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POVerify random URLs on a network in Java
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copied!<p>This question may be a bit too low-level, but I couldn't find an answer already.</p> <p>I'm typing this next paragraph so that you can correct me/ explain the things I refer to unwittingly. You know in a web browser you can type directory paths from your own computer, and it will bring them up? Apparently, it also works with pages within a local network. If there's another page on the same subnet, you can access it with "http://pagename/".</p> <p>On the network I'm a part of, there are a lot of these pages, and they all (or mostly) have common, single-word names, such as "http://word/" . I want to test, using Java, a dictionary of common words to see which exist as locations on the network. Of course, there's probably an easier way if I know the range of ip addresses on the network, which I do. However, I get the "page not found" page if I try typing the IP address of, say, "http://word/" (which I get from ping), into the address bar. This is true even if "http://word/" works.</p> <p>So say I loop through my word bank. How can I test if a URL is real? I've worked out how to load my word bank. Here's what I have right now </p> <pre><code> URL article=new URL("http://word"); //sample URL URLConnection myConn=article.openConnection(); Scanner myScan=new Scanner(new InputStreamReader(myConn.getInputStream())); System.out.println(myScan.hasNext()); //Diagnostic output </code></pre> <p>This works when the URL is constructed with a valid URL. When it gets passed a bad URL, the program just ignores the <code>System.out.println</code>, not even making a new line. I know that different browsers show different "page not found" screens, and that these have their own html source code. Maybe that's related to my problem?</p> <p>How can I test if a URL is real using this method? Is there a way to test it with IP addresses, given my problem? or, why am I having a problem typing in the IP address and not the URL?</p>

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