All my registration pages successfully send clickable links via email (using Symfony). However, I have a mail opt in page that's has similar code, but the links aren't turning up as clickable.
I've now set up identical test emails on the mail optin php page and one of my registration pages, and am sending just the following in each email:
$body = "https://www.blahblahsite.com"
The sender, populated with the same code for each test, is:
if (!$result = AppEmail::sendEmail($to, $subject, $body, $from, null, null))
{
//error handler
}
I've checked that my test code on each page is the same, yet one link still turns up not clickable.
The other factor is that I use gmail to send the emails:
$transport = Transport::fromDsn('smtp://myemail#blahblahsite.com:password_here#smtp.gmail.com:587?encryption=tls&auth_mode=login');
What other factors can determine whether a link arrives clickable please?
Thank you.
I have configured my email collector to display the body in french and I sent survey invite through Survey Monkey. It worked well. Default template is used if this is not specified String in Survey Monkey API. Is there a way to get already configured email collector setup message to be sent? I want the emails to be in the language I had chosen in SM UI
The best way to create a new message based on a template right now is to copy a previous message.
To do this, you'll want to include the collector/message to use as a template when creating a new message like this:
POST /v3/collectors/{collector_id}/messages
{
"from_collector_id": "<collector_to_use_as_template>",
"from_message_id": "<message_to_use_as_template>"
}
Note that the message ID in the body needs to belong to the collector ID in the body.
Starting with Zend and I´d like to know what is the simplest way of sending POST data to another page, not by forms, but by some link in my view instead. Thanks :)
You can't send POST data through a link. At least not through a normal link. Link can only carry GET data.
If you need to send POST over a link it's most certainly a design flaw.
If you're 100% sure, that you need it, you can do that using jQuery and onclick event. It`s not possible to do it without javascript. Other option would be to send it using form with hidden fields with single submit button visible - that would even work without javascript.
Normal hyperlinks in HTML are sent with GET requests and are not supposed to change the state of the resource being accessed. This is known as being idempotent. You can repeat the request over and over, and the result of each succeeding request to the same URL is the same as the first one.
POST requests don't have this restriction and are intended for when the user needs to change something (such as creating a new resource.)
It's not possible to send a POST request via a normal HTML link. And even if you find a way, it breaks an almost universal expectation that web users have. What are you trying to accomplish? Maybe there's a better way.
But to answer your question, you could use something like jQuery to capture the "click" event and make it do a POST request:
$('.my-link').click(function() {
var url = $(this).attr('href');
var data = {};
$.post(url, data, function() {
window.alert('success!');
});
return false;
});
If your URL has any query parameters, i.e. "?foo=bar&baz=bum", then you'd probably need to strip them off of the URL and pass them as a second parameter to the $.post() function. This is left as an exercise for the reader. ;-)
Page one contains an HTML form. Page two - the code that handles the submitted data.
The form in page one gets submitted. The browser gets redirected to page two. Page two handles the submitted data.
At this point, if page two gets refreshed, a "Confirm Form Resubmission" alert pops up.
Can this be prevented?
There are 2 approaches people used to take here:
Method 1: Use AJAX + Redirect
This way you post your form in the background using JQuery or something similar to Page2, while the user still sees page1 displayed. Upon successful posting, you redirect the browser to Page2.
Method 2: Post + Redirect to self
This is a common technique on forums. Form on Page1 posts the data to Page2, Page2 processes the data and does what needs to be done, and then it does a HTTP redirect on itself. This way the last "action" the browser remembers is a simple GET on page2, so the form is not being resubmitted upon F5.
You need to use PRG - Post/Redirect/Get pattern and you have just implemented the P of PRG. You need to Redirect. (Now days you do not need redirection at all. See this)
PRG is a web development design pattern that prevents some duplicate form submissions which means, Submit form (Post Request 1) -> Redirect -> Get (Request 2)
Under the hood
Redirect status code - HTTP 1.0 with HTTP 302 or HTTP 1.1 with HTTP 303
An HTTP response with redirect status code will additionally provide a URL in the location header field. The user agent (e.g. a web browser) is invited by a response with this code to make a second, otherwise identical, request to the new URL specified in the location field.
The redirect status code is to ensure that in this situation, the web user's browser can safely refresh the server response without causing the initial HTTP POST request to be resubmitted.
Double Submit Problem
Post/Redirect/Get Solution
Source
Directly, you can't, and that's a good thing. The browser's alert is there for a reason. This thread should answer your question:
Prevent Back button from showing POST confirmation alert
Two key workarounds suggested were the PRG pattern, and an AJAX submit followed by a scripting relocation.
Note that if your method allows for a GET and not a POST submission method, then that would both solve the problem and better fit with convention. Those solutions are provided on the assumption you want/need to POST data.
