{"id":49440,"date":"2024-10-08T04:45:14","date_gmt":"2024-10-07T20:45:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/49440\/"},"modified":"2024-10-08T04:45:14","modified_gmt":"2024-10-07T20:45:14","slug":"http-%e5%bf%ab%e5%8f%96%e9%a0%ad-last-modified-%e5%92%8c-etag-%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/49440\/","title":{"rendered":"HTTP \u5feb\u53d6\u982d Last-Modified \u548c ETag \u4ecb\u7d39"},"content":{"rendered":"<h1 id=\"http-%e5%bf%ab%e5%8f%96%e9%a0%ad-last-modified-%e5%92%8c-etag-%e4%bb%8b%e7%b4%b9-edSmOnJAtd\">HTTP \u5feb\u53d6\u982d Last-Modified \u548c ETag \u4ecb\u7d39<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u7db2\u8def\u74b0\u5883\u4e2d\uff0c\u7db2\u7ad9\u7684\u6548\u80fd\u548c\u4f7f\u7528\u8005\u9ad4\u9a57\u81f3\u95dc\u91cd\u8981\u3002\u70ba\u4e86\u63d0\u9ad8\u7db2\u9801\u7684\u52a0\u8f09\u901f\u5ea6\uff0cHTTP \u5354\u8b70\u63d0\u4f9b\u4e86\u591a\u7a2e\u5feb\u53d6\u6a5f\u5236\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u5169\u500b\u5feb\u53d6\u982d\u662f Last-Modified \u548c ETag\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u5169\u500b\u5feb\u53d6\u982d\u7684\u5de5\u4f5c\u539f\u7406\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"last-modified-edSmOnJAtd\">Last-Modified<\/h2>\n<p>Last-Modified \u662f\u4e00\u500b HTTP \u97ff\u61c9\u982d\uff0c\u7528\u65bc\u6307\u793a\u8cc7\u6e90\u7684\u6700\u5f8c\u4fee\u6539\u6642\u9593\u3002\u7576\u5ba2\u6236\u7aef\u8acb\u6c42\u4e00\u500b\u8cc7\u6e90\u6642\uff0c\u4f3a\u670d\u5668\u6703\u8fd4\u56de\u8a72\u8cc7\u6e90\u7684 Last-Modified \u982d\uff0c\u544a\u8a34\u5ba2\u6236\u7aef\u8a72\u8cc7\u6e90\u7684\u6700\u5f8c\u66f4\u65b0\u6642\u9593\u3002\u5ba2\u6236\u7aef\u53ef\u4ee5\u6839\u64da\u9019\u500b\u6642\u9593\u4f86\u6c7a\u5b9a\u662f\u5426\u9700\u8981\u91cd\u65b0\u4e0b\u8f09\u8a72\u8cc7\u6e90\u3002<\/p>\n<h3 id=\"%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-edSmOnJAtd\">\u5de5\u4f5c\u539f\u7406<\/h3>\n<p>\u7576\u5ba2\u6236\u7aef\u7b2c\u4e00\u6b21\u8acb\u6c42\u8cc7\u6e90\u6642\uff0c\u4f3a\u670d\u5668\u6703\u8fd4\u56de\u8cc7\u6e90\u53ca\u5176 Last-Modified \u982d\u3002\u96a8\u5f8c\uff0c\u5ba2\u6236\u7aef\u5728\u5f8c\u7e8c\u8acb\u6c42\u4e2d\u53ef\u4ee5\u4f7f\u7528 If-Modified-Since \u982d\u4f86\u8a62\u554f\u4f3a\u670d\u5668\u8a72\u8cc7\u6e90\u662f\u5426\u81ea\u4e0a\u6b21\u8acb\u6c42\u4ee5\u4f86\u6709\u904e\u4fee\u6539\u3002\u4f3a\u670d\u5668\u6703\u6839\u64da\u8a72\u6642\u9593\u4f86\u6c7a\u5b9a\u662f\u5426\u8fd4\u56de 200 OK \u97ff\u61c9\u548c\u65b0\u7684\u8cc7\u6e90\uff0c\u6216\u662f\u8fd4\u56de 304 Not Modified \u97ff\u61c9\uff0c\u544a\u8a34\u5ba2\u6236\u7aef\u4f7f\u7528\u7de9\u5b58\u7684\u7248\u672c\u3002<\/p>\n<pre><code>HTTP\/1.1 200 OK\nLast-Modified: Wed, 21 Oct 2015 07:28:00 GMT\nContent-Type: text\/html\nContent-Length: 1234\n\n...\u8cc7\u6e90\u5167\u5bb9...<\/code><\/pre>\n<pre><code>GET \/resource HTTP\/1.1\nIf-Modified-Since: Wed, 21 Oct 2015 07:28:00 GMT\n<\/code><\/pre>\n<h3 id=\"%e5%84%aa%e9%bb%9e%e8%88%87%e9%99%90%e5%88%b6-edSmOnJAtd\">\u512a\u9ede\u8207\u9650\u5236<\/h3>\n<ul>\n<li><strong>\u512a\u9ede\uff1a<\/strong>Last-Modified \u7c21\u55ae\u6613\u7528\uff0c\u80fd\u6709\u6548\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u50b3\u8f38\u3002<\/li>\n<li><strong>\u9650\u5236\uff1a<\/strong>\u5982\u679c\u8cc7\u6e90\u7684\u4fee\u6539\u6642\u9593\u4e0d\u6e96\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u5ba2\u6236\u7aef\u4f7f\u7528\u904e\u671f\u7684\u7de9\u5b58\u3002<\/li>\n<\/ul>\n<h2 