{"id":1436,"date":"2018-09-14T11:06:15","date_gmt":"2018-09-14T02:06:15","guid":{"rendered":"https:\/\/www.oqiita.com\/?p=1436"},"modified":"2018-09-14T11:06:15","modified_gmt":"2018-09-14T02:06:15","slug":"%e3%80%90node-js%e3%80%91%e9%9d%9e%e5%90%8c%e6%9c%9f%e5%87%a6%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.oqiita.com\/?p=1436","title":{"rendered":"\u3010node.js\u3011\u975e\u540c\u671f\u51e6\u7406"},"content":{"rendered":"<p>node.js \u3067\u4f55\u56de\u304bHTTP\u901a\u4fe1\u3092\u3057\u305f\u3068\u304d\u306e\u5bfe\u5fdc\u3002<\/p>\n<p><!--more--><\/p>\n<p><\/p>\n<p>node.js\u306f\u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002<br \/>\n\u3055\u3089\u306b\u30ce\u30f3\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u306a\u306e\u3067\u540c\u671f\u7684\u306a\u51e6\u7406\u306f\u57fa\u672c\u3057\u307e\u305b\u3093\u3002<br \/>\n\u306a\u306e\u3067HTTP\u901a\u4fe1\u3092\u884c\u3063\u3066\u3001\u7d50\u679c\u3092\u5f85\u3063\u3066\u3001\u6b21\u306e\u51e6\u7406\u3068\u3044\u3046\u306e\u306f<br \/>\n\u666e\u901a\u306b\u66f8\u304f\u3068\u30cd\u30b9\u30c8\u5730\u7344\u306b\u306a\u308a\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u8457\u3057\u304f\u60aa\u304f\u306a\u308a\u307e\u3059\u3002<br \/>\n\u3068\u3044\u3046\u3053\u3068\u3067\u4eca\u56de\u306f\u300cPromise\u300d\u3092\u4f7f\u7528\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u672c\u5f53\u306f\u300c<a href=\"https:\/\/www.npmjs.com\/package\/sync-request\" rel=\"noopener\" target=\"_blank\">sync-request<\/a>\u300d\u3092\u4f7f\u304a\u3046\u3068\u601d\u3063\u305f\u306e\u3067\u3059\u304c<br \/>\n\u975e\u63a8\u5968\uff1f\u306a\u306e\u304b\u3042\u307e\u308a\u4f7f\u3046\u306a\u3068\u66f8\u304b\u308c\u3066\u3044\u305f\u306e\u3067\u3001\u4eca\u56de\u306f\u30d1\u30b9\uff01<\/p>\n<p>\u3042\u3068\u4e00\u5fdc\u547d\u540d\u3084\u6587\u6cd5\u3082\u6c17\u306b\u306f\u3057\u3066\u307e\u3059\u304c\u3001\u5b8c\u5168\u306b\u5b88\u308c\u3066\u306f\u3044\u306a\u3044\u306e\u3042\u3057\u304b\u3089\u305a\u30fb\u30fb\u30fb<br \/>\n<a href=\"http:\/\/cou929.nu\/data\/google_javascript_style_guide\/\" rel=\"noopener\" target=\"_blank\">http:\/\/cou929.nu\/data\/google_javascript_style_guide\/<\/a><br \/>\n<a href=\"http:\/\/popkirby.github.io\/contents\/nodeguide\/style.html\" rel=\"noopener\" target=\"_blank\">http:\/\/popkirby.github.io\/contents\/nodeguide\/style.html<\/a><\/p>\n<h3 id=\"i-0\">\u4f55\u3082\u8003\u3048\u306a\u3044\u3067\u5b9f\u88c5\u3057\u305f\u5834\u5408<\/h3>\n<div class=\"pre_tag\"><span><i class=\"fa fa-code\"><\/i> app.js<\/span><\/p>\n<pre class=\"line-numbers\"><code class=\"language-js\">const https         = require ('https');\nconst url           = require('url');\nconst ACCESS_URL    = 'https:\/\/www.itcowork.co.jp\/';\nconst opt           = url.parse(ACCESS_URL);\nopt.method          = 'GET';\n\nconsole.log('START');\n\n\/\/ \u5909\u6570\u3092\u5ba3\u8a00\nvar code;\nvar body;\n\nvar req = https.request(opt, (res) =&gt; {\n    console.log('status code : ' + res.statusCode);\n    \n    code = res.statusCode;\n    body = '';\n\n    res.on('data', (chunk) =&gt; {\n        body += chunk;\n        console.log('data');\n    });\n\n    res.on('end', () =&gt; {\n        console.log('end');\n    });\n    \n})\n\nreq.on('error', (err) =&gt; {\n    console.log('request error : ' + err.message);\n});\n\nreq.end();\n\nconsole.log('LAST