tool::http-status-detail

100 Continue

Client should continue with the request.

Status Code

100

Name

Continue

Detailed Explanation

HTTP 100 Continue is an interim response indicating that the server has received the request headers and the client should proceed with the request body. It is used in the Expect: 100-continue mechanism, where a client checks whether the server will accept a large payload before actually sending it, avoiding unnecessary data transfer if the request would be rejected.

Common Causes

▸The client sent a request with an Expect: 100-continue header and the server approved it
▸A client is about to upload a large file and is verifying the server is ready
▸An HTTP/1.1 client is optimizing a large POST by pre-checking acceptance

How to Fix

1.100 is a normal interim response — no fix needed
2.The client should continue sending the request body after receiving 100
3.If the server returns 417 instead, retry the request without the Expect header