Display RSS with DOM

Gegeben die Annahme, dass get_remote_dom.asp (5.4) erfolgreich war, dann befindet sich in der Variablen root.xml der RSS Text.

Mittels den DOM Funktionen werden wir nun die uns interessierenden Bereiche herausfiltern und anzeigen.

<?xml version="1.0"?>
<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">
<channel><title>Trading Shares Online</title>
<link>http://tradingsharesonline.com</link>
<description>Find out secrets about trading shares online. Get free tips and advice from professional traders on trading shares at stock market and investing. Use our worldwide resource of latest information on share prices, financial news, currency rates, markets and investments.</description>
<copyright>Copyright 2005 All Rights Reserved</copyright>
<language>en</language>
<managingEditor>info@tradingsharesonline.com</managingEditor>
<webMaster>info@tradingsharesonline.com</webMaster>
<item>
			<title>A Guide to Indexes and Futures</title>
			<link>http://tradingsharesonline.com/articles.php?article=108</link>
			<description>Many people think that investing in the stock market means that you're going to either be buying stocks or bonds... after all, those are the more well-known types of investment, and it stands to reason that some people would think that they were the only types available.</description>
			<pubDate>Sat, 12 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>What's the .382 Fibonacci Ratio in Forex Trading?</title>
			<link>http://tradingsharesonline.com/articles.php?article=107</link>
			<description>It was mentioned in a past article that Fibonacci forex trading is the basis of many forex trading systems used around the world by profitable forex traders. These systems are all based on the famous Fibonacci ratios (.236, .50, .382, .618, etc.) and each of them can specialize in a particular ratio along with other minor indicators in order to make the pinpointing of the entry and exit levels as accurate and profitable as possible.</description>
			<pubDate>Fri, 11 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>What's Fibonacci Forex Trading?</title>
			<link>http://tradingsharesonline.com/articles.php?article=106</link>
			<description>Fibonacci forex trading is the basis of many forex trading systems used by a great number of professional forex brokers around the globe, and many billions of dollars are profitable traded every year based on these trading techniques...</description>
			<pubDate>Thu, 10 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>Dissecting Income Statement</title>
			<link>http://tradingsharesonline.com/articles.php?article=105</link>
			<description>Knowing income statement real well is critical to your investing success. Income Statement is crucial in determining the fair value of a common stock. Why? Because I believe that the fair value of any investment is determined by the return it can generate for a given price...</description>
			<pubDate>Wed, 09 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>The Allure of Dividend</title>
			<link>http://tradingsharesonline.com/articles.php?article=104</link>
			<description>Investors wanting to pick undervalued stocks need to look closely at dividend. For one thing, dividend drops money straight into your pocket. Your stock price do not have to rise to make profits. Another thing is that only company that have extra cash will give dividends. This requires them to be highly profitable. Investing in profitable companies will breed success if investors buy them at the right price...</description>
			<pubDate>Tue, 08 Nov 2005 14:30:00 -0700</pubDate>
		</item>
		<item>
			<title>Reveal Day Trade Losers' Secrets</title>
			<link>http://tradingsharesonline.com/articles.php?article=103</link>
			<description>I attended a lot of seminars and trainings. I also bought many trading books and tried to find secrets of trading. However, 99% of what they know, I can get it from Internet for free. Instead, I find a secret for losers...</description>
			<pubDate>Mon, 07 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>When To Buy And Sell</title>
			<link>http://tradingsharesonline.com/articles.php?article=102</link>
			<description>The mechanism of buying and selling is quite easy. It is as easy as pressing a button in front of your computer screen. The question of when investors should buy and sell warrant a more detailed analysis.</description>
			<pubDate>Sun, 06 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>5 Common Misuse of P/E Ratio</title>
			<link>http://tradingsharesonline.com/articles.php?article=101</link>
			<description>Price Earning (P/E) Ratio is the most widely used ratio in investing. Searching the term 'P/E ratio' into Google will yield 2.3 million results. Quite simply, P/E ratio is the ratio of Stock price divided by its Earning per Share (EPS)...</description>
			<pubDate>Sat, 05 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>10 Reasons for Selling</title>
			<link>http://tradingsharesonline.com/articles.php?article=100</link>
			<description>During your investing career, you will do these two transactions; buying and selling. Buying requires knowing the fair value of a stock and then compare it with recent price. If recent stock price is 10% below fair value and an investor does not mind getting a 10% return, then he should buy the stock. If not, he can then move on to other stocks...</description>
			<pubDate>Fri, 04 Nov 2005 16:30:00 -0700</pubDate>
		</item>
		<item>
			<title>The Difference Between Down and Out</title>
			<link>http://tradingsharesonline.com/articles.php?article=99</link>
