I'm trying to implement simple logic so that whatever page a user is on in a site is where the user will get redirected back to after login. To do that it seems I need an easy way to get the relative url of the current request.
I tried using the full url with a link like this in my _LoginPartial.cshtml:
<a asp-controller="Login" asp-action="Index" asp-route-returnUrl="#Context.Request.GetEncodedUrl()">Log in</a>
but that results in an error:
A URL with an absolute path is considered local if it does not have a host/authority part. URLs using virtual paths ('~/') are also local.
Seems like there should be a simple built in method for getting the current relative url. Am I missing something or do I need to implement my own extension method for this? I'm using RC1
Do you mean Context.Request.Path?
I quickly made a sample project with a HomeController, an Index.cshtml and a Second.cshtml. The Second.cshtml looks like:
#addTagHelper "*, Microsoft.AspNet.Mvc.TagHelpers"
<h1>#ViewBag.Title</h1>
<a asp-controller="Home" asp-action="Index" asp-route-returnUrl="#Context.Request.Path">Log in</a>
And the anchor tag renders to the browser as (tested with Chrome dev tools):
Log in
You have Request.Query and/or Request.QueryString to concatenate the full URL.
You could make an extension method on the HttpRequest class to for instance return the Path and the QueryString together if you wish.
There is an extension method for that: Request.GetDisplayUrl();
that returns https://localhost/MyController/MyAction?Param1=blah.
Or the encoded version Request.GetEncodedUrl()
To any of them you must add: using Microsoft.AspNetCore.Http.Extensions;
To get both relative path and query string in ASP.NET Core 2.0 or later, you can use an extension method of HttpRequest called GetEncodedPathAndQuery().
UriHelper.GetEncodedPathAndQuery(HttpRequest) Method
To use this method in your Razor view, please add #using Microsoft.AspNetCore.Http.Extensions either in your Razor view or in _ViewImports.cshtml.
Your <a> tag would then be:
<a asp-controller="Home" asp-action="Index"
asp-route-returnUrl="#Context.Request.GetEncodedPathAndQuery()">Log in</a>
I am from electronics background so don't have good knowledge in designing webpages. I am doing an ethernet project and for that I need to make a webpage but before that webpage I also need to make a login authentication webpage. I somehow managed to do it using HTML JAVASCRIPT but the problem is anyone can see the username password by viewing the page source.
I am having hard time making authentication. I have basic knowledge of HTML and JAVASCRIPT but ready to learn. All I can find on google is login templates but I don't even know how to use them.
Can anyone give me an example or point me to some good links.
HTML and Javascript are interpreted on the client side. For login purposes, it is the server side code that is commonly used to verify the credentials - simply because that fact that you are already aware of - with a simple client side implementation, you can see the credentials in source code, server side is also easier to work with, once you understand it, it is more flexible for further development, it is more secure, and it is really used everywhere for this task.
It is a good idea to use PHP, ASP, Ruby (or any other server side language) for this. If you do not want that, you need to make it hard for the user to read the credentials from the source code.
In order to do that, you can use various methods like cryptography or obfuscation. Cryptography is highly recommended over obfuscating as it provably adds more security to your application. Obfuscating basically means that you change the source code in a way that it is hard to read - you add functions that encode strings, so that your "password" can not be spotted on the first sight. However, obfuscation can always be bypassed, and usually quite easily with a good debugging tools.
So, let's go with cryptography. What you are looking for here is using one way hash functions. You have plenty to choose from - MD5, SHA1, SHA256, ... each provides different level of security. SHA256 implementation in Javascript is an example you can use. There are many other libraries and examples for this, so just use Google and find the one that you like.
Now, what to do with it? Say you have sha256() function that accepts a string and returns its hash as a string. For each user and password you have, you precount SHA256 hash of string "user + password".
Say, you want your username to be "Pedro" and password for this account is "MyPassword".
You precount the hash of "PedroMyPassword" - e.g. with with online hashing tool. You can see the its SHA256 hash is
40be6e939eedf018b2b846e027067dcb006585a2155ce324f1f2a6a71d418b21
This hash is what you put into your Javascript code.
When the user enters their user and password, you call your sha256 function on "username + password" and you compare it to your precounted hash.
Note that you have to select really strong password, otherwise certain attacks (such as dictionary attack) would be easy to use to break your hash.
The problem is now, that you did not specify, what you want to do next. For example, you might want to redirect authenticated users to next page, but here you have the same problem again - if you have redirection in Javascript to "secondpage.html" in your code, someone could just skip the authentication and navigate to this second page directly.
