{"id":267,"date":"2016-02-13T01:33:06","date_gmt":"2016-02-12T16:33:06","guid":{"rendered":"https:\/\/blog.srytk.com\/aquei\/?p=267"},"modified":"2016-02-13T01:33:06","modified_gmt":"2016-02-12T16:33:06","slug":"fetch-api%e3%81%a7utf8%e4%bb%a5%e5%a4%96%e3%81%ae%e3%82%a8%e3%83%b3%e3%82%b3%e3%83%bc%e3%83%87%e3%82%a3%e3%83%b3%e3%82%b0%e3%81%a0%e3%81%a8%e8%be%9b%e3%81%84","status":"publish","type":"post","link":"https:\/\/blog.srytk.com\/aquei\/267.html","title":{"rendered":"fetch API\u3067UTF8\u4ee5\u5916\u306e\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3060\u3068\u8f9b\u3044"},"content":{"rendered":"<p>XMLHttpRequest\u3088\u308a\u30d1\u30ef\u30d5\u30eb\u3067\u30d5\u30ec\u30ad\u30b7\u30d6\u30eb\u3068\u5642\u306e<a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/API\/Fetch_API\">fetch API<\/a>\u3060\u304c\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u306b\u95a2\u3057\u3066\u8a70\u307e\u3063\u305f\u3002Shift_JIS\u3067\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3055\u308c\u305f\u30c6\u30ad\u30b9\u30c8\u3092fetch\u3057\u3066\u6587\u5b57\u5217\u3092\u53d6\u308a\u51fa\u305d\u3046\u3068\u3057\u305f\u3089\u3001\u65e5\u672c\u8a9e\u3067\u66f8\u304b\u308c\u305f\u90e8\u5206\u304c\u6587\u5b57\u5316\u3051\u3057\u3084\u304c\u308b\u3002UTF8\u306a\u30d5\u30a1\u30a4\u30eb\u306a\u3089\u554f\u984c\u306a\u3044\u306e\u306b\u3002\u3064\u3089\u3044\u3002<\/p>\n<figure style=\"width: 960px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"\/\/www.srytk.com\/a\/image-proxy\/img\/mid\/300\/image?https%3A%2F%2Fc2.staticflickr.com%2F4%2F3173%2F2560364743_694d76fd4d_o.jpg\" sizes=\"auto, (min-width: 1014px) 800px, (min-width: 768px) calc(100vw - 150px - 4em), (min-width: 480) calc(100vw - 4em), calc(100vw - 2em)\" srcset=\"\/\/www.srytk.com\/a\/image-proxy\/img\/mid\/960\/image?https%3A%2F%2Fc2.staticflickr.com%2F4%2F3173%2F2560364743_694d76fd4d_o.jpg 960w ,\/\/www.srytk.com\/a\/image-proxy\/img\/mid\/660\/image?https%3A%2F%2Fc2.staticflickr.com%2F4%2F3173%2F2560364743_694d76fd4d_o.jpg 660w ,\/\/www.srytk.com\/a\/image-proxy\/img\/mid\/360\/image?https%3A%2F%2Fc2.staticflickr.com%2F4%2F3173%2F2560364743_694d76fd4d_o.jpg 360w ,\/\/www.srytk.com\/a\/image-proxy\/img\/mid\/300\/image?https%3A%2F%2Fc2.staticflickr.com%2F4%2F3173%2F2560364743_694d76fd4d_o.jpg 300w\" alt=\"\" width=\"960\" height=\"1280\" \/><figcaption class=\"wp-caption-text\">\u00a9 <a href=\"https:\/\/www.flickr.com\/photos\/greensurvey\/2560364743\/\" rel=\"cc:attributionURL\">frontriver<\/a> &#8211; &#8220;Fight Mojibake!!!&#8221; &#8211; <a href=\"http:\/\/creativecommons.org\/licenses\/by\/2.0\/deed.en\" rel=\"license\">Creative Commons: Attribution<\/a><\/figcaption><\/figure>\n<p>\u89e3\u6c7a\u7b56\u304c\u308f\u304b\u3093\u306a\u304f\u3066\u3001\u7d50\u5c40xhr\u306b\u623b\u308b\u3053\u3068\u306b\u3057\u305f\u3002xhr\u306f\u30d6\u30e9\u30a6\u30b6\u304c\u3088\u3057\u306a\u306b\u30c6\u30ad\u30b9\u30c8\u3092\u6271\u3046\u306e\u3067\u3001\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306a\u3069\u3068\u3044\u3046\u7d30\u304b\u3044\u3053\u3068\u6c17\u306b\u3057\u306a\u304f\u3066\u3059\u3080\u3002<\/p>\n<p><!