how to display firebase storage img - firebase

According to this
After you have a URL for example:
http://storage.googleapis.com/example-bda7b.appspot.com/images/someone-Lopez.jpg
You would still need to run getDownloadURL, something like this:
storageRef.child(urll).getDownloadURL()
This seems counter productive to me, if you already have the image storage url, why need to run getdownload url and wait for a response?
I've set my storage to public. How would I be able to execute something like (in react):
<img
alt={props.data.last}
className="rounded-circle"
src={http://storage.googleapis.com/example-bda7b.appspot.com/images/someone-Lopez.jpg}
/>
Is something like the above example even possible? or
var storage = firebase.storage();
var pathReference = storage.ref('images/stars.jpg');
<img
alt={props.data.last}
className="rounded-circle"
src={pathReference}
/>
Firebase gives this example in the documentations but doesn't actually give any ideas of how to incorporate it.
// Create a reference with an initial file path and name
var storage = firebase.storage();
var pathReference = storage.ref('images/stars.jpg');

This will help you to show image
<script>
function showimage() {
var storageRef = firebase.storage().ref();
var spaceRef = storageRef.child('sweet_gift/vytcdc.png');
storageRef.child('images/stars.jpg').getDownloadURL().then(function(url) {
var test = url;
alert(url);
document.querySelector('img').src = test;
}).catch(function(error) {
});
}
</script>
<input type="button" value ="view Image" id="viewbtn" onclick="showimage();">
<img src="test" height="125px" width="200px"/>
if you try to open image with this link it won't open instead it will provide you json data. You have to provide the downloadTokens of image then it will show. that's why you have to perform the getDownloadUrl() which will generate proper url of image with downloadTokens and alt.
You can check the alert you see full url.

Related

Pull URL parameters into a WordPress "Raw HTML" content element

I'm using the URL Params plugin to pull parameters into regular content using a short code. But I have to use a Raw HTML block to insert Typeform code into the page and I want to be able to pass a URL parameter into the Typeform code to track the source of the form submission.
I can't figure out how to do it. The form is working fine at: https://HelloExit.com/instant-valuation
But I want to be able to send people to https://HelloExit.com/instant-valuation/?source=XXXX and pull the XXXX into the Typeform code as the "source" value in the "data-url"
Here's what I tried:
<script>
function getUrlVars() {
var vars = {};
var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
vars[key] = value;
});
return vars;
}
var source = getUrlVars()["source"];
</script>
<div
class="typeform-widget"
data-url="https://xgenius.typeform.com/to/zZHPPk?source=<script>document.write(source)</script>"
data-transparency="100"
data-hide-headers=true
data-hide-footer=true
style="width: 100%; height: 500px;">
</div>
<!-- Typeform embed code -->
<script>(function() { var qs,js,q,s,d=document, gi=d.getElementById,
ce=d.createElement, gt=d.getElementsByTagName, id="typef_orm",
b="https://embed.typeform.com/"; if(!gi.call(d,id)) { js=ce.call(d,"script"); js.id=id;
js.src=b+"embed.js"; q=gt.call(d,"script")[0]; q.parentNode.insertBefore(js,q) } })()
</script><div style="font-family: Sans-Serif;font-size: 12px;color: #999;opacity: 0.5;padding-top: 5px;"> powered by Typeform</div>
Any assistance would be greatly appreciated!
You're close, but you'll need to use Javascript to alter the data-url attribute of your div.
// ...
var source = getUrlVars()["source"];
// concatenate the url with your source variable
var newUrl = `https://xgenius.typeform.com/to/zZHPPk?source=${source}`;
// get the element whose attributes you want to dynamically set
// https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector
var widgetElement = document.querySelector('.typeform-widget');
// set the source attribute
// https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute
widgetElement.setAttribute('data-url', newUrl);
Test this carefully, as it might still end up with a race condition (that is, the Typeform embed code might start running before you've updated the data-url attribute that it references).

