Slash at the end of url - url

Question

I think (correct me if I am wrong) that it is better to put a / at the end of most of url. Like this: http://www.myweb/file/
And not put / at the end of filenames: http://www.myweb/name.html
I have to correct that in a website with a lot of links. Is there a way I can do that in a fast way. For instance in some programs like Dreamweaver I can use find and replace.
The second case is quite easy with Dreamweaver:
- Find: .html/"
- Replace: .html"
But how can I say something like:
- Find: all the links that end with a directory. Like http://www.myweb/file
- Replace: the same link but with a / at the end. Like http://www.myweb/file/

Answer 1

Your approach may work but it is based on the assumption that all files have a file extension.
There is a distinct difference between the urls http://www.myweb/file and http://www.myweb/file/ because the latter could resolve to http://www.myweb/file/index.php, or any other in the default set configured in your web server. That URL could also reference a perfectly valid file which doesn't contain a file extension, such as if it were a REST endpoint.
So you are correct insofar as you should explicitly add a "/" if you are referring to a directory, for example if you are expecting the web server to look up the correct index page to respond, or doing a directory listing.
To replace the incorrect URLS, regular expressions are your friend.
To find all files which have an erroneous "/" you could use /\.(html|php|jpg|png)\//, adding as many different file extensions into that pipe-separated list as you like. You can then replace that with .$1 or .\1 depending on your tool.
An example of doing this with Perl would be:
perl -pi -e 's/\.(html|php|jpg|png)\//.\1/g' theFileYouWantToCheck.html
Of (if you're using a Linux-based system) you can automate that nicely with find:
find path/to/html/root -type f -name "*.html* | xargs perl -pi -e 's/\.(html|php|jpg|png)\//.\1/g'
which will find all html files in the directory and do an inline find and replace. Assuming you're using version control, it's then easy to see the changes it's applied :)
Update
Solving the problem for adding a slash to directories isn't trivial. The approach I'd take:
Write a script to recurse through your website structure locally, making a list of all files
Parse the HTML files to extract all href=".*" and replace them with href=".*/" only if the end of the URL isn't present in the list extracted by the first script.
Any text-based find and replace is not going to be aware of whether the link is actually to a file or not.