Vamp
5c077
Premium
join:2003-01-28
MD
 ·Verizon FIOS
| Saving values on a web server...
What is the easiest way to go about saving certain values to a web server so that it is interactive between users (changes reflected on both ends) on the page? It also needs to be able to handle many simultaneous requests.
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PetePuma
How many lumps do you want
Premium,MVM
join:2002-06-13
Arlington, VA | YOu need to be more specific about what you're asking. That's a really vague question. What kind of app, specifically, are you talking about? |
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Vamp
5c077
Premium
join:2003-01-28
MD | Oh sorry.. Nothing in particular, just saving values so they are accessible with javascript.
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Symcrapico
join:2002-08-08
Canada
clubs: | reply to Vamp
Well, first of all, JS is client-side, so your gonna need to have some sort of server-side language/code. I'd suggest PHP/MySQL since its kinda easy to learn.
You could also use cookies, but I'm not really familiar with that.
Cheers |
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Vamp
5c077
Premium
join:2003-01-28
MD
·Verizon FIOS
| Well I know that but I know nothing about using PHP/MySQL (other than forums)... Cookies wont work because it has to be stored globally not just for that user pref.
So I need a way to save/retrieve values using PHP, but also be able to get those values into Javascript strings (can't use PHP).
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muiredised
ESSE QUAM VIDERI
join:2007-06-11
Tacoma, WA
| reply to Vamp
You may need to brush up on the CGI (common gateway interface) protocol for some background. You will need to choose a server side language that will receive and process the data prior to actually saving it. Perl, PHP, Ruby, Python, and C are all viable choices. (my apologies if I omitted someone's favorite)
Once you have chosen a language you will author a script/program that will receive the data from a client, process it if necessary, and then store it on the server. Choices for storage are many. You can store it in a plain text file, a database, or one of many other formats. For very simple data that needs to be accessible from javascript only then perhaps your server-side script can format the data as javascript and save to a .js file. Then the client code can make an AJAX request for this file, eval it, and update whatever you got going on there on the client side.
The server-side language choice often comes down to a matter of personal preference. The actual storage method should be determined by the sophistication of the application and how the data is going to be used (need search capabilities?).
Typically PHP is thought of as an easy-to-learn server-side language so maybe start there and I'm sure you will find answers to questions as they arise. |
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Vamp
5c077
Premium
join:2003-01-28
MD
·Verizon FIOS
| reply to Vamp
Ok I got PHP reading/writing to a txt file but there is an issue, this cant work because it can't be used in conjunction with Javascript statements... Not willing to rewrite everything (plus some things cant be rewrite as they are linked to another outside script).
Will probably just abandon the project.
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PetePuma
How many lumps do you want
Premium,MVM
join:2002-06-13
Arlington, VA
| If you'd provide some more detail on what's involved perhaps you'd get a better answer. You keep mentioning some existing app (though you say you aren't interested in anything in particular -- I disagree; you have a specific application in mind) but don't provide any details. There is probably a viable solution but the crumbs you're throwing aren't enough. |
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muiredised
ESSE QUAM VIDERI
join:2007-06-11
Tacoma, WA
| reply to Vamp
said by Vamp  :Ok I got PHP reading/writing to a txt file but there is an issue, this cant work because it can't be used in conjunction with Javascript statements... What follows is a solution that is NOT ideal but without any details it is basically a proof of concept for you.
I write a PHP script that takes some user input, processes it, then writes it to a file in the following format:
var a = "user input";
var b = {test1:"more user input",test2:"look at me"};
The PHP script names the file "test.js" and saves in a directory that is accessible via the web. Now in your web page you include Javascript code that makes an AJAX call to »your.website.com/test.js (or wherever you saved it) and it fetches your file as a string. You eval the string and because the string is formatted as Javascript VIOLA!!! you now have data in your client side script that came from the server. Add more Javascript to use that data in whatever manner you wish, add a setTimeout to run the AJAX request at a specified interval and there you go.
I won't harp on the pitfalls of eval and what not. If you've never done anything like this before then you definitely have a learning curve ahead of you. |
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Vamp
5c077
Premium
join:2003-01-28
MD | Wow I never thought of that, that should work... I have experience with storing values in js and property files with Javascript... Just never touched PHP before like I said.
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usa2k
Please PRAY for Rebekah
Premium,MVM
join:2003-01-26
Canton, MI
clubs: |  Re: Saving values on a web server...
Best jump-start I had for PHP was
Here |
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