{"id":24930,"date":"2025-04-19T11:11:28","date_gmt":"2025-04-19T03:11:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/24930.html"},"modified":"2025-04-19T11:11:28","modified_gmt":"2025-04-19T03:11:28","slug":"%e4%bb%8e%e5%8d%95%e7%ba%bf%e7%a8%8b%e5%88%b0%e5%a4%9a%e7%ba%bf%e7%a8%8b%ef%bc%9arust-web-%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e6%80%a7%e8%83%bd%e6%8f%90%e5%8d%87%e4%b9%8b%e8%b7%af","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/24930.html","title":{"rendered":"\u4ece\u5355\u7ebf\u7a0b\u5230\u591a\u7ebf\u7a0b\uff1aRust Web \u670d\u52a1\u5668\u7684\u6027\u80fd\u63d0\u5347\u4e4b\u8def"},"content":{"rendered":"<h3>\u4e00\u3001\u95ee\u9898\u63cf\u8ff0&#xff1a;\u5355\u7ebf\u7a0b\u670d\u52a1\u5668\u7684\u5c40\u9650\u6027<\/h3>\n<p>\u5728\u5355\u7ebf\u7a0b\u5b9e\u73b0\u4e2d&#xff0c;\u670d\u52a1\u5668\u5bf9\u6bcf\u4e2a\u8bf7\u6c42\u4f9d\u6b21\u5904\u7406\u3002\u5982\u679c\u6709\u8bf7\u6c42\u9700\u8981\u8f83\u957f\u65f6\u95f4\u624d\u80fd\u54cd\u5e94&#xff08;\u4f8b\u5982\u5904\u7406\u590d\u6742\u7684\u8ba1\u7b97\u6216\u7b49\u5f85\u5916\u90e8\u8d44\u6e90&#xff09;&#xff0c;\u540e\u7eed\u7684\u8bf7\u6c42\u5c31\u4f1a\u88ab\u8feb\u7b49\u5f85\u3002\u4e3a\u4e86\u89e3\u91ca\u8fd9\u4e2a\u95ee\u9898&#xff0c;\u6211\u4eec\u53ef\u4ee5\u6a21\u62df\u4e00\u4e2a\u201c\u6162\u8bf7\u6c42\u201d\u3002<\/p>\n<h4>\u6a21\u62df\u6162\u8bf7\u6c42<\/h4>\n<p>\u5047\u8bbe\u6211\u4eec\u4e3a\u8bf7\u6c42 \/sleep \u8bbe\u8ba1\u4e86\u4e00\u4e2a\u5904\u7406\u5206\u652f&#xff0c;\u670d\u52a1\u5668\u5728\u63a5\u6536\u5230\u8be5\u8bf7\u6c42\u540e\u4f1a\u5ef6\u65f6 5 \u79d2\u518d\u8fd4\u56de\u54cd\u5e94\u3002\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b&#xff08;Listing 21-10&#xff09;&#xff1a;<\/p>\n<p><span class=\"token keyword\">match<\/span> request_line<span class=\"token punctuation\">.<\/span><span class=\"token function\">as_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token string\">&#034;GET \/ HTTP\/1.1&#034;<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* \u6b63\u5e38\u5904\u7406 *\/<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token string\">&#034;GET \/sleep HTTP\/1.1&#034;<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6a21\u62df\u4e00\u4e2a\u957f\u65f6\u95f4\u7684\u8bf7\u6c42<\/span><br \/>\n        <span class=\"token namespace\">thread<span class=\"token punctuation\">::<\/span><\/span><span class=\"token function\">sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Duration<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">from_secs<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u8fd4\u56de\u6b63\u5e38\u9875\u9762<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    _ <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* \u8fd4\u56de 404 *\/<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5f53\u540c\u65f6\u6709\u8bf7\u6c42\u8bbf\u95ee \/sleep \u4e0e\u5176\u4ed6\u5feb\u901f\u54cd\u5e94\u7684\u9875\u9762\u65f6&#xff0c;\u7531\u4e8e\u670d\u52a1\u5668\u662f\u5355\u7ebf\u7a0b\u8fd0\u884c&#xff0c;\u6240\u6709\u8bf7\u6c42\u90fd\u5c06\u7b49\u5f85\u6162\u8bf7\u6c42\u5b8c\u6210\u540e\u624d\u80fd\u5904\u7406\u3002\u8fd9\u5728\u5b9e\u9645\u573a\u666f\u4e2d\u4f1a\u6781\u5927\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<h3>\u4e8c\u3001\u5f15\u5165\u7ebf\u7a0b\u6c60&#xff1a;\u63d0\u5347\u670d\u52a1\u5668\u5e76\u53d1\u5904\u7406\u80fd\u529b<\/h3>\n<p>\u4e3a\u4e86\u89e3\u51b3\u5355\u7ebf\u7a0b\u670d\u52a1\u5668\u7684\u74f6\u9888&#xff0c;\u6211\u4eec\u9700\u8981\u8ba9\u670d\u52a1\u5668\u80fd\u540c\u65f6\u5904\u7406\u591a\u4e2a\u8bf7\u6c42\u3002\u4e00\u4e2a\u5e38\u89c1\u7684\u89e3\u51b3\u65b9\u6848\u662f\u4f7f\u7528\u7ebf\u7a0b\u6c60\u3002\u7ebf\u7a0b\u6c60\u662f\u4e00\u7ec4\u9884\u5148\u521b\u5efa\u597d\u7684\u5de5\u4f5c\u7ebf\u7a0b&#xff0c;\u5b83\u4eec\u5728\u7b49\u5f85\u4efb\u52a1\u5230\u6765&#xff0c;\u4e00\u65e6\u6709\u65b0\u4efb\u52a1&#xff0c;\u5c31\u80fd\u4ece\u7ebf\u7a0b\u6c60\u4e2d\u9009\u53d6\u4e00\u4e2a\u7a7a\u95f2\u7ebf\u7a0b\u53bb\u6267\u884c\u4efb\u52a1\u3002\u8fd9\u6837&#xff0c;\u5373\u4f7f\u67d0\u4e2a\u8bf7\u6c42\u9700\u8981\u957f\u65f6\u95f4\u5904\u7406&#xff0c;\u5176\u4ed6\u7ebf\u7a0b\u4f9d\u7136\u53ef\u4ee5\u5904\u7406\u5176\u4ed6\u8bf7\u6c42\u3002<\/p>\n<h4>\u4e3a\u4ec0\u4e48\u4f7f\u7528\u7ebf\u7a0b\u6c60&#xff1f;<\/h4>\n<ul>\n<li>\u8d44\u6e90\u9650\u5236&#xff1a;\u5982\u679c\u6bcf\u4e2a\u8bf7\u6c42\u90fd\u521b\u5efa\u4e00\u4e2a\u65b0\u7ebf\u7a0b&#xff0c;\u6781\u7aef\u60c5\u51b5\u4e0b\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u8d44\u6e90\u8017\u5c3d\u3002\u7ebf\u7a0b\u6c60\u53ef\u4ee5\u901a\u8fc7\u9884\u8bbe\u7ebf\u7a0b\u6570\u91cf\u6765\u9650\u5236\u5e76\u53d1\u6570\u91cf&#xff0c;\u4ece\u800c\u9632\u6b62\u62d2\u7edd\u670d\u52a1&#xff08;DoS&#xff09;\u653b\u51fb\u3002<\/li>\n<li>\u63d0\u9ad8\u541e\u5410\u91cf&#xff1a;\u56fa\u5b9a\u6570\u91cf\u7684\u7ebf\u7a0b\u80fd\u591f\u540c\u65f6\u5904\u7406\u591a\u4e2a\u8bf7\u6c42&#xff0c;\u7f13\u89e3\u957f\u65f6\u95f4\u5904\u7406\u8bf7\u6c42\u5e26\u6765\u7684\u963b\u585e\u95ee\u9898\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u3001\u8bbe\u8ba1\u7ebf\u7a0b\u6c60\u63a5\u53e3<\/h3>\n<p>\u5728\u8bbe\u8ba1\u7ebf\u7a0b\u6c60\u65f6&#xff0c;\u6211\u4eec\u5e0c\u671b\u5b83\u7684\u4f7f\u7528\u65b9\u5f0f\u4e0e thread::spawn \u7c7b\u4f3c&#xff0c;\u8fd9\u6837\u5bf9\u8c03\u7528\u8005\u6765\u8bf4\u4e0d\u9700\u8981\u592a\u591a\u6539\u52a8\u3002\u6211\u4eec\u7684\u76ee\u6807\u63a5\u53e3\u5982\u4e0b&#xff08;Listing 21-12&#xff09;&#xff1a;<\/p>\n<p><span class=\"token keyword\">let<\/span> pool <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">ThreadPool<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">for<\/span> stream <span class=\"token keyword\">in<\/span> listener<span class=\"token punctuation\">.<\/span><span class=\"token function\">incoming<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    pool<span class=\"token punctuation\">.<\/span><span class=\"token function\">execute<\/span><span class=\"token punctuation\">(<\/span><span class=\"token closure-params\"><span class=\"token closure-punctuation punctuation\">|<\/span><span class=\"token closure-punctuation punctuation\">|<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">handle_connection<\/span><span class=\"token punctuation\">(<\/span>stream<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u4e2a\u63a5\u53e3\u7b80\u5355\u76f4\u89c2&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528 ThreadPool::new \u521b\u5efa\u4e00\u4e2a\u6307\u5b9a\u6570\u91cf\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6c60\u3002<\/li>\n<li>\u4f7f\u7528 pool.execute \u5c06\u9700\u8981\u5904\u7406\u7684\u8bf7\u6c42&#xff08;\u4ee5\u95ed\u5305\u5f62\u5f0f&#xff09;\u63d0\u4ea4\u7ed9\u7ebf\u7a0b\u6c60\u6267\u884c\u3002<\/li>\n<\/ul>\n<h3>\u56db\u3001\u57fa\u4e8e\u7f16\u8bd1\u5668\u9a71\u52a8\u5f00\u53d1\u5b9e\u73b0\u7ebf\u7a0b\u6c60<\/h3>\n<p>Rust \u7f16\u8bd1\u5668\u7684\u4e25\u683c\u7c7b\u578b\u68c0\u67e5\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u4e00\u6b65\u6b65\u5b8c\u5584\u8bbe\u8ba1\u3002\u6211\u4eec\u4ece\u521b\u5efa\u4e00\u4e2a\u7a7a\u7684 ThreadPool \u7ed3\u6784\u4f53\u5f00\u59cb&#xff0c;\u518d\u6839\u636e\u7f16\u8bd1\u5668\u53cd\u9988\u9010\u6b65\u6dfb\u52a0\u5fc5\u8981\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\u3002<\/p>\n<h4>1. \u5b9a\u4e49 ThreadPool \u7ed3\u6784\u4f53<\/h4>\n<p>\u9996\u5148\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u6700\u7b80\u5355\u7684 ThreadPool&#xff0c;\u8fd9\u91cc\u6211\u4eec\u5148\u5c06\u9879\u76ee\u7531\u4e8c\u8fdb\u5236 crate \u8f6c\u6362\u4e3a\u5e93 crate&#xff0c;\u5c06\u7ebf\u7a0b\u6c60\u5b9e\u73b0\u653e\u5728 src\/lib.rs \u4e2d&#xff08;Listing 21-14 \u524d\u671f\u793a\u4f8b&#xff09;&#xff1a;<\/p>\n<p><span class=\"token keyword\">pub<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token type-definition class-name\">ThreadPool<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    workers<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Vec<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token class-name\">Worker<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    sender<span class=\"token punctuation\">:<\/span> <span class=\"token namespace\">mpsc<span class=\"token punctuation\">::<\/span><\/span><span class=\"token class-name\">Sender<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token class-name\">Job<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2. \u5b9e\u73b0 new \u65b9\u6cd5<\/h4>\n<p>\u6211\u4eec\u9700\u8981\u786e\u4fdd\u4f20\u5165\u7684\u7ebf\u7a0b\u6570\u5927\u4e8e 0&#xff0c;\u5426\u5219\u7a0b\u5e8f\u5e94\u8be5 panic&#xff08;\u89c1 Listing 21-13&#xff09;&#xff1a;<\/p>\n<p><span class=\"token keyword\">impl<\/span> <span class=\"token class-name\">ThreadPool<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\/ \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b\u6c60\u3002<\/span><br \/>\n    <span class=\"token comment\">\/\/\/<\/span><br \/>\n    <span class=\"token comment\">\/\/\/ # Panics<\/span><br \/>\n    <span class=\"token comment\">\/\/\/<\/span><br \/>\n    <span class=\"token comment\">\/\/\/ \u5982\u679c\u4f20\u5165\u7684 &#096;size&#096; \u4e3a 0&#xff0c;\u7ebf\u7a0b\u6c60\u4f1a panic\u3002<\/span><br \/>\n    <span class=\"token keyword\">pub<\/span> <span class=\"token keyword\">fn<\/span> <span class=\"token function-definition function\">new<\/span><span class=\"token punctuation\">(<\/span>size<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">usize<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">-&gt;<\/span> <span class=\"token class-name\">ThreadPool<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token macro property\">assert!