I am building a web app and I am using Firebase to store my user's data in Cloud Firestore. There is a page on my web app that allows users to view their documents from Cloud Firestore. I would like to add a query parameter to the end of my URL on view.html so I can take that query parameter value and use it to search for a document.
I have been searching online to find possible solutions. So far I have come across a few videos on the topic, but they haven't been going into the depth I have been needing. For example, this video shows how to add and get query parameters from a URL, but it only shows how to log those changes in the console. How would I make that my URL?
I've also be browsing Stackoverflow for solutions. This Stackoverflow post asks a similar question, however, many of the solutions in the answers causes view.html to reload on a loop. Why would this be, and if this is a possible solution, how would I stop this from happening.
How would I go about appending and fetching URL query parameters in Javascript?
You say you want to do this in javascript, so I assume the page itself is building/modifying a link to either place on the page or go to directly via javascript.
In javascript in the browser there is the URL object, which can build and decompose URLs
let thisPage = new URL(window.location.href);
let thatPage = new URL("https://that.example.com/path/page");
In any case, once you have a URL object you can access the parts of it to read and set the values.
Adding a query parameter uses the searchParams attribute of the URL, where you can add parameters with the .append method — and you don't have to worry about managing the ? and & … the method takes care of that for you.
thisPage.searchParams.append('yourKey', 'someValue');
This demonstrates it live on this page, adding search parameters and displaying the URL at each step:
let here = new URL(window.location.href);
console.log(here);
here.searchParams.append('firstKey', 'theValue');
console.log(here);
here.searchParams.append('key2', 'another');
console.log(here);
I have solved this issue in the simplest way. It slipped my mind that I could link to view.html by adding the search parameter to the URL. Here's what I did:
On index.html where I link to view.html, I created the function openViewer();. I added the parameter to the end of URL href.
function openViewer() {
window.location.href = `view.html?id={docId}`;
}
Then on view.html, I got the parameter using URLSearchParameters like so:
const thisPage = new URL(window.location.href);
var id = thisPage.searchParams.get('id');
console.log(id)
The new URL of the page is now "www.mysite.com/view.html?id=mydocid".
You can try to push state as so in the actual view.html
<script>
const thisPage = new URL(window.location.href);
window.history.pushState("id","id",thisPage);
</script>
Related
This is how my site is constructed...
articles.php contains the layout html to display all articles for a category.
articles.js contains the control elements to obtain db query results and pass to articles.php page. Within the js script is a dataTable that is displayed on the articles.php page.
ajax_articles.php contains the query request and return json file results of the query. Within the json file are links to the individual articles. The link is structured as a clean SEO URL (e.g., article/001/moby_dick).
This is how I understand htaccess to work.
When a user selects an article the URL (i.e., https://www.example.com/article/001/moby-dick) is passed through htaccess and with a RewriteRule ^article/([0-9]+)/([a-z_-]+) article.php?art_id=$1&art_name=$2 [NC,L] will display the SEO 'pretty' URL, BUT known to the system will be the URL containing the two parameters that can be used by a $_GET to obtain the two parameters. IS MY UNDERSTANDING OF THE PROCESS CORRECT?
I've noticed that with the htaccess I now have to use the full path name to load the support (.js) and graphic files. Further, I cannot obtain the variables via js $_GET.art_id and $_GET.art_name.
Any assistance is greatly appreciated.
You can't access the GET variables with javascript in this configuration because they do not exist after the URL rewrite. The query parameters have been removed.
There are still ways you can extract these values from the URL with window.location.href and the .split() method in javascript.
