{"id":4568,"date":"2023-09-12T15:37:09","date_gmt":"2023-09-12T06:37:09","guid":{"rendered":"http:\/\/attacktube.com\/?p=4568"},"modified":"2023-09-12T18:13:26","modified_gmt":"2023-09-12T09:13:26","slug":"%e3%80%90javascript%e3%80%91uint8array%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%a8file%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%80%90%e4%b8%ad%e7%b4%9a%e8%80%85","status":"publish","type":"post","link":"https:\/\/attacktube.com\/?p=4568","title":{"rendered":"\u3010JavaScript\u3011Uint8Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3010\u4e2d\u7d1a\u8005\u3011"},"content":{"rendered":"\n<p>Uint8Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<br>\n<script async=\"\" src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3461056110605997\" crossorigin=\"anonymous\"><\/script>\n<ins class=\"adsbygoogle\" style=\"display:block; text-align:center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-3461056110605997\" data-ad-slot=\"3137443461\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n<br>\n\n\n\n<p>Uint8Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u30c6\u30ad\u30b9\u30c8\u304b\u3089Blob\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3057\u3001Blob\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u3002<\/p>\n\n\n\n<pre><code>\n&lt;!DOCTYPE html&gt;\n&lt;html lang=&quot;ja&quot;&gt;\n\n&lt;head&gt;\n\n  &lt;meta charset=&quot;utf-8&quot;&gt;\n  &lt;title&gt;sample&lt;\/title&gt;\n\n  &lt;style&gt;\n  &lt;\/style&gt;\n\n&lt;\/head&gt;\n\n&lt;body&gt;\n\n  DownloadLink\u3092\u751f\u6210\u3059\u308b\u3002\u30c6\u30ad\u30b9\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3002&lt;br&gt;\n  &lt;br&gt;\n  &lt;br&gt;\n\n  &lt;button id=&quot;button&quot;&gt;DownloadLink\u3092\u751f\u6210\u3059\u308b&lt;\/button&gt;\n\n  &lt;br&gt;\n  &lt;br&gt;\n  &lt;div&gt;\n    &lt;a id=&quot;download&quot;&gt;&lt;\/a&gt;\n  &lt;\/div&gt;\n\n\n  &lt;script&gt;\n\n    const test = (function() {\n\n      const Button = document.getElementById(&#039;button&#039;);\n      const Download = document.getElementById(&#039;download&#039;);\n\n      const createDownloadLink = async function() {\n\n        if (Download.href) {\n          URL.revokeObjectURL(Download.href);\n          console.warn(&#039;URL.revokeObjectURL(Download.href)\u3092\u5b9f\u884c\u3057\u305f\u3002&#039;);\n        } else {\n          console.log(&#039;else Download.href = &#039;, Download.href);\n        }\n\n        \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf[65, 66, 67]\u306f\u6587\u5b57\u5217ABC\u306b\u76f8\u5f53\u3059\u308b\u3002\n        const binaryData1 = new Uint8Array([65, 66, 67]); \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\n\n        \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf[68, 69, 70]\u306f\u6587\u5b57\u5217DEF\u306b\u76f8\u5f53\u3059\u308b\u3002\n        const binaryData2 = new Uint8Array([68, 69, 70]); \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\n\n        const textData = &quot;Hello, World!\\n&quot;; \/\/ \u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\n\n        \/\/ Blob\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\n        const blob = new Blob([binaryData1, binaryData2, textData]);\n\n        console.log(blob); \/\/ Blob { size: 19, type: &quot;&quot; }\n\n        \/\/ Blob\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\n        \/\/ \u7b2c2\u5f15\u6570\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u540d\u524d\u3092\u6307\u5b9a\u3059\u308b\u3002\n        const file = new File([blob], &#039;hello.txt&#039;);\n\n        console.log(file); \/\/ File { name: &quot;hello.txt&quot;, lastModified: 1694486744724, webkitRelativePath: &quot;&quot;, size: 19, type: &quot;&quot; }\n\n        \/\/ lastModified\u306f\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u305f\u6642\u9593\u3067\u3042\u308b\u3002\n        const date = new Date(file.lastModified);\n\n        const str = date.getFullYear() +\n          &#039;\/&#039; + (&#039;0&#039; + (date.getMonth() + 1)).slice(-2) +\n          &#039;\/&#039; + (&#039;0&#039; + date.getDate()).slice(-2) +\n          &#039; &#039; + (&#039;0&#039; + date.getHours()).slice(-2) +\n          &#039;:&#039; + (&#039;0&#039; + date.getMinutes()).slice(-2) +\n          &#039;:&#039; + (&#039;0&#039; + date.getSeconds()).slice(-2);\n\n        \/\/ \u30d5\u30a1\u30a4\u30eb\u306e\u6700\u7d42\u66f4\u65b0\u65e5\u6642\n        console.log(str); \/\/ 2023\/09\/11 14:11:33\n\n        Download.href = URL.createObjectURL(file);\n        Download.download = file.name;\n        Download.textContent = `Click to download &#039;${file.name}&#039; (${file.size} bytes)`;\n\n        console.log(&#039;Download.href = &#039;, Download.href);\n\n      };\n\n      \/\/ \u5b9f\u884c\u3059\u308b\u3002\n      Button.addEventListener(&#039;click&#039;, () =&gt; createDownloadLink());\n\n    })();\n  &lt;\/script&gt;\n\n&lt;\/body&gt;\n\n&lt;\/html&gt;\n<\/code><\/pre>\n\n\n\n<p>Uint8Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u30c6\u30ad\u30b9\u30c8\u304b\u3089File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u3002<\/p>\n\n\n\n<p>Blob\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7b2c1\u5f15\u6570\u306b\u306f\u3001Uint8Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u30c6\u30ad\u30b9\u30c8\u306a\u3069\u3001\u30d0\u30a4\u30ca\u30ea\u307e\u305f\u306f\u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002Blob\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u305d\u308c\u3089\u306e\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u6271\u3046\u3002<\/p>\n\n\n\n<pre><code>\n&lt;!DOCTYPE html&gt;\n&lt;html lang=&quot;ja&quot;&gt;\n\n&lt;head&gt;\n\n  &lt;meta charset=&quot;utf-8&quot;&gt;\n  &lt;title&gt;sample&lt;\/title&gt;\n\n  &lt;style&gt;\n  &lt;\/style&gt;\n\n&lt;\/head&gt;\n\n&lt;body&gt;\n\n  DownloadLink\u3092\u751f\u6210\u3059\u308b\u3002\u30c6\u30ad\u30b9\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3002&lt;br&gt;\n  &lt;br&gt;\n  &lt;br&gt;\n\n  &lt;button id=&quot;button&quot;&gt;DownloadLink\u3092\u751f\u6210\u3059\u308b&lt;\/button&gt;\n\n  &lt;br&gt;\n  &lt;br&gt;\n  &lt;div&gt;\n    &lt;a id=&quot;download&quot;&gt;&lt;\/a&gt;\n  &lt;\/div&gt;\n\n\n  &lt;script&gt;\n\n    const test = (function() {\n\n      const Button = document.getElementById(&#039;button&#039;);\n      const Download = document.getElementById(&#039;download&#039;);\n\n      const createDownloadLink = async function() {\n\n        if (Download.href) {\n          URL.revokeObjectURL(Download.href);\n          console.warn(&#039;URL.revokeObjectURL(Download.href)\u3092\u5b9f\u884c\u3057\u305f\u3002&#039;);\n        } else {\n          console.log(&#039;else Download.href = &#039;, Download.href);\n        }\n\n        \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf[65, 66, 67]\u306f\u6587\u5b57\u5217ABC\u306b\u76f8\u5f53\u3059\u308b\u3002\n        const binaryData1 = new Uint8Array([65, 66, 67]); \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\n\n        \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf[68, 69, 70]\u306f\u6587\u5b57\u5217GHI\u306b\u76f8\u5f53\u3059\u308b\u3002\n        const binaryData2 = new Uint8Array([71, 72, 73]); \/\/ \u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\n\n        const textData = &quot;Hello, World!\\n&quot;; \/\/ \u30c6\u30ad\u30b9\u30c8\u30c7\u30fc\u30bf\n\n        \/\/ \u7b2c2\u5f15\u6570\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u540d\u524d\u3092\u6307\u5b9a\u3059\u308b\u3002\n        const file = new File([binaryData1, binaryData2, textData], &#039;hello.txt&#039;);\n\n        console.log(file); \/\/ File { name: &quot;hello.txt&quot;, lastModified: 1694486744724, webkitRelativePath: &quot;&quot;, size: 19, type: &quot;&quot; }\n\n        \/\/ lastModified\u306f\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u305f\u6642\u9593\u3067\u3042\u308b\u3002\n        const date = new Date(file.lastModified);\n\n        const str = date.getFullYear() +\n          &#039;\/&#039; + (&#039;0&#039; + (date.getMonth() + 1)).slice(-2) +\n          &#039;\/&#039; + (&#039;0&#039; + date.getDate()).slice(-2) +\n          &#039; &#039; + (&#039;0&#039; + date.getHours()).slice(-2) +\n          &#039;:&#039; + (&#039;0&#039; + date.getMinutes()).slice(-2) +\n          &#039;:&#039; + (&#039;0&#039; + date.getSeconds()).slice(-2);\n\n        \/\/ \u30d5\u30a1\u30a4\u30eb\u306e\u6700\u7d42\u66f4\u65b0\u65e5\u6642\n        console.log(str); \/\/ 2023\/09\/11 14:11:33\n\n        Download.href = URL.createObjectURL(file);\n        Download.download = file.name;\n        Download.textContent = `Click to download &#039;${file.name}&#039; (${file.size} bytes)`;\n\n        console.log(&#039;Download.href = &#039;, Download.href);\n\n      };\n\n      \/\/ \u5b9f\u884c\u3059\u308b\u3002\n      Button.addEventListener(&#039;click&#039;, () =&gt; createDownloadLink());\n\n    })();\n  &lt;\/script&gt;\n\n&lt;\/body&gt;\n\n&lt;\/html&gt;\n<\/code><\/pre>\n\n\n\n<script type=\"text\/javascript\">\njQuery(function($){\n$(\".jp-video\").hide();\n});\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Uint8Array\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-4568","post","type-post","status-publish","format-standard","hentry","category-javascript"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/4568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4568"}],"version-history":[{"count":4,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/4568\/revisions"}],"predecessor-version":[{"id":4579,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/4568\/revisions\/4579"}],"wp:attachment":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4568"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}