{"id":17661,"date":"2019-03-15T17:54:51","date_gmt":"2019-03-15T08:54:51","guid":{"rendered":"https:\/\/labs.gree.jp\/blog\/?p=17661"},"modified":"2019-03-15T18:14:51","modified_gmt":"2019-03-15T09:14:51","slug":"%e6%96%b0%e3%81%97%e3%81%84http%e6%8b%a1%e5%bc%b5-preload%e3%83%95%e3%83%ac%e3%83%bc%e3%83%a0-%e3%81%a8%e3%81%84%e3%81%86%e6%8f%90%e6%a1%88%e4%bb%95%e6%a7%98%e3%82%92%e6%9b%b8%e3%81%84%e3%81%9f","status":"publish","type":"post","link":"https:\/\/labs.gree.jp\/blog\/2019\/03\/17661\/","title":{"rendered":"\u65b0\u3057\u3044HTTP\u62e1\u5f35 \"PRELOAD\u30d5\u30ec\u30fc\u30e0\" \u3068\u3044\u3046\u63d0\u6848\u4ed5\u69d8\u3092\u66f8\u3044\u305f"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u30a4\u30f3\u30d5\u30e9\u306e\u5f8c\u85e4<\/a>\u3067\u3059\u3002<\/p>\n

\u6628\u5e74\u3001\u521d\u3081\u3066IETF\u306bHTTP\u306e\u62e1\u5f35\u4ed5\u69d8 \"The PRELOAD Frame Extension<\/a>\"\u3092\u63d0\u6848\u3057\u305f\u306e\u3067\u3001\u305d\u308c\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u4ed5\u69d8\u306e\u63d0\u6848\u3068\u306f<\/h2>\n

\u305d\u3082\u305d\u3082\u300cHTTP\u306e\u62e1\u5f35\u4ed5\u69d8\u3092\u63d0\u6848\u3057\u305f\u300d\u3068\u306f\u3069\u3046\u3044\u3046\u3053\u3068\u304b\u7c21\u5358\u306b\u88dc\u8db3\u3057\u307e\u3059\u3002<\/p>\n

HTTP\u3084TLS\u306e\u6a19\u6e96\u5316\u306fIETF\u3068\u3044\u3046\u7d44\u7e54\u3067\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002IETF\u3078\u306e\u4ed5\u69d8\u306e\u63d0\u6848\u306f\u3001\u57fa\u672c\u7684\u306b\u306fInternet-Draft\u3092\u51fa\u3059\u3053\u3068\u306b\u3088\u3063\u3066\u884c\u3044\u307e\u3059\u3002\u3053\u306eInternet-Draft\u3092\u51fa\u3057\u3001\u5404\u30ef\u30fc\u30ad\u30f3\u30b0\u30b0\u30eb\u30fc\u30d7\u306e\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u3067\u8b70\u8ad6\u3092\u884c\u3046\u306e\u304c\u4e00\u822c\u7684\u306a\u6d41\u308c\u3067\u3059\u3002<\/p>\n

\u500b\u4eba\u306e\u66f8\u3044\u305fInternet-Draft\u306fIndividual Draft\u3068\u547c\u3070\u308c\u3001\u8ab0\u3067\u3082\u51fa\u3059\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002\u4f1a\u54e1\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u306f\u306a\u304f\u3001\u4f55\u304b\u3057\u3089\u306e\u5be9\u67fb\u3082\u3042\u308a\u307e\u305b\u3093\u3002\u9069\u5207\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u4f5c\u6210\u3059\u308c\u3070Web\u4e0a\u306e\u63d0\u51fa\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u63d0\u51fa\u3059\u308b\u3060\u3051\u3067\u3059\u3002\u3082\u3061\u308d\u3093\u63d0\u6848\u3055\u308c\u305f\u4ed5\u69d8\u306f\u8ab0\u3067\u3082\u898b\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n

\u5b9f\u969b\u306e\u4f5c\u696d\u306f\u3001\"i-d-template<\/a>\"\u3092\u4f7f\u3046\u3068Markdown\u304b\u3089\u306e\u5909\u63db\u3084\u3001\u7ba1\u7406\u3001\u63d0\u51fa\u307e\u3067\u6bd4\u8f03\u7684\u7c21\u5358\u306b\u884c\u3048\u307e\u3059\u3002<\/p>\n

(IPR\u306e\u6271\u3044\u306a\u3069\u306fBCP 79<\/a>\u3092\u53c2\u7167\u304f\u3060\u3055\u3044\u3002)<\/p>\n