// var myurl = window.location.href; // this will get the string of your current URL. Used manual string in this example
var myurl = "https://www.example.com/article/001/moby-dick"; // manual URL for sake of an executable example
var spliturl = myurl.split("/"); // ["https:","","example.com","article","001","moby-dick"]
var articleid = spliturl[4]; // "001"
var articlename = spliturl[5]; // "moby-dick"
// see the variables in action
console.log("id: ", articleid);
console.log("name: ", articlename);
I am facing issue in angular js, right now we have two urls in our application,
http://localhost/xyz?page=documents&view=grid&sortorder=desc&sortby=updatedate&limit=35&offset=0
and then we another url
http://localhost/abc
When i move from the first url to the second url it carries the query params from the first url, this is how the second url looks like
http://localhost/abc?page=documents&view=grid&sortorder=desc&sortby=updatedate&limit=35&offset=35
We don't the fetch url carrying the query params from the first page. I am new to angular js, I have came across few options like
$location.search({});
$location.url($location.path())
But those didn't work at all.
I think i know what you mean, to remove parameters use
$location.url($location.path());
Hope it helps
Check this documentation for the location with angular
1.Save the query object $location.search()in some place (local storage or cookies), then in the target controller $.map(query,funcion(k,v){ $location.search(k,v});
2.Dynamically append to the end url2 + $location.path() in href attribute
$location.url changes path, search and hash.
So, $location.url('new_path') should work!
let's say one of my urlpatterns looks like this.
url('^objects/update/(?P<pk>\d+)$', views.UpdateView.as_view(), name = 'update-object'),
I need to redirect user to the update page depending on the selected object (the list of objects is populated using Ajax). So I'd like to pass that named url pattern to the JavaScript, in order to build the actual url on the client side.
Example of what I want to achieve:
pass the name 'update-objects' to the function
get the actual url pattern, replace (?P<pk>..) with {pk}
pass the result to the javascript, resulting in : objects/update/{pk}
any tips?
thanks
to make it more clear: at the moment of rendering, I can't do url reverse because the PK is not known yet. I need to make kind of javascript-urlpattern which will later be converted to the real url (i.e. my JS code will replace {pk} part with the actual pk value)
The actual URL reversing must happen on the server side. There are several ways to do this, and the most elegant of these probably depends on how exactly your script and markup are set up for this. One thing I've done recently is to attach the URL to a logical element using HTML5 data attributes, which are easy to retrieve using jQuery. If you're not using jQuery, I'll leave it up to you to translate to pure JS. You haven't provided any code or specifics for your client-side, so I'm kind of shooting in the dark here, but maybe this will give you the idea:
Django HTML template:
<ul class="object-list">
{% for object in objectList %}
<li data-update-url="{% url update-objects object.pk %}">object.name</li>
{% endfor %}
</ul>
JS:
$('.object-list').on('click', 'li' function () {
var updateUrl = $(this).data('update-url')
...
});
It sounds like you need to make an additional ajax call once the object has actually been selected. Don't try and second guess your url.conf by trying to work out the url on the client side - you'd just be making trouble for yourself later. Wait till you can get a pk, then use django's reverse function to give you your url (doing anything else violates DRY).
How about creating a simple view that returns the url -
from django.core.urlresolvers import reverse
from django.http import HttpResponse, HttpResponseBadRequest
def get_url(request):
if request.is_ajax() and request.method == 'POST':
obj_id = request.POST['obj_id']
url = reverse('object-update', kwargs{'pk': obj_id})
return HttpResponse(obj_id)
return HttpResponseBadRequest()
Then write a javascript function that gets the url using an ajax call to your new view and then redirects. You'd call this function as soon as the object's been selected. I would suggest using JQuery to do this, pure javascript will require you to write more code, and probably write browser specific code (depending on your target). Also it supports dealing with django's csrf protection (you'll need to implement this for ajax calls if you haven't already).
var redirect = function(obj) {
$.ajax({
url: '/your-get-url-view/',
method: 'post',
data: {'obj_id': obj},
success: function(url){
window.location = url;
}
});
}
I'm afraid I don't know how you're getting from the selected object to the pk (For simplicity I've assumed it's available to the redirect function) - you may have to do some processing in the view to get there.
I haven't tested the above code, but it should give you an idea of what I'm suggesting.
