Initial commit: ASPEKTER — визуальный конструктор email-рассылок
- z51-pug-builder: Svelte 5 SPA, визуальный редактор Pug-писем - email-gen: Node.js рендерер Pug→HTML через email-templates + Juice - email-gen-api: HTTP сервер рендеринга (порт 8787) - coin-scout: сервис подбора монет из фидов - Docker Compose для dev/prod - Nginx конфиг с SSL для app.aspekter.ru
This commit is contained in:
244
deploy/email-gen-api/server.js
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244
deploy/email-gen-api/server.js
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const http = require('http')
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const fs = require('fs')
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const path = require('path')
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const crypto = require('crypto')
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const { spawnSync } = require('child_process')
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const PORT = Number(process.env.PORT || 8787)
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const EMAIL_GEN_ROOT = path.resolve(process.env.EMAIL_GEN_ROOT || '/workspace/email-gen')
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function send(res, status, payload) {
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res.statusCode = status
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res.setHeader('Content-Type', 'application/json')
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res.end(JSON.stringify(payload))
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}
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const MAX_BODY_SIZE = 5 * 1024 * 1024
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function readBody(req) {
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return new Promise((resolve) => {
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let size = 0
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let data = ''
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req.on('data', (chunk) => {
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size += chunk.length
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if (size <= MAX_BODY_SIZE) data += chunk
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})
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req.on('end', () => {
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if (size > MAX_BODY_SIZE) return resolve({})
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try {
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resolve(data ? JSON.parse(data) : {})
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} catch {
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resolve({})
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}
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})
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req.on('error', () => resolve({}))
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})
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}
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function sanitizeProjectSlug(value) {
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return String(value || '').trim().replace(/[^a-zA-Z0-9_-]/g, '')
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}
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function validatePugSafety(pug) {
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const dangerous = [
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/\brequire\s*\(/i,
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/\bprocess\b/,
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/\bchild_process\b/,
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/\bexecSync\b/,
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/\bexec\s*\(/,
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/\bspawn\s*\(/,
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/\beval\s*\(/,
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/\bFunction\s*\(/,
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/\bnew\s+Function\b/,
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/\bglobal\b/,
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/\b__dirname\b/,
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/\b__filename\b/,
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/\bfs\s*\./,
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/\bBuffer\b/,
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]
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for (const re of dangerous) {
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if (re.test(pug)) {
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return { safe: false, pattern: re.source }
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}
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}
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return { safe: true }
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}
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function ensureBuilderPreviewTemplate(projectDir) {
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const templateName = '__builder_preview__.pug'
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const templatePath = path.resolve(projectDir, templateName)
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const templateBody = [
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'extends ./html.pug',
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'',
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'block content',
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' include ./letters/let.pug',
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'',
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].join('\n')
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fs.writeFileSync(templatePath, templateBody, 'utf-8')
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return { templateName, templatePath }
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}
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function ensureNpmDeps() {
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const marker = path.resolve(EMAIL_GEN_ROOT, 'node_modules')
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if (fs.existsSync(marker)) return
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const install = spawnSync('npm', ['install'], {
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cwd: EMAIL_GEN_ROOT,
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encoding: 'utf-8',
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shell: false,
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})
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if (install.status !== 0) {
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throw new Error((install.stderr || install.stdout || 'npm install failed').trim())
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}
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}
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function renderWithNode(projectSlug, renderTemplate = 'html') {
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const outFileName = `render_${crypto.randomBytes(16).toString('hex')}.html`
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const script = `
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const path = require('path');
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const fs = require('fs');
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const Email = require('email-templates');
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async function run() {
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const project = process.argv[1];
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const renderTemplate = process.argv[2];
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const root = process.argv[3];
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const outFile = process.argv[4];
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const email = new Email();
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const html = await email.render({
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path: project + '/' + renderTemplate,
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juiceResources: {
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preserveImportant: true,
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applyStyleTags: true,
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removeStyleTags: true,
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preserveMediaQueries: true,
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webResources: {
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relativeTo: path.resolve(root, 'emails', project)
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}
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},
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}, { pretty: true });
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const outDir = path.resolve(root, 'public');
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if (!fs.existsSync(outDir)) fs.mkdirSync(outDir, { recursive: true });
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const outPath = path.resolve(outDir, outFile);
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const normalized = String(html).replace('#MAILRU_PREHEADER_TAG#', '<vk-snippet-end/>');
