jacy
0692bebf07
Xiaofeixia posts multipart form fields; previously mis-read as urlencoded empty payload. Parse multipart text parts and map into order status transitions. Co-authored-by: Cursor <cursoragent@cursor.com>
110 lines
3.6 KiB
TypeScript
110 lines
3.6 KiB
TypeScript
import { parse as parseQueryString } from 'node:querystring';
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/**
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* 小飞侠路由回调实际推送多为 multipart/form-data（非 JSON / urlencoded）。
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* 解析失败时保留 _rawText，便于第三方日志排查。
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*/
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export function parseCourierCallbackBody(
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rawText: string,
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contentType: string,
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): Record<string, unknown> {
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const ct = contentType.toLowerCase();
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const trimmed = rawText.trim();
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if (!trimmed) return {};
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if (ct.includes('multipart/form-data') || looksLikeMultipart(trimmed)) {
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const multipart = parseMultipartFormData(rawText, contentType);
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if (multipart && Object.keys(multipart).length > 0) return multipart;
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}
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if (ct.includes('application/json') || trimmed.startsWith('{') || trimmed.startsWith('[')) {
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try {
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const parsed = JSON.parse(trimmed) as unknown;
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return parsed && typeof parsed === 'object'
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? (parsed as Record<string, unknown>)
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: { value: parsed };
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} catch {
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return { _rawText: rawText.slice(0, 4000) };
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}
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}
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if (ct.includes('application/x-www-form-urlencoded') || looksLikeUrlEncoded(trimmed)) {
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return flattenQueryValues(parseQueryString(trimmed));
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}
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return { _rawText: rawText.slice(0, 4000) };
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}
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function looksLikeMultipart(raw: string): boolean {
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return raw.startsWith('--') && /Content-Disposition:\s*form-data/i.test(raw);
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}
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function looksLikeUrlEncoded(raw: string): boolean {
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if (looksLikeMultipart(raw)) return false;
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return /^[^=&\s]+=/.test(raw) && !raw.includes('\n');
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}
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function flattenQueryValues(
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parsed: Record<string, string | string[] | undefined>,
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): Record<string, unknown> {
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const out: Record<string, unknown> = {};
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for (const [key, value] of Object.entries(parsed)) {
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if (Array.isArray(value)) out[key] = value[value.length - 1];
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else if (value !== undefined) out[key] = value;
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}
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return out;
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}
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/** 仅解析文本字段（小飞侠回调无文件） */
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export function parseMultipartFormData(
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rawText: string,
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contentType: string,
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): Record<string, unknown> | null {
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const boundary = extractBoundary(contentType, rawText);
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if (!boundary) return null;
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const delimiter = `--${boundary}`;
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const parts = rawText.split(delimiter);
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const result: Record<string, unknown> = {};
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for (const part of parts) {
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const trimmedPart = part.replace(/^\r?\n/, '').replace(/\r?\n$/, '');
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if (!trimmedPart || trimmedPart === '--' || trimmedPart.startsWith('--')) continue;
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let headers = '';
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let body = '';
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const crlfIdx = trimmedPart.indexOf('\r\n\r\n');
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const lfIdx = trimmedPart.indexOf('\n\n');
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if (crlfIdx >= 0 && (lfIdx < 0 || crlfIdx <= lfIdx)) {
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headers = trimmedPart.slice(0, crlfIdx);
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body = trimmedPart.slice(crlfIdx + 4);
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} else if (lfIdx >= 0) {
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headers = trimmedPart.slice(0, lfIdx);
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body = trimmedPart.slice(lfIdx + 2);
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} else {
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continue;
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}
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body = body.replace(/\r?\n$/, '');
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const nameMatch = /Content-Disposition:[^\r\n]*;\s*name="([^"]+)"/i.exec(headers);
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if (!nameMatch?.[1]) continue;
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if (/filename=/i.test(headers)) continue;
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result[nameMatch[1]] = body;
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}
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return Object.keys(result).length > 0 ? result : null;
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}
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function extractBoundary(contentType: string, rawText: string): string | null {
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const fromHeader = /boundary=(?:"([^"]+)"|([^;\s]+))/i.exec(contentType);
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if (fromHeader?.[1] || fromHeader?.[2]) {
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return (fromHeader[1] || fromHeader[2] || '').trim() || null;
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}
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const firstLine = rawText.split(/\r?\n/, 1)[0]?.trim() ?? '';
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if (firstLine.startsWith('--') && firstLine.length > 2) {
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return firstLine.slice(2).replace(/--$/, '') || null;
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}
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return null;
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}
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