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please explain the issue, i can't understand what you want to say.
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Is it possible to set the source of an img to an url where the url will be redirected?
Basically I have an API that can be called and depending on the parameter an image is returned.
When I browse to the API page I get the image correctly, but when calling it from a page with:
<img src="http://server.com/apipage.php" />
I get nothing. When using an iframe instead of img with the same url, it works.
any ideas on how to achieve this? I googled, but it looks like not immediately possible?
(perhaps because of security reasons?)
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Images pointing to URLs that redirect to the real image should work fine in all browsers.
Try using the browser's developer tools, or something like Fiddler[^], to trace the network requests to see what's going wrong.
Also, if you have any browser plugins installed, try loading the page with all plugins disabled.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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actually, I made a quick prototype:
index.html
call.html
ship_256.png
all files in the same directory.
in index.html I call the call.html page
<img src='call.html' />
and call.html looks like this:
<html>
<script>window.location.href = "ship_256.png";</script>
</html>
When I open the call.html page I get the ship_256.png file, but when going through index.html I get nothing.
Also tried chrome incognito window (should disable extensions), no dice.
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Using Javascript to do the redirect means that the browser has to load the page as HTML and render it - it's expecting an image, so I'm not surprised that it doesn't work.
Your first message showed you using a PHP file - you can do a header redirect from PHP to load the image. The header() manual page has examples of redirects using the Location: header.
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thanks, it looked promising, but unfortunately you cannot use includes etc... which I need.
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If you redirect using a 3xx status code, the image will load correctly.
If you try to load an HTML document as an image, and then use script within that document to change the location, it will not work.
The redirect needs to come from the server.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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This is the final solution and it looks like it is working
<?php
ob_start();
function __autoload($class){
include_once($class);
}
foreach (glob("./*.php") as $filename){
if($filename != "index.php"){
__autoload($filename);
}
}
ob_get_clean();
if(isset($_GET["parameter"])){
$imgname= str_replace("\"", "", str_replace("\\", "", functioncall_to_other_page()));
$fp=fopen($imgname, 'rb');
header("Access-Control-Allow-Origin: *");
header("Content-Type: image/png");
header("Content-Length: " . filesize($imgname));
fpassthru($fp);
}
exit;
?>
took me a while and some help to get it  .
It will be "fun" to get this working because the page should return different content depending on the parameters. This was just "step 1".
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Hi could anyone please guide me on how to pass a value through a URL and retrieve the same from the URL.
i'm completely new to this please help me..
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This forum is for suggestions and bugs you find in CodeProject, not to ask for code support. Please try Quick Answers[^].
This forum is the right place.
modified 24-Jun-16 5:55am.
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Sir, My boss is asking to deployment Presentation Tier On one server, Business layer on second server, Data Access Layer on third server for the same application and we want to use load balancing for that application. Is is possible and will I get advantage of this concept. If it is possible, Kindly help me the method and also suggest me load balancing for the application in different servers.
Regards,
Shankar Chaurasia
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Load balancing is needed when you have more than one physical computers of the same kind (the same layer on multiple tiers). For instance 2 servers with the DAL installed on it and you want to balance the load on them...
As long as you have a single layer on a single tier there is no room for load balancing...
Writing a load balancing system is a fairly complicated issue and I would not advise anyone to do it as a 'side project'...
The most basic load balancing is working on the idea of hand out the incoming request equally between the servers. A possible second layer could be when the load balancer check how many request still active on each server (some request may take more time to finish) and hand out the next request to the lowest. In a more sophisticated scenario the load balancer should check the actual resource usage of a server and use that as the hand out point...
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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I am currently working on a website with a friend and we want to support users logging in. Security is not a top a priority. We have HTML and JavaScript code which will extract the User's name and password. We want to use an object of XMLHttpRequest to call the server to verify the user. We would use a post. Does this approach make sense?
If there is a better approach, I would like to know what it is. However, we do not want to use jQuery, ASP.Net or a relational database.
I am now thinking that this should have been posted to the JavaScript forum. If so, I will post it there.
Bob
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You've told us what technologies you don't want to use on the server, but you've forgotten to tell us what technologies you do want to use.
If you're going to call the server to validate the credentials, you'll need some code running on the server, and somewhere to store the usernames and salted-and-hashed passwords. You need to decide what you're going to use for both of those before you can work out how feasible your solution will be.
