asgi-sitemaps 0.2.0

Sitemap generation for ASGI applications.

asgi-sitemaps

Generate and check sitemap files from ASGI apps without having to spin up a server. Powered by HTTPX and anyio.

Note: This is alpha software. Be sure to pin your dependencies to the latest minor release.

Quickstart

python -m asgi_sitemaps 'example:app' --base-url https://app.example.io > sitemap.xml

$ cat sitemap.xml
<?xml version="1.0" encoding="utf-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
    <url><loc>https://app.example.io/</loc><changefreq>daily</changefreq></url>
</urlset>

Use the --check mode to verify that the sitemap is in sync (e.g. as part of CI checks):

cat sitemap.xml | python -m asgi_sitemaps --check 'example:app' --base-url https://app.example.io

Features

• Offline sitemap generation from an ASGI app callable.
• Support for --check mode.
• Invoke from the command line, or use the programmatic async API (supports asyncio and trio).
• Fully type annotated.
• 100% test coverage.

Installation

Install with pip:

$ pip install asgi-sitemaps

asgi-sitemaps requires Python 3.7+.

Command line reference

$ python -m asgi_sitemaps --help
usage: __main__.py [-h] [--base-url BASE_URL] [-I IGNORE_PATH_PREFIX]
                   [--max-concurrency MAX_CONCURRENCY] [--check]
                   app

positional arguments:
  app                   Path to an ASGI app, formatted as
                        '<module>:<attribute>'.

optional arguments:
  -h, --help            show this help message and exit
  --base-url BASE_URL   Base URL to use when building sitemap entries.
                        (default: http://testserver/)
  -I IGNORE_PATH_PREFIX, --ignore-path-prefix IGNORE_PATH_PREFIX
                        Prevent crawling URLs that start with this path
                        prefix. Can be used multiple times. (default: [])
  --max-concurrency MAX_CONCURRENCY
                        Maximum number of concurrently processed URLs.
                        (default: 100)
  --check               Read existing sitemap from stdin and fail if computed
                        sitemap differs. (default: False)

Programmatic API

The .crawl() async function takes the following arguments:

• app: an ASGI application instance.
• base_url: see --base-url
• ignore: see --ignore-path-prefix.
• max_concurrency: see --max-concurrency.

It returns a list of strings referring to the discovered URLs.

You can use the .make_url(urls) helper to generate the sitemap XML and save it as is appropriate for your use case.

Example usage, outputting the sitemap to a sitemap.xml file (mimicking the CLI behavior):

import asgi_sitemaps

from .app import app

async def main():
    urls = await asgi_sitemaps.crawl(app)
    with open("sitemap.xml", "w") as f:
        f.write(asgi_sitemaps.make_xml(urls))

By default, .make_xml() generates <url> tags with a daily change frequency. You can customize the generation of URL tags by passing a custom urltag callable:

from urllib.parse import urlsplit

import asgi_sitemaps

def urltag(url):
    path = urlsplit(url).path
    changefreq = "monthly" if path.startswith("/reports") else "daily"
    return f"<url><loc>{url}</loc><changefreq>{changefreq}</changefreq></url>"

urls = ...
xml = asgi_sitemaps.make_xml(urls, urltag=urltag)

License

MIT

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog.

0.2.0 - 2020-06-01

Changed

• Project was renamed from sitemaps to asgi-sitemaps - sitemap generation for ASGI apps. (Pull #2)
• Change options of CLI and programmatic API to fit new "ASGI-only" project scope. (Pull #2)
• CLI now reads from stdin (for --check mode) and outputs sitemap to stdout. (Pull #2)

Removed

• Drop support for crawling arbitrary remote servers. (Pull #2)

Fixed

• Don't include non-200 or non-HTML URLs in sitemap. (Pull #2)

0.1.0 - 2020-05-31

Added

• Initial implementation: CLI and programmatic async API.