			<description>As turnaround investors, I prefer to invest in companies that are down but not out. This is important because a lot of times, investors misunderstood the two. Often times, these two types of companies are trading near or at their 52 week low. But the similarity ends there...</description>
			<pubDate>Thu, 03 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>Don't Just Pick Any Dividend</title>
			<link>http://tradingsharesonline.com/articles.php?article=98</link>
			<description>Dividend is earnings distributed to the shareholders in the form of cash. Now, not all publicly-traded companies pay dividend. Most of the dividend-paying companies are profitable or have long history of profitability. This is key because in the long run, I believe profit will dictate stock price movement. Therefore, picking a good dividend paying stocks will pay off in the long run.</description>
			<pubDate>Wed, 02 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>Learn Stock Trading From Playing Poker</title>
			<link>http://tradingsharesonline.com/articles.php?article=97</link>
			<description>Picking good stocks is only the first step to become a consistently profitable trader. Those of you that track the performances of stock picks... know that it is impossible to determine if a stock is good without a good exiting strategy. </description>
			<pubDate>Tue, 01 Nov 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>Properly Funding Your Trading Account</title>
			<link>http://tradingsharesonline.com/articles.php?article=96</link>
			<description>Although many will suggest that you can trade with the minimum margin requirement we do not necessarily recommend it...</description>
			<pubDate>Mon, 31 Oct 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>"How To" Start Trading The Forex Market? (Part 2)</title>
			<link>http://tradingsharesonline.com/articles.php?article=95</link>
			<description>Why is FOREX trading so popular? Because you can trade from anywhere. From your kitchen table, bedroom, garage or from the nearest Starbucks coffeehouse (most of them have wireless Internet connection). If you have or like to travel, take your laptop with you and you can trade the FOREX anywhere...</description>
			<pubDate>Sun, 30 Oct 2005 14:25:00 -0700</pubDate>
		</item>
		<item>
			<title>Interested in FOREX Trading?</title>
			<link>http://tradingsharesonline.com/articles.php?article=94</link>
			<description>The Foreign Exchange Market (FOREX) has no central exchange location yet it is the largest financial market in the world. It is over 3x's the size of the stock and futures markets combined and operates via an electronic network of a banks, corporations and investors. </description>
			<pubDate>Sat, 29 Oct 2005 14:30:00 -0700</pubDate>
		</item>
		<item>
			<title>"How To" Start Trading The Forex Market?</title>
			<link>http://tradingsharesonline.com/articles.php?article=93</link>
			<description>What Is FOREX or FOREX MARKET? PART I The Foreign Exchange market (also referred to as the Forex or FX market) is the largest financial market in the world, with over $1.5 trillion changing hands every day. That is larger than all US equity and Treasury markets combined! </description>
			<pubDate>Fri, 28 Oct 2005 14:20:00 -0700</pubDate>
		</item>
		<item>
			<title>Your Guide To Successful Forex Trading</title>
			<link>http://tradingsharesonline.com/articles.php?article=92</link>
			<description>If you were wondering: forex trading is nothing more than direct access trading of different types of foreign currencies. In the past, foreign exchange trading was mostly limited to large banks and institutional traders however; recent technological advancements have made it so that small traders can also take advantage of the many benefits of forex trading just by using the various online trading platforms to trade. </description>
			<pubDate>Thu, 27 Oct 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>Five Reasons You Have to Start Forex Trading</title>
			<link>http://tradingsharesonline.com/articles.php?article=91</link>
			<description>Why should you consider foreign exchange, or forex trading? One compelling reason is that it is a huge business, trading nearly two trillion U.S. dollars on a daily basis. The potential to make money is out there for the well-informed trader. The forex market is the largest in the world. </description>
			<pubDate>Wed, 26 Oct 2005 15:55:00 -0700</pubDate>
		</item>
		<item>
			<title>3 Steps To Profitable Stock Picking</title>
			<link>http://tradingsharesonline.com/articles.php?article=90</link>
			<description>Stock picking is a very complicated process and investors have different approaches. However, it is wise to follow general steps to minimize the risk of the investments. This article will outline these basic steps for picking high performance stocks. </description>
			<pubDate>Tue, 25 Oct 2005 15:30:00 -0700</pubDate>
		</item>
		<item>
			<title>Generate Consistent Stock Market Profit Through Credit Spread Writing</title>
			<link>http://tradingsharesonline.com/articles.php?article=89</link>
			<description>Many traders and investors dream about making consistent profit on the stock market. Typically, investors would turn to fundamental analysis for medium to long term capital gains while traders would try to time the market using technical analysis to spot reversals or advantageous entry point and exit with the first sign of trouble.</description>
			<pubDate>Mon, 24 Oct 2005 16:30:00 -0700</pubDate>
		</item>
	</channel>
</rss>