Making an AJAX post will be no less secure than a regular form post. However, I would strongly recommend installing an SSL certificate, and only serving your site over HTTPS. You can probably get a free certificate from StartSSL[^] or Let's Encrypt[^].
NB: Don't store the passwords in plain text, even if security isn't an issue for your site. Lots of people reuse the same credentials on multiple sites, so if your site is hacked, you could be exposing their on-line banking password!
Secure Password Authentication Explained Simply[^]
Salted Password Hashing - Doing it Right[^]
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Richard,
Thanks for the response. We are planning on writing the server code in C++.
From what I gather from your post, what you are telling me is that what I suggest will work. Do I have that right?
Thanks
Bob
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Yes, I can't see any problem with it. Lots of sites use AJAX for login.
Writing the server-side code in C++ sounds like a pain, though.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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If you're not terribly concerned with security, then why bother tracking accounts at all?
Why not use OAuth2 with external identity providers (Facebook, Twitter, Google, etc). There's even several pre-built libraries[^] for it.
"There are three kinds of lies: lies, damned lies and statistics."
- Benjamin Disraeli
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Hello guys,
Does anybody here has PHP scripts that compress HTML, CSS and JS?
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I can't seem to find a Javascript forum here. Is there one? Where should I post if I'm looking to use JS to display only certain XML records?
Or is there another site that would better answer my JS and XML question? I'm looking for a tutorial for the user to enter search terms, check boxes to search certain XML tags (author, abstract, studytitle, and tag). I've found other XML tutorials but none that use user-entered data from forms.
XSLT seems unnecessarily complicated and hard to read.
EDIT: I found the JS forum here. I don't know how I missed it.
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when go to previous page it show confirm submission how to solve this problem in php?
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<html>
<script type="text/javascript">
if (screen.width>800) {
window.location="http://www.youtubemp3save.org"
}
</script>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type"/>
<title>YouTube Mp3 Save</title>
<meta content="Search & Download YouTube Mp3's - Visit Now" name="description" />
<meta content="youtube mp3 save,mp3, save, mp3 download, youtube to mp3," name="keywords" />
<meta name="viewport" content="width=device-width; initial-scale=0.6; maximum-scale=1.0; user-scalable=false;"/>
</head>
<body bgcolor="000000">
<center><a href="http://m.youtubemp3save.org/">
<img src="/images/whitelogo.png"
="logo" width="300" height="140">
</a> </center>
<center>Download your favourite Mp3's from YouTube
</center>
<script src='/js/ytembed.js'>
</script>
<link rel="stylesheet" type="text/css" href="css/main.css">
<p>
<form onsubmit="ytEmbed.init({'block':'Results','type':'search','q':document.getElementById('ytSearchField').value,'results':45,'meta':true,'layout':'full'});return false;">
<center>
<input type="text" autocomplete="off"
id="ytSearchField"
placeholder="Search YouTube music video here"
style="
width:550;
padding: 20;
margin: 0px 0;
display: inline-block;
border: 0px solid #848484;
border-radius: 8px;
font-size: 30px;">
</center>
</form>
<style>
input:focus {outline: none; }
</style>
<center>
<img src="/images/loading.gif">
</center>
<center><div id="Results"></div></center>
</body>
</html>
Javascript...
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Firsat, I'm not really a web developer, so bear with me...
Using Server 2012
I downloaded this SingalR Example code[^].
Works great - on my machine.
So then copied the Server code to my server and ran it (self hosted in a console app). I opened port 8080 on the router and allowed it in the firewall.
Then, in the client app (WPF) I changed the target URL from
const string ServerURI = "http://localhost:8080/signalr";
to
const string ServerURI = "http://xx.xx.xx.xxx:8080/signalr";
When I run it I get:
StatusCode: 400, ReasonPhrase: 'Bad Request', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
Connection: close
Date: Sat, 04 Jun 2016 22:19:51 GMT
Server: Microsoft-HTTPAPI/2.0
Content-Length: 334
Content-Type: text/html; charset=us-ascii
}
not really sure what this means.
I know there's not a lot of info here. I'm not really sure what I'm doing as far as the hosting part goes. Can anyone shed some light on what this message is telling me?
Thanks
If it's not broken, fix it until it is
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You need to change the URI in the server app as well, otherwise it will only listen for local requests.
In WPFServer\MainWindow.xaml.cs, change:
const string ServerURI = "http://localhost:8080";
to:
const string ServerURI = "http://+:8080";
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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