499 Token Required or Client Closed Request

The 499 HTTP response status code indicates two possible scenarios.

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Introduction
In Action
Sample
Conclusion

Introduction

When you encounter the HTTP status code 499, it indicates two possible scenarios. In ArcGIS, it means “Token Required,” suggesting that you need to include a token in your request for proper authentication.

In nginx, it is “Client Closed Request,” signaling that the client closed the connection before the server could fully respond.

In Action

In ArcGIS, if you receive the HTTP status code 499 – “Token Required,” it means that the server expects you to provide a token with your request, but you didn’t include one. To resolve this, you need to resend the HTTP request with a valid token.

For nginx, when you encounter the HTTP status code 499 – “Client Closed Request,” it means that the client closed the connection before the server could complete its task. This prevents the server from sending the final response, and the status code is only recorded in the nginx logs.

Note: Search engines like Google won’t index URLs with the 499 response status, so any previously indexed URLs returning this code will be removed from search results.

Conclusion

The HTTP status code 499 – “Token Required” is specific to ArcGIS and indicates that the server expects a token with the HTTP request, but none was provided. For nginx, the status code 499 – “Client Closed Request” means that the client closed the connection before the server finished processing the request. Both codes help identify issues with client-server interactions and prompt users to take appropriate actions to resolve them.