<\/span><span class=\"token punctuation\">(<\/span>size <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u521b\u5efa\u4e00\u4e2a\u901a\u9053&#xff0c;\u7528\u4e8e\u5728\u7ebf\u7a0b\u95f4\u4f20\u9012\u4efb\u52a1<\/span><br \/>\n        <span class=\"token keyword\">let<\/span> <span class=\"token punctuation\">(<\/span>sender<span class=\"token punctuation\">,<\/span> receiver<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token namespace\">mpsc<span class=\"token punctuation\">::<\/span><\/span><span class=\"token function\">channel<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u4f7f\u7528 Arc \u548c Mutex \u5171\u4eab receiver \u7ed9\u6bcf\u4e2a Worker<\/span><br \/>\n        <span class=\"token keyword\">let<\/span> receiver <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Arc<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Mutex<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span>receiver<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">let<\/span> <span class=\"token keyword\">mut<\/span> workers <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Vec<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">with_capacity<\/span><span class=\"token punctuation\">(<\/span>size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u6839\u636e size \u521b\u5efa\u76f8\u5e94\u6570\u91cf\u7684 Worker<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> id <span class=\"token keyword\">in<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">..<\/span>size <span class=\"token punctuation\">{<\/span><br \/>\n            workers<span class=\"token punctuation\">.<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Worker<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Arc<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">clone<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>receiver<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token class-name\">ThreadPool<\/span> <span class=\"token punctuation\">{<\/span> workers<span class=\"token punctuation\">,<\/span> sender <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>3. \u5b9a\u4e49 execute \u65b9\u6cd5<\/h4>\n<p>execute \u65b9\u6cd5\u63a5\u6536\u4e00\u4e2a\u5b9e\u73b0 FnOnce() &#043; Send &#043; &#039;static \u7684\u95ed\u5305&#xff0c;\u5c06\u5176\u5c01\u88c5\u4e3a Job \u540e\u53d1\u9001\u7ed9\u7ebf\u7a0b\u6c60&#xff08;\u89c1 Listing 21-19&#xff09;&#xff1a;<\/p>\n<p><span class=\"token keyword\">type<\/span> <span class=\"token type-definition class-name\">Job<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Box<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">dyn<\/span> <span class=\"token class-name\">FnOnce<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token class-name\">Send<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token lifetime-annotation symbol\">&#039;static<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">impl<\/span> <span class=\"token class-name\">ThreadPool<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">pub<\/span> <span class=\"token keyword\">fn<\/span> <span class=\"token function-definition function\">execute<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token class-name\">F<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span><span class=\"token keyword\">self<\/span><span class=\"token punctuation\">,<\/span> f<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">F<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">where<\/span><br \/>\n        <span class=\"token class-name\">F<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">FnOnce<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token class-name\">Send<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token lifetime-annotation symbol\">&#039;static<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">let<\/span> job <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Box<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span>f<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">self<\/span><span class=\"token punctuation\">.