{"id":207847,"date":"2025-07-08T15:06:11","date_gmt":"2025-07-08T07:06:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207847\/"},"modified":"2025-07-08T15:06:11","modified_gmt":"2025-07-08T07:06:11","slug":"io-readcloser-%e7%9a%84%e7%94%a8%e9%80%94","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207847\/","title":{"rendered":"io.ReadCloser \u7684\u7528\u9014"},"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>io.ReadCloser \u7684\u7528\u9014<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-26 08:18:32<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aio.ReadCloser \u7684\u7528\u9014\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9&#8230;\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6709\u4eba\u53ef\u4ee5\u89e3\u91ca\uff08\u6216\/\u548c\u5206\u4eab\u793a\u4f8b\uff09\u4f55\u65f6\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u5e94\u8be5\u663e\u5f0f\u5173\u95ed\u8bfb\u8005\uff0c\u5373\u5b9e\u73b0 io.ReadCloser\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f io.Reader\u3002<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u4f8b\u5982\uff0c\u5f53\u60a8\u6b63\u5728\u5904\u7406\u6587\u4ef6\u6216\u4efb\u4f55\u5e94\u5173\u95ed\u4ee5\u91ca\u653e\u5206\u914d\u7684\u8d44\u6e90\uff08\u6216\u8d44\u6e90\u7684\u5185\u5b58\uff0c\u4f8b\u5982\u4ece <code>go<\/code> \u8c03\u7528\u7684 <code>c<\/code> \u4ee3\u7801\uff09\u65f6\u3002<br \/> \u5f53\u60a8\u6709 <code>read<\/code> \u548c <code>clos\u200b\u200be<\/code> \u65b9\u6cd5\u65f6\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5b83\uff0c\u8fd9\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u8bf4\u660e\u60a8\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u901a\u7528\u51fd\u6570\u6765\u4f7f\u7528 <code>io.readcloser<\/code> \u6765\u5904\u7406\u4e0d\u540c\u7c7b\u578b\uff1a<\/p>\n<pre>package main\n\nimport (\n    \"fmt\"\n    \"io\"\n    \"log\"\n    \"os\"\n)\n\nfunc main() {\n    f, err := os.open(\".\/main.go\")\n    if err != nil {\n        log.fatal(err)\n    }\n    doit(f)\n    doit(os.stdin)\n}\nfunc doit(rc io.readcloser) {\n    defer rc.close()\n    buf := make([]byte, 4)\n    n, err := rc.read(buf)\n    if err != nil {\n        log.fatal(err)\n    }\n    fmt.printf(\"%s\\n\", buf[:n])\n}<\/pre>\n<p>\u8fd0\u884c\u5e76\u8f93\u5165 <code>12345<\/code> \u4f5c\u4e3a\u8f93\u5165\uff0c\u8f93\u51fa\uff1a<\/p>\n<pre>pack\n12345\n1234<\/pre>\n<p>\u53e6\u8bf7\u53c2\u9605\uff1a<\/p>\n<p>\u7528\u4e8e\u660e\u786e\u5b9a\u4e49reader\u548ccloser\u63a5\u53e3\u3002\u5047\u8bbe\u60a8\u7f16\u5199\u4e86\u4e00\u4e9b\u8bfb\u53d6\u6570\u636e\u7684\u529f\u80fd\uff0c\u4f46\u60a8\u8fd8\u60f3\u5728\u5b8c\u6210\u540e\u5173\u95ed\u8d44\u6e90\uff08\u540c\u6837\u4e0d\u8981\u6cc4\u6f0f\u63cf\u8ff0\u7b26\uff09\u3002<\/p>\n<pre>func ...(r io.ReaderCloser) {\n    defer r.Close()\n    ... \/\/ some reading\n}<\/pre>\n<p>\u60a8\u4f20\u5165\u7684\u4efb\u4f55\u5185\u5bb9\u90fd\u9700\u8981\u5b9a\u4e49\u4e24\u4e2a\u63a5\u53e3\uff0c\u662f os.file \u8fd8\u662f\u4efb\u4f55\u81ea\u5b9a\u4e49\u7ed3\u6784\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u5c06\u5f3a\u5236 api \u7684\u5ba2\u6237\u7aef\u5b9a\u4e49 <code>read<\/code> \u548c <code>clos\u200b\u200be<\/code> \u63a5\u53e3\u5b9e\u73b0\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f io.reader .<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aio.ReadCloser \u7684\u7528\u9014\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03Golang\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\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-207847","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207847","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=207847"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207847\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}