Regular Expression for Finding URL (ending with FLV/flv)

Question

I need to get all instances of http://someurl/somefile.flv within a HTML file. Extension must not be case sensitive.

I currently use the following simple regular expression that I use in Javascript:

var rePattern = new RegExp(
    "(http://.*.flv)",
    "gi"
  );

It has it's flaws though, especially if there is a URL and somewhere further in the file you have something mentioning FLV.

I've found various regular expressions that check for URLs, etc but I cannot correctly modify them to just search for FLV links.

Answer 1

If I were doing this, my regexp would look something like:

http:\/\/(.+)\.(.+)\.flv

I escaped my special characters, as you should do. Specifically, the two slashes, and the period right before "flv". Your regexp would incorrectly match "http://123flv" which I'm sure you don't want. My version also requires a top-level-domain, e.g., example.com. Yours would have matched http://example/x.flv which clearly isn't a valid URL. Notice, also, how I use the + instead of *, to ensure that one or more characters is present.

Hope this helps.
-tjw

Answer 2

http:\/\/[^\"\'<>{}\s]{6,255}(?<=.flv)

Answer 3

/http:\/\/[\S]+?\.flv/g

document.body.innerHTML.match(/http:\/\/[\S]+?\.flv/g)