10:

Make some minor changes to your lab3.php program...

Allow the program to accept input:
	$param = $_GET['param'];

Process the $param variable in the PHP file.

Your new PHP program will look like this...


<?php
$param = $_GET['param'];
echo "param is: " . $param . "<br>";
if ($param == "hello") {
    echo "hey there!<br>";
} else {
    $num = $param*2+3;
    echo "number:" . $num . "<br>";
}
echo "<br>";
echo "<img src=\"lab3_diagram.gif\"/>";
?>


Required:
 1. Create a file named lab3_diagram.gif for your diagram below.

    For image file conversion...

       You may use GIMP for file conversion.

       You may also use convert from the command-prompt.

		   example: $ convert image.jpg lab3_diagram.gif

       Inside your <img> tag, apply a style element that will
       size your diagram to an appropriate size.

		   example: style="width:800px;height:auto;"

Step 11:

Run your lab3sget program and contact your PHP file like this...

./lab3sget odin.cs.csub.edu /~myname/3350/lab3/lab3.php?param=hello

Then try this...

./lab3sget odin.cs.csub.edu /~myname/3350/lab3/lab3.php?param=123

You should see the appropriate data returned.

Step 12:

Draw a Diagram!

Draw a Diagram to show the components of the system
that you just created during this assignment. Think about the flow
of data through the system. How would a user interact with it?

Your diagram might include
. your C++ program
. your local computer
. the Odin server
. the SSL certificate
. your PHP program
. the Apache web server
. your image file
. any other components you can think of
. etc.

Create an original diagram based upon how you see the components of the system.

Local drawing tool: Dia

Free online drawing tools:
draw.io
Gliffy

Create a nice diagram please.
Sloppy diagram will not be accepted.

Note, this diagram will be viewed by your instructor and by the class.
Contacting your php file will display your diagram.