catcher/docs/showcase.html at master · eric8810/catcher · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Catcher — Resilient Network Toolkit for Node.js</title>
<style>
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  /* Scenario Cards */
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  .sc-metric {
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  .sc-metric .win { color: var(--accent2); font-weight: 600; }
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  /* Features */
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  }
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  /* Resilience Layers */
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    gap: 12px;
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    .compare-label { width: 80px; font-size: 11px; }
  }
</style>
</head>
<body>

<!-- ═══ Hero ═══ -->
<section class="hero">
  <div class="logo">🪤</div>
  <h1>Catcher</h1>
  <p class="subtitle">Resilient network toolkit — Rust core, cross-platform. Catches failures before they reach your business logic.</p>
  <div class="tagline">npm install @eric8810/catcher-napi-http @eric8810/catcher-web @eric8810/catcher-http</div>
  <br>
  <a href="#quickstart" class="btn btn-primary">Quick Start ↓</a>
  <p class="subtitle" style="font-size:14px;margin-top:16px">Node.js · Browser · Electron · Rust · Flutter · iOS · Android</p>
</section>

<!-- ═══ Key Metrics ═══ -->
<section class="section">
  <div class="container">
    <h2>Performance at a Glance</h2>
    <p class="desc">500 requests · 50 concurrent · localhost benchmark</p>
    <div class="stats-grid">
      <div class="stat-card">
        <div class="value">+200%</div>
        <div class="label">Throughput (18,519 vs 6,173 req/s) — 3×</div>
      </div>
      <div class="stat-card">
        <div class="value">−61%</div>
        <div class="label">p99 Latency (15ms vs 38ms)</div>
      </div>
      <div class="stat-card">
        <div class="value">+19.8pp</div>
        <div class="label">Success Rate in Extreme Weak Network (98.6% vs 78.8%)</div>
      </div>
      <div class="stat-card">
        <div class="value">100%</div>
        <div class="label">Burst Loss Storm Success Rate</div>
      </div>
    </div>
  </div>
</section>

<!-- ═══ Throughput Comparison ═══ -->
<section class="section" style="padding-top:0">
  <div class="container">
    <h2>Throughput &amp; Latency</h2>
    <p class="desc">500 requests, 50 concurrent — direct connection to local HTTP server</p>

    <div class="compare-row">
      <span class="compare-label">Throughput</span>
      <div class="compare-bars">
        <div class="bar-track"><div class="bar-fill bar-vanilla" style="width:33%">vanilla 6,173 req/s</div></div>
        <div class="bar-track"><div class="bar-fill bar-catcher" style="width:100%" data-width="100">catcher 18,519 req/s</div></div>
      </div>
    </div>
    <div class="compare-row">
      <span class="compare-label">p50 Latency</span>
      <div class="compare-bars">
        <div class="bar-track"><div class="bar-fill bar-vanilla" style="width:100%">vanilla 4ms</div></div>
        <div class="bar-track"><div class="bar-fill bar-catcher" style="width:25%">catcher 1ms</div></div>
      </div>
    </div>
    <div class="compare-row">
      <span class="compare-label">p95 Latency</span>
      <div class="compare-bars">
        <div class="bar-track"><div class="bar-fill bar-vanilla" style="width:100%" data-width="100">vanilla 38ms</div></div>
        <div class="bar-track"><div class="bar-fill bar-catcher" style="width:39%">catcher 15ms</div></div>
      </div>
    </div>
    <div class="compare-row">
      <span class="compare-label">p99 Latency</span>
      <div class="compare-bars">
        <div class="bar-track"><div class="bar-fill bar-vanilla" style="width:100%" data-width="100">vanilla 38ms</div></div>
        <div class="bar-track"><div class="bar-fill bar-catcher" style="width:39%">catcher 15ms</div></div>
      </div>
    </div>
  </div>
</section>