CHECK : ' + code);\n\nconsole.log('END');\n<\/code><\/pre>\n<\/div>\n<pre>\nSTART\nLAST CHECK : undefined\nEND\nstatus code : 200\ndata\nend\n<\/pre>\n<p>\u5148\u306b\u300cLAST CHECK\u300d\u304c\u51fa\u3066\u3042\u3068\u304b\u3089HTTP\u51e6\u7406\u306e\u7d50\u679c\u304c\u51fa\u3066\u3044\u307e\u3059\u3002<br \/>\n\uff11\u500b\u3060\u3051HTTP\u51e6\u7406\u3092\u3059\u308b\u5206\u306b\u306f\u3053\u308c\u3067\u3082\u5927\u4e08\u592b\u3067\u3059\u3002<br \/>\n\u3082\u3057\u304f\u306f\u300cend\u300d\u306e\u51e6\u7406\u306e\u90e8\u5206\u306b\u5225Function\u3092\u547c\u3073\u51fa\u3057\u3066\u30cd\u30b9\u30c8\u3057\u307e\u304f\u308b\u3068\u304b<br \/>\n\u3067\u3082\u4e00\u5fdc\u306f\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u304c\u3001\u4eca\u56de\u306f\u3082\u3063\u3068\u30b9\u30de\u30fc\u30c8\u306b\u66f8\u304d\u305f\u3044\u306e\u3067\u300cPromise\u300d\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<h3 id=\"i-1\">Promise\u3092\u5229\u7528\u3057\u305f\u5834\u5408<\/h3>\n<div class=\"pre_tag\"><span><i class=\"fa fa-code\"><\/i> app.js<\/span><\/p>\n<pre class=\"line-numbers\"><code class=\"language-js\">const https         = require ('https');\nconst url           = require('url');\nconst ACCESS_URL    = 'https:\/\/www.itcowork.co.jp\/';\nconst opt           = url.parse(ACCESS_URL);\nopt.method          = 'GET';\n\nconsole.log('START');\n\ntest1().then((value) =&gt; {\n\n    console.log('status code : ' + value);\n    console.log('END');\n\n}, (err) =&gt; {\n    console.error(\"error:\", err.message);\n});\n\n\nfunction test1(){\n\n    return new Promise ((resolve, reject) =&gt; {\n        var req = https.request(opt, (res) =&gt; {\n            console.log('1.status code(function) : ' + res.statusCode);\n            \n            var code = res.statusCode;\n            var body = '';\n        \n            res.on('data', (chunk) =&gt; {\n                body += chunk;\n                console.log('1.data');\n            });\n        \n            res.on('end', () =&gt; {\n                console.log('1.end');\n                resolve(code);\n            });\n            \n        })\n        \n        req.on('error', (err) =&gt; {\n            console.log('1.request error : ' + err.message);\n            reject(err)\n        });\n        \n        req.end();\n    }); \n}<\/code><\/pre>\n<\/div>\n<pre>\nSTART\n1.status code(function) : 200\n1.data\n1.end\nstatus code : 200\nEND\n<\/pre>\n<p>Promise\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3066\u3001then\u3067\u5b9f\u884c\u3057\u5b9f\u884c\u7d50\u679c\u3092\u53d6\u5f97\u3057\u307e\u3057\u305f\u3002<br \/>\n\u6b63\u3057\u3044\u9806\u5e8f\u3067\u30ed\u30b0\u304c\u51fa\u3066\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<h3 id=\"i-2\">\u8907\u6570\u56deHTTP\u901a\u4fe1<\/h3>\n<p>\u6b21\u306b\u8907\u6570\u56de\u306eHTTP\u901a\u4fe1\u306e\u5b9f\u88c5\u3067\u3059\u3002<br \/>\n\u304a\u8a66\u3057\u306a\u306e\u3067HTTP\u901a\u4fe1\u5148\u306f\u307e\u3063\u305f\u304f\u540c\u3058\u3067\u3059\u3054\u3081\u3093\u306a\u3055\u3044m(_ _)m<\/p>\n<div class=\"pre_tag\"><span><i class=\"fa fa-code\"><\/i> app.js<\/span><\/p>\n<pre class=\"line-numbers\"><code class=\"language-js\">const https         = require ('https');\nconst url           = require('url');\nconst ACCESS_URL    = 'https:\/\/www.itcowork.co.jp\/';\nconst