adding home page

2026-07-21 10:53:02 -05:00
parent 4e7e86a3be
commit 0e9131dafa
4 changed files with 130 additions and 1 deletions
@@ -0,0 +1,92 @@
+function escapeHtml(value) {
+  return value
+    .replaceAll('&', '&amp;')
+    .replaceAll('<', '&lt;')
+    .replaceAll('>', '&gt;')
+    .replaceAll('"', '&quot;')
+    .replaceAll("'", '&#39;');
+}
+
+function inlineMarkdown(value) {
+  let html = escapeHtml(value);
+  html = html.replace(/\[([^\]]+)\]\((https?:\/\/[^\s)]+)\)/g, '<a href="$2">$1</a>');
+  html = html.replace(/`([^`]+)`/g, '<code>$1</code>');
+  html = html.replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>');
+  return html;
+}
+
+export function renderMarkdown(markdown) {
+  const lines = markdown.replaceAll('\r\n', '\n').split('\n');
+  const output = [];
+  let paragraph = [];
+  let list = [];
+  let code = null;
+
+  const flushParagraph = () => {
+    if (paragraph.length) {
+      output.push(`<p>${inlineMarkdown(paragraph.join(' '))}</p>`);
+      paragraph = [];
+    }
+  };
+  const flushList = () => {
+    if (list.length) {
+      output.push(`<ul>${list.map((item) => `<li>${inlineMarkdown(item)}</li>`).join('')}</ul>`);
+      list = [];
+    }
+  };
+
+  for (const line of lines) {
+    if (code) {
+      if (line.startsWith('```')) {
+        output.push(`<pre><code>${escapeHtml(code.join('\n'))}</code></pre>`);
+        code = null;
+      } else {
+        code.push(line);
+      }
+      continue;
+    }
+
+    if (line.startsWith('```')) {
+      flushParagraph();
+      flushList();
+      code = [];
+    } else if (/^#{1,6} /.test(line)) {
+      flushParagraph();
+      flushList();
+      const [, hashes, heading] = line.match(/^(#{1,6}) (.+)$/);
+      output.push(`<h${hashes.length}>${inlineMarkdown(heading)}</h${hashes.length}>`);
+    } else if (/^- /.test(line)) {
+      flushParagraph();
+      list.push(line.slice(2));
+    } else if (line.trim() === '') {
+      flushParagraph();
+      flushList();
+    } else {
+      flushList();
+      paragraph.push(line.trim());
+    }
+  }
+
+  if (code) output.push(`<pre><code>${escapeHtml(code.join('\n'))}</code></pre>`);
+  flushParagraph();
+  flushList();
+  return output.join('\n');
+}
+
+export function renderPage(markdown, { title = 'OpenCode Go Proxy' } = {}) {
+  return `<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>${escapeHtml(title)}</title>
+    <style>
+      :root { color-scheme: dark; font-family: system-ui, sans-serif; }
+      body { max-width: 50rem; margin: 0 auto; padding: 3rem 1.25rem; background: #101114; color: #f1f3f5; line-height: 1.6; }
+      a { color: #8ab4ff; } code { padding: .15rem .35rem; background: #252830; border-radius: .25rem; }
+      pre { overflow-x: auto; padding: 1rem; background: #191b21; border-radius: .5rem; }
+    </style>
+  </head>
+  <body>${renderMarkdown(markdown)}</body>
+</html>`;
+}
@@ -1,5 +1,9 @@
 import { Readable } from 'node:stream';
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
 import express from 'express';
+import { renderPage } from './markdown.js';
 import { createKeyRotator } from './key-store.js';
 import { clientIp, createRateLimiter, numericCost, rateLimitError } from './rate-limit.js';
 import {
@@ -26,6 +30,7 @@ async function forwardError(upstream, response) {
 }

 export const DEFAULT_MAX_CONTEXT_TOKENS = 262144;
+const defaultPagesDirectory = path.join(path.dirname(fileURLToPath(import.meta.url)), '..', 'pages');

 function maxContextFromEnv(value = process.env.MAX_CONTEXT_TOKENS) {
  if (value === undefined) return DEFAULT_MAX_CONTEXT_TOKENS;
@@ -54,11 +59,20 @@ function withContextLimit(payload, maxContextTokens) {
  };
 }

-export function createProxyApp({ keys, fetchImpl = globalThis.fetch, upstreamBaseUrl = DEFAULT_UPSTREAM_BASE_URL, maxContextTokens = maxContextFromEnv(), rateLimiter = createRateLimiter() } = {}) {
+export function createProxyApp({ keys, fetchImpl = globalThis.fetch, upstreamBaseUrl = DEFAULT_UPSTREAM_BASE_URL, maxContextTokens = maxContextFromEnv(), rateLimiter = createRateLimiter(), pagesDirectory = defaultPagesDirectory } = {}) {
  const rotator = createKeyRotator(keys);
  const app = express();
  app.use(express.json({ limit: '10mb' }));

+  app.get('/', (_request, response) => {
+    try {
+      const markdown = fs.readFileSync(path.join(pagesDirectory, 'index.md'), 'utf8');
+      response.type('html').send(renderPage(markdown));
+    } catch (error) {
+      response.status(404).send('Page not found');
+    }
+  });
+
  async function fetchWithKeyRetries(url, options = {}) {
    let lastError;