<\/span>sender<span class=\"token punctuation\">.<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>job<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">unwrap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>4. \u6784\u5efa Worker \u7ed3\u6784\u4f53<\/h4>\n<p>Worker \u7ed3\u6784\u4f53\u5c01\u88c5\u4e86\u5b9e\u9645\u7684\u7ebf\u7a0b&#xff0c;\u6bcf\u4e2a Worker \u5728\u521b\u5efa\u65f6\u90fd\u4f1a\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b&#xff0c;\u5e76\u6301\u7eed\u7b49\u5f85\u63a5\u6536\u4efb\u52a1\u6267\u884c\u3002Worker \u7684\u5b9e\u73b0&#xff08;Listing 21-15 \u548c Listing 21-20&#xff09;\u5982\u4e0b&#xff1a;<\/p>\n<p><span class=\"token keyword\">use<\/span> <span class=\"token namespace\">std<span class=\"token punctuation\">::<\/span><\/span>thread<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">use<\/span> <span class=\"token namespace\">std<span class=\"token punctuation\">::<\/span>sync<span class=\"token punctuation\">::<\/span><\/span><span class=\"token punctuation\">{<\/span><span class=\"token class-name\">Arc<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Mutex<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">use<\/span> <span class=\"token namespace\">std<span class=\"token punctuation\">::<\/span>sync<span class=\"token punctuation\">::<\/span><\/span>mpsc<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token type-definition class-name\">Worker<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    id<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">usize<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    thread<span class=\"token punctuation\">:<\/span> <span class=\"token namespace\">thread<span class=\"token punctuation\">::<\/span><\/span><span class=\"token class-name\">JoinHandle<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">impl<\/span> <span class=\"token class-name\">Worker<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">fn<\/span> <span class=\"token function-definition function\">new<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">:<\/span> <span class=\"token keyword\">usize<\/span><span class=\"token punctuation\">,<\/span> receiver<span class=\"token punctuation\">:<\/span> <span class=\"token class-name\">Arc<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token class-name\">Mutex<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token namespace\">mpsc<span class=\"token punctuation\">::<\/span><\/span><span class=\"token class-name\">Receiver<\/span><span class=\"token operator\">&lt;<\/span><span class=\"token class-name\">Job<\/span><span class=\"token operator\">&gt;&gt;<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">-&gt;<\/span> <span class=\"token class-name\">Worker<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">let<\/span> thread <span class=\"token operator\">&#061;<\/span> <span class=\"token namespace\">thread<span class=\"token punctuation\">::<\/span><\/span><span class=\"token function\">spawn<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">move<\/span> <span class=\"token closure-params\"><span class=\"token closure-punctuation punctuation\">|<\/span><span class=\"token closure-punctuation punctuation\">|<\/span><\/span> <span class=\"token keyword\">loop<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u7b49\u5f85\u4ece channel \u4e2d\u63a5\u6536\u4efb\u52a1<\/span><br \/>\n            <span class=\"token keyword\">let<\/span> job <span class=\"token operator\">&#061;<\/span> receiver<span class=\"token punctuation\">.