From firebase storage download file to iframe

With below code, I can not download image to iframe. Instead, it downloaded to local drive.
in JS:
storageRef.child('images/CopyPerson.jpg').getDownloadURL().then(function(url) {
var iframe1 = document.getElementById('downloadedCourse');
iframe1.src = url;
}).catch(function(error) {
// Handle any errors
});
in html:
<iframe id="downloadedCourse" width="800" height="500" src=""></iframe>
However, if I use img instead of iframe, it works as supposed. The reason I need use iframe is because I intend to download pdf file. Anyone knows why?
I presume that this is because the content-disposition header is set to attachment instead of inline. Try setting the metadata to change this and see if that works:
// Obviously you only have to set the metadata once per file
// Not every time you download the URL
storageRef.child('images/CopyPerson.jpg').updateMetadata({
"contentDisposition": "inline"
}).then(function() {
return storageRef.child('images/CopyPerson.jpg').getDownloadURL()
}).then(function(url) {
var iframe1 = document.getElementById('downloadedCourse');
iframe1.src = url;
});

Authorization of alfresco user while calling webscript inside IFrame

I'm developping a component to easily edit associations in document properties pages.
The visual part of the component is an IFRAME showing the myspaces webscript.
I'm having difficulties to transfer user authentication to the content of the IFRAME. The session is lost, so the browser ask for a new BasicAuthentication.
I can transfer the ticket using the alf_ticket url parameter, but it is not reused for other urls produced by the webscript.
How could I transfer the Alfresco authentication to the webscript included in the IFRAME ?
<script type="text/javascript">
var self = this;
var ticket;
var xmlHttpReq = false;
// Mozilla/Safari
if (window.XMLHttpRequest) {
self.xmlHttpReq = new XMLHttpRequest();
}
// IE
else if (window.ActiveXObject) {
self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
}
self.xmlHttpReq.open("GET", "http://blrkec335927d:8080/alfresco/wcservice/api/login?u=admin&pw=admin", true);
self.xmlHttpReq.setRequestHeader('Content-Type', 'json');
self.xmlHttpReq.setRequestHeader('X-Alfresco-Remote-User', 'admin');
xmlHttpReq.onreadystatechange = function() {//Call a function when the state changes.
alert(xmlHttpReq.status);
if (xmlHttpReq.readyState == 4 && xmlHttpReq.status == 200)
{
var xml = xmlHttpReq.responseXML;
var getticket = xml.getElementsByTagName("ticket");
ticket = getticket[0].childNodes[0].nodeValue
var url1 = "http://blrkec335927d:8080/alfresco/wcservice/ui/myspaces?f=0&p=%2FCompany%20Home&alf_ticket="+ticket;
var aa='<iframe bgcolor="#edf6fc" width="100%" height="100%" frameborder=0 src="'+url1+'" />';
document.getElementById('uploaddoc').innerHTML = aa;
}
}
self.xmlHttpReq.send();
</script>
<body>
<span id="pageTitle">${label['ALFRESCO_DOCUMENT']}</span>
<div id="uploaddoc">
</div>
</body>
<span id="footerButtons" style="vertical-align: bottom;"></span>
I am using above code . But still while loading page its asking for username and password. Please help me
First of all, don't use an iFrames for a simple webscript. You're not loading an entire new page which should have his own session.
Just use Client-Side JavaScript to get the JSON backend data en draw your own UI.
In any case you're compelled to use an iFrame, then just create your own myspaces webscript. Copy all the content, rename it and add your alf_ticket behind every generated url.

