[Style] Separate dbRouter

 const mysql = require("mysql");
 const mysql = require("mysql");
+const mysql2 = require("mysql2/promise");
 const fs = require("fs");
 const fs = require("fs");
 const parseICal = require("./ICal");
 const parseICal = require("./ICal");
 
 
@@ -61,8 +62,19 @@ function jcalToSQL(jcal, userID) {
 
 
 // iCal의 소유주를 DB에 등록 후 userID get
 // iCal의 소유주를 DB에 등록 후 userID get
 // subjectID가 subjects, userID가 users에 있어야함
 // subjectID가 subjects, userID가 users에 있어야함
-const fdata = fs.readFileSync("C:/Users/teddy/Downloads/data.ics", "utf8");
-const jcal = parseICal(fdata);
-jcalToSQL(jcal, 1);
 
 
-module.exports = jcalToSQL;
+// const fdata = fs.readFileSync("C:/Users/teddy/Downloads/data.ics", "utf8");
+// const jcal = parseICal(fdata);
+// jcalToSQL(jcal, 1);
+
+const [id, pw] = fs
+  .readFileSync("server/libs/sql.pvdata", "utf8")
+  .split("\r\n");
+const connectOption = {
+  host: "localhost",
+  user: id,
+  password: pw,
+  database: "db",
+};
+
+module.exports = { jcalToSQL, connectOption };

 const express = require("express");
 const express = require("express");
-const mysql = require("mysql2/promise");
-const fs = require("fs");
-const router = express.Router();
+const dbRouter = express.Router();
 
 
-async function route() {
-  const [id, pw] = fs
-    .readFileSync("server/libs/sql.pvdata", "utf8")
-    .split("\r\n");
-  const connection = await mysql.createConnection({
-    host: "localhost",
-    user: id,
-    password: pw,
-    database: "db",
-  });
-
-  // (userID, date) => schedules
-  router.get("/schedules_date", async (req, res) => {
-    console.log("/db/schedules_date");
-    try {
-      const queryString = `
-      SELECT sc.label, sc.type, sc.description, sc.url, sc.detail, sbj.name, us.color
-      FROM schedules_date sc
-      INNER JOIN \`user-subject\` us
-        ON sc.userID = us.userID
-        AND sc.subjectID = us.subjectID
-        AND us.status = 1
-      INNER JOIN subjects sbj
-        ON sc.subjectID = sbj.ID
-      WHERE sc.date = "${req.query.date}"
-        AND sc.userID = ${req.query.userID}
-        AND sc.status = 1`;
-      const [results] = await connection.query(queryString);
-      res.send(results);
-    } catch (e) {
-      console.log(e);
-      res.end();
-    }
-  });
-
-  // (ID) => null | name  //unused
-  router.get("/subjects", async (req, res) => {
-    console.log("/db/subjects");
-    try {
-      const queryString = `
-      SELECT name FROM subjects sbj
-        WHERE sbj.ID = ${req.query.ID}`;
-      const [results] = await connection.query(queryString);
-      res.send(results.length && results[0].name);
-    } catch (e) {
-      console.log(e);
-      res.end();
-    }
-  });
-
-  // (loginID) => null | ID(str)
-  router.get("/users", async (req, res) => {
-    console.log("/db/users");
-    try {
-      const queryString = `
-      SELECT ID FROM users us
-        WHERE us.loginID = '${req.query.loginID}'`;
-      const [results] = await connection.query(queryString);
-      res.send(results.length ? results[0].ID.toString() : null);
-    } catch (e) {
-      console.log(e);
-      res.end();
-    }
-  });
+const schedules_dateRouter = require("./schedules_date");
+const subjectsRouter = require("./Subjects");
+const userSubjectRouter = require("./user-subject");
+const usersRouter = require("./Users");
 
 
-  // (loginID, loginPW) => null | "correct"
-  router.get("/users/check", async (req, res) => {
-    console.log("/db/users/check");
-    try {
-      const queryString = `
-      SELECT loginPW FROM users us
-        WHERE us.loginID = '${req.query.loginID}'`;
-      const [results] = await connection.query(queryString);
-      res.send(results[0].loginPW === req.query.loginPW ? "correct" : null);
-    } catch (e) {
-      console.log(e);
-      res.end();
-    }
-  });
-
-  // (userID) => subjects
-  router.get("/user-subject", async (req, res) => {
-    console.log("/db/user-subject");
-    try {
-      const queryString = `
-        SELECT subjectID, nickname, status, color FROM \`user-subject\` us
-          WHERE us.userID = ${req.query.userID}`;
-      const [results] = await connection.query(queryString);
-      res.send(results);
-    } catch (e) {
-      console.log(e);
-      res.end();
-    }
-  });
-
-  router.get("*", (req, res) => {
-    console.log("/db/*");
-    res.end();
-  });
+async function route() {
+  dbRouter.use("/user-subject", userSubjectRouter);
+  dbRouter.use("/users", usersRouter);
+  dbRouter.use("/subjects", subjectsRouter);
+  dbRouter.use("/schedules_date", schedules_dateRouter);
 }
 }
 
 
 route();
 route();
 
