REGEX: Capture Filename from URL without file extension

Question

I am trying to create a Javascript Regex that captures the filename without the file extension. I have read the other posts here and \'goto this page: http://gunbl

Answer 1

I did not find any of the answers to be near robust enough. Here is my solution.

function getFileName(url, includeExtension) {
    var matches = url && typeof url.match === "function" && url.match(/\/?([^/.]*)\.?([^/]*)$/);
    if (!matches)
        return null;

    if (includeExtension && matches.length > 2 && matches[2]) {
        return matches.slice(1).join(".");
    }
    return matches[1];
}

var url = "http://example.com/index.htm";
var filename = getFileName(url);
// index
filename = getFileName(url, true);
// index.htm

url = "index.htm";
filename = getFileName(url);
// index
filename = getFileName(url, true);
// index.htm

// BGerrissen's examples
url = "http://stackoverflow.com/questions/3671522/regex-capture-filename-from-url-without-file-extention";
filename = getFileName(url);
// regex-capture-filename-from-url-without-file-extention
filename = getFileName(url, true);
// regex-capture-filename-from-url-without-file-extention

url = "http://gunblad3.blogspot.com/2008/05/uri-url-parsing.html";
filename = getFileName(url);
// uri-url-parsing
filename = getFileName(url, true);
// uri-url-parsing.html

// BGerrissen fails
url = "http://gunblad3.blogspot.com/2008/05/uri%20url-parsing.html";
filename = getFileName(url);
// uri%20url-parsing
filename = getFileName(url, true);
// uri%20url-parsing.html

// George Pantazis multiple dots
url = "http://gunblad3.blogspot.com/2008/05/foo.global.js";
filename = getFileName(url);
// foo
filename = getFileName(url, true);
// foo.global.js

// Fringe cases
url = {};
filename = getFileName(url);
// null
url = null;
filename = getFileName(url);
// null

To fit with the original question, the default behavior is to exclude the extension, but that can easily be reversed.