Q: I want a regular expression to validate the URL but i wanna to allow this character(~)the Tilda
something like this url:
http://stackoverflow.com/questions/~/
allowing http or without http
thanks in advance
EDIT:
i find a perfect one finally:
(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,#?^=%&:/~\+#]*[\w\-\#?^=%&/~\+#])?
but i wanna to allow the user to enter the url with the protocol or without it to prevent any confusion how to do that.
To allow non-consecutive tildes:
\w+([-+.'~]\w+)*
To allow tildes anywhere:
[\w~]+([-+.'][\w~]+)*
you can try with this one:
\b(https?|ftp|file)://[-A-Z0-9+&##/%?=~_|$!:,.;]*[A-Z0-9+&##/%=~_|$]
if you don't need the HTTP,FTP... youc an take it off like:
\b[-A-Z0-9+&##/%?=~_|$!:,.;]*[A-Z0-9+&##/%=~_|$]
Regards,
HTH.
I'm not sure what do u want. But
\w+([~'\.]\w+)+
Valid for
justname'com
just_name~com
justname.com
Invalid for
justname
just-name-com
If you use
\w+([~]?)\w+\.\w+
Valid for
justname.com
just~name.com
Invalid for
justname'com
just_name~com
just-name-com
There is a very good regular expressions site here where you can get almost any regular expressions. Think this would be useful to you.
Related
I'm trying to validate submitted data against Regex expressions in Firestore Security Rules. I've read through the documentation, but I'm still unsure how to write them.
I read through the Regex documentation here https://firebase.google.com/docs/reference/security/database/regex , but it doesn't really show how to use it in Firestore. I tried using an 'allow validate' rule and copy/pasted a regex expression from the docs, but I'm getting all kinds of errors.
Here's what I tried:
Do I need to put it in a format like this? (From the docs) allow create: if !("ranking" in request.resource.data)? If so, how do I use a regex expression with it?
It looks like you're trying to start a regex with /. That's not going to work - it's not like perl. Slash starts a path object. Might want to check the API documentation on this. You should just be passing a plain string to matches() that contains the regex to match.
https://firebase.google.com/docs/reference/rules/rules.String#matches
In my application, I redirect an HTTP request and also pass a parameter. Example:
http://localhost:9000/home;signup=error
Is it better to use a ; or shall I use a ? i.e. shall I do http://localhost:9000/home;signup=error or http://localhost:9000/home?signup=error?
Are the above two different from each other semantically?
The ? is a reserved character; I have read that this is both valid and invalid, but I have used it for 'slugs' when templating.
Should you choose to use it, percent-encode the query string using %3F which is not human readable, but will produce the ?. (An encoder is recommended)
Perhaps you will find a more suitable solution for your redirects by adding an .htaccess file to your project.
Is that possible to get the ACSIdx value through OGNL expression ?
I have many ACS in one connection and need to do some action based on ACSIdx value.
I tried using #this.get("ACSIdx") which didnt work.
Any idea on this?
No, you cannot get the ACSidx in an OGNL expression in PingFederate.
I need a regex for the ASP.Net (4) Regex Validation control. It needs to be a RegEx validator to support other dynamic behaviors outside the scope of this post..
I was using the following, but it fails if the user enters the % sign following the number (which is a req of my spec):
^(100(?:\.0{1,2})?|0*?\.\d{1,2}|\d{1,2}(?:\.\d{1,2})?)$
I tried adding an atomic group of ^(?>%?) at the end, with no luck, after reading the excellent post
Regular expression greedy match not working as expected
Does anyone have any ideas?
Try this
^(100(?:.0{1,2})?%?|0*?.\d{1,2}%?|\d{1,2}(?:.\d{1,2})?%?)$
try this one instead:
^0*(100(\.00?)?|[0-9]?[0-9](\.[0-9][0-9]?)?)%?$
For example:
http://stackoverflow.com/questions/698627/ms-access-properties
The number is part of the URL but is an argument to the web app as opposed to other options like:
http://www.google.com/firefox?client=firefox-a&rls=org.mozilla:en-US:official
where all the args come after the '?'. I have used the second form before and I'm only trying to learn about the first form.
I'm sure I can find what else I need once I known what that's called so I can Google it.
URL Rewriting, generally.
Edit: Here is a good introduction to URL Rewriting.
Variables passed in the form of a URL are called the Query String. In a url like:
http://examples.com?a=b&c=d&e=f
The query string is ?a=b&c=d&e=f
In the Stackoverflow example, it uses URL Rewriting, specifically with MVC Routing to make 'pretty URLs'. There are other ways to do it in other languages. Some make use of Apache's mod_rewrite (example) while others parse the requested URI. In PHP a url like
http://example.com/index.php/test/path/info
can be parsed by reading $_SERVER['PATH_INFO'] which is /text/path/info.
Generally, they are using URL Rewriting to simulate the query string however. In the Stackoverflow example:
http://stackoverflow.com/questions/698711/what-is-the-name-for-that-thing-that-lets-part-of-the-url-be-an-argument
The important parts are the questions/698711. You can change the title of the question with impunity but the other two parts you cannot.
It's usually called the 'path info'.
That's just URL mapping. It lets you use pretty URLs instead of a large query string.
I believe the StackOverflow URL works that way because it is using MVC whereas your bottom example is using standard requests.
It is indeed done by URL rewriting.
Usually, web application frameworks do this automatically if you install it correctly on your server.
Check out CakePHP as an example.
It's called a URL parameter and uses the HTTP GET method. As others mentioned, it can be rewritten using URL rewriting so that the URL is easier to read and use. Some search keywords: "SEF URLs", "Apache Rewrite", "pretty URLs".