content-negotiation 1.1.0

A library for deciding content-type based on media ranges in HTTP Accept headers.

content-negotiation

A small Python library supporting content-negotiation.

It is used to decide content type based on a list of media ranges, as well as deciding content-language based on the accpe-language header.

Usage

Install

% pip install content-negotiation

Getting started

Content type

from content_negotiation import decide_content_type, NoAgreeableContentTypeError

accept_headers = ["application/json", "text/html", "text/plain, text/*;q=0.8"]
supported_content_types = ["text/turtle", "application/json"]

try:
    content_type = decide_content_type(accept_headers, supported_content_types)
except NoAgreeableContentTypeError:
    print("No agreeable content type found.")
    # Handle error, by returning e.g. 406 Not Acceptable

Content language

from content_negotiation import decide_content_language, NoAgreeableContentLanguageError

accept_language_headers = ["en-GB;q=0.8", "nb-NO;q=0.9"]
   supported_languages = ["en-GB", "en", "nb-NO", "nb", "en-US"]

try:
    content_language = decide_decide_language(accept_language_headers, supported_languages)
except NoAgreeableLanguageError:
    print("No agreeable language found.")
    # Handle error, by returning e.g. 406 Not Acceptable

Development

Requirements

• pyenv (recommended)
• python3
• pipx (recommended)
• poetry
• nox

% pipx install poetry==1.1.13
% pipx install nox==2022.1.7
% pipx inject nox nox-poetry==0.9.0

Install developer tools

% git clone https://github.com/Informasjonsforvaltning/content-negotiation.git
% cd content-negotiation
% pyenv install 3.8.13
% pyenv install 3.9.13
% pyenv install 3.10.6
% pyenv local 3.8.13 3.9.13 3.10.6
% poetry install

Run all sessions

% nox

Run all tests with coverage reporting

% nox -rs tests

Debugging

You can enter into Pdb by passing --pdb to pytest:

% nox -rs tests -- --pdb  --log-cli-level=DEBUG

You can set breakpoints directly in code by using the function breakpoint().