Why Can't AJAX Access Local Files and How Can I Fix It?

Cross-Origin Requests for Local Files: Resolving Cross-Domain Errors

AJAX requests aim to send and receive data asynchronously without reloading the web page. However, when attempting to access local files via AJAX, you may encounter the error: "Cross origin requests are only supported for HTTP."

Understanding the Issue

This error возникает because browsers enforce a security policy that prevents websites from accessing resources from other domains. In this case, the AJAX request is attempting to access a local PHP file (file:///), which is not considered an HTTP resource.

Solving the Problem

To address this issue, the following solution can be implemented:

Using the Command-Line Switch

1. macOS:

<code class="sh">open -a 'Google Chrome' --args -allow-file-access-from-files</code>

2. Linux:

<code class="sh">google-chrome --allow-file-access-from-files</code>

3. Windows:

• Right-click on the Chrome shortcut.
• Select "Properties."
• Add the following switch to the end of the "Target" path: --allow-file-access-from-files

Example:

<code class="sh">C:\ ... \Application\chrome.exe --allow-file-access-from-files</code>

Additional Note:

This solution effectively disables the cross-origin security policy for the specific Chrome instance, allowing you to make AJAX requests to local files. However, it's important to note that granting this permission can potentially pose security risks in certain situations. Use this workaround cautiously.

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