What does this PR do?
optimize incorrect content-type comparisons.

Why are these changes required?
When a client requests an interface, if it is an application/json request, it may be written in a variety of ways, including:

1. application/json
2. application/json;charset=iso-8859-1
3. application/json;charset=utf-8

When determining the content-type of a request, the interface needs to be compatible with the variable writing ways of the requests.

This PR has been tested by:

• Unit Tests
• Manual Testing

Follow up

Extra details