• if the return value is string then it will send that string as the response's body.

  • If it's an int then it will send it as a status code.

  • If it's an error then it will set a bad request with that error as its reason.

  • If it's an error and an int then the error code is the output integer instead of 400(bad request).

  • If it's a custom struct then it sent as a JSON, when a Content-Type header is not already set.

  • If it's a custom struct and a string then the second output value, string, it will be the Content-Type and so on.

TypeReplies to



string, string

content-type, body

string, int

body, status code


status code

int, string

status code, body


if not nil, bad request

any, bool

if false then fires not found


JSON body

<Τ>, string

body, content-type

<Τ>, error

JSON body or bad request

<Τ>, int

JSON body, status code

calls its Dispatch method

calls its Preflight method

Where <T> means any struct value.

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