The only way to be 100% sure the same form never gets submitted twice is to embed a unique identifier in each one you issue and track which ones have been submitted at the server. The pitfall there is that if the user backs up to the page where the form was and enters new data, the same form won't work.
There are two parts to the answer:
Ensure duplicate posts don't mess with your data on the server side. To do this, embed a unique identifier in the post so that you can reject subsequent requests server side. This pattern is called Idempotent Receiver in messaging terms.
Ensure the user isn't bothered by the possibility of duplicate submits by both
redirecting to a GET after the POST (POST redirect GET pattern)
disabling the button using javascript
Nothing you do under 2. will totally prevent duplicate submits. People can click very fast and hackers can post anyway. You always need 1. if you want to be absolutely sure there are no duplicates.
You can use replaceState method of JQuery:
<script>
$(document).ready(function(){
window.history.replaceState('','',window.location.href)
});
</script>
This is the most elegant way to prevent data again after submission due to post back.
Hope this helps.
If you refresh a page with POST data, the browser will confirm your resubmission. If you use GET data, the message will not be displayed. You could also have the second page, after saving the submission, redirect to a third page with no data.
Well I found nobody mentioned this trick.
Without redirection, you can still prevent the form confirmation when refresh.
By default, form code is like this:
<form method="post" action="test.php">
now, change it to
<form method="post" action="test.php?nonsense=1">
You will see the magic.
I guess its because browsers won't trigger the confirmation alert popup if it gets a GET method (query string) in the url.
The PRG pattern can only prevent the resubmission caused by page refreshing. This is not a 100% safe measure.
Usually, I will take actions below to prevent resubmission:
Client Side - Use javascript to prevent duplicate clicks on a button which will trigger form submission. You can just disable the button after the first click.
Server Side - I will calculate a hash on the submitted parameters and save that hash in session or database, so when the duplicated submission was received we can detect the duplication then proper response to the client. However, you can manage to generate a hash at the client side.
In most of the occasions, these measures can help to prevent resubmission.
I really like #Angelin's answer. But if you're dealing with some legacy code where this is not practical, this technique might work for you.
At the top of the file
// Protect against resubmits
if (empty($_POST)) {
$_POST['last_pos_sub'] = time();
} else {
if (isset($_POST['last_pos_sub'])){
if ($_POST['last_pos_sub'] == $_SESSION['curr_pos_sub']) {
redirect back to the file so POST data is not preserved
}
$_SESSION['curr_pos_sub'] = $_POST['last_pos_sub'];
}
}
Then at the end of the form, stick in last_pos_sub as follows:
<input type="hidden" name="last_pos_sub" value=<?php echo $_POST['last_pos_sub']; ?>>
Try tris:
function prevent_multi_submit($excl = "validator") {
$string = "";
foreach ($_POST as $key => $val) {
// this test is to exclude a single variable, f.e. a captcha value
if ($key != $excl) {
$string .= $key . $val;
}
}
if (isset($_SESSION['last'])) {
if ($_SESSION['last'] === md5($string)) {
return false;
} else {
$_SESSION['last'] = md5($string);
return true;
}
} else {
$_SESSION['last'] = md5($string);
return true;
}
}
How to use / example:
if (isset($_POST)) {
if ($_POST['field'] != "") { // place here the form validation and other controls
if (prevent_multi_submit()) { // use the function before you call the database or etc
mysql_query("INSERT INTO table..."); // or send a mail like...
mail($mailto, $sub, $body); // etc
} else {
echo "The form is already processed";
}
} else {
// your error about invalid fields
}
}
Font: https://www.tutdepot.com/prevent-multiple-form-submission/
use js to prevent add data:
if ( window.history.replaceState ) {
window.history.replaceState( null, null, window.location.href );
}
I just finished the basic design structure for my contact page without flash; it's located here.
Can anyone suggest the best approach for making a confirmation script (inside a DIV) without reloading the page (preferably with jQuery). I want to replace the content in the main WRAP with new content (just text) confirming the email was received.
Any suggestions?
First of all I don't believe you can notify the user that the mail was actually received (at least not in a trivial way). But you can notify that it was sent.
For this with jQuery you can send the contact info via AJAX and then show the response in the DIV.
May be something like this:
$.ajax({
type: "POST",
url: "sendMail.php",
data: $('#contactForm').serialize(),
success: function(msg){
$("#responseDiv").html(msg).show();
}
});
Of course this is assuming that your server sends the for with "sendForm.php" and that your contact form is wrapped with a <form> with "contactForm" as an id.
The server should respond with the text to show within the div. If the message was sent or not.
Hope this helps.
References:
Ajax help for jQuery