<!-- ═══ Success Rate Under Network Damage ═══ -->
<section class="section">
  <div class="container">
    <h2>Resilience Under Fire</h2>
    <p class="desc">Success rates under simulated real-world network conditions</p>
    <div class="scenario-grid">
      <div class="scenario-card">
        <div class="sc-emoji">🟡</div>
        <h4>Weak Network (2000ms RTT, 5% loss)</h4>
        <div class="sc-metric"><span>vanilla</span><span class="lose">88.2%</span></div>
        <div class="sc-metric"><span>catcher + retry</span><span class="win">99.6% +11.4pp</span></div>
        <div class="sc-metric"><span>Requests</span><span>500</span></div>
      </div>
      <div class="scenario-card">
        <div class="sc-emoji">🔴</div>
        <h4>Very Weak (4000ms RTT, 10% loss)</h4>
        <div class="sc-metric"><span>vanilla</span><span class="lose">78.8%</span></div>
        <div class="sc-metric"><span>catcher + retry</span><span class="win">98.6% +19.8pp</span></div>
        <div class="sc-metric"><span>Requests</span><span>500</span></div>
      </div>
      <div class="scenario-card">
        <div class="sc-emoji">📟</div>
        <h4>GPRS (500ms RTT, 6.25KB/s, 2% loss)</h4>
        <div class="sc-metric"><span>vanilla</span><span class="lose">53.3%</span></div>
        <div class="sc-metric"><span>catcher + retry</span><span class="win">76.7% +23.4pp</span></div>
        <div class="sc-metric"><span>Iterations</span><span>30</span></div>
      </div>
      <div class="scenario-card">
        <div class="sc-emoji">🌪️</div>
        <h4>Burst Packet Loss Storm</h4>
        <div class="sc-metric"><span>vanilla</span><span class="lose">93.0%</span></div>
        <div class="sc-metric"><span>catcher + CB</span><span class="win">100.0% +7.0pp</span></div>
        <div class="sc-metric"><span>Requests</span><span>100</span></div>
      </div>
      <div class="scenario-card">
        <div class="sc-emoji">🕳️</div>
        <h4>Route Black Hole (30s)</h4>
        <div class="sc-metric"><span>During blackhole</span><span class="lose">0/5</span></div>
        <div class="sc-metric"><span>After recovery</span><span class="win">5/5 ✓</span></div>
        <div class="sc-metric"><span>CB cycles</span><span>5× correct</span></div>
      </div>
      <div class="scenario-card">
        <div class="sc-emoji">🏊</div>
        <h4>Connection Pool Exhaustion</h4>
        <div class="sc-metric"><span>Concurrent requests</span><span>100</span></div>
        <div class="sc-metric"><span>Pool size</span><span>10 sockets</span></div>
        <div class="sc-metric"><span>Success</span><span class="win">100/100 in 423ms</span></div>
      </div>
      <div class="scenario-card">
        <div class="sc-emoji">🌐</div>
        <h4>DNS Cache (StaleAwareDnsResolver)</h4>
        <div class="sc-metric"><span>Cold lookup</span><span>203ms</span></div>
        <div class="sc-metric"><span>Cached lookup</span><span class="win">0.3ms (676× speedup)</span></div>
        <div class="sc-metric"><span>Stale-while-revalidate</span><span class="win">working ✓</span></div>
      </div>
      <div class="scenario-card">
        <div class="sc-emoji">📦</div>
        <h4>Built-in Msgpack Codec</h4>
        <div class="sc-metric"><span>300B wire savings</span><span class="win">−10%</span></div>
        <div class="sc-metric"><span>20KB wire savings</span><span class="win">−7%</span></div>
        <div class="sc-metric"><span>NAPI boundary</span><span class="win">zero overhead</span></div>
      </div>
    </div>
  </div>
</section>

<!-- ═══ Resilience Layers ═══ -->
<section class="section">
  <div class="container">
    <h2>How It Works</h2>
    <p class="desc">Every request passes through four resilience layers before hitting the wire</p>
    <div class="layers">
      <div class="layer layer-app">Your App — client.get('/users')</div>
      <div class="layer layer-queue">Priority Queue — caps concurrency, schedules by priority</div>
      <div class="layer layer-cb">Circuit Breaker — trips on consecutive failures, auto-recovers</div>
      <div class="layer layer-retry">Retry — exponential backoff with jitter, evicts stale connections</div>
      <div class="layer layer-axios">HTTP Engine — axios (TS) / reqwest (Rust) / fetch (browser)</div>
    </div>
  </div>
</section>

