ACCESS CONTROL ALLOW ORIGIN CHROME FULL
ACCESS CONTROL ALLOW ORIGIN CHROME CODE

Because SOP is “on” by default, setting CORS at the server-side will allow a request to be sent to the server via an XMLHttpRequest even if the request was sent from a different domain. The Cross Origin Resource Sharing (CORS) is one of the few techniques for relaxing the SOP.

ACCESS CONTROL ALLOW ORIGIN CHROME CODE

This is a security risk - you really only want code that comes from the site you are on to execute and not just any code that is out there.

This policy exists because it is too easy to inject a link to a javascript file that is on a different domain. It would prevent different origins from interacting with each other through such requests, like AJAX. In other words, the browser would not allow any site to make a request to any other site. The Same Origin Policy (SOP) is the policy browsers implement to prevent vulnerabilities via Cross Site Scripting (XSS). Note: This looks like the code in the api for the access control headers.Ĭross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at I’m thinking that either the API recommended practices page is no longer correct and needs changing, or the User-Agent header should be included in Access-Control-Allow-Headers returned from the api.

ACCESS CONTROL ALLOW ORIGIN CHROME FULL

I can post the full html + js if you need. Step 4: see the error appear in the console Step 3: Open the page in Firefox, open dev tools (F12) to the console, then click the button Step 2: onclick of the button execute the following javascript function: async function testUserAgent() Step 1: Create simple html page with a button Removing the User-Agent header allows it to work in Firefox. This worked so far in Chrome, but trying it out in Firefox - it hits an error during the pre-flight request which complains that Access-Control-Allow-Headers does not allow User-Agent. I followed the advice on that page to include a custom User-Agent header in all requests. I’ve started making a web app that interacts with the iNaturalist API directly through javascript in the browser, and I’ve been trying to follow the advice on the API recommended practices page. (Reason: header ‘user-agent’ is not allowed according to header ‘Access-Control-Allow-Headers’ from CORS preflight response). Screenshots of what you are seeing: Not a screenshot, but here’s a log message:Ĭross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at.

URLs of any relevant observations or pages: any v1 api request.

Access control allow origin chrome