What you can do in this case is that you name your second page as
40be6e939eedf018b2b846e027067dcb006585a2155ce324f1f2a6a71d418b21.html
i.e. the hash of your user+pass string. In this variant you do not put the hash in the code at all. The web server will just return error 404 for all users that fail to authenticate. For example, if someone attempts to use "Pedro" with "123456" as password, the SHA256 would be
3bac31720fdd4619ebe2e8865ccc0dc87eb744f3f05f08c628bb9217a77e4517
and if you redirect them to
3bac31720fdd4619ebe2e8865ccc0dc87eb744f3f05f08c628bb9217a77e4517.html
it won't exist, because your second page file is called
40be6e939eedf018b2b846e027067dcb006585a2155ce324f1f2a6a71d418b21.html
You would need to create these second pages for each user/pass combination. You could then put a simple redirection code to the real second page.
But make sure you are using HTTPS protocol, otherwise, the second pages would go through the wire unencrypted ...
This all will work, but still, I highly suggest, you consider the server side way.
In my previous answer I was using client side technologies thats why the username and password was not safe and hidden if we check the page-source.
Now,we will use server side technology, for this you need web-server package such as WAMP,XAMPP etc
Download and install one of these packages.(if you have one of these two, then its well and good)
I am using XAMPP so I will explain with XAMPP.
If you have successfully downloaded XAMPP,
then look for the htdocs folder in XAMPP folder. Mine is "C:\xampp\htdocs"
copy the below code and create new php fileand Save this file as login.php in htdocs directory.
Here is php code.
<?php
$usr="root";
$pwd="root";
if(isset($_POST['username']) && !empty($_POST['username']) && isset($_POST['password']) && !empty($_POST['password']) ){
$username=$_POST['username'];
$password=$_POST['password'];
if(($username==$usr) && ($password==$pwd) ){
echo '<br>login successfull';
}else{
echo '<br>login unsuccessfull';
}
}else{
echo "<br>Connot be left empty!";
}
?>
ok!! Now Create a simple HTML page containing login form and save this as login.html
Here is the HTML code
<html>
<head>
<title>Login</title>
</head>
<body>
<form action="login.php" method="POST" align="center">
<br>
Username:<input type="text" name="username"><br><br><br>
Password :<input type="text" name="password"><br><br>
<input type="Submit" value="Submit">
</form>
</body>
</html>
Now, Goto browser->Type http://localhost/login.html and run
Insert Username and password as root.
I am assuming you have basic knowledge of php, if not go through it, its is very easy and also read about HTTP requests
GET
POST
<html>
<head>
<title>Login paget</title>
</head>
<script type="text/javascript">
function display(form){
if (form.username.value=="root") {
if (form.password.value=="root") {
location="page2.html"
} else {
alert("Invalid Password")
}
} else { alert("Invalid Username")
}
}
</script>
<body >
<form >
<input type="text" name="username" /><br><br>
<input type="password" name="password"/><br><br>
<input type="button" value="Login" onClick="display(this.form)"/>
</form>
</body>
</html>
Hello I have created a login page for you using html and Javascript. The Username and password are root.
You see if you input correct username and password then the page directs to page2.html and this will show you
This webpage is not found
ERR_FILE_NOT_FOUND
so what you have to do is replace page2.html with your next page name.
You can't really have a secure authentication system using JavaScript and HTML alone.
I would suggest Basic HTTP authentication on your server instead, as it is much more secure (not perfect by any means, but at least employs a standard server-side method of access control).
If you must implement something in JavaScript, you could do a password only scheme based on the name of a hidden directory. Something like the following (note this is untested so will need some tweaks):
(Code borrowed and adapted from this question)
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
$(function() {
var url = "some_url";
$.ajax(url,
{
if (statusCode == 200) {
document.location.href = url;
}
else {
alert('Incorrect password')
}
}
});
});
</script>
<input type="password" />Login
The code should be finished so that the function is called when the button is clicked. So if the password is foo, you set a directory on your website called foo, and if the JQuery JavaScript detects that the entered password matches a directory name (e.g. /foo/), then the user is redirected there. Therefore you'd create a /foo/index.html in order to take care of the user's logged in session.
Note that this is the most secure thing you can do with JavaScript and HTML alone and it suffers from the following vulnerabilities.
It requires that the URL be kept secret, although this can be leaked by the referer header, by browser history and server/proxy logs.
Once a user is logged in, they are always logged in (they could bookmark the logged in pages)
There is no easy way to revoke a password.
There is only one password.
Anyone with access to view files on the server could view the directory structure and learn the password.
The URL may be leaked by analytics tools.
Assumes directory browsing on your server is disabled (or that there's a default page in the private page's parent directory).
