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In shell, I need to extract specific query parameter from URI.
I tried to play around with this to get "offset" value
echo "/mypath/index.php?offset=20&query=uro" | perl -MURI -le 'chomp($url = <>); print URI->new($url)->query_form("offset")'
But it always returns just offset=20&query=uro
Please help
370
Yes, that's what you should be doing. encodeURIComponent is the correct way to encode a text value for putting in part of a query string. but when it is decoded at the server, the parameters of url are interpreted as seperate parameters and not as part of the single url parameter.
Query parameters are a defined set of parameters attached to the end of a url. They are extensions of the URL that are used to help define specific content or actions based on the data being passed.
To check if a url has query parameters, call the indexOf() method on the url, passing it a question mark, and check if the result is not equal to -1 , e.g. url. indexOf('? ') !== -1 .
URL parameters or query string parameters are used to send a piece of data from client to server via a URL. They can contain information such as search queries, link referrals, user preferences, etc..
In this tutorial, learn different ways to read query parameters in javascript. query parameters are key and value pairs added to url to pass the simple parameters For example, if url is cloudhadoop.com/about?name=johh&dept=sales. window.location.search //name=johh&dept=sales location.search // name=johh&dept=sales
The URLSearchParams.getAll () method returns all of the values associated with a certain parameter: The URLSearchParams interface specifies the utility methods to work with the query string of a URL. The URLSearchParams suggests a consistent interface to the pieces of the URL and allows a manipulation of the query string (what comes after "?").
If the parameter is defined within URL then splitting it by &. var split_url = url.split ('?'); para_str = split_url [1]; if (para_str != undefined) { var parts = para_str.split ('&'); } After that, the process of parameter extraction is similar to the undefined case.
query_form returns a hash, change your script to:
perl -MURI -le 'chomp($url = <>); print +{URI->new($url)->query_form}->{offset}'
In order to process multiple lines:
perl -MURI -nle 'print +{URI->new($_)->query_form}->{offset}'
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