214 lines
7.8 KiB
Python
214 lines
7.8 KiB
Python
#!/usr/bin/env python3
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"""极简博客 —— 单文件 Flask 应用，文章以 JSON 存在 PVC 上。"""
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import os
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import json
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import re
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import html
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import datetime
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import markdown
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from flask import Flask, request, redirect, abort, render_template_string
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DATA_DIR = os.environ.get("DATA_DIR", "/data")
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DB_FILE = os.path.join(DATA_DIR, "posts.json")
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ADMIN_TOKEN = os.environ.get("ADMIN_TOKEN", "change-me")
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SITE_TITLE = os.environ.get("SITE_TITLE", "我的博客")
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app = Flask(__name__)
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def load_posts():
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if not os.path.exists(DB_FILE):
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return []
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try:
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with open(DB_FILE, encoding="utf-8") as f:
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posts = json.load(f)
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return sorted(posts, key=lambda p: p.get("created", ""), reverse=True)
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except (json.JSONDecodeError, OSError):
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return []
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def save_posts(posts):
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os.makedirs(DATA_DIR, exist_ok=True)
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tmp = DB_FILE + ".tmp"
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with open(tmp, "w", encoding="utf-8") as f:
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json.dump(posts, f, ensure_ascii=False, indent=2)
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os.replace(tmp, DB_FILE)
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def slugify(text):
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slug = re.sub(r"[^\w\u4e00-\u9fff-]+", "-", text.strip().lower()).strip("-")
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return slug[:60] or "post"
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BASE_CSS = """
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<style>
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:root{--fg:#1a1a1a;--muted:#666;--line:#e5e5e5;--accent:#0b6bcb}
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*{box-sizing:border-box}
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body{margin:0;font:16px/1.75 -apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
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color:var(--fg);background:#fafafa}
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.wrap{max-width:760px;margin:0 auto;padding:48px 24px 96px}
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header.site{margin-bottom:48px;display:flex;justify-content:space-between;align-items:baseline;
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border-bottom:1px solid var(--line);padding-bottom:16px}
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header.site h1{font-size:1.6rem;margin:0;letter-spacing:-.02em}
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header.site a{color:var(--muted);text-decoration:none;font-size:.9rem}
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header.site a:hover{color:var(--accent)}
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article.post{background:#fff;border:1px solid var(--line);border-radius:12px;
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padding:24px 28px;margin-bottom:20px}
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article.post h2{margin:0 0 8px;font-size:1.25rem;line-height:1.4}
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article.post h2 a{color:var(--fg);text-decoration:none}
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article.post h2 a:hover{color:var(--accent)}
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.meta{color:var(--muted);font-size:.85rem}
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.excerpt{color:#444;margin:10px 0 0}
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.content{background:#fff;border:1px solid var(--line);border-radius:12px;padding:32px 36px}
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.content h1{margin-top:0}
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.content pre{background:#f5f5f5;padding:16px;border-radius:8px;overflow:auto}
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.content code{background:#f5f5f5;padding:2px 6px;border-radius:4px;font-size:.9em}
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.content pre code{background:none;padding:0}
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.content img{max-width:100%;height:auto;border-radius:8px}
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.content blockquote{border-left:3px solid var(--line);margin:0;padding-left:16px;color:var(--muted)}
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form.new{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px}
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form.new label{display:block;font-size:.85rem;color:var(--muted);margin:14px 0 6px}
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form.new input,form.new textarea{width:100%;padding:10px 12px;border:1px solid var(--line);
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border-radius:8px;font:inherit}
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form.new textarea{min-height:320px;font-family:ui-monospace,Menlo,monospace;font-size:.92rem}
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button{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:10px 20px;
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font:inherit;cursor:pointer;margin-top:18px}
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button:hover{opacity:.9}
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footer{margin-top:64px;color:var(--muted);font-size:.85rem;text-align:center}
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</style>
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"""
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LIST_TPL = """
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<!doctype html><html lang="zh-CN"><head><meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<title>{{ site }}</title>""" + BASE_CSS + """</head><body><div class="wrap">
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<header class="site"><h1>{{ site }}</h1><a href="/new">写文章 →</a></header>
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{% for p in posts %}
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<article class="post">
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<h2><a href="/post/{{ p.slug }}">{{ p.title }}</a></h2>
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<div class="meta">{{ p.created }} · {{ p.views }} 次阅读</div>
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<p class="excerpt">{{ p.excerpt }}</p>
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</article>
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{% else %}
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<article class="post"><p class="meta">还没有文章。点右上角"写文章"开始。</p></article>
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{% endfor %}
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<footer>由 Flask + Kubernetes + Jenkins + Harbor 驱动</footer>
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</div></body></html>
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"""
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POST_TPL = """
