{"id":2806,"date":"2021-04-29T21:32:04","date_gmt":"2021-04-29T12:32:04","guid":{"rendered":"http:\/\/blog.xcir.net\/?p=2806"},"modified":"2021-09-07T16:21:07","modified_gmt":"2021-09-07T07:21:07","slug":"http%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5%e5%85%a5%e9%96%80%e3%81%ae%e5%85%a5%e9%96%80","status":"publish","type":"post","link":"http:\/\/blog.xcir.net\/?p=2806","title":{"rendered":"HTTP\u30ad\u30e3\u30c3\u30b7\u30e5\u5165\u9580\u306e\u5165\u9580"},"content":{"rendered":"\n<p><a rel=\"noreferrer noopener\" href=\"http:\/\/blog.xcir.net\/?p=2780\" data-type=\"post\" data-id=\"2780\" 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target=\"_blank\">Cache-Control<\/a>\u306a\u3069\u306e\u8a18\u4e8b\u304c\u8aad\u307f\u3084\u3059\u304f\u306a\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u306a\u3068\u3044\u3046\u306e\u3068(\u8a18\u4e8b\u8aad\u307f\u7d42\u308f\u3063\u305f\u3089MDN\u8aad\u3093\u3067\u307f\u3066\u307b\u3057\u3044)\u3001\u8208\u5473\u3092\u6301\u3063\u3066\u3082\u3089\u3048\u308c\u3070\u672c\u3092\u624b\u306b\u53d6\u3063\u3066\u3082\u3089\u3048\u308b\u304b\u306a\u3041\u3068\u3044\u3063\u305f\u611f\u3058\u3067\u3059(\u5272\u3068\u672c\u304b\u3089\u5185\u5bb9\u6301\u3063\u3066\u304d\u3066\u308b)\u3002<\/p>\n\n\n\n<p>\u306a\u304a\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3044\u3063\u3066\u3082\u69d8\u3005\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u8a18\u4e8b\u3067\u306fHTTP\u306b\u304a\u3051\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u540c\u69d8\u306bProxy\u306fReverseProxy\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 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class=\"wp-block-heading\">\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6027\u8cea\u3068\u7f6e\u304d\u5834\u6240<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6027\u8cea<\/h4>\n\n\n\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3044\u304f\u3064\u304b\u306e\u8ef8\u3067\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u305d\u306e\u4e00\u3064\u306b<strong>\u518d\u5229\u7528\u3092\u8ab0\u304c\u3059\u308b<\/strong>\u306e\u304b\u3068\u3044\u3046\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>\u7279\u5b9a<\/strong>\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u307f\u304c\u53c2\u7167\u53ef\u80fd\u306a\u30ad\u30e3\u30c3\u30b7\u30e5(<strong>private <\/strong>cache)<\/li><li><strong>\u8907\u6570<\/strong>\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u53c2\u7167\u53ef\u80fd\u306a\u30ad\u30e3\u30c3\u30b7\u30e5(<strong>shared <\/strong>cache)<\/li><\/ul>\n\n\n\n<p>\u3053\u306e2\u3064\u306e\u6027\u8cea\u306f\u304d\u3061\u3093\u3068\u533a\u5225\u3057\u3066\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u3054\u3063\u3061\u3083\u306b\u3059\u308b\u3068\u4e8b\u6545\u306e\u5143\u3068\u306a\u308a\u307e\u3059\u3002<br>(\u3061\u306a\u307f\u306bcache-control\u306epublic\/private\u3068\u306f\u5168\u304f\u5225\u7269\u3067\u3059\u3002\u305d\u308c\u3068\u3054\u3063\u3061\u3083\u306b\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046)<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070API\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3068\u3057\u307e\u3059\u3002<br>\u90fd\u9053\u5e9c\u770c\u306e\u30ea\u30b9\u30c8\u3092\u8fd4\u3059\u3088\u3046\u306aAPI\u3067\u3042\u308c\u3070shared\u3068\u3057\u3066\u554f\u984c\u306a\u3044\u3067\u3057\u3087\u3046\u3002<br>\u3068\u3053\u308d\u304c\u3001\u30ed\u30b0\u30a4\u30f3\u5f8c\u306e\u30e6\u30fc\u30b6\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u308b\u3082\u306e\u306f\u8907\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u5171\u6709\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u306e\u3067private\u3067\u3059\u3002<\/p>\n\n\n\n<p>shared\u306e\u3082\u306e\u3092private\u3068\u3057\u3066\u6271\u3046\u306e\u306f\u7bc4\u56f2\u304c\u72ed\u307e\u308b\u308f\u3051\u3067\u3059\u304b\u3089\u554f\u984c\u306a\u3044\u306e\u3067\u3059\u304c\u3001\u9006\u3092\u884c\u3046\u3068\u4e8b\u6545\u308b\u306e\u304c\u76ee\u306b\u898b\u3048\u308b\u3067\u3057\u3087\u3046\u3002<br>\u591a\u304f\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u4e8b\u6545\u306f\u3053\u3053\u3092\u610f\u56f3\u305b\u305a\u30fb\u9069\u5207\u306a\u30b1\u30a2\u3092\u305b\u305a\u306b\u8de8\u3044\u3067