I need to POST a HTML form to a 3rd party website (a Mass-SMS texting system).
In the past I've done this by forwarding to a page containing a form I've pre-populated and hidden (using display:none), then I've ran a javascript function at the end of the page to automatically submit this form.
However I'm hoping theres someway I can do all this programmatically (as I don't care about the response, and the user doesn't need to see the page the form is being posted to).
How can I do this? Cheers
You could use a WebClient.UploadValues method to send an HTTP POST request to a remote server from your code behind. Just fill up the name/value collection with the values coming from the hidden fields.
If you're willing to get into PHP, you can very easily use cURL for this.
Otherwise it's going to be quite difficult using just Javascript.
See here for a detailed tutorial.
Related
I got an ASP NET Core RazorPage having a button which asynchronously replaces a part of the given HTML using an AJAX request.
Besides some text content it renders another button which is intended to post back the side when clicked. It is surrounded by a form element.
However, clicking the button I receive an HTTP 400 with the information "This page isn't working" (Chrome). Other browsers like Firefox return an HTTP 400 as well.
The relevant HTML with the button which has been created by the AJAX call is the one below:
<form method="post">
<button class="btnIcon" title="Todos" id="btnTodos" formaction="PersonManagement/Parts/MyPageName?handler=PerformTodos">Execute action</button>
</form>
As the url exists (I doublechecked it using the browser with a simple GET) I wonder whether the issue could be due to some security settings along with the browser or is there anything I am perhaps missing out here?
Thank you for any hint
Two things here first add this attribute to your form asp-antiforgery="true", then send it's value to the server in your AJAX post request.
jQuery magic starts here :)
token: $('[name=__RequestVerificationToken]').val(),
Antiforgery is ON by default since .net core 2.0 (as far as I remember), so if you do AJAX post you need to send the antiforgery token with each request.
Let us know if it helps. Spread knowledge don't hide it just for yourself :P
Finally I came across a very interesting article from Matthew Jones at https://exceptionnotfound.net/using-anti-forgery-tokens-in-asp-net-core-razor-pages/ about Anti-Forgery Tokens in Razor pages. Worth reading, indeed.
However, independently from that article what solved my issue was simply not to add the <form .. element at the client-side, but already at the server-side. As there is no need for me to explicitly adding it at the client-side, but only the button itself, this is a solution for me which works properly.
A brief summary of my scenario now:
There is a Razor Page containing usual cshtml content along with a <form method="post"..
Some anchor elements also are included, one is triggering a JQuery AJAX call to the server
The JQuery call comes back from the server with some additional HTML including the post button which which I add to the existing HTML.
The button is being rendered inside the now already existing
Clicking the button causes the page to post back in the wanted manner and executes the handler as intended.
Thanks again Stoyan for your input and help with that.
I've been trying to figure this out using various different methods. I'm trying to create a script/bookmark or some type of quick action to open a browser tab or window with a specific URL, and automatically log me in using my credentials. I'm not all that concerned about security for this at the moment.
At first I figured I'd try to use a javascript bookmark to do this, but nothing I found in my research worked. Next I tried to create a bash script, but I couldn't figure out how to send the credentials in via the terminal. Most recently, I literally copied the source code of a site, created a local file and tried to hack together something where I could prefill the form data with credentials and use JS to submit the form, and I've gotten close with this, but for some reason when I use the JS submit function, it errors out and says that the username and password are invalid. But when i turn off the submit function and manually click "log in" on my local html page, it works as expected. I want this to be a one click process, so the idea of using onload/submit or something to that affect is really important to me.
The site I'm testing with has a Rails backend and my next attempt might be trying to use POST to do what I'm thinking, but that's currently outside of my level of knowledge on the subject.
Anyone answering: i do not want to use a password manager to accomplish this.
My requirement is that i will either be able to a) run a script or b) use a 1-click option to do this per website. Ideally i'd be able to set this up in a sort of programmatic way to do this with multiple sites, but I'd be happy with 1 at the moment.
i know similar questions have been answered before, but I haven't been able to use information from those posts (the ones I've seen anyway) to figure out a good way to do this.
Create a bookmark for the current page you have opened.
Edit the bookmark
Change the value for the URL to something like this.
(javascript:(function(){CODE_GOES_HERE_FROM_BELLOW})();
find the field for username and password on the page.
Given example for hotmail
var inputs = document.getElementsByTagName('input'); for(var i=0;i<inputs.length;i++){if(inputs[i].name === 'passwd'){inputs[i].value = 'YOUR_PASSWORD'}else if(inputs[i].name === 'loginfmt'){inputs[i].value = 'YOUR_USERNAME'}}; document.getElementById(document.getElementsByTagName('form')[0].id).submit();
OR
try out casperjs.
