Main causes

  • A client improperly converts a POST request to a GET request with long query information.

  • The client descends into a loop of redirection, such as a redirected URI prefix pointing to a suffix of itself.

  • The server is under attack by a client attempting to exploit potential security holes.

  • The client unintentionally or maliciously constructs an excessively long URL.

# Request example 
curl -X GET https://sandbox.oxylabs.io/ -H 'Accept: text/html' -H 'Accept-Encoding: br' -H 'User-Agent: Safari/537.36'

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Common fixes

  • Shorten the URL by reducing the number of query parameters or the length of each parameter.

  • Convert the GET request to a POST request to handle larger amounts of data in the request body instead of the URL.

  • Check and modify server settings to increase the maximum allowable URL length.

  • Review and correct any redirection loops or misconfigurations causing excessive URL length.

# Response example 
HTTP/1.1 414 URI Too Long
Content-Type: text/html; charset=UTF-8
Content-Length: 49

URI Too Long

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