June 19th, 2024

Breaking Changes:

• 🐛⚠️ (server, smithy-rs#3690) Fix request Content-Type header checking

  Two bugs related to how servers were checking the Content-Type header in incoming requests have been fixed:

  1. Content-Type header checking was incorrectly succeeding when no Content-Type header was present but one was expected.
  2. When a shape was @httpPayload-bound, Content-Type` header checking occurred even when no payload was being sent. In this case it is not necessary to check the header, since there is no content.

  This is a breaking change in that servers are now stricter at enforcing the expected Content-Type header is being sent by the client in general, and laxer when the shape is bound with @httpPayload.