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alternative to query string

 
Mohammad Atiq Kazi
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Hello All,

Please let me know if there is any alternative to query string for passing data. The problem is that its a link (href) through which query string is passed and hence we cannot use request or session objects. Please suggest on this..

Regards
Atiq

Mohammad Atiq<br />SCJP 5.0

 
Steve Luke
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posted 16 years ago
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You could use a form with method=post, and your link could be a javascript call that submits the form.


[ August 27, 2008: Message edited by: Steve Luke ]

Steve

 
Mohammad Atiq Kazi
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Thanks for the reply..

But my problem is that the link will be visible in mobile handset and when the user clicks on it, it will connect to application and based on the query string it will retrieve information and send it back to the user. I need to find a way to remove the query string and shorten the url.

Mohammad Atiq<br />SCJP 5.0

 
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Mohammad,
If you use a POST, just the action name is shown in the URL. The parameters are not shown.

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Is your problem that the URL is too long, or is it that there is a visible query string?
 
Mohammad Atiq Kazi
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Thanks for the replies...

My requirement is to shorten the url. Its a link which will be visible in mobile handset with some query string in it (to say in midlet application). The midlet will communicate to application to fetch data. I am searching for an alternative to query string for shortening url.

Regards
Atik

Mohammad Atiq<br />SCJP 5.0

 
William Brogden
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I has been a while since I looked at midlet capabilities.

Are you saying the a midlet can ONLY generate a GET? I thought POST was also possible.

Bill
 
Steve Luke
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Another alternative would be to use 'friendly' urls, like:
http://myserver.com/context/Steven/1/displayage.jsp
rather than
http://myserver.com/context/diaplayage.jsp?name=Steven&age=1

It makes the URLs easier to read and gets rid of the query string, but makes it a bit more complicated to put them in/pull them out of the URL. They must be ordered (if you couldn't do /context/1/Steven/displayage.jsp if the page expected /context/Steven/1/displayage.jsp) and you would need to implement a control structure that can correctly parse the URL, pull out the parameters then forward to the proper display. Not a big issue if you are using a FrontController.

For small number of parameter name/value pairs the difference is minimal (as you can see above, but for large number of name/value pairs the difference is large.

(I have also seen 'friendly' urls written as: http://myserver.com/context/displaypage.jsp/<param value 1>/<param value 2> instead of http://myserver.com/context/<param value 1>/<param value 2>/displaypage.jsp I guess because it makes it easier to parse out the directory structure of where the displaypage.jsp page is... not sure which is preferred or normal, but I like the having the displaypage.jsp at the end...)

Steve

 
Mohammad Atiq Kazi
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Thanks for your replies..

The url will be generated in a dynamic way. We cannot create a separate directory for each url here. Only a single jsp page handles request and based on the query string passed, it will fetch data from the database and send it to midlet. The url looks like this
http://abc.com/abc.jsp?soId=56&pd=26
I need to shorten this url and make it smaller and meaningful. Here abc.jsp handles all requests.

Regards
Atik

Mohammad Atiq<br />SCJP 5.0

 
Gregg Bolinger
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posted 16 years ago
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Using friendly URL's doesn't mean you have to use directories. But if you are using a JSP as a front controller it does make things a bit more difficult. If you were using a Servlet, for example, you could map it to something like:

/abc/*

And then you could have a URL like:

/abc/56/26

If the 'soId' always comes first and the 'pd' always comes second that is really easy to parse. Then you just do whatever with those values as you normally would as if they came in on a regular query string. I'd bet you can map a JSP similar to mapping a servlet but its been a while since I've done that so I'd have to go digging myself. But that does shorten your URL and makes it meaningful:

http://abc.com/abc/56/26/
 
William Brogden
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Making query data part of the URL as in the GET example where "abc" addresses a servlet and the numbers are submitted data:

/abc/56/26



is the REST approach to using standard HTTP for web services.
Sun is supporting the open-source Jersey project for the server side of RESTful web services. Here is my simple article on an example.

Jersey uses Java annotations to take care of parsing that URL for you.

Bill
 
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