forked from
chadtmiller.com/pds.js
A zero-dependency AT Protocol Personal Data Server written in JavaScript
feat: add deterministic CBOR encoding
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
+68
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src/pds.js
+68
src/pds.js
···
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// === CBOR ENCODING ===
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// Minimal deterministic CBOR (RFC 8949) - sorted keys, minimal integers
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function cborEncode(value) {
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const parts = []
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function encode(val) {
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if (val === null) {
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parts.push(0xf6) // null
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} else if (val === true) {
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parts.push(0xf5) // true
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} else if (val === false) {
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parts.push(0xf4) // false
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} else if (typeof val === 'number') {
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encodeInteger(val)
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} else if (typeof val === 'string') {
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const bytes = new TextEncoder().encode(val)
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encodeHead(3, bytes.length) // major type 3 = text string
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parts.push(...bytes)
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} else if (val instanceof Uint8Array) {
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encodeHead(2, val.length) // major type 2 = byte string
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parts.push(...val)
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} else if (Array.isArray(val)) {
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encodeHead(4, val.length) // major type 4 = array
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for (const item of val) encode(item)
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} else if (typeof val === 'object') {
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// Sort keys for deterministic encoding
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const keys = Object.keys(val).sort()
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encodeHead(5, keys.length) // major type 5 = map
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for (const key of keys) {
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encode(key)
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encode(val[key])
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}
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}
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}
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function encodeHead(majorType, length) {
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const mt = majorType << 5
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if (length < 24) {
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parts.push(mt | length)
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} else if (length < 256) {
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parts.push(mt | 24, length)
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} else if (length < 65536) {
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parts.push(mt | 25, length >> 8, length & 0xff)
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} else if (length < 4294967296) {
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parts.push(mt | 26, (length >> 24) & 0xff, (length >> 16) & 0xff, (length >> 8) & 0xff, length & 0xff)
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}
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}
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function encodeInteger(n) {
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if (n >= 0) {
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encodeHead(0, n) // major type 0 = unsigned int
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} else {
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encodeHead(1, -n - 1) // major type 1 = negative int
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}
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}
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encode(value)
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return new Uint8Array(parts)
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}
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export class PersonalDataServer {
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constructor(state, env) {
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this.state = state
···
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}
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async fetch(request) {
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const url = new URL(request.url)
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if (url.pathname === '/test/cbor') {
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const encoded = cborEncode({ hello: 'world', num: 42 })
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return new Response(encoded, {
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headers: { 'content-type': 'application/cbor' }
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})
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}
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return new Response('pds running', { status: 200 })
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}
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}