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fs.writeFileSync(outPath, normalized, 'utf-8');
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}
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run().catch((error) => {
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console.error(error && error.stack ? error.stack : String(error));
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process.exit(1);
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});
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`
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const run = spawnSync(process.execPath, ['-e', script, projectSlug, renderTemplate, EMAIL_GEN_ROOT, outFileName], {
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cwd: EMAIL_GEN_ROOT,
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encoding: 'utf-8',
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shell: false,
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timeout: 120000,
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})
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if (run.error || run.status !== 0) {
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throw new Error((run.stderr || run.stdout || run.error?.message || 'render failed').trim())
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}
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return outFileName
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}
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function applyNowrap(html) {
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const templatePlaceholders = []
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let protected_ = html.replace(/@\{[^}]*\}/g, (m) => {
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templatePlaceholders.push(m)
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return `\u200BTPL${templatePlaceholders.length - 1}\u200B`
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})
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function wrapShort(text) {
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return text.replace(
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/(?<![a-zA-Zа-яА-ЯёЁ])([a-zA-Zа-яА-ЯёЁ]{1,3})(?:\s| )+(\S+)/gu,
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'\u200Bspan\u200Bnwr\u200B$1\u00A0$2\u200B/span\u200Bnwr\u200B'
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)
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}
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const result = protected_.replace(
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/(<span[^>]*class="[^"]*\bh3\b[^"]*"[^>]*>)([\s\S]*?)(<\/span><\/td>)/gi,
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(_match, open, content, close) => {
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const processed = content.replace(/>([^<]+)</g, (m, t) => '>' + wrapShort(t) + '<')
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const firstText = processed.replace(/^([^<]+)/, (m) => wrapShort(m))
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return open + firstText + close
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}
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)
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return result
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.replace(/\u200Bspan\u200Bnwr\u200B/g, '<span style="white-space:nowrap">')
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.replace(/\u200B\/span\u200Bnwr\u200B/g, '</span>')
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.replace(/\u200BTPL(\d+)\u200B/g, (_, i) => templatePlaceholders[parseInt(i)])
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}
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const server = http.createServer(async (req, res) => {
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if (req.method === 'GET' && req.url === '/health') {
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return send(res, 200, { ok: true })
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}
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if (req.method === 'POST' && req.url === '/render') {
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const body = await readBody(req)
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const projectSlug = sanitizeProjectSlug(body.projectSlug)
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const pug = String(body.pug || '')
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if (!projectSlug) return send(res, 400, { error: 'missing_project_slug', details: 'Project slug required' })
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if (!pug.trim()) return send(res, 400, { error: 'missing_pug', details: 'PUG required' })
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if (!fs.existsSync(EMAIL_GEN_ROOT)) {
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return send(res, 500, { error: 'email_gen_not_found', details: 'email-gen root missing' })
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}
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const emailsRoot = path.resolve(EMAIL_GEN_ROOT, 'emails')
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const projectDir = path.resolve(emailsRoot, projectSlug)
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if (!projectDir.startsWith(emailsRoot)) {
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return send(res, 400, { error: 'invalid_project_slug', details: 'Invalid project slug' })
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}
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if (!fs.existsSync(projectDir)) {
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return send(res, 404, { error: 'email_project_not_found', details: `Project ${projectSlug} not found` })
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}
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const pugCheck = validatePugSafety(pug)
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if (!pugCheck.safe) {
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return send(res, 400, { error: 'unsafe_pug', details: `Dangerous pattern detected: ${pugCheck.pattern}` })
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}
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try {
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ensureNpmDeps()
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const lettersDir = path.resolve(projectDir, 'letters')
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if (!fs.existsSync(lettersDir)) fs.mkdirSync(lettersDir, { recursive: true })
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fs.writeFileSync(path.resolve(lettersDir, 'let.pug'), pug, 'utf-8')
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const { templateName, templatePath } = ensureBuilderPreviewTemplate(projectDir)
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let outFileName
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try {
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outFileName = renderWithNode(projectSlug, templateName.replace(/\.pug$/, ''))
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} finally {
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if (fs.existsSync(templatePath)) fs.unlinkSync(templatePath)
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}
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const htmlPath = path.resolve(EMAIL_GEN_ROOT, 'public', outFileName)
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if (!fs.existsSync(htmlPath)) {
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return send(res, 500, { error: 'preview_not_found', details: 'Rendered file not found' })
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}
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const rawHtml = fs.readFileSync(htmlPath, 'utf-8')
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try { fs.unlinkSync(htmlPath) } catch (_) {}
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const html = applyNowrap(rawHtml)
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return send(res, 200, {
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html,
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generatedAt: new Date().toISOString(),
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})
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} catch (error) {
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return send(res, 500, {
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error: 'render_failed',
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details: error?.message || 'Unknown render error',
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})
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}
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}
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return send(res, 404, { error: 'not_found' })
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})
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server.listen(PORT, () => {
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console.log(`email-gen-api listening on :${PORT}`)
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console.log(`email-gen root: ${EMAIL_GEN_ROOT}`)
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})
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