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decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957090\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5f53\u51b0\u7bb1\u91cc\u6ca1\u6709\u83e0\u841d\u5305\u7684\u65f6\u5019\uff0c\u94c1\u9524\u59b9\u59b9\u4f1a\u53bb\u86cb\u7cd5\u5e97\u8d2d\u4e70\u83e0\u841d\u5305\uff0c\u8d2d\u4e70\u7684\u8fc7\u7a0b\u8868\u793a\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u5411\u670d\u52a1\u5668\u53d1\u51fa\u8bf7\u6c42\uff0c\u7ed3\u8d26\u4ed8\u94b1\u7684\u8fc7\u7a0b\u8868\u793a\u86cb\u7cd5\u5e97\u6b63\u5728\u6253\u5305\uff0c\u4e5f\u5c31\u662f\u670d\u52a1\u5668\u6b63\u5728\u5904\u7406\u8bf7\u6c42\u7684\u8fc7\u7a0b\uff0c\u968f\u540e\u670d\u52a1\u5668\u4f1a\u7ed9\u5ba2\u6237\u7aef\u4e00\u4e2a\u54cd\u5e94\uff0c\u8fd9\u4e2a\u54cd\u5e94\u5305\u542b<code>\u5f88\u591a\u4e1c\u897f<\/code>\uff0c\u81f3\u4e8e\u90fd\u6709\u4ec0\u4e48\uff0c\u540e\u9762\u4f1a\u8bf4\u5230\u3002<\/p>\n<p>\u94c1\u9524\u59b9\u59b9\u4e70\u5b8c\u83e0\u841d\u5305\u540e\uff0c\u653e\u5165\u51b0\u7bb1\u91cc\u4fdd\u9c9c\uff08\u52a0\u5165\u7f13\u5b58\uff09\uff0c\u7b49\u4e0b\u6b21\u60f3\u5403\u7684\u65f6\u5019\uff08\u540e\u7eed\u8bf7\u6c42\uff09\uff0c\u518d\u4ece\u51b0\u7bb1\uff08\u7f13\u5b58\uff09\u91cc\u62ff\uff0c\u4f46\u662f\u98df\u54c1\u90fd\u662f\u6709\u4e00\u4e2a\u4fdd\u8d28\u671f\u7684\uff0c\u5f53\u6709\u4e00\u5929\u8fc7\u671f\u540e\uff0c\u94c1\u9524\u59b9\u59b9\u4f1a\u95ee\u95ee\u86cb\u7cd5\u5e97\u8001\u677f\uff0c\u4f60\u8fd9\u83e0\u841d\u5305\u8fd8\u80fd\u4e0d\u80fd\u5403\uff1f\u5982\u679c\u8001\u677f\u8bf4\u8fd8\u80fd\u5403\uff0c\u94c1\u9524\u4e56\u4e56\u56de\u5bb6\u7ee7\u7eed\u5403\uff0c\u5982\u679c\u4e0d\u80fd\u5403\uff0c\u5219\u4ece\u65b0\u53d1\u8d77\u8d2d\u4e70\u8bf7\u6c42\uff0c\u4e70\u70b9\u65b0\u7684\u56de\u53bb\uff0c\u7ee7\u7eed\u5b58\u51b0\u7bb1\u3002<\/p>\n<p>\u6211\u518d\u603b\u7ed3\u4e00\u4e0b\u8fd9\u4e2a\u6d41\u7a0b\uff1a\u5f53\u5ba2\u6237\u7aef\uff08\u4e00\u822c\u6307\u6d4f\u89c8\u5668\uff09\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a\u8bf7\u6c42\u7684\u65f6\u5019\uff0c\u670d\u52a1\u5668\u4f1a\u7ed9\u5ba2\u6237\u7aef\u54cd\u5e94\u4e00\u4e9b\u4e1c\u897f\uff0c\u670d\u52a1\u5668\u4e3a\u4e86\u8282\u7701\u81ea\u8eab\u7684\u538b\u529b\uff0c\u4f1a\u5728\u54cd\u5e94\u6dfb\u52a0\u4e00\u4e9b\u547d\u4ee4\uff0c\u8ba9\u6d4f\u89c8\u5668\u7f13\u5b58\u8fd9\u4e9b\u6587\u4ef6\uff0c\u6d4f\u89c8\u5668\u5c06\u6587\u4ef6\u7f13\u5b58\u540e\uff0c\u5982\u679c\u4e4b\u540e\u9700\u8981\u8fd9\u4e9b\u6587\u4ef6\uff0c\u5219\u4f1a\u4ece\u7f13\u5b58\u62ff\uff0c\u4e0d\u4f1a\u518d\u6b21\u53d1\u9001\u8bf7\u6c42\uff0c\u4f46\u662f\u8fd9\u4e9b\u7f13\u5b58\u4e0d\u662f\u4e00\u76f4\u90fd\u6709\u6548\u7684\uff0c\u5230\u4e86\u8fc7\u671f\u65f6\u95f4\u540e\uff0c\u6d4f\u89c8\u5668\u4f1a\u95ee\u4e00\u4e0b\u670d\u52a1\