\u3057\u307e\u3063\u3066\u8d77\u304d\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001private\/shared\u3067\u3059\u304c\u3001\u53b3\u5bc6\u306b\u3053\u306e2\u7a2e\u306b\u53ce\u675f\u3059\u308b\u304b\u3068\u3044\u3046\u3068\u305d\u3046\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u82e5\u5e72\u5fdc\u7528\u7684\u306a\u8003\u3048\u65b9\u306b\u306a\u308b\u306e\u3067\u7c21\u5358\u306b\u3067\u3059\u304c\u3001\u4f8b\u3048\u3070\u30e6\u30fc\u30b6\u306e\u4f4f\u3093\u3067\u308b\u5730\u57df\uff08\u90fd\u9053\u5e9c\u770c\uff09\u3068\u3044\u3046\u5c5e\u6027\u306b\u3088\u3063\u3066API\u306e\u7d50\u679c\u304c\u5909\u308f\u308b\u5834\u5408\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<br>\u3053\u308c\u306f\u8907\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5411\u3051\u3067\u306f\u3042\u308b\u3082\u306e\u306e\u3001\u3059\u3079\u3066\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u5bfe\u8c61\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u304c\u8a00\u3048\u307e\u3059\u3002<br>\u7279\u5b9a\u306e\u5c5e\u6027\uff08\u8ffd\u52a0\u306e\u30ad\u30fc\uff09\u306e\u96c6\u5408\u4f53\uff08\u30af\u30e9\u30b9\u30bf\uff09\u5411\u3051\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3067private\u3068shared\u306e\u4e2d\u9593\u3068\u3044\u3048\u308b\u3067\u3057\u3087\u3046\u3002<br>\u3053\u308c\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u30ad\u30fc\u304c\u3068\u304b\u305d\u3046\u3044\u3046\u8a71\u306b\u306f\u306a\u308a\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u9ad8\u5ea6\u306b\u4f7f\u3046\u305f\u3081\u306e\u8a71\u306b\u306a\u308b\u306e\u3067\u3059\u304c\u3001\u3053\u308c\u306b\u3064\u3044\u3066\u306f<a rel=\"noreferrer noopener\" href=\"http:\/\/blog.xcir.net\/?p=2575\" target=\"_blank\" data-type=\"post\" data-id=\"2575\">CDN\u3068\u306e\u4ed8\u304d\u5408\u3044\u65b9<\/a>\u3084<a rel=\"noreferrer noopener\" href=\"https:\/\/amzn.to\/3t2Ez2W\" target=\"_blank\">\u672c<\/a>\u3092\u8aad\u3093\u3067\u307f\u3066\u304f\u3060\u3055\u3044\u3002<br>\u3042\u304f\u307e\u3067\u3001\u3053\u3053\u3067\u306fprivate\/shared\u3067\u5206\u304b\u308c\u3066\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u305d\u306e\u57a3\u6839\u3092\u610f\u56f3\u3057\u3066\u8de8\u3050\u3053\u3068\u3067\u9ad8\u5ea6\u306b\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u3044\u3063\u305f\u3053\u3068\u3092\u77e5\u3063\u3066\u304a\u3051\u3070\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u7f6e\u304d\u5834\u6240<\/h4>\n\n\n\n<p>\u5148\u307b\u3069\u30d6\u30e9\u30a6\u30b6\u3068CDN\u3092\u4f8b\u306b\u3042\u3052\u307e\u3057\u305f\u304c\u3001Web\u30b5\u30a4\u30c8\u3092\u898b\u308b\u4e0a\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3069\u3053\u306b\u3042\u308b\u306e\u3060\u308d\u3046\u304b\u3068\u3044\u3046\u3068\u3001\u30ed\u30fc\u30ab\u30eb\u30fb\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u30fb\u7d4c\u8def\u4e0a\u306e3\u304b\u6240\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/three_cdstyles_kari.png\"><img loading=\"lazy\" decoding=\"async\" width=\"4112\" height=\"1328\" src=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/three_cdstyles_kari.png\" alt=\"\" class=\"wp-image-2807\"\/><\/a><figcaption>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u7f6e\u304d\u5834\u6240\uff08\u30ed\u30fc\u30ab\u30eb[\u30d6\u30e9\u30a6\u30b6]\u30fb\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4[Proxy]\u30fb\u7d4c\u8def\u4e0a[CDN]\uff09<\/figcaption><\/figure>\n\n\n\n<p>\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u3068\u7d4c\u8def\u4e0a\u3068\u3044\u3046\u306e\u306f\u3042\u307e\u308a\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u306f\u805e\u304d\u306a\u308c\u306a\u3044\u3068\u306f\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u30aa\u30ea\u30b8\u30f3\u3068\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u3064\u306a\u3050\u90e8\u5206\u306b\u304a\u3044\u3066\u3042\u308bProxy\u3067\u884c\u3046\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u3001<br>\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u7d4c\u8def\u4e0a\u306b\u3042\u308bCDN\u306e\u30a8\u30c3\u30b8\u30b5\u30fc\u30d0\u30fc\u3067\u884c\u3046\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u306a\u304a\u3001\u3053\u308c\u3089\u306e\u533a\u5206\u3051\uff08\u30ed\u30fc\u30ab\u30eb\u30fb\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u30fb\u7d4c\u8def\u4e0a\uff09\u306f\u3042\u307e\u308a\u4e00\u822c\u7684\u3067\u306f\u306a\u304f\u3001\u5b9a\u7fa9\u3067\u3082\u63fa\u308c\u3066\u308b\u611f\u304c\u3042\u308b\u3093\u3067\u6574\u7406\u3057\u305f\u3082\u306e\u3067\u3059\u3002\uff08<a