{"id":207914,"date":"2025-07-08T14:27:18","date_gmt":"2025-07-08T06:27:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207914\/"},"modified":"2025-07-08T14:27:18","modified_gmt":"2025-07-08T06:27:18","slug":"%e6%9d%a5%e8%87%aa-head-%e8%af%b7%e6%b1%82%e7%9a%84%e8%be%93%e5%87%ba%e5%86%85%e5%ae%b9%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207914\/","title":{"rendered":"\u6765\u81ea HEAD \u8bf7\u6c42\u7684\u8f93\u51fa\u5185\u5bb9\u7c7b\u578b"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u6765\u81ea HEAD \u8bf7\u6c42\u7684\u8f93\u51fa\u5185\u5bb9\u7c7b\u578b<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-26 18:54:36<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u6765\u81ea HEAD \u8bf7\u6c42\u7684\u8f93\u51fa\u5185\u5bb9\u7c7b\u578b\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\uff0c\u6216\u8005\u662f\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u6b63\u5728\u53d1\u51fa\u4e00\u4e2a\u7b80\u5355\u7684 head \u8bf7\u6c42\uff0c\u6211\u60f3\u67e5\u770b\u8fd4\u56de\u7684 content-type \u662f\u5426\u5305\u542b zip \u6587\u4ef6\u3002<\/p>\n<p>\u6211\u77e5\u9053\u4f60\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\uff1a<\/p>\n<pre>res, err := http.head(url)\n  if err != nil {\n    fmt.printf(\"%s\\n\", err)\n    return false\n  }\n  contentlength:=res.contentlength\n  fmt.printf(\"contentlength:%v\\n\", contentlength)<\/pre>\n<p>\u4f46\u662f <code>content-type<\/code> \u6709\u4ec0\u4e48\u65b9\u6cd5\u53ef\u4ee5\u8bbf\u95ee\u5b83\u5417\uff1f\u6211\u60f3\u5230\u4e86\u4e24\u4e2a\u60f3\u6cd5\uff1a<\/p>\n<pre>contenttype:=res.contenttype<\/pre>\n<p>\u4f46\u8fd9\u5e76\u4e0d\u5b58\u5728\uff1a<\/p>\n<p> res.contenttype \u672a\u5b9a\u4e49\uff08\u7c7b\u578b *http.response \u6ca1\u6709\u5b57\u6bb5\u6216\u65b9\u6cd5 contenttype\uff09 <\/p>\n<p>\u90a3\u4e48\u5c1d\u8bd5\u89e3\u6790\u201cres\u201d\u7684\u5168\u90e8\u5185\u5bb9\u600e\u4e48\u6837\uff0c\u8fd9\u6837\u6211\u5c31\u53ef\u4ee5\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u201czip\u201d\uff1a<\/p>\n<pre>bs := string(res)\n  fmt.Printf(\"%s\\n\", bs)<\/pre>\n<p> \u65e0\u6cd5\u5c06 res\uff08\u7c7b\u578b *http.response\uff09\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578b <\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u60a8\u5e94\u8be5\u68c0\u67e5\u6807\u5934\u7684\u5185\u5bb9<\/p>\n<pre>contentType := res.Header.Get(\"Content-Type\")\n<\/pre>\n<p>\u53c2\u89c1 \u548c <\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u6765\u81ea HEAD \u8bf7\u6c42\u7684\u8f93\u51fa\u5185\u5bb9\u7c7b\u578b\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207914","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207914","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=207914"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207914\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207914"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207914"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}