133 lines
5.8 KiB
JavaScript
133 lines
5.8 KiB
JavaScript
'use strict';
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/**
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* MIME 层单元测试（纯本地，不联网）。
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* 这一层是「中文对不对」的关键，所以要有可回归的测试。
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* 真机踩过的坑（都已固化为用例）：
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* - RFC 2231 的 filename* 若先 decodeURIComponent 再 Buffer.from(str,'binary')，
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* 多字节字符会被截断成 U+FFFD → 中文附件名变乱码
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* - ENVELOPE / 头部的编码字必须解 RFC 2047，否则界面显示 =?UTF-8?B?...?=
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* - 裸 UTF-8 头部要按 UTF-8 优先解，否则变 [æµè¯]
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*/
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const mime = require('../server/mime');
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const results = [];
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function check(name, actual, expected) {
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const ok = actual === expected;
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results.push({ name, ok, actual, expected });
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process.stdout.write(`${ok ? 'PASS' : 'FAIL'} ${name}\n`);
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if (!ok) process.stdout.write(` 期望 ${JSON.stringify(expected)}\n 实际 ${JSON.stringify(actual)}\n`);
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}
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/** 生成 RFC 2047 的 B 编码字（测试里按需现算，避免手写 base64 写错） */
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function b64word(text) {
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return `=?UTF-8?B?${Buffer.from(text, 'utf8').toString('base64')}?=`;
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}
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// ── 1. 附件文件名
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// encoding 用来模拟报文里的真实字节：正常头部是 ASCII/Latin-1，而「裸 UTF-8」头部要按 UTF-8 装字节
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function fname(headerLine, encoding = 'latin1') {
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const headers = mime.parseHeaders(Buffer.from(headerLine, encoding));
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return mime.filenameFrom(headers);
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}
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check('filename* RFC2231 中文（真机报文原样）',
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fname('Content-Disposition: attachment; filename="____.txt"; filename*=UTF-8\'\'%E9%AA%8C%E6%94%B6%E9%99%84%E4%BB%B6.txt'),
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'验收附件.txt');
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check('filename* 在 Content-Type 的 name*',
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fname('Content-Type: application/octet-stream; name*=UTF-8\'\'%E4%B8%AD%E6%96%87.zip'),
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'中文.zip');
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check('普通 ASCII 文件名',
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fname('Content-Disposition: attachment; filename="report.pdf"'),
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'report.pdf');
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check('裸 UTF-8 中文文件名（未做编码的历史客户端）',
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fname('Content-Disposition: attachment; filename="原始中文名.txt"', 'utf8'),
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'原始中文名.txt');
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check('RFC 2231 分段续行 filename*0* / filename*1*',
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fname("Content-Disposition: attachment; filename*0*=UTF-8''%E9%AA%8C%E6%94%B6; filename*1*=%E9%99%84%E4%BB%B6.txt"),
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'验收附件.txt');
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// ── 2. RFC 2047 编码字
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check('B 编码字（中文主题）',
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mime.decodeWords('=?UTF-8?B?5a6i5oi356uv6Ieq5rWL?='),
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'客户端自测');
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check('Q 编码字（下划线代表空格）',
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mime.decodeWords('=?utf-8?Q?=E4=BD=A0=E5=A5=BD_=E4=B8=96=E7=95=8C?='),
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'你好 世界');
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check('相邻编码字之间的空白被丢弃（RFC 2047）',
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mime.decodeWords('=?UTF-8?B?5a6i5oi3?= =?UTF-8?B?56uv6Ieq5rWL?='),
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'客户端自测');
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check('编码字与纯文本混排',
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mime.decodeWords('Report for ' + b64word('客户') + ' end'),
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'Report for 客户 end');
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// ── 3. 裸 UTF-8 头部（历史客户端常见）
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{
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const raw = Buffer.from('Subject: 中文主题', 'utf8').toString('latin1');
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check('裸 UTF-8 头部按 UTF-8 优先解', mime.smartDecodeHeader(raw.slice(9)), '中文主题');
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}
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// ── 4. 组装 → 解析 往返（含中文与全角标点）
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{
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const text = '你好，世界。（）《》——、；：！？\r\n第二行中文。';
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const raw = mime.buildMessage({
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from: { name: '测试 发件人', address: '[email protected]' },
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to: [{ name: '收件人', address: '[email protected]' }],
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subject: '中文主题 with ASCII · 标点测试',
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text,
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domain: 'wpy.email',
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});
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const parsed = mime.parseMessage(raw);
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check('往返：主题', parsed.subject, '中文主题 with ASCII · 标点测试');
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check('往返：发件人显示名', parsed.from[0].name, '测试 发件人');
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check('往返：收件人地址', parsed.to[0].address, '[email protected]');
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// 解析出的正文统一用 LF（界面以 pre-wrap 渲染，LF 才是 DOM 的自然换行）
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check('往返：正文（含全角标点）', parsed.text, text.replace(/\r\n/g, '\n'));
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check('往返：头部不含裸非 ASCII（可安全过 SMTP）',
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/^[\x00-\x7f]*$/.test(raw.subarray(0, raw.indexOf('\r\n\r\n')).toString('latin1')), true);
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}
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// ── 5. 带附件往返
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{
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const content = Buffer.from('中文附件内容 123', 'utf8');
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const raw = mime.buildMessage({
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from: { name: 'W', address: '[email protected]' },
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to: [{ name: '', address: '[email protected]' }],
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subject: '带附件',
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text: '正文',
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domain: 'wpy.email',
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attachments: [{ filename: '验收附件.txt', contentType: 'text/plain', content }],
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});
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const parsed = mime.parseMessage(raw);
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check('往返：附件数量', String(parsed.attachments.length), '1');
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check('往返：附件名（中文）', parsed.attachments[0].filename, '验收附件.txt');
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check('往返：附件内容逐字节一致', String(parsed.attachments[0].content.equals(content)), 'true');
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check('往返：正文仍可读', parsed.text, '正文');
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}
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// ── 6. 字符集
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check('GBK 正文解码', mime.decodeCharset(Buffer.from([0xC4, 0xE3, 0xBA, 0xC3]), 'gbk'), '你好');
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check('quoted-printable 解码', mime.decodeCharset(mime.decodeQuotedPrintable(Buffer.from('=E4=BD=A0=E5=A5=BD', 'latin1')), 'utf-8'), '你好');
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check('base64 传输解码', mime.decodeCharset(mime.decodeTransfer(Buffer.from(Buffer.from('你好', 'utf8').toString('base64'), 'latin1'), 'base64'), 'utf-8'), '你好');
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// ── 7. 地址解析
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{
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const list = mime.parseAddressList('"张三, 三" <[email protected]>, 李四 <[email protected]>, [email protected]');
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check('地址解析数量', String(list.length), '3');
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check('地址解析：引号内含逗号', list[0].name, '张三, 三');
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check('地址解析：裸地址', list[2].address, '[email protected]');
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}
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const pass = results.filter((r) => r.ok).length;
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const fail = results.length - pass;
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process.stdout.write(`\n汇总：通过 ${pass} / ${results.length}，失败 ${fail}\n`);
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process.exit(fail ? 1 : 0);
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