rel=\"noreferrer noopener\" href=\"https:\/\/twitter.com\/xcir\/status\/1361530081613504513\" target=\"_blank\">\u53c2\u7167<\/a>\uff09<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u3053\u308c\u3089\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3059\u3079\u3066\u306e\u30b5\u30a4\u30c8\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br>CDN\u3092\u672a\u5c0e\u5165\u306e\u30b5\u30a4\u30c8\u3082\u3042\u308a\u307e\u3059\u3057\u3001\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u3046\u307e\u304f\u4f7f\u3048\u3066\u3044\u306a\u3044\u30b5\u30a4\u30c8\u3082\u591a\u6570\u3042\u308a\u307e\u3059\u3002<br>\u3068\u308a\u3042\u3048\u305a\u30013\u304b\u6240\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u77e5\u3063\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u30ed\u30fc\u30ab\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\uff08\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5\uff09<\/h5>\n\n\n\n<p>\u30ed\u30fc\u30ab\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3044\u308f\u3086\u308b\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u975e\u5e38\u306b\u308f\u304b\u308a\u3084\u3059\u3044\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/2-12.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/2-12.png\" alt=\"\" class=\"wp-image-2810\" width=\"423\" height=\"284\"\/><\/a><\/figure>\n\n\n\n<p>\u305d\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ed\u30fc\u30ab\u30eb\u306b\u3042\u308b\u306e\u3067\u3001\u5f53\u7136\u4ed6\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u53c2\u7167\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<br>\u305d\u306e\u305f\u3081<strong>\u7279\u5b9a\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5411\u3051<\/strong>\u306eprivate cache\u3068<strong>\u8907\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5411\u3051<\/strong>\u306eshared cache\u306e\u3069\u3061\u3089\u3082\u683c\u7d0d\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<br>\u8907\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5411\u3051\u3060\u304b\u3089\u3068\u3044\u3063\u3066\u5fc5\u305a\u4ed6\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5171\u6709\u3057\u306a\u304f\u3066\u306f\u3044\u3051\u306a\u3044\u3068\u3044\u3046\u3082\u306e\u3067\u306f\u306a\u304f\u3001\u3042\u304f\u307e\u3067\u6027\u8cea\u3067\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u30ad\u30e3\u30c3\u30b7\u30e5\uff08Proxy\uff09\u30fb\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\uff08Proxy\/CDN\uff09<\/h5>\n\n\n\n<p>Proxy\u3068CDN\u3067\u3059\u304c\u3001\u3069\u3061\u3089\u3082\u8907\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/2-13.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/2-13.png\" alt=\"\" class=\"wp-image-2813\" width=\"407\" height=\"238\"\/><\/a><\/figure>\n\n\n\n<p>\u305d\u306e\u305f\u3081\u3001\u683c\u7d0d\u3067\u304d\u308b\u306e\u306fshared cache\u306e\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p>Proxy\u3082\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u7d4c\u8def\u4e0a\u306b\u3042\u308b\u308f\u3051\u306a\u306e\u3067\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u306f\u3068\u611f\u3058\u305f\u65b9\u306f\u92ed\u3044\u3067\u3059\u3002<br>\u305d\u306e\u3068\u304a\u308a\u3067<strong>Proxy\u3082\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong>\u3067\u306f\u3042\u308b\u306e\u3067\u3059\u304c\u3001CDN\u3068\u4e00\u7dd2\u306b\u3059\u308b\u306b\u306f\u6027\u8cea\u304c\u7570\u306a\u308b\u305f\u3081\u5206\u3051\u3066\u3044\u307e\u3059\u3002<br>\u3053\u3053\u3067\u306f\u8a73\u3057\u304f\u89e6\u308c\u307e\u305b\u3093\u304c\u3001\u3044\u3063\u305f\u3093\u306fProxy\u3068CDN\u306e\u9055\u3044\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u3001\u4e21\u8005\u3092\u4f75\u7528\u3059\u308b\u3053\u3068\u3067\u30e1\u30ea\u30c3\u30c8\u3082\u3042\u308b\u306e\u3067\u3059\u304c\u3001\u3044\u3063\u305f\u3093\u306fshared\u3092\u683c\u7d0d\u3059\u308b\u5834\u6240\u3068