Wir interessieren uns zunächst für statische Informationen aus dem "RSS-Header" wie Name des Anbieters, Link zur Anbieter Homepage, Kurze Beschreibung, Sprache.

Hierzu selektieren wir die Informationen mit der "selectSingleNode" Funktion (MSXML 4.0).

" xmlDoc.async = False xmlDoc.resolveExternals = False xmlDoc.validateOnParse = False xmlDoc.loadXML(root.xml) dim oTitle,oLink,oDesc,oCopy,oLang set oTitle=xmlDoc.selectSingleNode("*/channel/title") set oLink=xmlDoc.selectSingleNode("*/channel/link") set oDesc=xmlDoc.selectSingleNode("*/channel/description") set oCopy=xmlDoc.selectSingleNode("*/channel/copyright") set oLang=xmlDoc.selectSingleNode("*/channel/language") %>

Okay, dieses Beispiel zeigt zunächst nur den Anbieter an, die eigentlichen Artikelzusammenfassungen aber noch nicht.
Dann gehen wir gleich einen Schritt weiter und bauen auch die Artikel in unsere Homepage ein.

Die Artikelliste wird mit "SelectNodes" angesprochen. Das sieht dann zunächst so aus.

" xmlDoc.async = False xmlDoc.resolveExternals = False xmlDoc.validateOnParse = False xmlDoc.loadXML(root.xml) rem kopiere den XML Text ins XML Document dim oTitle,oLink,oDesc,oCopy,oLang set oTitle=xmlDoc.selectSingleNode("*/channel/title") set oLink=xmlDoc.selectSingleNode("*/channel/link") set oDesc=xmlDoc.selectSingleNode("*/channel/description") set oCopy=xmlDoc.selectSingleNode("*/channel/copyright") set oLang=xmlDoc.selectSingleNode("*/channel/language") %>

Artikel " & cstr(item+1) & " " & sName & "

Jetzt müssen wir noch einen eleganten Weg finden um die Elemente (

title, 
link, description und pubDate

) zu extrahieren und darzustellen.

Artikel " & cstr(item+1) & " " & strTitle & "

Artikel Lesen

That's it. Our first working sample. Our server downloads an RSS file from another server and delivers HTML code to the browser.
Geschrieben von Matthias Jungbauer am 13. November 2005.

(get_remote_dom_liste.asp)

Bevor man den Quelltext einfach so kopiert und in seine eigenen Arbeiten übernimmt, sollte man wissen, dass auf jegliche Fehlerprüfung verzichtet wurde. Es kann zu sehr empfindlichen Störungen deiner Webseite kommen, falls du auf ausführliches testen verzichten solltest.

Geschrieben von Matthias Jungbauer am 13. November 2005