Node.js\uc758 Express<\/strong>\ub294 \uc6f9 \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc744 \uc704\ud55c \uac15\ub825\ud558\uace0 \uc720\uc5f0\ud55c \ud504\ub808\uc784\uc6cc\ud06c\uc785\ub2c8\ub2e4. Express\uc758 \uac00\uc7a5 \ud070 \uc7a5\uc810\u4e4b\u4e00\uc740 \ubbf8\ub4e4\uc6e8\uc5b4(middleware)\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc694\uccad\uacfc \uc751\ub2f5\uc744 \ucc98\ub9ac\ud560 \uc218 \uc788\ub294 \uae30\ub2a5\uc785\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 Express\uc5d0\uc11c \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4\uc640 \ud50c\ub7ec\uadf8\uc778\uc744 \uac1c\ubc1c\ud558\ub294 \ubc29\ubc95\uc744 \uc790\uc138\ud788 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n \ubbf8\ub4e4\uc6e8\uc5b4\ub294 \uc694\uccad(Request)\uacfc \uc751\ub2f5(Response) \uac1d\uccb4 \uc0ac\uc774\uc5d0\uc11c \uc2e4\ud589\ub418\ub294 \ud568\uc218\uc785\ub2c8\ub2e4. \uc774 \ud568\uc218\ub294 \uc694\uccad\uc744 \ucc98\ub9ac\ud558\uac70\ub098 \uc694\uccad\/\uc751\ub2f5 \uac1d\uccb4\ub97c \ubcc0\uacbd\ud560 \uc218 \uc788\ub294 \uae30\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. Express\uc5d0\uc11c \ubbf8\ub4e4\uc6e8\uc5b4\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4:<\/p>\n \uc548\uc815\uc801\uc778 \uc6f9 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uad6c\ucd95\ud558\uae30 \uc704\ud574 \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4\ub97c \uc791\uc131\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4\uc758 \uae30\ubcf8 \uad6c\uc870\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4\ub294 Express\uc5d0\uc11c \ubbf8\ub4e4\uc6e8\uc5b4\ub294 \uc694\uccad \ud30c\uc774\ud504\ub77c\uc778\uc758 \uc77c\ubd80\ub85c \uc791\ub3d9\ud569\ub2c8\ub2e4. \uc694\uccad\uc774 \ub4e4\uc5b4\uc628 \uc21c\uc11c\ub300\ub85c \ubbf8\ub4e4\uc6e8\uc5b4\uac00 \uc2e4\ud589\ub429\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \ubbf8\ub4e4\uc6e8\uc5b4\uac00 \uc5b4\ub5bb\uac8c \ud750\ub974\ub294\uc9c0\ub97c \uc124\uba85\ud569\ub2c8\ub2e4:<\/p>\n Express\uc758 \ud50c\ub7ec\uadf8\uc778\uc740 \ubbf8\ub4e4\uc6e8\uc5b4\uc640 \ube44\uc2b7\ud558\uc9c0\ub9cc \ud2b9\uc815 \uae30\ub2a5\uc774\ub098 \ubaa8\ub4c8\uc744 \uc704\ud574 \uc124\uacc4\ub41c \uc77c\ubc18\uc801\uc778 \uae30\ub2a5\uc785\ub2c8\ub2e4. \ucee4\uc2a4\ud140 \ud50c\ub7ec\uadf8\uc778\uc744 \ub9cc\ub4e4\uae30 \uc704\ud574 \uc544\ub798\uc758 \ub2e8\uacc4\ub97c \ub530\ub974\uba74 \ub429\ub2c8\ub2e4.