\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u307e\u3068\u3081\u308b\u3068\u3053\u3093\u306a\u611f\u3058\u3067\u3059<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/2-23-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"4928\" height=\"2613\" src=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/2-23-1.png\" alt=\"\" class=\"wp-image-2814\"\/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>\u7a2e\u985e<\/td><td>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u306e\u5bfe\u5fdc<\/td><td>\u683c\u7d0d\u3067\u304d\u308b\u5834\u6240<\/td><\/tr><tr><td>private<\/td><td>1:1<\/td><td>\u30ed\u30fc\u30ab\u30eb<\/td><\/tr><tr><td>shared<\/td><td>1:n<\/td><td>\u30ed\u30fc\u30ab\u30eb\u30fb\u7d4c\u8def\u4e0a\u30fb\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u30ed\u30fc\u30ab\u30eb\u30fb\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f75\u7528\u3057\u3088\u3046<\/h4>\n\n\n\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u518d\u5229\u7528\u3055\u308c\u308b\u307b\u3069\u3044\u3044\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30b5\u30a4\u30c8\u306e\u898f\u6a21\u306b\u3082\u3088\u308b\u306e\u3067\u3059\u304c\u3001\u30ed\u30fc\u30ab\u30eb\u3068\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u305d\u308c\u305e\u308c\u6027\u8cea\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5\u3060\u3051\u9069\u5207\u306b\u8a2d\u5b9a\u3057\u3066\u304a\u3051\u3070\u7d4c\u8def\u4e0a\u3067\u306f\u4e0d\u8981\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/4-16.png\"><img loading=\"lazy\" decoding=\"async\" width=\"4351\" height=\"3334\" src=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/4-16.png\" alt=\"\" class=\"wp-image-2815\"\/><\/a><\/figure>\n\n\n\n<p><br>\u30ed\u30fc\u30ab\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6301\u3064\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u81ea\u8eab\u304c\u30b5\u30a4\u30c8\u3092\u518d\u8a2a\u3059\u308b\u5834\u5408\u306f\u6709\u52b9\u3067\u3059\u304c\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u65b0\u898f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u306f\u7121\u52b9\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u65b0\u898f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5bfe\u3057\u3066\u3082\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u4f8b\u3048\u3070\u30b5\u30a4\u30c8\u3078\u306e\u6d41\u5165\u304c\u7a81\u7136\u5897\u3048\u308b\u3068\u3044\u3063\u305f\u4e8b\u614b\u3067\u3082\u5bfe\u51e6\u304c\u3057\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u306e\u305f\u3081\u30b3\u30f3\u30c6\u30f3\u30c4\u6b21\u7b2c\u3067\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u30d6\u30e9\u30a6\u30b6\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u3088\u3046\u306b\u7279\u5b9a\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u3057\u304b\u4f7f\u3048\u306a\u3044private cache\u306b\u3059\u308b\u3088\u308a\u3082\u3001 \u52b9\u7387\u3092\u8003\u3048\u3066\u30ed\u30fc\u30ab\u30eb\u30fb\u7d4c\u8def\u4e0a\u306e\u3069\u3061\u3089\u3067\u3082\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u3067\u304d\u3001\u591a\u6570\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u5171\u6709\u3067\u304d\u308bshared cache\u306b\u7a4d\u6975\u7684\u306b\u3059\u3079\u304d\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3053\u3053\u307e\u3067\u306e\u307e\u3068\u3081<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4e00\u53e3\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3044\u3063\u3066\u3082\u305d\u306e\u6027\u8cea\u3067private\u3068shared\u306e2\u7a2e\u985e\u304c\u3042\u308b<\/li><li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u683c\u7d0d\u3059\u308b\u5834\u6240\u3068\u3057\u3066\u30ed\u30fc\u30ab\u30eb\u3068\u7d4c\u8def\u4e0a\uff08\uff0b\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\uff09\u304c\u3042\u308b<ul><li>\u30ed\u30fc\u30ab\u30eb\u306b\u306fprivate\u3068shared\u304c\u683c\u7d0d\u3067\u304d\u308b<\/li><li>\u7d4c\u8def\u4e0a\u306b\u306fshared\u304c\u683c\u7d0d\u3067\u304d\u308b<\/li><\/ul><\/li><\/ul>\n\n\n\n<p>\u3068\u308a\u3042\u3048\u305a\u3053\u306e\u8fba\u308a\u3092\u6291\u3048\u305f\u3046\u3048\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5404\u8a18\u4e8b\u3092\u8aad\u3093\u3067\u307f\u308b\u3068\u3001CDN\uff08\u7d4c\u8def\u4e0a\uff09\u306e\u8a71\u3092\u3057\u3066\u3044\u308b\u306e\u304b\u3001\u30d6\u30e9\u30a6\u30b6\uff08\u30ed\u30fc\u30ab\u30eb\uff09\u306e\u8a71\u3092\u3057\u3066\u3044\u308b\u306e\u304b\u3068\u308f\u304b\u308a\u3084\u3059\u304f\u306a\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cache-Control\u3068\u306f\u306a\u306b\u3092\u884c\u3046\u3082\u306e\u304b<\/h2>\n\n\n\n<p>\u305d\u308d\u3063\u3068\u65b0\u3057\u3044RFC\u304c\u51fa\u305d\u3046\u3067\u3059\u304c\u3001\u73fe\u72b6\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4ed5\u69d8\u306f<a