400 Bad request from handler transport

[ndh96coder]

Here is my code server:
https://onlinegdb.com/r1gZ6lnFH

After curl localhost:8080 the console show:
call zipkin transport_handler
code = 400, text = Expected value at line 1 column 1 path $ reading List from json , reason = Bad Request

How can i Fixed it. Thanks you

[killpanda]

For current version, please use v1 version API instead of v2 one.

Change DSN from

ZIPKIN_BASE_URL = "http://localhost:9411/api/v2/spans"

To

ZIPKIN_BASE_URL = "http://localhost:9411/api/v1/spans"