refactor http service with authentication middleware.

[suzp1984]

What's the problem of http api authentication?

There are a lot of repeated codes in the http api hander func. https://github.com/ossrs/oryx/blob/9b475d9d52be54234d3d77383ec69f1085581c12/platform/transcript.go#L66-L78

Solution

refactor those token authentication codes to one place. There are 2 kinds of token verification.

1. Token in http post body. middlewareAuthTokenInBody
2. Token in url query. middlewareAuthTokenInURL
3. ai-talk.go is an exception, the token authentication depends room token, so keep ai-talk.go.