rel=\"noreferrer noopener\" href=\"https:\/\/triple-underscore.github.io\/RFC7234-ja.html\" target=\"_blank\">RFC7234<\/a>\u3067\u3001\u305d\u306e\u30bb\u30af\u30b7\u30e7\u30f32\u306b\u304a\u3044\u3066<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Although&nbsp;caching&nbsp;is&nbsp;an&nbsp;entirely&nbsp;OPTIONAL&nbsp;feature&nbsp;of&nbsp;HTTP,<br>it&nbsp;can&nbsp;be&nbsp;assumed&nbsp;that&nbsp;reusing&nbsp;a&nbsp;cached&nbsp;response&nbsp;is&nbsp;desirable&nbsp;<br>and&nbsp;that&nbsp;such&nbsp;reuse&nbsp;is&nbsp;the&nbsp;default&nbsp;behavior&nbsp;when&nbsp;no&nbsp;requirement<br>or&nbsp;local&nbsp;configuration&nbsp;prevents&nbsp;it.<\/p><p>\u30ad\u30e3\u30c3\u30b7\u30e5\u306fHTTP\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u6a5f\u80fd\u3067\u306f\u3042\u308b\u304c\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u518d\u5229\u7528\u306f\u671b\u307e\u3057\u3044\u3082\u306e\u3067\u3042\u308a\u3001\u305d\u308c\u3092\u9632\u6b62\u3059\u308b\u3088\u3046\u306a\u8981\u4ef6\u30fb\u8a2d\u5b9a\u304c\u306a\u3044\u5834\u5408\u306f\u300c\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u52d5\u4f5c\u300d\u3067\u3042\u308b\u3002<\/p><cite><a rel=\"noreferrer noopener\" href=\"https:\/\/tools.ietf.org\/html\/rfc7234#section-2\" target=\"_blank\">RFC7234#<\/a><a href=\"https:\/\/tools.ietf.org\/html\/rfc7234#section-2\" target=\"_blank\" rel=\"noreferrer noopener\">2<\/a><\/cite><\/blockquote>\n\n\n\n<p>\u3068\u89e6\u308c\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305a\u6700\u521d\u306b\u77e5\u3063\u3066\u304a\u304d\u305f\u3044\u306e\u306f\u6761\u4ef6\u3055\u3048\u305d\u308d\u3048\u3070Cache-Control\u3092\u6307\u5b9a\u3057\u306a\u304f\u3066\u3082\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<br>\u6761\u4ef6\u306f\u69d8\u3005\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u91cd\u8981\u306a\u6761\u4ef6\u306bTTL\u304c\u8a08\u7b97\u3067\u304d\u308b\u3068\u3044\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br>TTL\u306fCache-Control\u306emax-age\u3067\u6307\u5b9a\u3059\u308b\u3082\u306e\u3067\u306f\uff1f\u3068\u601d\u308f\u308c\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u306aTTL\u8a08\u7b97\uff08<a rel=\"noreferrer noopener\" href=\"https:\/\/tools.ietf.org\/html\/rfc7234#section-4.2.2\" target=\"_blank\">RFC7234#4.2.2<\/a>\uff09\u3068\u3044\u3046\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>Last-Modified\u3068\u3044\u3046\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u6700\u7d42\u66f4\u65b0\u65e5\u3068\u73fe\u5728\u6642\u523b\u3092\u8868\u3059Date\u30d8\u30c3\u30c0\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u306e2\u3064\u306e\u30d8\u30c3\u30c0\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u306aTTL\u306e\u8a08\u7b97\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3059\u3054\u3044\u4e71\u66b4\u306b\u8a00\u3048\u3070\u6700\u7d42\u66f4\u65b0\u65e5\u304b\u30891\u65e5\u7d4c\u904e\u3057\u3066\u308b\u3093\u3067\u307e\u30412\u6642\u9593\u3050\u3089\u3044(10%\u7a0b\u5ea6)\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u3082\u3044\u3044\u3067\u3057\u3087\u3068\u3044\u3063\u305f\u611f\u3058\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u306aTTL = (Date &#8211; Last-Modified) \/ 10<\/strong><\/p>\n\n\n\n<p>\u3064\u307e\u308a\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u304f\u306a\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u306fCache-Control\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3057\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u3059\u308b\u306b\u3057\u3066\u3082\u610f\u56f3\u3057\u305f\u52d5\u4f5c\u3092\u884c\u3046\u3088\u3046\u306b\u6b63\u3057\u304f\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u683c\u7d0d\u3059\u308b\u3001\u305d\u3057\u3066\u4f7f\u3046<\/h3>\n\n\n\n<p>\u30ed\u30fc\u30ab\u30eb\u30fb\u7d4c\u8def\u4e0a\u306e\u3069\u3061\u3089\u306e\u5834\u5408\u3067\u3082\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3044\u3046\u3082\u306e\u306f<strong>\u683c\u7d0d\u3059\u308b<\/strong>\u30fb<strong>\u4f7f\u3046<\/strong>\u3068\u3044\u30462\u3064\u306e\u30b9\u30c6\u30fc\u30b8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/c.png\"><img