opt           = url.parse(ACCESS_URL);\nopt.method          = 'GET';\n\nconsole.log('START');\n\nvar promise = Promise.resolve();\npromise\n    .then(test1)\n    .then((result) =&gt; {\n        return new Promise(function(resolve, reject){\n            console.log(\"1.status code : \" + result);\n            resolve(1);\n        });\n    })\n    .then(test2)\n    .then((result) =&gt; {\n        return new Promise(function(resolve, reject){\n            console.log(\"2.status code : \" + result);\n            resolve(2); \n        });\n    })\n    .catch(onRejectted);\n\n\nfunction test1(){\n\n    return new Promise ((resolve, reject) =&gt; {\n        var req = https.request(opt, (res) =&gt; {\n            console.log('1.status code(function) : ' + res.statusCode);\n            \n            var code = res.statusCode;\n            var body = '';\n        \n            res.on('data', (chunk) =&gt; {\n                body += chunk;\n                console.log('1.data');\n            });\n        \n            res.on('end', () =&gt; {\n                console.log('1.end');\n                resolve(code);\n            });\n            \n        })\n        \n        req.on('error', (err) =&gt; {\n            console.log('1.request error : ' + err.message);\n            reject(err)\n        });\n        \n        req.end();\n    }); \n}\n\nfunction test2(){\n\n    return new Promise ((resolve, reject) =&gt; {\n        var req = https.request(opt, (res) =&gt; {\n            console.log('2.status code(function) : ' + res.statusCode);\n            \n            var code = res.statusCode;\n            var body = '';\n        \n            res.on('data', (chunk) =&gt; {\n                body += chunk;\n                console.log('2.data');\n            });\n        \n            res.on('end', () =&gt; {\n                console.log('2.end');\n                resolve(code);\n            });\n            \n        })\n        \n        req.on('error', (err) =&gt; {\n            console.log('2.request error : ' + err.message);\n            reject(err)\n        });\n        \n        req.end();\n    }); \n}\n\nfunction onRejectted(error) {\n    console.log(\"error\uff1a\" + error);\n}<\/code><\/pre>\n<\/div>\n<pre>\nSTART\n1.status code(function) : 200\n1.data\n1.end\n1.status code : 200\n2.status code(function) : 200\n2.data\n2.end\n2.status code : 200\n<\/pre>\n<p>\u3082\u3057\u300ctest1\u300d\u3068\u300ctest2\u300d\u306eFunction\u306b\u5f15\u6570\u3092\u6e21\u3059\u5834\u5408\u306f<br \/>\n\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u547c\u3073\u51fa\u305b\u3070\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"line-numbers\"><code class=\"language-js\">var promise = Promise.resolve();\npromise\n    .then((result) =&gt; {\n        return test1(1);\n    })\n    .then((result) =&gt; {\n        return new Promise(function(resolve, reject){\n            console.log(\"1.status code : \" + result);\n            resolve(1);\n        });\n    })\n    .then((result) =&gt; {\n        return test2(2);\n    })\n    .then((result) =&gt; {\n        return new Promise(function(resolve, reject){\n            console.log(\"2.status code : \" + result);\n            resolve(2); \n        });\n    })\n    .catch(onRejectted);\n<\/code><\/pre>\n<p>\u9014\u4e2d\u3067\u30a8\u30e9\u30fc\u306b\u3057\u305f\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u308c\u3070OK\u306e\u306f\u305a<\/p>\n<pre class=\"line-numbers\"><code class=\"language-js\">var promise = Promise.resolve();\npromise\n    .then(test1)\n    .then((result) =&gt; {\n        return new Promise(function(resolve, reject){\n            console.log(\"1.status code : \" + result);\n            if(result == 404) reject(new Error(\"\u308f\u3056\u3068\u30a8\u30e9\u30fc\"));\n            \/\/resolve(1);\n        });\n    })\n    .then(test2)\n    .then((result) =&gt; {\n        return new Promise(function(resolve, reject){\n            console.log(\"2.status code : \" + result);\n            resolve(2); \n        });\n    })\n    .catch(onRejectted);<\/code><\/pre>\n<pre>\nSTART\n1.status code(function) : 404\n1.data\n1.end\n1.status code : 404\nerror\uff1aError: \u308f\u3056\u3068\u30a8\u30e9\u30fc\n<\/pre>\n<h3 id=\"i-3\">\u307e\u3068\u3081<\/h3>\n<p>\u4e45\u3057\u3076\u308a\u306b\u8907\u6570\u51e6\u7406\u3092\u66f8\u304d\u307e\u3057\u305f\u304c\u3001<br \/>\n\u975e\u540c\u671f\u3068\u304b\u4e45\u3057\u3076\u308a\u3059\u304e\u3066\u5fd8\u308c\u3066\u307e\u3057\u305f\uff01<br \/>\n\u305d\u3057\u3066\u672a\u3060\u306b\u30a2\u30ed\u30fc\u95a2\u6570\uff08=&gt;\uff09\u306b\u6163\u308c\u307e\u305b\u3093\uff57<\/p>\n<p>\u3061\u306a\u307f\u306b\u30bd\u30fc\u30b9\u4e2d\u3067HTTP\u30a2\u30af\u30bb\u30b9\u3057\u3066\u308b\u306e\u306f<br \/>\n<a href=\"https:\/\/www.itcowork.co.jp\/\" rel=\"noopener\" target=\"_blank\">\u524d\u8077\u306eWEB\u30b5\u30a4\u30c8<\/a>\u3067\u3059\u3002\u6012\u3089\u308c\u305f\u3089\u5909\u66f4\u3057\u3088\u3046\uff01<\/p>\n<p>\u4ee5\u4e0a<\/p>\n","protected":false},"excerpt":{"rendered":"<p>node.js \u3067\u4f55\u56de\u304bHTTP\u901a\u4fe1\u3092\u3057\u305f\u3068\u304d\u306e\u5bfe\u5fdc\u3002<\/p>\n","protected":false},"author":1,"featured_media":743,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[8,9],"tags":[65,143,13,11,181,183,182],"class_list":{"0":"post-1436","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-javascript","8":"category-node-js","9":"tag-http","11":"tag-javascript","12":"tag-node","13":"tag-promise","14":"tag-183","15":"tag-182","16":"entry"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.oqiita.com\/wp-content\/uploads\/2017\/06\/sango_nodejs_icatch.png","jetpack_shortlink":"https:\/\/wp.me\/p8QluP-na","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.oqiita.com\/index.php?rest_route=\/wp\/v2\/posts\/1436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oqiita.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oqiita.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oqiita.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oqiita.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1436"}],"version-history":[{"count":3,"href":"https:\/\/www.oqiita.com\/index.php?rest_route=\/wp\/v2\/posts\/1436\/revisions"}],"predecessor-version":[{"id":1439,"href":"https:\/\/www.oqiita.com\/index.php?rest_route=\/wp\/v2\/posts\/1436\/revisions\/1439"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oqiita.com\/index.php?rest_route=\/wp\/v2\/media\/743"}],"wp:attachment":[{"href":"https:\/\/www.oqiita.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oqiita.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oqiita.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}