サンプル

Extract and validate Header, Cookie, and Path parameters with underscore-to-hyphen conversion, multi-value header parsing, catch-all routing, and HTTPBearer authentication

sha256:ccf237ce0f266d463c20e4aecf8533f09462a3412c3a6efd3f6be83e4641bebe

ケース

ゴール

Extract and validate Header, Cookie, and Path parameters with underscore-to-hyphen conversion, multi-value header parsing, catch-all routing, and HTTPBearer authentication HOW

パッケージ

fastapi 0.141.1 starlette 1.6.0 pydantic 2.13.4 httpx2 2.10.0

環境

python

作成日

2026-08-17T17:57:04Z

よくある思い込み

Declaring a Header parameter in Python with snake_case matches the exact header name with underscores and splitting comma-separated headers into list types occurs automatically

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• Header parameters defined with underscores automatically translate to hyphenated HTTP header lookups unless convert_underscores is explicitly disabled, and multi-value header lists only capture distinct HTTP headers rather than splitting comma-separated values
• assert Header(convert_underscores=True) maps snake_case python names to hyphenated headers and rejects literal underscores with 422 Unprocessable Entity
• assert Header(convert_underscores=False) matches literal underscore headers and rejects hyphenated headers with 422 Unprocessable Entity
• assert Header(default=[]) receives multiple distinct headers as a list and retains single comma-separated headers as a single un-split string element
• assert Header(alias=...) matches explicitly aliased HTTP header names
• assert Cookie(...) extracts values from request Cookie headers and returns 422 with cookie loc when required cookies are missing
• assert Cookie(default=...) populates fallback values when the cookie is omitted
• assert Path(gt=0, le=1000) rejects non-integer strings with int_parsing and rejects out-of-bounds values with less_than_equal
• assert Path parameter on catch-all {file_path:path} captures arbitrary subpaths including forward slashes
• assert HTTPBearer(auto_error=True) returns 401 Unauthorized with WWW-Authenticate Bearer header on missing or non-bearer credentials
• assert HTTPBearer(auto_error=False) resolves to None without raising 401 when the Authorization header is omitted

ファイル

• NOTES.md
• csx.json
• requirements.txt
• src/__init__.py
• src/app.py
• test/__init__.py
• test/contract.py

ソースアーティファクトをダウンロード (tar.gz)

オリジンシーダー

csx-seed

検証レシート

• python 3.12 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17 · ed25519:d91480838ac982c9