How can I parse content of entered URL?

Question

I need to parse content type of typed URL:

if it's an image then do something.
if it's a web page then scan this page for images and fill array with images' SRC attributes (and order it by size).

How can i do this using only JS? How can i do this using only ASP.NET and C#?

You should get the headers, after that everything is easy. http://stackoverflow.com/questions/220231/accessing-http-headers-in-javascript — noob, Dec 21 '11 at 08:47
@Shoban Yes. java script: you have a string (i.e. url). You must parse it and fill Array. c#: you have a string (i.e. url). You must parse it and fill ArrayList. — , Dec 21 '11 at 08:50

score 0 · Answer 1 · answered Dec 21 '11 at 08:47

0

You can't if the URL is an image for sure. Either you go for url.match( /\.jpg|\.gif|\.png/ ) === nil (and other extensions, of course), or you make a GET call to the URL and look and the Content-Type in the response header.

answered Dec 21 '11 at 08:47

Julio Santos

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score 0 · Answer 2 · answered Dec 21 '11 at 08:48

0

i'm not familiar with java but try this: http://docs.oracle.com/javase/tutorial/networking/urls/urlInfo.html

answered Dec 21 '11 at 08:48

Atom Vayalinkal

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Oops didnt see you wanted just JS! – Atom Vayalinkal Dec 21 '11 at 08:48

score 0 · Answer 3 · answered Dec 21 '11 at 08:56

Here is how you can do it in C# (by actually making a request and inspecting the content type of the response):

    public static bool IsImage(string url)
    {
        WebRequest req = HttpWebRequest.Create(url);

        try
        {
            WebResponse resp = req.GetResponse();
            return resp.ContentType.StartsWith("image");
        }
        catch { }

        return false;
    }

How can I parse content of entered URL?

3 Answers3