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How to Mock an OTLP HTTP Endpoint in Python

This code implements a lightweight HTTP server that accepts OTLP/HTTP trace exports, stores spans by trace ID, and exposes them via a simple GET endpoint for debugging.

otlp http mock

Python

import json
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from collections import defaultdict

class TraceHandler(BaseHTTPRequestHandler):
    traces = defaultdict(list)

    def do_POST(self):
        if self.path == "/v1/traces":
            length = int(self.headers.get("Content-Length", 0))
 …

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