Adding Firebase VAR to website

I setup and account at http://feedthefire.in and on Firebase dot com - to manage feeds I would liek to display on my site. I set everything up and the feeds get pulled into Firebase just like it should, now its time to add it to a web page...nothing, can't get the feeds to pull in from Firebase. I added the firebase.js reference in the header and in the body I placed
<script type="text/javascript">
var ref = new Firebase"'https://aodf.firebaseio.com");
ref.child("meta").once("value", function(snapshot) {
$("#e-title").html(snapshot.val().description);
});
ref.child("articles").limit(3).on("child_added", function(snapshot) {
var article = snapshot.val();
var link = $("<a>", {
"href": article.link,
"target": "_blank"
});
$("#e-list").append($("<li>").append(link.html(article.title)));
});
when you go to http://sandbox.studiorooster.com/ao I should see a list of feeds, but I don't, so I know I am supposed to place something else in the code; I think :)
There are a number of problems in what you posted above, each of which is explained below:
Syntax error on line #2: var ref = new Firebase("https://aodf.firebaseio.com");
You're loading a description on lines #3-5, but never rendering it, because there is no element with id e-title in the page you linked to. Trying adding <h2 id="e-title"></h2> to your template.
Similarly, you are loading a number of articles on lines #6-13, and trying to append each of these items to a list with id e-list, which also does not exist in your template. Try adding <ul id="e-list"></ul> to your template.
Hope that helps!

Best way to retrieve image from server using ajax [duplicate]

