mirror of
https://git.sr.ht/~seirdy/seirdy.one
synced 2024-11-27 14:12:09 +00:00
92 lines
2.7 KiB
Bash
92 lines
2.7 KiB
Bash
#!/bin/sh
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#
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# Script to fetch all approved webmentions from webmentiond as a big json response.
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# Uses POSIX and cURL in CI, also uses any pass/pash-compatible pwmngr otherwise
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# The response is cached for 90 minutes. If fetching fresh webmentions fails, fall back to the cached version for up to one day (1440 minutes). If cached webmentions are older than a day, error out.
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# no pipefail here since there are no pipes.
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set -e -u
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dirname="$(dirname "$0")"
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curl_wrapper="$dirname/curl-wrapper.sh"
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auth_url='https://seirdy.one/webmentions/authenticate/access-key'
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webmentions_url='https://seirdy.one/webmentions/manage/mentions?limit=9999&status=approved'
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webmentions_file="$dirname/../data/webmentions.json"
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stale_after_minutes=90
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fallback_stale_after_minutes=1440
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skip_check=0
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times_run=0
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check_cached_webmentions() {
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times_run="$((times_run + 1))"
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if [ "$skip_check" = 0 ]; then
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expires_in="$fallback_stale_after_minutes"
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if [ $# -gt 0 ]; then
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expires_in="$1"
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fi
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exit_status=1
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if [ -f "$webmentions_file" ]; then
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old_webmention_file="$(find "$webmentions_file" -mmin +"$expires_in")"
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if [ "$old_webmention_file" = "" ]; then
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echo 'Using cached webmentions'
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skip_check=1
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exit_status=0
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exit 0
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fi
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return 1
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fi
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if [ "$exit_status" = 1 ] && [ "$times_run" = 2 ]; then
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echo "Webmentions are outdated. failed to fetch for over a day."
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exit "$exit_status"
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fi
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fi
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}
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trap check_cached_webmentions EXIT
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# Grab my long-lived key (password). We will use this to authenticate.
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key() {
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set +u
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if [ -n "$BUILD_SUBMITTER" ]; then
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cat ~/.webmentiond-key
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else
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pash show webmentiond-ci-key
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fi
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set -u
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}
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# Fetch a short-lived access token from my webmention receiver.
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token() {
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key_response="$(key)"
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"$curl_wrapper" -sX POST "$auth_url" -d "key=$key_response"
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}
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# Verify that the webmentions file has downloaded succesfully by ensuring that it starts and ends with a given substring.
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# The total number of webmentions should be at least a 3-digit number.
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verify_webmentions() {
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grep -E '^\{"items":\[\{"id":".*,"total":[0-9]{3}([0-9]*)?\}$' "$webmentions_file.tmp" >/dev/null
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}
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# use the token to fetch all webmentions.
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fetch_webmentions() {
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echo 'Fetching webmentions'
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token_response="$(token)" || return 1
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"$curl_wrapper" --compressed -H "Authorization: Bearer $token_response" "$webmentions_url" -o "$webmentions_file.tmp" || return 1
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if verify_webmentions; then
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mv "$webmentions_file.tmp" "$webmentions_file"
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else
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echo 'Error: webmentions failed to verify'
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exit 1
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fi
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}
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# fetch webmentions if we don't have a fresh copy already.
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if [ -f "$webmentions_file" ]; then
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if ! check_cached_webmentions "$stale_after_minutes"; then
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fetch_webmentions
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fi
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else
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fetch_webmentions
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fi
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