77019ec050
添加完整的微信插件测试框架，包含： - 微信插件源码（weixin-plugin/） - TypeScript 类型定义（types.ts） - 插件编译脚本（scripts/build-weixin-plugin.sh） - 简化测试脚本（scripts/test-weixin-simple.js） - 完整测试脚本（scripts/test-weixin-plugin.js） - 项目配置和依赖管理（package.json） - 使用说明文档（README.md） 主要功能： - 支持二维码登录认证 - HTTP 长轮询消息接收 - 文本、图片、视频、文件消息收发 - 自动回复测试 - 运行状态统计 Generated with [Claude Code](https://claude.com/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
86 lines
3.0 KiB
TypeScript
86 lines
3.0 KiB
TypeScript
import { decryptAesEcb } from "./aes-ecb.js";
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import { buildCdnDownloadUrl } from "./cdn-url.js";
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import { logger } from "../util/logger.js";
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/**
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* Download raw bytes from the CDN (no decryption).
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*/
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async function fetchCdnBytes(url: string, label: string): Promise<Buffer> {
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let res: Response;
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try {
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res = await fetch(url);
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} catch (err) {
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const cause =
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(err as NodeJS.ErrnoException).cause ?? (err as NodeJS.ErrnoException).code ?? "(no cause)";
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logger.error(
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`${label}: fetch network error url=${url} err=${String(err)} cause=${String(cause)}`,
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);
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throw err;
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}
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logger.debug(`${label}: response status=${res.status} ok=${res.ok}`);
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if (!res.ok) {
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const body = await res.text().catch(() => "(unreadable)");
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const msg = `${label}: CDN download ${res.status} ${res.statusText} body=${body}`;
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logger.error(msg);
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throw new Error(msg);
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}
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return Buffer.from(await res.arrayBuffer());
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}
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/**
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* Parse CDNMedia.aes_key into a raw 16-byte AES key.
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*
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* Two encodings are seen in the wild:
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* - base64(raw 16 bytes) → images (aes_key from media field)
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* - base64(hex string of 16 bytes) → file / voice / video
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*
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* In the second case, base64-decoding yields 32 ASCII hex chars which must
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* then be parsed as hex to recover the actual 16-byte key.
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*/
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function parseAesKey(aesKeyBase64: string, label: string): Buffer {
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const decoded = Buffer.from(aesKeyBase64, "base64");
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if (decoded.length === 16) {
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return decoded;
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}
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if (decoded.length === 32 && /^[0-9a-fA-F]{32}$/.test(decoded.toString("ascii"))) {
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// hex-encoded key: base64 → hex string → raw bytes
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return Buffer.from(decoded.toString("ascii"), "hex");
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}
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const msg = `${label}: aes_key must decode to 16 raw bytes or 32-char hex string, got ${decoded.length} bytes (base64="${aesKeyBase64}")`;
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logger.error(msg);
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throw new Error(msg);
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}
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/**
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* Download and AES-128-ECB decrypt a CDN media file. Returns plaintext Buffer.
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* aesKeyBase64: CDNMedia.aes_key JSON field (see parseAesKey for supported formats).
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*/
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export async function downloadAndDecryptBuffer(
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encryptedQueryParam: string,
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aesKeyBase64: string,
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cdnBaseUrl: string,
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label: string,
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): Promise<Buffer> {
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const key = parseAesKey(aesKeyBase64, label);
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const url = buildCdnDownloadUrl(encryptedQueryParam, cdnBaseUrl);
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logger.debug(`${label}: fetching url=${url}`);
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const encrypted = await fetchCdnBytes(url, label);
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logger.debug(`${label}: downloaded ${encrypted.byteLength} bytes, decrypting`);
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const decrypted = decryptAesEcb(encrypted, key);
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logger.debug(`${label}: decrypted ${decrypted.length} bytes`);
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return decrypted;
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}
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/**
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* Download plain (unencrypted) bytes from the CDN. Returns the raw Buffer.
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*/
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export async function downloadPlainCdnBuffer(
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encryptedQueryParam: string,
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cdnBaseUrl: string,
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label: string,
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): Promise<Buffer> {
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const url = buildCdnDownloadUrl(encryptedQueryParam, cdnBaseUrl);
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logger.debug(`${label}: fetching url=${url}`);
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return fetchCdnBytes(url, label);
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}
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