u5668\uff0c\u6587\u4ef6\u8fc7\u671f\u4e86\uff0c\u73b0\u5728\u8fd8\u80fd\u7528\u5417\uff1f\u5982\u679c\u670d\u52a1\u5668\u56de\u7b54\u8bf4\uff1a\u53ef\u4ee5\u7ee7\u7eed\u7528\uff0c\u90a3\u6d4f\u89c8\u5668\u5c31\u7ee7\u7eed\u7528\u5457<\/p>\n<h3>\u6765\u81ea\u670d\u52a1\u5668\u7684\u5185\u5fc3\u72ec\u767d<\/h3>\n<p>\u5f53\u5ba2\u6237\u7aef\u53d1\u51fa\u4e00\u4e2aGET\u8bf7\u6c42\u5230\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u53ef\u80fd\u4f1a\u8fd9\u6837\u60f3\uff1a\u4f60\u8bf7\u6c42\u7684\u8fd9\u4e2a\u8d44\u6e90\u6211\u5f88\u5c11\u53d8\u52a8\uff0c\u4f60\u5e72\u8106\u7f13\u5b58\u8d77\u6765\u5427\uff01\u4ee5\u540e\u5c31\u4e0d\u8981\u518d\u6765\u70e6\u6211\u4e86\uff0c\u90a3\u4ec0\u4e48\u6837\u7684\u8d44\u6e90\u6587\u4ef6\u4f1a\u5f88\u5c11\u53d8\u52a8\u5462\uff1f\u50cf\u90a3\u4e9b\u56fe\u7247\u3001CSS\u3001JS\u7b49\u8d44\u6e90\u6587\u4ef6\u3002\u90a3\u5b83\u662f\u600e\u4e48\u544a\u8bc9\u5ba2\u6237\u7aef\u5c06\u8fd9\u4e9b\u6587\u4ef6\u7f13\u5b58\u8d77\u6765\u5462\uff1f\u4e3a\u4e86\u5b9e\u73b0\u5fc3\u4e2d\u8fd9\u7f8e\u597d\u7684\u613f\u671b\uff0c\u670d\u52a1\u5668\u4f1a\u5728<code>\u54cd\u5e94\u5934<\/code>\u4e2d\u52a0\u5165\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957091\" alt=\"carbon.png\" title=\"carbon.png\" loading=\"lazy\"><\/p>\n<p>\u8fd9\u4e2a\u54cd\u5e94\u5934\u4e2d\u5305\u542b\u4e86\u5982\u4e0b\u4fe1\u606f\uff1a<\/p>\n<ul>\n<li>\n<p><code>Cache-Control<\/code>: max-age=31536000   <\/p>\n<p>\u6211\u5e0c\u671b\u4f60\u53ef\u4ee5\u628a\u8fd9\u4e2a\u8d44\u6e90\u7f13\u5b58\u8d77\u6765\uff0c\u7f13\u5b58\u65f6\u95f4\u4e3a31636000\u79d2\uff08365\u5929\uff09<\/p>\n<\/li>\n<li>\n<p><code>Date<\/code>: Thu, 07 Jul 2022 21:35:20 GMT<\/p>\n<p>\u6211\u7ed9\u4f60\u54cd\u5e94\u8fd9\u4e2a\u8d44\u6e90\u7684\u670d\u52a1\u5668\u65f6\u95f4\u662f\u683c\u6797\u5a01\u6cbb\u65f6\u95f42022-07-07 21:35:20\uff0c\u5982\u679c\u7f13\u5b58\u7684\u65f6\u95f4\u662f365\u5929\uff0c\u90a3\u5c31\u662f\u5728\u6b64\u65f6\u95f4\u4e0a\u52a0\u4e0a365\u5929<\/p>\n<\/li>\n<li>\n<p><code>Etag<\/code>: W\/&#8221;3be5f29ac3de039909660e93e1ca5912&#8243;<\/p>\n<p>\u8fd9\u4e2a\u8d44\u6e90\u7f16\u53f7\u662f W\/&#8221;3be5f29ac3de039909660e93e1ca5912&#8243;<\/p>\n<\/li>\n<li>\n<p><code>Last-Modified<\/code>: Tue, 05 Jul 2022 15:09:26 GMT<\/p>\n<p>\u8fd9\u4e2a\u8d44\u6e90\u4e0a\u4e00\u6b21\u4fee\u6539\u65f6\u95f4\u662f\u683c\u6797\u5a01\u6cbb\u65f6\u95f4 2022-07-05 