loading=\"lazy\" decoding=\"async\" width=\"376\" height=\"100\" src=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/c.png\" alt=\"\" class=\"wp-image-2818\"\/><\/a><\/figure>\n\n\n\n<p>\u4f8b\u3048\u3070TTL\u306e\u7bc4\u56f2\u5185\u304b\u3068\u3044\u3063\u305f\u8a08\u7b97\u306f\u5229\u7528\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u884c\u3046\u308f\u3051\u3067\u3059\u304b\u3089\u3001\u5f53\u305f\u308a\u524d\u3068\u3044\u3048\u3070\u5f53\u305f\u308a\u524d\u306a\u306e\u3067\u3059\u304c\u3001\u6848\u5916\u3053\u306e\u8fba\u308a\u306e\u610f\u8b58\u304c\u629c\u3051\u3066\u3044\u308b\u3068\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p>Cache-Control\u306b\u306f\u69d8\u3005\u306a\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u304c\u3069\u306e\u30b9\u30c6\u30fc\u30b8\u306b\u52b9\u304f\u306e\u304b\u3068\u3044\u3046\u306e\u3092\u8003\u3048\u308b\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u52d8\u9055\u3044\u3055\u308c\u3084\u3059\u3055\u3067\u6709\u540d\u306ano-cache\u3068no-store\u3067\u3059\u304c\u3001no-cache\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3092<strong>\u5229\u7528\u3059\u308b<\/strong>\u3068\u304d\u306e\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u3067no-store\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3092<strong>\u683c\u7d0d\u3059\u308b<\/strong>\u3068\u304d\u306e\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>no-cache\u306f\u5229\u7528\u3059\u308b\u3068\u304d\u306e\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u306a\u306e\u3067\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002\u3067\u3001\u5229\u7528\u6642\u306b\u518d\u691c\u8a3c\u3092\u884c\u3044\u6700\u65b0\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>no-store\u306f\u683c\u7d0d\u3059\u308b\u3068\u304d\u306e\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u306a\u306e\u3067\u3001\u305d\u3082\u305d\u3082\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u683c\u7d0d\u3055\u305b\u306a\u3044\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b9\u3060\u3051\u3067\u306f\u306a\u3044Cache-Control<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/c2.png\"><img loading=\"lazy\" decoding=\"async\" width=\"568\" height=\"723\" src=\"http:\/\/blog.xcir.net\/wp-content\/uploads\/2021\/04\/c2.png\" alt=\"\" class=\"wp-image-2819\"\/><\/a><\/figure>\n\n\n\n<p>\u3053\u308c\u306fexample.net\u306b\u5bfe\u3057\u3066F5\u3067\u30ea\u30ed\u30fc\u30c9\u3092\u3057\u305f\u3068\u304d\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u304a\u3088\u3073\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u306b<strong>Cache-Control: max-age=604800<\/strong>\u3068\u3042\u308b\u4ee5\u5916\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u30d8\u30c3\u30c0\u306b<strong>Cache-Control: max-age=0<\/strong>\u3068\u3042\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3059\u3002\uff08\u3061\u306a\u307f\u306bctrl+F5\u3060\u3068\u30ea\u30af\u30a8\u30b9\u30c8\u5074\u304c<strong>no-cache<\/strong>\u306b\u5909\u308f\u308a\u307e\u3059\uff09<\/p>\n\n\n\n<p>\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u884c\u3046\u969b\u306b\u3082Cache-Control\u304c\u3064\u304d\u307e\u3059\u304c\u3053\u308c\u306f\u4f55\u3092\u610f\u5473\u3057\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n<p>\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u306emax-age\u306f\u305d\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306eTTL\u3092\u6307\u5b9a\u3057\u307e\u3059\u304c\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30d8\u30c3\u30c0\u306f\u6307\u5b9a\u3057\u305fTTL\u4ee5\u4e0a\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u53d7\u3051\u5165\u308c\u308b\u6c17\u304c\u306a\u3044\u3001\u3064\u307e\u308amax-age=0\u306a\u306e\u30670\u79d2\u7d4c\u904e\u3057\u305f\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