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35 lines
1.3 KiB
JavaScript
35 lines
1.3 KiB
JavaScript
/**
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* Read-only database plumbing for the city report extraction (C163).
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*
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* The extraction runs against production on the homeserver. The read-only
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* guarantee is set at the connection level (Postgres `options` startup
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* parameter): every statement of the session fails if it tries to write — the
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* guard does not depend on the script being careful.
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*/
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export const READ_ONLY_PG_OPTIONS = '-c default_transaction_read_only=on -c statement_timeout=30000'
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export const withReadOnlyDatabaseUrl = (databaseUrl, options = READ_ONLY_PG_OPTIONS) => {
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if (typeof databaseUrl !== 'string' || databaseUrl.trim() === '') {
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throw new Error('DATABASE_URL ausente — a extração read-only precisa do alvo.')
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}
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let url
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try {
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url = new URL(databaseUrl)
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} catch {
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throw new Error('DATABASE_URL inválida.')
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}
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const existing = url.searchParams.get('options')
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url.searchParams.set('options', existing ? `${existing} ${options}` : options)
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return url.toString()
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}
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/** `host:porta/banco` — connection label without credentials, for the report footer. */
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export const databaseLabel = (databaseUrl) => {
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try {
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const url = new URL(databaseUrl)
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return `${url.hostname}:${url.port || '5432'}${url.pathname}`
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} catch {
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return 'desconhecida'
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}
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}
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