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API design & gRPC

REST best practices, protobuf, API versioning, and backward-compatible service contracts.

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API design & gRPC easy

How to Add a Correlation ID Tracing Header in Python

A mock middleware generates or preserves a correlation ID header and logs structured JSON messages with it for API request tracing.

correlation-id tracing middleware
Python 
import uuid
import json
from dataclasses import dataclass, field
from typing import Optional

@dataclass
class Request:
    headers: dict = field(default_factory=dict)

    def get(self, key, default=None):
        return self.headers.get(key, default)

class CorrelationIdMiddleware:
    def __init__(self, header_name…
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