u6b32\u3057\u304f\u306a\u3044\u306e\u3067\u65b0\u3057\u3044\u306e\u304f\u3060\u3055\u3044\u3063\u3066\u3053\u3068\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3060\u3068\u3061\u3087\u3063\u3068\u308f\u304b\u308a\u3065\u3089\u3044\u3068\u601d\u3046\u306e\u3067\u96d1\u306b\u8a00\u3046\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u30ec\u30b9\u30dd\u30f3\u30b9\u7531\u6765\u306emax-age\u3092\u30ea\u30af\u30a8\u30b9\u30c8\u7531\u6765\u306emax-age\u306b\u4e00\u6642\u7684\u306b\u66f8\u304d\u63db\u3048\u3066\u8a55\u4fa1\u3059\u308b\u3068\u3044\u3063\u305f\u611f\u3058\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u3055\u3066\u3001\u3053\u308c\u3092\u8e0f\u307e\u3048\u3066\u5148\u307b\u3069\u306eno-cache\/no-store\u3092\u3082\u3046\u4e00\u5ea6\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>no-store\u306f\u683c\u7d0d\u3059\u308b\u3068\u304d\u306e\u6307\u5b9a\u306a\u308f\u3051\u3067\u3059\u304b\u3089\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u4e2d\u306b\u542b\u307e\u308c\u3066\u3044\u305f\u5834\u5408\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u683c\u7d0d\u3057\u306a\u3044\u3067\u306d\u3068\u3044\u3063\u305f\u52d5\u304d\u306b\u306a\u308a\u307e\u3059\u3002<br>\u3042\u307e\u308a\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u6642\u306e\u52d5\u304d\u3068\u5909\u308f\u3089\u306a\u3044\u3088\u3046\u306a\u6c17\u304c\u3057\u307e\u3059\u304c\u3001\u65e2\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u3042\u308b\u72b6\u614b\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<br>no-store\u306f\u5229\u7528\u6642\u306b\u306f\u8a55\u4fa1\u3055\u308c\u306a\u3044\u305f\u3081\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u30ec\u30b9\u30dd\u30f3\u30b9\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3068\u306f\u3044\u3048\u3001CDN\u3084Proxy\u306e\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u5bfe\u3057\u3066F5\u3067\u30ea\u30ed\u30fc\u30c9\u3057\u3066\u3082\u30aa\u30ea\u30b8\u30f3\u306b\u6bce\u56de\u691c\u8a3c\u3057\u3066\u304f\u308c\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br>\u5f53\u7136\u3068\u3044\u3048\u3070\u5f53\u7136\u306a\u306e\u3067\u3059\u304c\u3001\u5f8b\u5100\u306b\u5168\u90e8\u901a\u3057\u3066\u3044\u305f\u3089\u3042\u307e\u308aCDN\u306e\u610f\u5473\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u3058\u3083\u3042\u3069\u3053\u306b\u52b9\u304f\u306e\u304b\u3068\u3044\u3046\u3068\u30d6\u30e9\u30a6\u30b6\u306a\u3069\u306e\u30ed\u30fc\u30ab\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30ed\u30fc\u30ab\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u81ea\u4f53\u3092\u30b5\u30fc\u30d0\u30fc\u3068\u8003\u3048\u3066\u305d\u3053\u306b\u5bfe\u3057\u3066Cache-Control\u3092\u901a\u3058\u3066\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3063\u3066\u3044\u308b\u3068\u8003\u3048\u308b\u3068\u3057\u3063\u304f\u308a\u304f\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u306a\u306e\u3067xhr\u3067\u306e\u554f\u3044\u5408\u308f\u305b\u306e\u6642\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u308b\u3068\u304b\u56f0\u3063\u3066\u308b\u5834\u5408\u306f\u3053\u306e\u8fba\u308a\u3092\u601d\u3044\u51fa\u3057\u3066\u307f\u308b\u3068\u3088\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cache-Control\u306e\u89e3\u91c8\u306f\u5b9f\u88c5\u306b\u3088\u3063\u3066\u7570\u306a\u308b<\/h3>\n\n\n\n<p>\u30ea\u30af\u30a8\u30b9\u30c8\u30fb\u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u542b\u307e\u308c\u308bCache-Control\u306f\u3042\u304f\u307e\u3067\u6307\u5b9a\u3067\u3057\u304b\u306a\u304f\u3001\u305d\u306e\u89e3\u91c8\u306f\u53d7\u3051\u53d6\u3063\u305f\u5074\u306b\u59d4\u306d\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070no-store\u3092\u6307\u5b9a\u3057\u305f\u3068\u3057\u3066\u3082\u672c\u5f53\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u683c\u7d0d\u3057\u306a\u3044\u306e\u304b\u3068\u3044\u3046\u3068\u53d7\u3051\u53d6\u3063\u305f\u5b9f\u88c5\u4f9d\u5b58\u3068\u306a\u308b\u308f\u3051\u306a\u306e\u3067\u3001CDN\u3092\u4f7f\u3046\u5834\u5408\u306f\u3053\u306e\u8fba\u308a\u3082\u304d\u3061\u3093\u3068\u8abf\u3079\u3066\u304a\u304f\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u3061\u306a\u307f\u306b\u4eca\u307e\u3067\u898b\u305f\u4e2d\u3067\u4e00\u756a\u601d\u3044\u