id=\"etag-edSmOnJAtd\">ETag<\/h2>\n<p>ETag\uff08Entity Tag\uff09\u662f\u53e6\u4e00\u500b HTTP \u97ff\u61c9\u982d\uff0c\u7528\u65bc\u6a19\u8b58\u7279\u5b9a\u7248\u672c\u7684\u8cc7\u6e90\u3002\u8207 Last-Modified \u4e0d\u540c\uff0cETag \u662f\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\uff0c\u901a\u5e38\u662f\u4f3a\u670d\u5668\u751f\u6210\u7684\u54c8\u5e0c\u503c\uff0c\u4ee3\u8868\u8cc7\u6e90\u7684\u5167\u5bb9\u3002<\/p>\n<h3 id=\"%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-edSmOnJAtd\">\u5de5\u4f5c\u539f\u7406<\/h3>\n<p>\u7576\u4f3a\u670d\u5668\u8fd4\u56de\u8cc7\u6e90\u6642\uff0c\u6703\u9644\u5e36\u4e00\u500b ETag \u982d\u3002\u5ba2\u6236\u7aef\u5728\u5f8c\u7e8c\u8acb\u6c42\u4e2d\u53ef\u4ee5\u4f7f\u7528 If-None-Match \u982d\u4f86\u8a62\u554f\u4f3a\u670d\u5668\u8a72\u8cc7\u6e90\u7684 ETag \u662f\u5426\u8207\u4e4b\u524d\u7684\u7248\u672c\u76f8\u7b26\u3002\u5982\u679c\u76f8\u7b26\uff0c\u4f3a\u670d\u5668\u6703\u8fd4\u56de 304 Not Modified \u97ff\u61c9\uff1b\u5982\u679c\u4e0d\u7b26\uff0c\u5247\u8fd4\u56de 200 OK \u97ff\u61c9\u548c\u65b0\u7684\u8cc7\u6e90\u3002<\/p>\n<pre><code>HTTP\/1.1 200 OK\nETag: \"abc123\"\nContent-Type: text\/html\nContent-Length: 1234\n\n...\u8cc7\u6e90\u5167\u5bb9...<\/code><\/pre>\n<pre><code>GET \/resource HTTP\/1.1\nIf-None-Match: \"abc123\"\n<\/code><\/pre>\n<h3 id=\"%e5%84%aa%e9%bb%9e%e8%88%87%e9%99%90%e5%88%b6-edSmOnJAtd\">\u512a\u9ede\u8207\u9650\u5236<\/h3>\n<ul>\n<li><strong>\u512a\u9ede\uff1a<\/strong>ETag \u63d0\u4f9b\u4e86\u66f4\u7cbe\u78ba\u7684\u5feb\u53d6\u63a7\u5236\uff0c\u80fd\u5920\u8b58\u5225\u8cc7\u6e90\u7684\u5177\u9ad4\u7248\u672c\u3002<\/li>\n<li><strong>\u9650\u5236\uff1a<\/strong>ETag \u7684\u751f\u6210\u548c\u7ba1\u7406\u53ef\u80fd\u6703\u589e\u52a0\u4f3a\u670d\u5668\u7684\u8ca0\u64d4\uff0c\u7279\u5225\u662f\u5728\u9ad8\u6d41\u91cf\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-edSmOnJAtd\">\u7e3d\u7d50<\/h2>\n<p>Last-Modified \u548c ETag \u662f\u5169\u7a2e\u91cd\u8981\u7684 HTTP \u5feb\u53d6\u982d\uff0c\u80fd\u5920\u6709\u6548\u63d0\u9ad8\u7db2\u7ad9\u7684\u6027\u80fd\u548c\u4f7f\u7528\u8005\u9ad4\u9a57\u3002Last-Modified \u4f9d\u8cf4\u65bc\u8cc7\u6e90\u7684\u6700\u5f8c\u4fee\u6539\u6642\u9593\uff0c\u800c ETag \u5247\u63d0\u4f9b\u4e86\u66f4\u7cbe\u78ba\u7684\u7248\u672c\u63a7\u5236\u3002\u6839\u64da\u5177\u9ad4\u9700\u6c42\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9078\u64c7\u9069\u5408\u7684\u5feb\u53d6\u7b56\u7565\u4f86\u512a\u5316\u7db2\u7ad9\u7684\u6548\u80fd\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u4f3a\u670d\u5668\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3HTTP\u5feb\u53d6\u982dLast-Modified\u548cETag\u7684\u529f\u80fd\uff0c\u5982\u4f55\u63d0\u9ad8\u7db2\u9801\u6548\u80fd\u53ca\u6e1b\u5c11\u4f3a\u670d\u5668\u8ca0\u64d4\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-49440","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/49440","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=49440"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/49440\/revisions"}],"predecessor-version":[{"id":49441,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/49440\/revisions\/49441"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=49440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=49440"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=49440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}