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OSGi: What are the differences between Apache Felix and Apache Karaf?
...es are the features added by Karaf:
Therefore, unless you have specific needs which are not met by Karaf (requiring access to the underlying implementation) it usually makes sense to use this since it provides more 'out of the box'.
...
How to fluently build JSON in Java?
...
See the Java EE 7 Json specification.
This is the right way:
String json = Json.createObjectBuilder()
.add("key1", "value1")
.add("key2", "value2")
.build()
.toString();
...
How are POST and GET variables handled in Python?
... self.response.write(name) # this will write on the document
So you really will have to choose one of those frameworks.
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Get week of year in JavaScript like in PHP
...light saving was observed and years where 1 Jan was Friday. Fixed by using all UTC methods. The following returns identical results to Moment.js.
/* For a given date, get the ISO week number
*
* Based on information at:
*
* http://www.merlyn.demon.co.uk/weekcalc.htm#WNR
*
* Algor...
How many socket connections can a web server handle?
...Jeremy FriesnerJeremy Friesner
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File path to resource in our war/WEB-INF folder?
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It's worth pointing out that I needed to put an initial / in the path to get this to work, like this: context.getResourceAsStream("/WEB-INF/test/foo.txt");
– Mick Sear
Jun 16 '11 at 15:06
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How to force the browser to reload cached CSS/JS files?
...write if there are exactly 10 digits at the end. (Because 10 digits covers all timestamps from 9/9/2001 to 11/20/2286.)
First, we use the following rewrite rule in .htaccess:
RewriteEngine on
RewriteRule ^(.*)\.[\d]{10}\.(css|js)$ $1.$2 [L]
Now, we write the following PHP function:
/**
* Give...
Regular expression for letters, numbers and - _
...
To actually cover your pattern, i.e, valid file names according to your rules, I think that you need a little more. Note this doesn't match legal file names from a system perspective. That would be system dependent and more libera...
“Keep Me Logged In” - the best approach
...e algorithm that you used. For example:
md5(salt+username+ip+salt)
Now, all an attacker needs to do is brute force the "salt" (which isn't really a salt, but more on that later), and he can now generate all the fake tokens he wants with any username for his IP address! But brute-forcing a salt is...
CURL alternative in Python
I have a cURL call that I use in PHP:
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