I have a page with an html form. A third party application appends a hidden input in the form. How can i read this hidden input in my server side?
Alterantive, cause i dont know exactly the name of the hidden input, I want to be able to read the whole form in the server and then parse it. Is this possible?
I am using JSF and Java managed beans in the server side.
I have seen similar posts but nothing really helped me.
I am really newbie in Javascript , Ajax etc. so please be as much explanatory as possible :)
Thnx
I want to be able to read the whole form in the server and then parse it.
Essentially, your question boils down to How do I read all request parameters in JSF?, right?
Well, basically as follows:
Map<String, String[]> paramValues = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterValuesMap();
for (Entry<String, String[]> entry : paramValues.entrySet()) {
String name = entry.getKey();
for (String value : entry.getValue()) {
System.out.printf("Parameter: %s = %s%n", name, value);
}
}
Related
For my app I want to store the usernames that are entered into the local appdata.
I do not know how to store the value that is entered in the textbox from the webview to the localdata. Looking across the internet I also could not find any right answer.
I have read InvokeScriptAsync is a method that is used for this kind of things but there's not instruction on how to use it in my case.
I hope someone will have a solution for me.
Thanks in advance!
You can use InvokeScriptAsync to both inject javascript and retrieve html from WebView.
Here is the code to retrieve text entered by user in the WebView. Let consider username is the id of html input field and you want to retrieve what ever the text entered into that input by user.
string username = await MyWebView.InvokeScriptAsync("eval", new string[] { "document.getElementById('username').value;" });
This should called on NavigationCompleted callback method of WebView.
I have a express route;
router.get('/uni/:queryst', function (req, res) {
var choice = req.params.queryst);}
Where basically I use the queryst value from the URL to use it to query something in my database. On the front end, I need to have an input field where the user types the choice and hits submit and then it translates to something like /uni/valuehere on the browser and sending GET to express where it gets caught by the router I wrote above. I don't know how can I make the input field of HTML turn into a URL of the format /uni/valuehere .
As for testing the code initially I was directly typing the URL manually with the value I intended to verify to check if the data passed. Well, users are not going to type URL's directly to search, they will need a form and that is what I can't get my head around to how to turn the input field into a URL in a format /uni/WhateverTheUserHasTypedInTheFieldShouldAppearHere
Thanks in advance for the help. I am self learning the MEAN stack and have come a long way. I need support of experienced developers as I am currently stuck here.
While sending the request write (in controller):
$http.get('/uni/'+queryst).success(function(response){
// Write code using response
});
While on the server side write:
$http.get('/uni/:queryst',function(req,res){
var choice= req.params.queryst
// Code ....
});
i'm quite new to javascript/jQuery/Json. i'm building myself a local app ( no client side for now). right now i have a simple form (inputs and submit) and would like to get the inputs from the user with javascrip/JQuery and then build a JSON object and store it on a file. i managed to get the inputs using jQuery ,and using JSON.strigify() i have a JSON object. only thing is that i dont know how to write to a file with JS. i searched for a solution and understand that i might need to use PHP for that as JS is not meant for changing files.
here is my code:
HTML form:
<form name="portfolio" id="portfolio" method="post" onsubmit="getform()">
<p>General</p>
Portfolio Name: <input type="text" id="portfolioName" name="portfolioName"><br>
Owner First Name: <input type="text" id="ownerFName" name="ownerFName"><br>
Owner Last Name: <input type="text" id="ownerLName" name="ownerLName"><br>
<p>Risk Management</p>
%stocks : <input type="text" id="stocksPerc" name="stocksPerc"><br>
<input type="submit" value="submit">
</form>
JS code
function getform() {
var portfolioName = document.portfolio.portfolioName.value;
var ownerFname = document.portfolio.ownerFName.value;
var ownerLname = document.portfolio.ownerLName.value;
var stocksPerc = document.portfolio.stocksPerc.value;
var myJsonObject =JSON.stringify({
"general": {
"portfolioName": portfolioName,
"ownerFname": ownerFname,
"ownerLname": ownerLname
},
"riskManagement": {
"stocksPerc": stocksPerc
}
});
alert(myJsonObject);
event.preventDefault();
};
now in "myJsonObject" i have the JSON object which i would like to write to a local file.
later on i would like to read this file ,and maybe update some of the values there.
can someone please help me understand how do i write it to a file ?
you can try and load this page which runs my code. hope it works for you.
note: programming is my area of interest but i didnt study it ,i'm learning all by myself so i'm sorry if i askqdo things that make you blind for a moment :). also this is the first question i post here ,feel free to say if i need to improve.
Thanks
Sivan
update + clarification : Thanks for the answers guys ,localStorage is something i didnt know about. from what i understand about localStorage its only good for working in a single domain/location. (i encountered this question on site). what if i want the option of running the app from different locations - lets say there will be only one person updating the JSON data, no need for sync/lock and stuff like that. right now my files (JS,JSON..) are saved in dropbox ,this is how i can use the app from different locations today , i dont have any other server.
2'nd update : i tried the localStorage solution i've been offered and even though its a great capability ,its not exactly what i'm looking for since i need the JSON data available in more then one location (i'll be using my desktop and my laptop for instance).
i'd be glad if you have other suggestions.