Try this one:
Reverse method for generating Django urls
https://github.com/mlouro/django-js-utils
One more
https://github.com/Dimitri-Gnidash/django-js-utils
If you have a URL that only has one PK field in it, you could resolve it with any number (e.g. 0), then substitute the number as required.
In my scenario my URL had a pk then an upload_id, so I had to replace on the right most instance of a 0, with <upload_id>, which the JS would replace this string occurance as required:
detele_url_upload_id_0 = reverse(f'{APP_NAME}:api_upload_delete', args=[pk, 0])
prefix, suffix = detele_url_upload_id_0.rsplit('0', 1)
context['generic_delete_url'] = prefix + '<upload_id>' + suffix
Then in the JS:
const deleteUrl = genericDeleteUrl.replace('<upload_id>', uploadId)
I am calling another application context from window.showModalDialog but confused with following work. Same code to pass parameter within showModalDialg.
var myArguments = new Object();
myArguments.param1 = "Hello World :)";
window.showModalDialog("java2sTarget.html", myArguments, '');
and i can read these myArguments(parameters) in generated HTML using following code:
<script>
document.write(window.dialogArguments.param1);//Hello World :)
</script>
I can't use query string & i am sending myArguments(parameter) because i want to hide parameter from Application user.
Now i am calling servlet from showModalDialog(..)
onclick="window.showModelDialog('http://localhost:7778/app/servlet/test',myArguments,'');"
onclick="window.showModelDialog('http://localhost:7778/app/servlet/test',myArguments,'');"
But as per my knowledge
Servlet --> Servlet container --> HTML+JS+CSS
so JS will be available at last phase, but i want to use in first phase(Servlet).
Now, i need to make some Decision in servelt code based on myArguments(parameter).
is there any way to read these myArguments(parameters) in servlet code?
Pass it as a request parameter in the query string.
var queryString = "param1=" + encodeURIComponent("Hello World :)");
onclick="window.showModelDialog('http://localhost:7778/app/servlet/test?' + queryString, myArguments, '');"
No, there's no other alternative. The request URL is not visible in the modal dialog anyway.
As main objective is to hide query string from User to avoid misuse of those parameters.
I tried following work around.
Developers send hidden parameters to get relative information form source(e.g.:DataBase). And we also know that we can send hidden information in Window.showModalDialog using dialogArguments
Work Around:
(i) I got relative information from server one-step before calling Window.showModalDialog using jQuery.getJSON()
(ii) i used google-gson API at servlet side to convert JavaBeans into Json strings.Solution 1 Solution 2
(iii) Convert JSON into javascript object using jQuery.parseJSON
var args = jQuery.parseJSON(json);
window.showModalDialog("pages/"+args.pageName, args, '');
i used args.pageName to make things dynamic
Please suggest improvements in this work-around. Thanks
I want to redirect after a successful ajax request (which I know how to do) but I want to pass along the returned data which will be used to load an iframe on the page I just redirected to.
What's the best way to pass such data along and use it to open and populate an iframe in the page I just redirected to?
EDIT:
I am passing a GET variable but am having to use the following to access it for use in my iframe src attribute:
function $_GET(q,s) {
s = (s) ? s : window.location.search;
var re = new RegExp('&'+q+'=([^&]*)','i');
return (s=s.replace(/^\?/,'&').match(re)) ? s=s[1] : s='';
}
var d = $_GET('thedata');
I assume there isn't really a more straightforward way to access the GET vars?
If it's not too much data, you could pass it as a get parameter in the redirect:
document.location = "/otherpage?somevar=" + urlescape(var)
Remember that urls are limited to 1024 chars, and that special chars must be escaped.
If it is beyond that limit your best move is to use server side sessions. You will use a database on the server to store the necessary information and pass a unique identifier in the url, or as a cookie on the users computer. When the new page loads, it can then pull the information out of the database using the identifier. Sessions are supported in virtually every web framework out of the box.
Another alternative may be to place the data as a hidden attribute in a form which uses the post method (to get around the 1024 char limit), and simulating a submission of the form in javascript to accomplish the redirect, including the data.