15:09:26<\/p>\n<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u5728\u54cd\u5e94\u5934\u4e2d\u6dfb\u52a0\u8fd9\u4e9b\u4fe1\u606f\uff0c\u670d\u52a1\u5668\u7684\u7f8e\u597d\u613f\u671b\u5c31\u4f20\u9012\u7ed9\u4e86\u5ba2\u6237\u7aef\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u662f\u5176\u5b83\u5e94\u7528\u7a0b\u5e8f\uff0c\u90a3\u5b83\u538b\u6839\u4e0d\u4f1a\u7406\u4f1a\u670d\u52a1\u5668\u7684\u613f\u671b\uff0c\u4f60\u7684\u613f\u671b\u8ddf\u6211\u6709\u6bdb\u5173\u7cfb\uff0c\u4f46\u662f\u6070\u597d\u8fd9\u91cc\u7684\u5ba2\u6237\u7aef\u662f\u4e00\u4e2a\u6d4f\u89c8\u5668\uff0c\u670d\u52a1\u5668\u548c\u6d4f\u89c8\u5668\u662f\u5f62\u5f71\u4e0d\u79bb\u7684\u597d\u57fa\u53cb\u3002<\/p>\n<p>\u90a3\u5f53\u6d4f\u89c8\u5668\u63a5\u6536\u5230\u6765\u81ea\u670d\u52a1\u5668\u7684\u7f8e\u597d\u613f\u671b\u8be5\u505a\u4e9b\u4ec0\u4e48\u5462\uff1f<\/p>\n<ul>\n<li>\u6d4f\u89c8\u5668\u4f1a\u5c06\u8fd9\u6b21\u8bf7\u6c42\u5f97\u5230\u7684\u54cd\u5e94\u4f53\u7f13\u5b58\u5728\u672c\u5730\u6587\u4ef6\u4e2d<\/li>\n<li>\u6d4f\u89c8\u5668\u4f1a\u8bb0\u5f55\u8fd9\u6b21\u8bf7\u6c42\u7684\u8bf7\u6c42\u65b9\u6cd5\u548c\u8bf7\u6c42\u8def\u5f84<\/li>\n<li>\u6d4f\u89c8\u5668\u4f1a\u8bb0\u5f55\u672c\u6b21\u7f13\u5b58\u65f6\u95f4\u662f31536000\u79d2<\/li>\n<li>\u6d4f\u89c8\u5668\u4f1a\u8bb0\u5f55\u670d\u52a1\u5668\u54cd\u5e94\u65f6\u95f4\u662f\u683c\u6797\u5a01\u6cbb\u65f6\u95f42022-07-07 21:35:20<\/li>\n<li>\u6d4f\u89c8\u5668\u4f1a\u8bb0\u5f55\u670d\u52a1\u5668\u7ed9\u4e88\u7684\u8d44\u6e90\u7f16\u53f7\u662fW\/&#8221;3be5f29ac3de039909660e93e1ca5912&#8243;<\/li>\n<li>\u6d4f\u89c8\u5668\u4f1a\u8bb0\u5f55\u4e0a\u4e00\u6b21\u8d44\u6e90\u4fee\u6539\u7684\u65f6\u95f4\u662f\u683c\u6797\u5a01\u6cbb\u65f6\u95f4 2022-07-05 15:09:26<\/li>\n<\/ul>\n<p>\u6d4f\u89c8\u5668\u7684\u8bb0\u5f55\u975e\u5e38\u91cd\u8981\uff0c\u5b83\u4e3a\u5c06\u6765\u8981\u4e0d\u8981\u8bf7\u6c42\u670d\u52a1\u5668\u63d0\u4f9b\u4e86\u4f9d\u636e\u3002\u6211\u4eec\u5728\u6d4f\u89c8\u5668\u4e2d\u53ef\u4ee5\u5f88\u6e05\u695a\u770b\u5230\u88ab\u7f13\u5b58\u5230\u78c1\u76d8\u7684\u6587\u4ef6(disk cache)\uff0c\u53d6\u6587\u4ef6\u7684\u65f6\u5019\u8017\u65f6\u975e\u5e38\u77ed<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957092\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u63a5\u7740\u6211\u4eec\u7684\u56fe\u53ef\u4ee5\u8fd9\u6837\u753b\ud83d\ude0e<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957093\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<h3>\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u5185\u5fc3\u72ec\u767d<\/h3>\n<p>\u5f53\u5ba2\u6237\u7aef\u6709\u4e86\u7f13\u5b58\u4e4b\u540e\uff0c\u518d\u6b21\u8bf7\u6c42<code>GET \/index.js<\/code>\u7684\u65f6\u5019\uff0c\u5b83\u7a81\u7136\u60f3\u8d77\u4e00\u4ef6\u4e8b\u60c5\uff0c\u6211\u6240\u9700\u8981\u7684\u4e1c\u897f\u5728\u4e0d\u5728\u7f13\u5b58\u91cc\u5462\uff1f\u90a3\u53c8\u662f\u5982\u4f55\u5224\u65ad\u7684\u5462\uff1f<\/p>\n<p>\u5224\u65ad\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u7f13\u5b58\u4e2d\u662f\u5426\u6709\u5339\u914d\u7684\u8bf7\u6c42\u65b9\u6cd5\u548c\u8def\u5f84<\/li>\n<li>\u7f13\u5b58\u4e2d\u5982\u679c\u5b58\u5728\uff0c\u90a3\u8be5\u7f13\u5b