[pLog-svn] r3413 - plog/trunk/tools

[oscar at devel.lifetype.net]

Author: oscar
Date: 2006-05-14 14:51:54 +0000 (Sun, 14 May 2006)
New Revision: 3413

Added:
   plog/trunk/tools/genloadtestdata.php
Log:
script that will output a CSV file the standard output with random requests (both GET and POST) based on the contents of a LT database. The resulting CSV file/script will be "played" by another script that handles the networking part, probably interfacing with apache bench or a similar tool. This script needs to be run in the same server where the tests are going to be executed because it needs to connect to the db.

The GET_RATE and POST_RATE constants do nothing yet, so the script is a random distribution of GET and POST requests (though it'd be nice since I believe in a normal site there are a lot more GET that POST requests)


Added: plog/trunk/tools/genloadtestdata.php
===================================================================
--- plog/trunk/tools/genloadtestdata.php	2006-05-14 14:42:28 UTC (rev 3412)
+++ plog/trunk/tools/genloadtestdata.php	2006-05-14 14:51:54 UTC (rev 3413)
@@ -0,0 +1,152 @@
+<?php
+
+    /**
+     * number of requests to perform
+     */
+    define( "NUM_REQUESTS", 10 );
+    
+    /**
+     * base url for these tests
+     */
+    define( "BASE_URL", "http://localhost/plog/" );
+
+	/**
+	 * proportion of GET requests
+	 */
+	define( "GET_RATE", 70 );
+
+	/**
+	 * rate of POST requests
+	 */
+	define( "POST_RATE", 30 );
+
+    if (!defined( "PLOG_CLASS_PATH" )) {
+        define( "PLOG_CLASS_PATH", dirname(__FILE__)."/../");
+    }
+    
+    include_once( PLOG_CLASS_PATH."class/database/db.class.php" );
+    
+    // connect to the db
+    $db =& Db::getDb();
+    
+    // load the list of post and blog ids
+    $postsResult = $db->Execute( "SELECT id, blog_id FROM ".Db::getPrefix()."articles WHERE status = 1 LIMIT 1,200" );
+    while( $row = $postsResult->FetchRow()) {
+        if( !isset( $postIds[$row["blog_id"]] ))
+            $postIds[$row["blog_id"]] = Array();
+            
+        $postIds[$row["blog_id"]][] = $row["id"];
+    }
+
+    // generate some random links to blogs
+    $numBlogs = count( $postIds );
+    $numReqs  = 0;
+    
+    while( $numReqs < NUM_REQUESTS ) {
+        // select a random blog
+        $blogId = rand( 1, $numBlogs );
+
+	// and a random article from this blog
+	$articleId = $postIds[$blogId][rand(0,count($postIds[$blogId])-1)];			
+
+	// find out whether this is a POST or a GET request
+	$reqType = rand(1,2);
+	if( $reqType == 1 ) {
+		$getType = rand(1,2);
+		if( $getType == 1 ) {
+			// generate a link to the blog
+	        	$url = BASE_URL."index.php?op=Default&blogId=".$blogId;
+		}
+		else {
+			// generate a permalink
+			$url = BASE_URL."index.php?op=ViewArticle$blogId=".$blogId."&articleId=".$articleId;
+		}
+	        
+	        printGET( $url );
+	}
+	else {
+		// post a comment to any of the articles of the given blog
+		$url = BASE_URL."index.php";
+		// form values
+		$form = Array ( "articleId" => $articleId, "op" => "AddComment", "commentTopic" => generateRandomWords(rand(1,15)),
+				"commentText" => generateRandomParagraphs(rand(1,5)), "blogId" => $blogId,
+				"userName" => "loadtest" );
+		// print the request
+		printPOST( $url, $form );
+	}
+        
+        $numReqs++;
+    }
+    
+/**
+ * outputs a line to perform a GET request
+ */
+Function printGET( $url ) 
+{
+    print( "GET, $url\n" );
+}
+
+/**
+ * outputs a line to perform a POST request
+ */
+function printPOST( $url, $formVars )
+{
+	$string = "POST, $url, \"";
+	$form = Array();
+	foreach( $formVars as $key=>$value ) {
+		$form[] = "$key=$value";		
+	}
+	$formString = implode( "|", $form );
+	$string .= "$formString\"\n";
+	print($string);
+}
+
+function generateRandomWord($lenght, $uppercase = false) {
+    $newcode_length = 1;
+    $newcode = "";
+    while($newcode_length < $lenght) {
+        $a=97;
+        $b=122;
+        if ($newcode_length == 1) {
+            if (rand(1,4) == 1 || $uppercase) {
+                $a=65;
+                $b=90;
+            }
+        }
+        $code_part=chr(rand($a,$b));
+        $newcode_length++;
+        $newcode = $newcode.$code_part;
+    }
+    return $newcode;
+}
+
+function generateRandomWords( $count, $uppercase = false, $html = true) {
+    $words = generateRandomWord( rand( 3, 12), $uppercase );
+    for ($i = 1; $i < $count; $i++) {
+        $rand = rand(3, 12);
+        $words .= ' ' . generateRandomWord( $rand );
+    }
+    return $words;
+}
+
+function generateRandomParagraph() {
+    $length = rand( 3, 20 );
+    $counter = 0;
+    $text = '<p>' . generateRandomWord( rand( 3, 12 ), true );
+    while ($counter < $length) {
+        $word = generateRandomWords( rand(3, 12) );
+        $text = $text . ' ' . $word;
+        $counter++;
+    }
+    $text .= "</p>";
+    return $text;
+}
+
+function generateRandomParagraphs( $count ) {
+    $text = '';
+    for ($i = 1; $i < $count; $i++) {
+        $text .= generateRandomParagraph();
+    }
+    return $text;
+}
+?>
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