<\/p>\n \ud50c\ub7ec\uadf8\uc778\uc740 \ubcf4\ud1b5 \uc544\ub798\uc758 \ud615\uc2dd\uc744 \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n \ub2e4\uc74c\uc740 \uc694\uccad\uc5d0 \ub300\ud574 \ud2b9\uc815 \uac80\uc99d\uc744 \ucd94\uac00\ud558\ub294 \uac04\ub2e8\ud55c \ud50c\ub7ec\uadf8\uc778\uc744 \ub9cc\ub4dc\ub294 \uc608\uc81c\uc785\ub2c8\ub2e4:<\/p>\n Express\uc5d0\uc11c \uc5d0\ub7ec \ucc98\ub9ac\ub294 \ub2e4\ub978 \ubbf8\ub4e4\uc6e8\uc5b4\uc640 \ub3d9\uc77c\ud558\uac8c \ucc98\ub9ac\ub418\uc9c0\ub9cc, \uc5d0\ub7ec \ucc98\ub9ac \ubbf8\ub4e4\uc6e8\uc5b4\uc758 \uccab \ubc88\uc9f8 \ub9e4\uac1c\ubcc0\uc218\ub294 \uc5d0\ub7ec \uac1d\uccb4\uc785\ub2c8\ub2e4. \uc5d0\ub7ec \ucc98\ub9ac \ubbf8\ub4e4\uc6e8\uc5b4\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ud569\ub2c8\ub2e4:<\/p>\n \uc544\ub798\ub294 \uac04\ub2e8\ud55c \uc5d0\ub7ec \ubc1c\uc0dd \uc608\uc81c\ub97c \ud3ec\ud568\ud55c Express \uc11c\ubc84\uc785\ub2c8\ub2e4:<\/p>\n \ub85c\uadf8\ub97c \ub0a8\uae30\ub294 \uac83\uc740 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ubb38\uc81c\ub97c \uc9c4\ub2e8\ud558\ub294 \ub370 \ud575\uc2ec\uc801\uc778 \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \uc694\uccad\uc744 \uae30\ub85d\ud558\ub294 \ucee4\uc2a4\ud140 \ub85c\uae45 \ubbf8\ub4e4\uc6e8\uc5b4\uc758 \uc608\uc785\ub2c8\ub2e4:<\/p>\n \ubbf8\ub4e4\uc6e8\uc5b4\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \uc131\ub2a5\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce60 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud558\uae30 \uc704\ud55c \uba87 \uac00\uc9c0 \ud301\uc785\ub2c8\ub2e4:<\/p>\n \uc774\ubc88 \uae00\uc5d0\uc11c\ub294 Express\uc5d0\uc11c \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4 \ubc0f \ud50c\ub7ec\uadf8\uc778\uc744 \uac1c\ubc1c\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \ubbf8\ub4e4\uc6e8\uc5b4\ub97c \ud1b5\ud574 \uc694\uccad \ucc98\ub9ac \uacfc\uc815\uc744 \uc720\uc5f0\ud558\uac8c \uc81c\uc5b4\ud560 \uc218 \uc788\uc73c\uba70, \uc774\ub97c \ud1b5\ud574 \ubcf4\ub2e4 \ud6a8\uc728\uc801\uc774\uace0 \uc720\uc9c0\ubcf4\uc218\ud558\uae30 \uc26c\uc6b4 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc591\ud55c \uc608\uc81c\ub97c \ud1b5\ud574 \ubbf8\ub4e4\uc6e8\uc5b4\uc758 \uc791\uc131\uacfc \ub4f1\ub85d, \uc0ac\uc6a9 \ubc29\ubc95\uc744 \uc0b4\ud3b4\ubcf4\uc558\uc73c\ub2c8, \uc5ec\ub7ec\ubd84\uc758 \ud504\ub85c\uc81d\ud2b8\uc5d0 \uc774\ub7ec\ud55c \ubbf8\ub4e4\uc6e8\uc5b4\ub97c \uc801\uc6a9\ud574 \ubcf4\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n \ub354 \ub098\uc544\uac00, Express\uc758 \uae30\ub2a5\uc744 \ud65c\uc6a9\ud558\uc5ec \uc790\uc2e0\ub9cc\uc758 \ud50c\ub7ec\uadf8\uc778\uc744 \uac1c\ubc1c\ud558\uace0, \ud544\uc694\uc5d0 \ub530\ub77c \uc11c\ubc84\ub97c \ucd5c\uc801\ud654\ud558\ub294 \ubc29\ubc95\uc744 \uace0\ubbfc\ud574 \ubcf4\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4. \ub354 \ubcf5\uc7a1\ud55c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c\ub294 \ub2e4\uc218\uc758 \ubbf8\ub4e4\uc6e8\uc5b4\uac00 \uc0c1\ud638\uc791\uc6a9\ud558\uba70, \uc774\ub7ec\ud55c \uc0c1\ud638\uc791\uc6a9\uc744 \uc774\ud574\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4\ub97c \ud65c\uc6a9\ud558\uc5ec \uae30\ub2a5\uc744 \ud655\uc7a5\ud558\uace0, \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud558\ub294 \uac15\ub825\ud55c Express \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ub9cc\ub4e4\uc5b4 \ubcf4\uc2ed\uc2dc\uc624.<\/p>\n <\/body><\/p>\n","protected":false},"excerpt":{"rendered":"1. Express \ubbf8\ub4e4\uc6e8\uc5b4\ub780?<\/h2>\n
\n
2. \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4 \ub9cc\ub4e4\uae30<\/h2>\n
function customMiddleware(req, res, next) {\n \/\/ \uc694\uccad \ucc98\ub9ac\n console.log('\uc694\uccad \uc815\ubcf4:', req.method, req.url);\n \n \/\/ \ub2e4\uc74c \ubbf8\ub4e4\uc6e8\uc5b4\ub85c \ub118\uc5b4\uac00\uae30\n next();\n}<\/code><\/pre>\n2.1. \ubbf8\ub4e4\uc6e8\uc5b4\uc758 \ub4f1\ub85d<\/h3>\n
app.use()<\/code> \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub4f1\ub85d\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub2e4\uc74c\uc740 \uae30\ubcf8\uc801\uc778 Express \uc11c\ubc84\uc5d0 \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4\ub97c \ub4f1\ub85d\ud558\ub294 \ubc29\ubc95\uc785\ub2c8\ub2e4:<\/p>\nconst express = require('express');\nconst app = express();\n\n\/\/ \ucee4\uc2a4\ud140 \ubbf8\ub4e4\uc6e8\uc5b4 \uc815\uc758\nfunction customMiddleware(req, res, next) {\n console.log('\uc694\uccad \uc815\ubcf4:', req.method, req.url);\n next();\n}\n\n\/\/ \ubbf8\ub4e4\uc6e8\uc5b4 \ub4f1\ub85d\napp.use(customMiddleware);\n\n\/\/ \ub77c\uc6b0\ud2b8 \uc815\uc758\napp.get('\/', (req, res) => {\n res.send('\uc548\ub155\ud558\uc138\uc694, Express!');\n});\n\n\/\/ \uc11c\ubc84 \uc2dc\uc791\napp.listen(3000, () => {\n console.log('\uc11c\ubc84\uac00 http:\/\/localhost:3000 \uc5d0\uc11c \uc2e4\ud589 \uc911\uc785\ub2c8\ub2e4.');\n});<\/code><\/pre>\n3. \ubbf8\ub4e4\uc6e8\uc5b4\uc758 \ud750\ub984<\/h2>\n
\n
next()<\/code> \ud638\ucd9c\ub85c \ub2e4\uc74c \ubbf8\ub4e4\uc6e8\uc5b4\ub85c \ub118\uc5b4\uac11\ub2c8\ub2e4.<\/li>\n4. \ucee4\uc2a4\ud140 \ud50c\ub7ec\uadf8\uc778 \uac1c\ubc1c\ud558\uae30<\/h2>\n
4.1. \ud50c\ub7ec\uadf8\uc778 \uad6c\uc870<\/h3>\n
module.exports = function(options) {\n return function(req, res, next) {\n \/\/ \ud50c\ub7ec\uadf8\uc778 \ub85c\uc9c1\n next();\n };\n};<\/code><\/pre>\n4.2. \ud50c\ub7ec\uadf8\uc778 \uc608\uc81c<\/h3>\n