PREALOAD\u30d5\u30ec\u30fc\u30e0\u62e1\u5f35<\/h2>\n

\u3055\u3066\u3001\u672c\u984c\u3067\u3059\u3002<\/p>\n

\u63d0\u51fa\u3057\u305f\u6587\u66f8 \"The PRELOAD Frame Extension<\/a>\" \u3067\u66f8\u3044\u305f\u3068\u304a\u308a\u3001HTTP\/2\u3084HTTP\/3\u5411\u3051\u306bPRELOAD\u30d5\u30ec\u30fc\u30e0\u3092\u5b9a\u7fa9\u3059\u308b\u63d0\u6848\u306b\u306a\u308a\u307e\u3059\u3002\u30b5\u30fc\u30d0\u304c\u3053\u306ePRELOAD\u30d5\u30ec\u30fc\u30e0\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u30a2\u30af\u30bb\u30b9\u3057\u305fWeb\u30b5\u30a4\u30c8\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u308bCSS\u3084js\u306a\u3069\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u3088\u308a\u65e9\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

HTTP\u30d8\u30c3\u30c0\u306a\u3069\u304c\u65b0\u3057\u304f\u5b9a\u7fa9\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u62e1\u5f35\u3082HTTP\/2\u304b\u3089\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002HTTP\/2\u3067\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u5358\u4f4d\u306f\u30d5\u30ec\u30fc\u30e0\u3068\u3044\u3046\u5f62\u5f0f\u306b\u306a\u3063\u3066\u304a\u308a\u3001\u30d5\u30ec\u30fc\u30e0\u306bHTTP\u30d8\u30c3\u30c0\u3084\u30dc\u30c7\u30a3\u30fc\u30c7\u30fc\u30bf\u53ca\u3073\u901a\u4fe1\u30d1\u30e9\u30e1\u30fc\u30bf\u306a\u3069\u3092\u683c\u7d0d\u3057\u3066\u901a\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d5\u30ec\u30fc\u30e0\u3067\u306f\u72ec\u81ea\u306e\u30d5\u30ec\u30fc\u30e0\u30bf\u30a4\u30d7\u3092\u5b9a\u7fa9\u51fa\u6765\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304a\u308a\u3001\"ORIGIN\u30d5\u30ec\u30fc\u30e0\"\u306a\u3069\u5e7e\u3064\u304b\u306e\u62e1\u5f35\u4ed5\u69d8\u304c\u3059\u3067\u306b\u51fa\u3066\u3044\u307e\u3059\u3002<\/p>\n

HTTP\/2\u5b9f\u88c5\u306f\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u672a\u77e5\u306e\u30d5\u30ec\u30fc\u30e0\u3092\u5358\u7d14\u306b\u7121\u8996\u3059\u308b\u305f\u3081\u3001\u65e2\u5b58\u306e\u5b9f\u88c5\u306b\u5f71\u97ff\u306a\u304f\u65b0\u3057\u3044\u30d5\u30ec\u30fc\u30e0\u3092\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u63d0\u6848\u306e\u80cc\u666f<\/h3>\n

\u3053\u306e\u63d0\u6848\u306e\u80cc\u666f\u3068\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u3082\u7c21\u5358\u306b\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n

TLS1.3\u3084HTTP\/3(QUIC)\u3067\u306f\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u5f8c\u306b\u30b5\u30fc\u30d0\u304c\u6700\u521d\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3057\u3001\u3053\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u6a5f\u4f1a\u3092\u6709\u52b9\u6d3b\u7528\u3067\u304d\u3066\u3044\u307e\u305b\u3093\u3002\u30b5\u30fc\u30d0\u5074\u306f\u6700\u521d\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u308bServer Connection Preface\u3092\u9001\u4fe1\u3059\u308b\u3060\u3051\u3067\u3059\u3002\u305d\u306e\u5f8c\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306eHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u6765\u3066\u3084\u3063\u3068HTTP\u30ec\u30b9\u30dd\u30f3\u30b9(103\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9<\/a>\u3092\u542b\u3080)\u3084\u30b5\u30fc\u30d0\u30d7\u30c3\u30b7\u30e5(PUSH_PROMISE<\/a>)\u3092\u9001\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u6700\u521d\u306e\u9001\u4fe1\u6a5f\u4f1a\u3092\u6709\u52b9\u6d3b\u7528\u3057\u305f\u3044\u3068\u3044\u3046\u306e\u304c\u3001PRELOAD\u30d5\u30ec\u30fc\u30e0\u306e\u76ee\u7684\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

PREALOAD\u30d5\u30ec\u30fc\u30e0\u306e\u6982\u8981<\/h3>\n

PRELOAD\u30d5\u30ec\u30fc\u30e0\u3092\u7528\u3044\u3066\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306eHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5f85\u305f\u305a\u306b\u3001\u30b5\u30fc\u30d0\u306f\u8981\u6c42\u3055\u308c\u305fWeb\u30da\u30fc\u30b8\u3067\u5fc5\u8981\u3068\u306a\u308a\u305d\u3046\u306a\u30ea\u30bd\u30fc\u30b9\u3092\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u901a\u77e5\u51fa\u6765\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3088\u308a\u65e9\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5fc5\u8981\u306a\u30ea\u30bd\u30fc\u30b9\u306e\u53d6\u5f97\u3092\u59cb\u3081\u3089\u308c\u308b\u306e\u3067\u3001Web\u30da\u30fc\u30b8\u306e\u9ad8\u901f\u5316\u306b\u5bc4\u4e0e\u3067\u304d\u308b\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n

