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sunit
/
WebGCC
mirror of https://github.com/sunitknandi/WebGCC.git
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formatting and security fixes

Sunit Kumar Nandi 11 years ago
parent
32cb12ef6c
commit
5f1b9958a2
7 changed files with 121 additions and 63 deletions
Unified View Show Diff Stats
  1. 19 0
      .htaccess
  2. 8 0
      README.md
  3. 9 7
      header.html
  4. 24 18
      index.html
  5. 6 0
      input.html
  6. 41 29
      output.php
  7. 14 9
      textinput.php

+ 19 - 0
.htaccess
View File 

@@ -0,0 +1,19 @@
 
+## WebGCC server configuration ##
 
+
 
+# Block access to generated text input #
 
+<Files "*.txt">
 
+Order Allow,Deny
 
+Deny from all
 
+</Files>
 
+
 
+# Block access to saved source codes #
 
+<Files "*.c">
 
+Order Allow,Deny
 
+Deny from all
 
+</Files>
 
+
 
+# Block access to executables #
 
+<Files "*.bin">
 
+Order Allow,Deny
 
+Deny from all
 
+</Files>

+ 8 - 0
README.md
View File 

@@ -14,6 +14,7 @@ Features
 
 * Written in HTML and PHP.
 
 * Written in HTML and PHP.
 
 * Accepts code, standard input, command-line arguments, and text input.
 
 * Accepts code, standard input, command-line arguments, and text input.
 
 * Supports multiple execution sessions.
 
 * Supports multiple execution sessions.
 
+
 
 More features will be added soon, like graphics, a nicer code editor and library selection support.
 
 More features will be added soon, like graphics, a nicer code editor and library selection support.
 
 Feel free to fork my project, modify it and merge the changes back to it.
 
 Feel free to fork my project, modify it and merge the changes back to it.
 
 
 
@@ -59,6 +60,13 @@ Usage
 
 Just open the URL of the interface site. Rest is self-explanatory.
 
 Just open the URL of the interface site. Rest is self-explanatory.
 
 
 
 
 
+Changelog
 
+---------
 
+
 
+* 15 Dec 2013: Fixed output display formatting. Now displays error list only when there is an error/warning. Now executes code only when executable file is present. Better cleanup of session files. Now displays stderr while execution. Added comments and fixed code indentation. Also included a .htaccess file for server security.
 
+* 14 Dec 2013: First release.
 
+
 
+
 
 More info and discussion
 
 More info and discussion
 
 ------------------------
 
 ------------------------

+ 9 - 7
header.html
View File 

@@ -1,7 +1,9 @@
 
-<!DOCTYPE html>

-<html>

-

-<h1 align="center">GCC web interface</h1>

-<p align="center">Test your C/C++ codes online. By Sunit Kumar Nandi</p>

-

-</html>

+<!DOCTYPE html>
 
+<html>
 
+
 
+<!-- Header page -->
 
+<!-- Centre-aligning the text -->
 
+<h1 align="center">WebGCC: simple GCC web interface</h1>
 
+<p align="center">Test your C/C++ codes online. By Sunit Kumar Nandi.</p>
 
+
 
+</html>

+ 24 - 18
index.html
View File 

@@ -1,18 +1,24 @@
 
-<!DOCTYPE html>

-<html>	

-

-<head>

-<title>Web interface for GCC compiler</title>

-</head>

-

-

-<frameset rows="20%,80%">

- <frame name="header" src="header.html">

-   <frameset cols="60%,40%">

-      <frame name="input" src="input.html">

-      <frame name="output" src="output.php">

-   </frameset>

-</frameset>

-

-

-</html>

+<!DOCTYPE html>
 
+<html>	
+
 
+<!-- Interface page -->
 
+<head>
 
+<title>Web interface for GCC compiler</title>
 
+</head>
 
+
 
+
 
+<!-- Create two horizontal frames of 20% and 80% height -->
 
+<frameset rows="20%,80%">
 
+<!-- Load the header -->
 
+<frame name="header" src="header.html">
 
+<!-- Create two vertical frames of 60% and 40% width -->
 
+    <frameset cols="60%,40%">
 
+    <!-- Load the input frame -->
 
+    <frame name="input" src="input.html">
 
+    <!-- Load the output frame -->
 
+    <frame name="output" src="output.php">
 
+    </frameset>
 
+</frameset>
 
+
 
+
 
+</html>

+ 6 - 0
input.html
View File 

@@ -1,19 +1,25 @@
 
 <html>
 
 <html>
 
 
 