<!-- ═══ Quick Start ═══ -->
<section class="section" id="quickstart">
  <div class="container">
    <h2>Quick Start</h2>
    <p class="desc">Replace axios.create() with one line</p>

    <div class="code-block">
      <pre><span class="cm">// Install</span>
<span class="kw">npm</span> install @eric8810/catcher-http @eric8810/catcher-ws</pre>
    </div>

    <div class="code-block">
      <pre><span class="cm">// HTTP — with retry, circuit breaker &amp; connection pooling</span>
<span class="kw">import</span> { createHttpClient } <span class="kw">from</span> <span class="str">'@eric8810/catcher-http'</span>

<span class="kw">const</span> client = <span class="fn">createHttpClient</span>({
  baseURL: <span class="str">'https://api.example.com'</span>,
  keepAlive: <span class="kw">true</span>,
  retry: { attempts: <span class="str">3</span> },
  circuitBreaker: { failureThreshold: <span class="str">5</span>, resetTimeout: <span class="str">30_000</span> },
  concurrency: <span class="str">10</span>,
})

<span class="kw">const</span> data = <span class="kw">await</span> client.<span class="fn">get</span>(<span class="str">'/users/1'</span>)
<span class="kw">const</span> result = <span class="kw">await</span> client.<span class="fn">post</span>(<span class="str">'/messages'</span>, { text: <span class="str">'hello'</span> })

<span class="cm">// Per-request overrides</span>
<span class="kw">await</span> client.<span class="fn">get</span>(<span class="str">'/analytics'</span>, { retry: <span class="kw">false</span>, timeout: <span class="str">5000</span> })

<span class="cm">// Dynamic interceptors</span>
client.interceptors.request.<span class="fn">use</span>(config => {
  config.headers.Authorization = <span class="str">'Bearer ...'</span>
  <span class="kw">return</span> config
})</pre>
    </div>

    <div class="code-block">
      <pre><span class="cm">// WebSocket — compression + reconnect + multi-endpoint racing</span>
<span class="kw">import</span> { createResilientWS } <span class="kw">from</span> <span class="str">'@eric8810/catcher-ws'</span>

<span class="kw">const</span> ws = <span class="fn">createResilientWS</span>({
  url: [<span class="str">'wss://cn.example.com'</span>, <span class="str">'wss://sg.example.com'</span>],
  perMessageDeflate: <span class="kw">true</span>,
  reconnect: { initialDelay: <span class="str">1000</span>, maxDelay: <span class="str">30_000</span> },
})

ws.<span class="fn">addEventListener</span>(<span class="str">'message'</span>, e => console.<span class="fn">log</span>(e.data))

<span class="cm">// Binary codec — 2-4× faster than JSON</span>
<span class="kw">import</span> { pack, unpack } <span class="kw">from</span> <span class="str">'@eric8810/catcher-ws'</span>
ws.<span class="fn">send</span>(<span class="fn">pack</span>({ event: <span class="str">'msg'</span>, data }))</pre>
    </div>

    <div class="code-block">
      <pre><span class="cm">// SSE — AI streaming (OpenAI / Anthropic / Gemini compatible)</span>
<span class="kw">import</span> { createSSEStream } <span class="kw">from</span> <span class="str">'@eric8810/catcher-http'</span>

<span class="kw">const</span> stream = <span class="fn">createSSEStream</span>({
  url: <span class="str">'https://api.openai.com/v1/chat/completions'</span>,
  method: <span class="str">'POST'</span>,
  headers: { Authorization: <span class="str">'Bearer ...'</span> },
  body: { model: <span class="str">'gpt-4'</span>, messages: [{ role: <span class="str">'user'</span>, content: <span class="str">'Hello'</span> }], stream: <span class="kw">true</span> },
})

<span class="kw">for await</span> (<span class="kw">const</span> line <span class="kw">of</span> stream) {
  <span class="kw">if</span> (!line.<span class="fn">startsWith</span>(<span class="str">'data:'</span>)) <span class="kw">continue</span>
  <span class="kw">const</span> payload = line.<span class="fn">slice</span>(<span class="str">6</span>)
  <span class="kw">if</span> (payload === <span class="str">'[DONE]'</span>) <span class="kw">break</span>
  process.stdout.<span class="fn">write</span>(JSON.<span class="fn">parse</span>(payload).choices[<span class="str">0</span>]?.delta?.content ?? <span class="str">''</span>)
}
<span class="cm">// loop ends = connection closed, no manual cleanup</span></pre>
    </div>
  </div>
</section>

