Issue with Prototype.js: Headers added to request details cannot be viewed in browser

Looking to enhance Ajax.Request with additional headers, I have constructed the requestHeader object:

requestHeaders: {
     'Access-Control-Allow-Origin': '*',
     'Access-Control-Allow-Methods': 'GET,POST,PUT,DELETE,OPTIONS',
     'Access-Control-Allow-Headers': 'Access-Control-Allow-Origin'
}

However, upon inspecting my request in the browser, I am unable to locate these headers. The console displays the error message:

"XMLHttpRequest cannot load . Request header field Access-Control-Allow-Origin is not allowed by Access-Control-Allow-Headers."

Any solutions for resolving this issue?

javascriptajaxprototypejsrequest-headers

Answer №1

After reviewing the changes in this GitHub Pull Request for version 1.7.2, it seems possible to eliminate the additional X-* headers that Prototype includes in Ajax requests.

Removing specific headers like X-Requested-With and X-Prototype-Version could address the CORS issues you are encountering.

You can try updating your headers object as follows:

requestHeaders: {
 'Access-Control-Allow-Origin': '*',
 'Access-Control-Allow-Methods': 'GET,POST,PUT,DELETE,OPTIONS',
 'Access-Control-Allow-Headers': 'Access-Control-Allow-Origin',
 'X-Requested-With': null,
 'X-Prototype-Version': null
}

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