Build a Request Intercept Proxy | Dataford Interview Questions

Build a lightweight proxy server that intercepts API requests, injects authentication headers, and logs payloads asynchronously.

Implement proxy_requests(requests, auth_token) to process request dictionaries without opening network sockets. Return forwarded requests in input order and payload logs in that same order, while using background workers for logging. Each request contains method, url, headers, and payload; each forwarded request must preserve all fields while setting headers["Authorization"] to "Bearer " + auth_token. Return {"forwarded": [...], "logs": [...]}, where each log contains method, url, and payload.

Constraints

0 <= len(requests) <= 1000
Each request contains method, url, headers, and payload
headers is a dictionary with string keys and values
payload may be null or any JSON-compatible value
The input list and its request dictionaries must not be mutated
The returned forwarded requests and logs must match input order

Function Signature

def proxy_requests(requests, auth_token):

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Problem

Build a lightweight proxy server that intercepts API requests, injects authentication headers, and logs payloads asynchronously.

Constraints

0 <= len(requests) <= 1000
Each request contains method, url, headers, and payload
headers is a dictionary with string keys and values
payload may be null or any JSON-compatible value
The input list and its request dictionaries must not be mutated
The returned forwarded requests and logs must match input order

Function Signature

def proxy_requests(requests, auth_token):

Your question is Build a Request Intercept Proxy. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.