PRELOAD\u30d5\u30ec\u30fc\u30e0\u306f\u30b5\u30fc\u30d0\u304b\u3089\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002\u4e0b\u8a18\u306e\u3088\u3046\u306b\"Preload<\/a>\"\u306e\u4ed5\u69d8\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308bpreload\u60c5\u5831\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u306fPRELOAD\u30d5\u30ec\u30fc\u30e0\u3092\u53d7\u4fe1\u3059\u308b\u3068\u3001\u6307\u5b9a\u3055\u308c\u305f\u30ea\u30bd\u30fc\u30b9\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u306a\u3051\u308c\u3070HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u30ea\u30bd\u30fc\u30b9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n

Link: <https:\/\/example.com\/app\/script.js>; rel=preload; as=script<\/pre>\n
PRELOAD\u30d5\u30ec\u30fc\u30e0\u306e\u4e2d\u8eab\u306f\u5177\u4f53\u7684\u306b\u306f\u4e0b\u8a18\u306b\u793a\u3059\u3068\u304a\u308a\u3001HTTP\u30d8\u30c3\u30c0\u5727\u7e2e\u306e\u4ed5\u7d44\u307f\u3067\u3042\u308bHPACK<\/a>\u3084QPACK<\/a>\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u5f62\u5f0f\u3067\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u52d5\u7684\u30d8\u30c3\u30c0\u30c6\u30fc\u30d6\u30eb\u306f\u4f7f\u7528\u3057\u307e\u305b\u3093\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u4efb\u610f\u306ePRELOAD\u30d5\u30ec\u30fc\u30e0\u3092\u7121\u8996\u3067\u304d\u308b\u305f\u3081\u3001\u52d5\u7684\u30d8\u30c3\u30c0\u30c6\u30fc\u30d6\u30eb\u3092\u6b63\u3057\u304f\u540c\u671f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n
    0                   1                   2                   3\n    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1\n   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n   |                       Header Block (*)                      ...\n   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<\/pre>\n
\u901a\u4fe1\u30d5\u30ed\u30fc<\/h3>\n
TLS1.3\u3092\u7528\u3044\u305fHTTP\/2\u3067PRELOAD\u30d5\u30ec\u30fc\u30e0\u306e\u5229\u7528\u30a4\u30e1\u30fc\u30b8\u306f\u4e0b\u8a18\u306e\u901a\u308a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\"\"<\/p>\n
\u9752\u3044\u77e2\u5370\u306fTLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u3059\u3002\u8d64\u3044\u77e2\u5370\u306fTLS\u4e0a\u3067\u3084\u308a\u3068\u308a\u3055\u308c\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u3001\u3064\u307e\u308aHTTP\/2\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u3059\u3002<\/p>\n
TLS1.3\u3067\u306f\u30b5\u30fc\u30d0\u306e\u65b9\u304c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u3092\u5148\u306b\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002\u30b5\u30fc\u30d0\u306fFinished\u3092\u9001\u4fe1\u3057\u305f\u3042\u3068\u306b\u7d9a\u3051\u3066SETTINGS\u30d5\u30ec\u30fc\u30e0\u3068PRELOAD\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u3042\u3068\u306b\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u6700\u521d\u306eHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u904b\u3076HEADERS\u30d5\u30ec\u30fc\u30e0\u304c\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002\u901a\u5e38\u3067\u3042\u308c\u3070\u3001\u3053\u306e\u6700\u521d\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3078\u306e\u5fdc\u7b54\u304c\u306a\u3044\u3068\u30da\u30fc\u30b8\u3092\u8868\u793a\u3059\u308b\u306e\u306b\u5fc5\u8981\u306a\u30ea\u30bd\u30fc\u30b9(css, js, img)\u304c\u308f\u304b\u3089\u306a\u3044\u306e\u3067\u3059\u304c\u3001PRELOAD\u30d5\u30ec\u30fc\u30e0\u306b\u683c\u7d0d\u3055\u308c\u305fpreload\u60c5\u5831\u306e\u30ea\u30bd\u30fc\u30b9\u3082\u540c\u6642\u306b\u53d6\u5f97\u958b\u59cb\u3067\u304d\u308b\u305f\u3081\u3001\u305d\u308c\u3089\u306e\u30ea\u30bd\u30fc\u30b9\u306f1RTT\u5206\u65e9\u304f\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u4ed6<\/h3>\n
\u3053\u306ePRELOAD\u30d5\u30ec\u30fc\u30e0\u306b\u306f\u5e7e\u3064\u304b\u306e\u8b70\u8ad6\u304c\u3042\u308b\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n