{"id":53231,"date":"2024-10-09T09:26:19","date_gmt":"2024-10-09T01:26:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/53231\/"},"modified":"2024-10-09T09:26:19","modified_gmt":"2024-10-09T01:26:19","slug":"http-%e7%b7%a9%e5%ad%98%e9%a0%ad-last-modified-%e5%92%8c-etag-%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/53231\/","title":{"rendered":"HTTP \u7de9\u5b58\u982d Last-Modified \u548c ETag \u4ecb\u7d39"},"content":{"rendered":"<h1 id=\"http-%e7%b7%a9%e5%ad%98%e9%a0%ad-last-modified-%e5%92%8c-etag-%e4%bb%8b%e7%b4%b9-lIGWMYikVK\">HTTP \u7de9\u5b58\u982d Last-Modified \u548c ETag \u4ecb\u7d39<\/h1>\n<p>\u5728\u73fe\u4ee3\u7db2\u7d61\u61c9\u7528\u4e2d\uff0c\u6027\u80fd\u512a\u5316\u662f\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002HTTP \u7de9\u5b58\u982d\u662f\u5be6\u73fe\u9019\u4e00\u76ee\u6a19\u7684\u91cd\u8981\u5de5\u5177\uff0c\u5176\u4e2d <code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \u548c <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u662f\u5169\u500b\u5e38\u7528\u7684\u7de9\u5b58\u63a7\u5236\u6a5f\u5236\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u5169\u500b\u7de9\u5b58\u982d\u7684\u5de5\u4f5c\u539f\u7406\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"last-modified-lIGWMYikVK\">Last-Modified<\/h2>\n<p><code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \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 <code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \u982d\u90e8\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\u52a0\u8f09\u8cc7\u6e90\u3002<\/p>\n<h3 id=\"%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-lIGWMYikVK\">\u5de5\u4f5c\u539f\u7406<\/h3>\n<p>\u7576\u5ba2\u6236\u7aef\u518d\u6b21\u8acb\u6c42\u76f8\u540c\u7684\u8cc7\u6e90\u6642\uff0c\u5b83\u53ef\u4ee5\u5728\u8acb\u6c42\u4e2d\u5305\u542b <code>If-Modified-Since<\/code> \u982d\u90e8\uff0c\u4e26\u5c07\u5176\u8a2d\u7f6e\u70ba\u4e4b\u524d\u63a5\u6536\u5230\u7684 <code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \u503c\u3002\u4f3a\u670d\u5668\u6703\u6aa2\u67e5\u8a72\u8cc7\u6e90\u7684\u6700\u5f8c\u4fee\u6539\u6642\u9593\uff0c\u5982\u679c\u8cc7\u6e90\u81ea\u90a3\u6642\u4ee5\u4f86\u6c92\u6709\u88ab\u4fee\u6539\uff0c\u4f3a\u670d\u5668\u5c07\u8fd4\u56de <code>304 Not Modified<\/code> \u97ff\u61c9\uff0c\u544a\u8a34\u5ba2\u6236\u7aef\u4f7f\u7528\u7de9\u5b58\u7684\u7248\u672c\u3002<\/p>\n<pre><code>GET \/example.txt HTTP\/1.1\nHost: www.example.com\nIf-Modified-Since: Wed, 21 Oct 2015 07:28:00 GMT\n<\/code><\/pre>\n<p>\u5982\u679c\u8cc7\u6e90\u5df2\u88ab\u4fee\u6539\uff0c\u4f3a\u670d\u5668\u5c07\u8fd4\u56de\u65b0\u7684\u8cc7\u6e90\u548c\u66f4\u65b0\u7684 <code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \u503c\u3002<\/p>\n<h3 id=\"%e5%84%aa%e9%bb%9e-lIGWMYikVK\">\u512a\u9ede<\/h3>\n<ul>\n<li>\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u7db2\u7d61\u6d41\u91cf\uff1a\u5ba2\u6236\u7aef\u53ef\u4ee5\u907f\u514d\u91cd\u65b0\u4e0b\u8f09\u672a\u6539\u8b8a\u7684\u8cc7\u6e90\u3002<\/li>\n<li>\u63d0\u9ad8\u52a0\u8f09\u901f\u5ea6\uff1a\u4f7f\u7528\u7de9\u5b58\u7684\u8cc7\u6e90\u53ef\u4ee5\u66f4\u5feb\u5730\u5448\u73fe\u7d66\u7528\u6236\u3002<\/li>\n<\/ul>\n<h2 id=\"etag-lIGWMYikVK\">ETag<\/h2>\n<p><code id=\"etag-lIGWMYikVK\">ETag<\/code>\uff08Entity Tag\uff09\u662f\u53e6\u4e00\u7a2e HTTP \u97ff\u61c9\u982d\uff0c\u7528\u65bc\u6a19\u8b58\u7279\u5b9a\u7248\u672c\u7684\u8cc7\u6e90\u3002\u8207 <code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \u4e0d\u540c\uff0c<code id=\"etag-lIGWMYikVK\">ETag<\/code> \u662f\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\uff0c\u901a\u5e38\u662f\u57fa\u65bc\u8cc7\u6e90\u5167\u5bb9\u751f\u6210\u7684\u54c8\u5e0c\u503c\u3002<\/p>\n<h3 id=\"%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-lIGWMYikVK\">\u5de5\u4f5c\u539f\u7406<\/h3>\n<p>\u7576\u4f3a\u670d\u5668\u8fd4\u56de\u8cc7\u6e90\u6642\uff0c\u5b83\u6703\u9644\u52a0\u4e00\u500b <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u982d\u90e8\u3002\u5ba2\u6236\u7aef\u5728\u5f8c\u7e8c\u8acb\u6c42\u4e2d\u53ef\u4ee5\u4f7f\u7528 <code>If-None-Match<\/code> \u982d\u90e8\u4f86\u6aa2\u67e5\u8cc7\u6e90\u662f\u5426\u5df2\u66f4\u6539\u3002<\/p>\n<pre><code>GET \/example.txt HTTP\/1.1\nHost: www.example.com\nIf-None-Match: \"abc123\"\n<\/code><\/pre>\n<p>\u4f3a\u670d\u5668\u6703\u6bd4\u8f03\u5ba2\u6236\u7aef\u63d0\u4f9b\u7684 <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u503c\u8207\u7576\u524d\u8cc7\u6e90\u7684 <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u503c\u3002\u5982\u679c\u5169\u8005\u76f8\u540c\uff0c\u4f3a\u670d\u5668\u5c07\u8fd4\u56de <code>304 Not Modified<\/code> \u97ff\u61c9\uff1b\u5982\u679c\u4e0d\u540c\uff0c\u5247\u8fd4\u56de\u65b0\u7684\u8cc7\u6e90\u548c\u66f4\u65b0\u7684 <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u503c\u3002<\/p>\n<h3 id=\"%e5%84%aa%e9%bb%9e-lIGWMYikVK\">\u512a\u9ede<\/h3>\n<ul>\n<li>\u66f4\u7cbe\u78ba\u7684\u7de9\u5b58\u63a7\u5236\uff1a<code id=\"etag-lIGWMYikVK\">ETag<\/code> \u53ef\u4ee5\u66f4\u7cbe\u78ba\u5730\u8b58\u5225\u8cc7\u6e90\u7684\u7248\u672c\uff0c\u7279\u5225\u662f\u5728\u8cc7\u6e90\u5167\u5bb9\u983b\u7e41\u8b8a\u5316\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li>\u652f\u6301\u591a\u7a2e\u7de9\u5b58\u7b56\u7565\uff1a\u53ef\u4ee5\u6839\u64da\u4e0d\u540c\u7684\u9700\u6c42\u8a2d\u7f6e\u4e0d\u540c\u7684 <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u503c\u3002<\/li>\n<\/ul>\n<h2 id=\"last-modified-%e8%88%87-etag-%e7%9a%84%e6%af%94%e8%bc%83-lIGWMYikVK\">Last-Modified \u8207 ETag \u7684\u6bd4\u8f03<\/h2>\n<p>\u96d6\u7136 <code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \u548c <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u90fd\u662f\u7528\u65bc\u7de9\u5b58\u63a7\u5236\uff0c\u4f46\u5b83\u5011\u5404\u6709\u512a\u7f3a\u9ede\uff1a<\/p>\n<ul>\n<li><strong id=\"last-modified-lIGWMYikVK\">Last-Modified<\/strong>\uff1a\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u80fd\u4e0d\u5920\u7cbe\u78ba\uff0c\u7279\u5225\u662f\u7576\u8cc7\u6e90\u7684\u5167\u5bb9\u5728\u540c\u4e00\u6642\u9593\u5167\u591a\u6b21\u4fee\u6539\u6642\u3002<\/li>\n<li><strong id=\"etag-lIGWMYikVK\">ETag<\/strong>\uff1a\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u78ba\u5ea6\uff0c\u4f46\u9700\u8981\u4f3a\u670d\u5668\u751f\u6210\u548c\u7ba1\u7406\u552f\u4e00\u6a19\u8b58\u7b26\uff0c\u589e\u52a0\u4e86\u5be6\u73fe\u7684\u8907\u96dc\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-lIGWMYikVK\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u8a2d\u8a08\u9ad8\u6548\u7684\u7db2\u7d61\u61c9\u7528\u6642\uff0c\u5408\u7406\u4f7f\u7528 <code id=\"last-modified-lIGWMYikVK\">Last-Modified<\/code> \u548c <code id=\"etag-lIGWMYikVK\">ETag<\/code> \u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002\u9078\u64c7\u5408\u9069\u7684\u7de9\u5b58\u7b56\u7565\uff0c\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9748\u6d3b\u904b\u7528\u9019\u5169\u7a2e\u6280\u8853\uff0c\u5c07\u6709\u52a9\u65bc\u6e1b\u5c11\u4f3a\u670d\u5668\u8ca0\u64d4\u548c\u63d0\u5347\u52a0\u8f09\u901f\u5ea6\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3HTTP\u7de9\u5b58\u982dLast-Modified\u548cETag\u7684\u529f\u80fd\u8207\u61c9\u7528\uff0c\u63d0\u5347\u7db2\u7ad9\u6027\u80fd\u8207\u8cc7\u6e90\u7ba1\u7406\u6548\u7387\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-53231","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/53231","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=53231"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/53231\/revisions"}],"predecessor-version":[{"id":53232,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/53231\/revisions\/53232"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=53231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=53231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=53231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}