Codex
74 lines
2.1 KiB
TypeScript
74 lines
2.1 KiB
TypeScript
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const DEFAULT_BODY_LIMIT_BYTES = 1024 * 1024;
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export function readBody(request, limitBytes = DEFAULT_BODY_LIMIT_BYTES) {
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const limit = Number.isInteger(limitBytes) && limitBytes > 0 ? limitBytes : DEFAULT_BODY_LIMIT_BYTES;
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return new Promise((resolve, reject) => {
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let body = "";
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request.setEncoding("utf8");
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request.on("data", (chunk) => {
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body += chunk;
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if (Buffer.byteLength(body, "utf8") > limit) {
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request.destroy(new Error(`request body exceeds ${limit} bytes`));
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}
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});
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request.on("end", () => resolve(body));
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request.on("error", reject);
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});
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}
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export function sendJson(response, statusCode, body) {
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response.writeHead(statusCode, {
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"content-type": "application/json; charset=utf-8",
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"cache-control": "no-store"
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});
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response.end(JSON.stringify(body) + "\n");
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}
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export function getHeader(request, name) {
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const value = request.headers[name.toLowerCase()];
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if (Array.isArray(value)) return value[0];
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return value;
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}
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export function firstHeaderValue(request, name) {
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return getHeader(request, name);
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}
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export function truthyFlag(value) {
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return /^(?:1|true|yes|on|enabled)$/iu.test(String(value ?? "").trim());
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}
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export function safeTraceId(value) {
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const text = String(value ?? "").trim();
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return /^trc_[A-Za-z0-9_.:-]+$/u.test(text) ? text : null;
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}
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export function safeSessionId(value) {
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const text = String(value ?? "").trim();
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return /^ses_[A-Za-z0-9_.:-]+$/u.test(text) ? text : null;
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}
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export function safeConversationId(value) {
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const text = String(value ?? "").trim();
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return /^cnv_[A-Za-z0-9_.:-]+$/u.test(text) ? text : null;
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}
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export function safeOpaqueId(value) {
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const text = String(value ?? "").trim();
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return /^[A-Za-z0-9_.:-]{3,180}$/u.test(text) ? text : null;
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}
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export function parsePositiveInteger(value, fallback) {
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const parsed = Number.parseInt(value ?? "", 10);
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return Number.isInteger(parsed) && parsed > 0 ? parsed : fallback;
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}
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export function positiveInteger(value, fallback) {
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const parsed = Number.parseInt(value ?? "", 10);
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return Number.isInteger(parsed) && parsed > 0 ? parsed : fallback;
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}
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