The proposed solution didn't work for me and rather than spending tons of time installing a testing framework that I'll never use other than for this purpose, I decided to try to do this another way.
First, I found out that the reason my JS wasn't working before is because the site did not allow a JS submit to be done, or atleast that's what it seemed to be when I got this error: "Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience"
The javascript I was using was in fact working, just not submitting. I used the following code to fill the fields (using "Class Name" elements on the page since there was no name or ID):
document.getElementsByClassName('username')[0].setAttribute('value', 'user');
document.getElementsByClassName('password')[0].setAttribute('value', 'password');
As I mentioned, the problem was when I tried to use JQuery to submit the form: document.getElementsByClassName('loginForm')[0].submit();
Which is when the above error cropped up. I can't really say for sure whether this is the root of the cause, but the page does submit, but I get an invalid username/password error when I do
I haven't figured out a great way to get around this just yet, but my short-term, "hacky" solution was to use Applescript to send a return keystroke to the browser to submit the form. I'd ideally like to figure out how to get the submission to work using JQuery, but I'm not sure how to get around it.
Situation: I needed to add form with POST method to CMS page. I created custom hook and a module displaying the form successfully. Then I need to react to user input errors eg. when user doesn't enter email address I need to detect it, display the whole page again together with the form and with "errors" in user input clearly stated.
Problem: The problem is to display the WHOLE page again with connected information (eg. about errors etc.). In the module PHP file when I add this kind of code,
return $this->display(__FILE__, 'modulename.tpl');
it (naturally) displays ONLY the form, not the whole CMS page with the form.
In case of this code,
Tools::redirectLink('cms.php?id_cms=7');
I can't get to transfer any information by GET neither POST method.
$_POST['test'] = 1;
Tools::redirectLink('cms.php?id_cms=7&test');
I tried to assign to smarty variables too
$smarty->assign('test', '1');
(I need to use it in .tpl file where the form itself is created) but no way to get it work.
{if isset($test)}...,
{if isset($smarty.post.test)}...,
{if isset($_POST['test'])}... {* neither of these conditionals end up as true *}
Even assigning a GET parameter to url has no impact, because there is link rewriting to some kind of friendly url I guess, no matter I included other argument or not. ([SHOPNAME]/cms.php?id_cms=7&test -> [SHOPNAME]/content/7-cmspage-name)
My question is: is there a way to "redirect" or "reload" current page (or possibly any page generally) in prestashop together with my own data included?
I kind of explained the whole case so I'm open to hear a better overall solution than my (maybe I'm thinking about the case in a wrong way at all). This would be other possible answer.
The simplest method would be to use javascript to validate the form - you can use jQuery to highlight the fields that are in error; providing visual feedback on how the submission failed. In effect you don't allow the user to submit the form (and thus leave the page) until you're happy that the action will succeed. I assume that you will then redirect to another page once a successful submission has been received.
There's lots of articles and how-tos available for using javascript, and indeed jQuery for form validation. If you want to keep the site lean and mean, then you can provide an override for the CMS controller and only enqueue the script for the specific page(s) you want to use form validation on.
If the validation is complex, then you might be best using AJAX and just reloading the form section of your page via a call to your module. Hooks aren't great for this kind of thing, so you might want to consider using an alternative mnethod to inject your code onto the cms page. I've written a few articles on this alternative approach which can be found on my prestashop blog
I am needing to get the browser height and width of the browser window with vb. I can get these values by setting an ASP.Net hidden input control using javascript, after the page has loaded and a post back is done. I need to be able to get these values when the page initially loads so I can create an image based on those values.
I am still new at VB.Net, so any help would be great. Thanks!
Quick answer: No, you cannot.
BUT: You may have access to those values by looking at the request headers values.
Please note that the value may not always be there and that different browser may or may not sent those values with different keys.
The best way to have this value should be usign javascript or vbscript (ie CLIENT script). You may use ajax you create your image async way.
ASP.NET is a SERVER side programming language (like JSP or PHP) and has nothing to do with which browser access it...
Look at it this way, what is the screen size of Google Bot "browser" ? Or what if a access your site with telnet ?
So you should use client script to have acces to client properties.
Do not hesitate to comment if I am not clear or right.
Is it possible to make a program that open a page (as if a bookmark file were opened by IE), and based on its content generate a feedback, that should be fedback in a textbox on said page by pressing a button on said page?
I need this program to execute on a set time schedule to feed some data to a web server based on time dependent web page data.
Yes, that is possible. It is generally called screen scraping. You basically retrieve the web page in question via a HTTP request, parse/analyze the page you got, then send back the data that should go into the textbox (again a HTTP request).
There are libraries to do that. Here is an article describing an example in Perl:
http://www.perl.com/pub/a/2003/01/22/mechanize.html