{"id":45288,"date":"2023-03-08T23:42:05","date_gmt":"2023-04-15T17:55:03","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45288-2\/"},"modified":"2024-04-29T17:58:44","modified_gmt":"2024-04-29T09:58:44","slug":"45288-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45288-2\/","title":{"rendered":""},"content":{"rendered":"<h2>\u74b0\u5883<\/h2>\n<p>rustc 1.32.0 (9fda7c223 2019-01-16)<br \/>\nNode.js 10.15.1<\/p>\n<h2>Rust \u304b\u3089 Node.js \u306b Callback \u3057\u305f\u3044<\/h2>\n<p>\u3068\u3044\u3046\u308f\u3051\u3067\u3001Cargo.toml \u3067\u3059\u3002cdylib\u3063\u3066\u3084\u308b\u3068\u52d5\u7684\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u3067\u304d\u307e\u3059\u3002Windows \u3067\u306f dll \u3063\u3066\u3084\u3064\u3067\u3059\u306d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nn\">[package]<\/span>\r\n<span class=\"py\">name<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"callback\"<\/span>\r\n<span class=\"py\">version<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.1.0\"<\/span>\r\n<span class=\"py\">authors<\/span> <span class=\"p\">=<\/span> <span class=\"nn\">[\"benki\"]<\/span>\r\n<span class=\"py\">edition<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"2018\"<\/span>\r\n\r\n<span class=\"nn\">[dependencies]<\/span>\r\n\r\n<span class=\"nn\">[lib]<\/span>\r\n<span class=\"py\">name<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"callback\"<\/span>\r\n<span class=\"py\">crate-type<\/span> <span class=\"p\">=<\/span> <span class=\"nn\">[\"cdylib\"]<\/span>\r\n<\/code><\/pre>\n<p>\u7d9a\u3044\u3066\u3001lib.rs \u3067\u3059\u3002rust_func\u3063\u3066\u3044\u3046\u95a2\u6570\u306f\u7b2c\u4e00\u5f15\u6570\u306b C \u306e\u6587\u5b57\u5217\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3001\u7b2c\u4e8c\u5f15\u6570\u306b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3092\u53d7\u3051\u53d6\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u307e\u3059\u3002<\/p>\n<p>rust_func\u95a2\u6570\u306e1\u884c\u76ee\u3067 Node.js \u306e\u4e16\u754c\u304b\u3089\u3084\u3063\u3066\u304d\u305f C \u6587\u5b57\u5217\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3092 Rust \u306e\u4e16\u754c\u306e\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u3066\u30012\u884c\u76ee\u3067dbg!\u30de\u30af\u30ed\u3067\u305d\u306e\u5185\u5bb9\u3092\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u5f8c\u306e\u51e6\u7406\u306f\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u3042\u308b\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\u3092\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u5f15\u6570\u306b\u6e21\u3057\u3066\u3044\u307e\u3059\u3002Rust \u306e\u4e16\u754c\u306e\u6587\u5b57\u5217\u306f NULL \u7d42\u7aef\u6587\u5b57\u304c\u306a\u3044\u306e\u3067\u3001\u305d\u306e\u307e\u307e Node.js \u306e\u4e16\u754c\u306b\u6e21\u3059\u3068\u7d50\u679c\u304c\u304a\u304b\u3057\u306a\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u306a\u306e\u3067\u3001path.push(&#8216;\\0&#8217;);\u3067 NULL \u7d42\u7aef\u6587\u5b57\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\uff08\u3082\u3046\u3061\u3087\u3063\u3068\u3046\u307e\u3044\u3053\u3068\u3067\u304d\u308b\u65b9\u6cd5\u304c\u3042\u3063\u305f\u3089\u6559\u3048\u3066\u304f\u3060\u3055\u3044\uff09\u306a\u306e\u3067\u3001std::ffi::CString\u3067 C \u306e\u4e16\u754c\u306e\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u3066\u307e\u3059\u3002\uff08tatsuya6502\u3055\u3093\u306b\u30b3\u30e1\u30f3\u30c8\u3067\u6559\u3048\u3066\u3082\u3089\u3044\u307e\u3057\u305f\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">fs<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">os<\/span><span class=\"p\">::<\/span><span class=\"nn\">raw<\/span><span class=\"p\">::<\/span><span class=\"nb\">c_char<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">ffi<\/span><span class=\"p\">::{<\/span><span class=\"n\">CStr<\/span><span class=\"p\">,<\/span> <span class=\"n\">CString<\/span><span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">type<\/span> <span class=\"n\">CallBack<\/span> <span class=\"o\">=<\/span> <span class=\"k\">fn<\/span><span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"nd\">#[no_mangle]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">rust_func<\/span><span class=\"p\">(<\/span><span class=\"n\">string<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">,<\/span> <span class=\"n\">cb<\/span><span class=\"p\">:<\/span> <span class=\"n\">CallBack<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">str_from_node<\/span> <span class=\"o\">=<\/span> <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span> <span class=\"nn\">CStr<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_ptr<\/span><span class=\"p\">(<\/span><span class=\"n\">string<\/span><span class=\"p\">)<\/span><span class=\"nf\">.to_str<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">()<\/span> <span class=\"p\">};<\/span>\r\n    <span class=\"nd\">dbg!<\/span><span class=\"p\">(<\/span><span class=\"n\">str_from_node<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"nn\">fs<\/span><span class=\"p\">::<\/span><span class=\"nf\">read_dir<\/span><span class=\"p\">(<\/span><span class=\"s\">\".