function validateRequest(options) {\n return function(req, res, next) {\n const apiKey = req.headers['x-api-key'];\n \n if (apiKey === options.apiKey) {\n next(); \/\/ \uc62c\ubc14\ub978 API \ud0a4\uac00 \uc81c\uacf5\ub418\uba74 \ub2e4\uc74c\uc73c\ub85c \uc9c4\ud589\n } else {\n res.status(403).send('Forbidden: Invalid API key');\n }\n };\n}\n\n\/\/ \ud50c\ub7ec\uadf8\uc778 \uc0ac\uc6a9 \uc608\nconst express = require('express');\nconst app = express();\n\nconst apiKeyPlugin = validateRequest({ apiKey: 'my-secret-key' });\napp.use(apiKeyPlugin);\n\n\/\/ \ub77c\uc6b0\ud2b8 \uc815\uc758\napp.get('\/', (req, res) => {\n res.send('\uc548\ub155\ud558\uc138\uc694, \uc62c\ubc14\ub978 API \ud0a4\uac00 \uc788\uc2b5\ub2c8\ub2e4!');\n});\n\napp.listen(3000, () => {\n console.log('\uc11c\ubc84\uac00 http:\/\/localhost:3000 \uc5d0\uc11c \uc2e4\ud589 \uc911\uc785\ub2c8\ub2e4.');\n});<\/code><\/pre>\n5. \uc5d0\ub7ec \ucc98\ub9ac \ubbf8\ub4e4\uc6e8\uc5b4<\/h2>\n
app.use((err, req, res, next) => {\n console.error(err.stack);\n res.status(500).send('\ubb34\uc5b8\uac00 \uc798\ubabb\ub418\uc5c8\uc2b5\ub2c8\ub2e4!');\n});<\/code><\/pre>\n5.1. \uc5d0\ub7ec \ucc98\ub9ac \ubbf8\ub4e4\uc6e8\uc5b4 \uc608\uc81c<\/h3>\n
const express = require('express');\nconst app = express();\n\n\/\/ \ub77c\uc6b0\ud2b8 \uc815\uc758\napp.get('\/', (req, res) => {\n res.send('\uc548\ub155\ud558\uc138\uc694, Express!');\n});\n\n\/\/ \uc758\ub3c4\uc801\uc778 \uc5d0\ub7ec \ubc1c\uc0dd\napp.get('\/error', (req, res, next) => {\n next(new Error('\uc758\ub3c4\uc801\uc778 \uc5d0\ub7ec \ubc1c\uc0dd'));\n});\n\n\/\/ \uc5d0\ub7ec \ucc98\ub9ac \ubbf8\ub4e4\uc6e8\uc5b4\napp.use((err, req, res, next) => {\n console.error(err.stack);\n res.status(500).send('\ubb34\uc5b8\uac00 \uc798\ubabb\ub418\uc5c8\uc2b5\ub2c8\ub2e4!');\n});\n\n\/\/ \uc11c\ubc84 \uc2dc\uc791\napp.listen(3000, () => {\n console.log('\uc11c\ubc84\uac00 http:\/\/localhost:3000 \uc5d0\uc11c \uc2e4\ud589 \uc911\uc785\ub2c8\ub2e4.');\n});<\/code><\/pre>\n6. \ub85c\uae45 \ubbf8\ub4e4\uc6e8\uc5b4 \uc608\uc81c<\/h2>\n
function loggingMiddleware(req, res, next) {\n const currentDate = new Date().toISOString();\n console.log(`[${currentDate}] ${req.method} ${req.url}`);\n next();\n}\n\n\/\/ \uc11c\ubc84 \uc124\uc815\nconst express = require('express');\nconst app = express();\napp.use(loggingMiddleware);\n\n\/\/ \ub77c\uc6b0\ud2b8 \uc815\uc758\napp.get('\/', (req, res) => {\n res.send('\uc548\ub155\ud558\uc138\uc694, Express!');\n});\n\n\/\/ \uc11c\ubc84 \uc2dc\uc791\napp.listen(3000, () => {\n console.log('\uc11c\ubc84\uac00 http:\/\/localhost:3000 \uc5d0\uc11c \uc2e4\ud589 \uc911\uc785\ub2c8\ub2e4.');\n});<\/code><\/pre>\n7. \uc131\ub2a5 \ucd5c\uc801\ud654\ub97c \uc704\ud55c \ubbf8\ub4e4\uc6e8\uc5b4<\/h2>\n
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8. \uacb0\ub860<\/h2>\n