58\u8d44\u6e90\u662f\u5426\u5728\u6709\u6548\u671f\u5185\uff1f<\/li>\n<\/ul>\n<p>\u770b\u4e2a\u7b80\u56fe\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957094\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u8fd9\u5f20\u56fe\u5c31\u662f\u5224\u65ad\u6d41\u7a0b\uff0c\u5f53\u51c6\u5907\u8bf7\u6c42\u670d\u52a1\u5668\u7684\u65f6\u5019\uff0c\u9996\u5148\u4f1a\u5224\u65ad\u6709\u6ca1\u6709\u5339\u914d\u7684\u7f13\u5b58\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u90a3\u5c31\u662f\u666e\u901a\u7684\u4e00\u6b21\u8bf7\u6c42\u3002\u5982\u679c\u5b58\u5728\u7f13\u5b58\uff0c\u63a5\u4e0b\u6765\u5c31\u8981\u5224\u65ad\u7f13\u5b58\u6709\u6ca1\u6709\u8fc7\u671f\uff0c\u5982\u679c\u6ca1\u6709\u8fc7\u671f\uff0c\u90a3\u5c31\u4e0d\u9700\u8981\u8bf7\u6c42\u670d\u52a1\u5668\u4e86\uff0c\u76f4\u63a5\u4f7f\u7528\u7f13\u5b58\u7684\u5185\u5bb9\u3002\u5982\u679c\u8fc7\u671f\u4e86\uff0c\u6d4f\u89c8\u5668\u5e76\u4e0d\u4f1a\u5220\u9664\u8fd9\u4e2a\u7f13\u5b58\uff0c\u867d\u7136\u8fc7\u4e86\u5f88\u4e45\uff0c\u4f46\u662f\u6d4f\u89c8\u5668\u4f9d\u7136\u62b1\u7740\u4e00\u4e1d\u5e0c\u671b\uff0c\u56e0\u4e3a\u7f13\u5b58\u867d\u7136\u8fc7\u671f\u4e86\uff0c\u4f46\u662f\u6587\u4ef6\u672c\u8eab\u5e76\u6ca1\u6709\u6539\u53d8\uff0c\u8fd9\u65f6\u6d4f\u89c8\u5668\u4f1a\u8be2\u95ee\u4e00\u4e0b\u670d\u52a1\u5668\uff0c\u8fd9\u4e2a\u6587\u4ef6\u5230\u5e95\u53d8\u6ca1\u53d8\u554a\uff0c\u6ca1\u53d8\u90a3\u5c31\u7ee7\u7eed\u4f7f\u7528\uff0c\u8fd9\u79cd\u5e26\u7f13\u5b58\u7684\u8bf7\u6c42\u6211\u4eec\u4e00\u822c\u79f0\u4e3a<code>\u534f\u5546\u8bf7\u6c42<\/code><\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u56fe\u4f1a\u53d8\u6210\u8fd9\u4e2a\u6837\u5b50\u54e6\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957095\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<h4>\u7f13\u5b58\u6709\u6548<\/h4>\n<p>\u5f53\u6d4f\u89c8\u5668\u53d1\u73b0\u7f13\u5b58\u6709\u6548\u65f6\uff0c\u538b\u6839\u662f\u4e0d\u4f1a\u8bf7\u6c42\u670d\u52a1\u5668\u7684\uff0c\u76f4\u63a5\u4f7f\u7528\u7f13\u5b58\u7684\u5185\u5bb9\uff0c\u5373\u4f7f\u5904\u4e8e\u65e0\u7f51\u7edc\u73af\u5883\u4e0b\uff0c\u4f9d\u7136\u53ef\u4ee5\u6b63\u5e38\u6d4f\u89c8\u5df2\u7ecf\u7f13\u5b58\u7684\u5185\u5bb9\u3002\u7f13\u5b58\u6781\u5927\u51cf\u8f7b\u670d\u52a1\u5668\u7684\u538b\u529b\uff0c\u4f46\u662f\u5f53\u670d\u52a1\u5668\u66f4\u6539\u4e86\u8d44\u6e90\u540e\uff0c\u6d4f\u89c8\u5668\u662f\u4e0d\u77e5\u9053\u7684\uff0c\u53ea\u8981\u7f13\u5b58\u6709\u6548\uff0c\u5c31\u4f1a\u76f4\u63a5\u4f7f\u7528\u7f13\u5b58\u3002<\/p>\n<h4>\u7f13\u5b58\u65e0\u6548<\/h4>\n<p>\u5f53\u6d4f\u89c8\u5668\u53d1\u73b0\u7f13\u5b58\u5df2\u7ecf\u8fc7\u671f\u540e\uff0c\u5b83\u5e76\u4e0d\u4f1a\u7b80\u5355\u7684\u628a\u7f13\u5b58\u5220\u9664\uff0c\u800c\u662f\u62b1\u7740\u4e00\u4e1d\u5e0c\u671b\uff0c\u8be2\u95ee\u670d