\"<\/span><span class=\"p\">)<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"nf\">.for_each<\/span><span class=\"p\">(|<\/span><span class=\"n\">r<\/span><span class=\"p\">|<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">if<\/span> <span class=\"k\">let<\/span> <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">r<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">r<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"c\">\/\/ let mut path = r.path().to_string_lossy().to_owned().to_string();<\/span>\r\n                <span class=\"c\">\/\/ path.push('\\0');<\/span>\r\n                <span class=\"c\">\/\/ cb(path.as_ptr() as *const c_char);<\/span>\r\n                <span class=\"k\">if<\/span> <span class=\"k\">let<\/span> <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">path<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">CString<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">r<\/span><span class=\"nf\">.path<\/span><span class=\"p\">()<\/span><span class=\"nf\">.to_string_lossy<\/span><span class=\"p\">()<\/span><span class=\"nf\">.as_bytes<\/span><span class=\"p\">())<\/span> <span class=\"p\">{<\/span>\r\n                    <span class=\"nf\">cb<\/span><span class=\"p\">(<\/span><span class=\"n\">path<\/span><span class=\"nf\">.as_ptr<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">c_char<\/span><span class=\"p\">);<\/span>\r\n                <span class=\"p\">}<\/span>\r\n            <span class=\"p\">}<\/span>\r\n        <span class=\"p\">});<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6700\u5f8c\u306b Node.js \u5074\u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">let<\/span> <span class=\"nx\">ffi<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">ffi<\/span><span class=\"dl\">\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">util<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">require<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">util<\/span><span class=\"dl\">\"<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">lib<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">ffi<\/span><span class=\"p\">.<\/span><span class=\"nx\">Library<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">&lt;path to callback.dll or so&gt;<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"p\">{<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">rust_func<\/span><span class=\"dl\">\"<\/span><span class=\"p\">:<\/span> <span class=\"c1\">\/\/ Rust \u306e\u4e16\u754c\u306e\u95a2\u6570\u306e\u540d\u524d<\/span>\r\n        <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">void<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"c1\">\/\/ \u623b\u308a\u5024<\/span>\r\n            <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">string<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"c1\">\/\/ \u7b2c\u4e00\u5f15\u6570<\/span>\r\n            <span class=\"dl\">\"<\/span><span class=\"s2\">pointer<\/span><span class=\"dl\">\"<\/span><span class=\"p\">]<\/span> <span class=\"c1\">\/\/ \u7b2c\u4e8c\u5f15\u6570\uff08\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3078\u306e\u30dd\u30a4\u30f3\u30bf\uff09<\/span>\r\n        <span class=\"p\">]<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">);<\/span>\r\n\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">callback<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">ffi<\/span><span class=\"p\">.<\/span><span class=\"nx\">Callback<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">void<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">string<\/span><span class=\"dl\">\"<\/span><span class=\"p\">],<\/span> <span class=\"p\">(<\/span><span class=\"nx\">path<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">path<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">});<\/span>\r\n\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">rust_func<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">util<\/span><span class=\"p\">.<\/span><span class=\"nx\">promisify<\/span><span class=\"p\">(<\/span><span class=\"nx\">lib<\/span><span class=\"p\">.<\/span><span class=\"nx\">rust_func<\/span><span class=\"p\">.<\/span><span class=\"k\">async<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"p\">(<\/span><span class=\"k\">async<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">await<\/span> <span class=\"nx\">rust_func<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">Hello from Node!<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"nx\">callback<\/span><span class=\"p\">);<\/span>    \r\n<span class=\"p\">})().<\/span><span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u74b0\u5883 rustc 1.32.0 (9fda7c223 2019-01-16) Node.js 10.15.1  [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45288","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45288-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u74b0\u5883 rustc 1.32.0 (9fda7c223 2019-01-16) Node.js 10.15.1 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45288-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-04-15T17:55:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T09:58:44+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u5b87\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" 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Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-04-15T17:55:03+00:00\",\"dateModified\":\"2024-04-29T09:58:44+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/1a6ecd3d914d22a5ac32791ffc1fbd8e\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/45288-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/1a6ecd3d914d22a5ac32791ffc1fbd8e\",\"name\":\"\u6e05, 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