Is it possible to reload an image with an identical file name from a server using jQuery?
For example, I have an image on a page, however, the physical image can change based on user actions. Note, this does not mean the file name changes, but the actual file itself.
ie:
User views image on default page
User uploads new image
Default image on page does not change(I assume this is due to the file name being identical, the browser uses the cached version)
Regardless of how often the code below is called, the same issue persists.
$("#myimg").attr("src", "/myimg.jpg");
In the jQuery documentation, the "load" function would be perfect if it had a default method of firing the event as opposed to binding a callback function to a successful/complete load of an element.
Any assistance is greatly appreciated.
It sounds like it's your browser caching the image (which I now notice you wrote in your question). You can force the browser to reload the image by passing an extra variable like so:
d = new Date();
$("#myimg").attr("src", "/myimg.jpg?"+d.getTime());
It's probably not the best way, but I've solved this problem in the past by simply appending a timestamp to the image URL using JavaScript:
$("#myimg").attr("src", "/myimg.jpg?timestamp=" + new Date().getTime());
Next time it loads, the timestamp is set to the current time and the URL is different, so the browser does a GET for the image instead of using the cached version.
This could be one of the two problems you mention yourself.
The server is caching the image
The jQuery does not fire or at least doesn't update the attribute
To be honest, I think it's number two. Would be a lot easier if we could see some more jQuery. But for a start, try remove the attribute first, and then set it again. Just to see if that helps:
$("#myimg").removeAttr("src").attr("src", "/myimg.jpg");
Even if this works, post some code since this is not optimal, imo :-)
with one line with no worries about hardcoding the image src into the javascript (thanks to jeerose for the ideas:
$("#myimg").attr("src", $("#myimg").attr("src")+"?timestamp=" + new Date().getTime());
To bypass caching and avoid adding infinite timestamps to the image url, strip the previous timestamp before adding a new one, this is how I've done it.
//refresh the image every 60seconds
var xyro_refresh_timer = setInterval(xyro_refresh_function, 60000);
function xyro_refresh_function(){
//refreshes an image with a .xyro_refresh class regardless of caching
//get the src attribute
source = jQuery(".xyro_refresh").attr("src");
//remove previously added timestamps
source = source.split("?", 1);//turns "image.jpg?timestamp=1234" into "image.jpg" avoiding infinitely adding new timestamps
//prep new src attribute by adding a timestamp
new_source = source + "?timestamp=" + new Date().getTime();
//alert(new_source); //you may want to alert that during developement to see if you're getting what you wanted
//set the new src attribute
jQuery(".xyro_refresh").attr("src", new_source);
}
This works great! however if you reload the src multiple times, the timestamp gets concatenated to the url too. I've modified the accepted answer to deal with that.
$('#image_reload_button').on('click', function () {
var img = $('#your_image_selector');
var src = img.attr('src');
var i = src.indexOf('?dummy=');
src = i != -1 ? src.substring(0, i) : src;
var d = new Date();
img.attr('src', src + '?dummy=' + d.getTime());
});
Have you tried resetting the image containers html. Of course if it's the browser that is caching then this wouldn't help.
function imageUploadComplete () {
$("#image_container").html("<img src='" + newImageUrl + "'>");
}
Some times actually solution like -
$("#Image").attr("src", $('#srcVal').val()+"&"+Math.floor(Math.random()*1000));
also not refresh src properly, try out this, it worked for me ->
$("#Image").attr("src", "dummy.jpg");
$("#Image").attr("src", $('#srcVal').val()+"&"+Math.floor(Math.random()*1000));
Using "#" as a delimiter might be useful
My images are kept in a "hidden" folder above "www" so that only logged users are allowed access to them. For this reason I cannot use the ordinary <img src=/somefolder/1023.jpg> but I send requests to the server like <img src=?1023> and it responds by sending back the image kept under name '1023'.
The application is used for image cropping, so after an ajax request to crop the image, it is changed as content on the server but keeps its original name. In order to see the result of the cropping, after the ajax request has been completed, the first image is removed from the DOM and a new image is inserted with the same name <img src=?1023>.
To avoid cashing I add to the request the "time" tag prepended with "#" so it becomes like <img src=?1023#1467294764124>. The server automatically filters out the hash part of the request and responds correctly by sending back my image kept as '1023'. Thus I always get the last version of the image without much server-side decoding.
Based on #kasper Taeymans' answer.
If u simply need reload image (not replace it's src with smth new), try:
$(function() {
var img = $('#img');
var refreshImg = function(img) {
// the core of answer is 2 lines below
var dummy = '?dummy=';
img.attr('src', img.attr('src').split(dummy)[0] + dummy + (new Date()).getTime());
// remove call on production
updateImgVisualizer();
};
// for display current img url in input
// for sandbox only!
var updateImgVisualizer = function() {
$('#img-url').val(img.attr('src'));
};
// bind img reload on btn click
$('.img-reloader').click(function() {
refreshImg(img);
});
// remove call on production
updateImgVisualizer();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<img id="img" src="http://dummyimage.com/628x150/">
<p>
<label>
Current url of img:
<input id="img-url" type="text" readonly style="width:500px">
</label>
</p>
<p>
<button class="img-reloader">Refresh</button>
</p>
I may have to reload the image source several times. I found a solution with Lodash that works well for me:
$("#myimg").attr('src', _.split($("#myimg").attr('src'), '?', 1)[0] + '?t=' + _.now());
An existing timestamp will be truncated and replaced with a new one.
If you need a refresh of the exact URL and your browser has the image cached, you can use AJAX and a request header to force your browser to download a new copy (even if it isn't stale yet). Here's how you'd do that:
var img = $("#myimg");
var url = img.attr("src");
$.ajax({
url: url,
headers: { "Cache-Control": "no-cache" }
}).done(function(){
// Refresh is complete, assign the image again
img.attr("src", url);
});
Nothing else worked for me because while appending a token to the query string would download the new image, it didn't invalidate the image in the cache at the old URL so future requests would continue to show the old image. The old URL is the only one sent to the browser, and the server was directing the client to cache the image for longer than it should.
If this still doesn't refresh the image for you, see if this answer helps. For more information, here is documentation on the Cache-Control request header.
In the html:
foreach (var item in images) {
<Img src="#Url.Content(item.ImageUrl+"?"+DateTime.Now)" >
}
I simply do this in html:
<script>
$(document).load(function () {
d = new Date();
$('#<%= imgpreview.ClientID %>').attr('src','');
});
</script>
And reload the image in code behind like this:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
image.Src = "/image.jpg"; //url caming from database
}
}

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