\u52a1\u5668\uff0c\u7f13\u5b58\u8fd8\u80fd\u7528\u5417\uff1f\u7136\u540e\u6d4f\u89c8\u5668\u4f1a\u53d1\u51fa\u4e00\u4e2a\u5e26\u7f13\u5b58\u7684\u8bf7\u6c42\uff0c\u6211\u4eec\u4e00\u822c\u79f0\u4e3a<code>\u534f\u5546\u8bf7\u6c42<\/code>\uff0c\u6240\u8c13\u7684\u5e26\u7f13\u5b58\u7684\u8bf7\u6c42\uff0c\u65e0\u975e\u662f\u52a0\u5165\u4e86\u4ee5\u4e0b\u8bf7\u6c42\u5934\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957096\" alt=\"carbon (1).png\" title=\"carbon (1).png\" loading=\"lazy\"><\/p>\n<ul>\n<li><code>If-Modified-Since<\/code>: Tue, 05 Jul 2022 15:09:26 GMT<\/li>\n<\/ul>\n<p>\u4eb2\u7231\u7684\uff0c\u4f60\u66fe\u7ecf\u544a\u8bc9\u8fc7\u6211\uff0c\u8fd9\u4e2a\u8d44\u6e90\u4e0a\u4e00\u6b21\u4fee\u6539\u65f6\u95f4\u662f\u683c\u6797\u5a01\u6cbb\u65f6\u95f4 2022-07-05 15:09:26\uff0c\u4e0d\u77e5\u9053\u5728\u8fd9\u4e2a\u65f6\u95f4\u4e4b\u540e\u6709\u53d8\u52a8\u5417\uff1f<\/p>\n<ul>\n<li><code>If-None-Match<\/code>:  W\/&#8221;3be5f29ac3de039909660e93e1ca5912&#8243;<\/li>\n<\/ul>\n<p>\u5b9d~\uff0c\u6211\u8bb0\u5f97\u4f60\u4e4b\u524d\u8ddf\u6211\u8bf4\u8fc7\uff0c\u8fd9\u4e2a\u8d44\u6e90\u7f16\u53f7\u662f  W\/&#8221;3be5f29ac3de039909660e93e1ca5912&#8243; \uff0c\u8bf7\u95ee\u8fd9\u4e2a\u8d44\u6e90\u7f16\u53f7\u73b0\u5728\u53d1\u751f\u6539\u53d8\u4e86\u5417\uff1f<\/p>\n<p>\u603b\u7ed3\u8d77\u6765\u5c31\u4e00\u53e5\u8bdd\uff1a\u4f60\u5feb\u544a\u8bc9\u6211\u8fd9\u4e2a\u8d44\u6e90\u5230\u5e95\u53d8\u4e86\u6ca1\uff1f\u4e4b\u6240\u4ee5\u8981\u53d1\u8fd9\u4e24\u6761\u6d88\u606f\uff0c\u662f\u4e3a\u4e86\u517c\u5bb9\u4e0d\u540c\u7684\u670d\u52a1\u5668\uff0c\u56e0\u4e3a\u6709\u7684\u670d\u52a1\u5668\u53ea\u8ba4<code>If-Modified-Since<\/code>\uff0c\u800c\u6709\u7684\u670d\u52a1\u5668\u53ea\u8ba4<code>If-None-Match<\/code>\uff0c\u6709\u4e9b\u4e24\u4e2a\u90fd\u8ba4\u3002\u76ee\u524d\u6709\u5f88\u591a\u670d\u52a1\u5668\uff0c\u53ea\u8981\u53d1\u73b0<code>If-None-Match<\/code>\u5b58\u5728\uff0c\u5c31\u4e0d\u4f1a\u53bb\u770b<code>If-Modified-Since<\/code>\uff0c<code>If-Modified-Since<\/code>\u662fhttp1.0\u7248\u672c\u89c4\u8303\uff0c<code>If-None-Match<\/code>\u662fhttp1.1\u7684\u89c4\u8303<\/p>\n<p>\u6b64\u65f6\uff0c\u53c8\u628a\u95ee\u9898\u629b\u7ed9\u4e86\u670d\u52a1\u5668\uff0c\u6211\u4eec\u6765\u770b\u770b\u670d\u52a1\u5668\u53c8\u662f\u5982\u4f55\u8868\u6f14\u7684\ud83d\ude0e<\/p>\n<p>\u5f53\u6d4f\u89c8\u5668\u8be2\u95ee\u670d\u52a1\u5668\uff1a\u4eb2\u7231\u7684\uff0c\u4f60\u7684\u5fc3\u5230\u5e95\u53d8\u6ca1\u53d8\uff1f\u670d\u52a1\u5668\u4f1a\u4ea7\u751f\u4e24\u79cd\u60c5\u51b5<\/p>\n<ul>\n<li>\u5b9d\uff0c\u6211\u53d8\u4e86\uff0c\u6211\u4eec\u4e0d\u5408\u9002\uff1a<em>\u7f13\u5b58\u5df2\u7ecf\u8fc7\u671f<\/em><\/li>\n<li>\u6211\u6ca1\u6709\u53d8\uff0c\u6211\u4f9d\u7136\u7231\u4f60\uff1a<em>\u7f13\u5b58\u4f9d\u7136\u6709