 <body>
 
 <body>
 
+<!-- Specifying how the form data should be processed -->
 
 <form name="form1" method="post" target="output" action="output.php?saving=1">
 
 <form name="form1" method="post" target="output" action="output.php?saving=1">
 
 Write your program here:
 
 Write your program here:
 
 <br>
 
 <br>
 
+<!-- Accepting program code -->
 
 <textarea name="data" cols="80" rows="10">
 
 <textarea name="data" cols="80" rows="10">
 
 </textarea>
 
 </textarea>
 
 <br><br><br>
 
 <br><br><br>
 
+<!-- Accepting standard input -->
 
 Standard input: <input type="text" name="stdin">
 
 Standard input: <input type="text" name="stdin">
 
 <br><br>
 
 <br><br>
 
+<!-- Accepting command-line agruments -->
 
 Command line arguments: <input type="text" name="args">
 
 Command line arguments: <input type="text" name="args">
 
 <br><br>
 
 <br><br>
 
+<!-- Submit button goes here -->
 
 <input type="submit" value="Run">
 
 <input type="submit" value="Run">
 
 </form>
 
 </form>
 
 <br>
 
 <br>
 
+<!-- Provide a link to text input option -->
 
 <a href="textinput.php" target="output">Click here to submit text file input</a>
 
 <a href="textinput.php" target="output">Click here to submit text file input</a>
 
 </body>
 
 </body>

+ 41 - 29
output.php
View File 

@@ -2,39 +2,51 @@
 
 
 
 <body>
 
 <body>
 
 <?php
 
 <?php
 
-$saving = $_REQUEST['saving'];
 
-if ($saving == 1){ 
-$data = $_POST['data'];
 
-$args = $_POST['args'];
 
-$stdin= $_POST['stdin'];
 
-$unique = rand(1, 10000);
 
-$file = "prog".$unique.".c";
 
-$srcpath = "./".$file;
 
-$executable = "./"."prog".$unique;
 
-$fp = fopen($file, "w") or die("<p>Couldn't open $file for writing!</p>");
 
-fwrite($fp, $data) or die("<p>Couldn't write values to file!</p>"); 
+$saving = $_REQUEST['saving']; //check whether a saving request is provided
 
+if ($saving == 1) //do if saving request is provided
 
+{ 
+    $data = $_POST['data']; //extract the code from the form into a variable
 
+    $args = $_POST['args']; //extract the command-line arguments from the form into a variable
 
+    $stdin= $_POST['stdin']; //extract the standard input from the form into a variable
 
+    $unique = rand(1, 10000); //generate a random number for the current execution session
 
+    $file = "prog".$unique.".c"; //declare the file name
 
+    $srcpath = "./".$file; //declare the source file path
 
+    $executable = "./"."prog".$unique.".bin"; //declare the executable path
 
+    $fp = fopen($file, "w") or die("<p>Couldn't open $file for writing!</p>"); //open file for writing
 
+    if(!fwrite($fp, $data)) //write the code to file
 
+    {
 
+        shell_exec("rm -rf $srcpath");
 
+        die("<p>Couldn't write values to file!</p>"); //clean up and exit if unable to write
 
+    }
 
 
 
-fclose($fp); 
-echo "<p>Saved to $file successfully!</p>";
 
+    fclose($fp); //close and save the file
 
+    echo "<p>Saved to $file successfully!</p>"; //notify the user that file has been saved
 
 
 
-echo"<p>
 
-Compiling the program $file<br>
 
-Error list:<br>";
 
-$output1 = shell_exec("g++ $srcpath -o $executable 2>&1");
 
-echo "$output1";
 
-echo "</p>";
 
