Sending form data to a CFC asynchronously in Coldfusion

Question

Sending form data to a CFC asynchronously in Coldfusion

To begin with, I want to mention that the product I am creating is intended for individuals who do not have automatic access to HTML5. Some of these people are still using IE8. Here's an example of a form:

<form action="ee.cfc?method=xlsupload" enctype="multipart/form-data" method="post"
    <input type="file" id="xlsfile" name="xlsfile" required>
    <input type="submit" value="Upload XLS">
</form>

In my .cfc file, there's a function that processes the uploaded file and converts it into a structure. This structure will then be uploaded to a database once the user validates the data. Currently, I have set it to

<cfreturn SerializeJSON(dataset,true)>

. However, when I submit the form, instead of processing the data, it opens the cfc file and displays the JSON structure. I have executed numerous form submissions using JQuery in the past, but I'm wondering if there is any way to achieve this without relying on JQuery. It would be great if Coldfusion has this capability, although I won't be surprised if it doesn't.

javascript jquery forms coldfusion

Answer 1

Answer №1

An alternative approach to handling form uploads asynchronously is by using JavaScript's Fetch API. This allows for asynchronous communication with the server while still allowing the user to interact with the webpage.

Here's an example implementation:

const form = document.querySelector('form');
form.addEventListener('submit', async (e) => {
  e.preventDefault();
  
  const fileInput = document.getElementById('xlsfile');
  const formData = new FormData();
  formData.append('xlsfile', fileInput.files[0]);

  try {
    const response = await fetch('upload.php', {
      method: 'POST',
      body: formData
    });
    
    if (response.ok) {
      window.location.href = 'done.html';
    } else {
      alert('Upload failed! Please try again.');
    }
  } catch (error) {
    console.error(error);
    alert('An error occurred during upload. Please try again.');
  }
});

In your server-side code, you can handle the form upload in a PHP file named "upload.php". After processing the uploaded file, you can redirect the user to a confirmation page using the header function:

<?php
// Handle the file upload logic here

header('Location: done.html');
exit;
?>

The "done.html" page can be customized to display a message confirming the successful upload.

Answer 2

An alternative approach to handling form uploads asynchronously is by using JavaScript's Fetch API. This allows for asynchronous communication with the server while still allowing the user to interact with the webpage.

Here's an example implementation:

const form = document.querySelector('form');
form.addEventListener('submit', async (e) => {
  e.preventDefault();
  
  const fileInput = document.getElementById('xlsfile');
  const formData = new FormData();
  formData.append('xlsfile', fileInput.files[0]);

  try {
    const response = await fetch('upload.php', {
      method: 'POST',
      body: formData
    });
    
    if (response.ok) {
      window.location.href = 'done.html';
    } else {
      alert('Upload failed! Please try again.');
    }
  } catch (error) {
    console.error(error);
    alert('An error occurred during upload. Please try again.');
  }
});

In your server-side code, you can handle the form upload in a PHP file named "upload.php". After processing the uploaded file, you can redirect the user to a confirmation page using the header function:

<?php
// Handle the file upload logic here

header('Location: done.html');
exit;
?>

The "done.html" page can be customized to display a message confirming the successful upload.

Sending form data to a CFC asynchronously in Coldfusion

Answer №1

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