Extract all Images from HTML whose width or height higher than a specified value - Regex

Question

I'm trying to make a small link share function with Classic ASP like LinkedIn or Facebook.

What I need to do is to get HTML of remote URL and extract all the images whose width are greater than 50px for example.

I can crawl and take the HTML and also I can find the images with this regex:

<img([^<>+]*)>

It matches; <img src="/images/icon.jpg" width="60" height="90" style="display:none"/>

Then I'm able to extract the path but sometimes it matches <img src="/track.php" style="display:none" width="1" height="1"/> which is not a real image.

Anyway, I feel like you are gonna be mad because of classic ASP but my company ....

I know there are lots of topics about this issue and mostly, they recommend not to USE regex but I couldn't find a way to this with classic asp. Is there a component or something to this?

Regards

@SLaks♦: Ok, then I guess I have to check every image the regex matches with Microsoft.XMLHTTP. [link](http://forums.aspfree.com/code-bank-54/get-remote-image-width-and-height-using-pure-asp-113649.html) — Burak F. Kilicaslan, Jun 13 '11 at 23:09
Javascript would be the way to go for this. Are you able to use that? — Chris Sobolewski, Nov 18 '11 at 15:33

agent-j · Answer 1 · 2011-06-13T23:27:40.727

0

This will get you close:

<img [^>]*width="(0?[1-9]\d{2,}|[5-9]\d)"[^>]*>

It accepts image tags with a width of 50 or greater.

Edit: tags with unspecified widths:

<img [^>]*width="(0?[1-9]\d{2,}|[5-9]\d)"[^>]*>|<img ((?!width=)[^>])*>

edited Jun 13 '11 at 23:27

answered Jun 13 '11 at 23:09

agent-j

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Crazy problems beget crazier solutions.... I agree with @SLaks, though. If you have any other option, take it. – agent-j Jun 13 '11 at 23:11
thanks @agent-j but as @Francisc stated, regex will fail if image tag does not specify dimensions. – Burak F. Kilicaslan Jun 13 '11 at 23:11
What if height comes before width? – SLaks Jun 13 '11 at 23:11
Another dead end for regex to parse HTML with Classic ASP :) – Burak F. Kilicaslan Jun 13 '11 at 23:13
the `[^>]*` matches until the end of the image tag (or until something like `alt="Hello > world"`. So, it doesn't matter where the height attribute is. – agent-j Jun 13 '11 at 23:24

Extract all Images from HTML whose width or height higher than a specified value - Regex

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