In any case, always protect your server with TLS/SSL. My recommendation is to properly create a user authentication system using the advice from OWASP. The above shows only what's achievable in basic HTML (not much). However, it is better than exposing the password within client-side files.
just try out this code
-
function validate(){
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
if ( username == "username1" && password == "password1"){
alert ("Login successfully");
}
else{
alert("Invalid username or password");
}
return false;
}
<html>
<head>
<title>Javascript Login Form Validation</title>
<!-- Include JS File Here -->
<script src="js/login.js"></script>
</head>
<body>
<div class="container">
<form id="form_id" method="post" name="myform">
<label>User Name :</label>
<input type="text" name="username" id="username"/>
<label>Password :</label>
<input type="password" name="password" id="password"/>
<input type="button" value="Login" id="submit" onclick="validate()"/>
</form>
</div>
</body>
</html>
i need to set on my web page a upload form for videos and i want that this videos are sent to my mail.
i found this code
<form name="myWebForm" action="mailto:annie.etoile#gmail.com" method="post">
<input type="hidden" name="MAX_FILE_SIZE" value="10mb" />
<input type="video" name="uploadField" />
<input type="submit" value="Send">
</form>
But when i press on "Send" it opens my mailing software, it doesn't send autmatically to me the video.
Maybe there's something wrong in the code?
It "opens your mail software" because that's exactly what it's being told to do here:
action="mailto:annie.etoile#gmail.com"
When you say you want it to "upload"... Where do you want it to go? If you want to send it to the web server then you need some server-side resource which can receive it. For example, if you have a PHP page which accepts the file upload, you'd change your form action to that page:
action="fileupload.php"
Then you'd have server-side code in that PHP file to accept the uploaded file and do whatever you want to do with it. (Including mail it to you.)
It doesn't have to be PHP on the server-side code, any server-side language/framework/environment/etc. can do the job. The point is that you'd need something there. If all you have is client-side code (which is all you have in the question) then the mailto: action is about as good as it's going to get.
I have a story model that serves as a wrapper for many posts. Posts may have photo attachments, and I use remotipart and paperclip to handle the image uploading and processing.
This works perfectly fine when a user POSTS a new post. I want to allow post authors to edit their posts/uploaded images; and this is where the problem occurs.
When a user clicks an edit button I alter the form that I originally used when users create posts so that that same form can be used to edit the post. As part of that I change I modify the <form> tag from:
<form id="new_post_for_story_241" class="new_post" accept_charset="UTF-8" action="/stories/241/posts.json" data-remote="true" enctype="multipart/form-data" method="post" novalidate="novalidate" target="">
to
<form id="new_post_for_story_241" class="new_post" accept_charset="UTF-8" action="/stories/241/posts/287.json" data-remote="true" enctype="multipart/form-data" method="put" novalidate="novalidate" target="">
Again, this works fine to PUT edits if the user doesn't include an image. It breaks, however, if the form contains a new image. For whatever reason, if the user wants to upload a new image as part of the altered form, the form is submitted with a GET action. Triggering this:
Started GET "/stories/241/posts/287.json?post%5Bphoto%5D=champcourse15thgreen.jpg&post%5Bcontents%5D=another+pic%0D%0A&remotipart_submitted=true&X-Requested-With=IFrame&X-Http-Accept=text%2Fjavascript%2C+application%2Fjavascript%2C+application%2Fecmascript%2C+application%2Fx-ecmascript%2C+*%2F*%3B+q%3D0.01" for 127.0.0.1 at 2013-05-22 10:54:50 -0700
ActionController::RoutingError (No route matches [GET] "/stories/241/posts/287.json"):
Anyone know why this is happening, and more importantly, have a fix for it?
You likely have an old version of the remotipart dependency jquery-iframe-transport which has incorrect code for setting the form's method (it is hardcoded instead of copying the original form's method). It's been fixed since.
I would like to POST data from my Windows Phone to a webpage that I created myself. The webpage will process the data and display any results.
After I POST the data, how I am able to navigate to the webpage with the posted data? (Example to www.test.com/#name=joe in the case it was GET)
A possible approach is to dynamically create an HTML page that performs the POST request and load it into the web browser control. The resulting web page will then nicely be displayed in the control.
The HTML page could look like this:
<html>
<head>
<title>Faceless</title>
<script type="text/javascript">
function submitForm() {
document.forms[0].submit();
}
</script>
</head>
<body onload="submitForm();">
<form method="POST" action="http://www.server.com/service.php">
<input type="hidden" name="name" value="Robert">
<input type="hidden" name="score" value="200">
</form>
</body>
</html>
You can load it into a web browser control with NavigateToString method.
Don't forget to enable JavaScript:
<phone:WebBrowser Name="webBrowser1" IsScriptEnabled="True" />
Have you tried looking up .net Web Requests and the .net web client class?
If your site is coded using PHP, you can send a http post request to the page (try avoid using a GET request for security reasons), and then do the necessary processing you need to do with the data.
Maybe this similar question will be of use to you:
Post with WebRequest
You could do 2 things
1. Send a Http Web Request of type POST. With this you have more control over the other approaches.
1. Once you get the response, load the dynamic html page in a webview(The dynamic page will be generated at the server side).