The HyperText Transfer Protocol (HTTP) 412 Precondition Failed client error response code indicates that access to the target resource has been denied.
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What does the HTTP status code 412 mean?
The HTTP Status Code 412 means that the server does not meet one of the preconditions that the client put in its request header fields. Written by Benjamin Bouchet on Sep 12, 2020 and last updated at Sep 23, 2021. Get your API key in 10 seconds and start automating workflows.
What is 412 Precondition Failed Client Error response code?
The HyperText Transfer Protocol (HTTP) 412 Precondition Failed client error response code indicates that access to the target resource has been denied. This happens with conditional requests on methods other than GET or HEAD when the condition defined by the If-Unmodified-Since or If-None-Match headers is not fulfilled.
Why am I getting 409 instead of 412?
Therefore, a client that doesn’t send ETags won’t be expecting a 412. Conversely, a client that does send ETags won’t understand that it’s ETags that are causing a 409.
What is the difference between 409 and 412 for ETags?
If-Match) caused the version matching to fail, whereas 409 should be used if the entity would cause a conflict (the HTTP spec itself alludes to this behaviour in the definition of 409 ). Therefore, a client that doesn’t send ETags won’t be expecting a 412.