-echo "<p>Running the program:<br>";
 
-$output2 = shell_exec("echo $stdin | $executable $args");
 
-echo "$output2";
 
-echo "<br>
 
-</p>";
 
-
 
-shell_exec("rm -rf $srcpath $executable");
 
+    echo"<p>Compiling the program $file<br>"; 
+    $output1 = shell_exec("g++ $srcpath -o $executable 2>&1");
 
+    /* try compiling the program with GCC and collect errors and warnings */
 
+    if($output1!=NULL)
 
+    {
 
+        echo "Error list:<br><pre>$output1</pre>"; //display the errors and warnings if present
 
+    }
 
+    echo "</p>";
 
+    if(file_exists($executable)) //check if executable exists
 
+    {
 
+        echo "<p>Running the program:<br>";
 
+        $output2 = shell_exec("echo $stdin | $executable $args 2>&1");
 
+        /* execute the file providing the necessary inputs and collect the output */
 
+        echo "<pre>$output2</pre>";
 
+        echo "<br></p>";
 
+    }
 
+    
+    shell_exec("rm -rf $srcpath $executable"); //clean up the session files
 
 }
 
 }
 
-else {
 
-echo "<p>Enter your code in the left frame and hit run to display the output.</p>";
 
+else //do if saving request is not provided
 
+{
 
+    echo "<p>Enter your code in the left frame and hit run to display the output.</p>";
 
+    /* tell the user to  fill up the form on the left frame */
 
 }
 
 }
 
 ?>
 
 ?>
 
 </body>
 
 </body>
 
 
 
-</html>
 
+</html>

+ 14 - 9
textinput.php
View File 

@@ -2,33 +2,38 @@
 
 <body>
 
 <body>
 
 <?php
 
 <?php
 
 $saving = $_REQUEST['saving'];
 
 $saving = $_REQUEST['saving'];
 
-if ($saving == 1){ 
-$data = $_POST['data'];
 
-$unique = rand(1, 10000);
 
-$file = "text".$unique.".txt";
 
+if ($saving == 1)
 
+{ 
+    $data = $_POST['data'];
 
+    $unique = rand(1, 10000);
 
+    $file = "text".$unique.".txt";
 
 
 
-$fp = fopen($file, "w") or die("<p>Couldn't open $file for writing!</p>");
 
-fwrite($fp, $data) or die("<p>Couldn't write values to file!</p>"); 
+    $fp = fopen($file, "w") or die("<p>Couldn't open $file for writing!</p>");
 
+    fwrite($fp, $data) or die("<p>Couldn't write values to file!</p>"); 
 
 
-fclose($fp); 
-echo "<p>Saved to $file successfully! You may now use $file as a text input for your program.</p>";
 
+    fclose($fp); 
+    echo "<p>Saved to $file successfully! You may now use $file as a text input for your program.</p>";
 
 }
 
 }
 
+/* Code for taking text input. Similar to the first part of output.php */
 
 ?>
 
 ?>
 
 
 
 <p>
 
 <p>
 
 <form name="form1" method="post" action="?saving=1">
 
 <form name="form1" method="post" action="?saving=1">
 
 Write your text here:
 
 Write your text here:
 
 <br>
 
 <br>
 
+<!-- Text box to take text input for program -->
 
 <textarea name="data" cols="50" rows="10">
 
 <textarea name="data" cols="50" rows="10">
 
 This is the file you can use to provide input to your program and later on open it inside your program to process the input.
 
 This is the file you can use to provide input to your program and later on open it inside your program to process the input.
 
 </textarea>
 
 </textarea>
 
 <br>
 
 <br>
 
+<!-- Submit button goes here -->
 
 <input type="submit" value="Save">
 
 <input type="submit" value="Save">
 
 <br>
 
 <br>
 
 <br>
 
 <br>
 
+<!-- Link to close text input -->
 
 <a href="output.php">Click here to close text input</a>
 
 <a href="output.php">Click here to close text input</a>
 
 </form>
 
 </form>
 
 </p>
 
 </p>
 
 
 
 </body>
 
 </body>
 
-</html>
 
+</html>