HTTP Bearer Token (Authorization Header) Regex for Python

What this pattern does

This page provides a well-structured, multi-part regular expression for matching http bearer token (authorization header), ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# HTTP Bearer Token (Authorization Header)
# ReDoS-safe | RegexVault — Web & Network > HTTP

import re

http_bearer_token_authorization_header_pattern = re.compile(r'^Bearer [A-Za-z0-9\-._~+/]+=*$')

def validate_http_bearer_token_authorization_header(value: str) -> bool:
    return bool(http_bearer_token_authorization_header_pattern.fullmatch(value))

# Example
print(validate_http_bearer_token_authorization_header("Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.dozjgNryP4J3jVmNHl0w5N_XgL0n3I9PlFUP0THsR8U"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Web & Network > HTTP category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Bearer tokens should be treated as opaque strings by resource servers. Validate the token signature and claims with your JWT library, not by regex. Token must not contain spaces.