Rebuild: fresh AdonisJS 7 API app on Postgres
The rebuild branch starts over (REBUILD.md): the API starter kit, with Postgres instead of SQLite (its own database, DB_SEARCH_PATH for a shared one in development) and the #lib alias. Phase 1's code is imported from the current app module by module. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Daan MeijerandClaude Opus 5.5 committed
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@@ -1,140 +0,0 @@
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import { YencError } from './errors.js'
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/** Fields of the `=ybegin` line. `part`/`total` are absent in single-part posts. */
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export interface YencBegin {
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line: number
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size: number
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name: string
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part?: number
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total?: number
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}
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/** Fields of the `=ypart` line. Offsets are 1-based and `end` is inclusive. */
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export interface YencPart {
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begin: number
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end: number
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}
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/** Fields of the `=yend` line. CRCs are lowercase 8-digit hex. */
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export interface YencEnd {
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size: number
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part?: number
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pcrc32?: string
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crc32?: string
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}
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export interface YencMeta {
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begin: YencBegin
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part?: YencPart
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end: YencEnd
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/** Byte range of the encoded data inside the article body. */
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dataStart: number
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dataEnd: number
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}
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const CRLF = Buffer.from('\r\n')
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const BEGIN = Buffer.from('=ybegin ')
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const PART = Buffer.from('=ypart ')
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const END = Buffer.from('\r\n=yend ')
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/**
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* Parses `key=value` pairs from a yEnc header line. `name` is always the last
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* field and runs to the end of the line, because filenames may contain spaces
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* and `=`.
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*/
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function parseFields(line: string): Record<string, string> {
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const fields: Record<string, string> = {}
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const nameIndex = line.search(/(^|\s)name=/)
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let rest = line
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if (nameIndex !== -1) {
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const nameStart = line.indexOf('name=', nameIndex) + 'name='.length
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fields.name = line.slice(nameStart).trim()
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rest = line.slice(0, nameIndex)
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}
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for (const match of rest.matchAll(/(\w+)=(\S+)/g)) {
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fields[match[1]] = match[2]
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}
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return fields
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}
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function toInt(fields: Record<string, string>, key: string, required: true): number
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function toInt(fields: Record<string, string>, key: string, required?: false): number | undefined
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function toInt(fields: Record<string, string>, key: string, required = false) {
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const raw = fields[key]
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if (raw === undefined) {
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if (required) throw new YencError(`Missing "${key}" in yEnc header`)
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return undefined
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}
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const value = Number.parseInt(raw, 10)
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if (!Number.isFinite(value)) throw new YencError(`Invalid "${key}" in yEnc header: ${raw}`)
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return value
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}
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function toCrc(fields: Record<string, string>, key: string) {
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const raw = fields[key]
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if (raw === undefined) return undefined
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if (!/^[0-9a-fA-F]{1,8}$/.test(raw)) throw new YencError(`Invalid "${key}" in yEnc trailer: ${raw}`)
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return raw.toLowerCase().padStart(8, '0')
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}
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/**
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* Number of parts in the file. Many posters leave `total=` out of `=ybegin`;
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* then it follows from the part size, since all parts except the last one
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* are the same size.
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*/
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export function inferTotalParts(meta: Pick<YencMeta, 'begin' | 'part'>): number {
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const { begin, part } = meta
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if (begin.total) return begin.total
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if (!part || begin.part === undefined) return 1
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if (part.end >= begin.size) return begin.part
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return Math.ceil(begin.size / (part.end - part.begin + 1))
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}
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function lineAt(buffer: Buffer, start: number) {
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const eol = buffer.indexOf(CRLF, start)
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const end = eol === -1 ? buffer.length : eol
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return { text: buffer.subarray(start, end).toString('latin1'), next: end + CRLF.length }
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}
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/**
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* Locates and parses the yEnc header/trailer lines of one article body,
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* without decoding the data itself.
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*/
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export function parseYencMeta(body: Buffer): YencMeta {
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const beginIndex = body.indexOf(BEGIN)
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if (beginIndex === -1) throw new YencError('No =ybegin line found')
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const beginLine = lineAt(body, beginIndex)
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const beginFields = parseFields(beginLine.text)
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const begin: YencBegin = {
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line: toInt(beginFields, 'line', true),
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size: toInt(beginFields, 'size', true),
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name: beginFields.name ?? '',
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part: toInt(beginFields, 'part'),
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total: toInt(beginFields, 'total'),
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}
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if (!begin.name) throw new YencError('Missing "name" in =ybegin line')
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let dataStart = beginLine.next
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let part: YencPart | undefined
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if (body.subarray(dataStart, dataStart + PART.length).equals(PART)) {
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const partLine = lineAt(body, dataStart)
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const partFields = parseFields(partLine.text)
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part = { begin: toInt(partFields, 'begin', true), end: toInt(partFields, 'end', true) }
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dataStart = partLine.next
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}
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const endIndex = body.lastIndexOf(END)
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if (endIndex === -1 || endIndex < dataStart - CRLF.length) {
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throw new YencError('No =yend line found')
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}
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const endFields = parseFields(lineAt(body, endIndex + CRLF.length).text)
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const end: YencEnd = {
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size: toInt(endFields, 'size', true),
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part: toInt(endFields, 'part'),
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pcrc32: toCrc(endFields, 'pcrc32'),
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crc32: toCrc(endFields, 'crc32'),
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}
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return { begin, part, end, dataStart, dataEnd: Math.max(dataStart, endIndex) }
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}
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