<!-- ═══ Features ═══ -->
<section class="section">
  <div class="container">
    <h2>Features</h2>
    <div class="features-grid">
      <div class="feature-card">
        <div class="icon">🔄</div>
        <h4>Auto-Retry</h4>
        <p>Exponential backoff with ±25% jitter. Destroys stale keepAlive sockets before retry — never reuse a dead connection.</p>
      </div>
      <div class="feature-card">
        <div class="icon">⚡</div>
        <h4>Circuit Breaker</h4>
        <p>Trips on consecutive failures, auto-recovers after reset timeout. Prevents cascading failure storms in burst loss conditions.</p>
      </div>
      <div class="feature-card">
        <div class="icon">🔗</div>
        <h4>Connection Pooling</h4>
        <p>Shared HTTPS Agent with keepAlive, DNS caching, idle socket eviction. One agent → 3× throughput.</p>
      </div>
      <div class="feature-card">
        <div class="icon">📶</div>
        <h4>Resilient WebSocket</h4>
        <p>perMessageDeflate compression, exponential backoff reconnect, multi-endpoint racing. Survives network interruptions.</p>
      </div>
      <div class="feature-card">
        <div class="icon">🗜️</div>
        <h4>Binary Codec</h4>
        <p>Built-in <code>msgpack: true</code> config — 2-4× faster than JSON, 47% smaller payloads. Zero NAPI boundary overhead; also exposes standalone pack/unpack.</p>
      </div>
      <div class="feature-card">
        <div class="icon">🎯</div>
        <h4>Priority Queue</h4>
        <p>POST before prefetch. Your chat messages go out before avatar images. Concurrency-aware scheduling.</p>
      </div>
      <div class="feature-card">
        <div class="icon">✂️</div>
        <h4>Dynamic Interceptors</h4>
        <p>use() / eject() / clear() at runtime. LIFO request chain, FIFO response chain. Per-request overrides for retry, timeout, signal.</p>
      </div>
      <div class="feature-card">
        <div class="icon">🛡️</div>
        <h4>Route Black Hole Detection</h4>
        <p>Silently dropped packets? CB trips, connections evicted, automatic recovery when network returns.</p>
      </div>
      <div class="feature-card">
        <div class="icon">📡</div>
        <h4>Server-Sent Events (SSE)</h4>
        <p>AI streaming made simple. createSSEStream for one-shot chat, createSSEClient for long-lived push with auto-reconnect, Last-Event-ID resume, and circuit breaker protection.</p>
      </div>
      <div class="feature-card">
        <div class="icon">🌐</div>
        <h4>DNS Cache</h4>
        <p>StaleAwareDnsResolver — 676× cache-hit speedup, stale-while-revalidate serves cached entries while refreshing in the background, stale-on-error fallback for resilience.</p>
      </div>
    </div>
  </div>
</section>

<!-- ═══ Packages ═══ -->
<section class="section">
  <div class="container">
    <h2>Packages</h2>
    <p class="desc">Install only what you need — Node.js, Browser, Rust, Flutter, native mobile</p>
    <div class="code-block" style="max-width:600px;margin:0 auto">
      <pre><span class="cm"># Node.js native (Rust via napi-rs)</span>
<span class="kw">npm</span> i @eric8810/catcher-napi-http @eric8810/catcher-napi-ws

<span class="cm"># Node.js / Browser (pure TypeScript)</span>
<span class="kw">npm</span> i @eric8810/catcher-http @eric8810/catcher-ws @eric8810/catcher-web

<span class="cm"># Rust</span>
cargo add catcher-http catcher-ws

<span class="cm"># Flutter</span>
flutter pub add catcher_core</pre>
    </div>
  </div>
</section>

<!-- ═══ Footer ═══ -->
<footer class="footer">
  <div class="container">
    <p>Catcher 🪤 · MIT License · Benchmarks run on Node.js v24 · macOS aarch64</p>
  </div>
</footer>

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