Thanks Again.
Check out the HTML5 localStorage API. You will be able to store your JSON objects there and retrieve them. They will be stored as key-value pairs. You can't write to a file using JS AFAIK.
Don't use a file as storage, use localStorage: http://diveintohtml5.info/storage.html. If you need to save information on a session scope, you should use sessionStorage, mind though that the latter is not persistant.
An example of how you would use it:
var item = {
"general": {
"portfolioName": portfolioName,
"ownerFname": ownerFname,
"ownerLname": ownerLname
},
"riskManagement": {
"stocksPerc": stocksPerc
}
}
// set item, you should think up of a unique key for each item
localStorage.setItem('your-key', item);
// remove it if no longer needed, you don't have a lot of space
localStorage.removeItem('your-key');
Saving files is possible in some browsers but this will probably be removed in the future - so I wouldn't use it unless you must.
This article shows how to -
http://updates.html5rocks.com/2011/08/Saving-generated-files-on-the-client-side
You can post the json to a server and use the server to generate a download file (ask a new question if thats what you seek)
and finally - are you sure you want to save to file? if all you want is to save and restore data then there are better alternatives (such as localStorage, cookies, indexDb)
I am writing a gadget for Jira with some configuration options. One of these configuration options is a "project or filter picker".
My problem lies in the part, when I want to reconfigure the gadget's preferences. I have read the code of the timesince-gadget as an example and I think the relevant part is the following:
if (/^jql-/.test(gadget.getPref("projectOrFilterId"))){
projectAndFilterPicker =
{
userpref: "projectOrFilterId",
type: "hidden",
value: gadgets.util.unescapeString(this.getPref("projectOrFilterId"))
};
} else {
projectAndFilterPicker = AJS.gadget.fields.projectOrFilterPicker(gadget, "projectOrFilterId", args.options);
}
Basicly I've copied the code from the timesince-gadget. Unfortunately even if already configured, the javascript always enters the else part.
A problem is, that I ve no experience with jql and don't totally understand the if clause.
But usually (e.g. when calling the rest api and processing the config infos)
gadget.getPref("projectOrFilterId")
returns a string containing the id of the picked project or filter.
Question is now: How can I make my gadget remember the last configuration like it's done with some many other Jira gadgets?
I really hope anyone can help me with that.
It turnes out, the answer is even simplier then I thought.
First: In the descriptor you can totally forget the if part from above. Just
var projectAndFilterPicker = AJS.gadget.fields.projectOrFilterPicker(gadget, "projectOrFilterId", args.options);
is needed.
Second: Retrieve the project's or filter's name in your rest resource, which shouldn't be a problem, since you already want to use the processed id. Then return this name back to the view part of your javascript and type in something like
this.projectOrFilterName = args.myrestclasskey.projectOrFilterName;
And tada: reconfiguration will display the old configured name!
I had this problem once when I forgot to specify the option in the Gadget XML file. I solved it by adding this to the XML:
<UserPref name="projectOrFilterId" datatype="hidden"/>
I am a real noob when it comes to javascript/ajax, so any help will be very appreciated.
In reference to this question:
Updating a MySql database using PHP via an onClick javascript function
But mainly concerned with the answer left by Phill Sacre. I am wondering if someone could elaborate on how we are(if we can?) passing values/data through his example, using jquery.
The code example left by him is as follows:
function updateScore(answer, correct) {
if (answer == correct) {
$.post('updatescore.php');
}
}
...
<a onclick="updateScore(this, correct)" ...> </a>
Say for example, we are wanting to pass any number of values to the database with php, could someone give me a snippet example of what is required in the javascript function? Or elaborate on what is posted above please?
Thanks again all.
The simplest example I can think of is this. Make your AJAX call in your if block like this:
$.get('updatescore.php', {'score': '222'}, function(d) {
alert('Hello from PHP: ' + d);
});
On your "updatescore.php" script, just do that: update the score. And return a plain text stating wether the update operation was successful or not.
Good luck.
P.S.: You could also use POST instead of GET.
What you would do is on the php server side have a page lets say its update.php. This page will be visited by your javascript in an Ajax request, take the request and put it in a database.
The php might look something like this:
<?php
mysql_connect(...)
mysql_query("INSERT INTO table
(score) VALUES('$_GET["score"]') ")
Your javascript would simply preform an ajax request on update.php and send it the variables as get value "score".
Phil is not passing any values to the script. He's simply sending a request to the script which most likely contains logic to 'update' the score. A savvy person taking his test though could simply look at the HTML source and see the answer by checking to see what the anchor is doing.
To further nitpick about his solution, a set of radio buttons should be used, and within the form, a button or some sort of clickable element should be used to send the values to the server via an ajax request, and the values sent to the server can be analyzed and the status of the answer sent back to the page.
Since you're using jQuery, the code can be made unobtrusive as seen in the following example:
$('#submit_answer').click(function() {
var answer = 'blah' // With blah being the value of the radio button
$.get('updatescore.php',
{'value': answer},
function(d) {
alert('Your answer is: ' + d') // Where d is the string 'incorrect' or 'correct'
}
});
Enjoy.