--more--><\/p>\n<h2>Body.text()\u3064\u3089\u3044<\/h2>\n<pre><code>const text = 'data:text\/plain;charset=Shift_JIS;base64,grGC6oLNU2hpZnRfSklTgsWDR4OTg1KBW4NogrOC6oK9g2WDTINYg2eCxYK3';\r\n\r\nfetch(text)\r\n.then(res =&gt; res.text())\r\n.then(txt =&gt; console.log('fetch',txt));\r\n\/\/fetch \ufffd\ufffd\ufffd\ufffd\ufffdShift_JIS\ufffd\u0143G\ufffd\ufffd\ufffdR\ufffd[\ufffdh\ufffd\ufffd\ufffd\ua0bd\ufffde\ufffdL\ufffdX\ufffdg\ufffd\u0142\ufffd\r\n\r\nnew Promise(resolve =&gt; {\r\n  const xhr = new XMLHttpRequest();\r\n  \r\n  xhr.open('GET', text, true);\r\n  xhr.onload = () =&gt; resolve(xhr.response);\r\n  xhr.send();\r\n}).then(txt =&gt; console.log(\"xhr\", txt));\r\n\/\/xhr \u3053\u308c\u306fShift_JIS\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30c6\u30ad\u30b9\u30c8\u3067\u3059 <\/code><\/pre>\n<p>\u4e0a\u8a18\u306ffetch\u3068XMLHttpRequest\u306e\u4e21\u65b9\u3067DATA URI\u304b\u3089\u30c6\u30ad\u30b9\u30c8\u3092console\u306b\u51fa\u529b\u3059\u308b\u3060\u3051\u306e\u3082\u306e\u3060\u304c\u3001fetch\u306e\u65b9\u306f\u898b\u4e8b\u306b\u6587\u5b57\u5316\u3051\u3059\u308b\u3002\uff08<a href=\"https:\/\/jsbin.com\/kukagu\/edit?js,console\">\u30c7\u30e2\u306f\u3053\u3061\u3089&lt;jsbin&gt;<\/a>)<\/p>\n<p>\u3053\u308c\u306f\u30c6\u30ad\u30b9\u30c8\u304cShift_JIS\u3067\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3067\u3001UTF8\u3067\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3055\u308c\u305f\u30c6\u30ad\u30b9\u30c8\u3060\u3068fetch\u3067\u3082\u65e5\u672c\u8a9e\u304c\u6271\u3048\u308b\u3088\u3046\u3060\u3002<\/p>\n<pre><code>const utf8text = 'data:text\/plain;base64,VVRGOOOBquaWh+Wtl+WIlw=='; \/\/UTF8\u306a\u6587\u5b57\u5217\r\n\r\nfetch(utf8text)\r\n.then(resp =&gt; resp.text())\r\n.then(txt =&gt; console.log(txt)); \/\/UTF8\u306a\u6587\u5b57\u5217<\/code><\/pre>\n<p>\u3055\u3066\u3001MDN\u306b\u3088\u308c\u3070Response\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u5b9f\u88c5\u3059\u308bBody\u306etext\u30e1\u30bd\u30c3\u30c9\u306f<a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/API\/Body\/text\">\u300cUSVString \u3067\u89e3\u6c7a\u3059\u308b promise\u300d\u3092\u8fd4\u3059<\/a>\u3068\u3042\u308b\u304c\u3001<a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/API\/USVString\">USVstring<\/a>\u3063\u3066\u306a\u3093\u3060\uff1f\u3082\u3063\u3068\u76f4\u89b3\u7684\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u30c6\u30ad\u30b9\u30c8\u3068\u3057\u3066\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u306a\u3044\u306e\u304b\uff1f\uff1f\uff1f<\/p>\n<p>UTF8\u3057\u304b\u5b58\u5728\u3057\u306a\u3044\u30e6\u30fc\u30c8\u30d4\u30a2\u306a\u4e16\u754c\u306e\u5916\u3067\u3082\u6271\u3046\u306b\u306f\u3069\u3046\u3057\u305f\u3089\u3044\u3044\u306e\u304b\u3002\u591a\u5206\u306a\u306b\u304b\u3057\u3089\u306e\u65b9\u6cd5\u306f\u3042\u308b\u3093\u3060\u308d\u3046\u3051\u3069\u3001MDN\u3092\u773a\u3081\u3066\u3082\u89e3\u6cd5\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u3002<a