analog-fetcher 0.3.0

JS-aware HTML fetcher for Analog that probes-then-renders only when needed. Uses Playwright.

analog-fetcher

JS-aware fetching for Analog. Two fetchers, both implementing the analog.fetcher.Fetcher protocol:

• AnalogFetcher — the recommended default. Does a cheap HTTP fetch first, analyzes the HTML to decide if rendering is actually needed, and only escalates to a real browser when it is. Caches the decision per-domain so subsequent fetches skip the probe.
• PlaywrightFetcher — direct Playwright access. Use when you know you want JS rendering on every fetch and don't want the probe overhead.

When analog-fetcher is installed alongside analog-sdk, AnalogFetcher becomes the SDK's default automatically — no code change required on the caller side.

Installation

pip install "analog-sdk[fetcher]"   # installs analog-sdk + analog-fetcher
# or
pip install analog-fetcher           # standalone (pulls analog-sdk too)

Then install the browser binaries Playwright uses:

playwright install chromium

Usage

The simplest path — let the SDK use the smart default:

from analog import analog

# AnalogFetcher is the default when analog-fetcher is installed.
result = analog("https://example.com")

Or construct one explicitly with custom behavior:

from analog import analog
from analog_fetcher import AnalogFetcher, PlaywrightFetcher

# Customize the rich fetcher used during escalation.
fetcher = AnalogFetcher(
    rich=PlaywrightFetcher(wait_for=".loaded", headless=True),
)
result = analog("https://example.com", fetcher=fetcher)

Or force Playwright on every fetch:

from analog_fetcher import PlaywrightFetcher

with PlaywrightFetcher(headless=True) as fetcher:
    r1 = analog("https://example.com/a", fetcher=fetcher)
    r2 = analog("https://example.com/b", fetcher=fetcher)
    # Browser launches once, is reused across both fetches.

See https://getanalog.io for full documentation.

License

MIT — see LICENSE.