\u6548<\/em><\/li>\n<\/ul>\n<p>\u5982\u679c\u7f13\u5b58\u5df2\u7ecf\u8fc7\u671f\uff0c\u670d\u52a1\u5668\u4f1a\u518d\u6b21\u7ed9\u4e88\u4e00\u4e2a\u6b63\u5e38\u7684\u54cd\u5e94\uff08\u54cd\u5e94\u7801200\uff0c\u5e26\u54cd\u5e94\u4f53\uff09\uff0c\u540c\u65f6\u4f1a\u9644\u5e26\u4e0a\u65b0\u7684\u7f13\u5b58\u6307\u4ee4\uff0c\u8fd9\u5c31\u56de\u5230\u4e86\u524d\u9762\u8bf4\u7684\u6765\u81ea\u670d\u52a1\u5668\u7684\u5185\u5fc3\u72ec\u767d\uff0c\u5ba2\u6237\u7aef\u4f1a\u91cd\u65b0\u7f13\u5b58\u65b0\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u5982\u679c\u670d\u52a1\u5668\u89c9\u5f97\u7f13\u5b58\u4f9d\u7136\u6709\u6548\uff0c\u90a3\u4e48\u670d\u52a1\u5668\u4f1a\u901a\u8fc7\u4e00\u79cd\u975e\u5e38\u7b80\u5355\u7684\u65b9\u5f0f\u544a\u8bc9\u6d4f\u89c8\u5668\uff1a<\/p>\n<ul>\n<li>\u54cd\u5e94\u7801\u4e3a304 Not Modified<\/li>\n<li>\u6ca1\u6709\u54cd\u5e94\u4f53<\/li>\n<li>\u54cd\u5e94\u5934\u4f1a\u5e26\u4e0a\u65b0\u7684\u7f13\u5b58\u6307\u4ee4<\/li>\n<\/ul>\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u5c31\u76f8\u5f53\u4e8e\u544a\u8bc9\u6d4f\u89c8\u5668\uff1a\u4f60\u7684\u7f13\u5b58\u4f9d\u7136\u53ef\u4ee5\u7ee7\u7eed\u4f7f\u7528\uff0c\u6211\u7ed9\u4f60\u4e00\u4e2a\u65b0\u7684\u7f13\u5b58\u65f6\u95f4\uff0c\u4f60\u90a3\u8fb9\u66f4\u65b0\u4e00\u4e0b\u5c31\u884c\u3002\u7136\u540e\uff0c\u6d4f\u89c8\u5668\u7ee7\u7eed\u6109\u5feb\u5730\u4f7f\u7528\u7f13\u5b58\u4e86\u3002<\/p>\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u6700\u5927\u7a0b\u5ea6\u4e0a\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\uff0c\u56e0\u4e3a\u5982\u679c\u8d44\u6e90\u8fd8\u6709\u6548\uff0c\u670d\u52a1\u5668\u5c31\u4e0d\u4f1a\u4f20\u8f93\u6d88\u606f\u4f53\u3002<\/p>\n<p>\u7ecf\u8fc7\u4ee5\u4e0a\u6d41\u7a0b\uff0c\u6211\u4eec\u7684\u56fe\u5c31\u4f1a\u53d8\u6210\u8fd9\u6837\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957097\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<h3>\u8865\u5145\u4e00\u4e9b\u77e5\u8bc6\u70b9<\/h3>\n<h4>Cache-Control<\/h4>\n<p><code>Cache-Control<\/code>\u5728\u4e0a\u9762\u5df2\u7ecf\u8bf4\u8fc7\u4e86\uff0c\u5b83\u662f\u670d\u52a1\u5668\u5411\u6d4f\u89c8\u5668\u54cd\u5e94\u7684\u4e00\u4e2a\u6d88\u606f\u5934\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a<code>max-age<\/code>\u7528\u4e8e\u6307\u5b9a\u7f13\u5b58\u65f6\u95f4\u3002\u5b9e\u9645\u4e0a\u5b83\u8fd8\u6709\u5176\u4ed6\u503c\u53ef\u4ee5\u9009\u62e9\u3002<\/p>\n<ul>\n<li>public\uff1a\u8868\u793a\u670d\u52a1\u5668\u8d44\u6e90\u662f\u516c\u5f00\u7684\uff0c\u5bf9\u4e8e\u6d4f\u89c8\u5668\u6765\u8bf4\u5e76\u6ca1\u6709\u4ec0\u4e48\u610f\u4e49\uff0c\u56e0\u4e3a\u5927\u5bb6\u770b\u5230\u7684\u4e1c\u897f\u90fd\u662f\u4e00\u6837\u7684\uff0c\u6ca1\u6709\u53d8\u5316\uff0c\u4e5f\u8bb8\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\u6709\u7