href=\"https:\/\/github.com\/polygonplanet\/encoding.js\/blob\/master\/README_ja.md\">\u6587\u5b57\u30b3\u30fc\u30c9\u3092\u5909\u63db\u3059\u308b<\/a>\u3068\u3044\u3046\u624b\u3082\u3042\u308b\u3051\u3069\u3001\u305d\u3053\u307e\u3067\u3059\u308b\u306a\u3089\u521d\u3081\u304b\u3089XHR\u3092\u4f7f\u3046\u307b\u3046\u304c\u3088\u3063\u307d\u3069\u5e78\u305b\u306a\u306e\u306f\u9593\u9055\u3044\u306a\u3044\u3002<\/p>\n<p>\u3082\u3057\u304b\u3057\u305f\u3089\u50d5\u306ffetch API\u3092\u8aa4\u89e3\u3057\u3066\u3044\u305f\u306e\u304b\u3082\u3057\u308c\u306a\u3044\u3002XMLHttpRequest\u3092\u4ee3\u66ff\u3059\u308b\u3082\u306e\u3067\u3001jQuery.ajax()\u7684\u306a\u4fbf\u5229\u3067\u304b\u3086\u3044\u3068\u3053\u308d\u306b\u624b\u304c\u5c4a\u304f\u30a2\u30ec\u3060\u3068\u601d\u3044\u8fbc\u3093\u3067\u3044\u305f\u3051\u3069\u3001\u51b7\u9759\u306b\u306a\u3063\u3066\u8003\u3048\u308b\u3068\u305d\u3053\u307e\u3067\u4fbf\u5229\u3067\u3082\u306a\u3044\u3088\u3046\u306a\u6c17\u304c\u3059\u308b\u3002\u305d\u3082\u305d\u3082<a href=\"https:\/\/developers.google.com\/web\/updates\/2015\/03\/introduction-to-fetch\">fetch\u3092\u30ad\u30e3\u30f3\u30bb\u30eb\u3059\u308b\u3053\u3068\u3059\u3089\u73fe\u5728\u3067\u306f\u51fa\u6765\u306a\u3044<\/a>\u3089\u3057\u3044\u3057\u3002fetch\u306fservice worker\u306e\u4e2d\u3067\u3057\u304b\u751f\u304d\u3066\u3044\u3051\u306a\u3044\u306e\u304b\u3082\u3057\u308c\u306a\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>XMLHttpRequest\u3088\u308a\u30d1\u30ef\u30d5\u30eb\u3067\u30d5\u30ec\u30ad\u30b7\u30d6\u30eb\u3068\u5642\u306efetch API\u3060\u304c\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u306b\u95a2\u3057\u3066\u8a70\u307e\u3063\u305f\u3002Shift_JIS\u3067\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3055\u308c\u305f\u30c6\u30ad\u30b9\u30c8\u3092fetch\u3057\u3066\u6587\u5b57\u5217\u3092\u53d6\u308a\u51fa\u305d\u3046\u3068\u3057\u305f\u3089\u3001\u65e5\u672c\u8a9e\u3067\u66f8\u304b\u308c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"activitypub_content_warning":"","activitypub_content_visibility":"local","activitypub_max_image_attachments":5,"footnotes":""},"categories":[2],"tags":[110,111],"class_list":["post-267","post","type-post","status-publish","format-standard","hentry","category-tech","tag-fetch","tag-xmlhttprequest"],"_links":{"self":[{"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/posts\/267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/comments?post=267"}],"version-history":[{"count":6,"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/posts\/267\/revisions"}],"predecessor-version":[{"id":273,"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/posts\/267\/revisions\/273"}],"wp:attachment":[{"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/media?parent=267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/categories?post=267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.srytk.com\/aquei\/wp-json\/wp\/v2\/tags?post=267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}