5207\u308a\u304c\u3044\u3044\u306a\u3068\u304a\u3082\u3063\u305f\u306e\u306f\u30b9\u30c6\u30fc\u30bf\u30b9200\u306a\u3089Cache-Control\u4e00\u5207\u898b\u306a\u3044\u3067X\u6642\u9593\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002\u3053\u3046\u3044\u3046\u306e\u3082\u3042\u308a\u307e\u3059<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">TTL\u306f\u7d4c\u8def\u4e0a\u3068\u30ed\u30fc\u30ab\u30eb\u3067\u5171\u901a<\/h3>\n\n\n\n<p>\u305f\u3068\u3048\u3070shared\u30ad\u30e3\u30c3\u30b7\u30e5\u3067max-age=3600\u3068\u6307\u5b9a\u3057\u305f\u5834\u5408\u3001\u7d4c\u8def\u4e0a\u30fb\u30ed\u30fc\u30ab\u30eb\u30671\u6642\u9593\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u304d\u307e\u3059\u3002<br>\u3053\u306e1\u6642\u9593\u306f\u305d\u308c\u305e\u308c\u3067\u306f\u306a\u304f\u5408\u7b97\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305f\u3068\u3048\u3070\u7d4c\u8def\u4e0a\u306730\u5206\u30ad\u30e3\u30c3\u30b7\u30e5\uff08Age: 1800\uff09\u3057\u305f\u3082\u306e\u306f\u30ed\u30fc\u30ab\u30eb\u3067\u306f30\u5206\u3057\u304b\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u6848\u5916\u3053\u306e\u8fba\u308a\u3092\u5931\u5ff5\u3057\u3084\u3059\u3044\u306e\u304b\u3001\u30b5\u30a4\u30c8\u3092\u773a\u3081\u3066\u3044\u308b\u3068Age\u30d8\u30c3\u30c0 &gt; max-age\u3068\u306a\u3063\u3066\u3044\u3066\u6bce\u56de\u691c\u8a3c\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u98db\u3093\u3067\u308b\u3068\u3044\u3063\u305f\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5148\u307b\u3069\u30ed\u30fc\u30ab\u30eb\u30fb\u7d4c\u8def\u4e0a\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f75\u7528\u3057\u3068\u89e6\u308c\u307e\u3057\u305f\u304c\u3001\u4f75\u7528\u3059\u308c\u3070\u5f53\u7136TTL\u306e\u5272\u308a\u632f\u308a\u3082\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3053\u3053\u307e\u3067\u306e\u307e\u3068\u3081<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u308c\u3070Cache-Control\u3092\u6307\u5b9a\u3057\u306a\u304f\u3066\u3082\u3055\u308c\u308b<\/li><li>Cache-Control\u306e\u89e3\u91c8\u306f\u5b9f\u88c5\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u306e\u3067CDN\u3092\u4f7f\u3046\u5834\u5408\u306f\u304d\u3061\u3093\u3068\u8abf\u3079\u3088\u3046<\/li><li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u683c\u7d0d\u3068\u5229\u7528\u306e2\u30b9\u30c6\u30fc\u30b8\u304c\u3042\u308b<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u5f8c\u306b<\/h2>\n\n\n\n<p>\u3053\u306e\u8fba\u308a\u306e\u8a71\u306f\u91cd\u8981\u306a\u306e\u3067\u3059\u304c\u3001\u6848\u5916\u89e6\u308c\u3066\u3044\u308b\u8a18\u4e8b\u304c\u306a\u3044\uff08\u3082\u3057\u304f\u306f\u77e5\u3063\u3066\u3044\u308b\u3082\u306e\u3068\u3057\u3066\u66f8\u304b\u308c\u3066\u3044\u308b\uff09\u306e\u3067\u3001<br>\u62bc\u3055\u3048\u3066\u304a\u304f\u3068\u3001\u69d8\u3005\u306a\u8a18\u4e8b\u306b\u3064\u3044\u3066\u3082\u8aad\u307f\u3084\u3059\u304f\u306a\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u3053\u306e\u8fba\u308a\u306e\u8a71\u3082\u542b\u3081\u3066\u3081\u3063\u3061\u3083\u8a73\u3057\u304f\u66f8\u3044\u3066\u307e\u3059\u306e\u3067\u3001\u3088\u304b\u3063\u305f\u3089\u8aad\u3093\u3067\u3082\u3089\u3048\u308b\u3068\u3046\u308c\u3057\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p><iframe style=\"width:120px;height:240px;\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" frameborder=\"0\" src=\"\/\/rcm-fe.amazon-adsystem.com\/e\/cm?lt1=_blank&amp;bc1=000000&amp;IS2=1&amp;bg1=FFFFFF&amp;fc1=000000&amp;lc1=0000FF&amp;t=yellowtail00-22&amp;language=ja_JP&amp;o=9&amp;p=8&amp;l=as4&amp;m=amazon&amp;f=ifr&amp;ref=as_ss_li_til&amp;asins=4297119250&amp;linkId=d2bf2be7d8c22e9d03afb3fd86ef9f31\"><\/iframe><\/p>\n<div class='wp_social_bookmarking_light'>        <div class=\"wsbl_hatena\"><a href='\/\/b.hatena.ne.jp\/add?mode=confirm&url=http%3A%2F%2Fblog.xcir.net%2F%3Fp%3D2806&title=HTTP%E3%82%AD%E3%83%A3%E3%83%83%E3%82%B7%E3%83%A5%E5%85%A5%E9%96%80%E3%81%AE%E5%85%A5%E9%96%80' title='\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0' rel=nofollow class='wp_social_bookmarking_light_a' target=_blank><img src='http:\/\/blog.xcir.net\/wp-content\/plugins\/wp-social-bookmarking-light\/public\/images\/hatena.gif' 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