<\/span><span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">unwrap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">recv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">unwrap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token macro property\">println!<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Worker {} got a job; executing.&#034;<\/span><span class=\"token punctuation\">,<\/span> id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">job<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Worker<\/span> <span class=\"token punctuation\">{<\/span> id<span class=\"token punctuation\">,<\/span> thread <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728\u6bcf\u4e2a\u7ebf\u7a0b\u4e2d&#xff0c;\u6211\u4eec\u4f7f\u7528 receiver.lock().unwrap().recv().unwrap() \u540c\u6b65\u5730\u7b49\u5f85\u4efb\u52a1\u5230\u6765\u3002\u4f7f\u7528 Arc&lt;Mutex&lt;_&gt;&gt; \u4fdd\u8bc1\u591a\u4e2a Worker \u80fd\u5b89\u5168\u5171\u4eab\u540c\u4e00\u4e2a\u63a5\u6536\u7aef\u3002<\/p>\n<h3>\u4e94\u3001\u6574\u5408\u591a\u7ebf\u7a0b\u670d\u52a1\u5668<\/h3>\n<p>\u5c06\u7ebf\u7a0b\u6c60\u6574\u5408\u5230\u670d\u52a1\u5668\u4ee3\u7801\u4e2d\u540e&#xff0c;\u670d\u52a1\u5668\u7684 main \u51fd\u6570\u4f1a\u53d8\u5f97\u7c7b\u4f3c\u4e0b\u9762\u8fd9\u6837&#xff1a;<\/p>\n<p><span class=\"token keyword\">fn<\/span> <span class=\"token function-definition function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">let<\/span> listener <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">TcpListener<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">bind<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;127.0.0.1:7878&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">unwrap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">let<\/span> pool <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">ThreadPool<\/span><span class=\"token punctuation\">::<\/span><span class=\"token function\">new<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u56fa\u5b9a 4 \u4e2a\u5de5\u4f5c\u7ebf\u7a0b<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> stream <span class=\"token keyword\">in<\/span> listener<span class=\"token punctuation\">.<\/span><span class=\"token function\">incoming<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">let<\/span> stream <span class=\"token operator\">&#061;<\/span> stream<span class=\"token punctuation\">.<\/span><span class=\"token function\">unwrap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        pool<span class=\"token punctuation\">.