Update index.html
Browse files- index.html +36 -61
index.html
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<!DOCTYPE html>
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<html lang="ja">
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<head>
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<meta charset="utf-8">
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<title>Blob + iframe で Service Worker</title>
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<style>pre{background:#f0f0f0;padding:4px;margin:4px 0;}</style>
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</head>
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<body>
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<h1>通信ログ</h1>
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<div id="log"></div>
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self.addEventListener('fetch', event => {
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const { request } = event;
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event.respondWith(
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fetch(request).then(res => {
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res.clone().text().then(body => {
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self.clients.matchAll().then(clients =>
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clients.forEach(c =>
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c.postMessage({ type:'log', url:request.url, status:res.status, snippet:body.slice(0,100) })
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)
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);
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});
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return res;
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}).catch(err => {
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self.clients.matchAll().then(clients =>
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clients.forEach(c =>
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c.postMessage({ type:'error', url:request.url, error:err.toString() })
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)
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);
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throw err;
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})
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);
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});
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</script>
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<!-- ②–⑤ メインスクリプト -->
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<script>
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const swSource = document.getElementById('sw-code').textContent;
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const swBlobUrl = URL.createObjectURL(new Blob([swSource], { type:'application/javascript' }));
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const iframeHtml = `
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<!DOCTYPE html>
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<html><head><meta charset="utf-8"></head><body>
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<script>
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</body></html>`;
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const iframeUrl = URL.createObjectURL(new Blob([iframeHtml], { type:'text/html' }));
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const iframe = document.createElement('iframe');
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iframe.style.display = 'none';
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iframe.src = iframeUrl;
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document.body.appendChild(iframe);
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});
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// テスト fetch
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fetch('https://jsonplaceholder.typicode.com/todos/1');
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fetch('https://httpstat.us/500');
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</script>
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</body>
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</html>
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<!DOCTYPE html>
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<html lang="ja">
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<head><meta charset="UTF-8"><title>iframe通信監視</title></head>
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<body>
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<h1>親ページ</h1>
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<div id="log"></div>
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<script>
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const iframe = document.createElement('iframe');
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iframe.style.display = 'none';
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document.body.appendChild(iframe);
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// iframe内部コード（Blobにする）
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const iframeCode = `
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window.addEventListener('message', e => {
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if(e.data === 'start') {
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fetch('https://jsonplaceholder.typicode.com/posts/1')
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.then(res => res.text())
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.then(text => {
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parent.postMessage({ type: 'fetch-success', url: 'https://jsonplaceholder.typicode.com/posts/1', body: text.slice(0, 100) }, '*');
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})
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.catch(err => {
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parent.postMessage({ type: 'fetch-error', error: err.toString() }, '*');
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});
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}
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});
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`;
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const blob = new Blob([iframeCode], { type: 'application/javascript' });
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iframe.src = URL.createObjectURL(blob);
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window.addEventListener('message', e => {
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const log = document.getElementById('log');
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if(e.data.type === 'fetch-success') {
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log.innerHTML += `<div style="color:green">成功: ${e.data.url}<pre>${e.data.body}</pre></div>`;
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} else if(e.data.type === 'fetch-error') {
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log.innerHTML += `<div style="color:red">エラー: ${e.data.error}</div>`;
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}
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});
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// iframeが読み込み終わったら開始指示
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iframe.onload = () => iframe.contentWindow.postMessage('start', '*');
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</script>
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</body>
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</html>
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