{"id":266,"date":"2021-06-27T22:20:18","date_gmt":"2021-06-27T14:20:18","guid":{"rendered":"http:\/\/gjweb.top\/?p=266"},"modified":"2021-06-27T22:20:19","modified_gmt":"2021-06-27T14:20:19","slug":"%e6%b5%85%e8%b0%88http%e7%bc%93%e5%ad%98","status":"publish","type":"post","link":"https:\/\/gjweb.top\/?p=266","title":{"rendered":"\u6d45\u8c08HTTP\u7f13\u5b58"},"content":{"rendered":"\n<p>HTTP\u6362\u5185\u5b58\u5e94\u8be5\u7b97\u662f\u524d\u7aef\u5f00\u53d1\u4e2d\u5e38\u63a5\u89e6\u7684\u7f13\u5b58\u673a\u5236\u4e4b\u4e00,\u4ed6\u53c8\u8bfe\u7ec6\u5206\u4e3a\u5f3a\u5236\u7f13\u5b58\u4e0e\u534f\u5546\u7f13\u5b58,\u4e8c\u8005\u6700\u5927\u7684\u533a\u522b\u5728\u4e8e\u5224\u65ad\u7f13\u5b58\u547d\u4e2d\u65f6,\u6d4f\u89c8\u5668\u662f\u5426\u9700\u8981\u670d\u52a1\u5668\u8fdb\u884c\u8be2\u95ee\u4ee5\u534f\u5546\u7f13\u5b58\u7684\u76f8\u5173\u4fe1\u606f,\u800c\u8fdb\u884c\u5224\u65ad\u662f\u5426\u9700\u8981\u76f8\u5e94\u5185\u5bb9\u8fdb\u884c\u91cd\u65b0\u8bf7\u6c42.\u4e0b\u9762\u5c31\u6765\u5177\u4f53\u770bHTTP\u7f13\u5b58\u7684\u5177\u4f53\u673a\u5236\u53ca\u7f13\u5b58\u7684\u51b3\u7b56\u7b56\u7565.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5f3a\u5236\u7f13\u5b58 \uff08200\u5185\u5b58\u7f13\u5b58)<\/h2>\n\n\n\n<p>\u65e0\u9700\u548c\u6d4f\u89c8\u5668\u901a\u4fe1,\u76f4\u63a5\u8bfb\u53d6\u7f13\u5b58\u5185\u5bb9<\/p>\n\n\n\n<p>\u8bf7\u6c42\u5934\u4fe1\u606f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>access-control-allow-origin:*\r\nage:734978\r\ncontent-length:40830\r\ncontent-type:image\/joeg\r\ncache-control:max-age=31536000\r\nexpires: Web,14 Fed 2021 12:23:42 GMT<\/code><\/pre>\n\n\n\n<p>\u5f3a\u5236\u7f13\u5b58\u76f8\u5173\u7684\u4e24\u4e2a\u5b57\u6bb5\u662fexpires\u548ccache-control<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>expires<ul><li>\u662f\u5728HTTP1.0\u534f\u8bae\u4e2d\u58f0\u660e\u7684\u7528\u6765\u63a7\u5236\u7f13\u5b58\u5931\u6548\u65e5\u671f\u7684\u65f6\u95f4\u6233\u5b57\u6bb5, \u4ed6\u7531\u670d\u52a1\u7aef\u6307\u5b9a\u540e\u901a\u8fc7\u54cd\u5e94\u5934\u544a\u77e5\u6d4f\u89c8\u5668\u8fdb\u884c\u7f13\u5b58<\/li><li>\u4e4b\u540e\u6d4f\u89c8\u5668\u5728\u53d1\u8d77\u76f8\u7684\u8d44\u6e90\u8bf7\u6c42\u65f6\uff0c\u4fbf\u4f1a\u5bf9\u6bd4expires\u4e0e\u672c\u5730\u7684\u65f6\u95f4\u6233<\/li><li>\u7f3a\u70b9<ul><li>\u4f1a\u53d7\u5230\u672c\u5730\u65f6\u95f4\u7684\u5f71\u54cd\uff0c\u5982\u679c\u672c\u5730\u65f6\u95f4\u66f4\u6539\u4e3a\u7f13\u5b58\u65f6\u95f4\u4e00\u6837\u5219\u4f1a\u4e00\u76f4\u8bfb\u7f13\u5b58<\/li><\/ul><\/li><\/ul><\/li><li>cache-control<ul><li>\u4e3a\u4e86\u89e3\u51b3expires\u7684\u7f3a\u70b9\uff0c\u65b0\u589e\u4e86cache-control\u5b57\u6bb5<\/li><li>\u4ee5\u79d2\u4e3a\u65f6\u95f4\u5355\u4f4d<\/li><li>\u53ef\u6269\u5c55\u6027\u8f83\u5f3a<\/li><\/ul><\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">cache-control \u4e2d\u7684\u5c5e\u6027<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">no-cache \u548c no-store<\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>no-cache<ul><li>\u8868\u793a\u4f7f\u7528\u534f\u5546\u7f13\u5b58<\/li><\/ul><\/li><li>no-store<ul><li>\u8868\u793a\u4e0d\u9002\u7528\u4efb\u4f55\u7f13\u5b58\uff08\u9ed8\u8ba4\uff09<\/li><\/ul><\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">private \u548c public<\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>private<ul><li>\u8868\u793a\u65e2\u88ab\u6d4f\u89c8\u5668\u7f13\u5b58\uff0c\u4e5f\u53ef\u4ee5\u670d\u52a1\u5668\u7f13\u5b58<\/li><\/ul><\/li><li>public<ul><li>\u8868\u793a\u53ea\u80fd\u88ab\u6d4f\u89c8\u5668\u7f13\u5b58\uff08\u9ed8\u8ba4\uff09<\/li><\/ul><\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">max-age \u548c s-maxage<\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>max-age<ul><li>\u8868\u793a\u544a\u8bc9\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u8bbe\u7f6e\u7f13\u5b58\u591a\u957f\u65f6\u95f4\uff08\u79d2\uff09<\/li><\/ul><\/li><li>s-maxage<ul><li>\u8868\u793a\u544a\u8bc9\u6d4f\u89c8\u5668\u7f13\u5b58\u591a\u957f\u65f6\u95f4\uff08\u79d2\uff09\u4ec5\u5728public\u65f6\u6709\u6548<\/li><\/ul><\/li><\/ul>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u534f\u5546\u7f13\u5b58 \uff08304\uff09<\/h2>\n\n\n\n<p>\u534f\u5546\u7f13\u5b58\u5c31\u662f\u4f7f\u7528\u672c\u5730\u7f13\u5b58\u4e4b\u524d\uff0c\u9700\u8981\u60f3\u670d\u52a1\u7aef\u53d1\u8d77\u4e00\u6b21GET\u8bf7\u6c42\uff0c\u4e0e\u4e4b\u534f\u5546\u5f53\u524d\u6d4f\u89c8\u5668\u4fdd\u5b58\u7684\u672c\u5730\u7f13\u5b58\u662f\u5426\u8fc7\u671f<\/p>\n\n\n\n<p>\u8bf7\u6c42\u5934<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Request URL: htp:\/\/127.0.0.1:3000\/1.jpg\r\nRequest Method:GET\r\n\u200b\r\nlast-modified: Thu,29 Apr 2021:03:0:28MT\r\ncache-control:no-cache<\/code><\/pre>\n\n\n\n<p>\u5f53\u6587\u4ef6\u7b2c\u4e00\u6b21\u8bf7\u6c42\u65f6\u670d\u52a1\u7aef\u4f1a\u8fd4\u56de last-modified \u5b57\u6bb5\uff0c\u8868\u793a\u7f13\u5b58\u7684\u65f6\u95f4\uff1b \u5f53\u7b2c\u4e8c\u6b21\u8bf7\u6c42\u662f\u54cd\u5e94\u5934\u4f1a\u5e26\u4e0a IF-Modified-Since \u5b57\u6bb5 \u548c\u670d\u52a1\u7aef\u65f6\u95f4\u8fdb\u884c\u5bf9\u6bd4\uff0c\u5982\u679c\u4e00\u76f4\u5219\u8bfb\u53d6\u7f13\u5b58\uff0c\u72b6\u6001\u7801\u53d8\u6210304<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">last-modified\u7684\u4e0d\u8db3<\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5982\u679c\u6587\u4ef6\u8fdb\u884c\u4e86\u7f16\u8f91\uff0c\u4f46\u5b9e\u8d28\u4e0a\u6587\u4ef6\u5185\u5bb9\u5e76\u6ca1\u6709\u6539\u53d8\uff0c\u662f\u65f6\u95f4\u6233\u4f1a\u66f4\u65b0\u3002 \u4ece\u800c\u5bfc\u81f4\u7f51\u7edc\u8d44\u6e90\u7684\u6d6a\u8d39\uff0c\u5ef6\u957f\u7528\u6237\u7b49\u5f85\u7684\u65f6\u95f4<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u57fa\u4e8eEtag\u7684\u534f\u5546\u7f13\u5b58<\/h3>\n\n\n\n<p>\u4e3a\u4e86\u5f25\u8865\u901a\u8fc7\u65f6\u95f4\u6233\u5224\u65ad\u7684\u4e0d\u8db3\uff0c\u589e\u52a0\u4e86Etag\u7684\u5934\u4fe1\u606f\uff0c\u53ca\u5b9e\u4f53\u6807\u7b7e<\/p>\n\n\n\n<p>\u5176\u5185\u5bb9\u4e3b\u8981\u662f\u670d\u52a1\u5668\u4e3a\u4e0d\u540c\u8d44\u6e90\u8fdb\u884c\u4e86\u54c8\u5e0c\u8fd0\u7b97\u6240\u751f\u6210\u7684\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u7c7b\u4f3c\u4e8e\u6587\u4ef6\u6307\u7eb9<\/p>\n\n\n\n<p>\u54cd\u5e94\u5934<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Content-Type:image\/jpeg\r\nEtag:\"xxxxxxxxxxxxx\"<\/code><\/pre>\n\n\n\n<p>\u518d\u6b21\u8bf7\u6c42\u5934<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>If-node-match:\"xxxxxxxxxxx\"<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610f\uff1a \u5982\u679c last-modified \u548c Etag \u540c\u65f6\u5b58\u5728\u662f Etag\u7684\u4f18\u5148\u7ea7\u6700\u9ad8<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">ETag\u7684\u4e0d\u8db3<\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5bf9\u6587\u4ef6\u52a0\u5bc6\u8ba1\u7b97\u4f1a\u4ed8\u51fa\u989d\u5916\u7684\u8ba1\u7b97\u5f00\u9500\uff0c\u5982\u679c\u6587\u4ef6\u8fc7\u5927\uff0c\u6570\u91cf\u8fc7\u591a\u4e14\u4fee\u6539\u9891\u7e41\uff0c\u4f1a\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u5f71\u54cd\u670d\u52a1\u5668\u6027\u80fd<\/li><\/ul>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7f13\u5b58\u51b3\u7b56<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/gjweb.top\/wp-content\/uploads\/2021\/06\/16248035461.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"485\" height=\"634\" data-original=\"http:\/\/gjweb.top\/wp-content\/uploads\/2021\/06\/16248035461.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-267\"\/><\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>HTTP\u6362\u5185\u5b58\u5e94\u8be5\u7b97\u662f\u524d\u7aef\u5f00\u53d1\u4e2d\u5e38\u63a5\u89e6\u7684\u7f13\u5b58\u673a\u5236\u4e4b\u4e00,\u4ed6\u53c8\u8bfe\u7ec6\u5206\u4e3a\u5f3a\u5236\u7f13\u5b58\u4e0e\u534f\u5546\u7f13\u5b58,\u4e8c\u8005\u6700\u5927\u7684\u533a\u522b\u5728\u4e8e\u5224\u65ad\u7f13 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-266","post","type-post","status-publish","format-standard","hentry","category-http"],"_links":{"self":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=266"}],"version-history":[{"count":0,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/266\/revisions"}],"wp:attachment":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}