<\/span><span class=\"token function\">execute<\/span><span class=\"token punctuation\">(<\/span><span class=\"token closure-params\"><span class=\"token closure-punctuation punctuation\">|<\/span><span class=\"token closure-punctuation punctuation\">|<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">handle_connection<\/span><span class=\"token punctuation\">(<\/span>stream<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u6837\u4e00\u6765&#xff0c;\u65e0\u8bba\u662f\u5feb\u901f\u54cd\u5e94\u8bf7\u6c42&#xff08;\u4f8b\u5982 \/&#xff09;\u8fd8\u662f\u6a21\u62df\u957f\u65f6\u95f4\u54cd\u5e94\u7684\u8bf7\u6c42&#xff08;\u4f8b\u5982 \/sleep&#xff09;&#xff0c;\u670d\u52a1\u5668\u90fd\u80fd\u540c\u65f6\u5904\u7406\u591a\u4e2a\u8bf7\u6c42&#xff0c;\u4e92\u4e0d\u963b\u585e\u3002<\/p>\n<h3>\u516d\u3001\u603b\u7ed3\u4e0e\u5c55\u671b<\/h3>\n<p>\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u5982\u4f55\u5c06\u5355\u7ebf\u7a0b Web \u670d\u52a1\u5668\u5347\u7ea7\u4e3a\u591a\u7ebf\u7a0b\u670d\u52a1\u5668&#xff0c;\u6838\u5fc3\u601d\u60f3\u662f\u5f15\u5165\u7ebf\u7a0b\u6c60\u6765\u9650\u5236\u5e76\u53d1\u7ebf\u7a0b\u6570\u91cf&#xff0c;\u540c\u65f6\u5229\u7528 Rust \u5f3a\u7c7b\u578b\u7cfb\u7edf\u548c\u7f16\u8bd1\u5668\u53cd\u9988\u4e00\u6b65\u6b65\u5b8c\u5584\u5b9e\u73b0\u3002\u4e3b\u8981\u5185\u5bb9\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u95ee\u9898\u5206\u6790&#xff1a;\u5355\u7ebf\u7a0b\u670d\u52a1\u5668\u5728\u9047\u5230\u8017\u65f6\u64cd\u4f5c\u65f6\u4f1a\u963b\u585e\u540e\u7eed\u8bf7\u6c42\u3002<\/li>\n<li>\u6a21\u62df\u6162\u8bf7\u6c42&#xff1a;\u901a\u8fc7 \/sleep \u8bf7\u6c42\u6a21\u62df\u957f\u65f6\u95f4\u5904\u7406\u573a\u666f&#xff0c;\u9a8c\u8bc1\u5355\u7ebf\u7a0b\u95ee\u9898\u3002<\/li>\n<li>\u7ebf\u7a0b\u6c60\u8bbe\u8ba1&#xff1a;\u8bbe\u8ba1\u51fa\u7c7b\u4f3c ThreadPool::new \u548c pool.execute \u7684 API&#xff0c;\u4f7f\u63a5\u53e3\u4e0e thread::spawn \u4fdd\u6301\u4e00\u81f4\u3002<\/li>\n<li>\u5b9e\u73b0\u7ec6\u8282&#xff1a;\u5229\u7528 Rust \u7684 mpsc \u901a\u9053\u3001Arc \u548c Mutex \u6765\u5728\u7ebf\u7a0b\u95f4\u5b89\u5168\u4f20\u9012\u4efb\u52a1&#xff1b;\u8bbe\u8ba1 Worker \u7ed3\u6784\u4f53\u6765\u7ba1\u7406\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u751f\u547d\u5468\u671f\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb829\u6b21\uff0c\u70b9\u8d5e5\u6b21\uff0c\u6536\u85cf6\u6b21\u3002\u5728\u524d\u9762\u7684\u535a\u5ba2\u4e2d\uff0c\u6211\u4eec\u5df2\u7ecf\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u5355\u7ebf\u7a0b Web \u670d\u52a1\u5668\uff0c\u8be5\u670d\u52a1\u5668\u80fd\u591f\u63a5\u6536 TCP \u8fde\u63a5\u3001\u89e3\u6790 HTTP \u8bf7\u6c42\uff0c\u5e76\u6839\u636e\u8bf7\u6c42\u8fd4\u56de\u76f8\u5e94\u7684 HTML \u9875\u9762\u3002\u867d\u7136\u8fd9\u4e2a\u670d\u52a1\u5668\u80fd\u6ee1\u8db3\u57fa\u672c\u9700\u6c42\uff0c\u4f46\u5b83\u5b58\u5728\u4e00\u4e2a\u4e25\u91cd\u7684\u95ee\u9898\uff1a\u6240\u6709\u8bf7\u6c42\u90fd\u662f\u4e32\u884c\u5904\u7406\u7684\u3002\u8fd9\u610f\u5473\u7740\u5982\u679c\u6709\u4e00\u4e2a\u8bf7\u6c42\u5904\u7406\u5f97\u7279\u522b\u6162\uff0c\u5176\u4ed6\u8bf7\u6c42\u5c31\u53ea\u80fd\u5728\u5176\u5b8c\u6210\u540e\u624d\u80fd\u88ab\u5904\u7406\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5229\u7528\u7ebf\u7a0b\u6c60\u5c06\u5355\u7ebf\u7a0b\u670d\u52a1\u5668\u5347\u7ea7\u4e3a\u591a\u7ebf\u7a0b\u670d\u52a1\u5668\uff0c\u4ece\u800c\u63d0\u5347\u670d\u52a1\u5668\u7684\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[206,87,190,43],"topic":[],"class_list":["post-24930","post","type-post","status-publish","format-standard","hentry","category-server","tag-rust","tag-87","tag-190","tag-43"],"yoast_head":"<!-- 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