528\u3002<\/li>\n<li>private\uff1a\u8868\u793a\u670d\u52a1\u5668\u8d44\u6e90\u662f\u79c1\u6709\u7684\uff0c\u6bd4\u5982\u67d0\u4e2a\u670d\u52a1\u5668\u8d44\u6e90\uff0c\u6bcf\u4e2a\u7528\u6237\u770b\u5230\u7684\u90fd\u4e0d\u4e00\u6837\uff0chttp\u534f\u8bae\u4e2d\u5f88\u591a\u65f6\u5019\u90fd\u662f\u5ba2\u6237\u7aef\u6216\u8005\u670d\u52a1\u5668\u544a\u8bc9\u53e6\u4e00\u7aef\u8be6\u7ec6\u7684\u4fe1\u606f\uff0c\u81f3\u4e8e\u53e6\u4e00\u7aef\u7528\u4e0d\u7528\u5b8c\u5168\u81ea\u5df1\u51b3\u5b9a\u3002<\/li>\n<li>no-cache\uff1a\u8fd9\u4e2a\u503c\u770b\u8d77\u6765\u5b57\u9762\u610f\u601d\u662f\u4e0d\u7f13\u5b58\u7684\u610f\u601d\ud83d\ude02\uff0c\u5176\u5b9e\u4e0d\u7136\uff0c\u5b83\u4f1a\u544a\u8bc9\u6d4f\u89c8\u5668\uff0c\u4f60\u53ef\u4ee5\u7f13\u5b58\u8fd9\u4e2a\u8d44\u6e90\uff0c\u4f46\u662f\u4e0d\u8981\u76f4\u63a5\u4f7f\u7528\u5b83\u3002\u5f53\u4f60\u7f13\u5b58\u540e\uff0c\u6bcf\u4e00\u6b21\u8bf7\u6c42\u90fd\u9700\u8981\u9644\u5e26\u7f13\u5b58\u6307\u4ee4\uff0c\u6bcf\u4e00\u6b21\u8bf7\u6c42\u90fd\u9700\u8981\u95ee\u4e00\u4e0b\u624d\u884c\uff0c\u76f8\u5f53\u4e8e\u6bcf\u4e00\u6b21\u90fd\u662f\u534f\u5546\u7f13\u5b58<\/li>\n<li>no-store\uff1a\u544a\u8bc9\u6d4f\u89c8\u5668\u4e0d\u8981\u7f13\u5b58\u8fd9\u4e2a\u8d44\u6e90\uff0c\u540e\u9762\u6bcf\u4e00\u6b21\u8bf7\u6c42\u90fd\u6309\u7167\u666e\u901a\u8bf7\u6c42\u8fdb\u884c\uff0c<\/li>\n<li>max-age:\u8fd9\u4e2a\u5c31\u4e0d\u8bf4\u4e86\u5427 \ud83d\ude0e<\/li>\n<\/ul>\n<h4>Expires<\/h4>\n<p><code>Expires<\/code>\u662f\u5f88\u65e9\u4e4b\u524d\u7684\u4e00\u4e2a\u5b57\u6bb5\uff0c\u5728http1.0\u7248\u672c\u4e2d\u901a\u8fc7Expires\u54cd\u5e94\u5934\u6307\u5b9a\u8fc7\u671f\u7684\u65f6\u95f4\u70b9\u3002\u73b0\u5728\u90fd\u662f\u4f7f\u7528Cache-Control\uff1amax-age\u6765\u6307\u5b9a\u8fc7\u671f\u65f6\u95f4\uff0c\u6709\u4e9b\u670d\u52a1\u5668\u4e3a\u4e86\u517c\u5bb9\u5176\u5b83\u6d4f\u89c8\u5668\u4e5f\u662f\u4f1a\u52a0\u4e0aExpires<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957098\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<h4>\u7f13\u5b58\u65f6\u95f4\u7684\u6709\u6548\u671f<\/h4>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957099\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5f53\u6d4f\u89c8\u5668\u6536\u5230\u6765\u81ea\u670d\u52a1\u5668\u7684\u54cd\u5e94\u4e4b\u540e\uff0c\u9996\u5148\u5b83\u4f1a\u68c0\u67e5\u662f\u5426\u6709max-age\uff0c\u5982\u679c\u6709\uff0c\u7ee7\u7eed\u770b\u4e0b\u662f\u5426\u5b58\u5728Date\u5b57\u6bb5\uff0c\u5982\u679c\u4e5f\u6709\uff0c\u90a3\u4e48\u7f13\u5b58\u8fc7\u671f\u65f6\u95f4\u5c31\u662f <code>Date + max-age<\/code>\uff0c\u5982\u679c\u6ca1\u6709Date\u5b57\u6bb5\uff0c\u90a3\u4e48\u8fc7\u671f\u65f6\u95f4\u5c31\u662f<code>\u5f53\u524d\u5ba2\u6237\u7aef\u65f6\u95f4 + max-age<\/code>\u3002<\/p>\n<p>\u5982\u679c\u6ca1\u6709max-age\uff0c\u90a3\u4e48\u4f1a\u7ee7\u7eed\u68c0\u67e5\u662f\u5426\u6709<code>Last-Modified<\/code>\u5b57\u6bb5\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u5c31\u4e0d\u9700\u8981\u7f13\u5b58\u4e86\uff0c\u5982\u679c\u6709\uff0c\u90a3\u4e48\u7f13\u5b58\u8fc7\u671f\u65f6\u95f4\u8fc7\u671f\u4e3a<code>\uff08\u5f53\u524d\u5ba2\u6237\u7aef\u65f6\u95f4 -\u00a0Last-Modified\uff09\/ 10\u00a0<\/code><\/p>\n<h4>Pragma<\/h4>\n<p><code>Pragma<\/code>\u662fhttp1.0\u7248\u672c\u7684\u6d88\u606f\u5934\uff0c\u5f53\u8be5\u6d88\u606f\u5934\u51fa\u73b0\u5728\u8bf7\u6c42\u4e2d\u65f6\uff0c\u662f\u4e3a\u4e86\u544a\u8bc9\u670d\u52a1\u5668\u4e0d\u9700\u8981\u7f13\u5b58\uff0c\u6b63\u5e38\u8bf7\u6c42\u5c31\u884c\u3002<br \/>\u7136\u800c\u5728http1.1\u4e2d\u4f7f\u7528Cache-Control\uff1ano-cache\u6765\u8868\u793a\u3002\u5f53\u6211\u4eec\u5728\u8c03\u8bd5\u5de5\u5177\u4e2d\u52fe\u9009<code>Disable cache<\/code>\u65f6\uff0c\u5c31\u4f1a\u663e\u793a\u51faPragma\u5b57\u6bb5<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000043957100\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<h2>\u6700\u540e<\/h2>\n<p>\u5982\u679c\u672c\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff0c\u6216\u8005\u4f60\u6709\u4ec0\u4e48\u7591\u95ee\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\uff0c\u6211\u4e00\u822c\u770b\u5230\u90fd\u4f1a\u56de\u590d\u7684\u3002\u5927\u5bb6\u70b9\u8d5e\u652f\u6301\u4e00\u4e0b\u554a~\ud83c\udf38\uff0c\u70b9\u51fb\u94fe\u63a5\u5373\u53ef\u5173\u6ce8\u00a0<a href=\"https:\/\/link.segmentfault.com\/?enc=wyTiOuTUsCbVNH60Kkdv7Q%3D%3D.ZqEpwTPrc1NzRtPUiSywnOQhTm1%2BzcUKG2t40%2B1Y22KmT8VhKOlA%2FFRxocQjqjli\" rel=\"nofollow\" title=\"https:\/\/juejin.cn\/user\/1574156383557255\">\u6cd5\u533b<\/a>\ud83d\udcaa<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000043957088\">https:\/\/segmentfault.com\/a\/1190000043957088<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7231\u60c5\u8fd9\u4e2a\u8bcd\u7edd\u5bf9\u4e0d\u662f\u865a\u5e7b\u7684\u3001\u7cbe\u795e\u7684\uff0c\u800c\u662f\u5ba2\u89c2\u7684\u3001\u7269\u8d28\u7684\uff0c\u662f\u4e00\u7cfb\u5217\u5316\u5b66\u53cd\u5e94\u7684\u7ed3\u679c\uff0c\u6bcf\u4e00\u6b21\u7231\u60c5\u7684\u53d1\u751f\u90fd\u5206\u4e3a\u4e09\u4e2a\u9636\u6bb5\uff0c [&hellip;]<\/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":[4],"tags":[],"class_list":["post-10008022","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008022","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008022"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008022\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008022"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008022"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008022"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}