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<!doctype html><html lang="zh-CN"><head><meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<title>{{ p.title }} · {{ site }}</title>""" + BASE_CSS + """</head><body><div class="wrap">
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<header class="site"><h1><a href="/" style="color:inherit">{{ site }}</a></h1>
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<a href="/">← 返回列表</a></header>
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<div class="content">
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<h1>{{ p.title }}</h1>
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<div class="meta" style="margin-bottom:24px">{{ p.created }}</div>
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{{ body|safe }}
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</div>
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<footer>阅读 {{ p.views }} 次</footer>
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</div></body></html>
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"""
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NEW_TPL = """
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<!doctype html><html lang="zh-CN"><head><meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<title>写文章 · {{ site }}</title>""" + BASE_CSS + """</head><body><div class="wrap">
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<header class="site"><h1><a href="/" style="color:inherit">{{ site }}</a></h1>
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<a href="/">← 返回列表</a></header>
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{% if error %}<div class="post" style="border-color:#e0b4b4;background:#fff5f5">
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<p class="meta" style="color:#b00">{{ error }}</p></div>{% endif %}
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<form class="new" method="post" action="/new">
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<label>标题</label><input name="title" required maxlength="120" value="{{ title or '' }}">
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<label>正文（支持 Markdown）</label><textarea name="body" required>{{ body or '' }}</textarea>
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<label>管理口令</label><input name="token" type="password" required>
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<button type="submit">发布</button>
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</form>
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</div></body></html>
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"""
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@app.get("/healthz")
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def healthz():
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return "ok", 200
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@app.get("/")
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def index():
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posts = []
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for p in load_posts():
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posts.append({
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"slug": p["slug"],
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"title": p["title"],
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"created": p["created"],
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"views": p.get("views", 0),
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"excerpt": p.get("excerpt", ""),
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})
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return render_template_string(LIST_TPL, site=SITE_TITLE, posts=posts)
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@app.get("/post/<slug>")
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def post_detail(slug):
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posts = load_posts()
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for p in posts:
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if p["slug"] == slug:
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p["views"] = p.get("views", 0) + 1
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save_posts(posts)
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body = markdown.markdown(p["body"], extensions=["fenced_code", "tables"])
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return render_template_string(POST_TPL, site=SITE_TITLE, p=p, body=body)
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abort(404)
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@app.route("/new", methods=["GET", "POST"])
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def new_post():
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if request.method == "GET":
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return render_template_string(NEW_TPL, site=SITE_TITLE, error=None, title="", body="")
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title = (request.form.get("title") or "").strip()
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body = (request.form.get("body") or "").strip()
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token = request.form.get("token") or ""
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if token != ADMIN_TOKEN:
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return render_template_string(NEW_TPL, site=SITE_TITLE,
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error="管理口令不正确", title=title, body=body), 403
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if not title or not body:
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return render_template_string(NEW_TPL, site=SITE_TITLE,
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error="标题和正文都不能为空", title=title, body=body), 400
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posts = load_posts()
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base = slugify(title)
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slug = base
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n = 1
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existing = {p["slug"] for p in posts}
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while slug in existing:
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n += 1
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slug = f"{base}-{n}"
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plain = re.sub(r"[#>*_`\[\]()!-]", "", body)
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posts.append({
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"slug": slug,
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"title": title,
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"body": body,
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"excerpt": html.escape(plain[:120].replace("\n", " ")),
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"created": datetime.datetime.now().strftime("%Y-%m-%d %H:%M"),
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"views": 0,
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})
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save_posts(posts)
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return redirect(f"/post/{slug}")
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@app.post("/post/<slug>/delete")
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def delete_post(slug):
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token = request.form.get("token") or ""
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if token != ADMIN_TOKEN:
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abort(403)
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posts = [p for p in load_posts() if p["slug"] != slug]
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save_posts(posts)
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return redirect("/")
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if __name__ == "__main__":
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app.run(host="0.0.0.0", port=int(os.environ.get("PORT", "5000")))
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