 
-module.exports = router;
+module.exports = dbRouter;

+const express = require("express");
+const mysql2 = require("mysql2/promise");
+const { connectOption } = require("../libs/MySQL");
+const schedules_dateRouter = express.Router();
+
+async function route() {
+  const connection = await mysql2.createConnection(connectOption);
+
+  // (userID, date) => schedules
+  schedules_dateRouter.get("/", async (req, res) => {
+    console.log("/db/schedules_date");
+    try {
+      const queryString = `
+      SELECT sc.label, sc.type, sc.description, sc.url, sc.detail, sbj.name, us.color
+      FROM schedules_date sc
+      INNER JOIN \`user-subject\` us
+        ON sc.userID = us.userID
+        AND sc.subjectID = us.subjectID
+        AND us.status = 1
+      INNER JOIN subjects sbj
+        ON sc.subjectID = sbj.ID
+      WHERE sc.date = "${req.query.date}"
+        AND sc.userID = ${req.query.userID}
+        AND sc.status = 1`;
+      const [results] = await connection.query(queryString);
+      res.send(results);
+    } catch (e) {
+      console.log(e);
+      res.end();
+    }
+  });
+}
+route();
+
+module.exports = schedules_dateRouter;

+const express = require("express");
+const mysql2 = require("mysql2/promise");
+const { connectOption } = require("../libs/MySQL");
+const subjectsRouter = express.Router();
+
+async function route() {
+  const connection = await mysql2.createConnection(connectOption);
+
+  // (ID) => null | name  //unused
+  subjectsRouter.get("/", async (req, res) => {
+    console.log("/db/subjects");
+    try {
+      const queryString = `
+      SELECT name FROM subjects sbj
+        WHERE sbj.ID = ${req.query.ID}`;
+      const [results] = await connection.query(queryString);
+      res.send(results.length && results[0].name);
+    } catch (e) {
+      console.log(e);
+      res.end();
+    }
+  });
+}
+route();
+
+module.exports = subjectsRouter;

+const express = require("express");
+const mysql2 = require("mysql2/promise");
+const { connectOption } = require("../libs/MySQL");
+const userSubjectRouter = express.Router();
+
+async function route() {
+  const connection = await mysql2.createConnection(connectOption);
+
+  // (userID) => subjects
+  userSubjectRouter.get("/", async (req, res) => {
+    console.log("/db/user-subject");
+    try {
+      const queryString = `
+        SELECT subjectID, nickname, status, color FROM \`user-subject\` us
+          WHERE us.userID = ${req.query.userID}`;
+      const [results] = await connection.query(queryString);
+      res.send(results);
+    } catch (e) {
+      console.log(e);
+      res.end();
+    }
+  });
+}
+route();
+
+module.exports = userSubjectRouter;

+const express = require("express");
+const mysql2 = require("mysql2/promise");
+const { connectOption } = require("../libs/MySQL");
+const usersRouter = express.Router();
+
+async function route() {
+  const connection = await mysql2.createConnection(connectOption);
+
+  // (loginID) => null | ID(str)
+  usersRouter.get("/", async (req, res) => {
+    console.log("/db/users");
+    try {
+      const queryString = `
+          SELECT ID FROM users us
+            WHERE us.loginID = '${req.query.loginID}'`;
+      const [results] = await connection.query(queryString);
+      res.send(results.length ? results[0].ID.toString() : null);
+    } catch (e) {
+      console.log(e);
+      res.end();
+    }
+  });
+
+  // (loginID, loginPW) => null | "correct"
+  usersRouter.get("/check", async (req, res) => {
+    console.log("/db/users/check");
+    try {
+      const queryString = `
+          SELECT loginPW FROM users us
+            WHERE us.loginID = '${req.query.loginID}'`;
+      const [results] = await connection.query(queryString);
+      res.send(results[0].loginPW === req.query.loginPW ? "correct" : null);
+    } catch (e) {
+      console.log(e);
+      res.end();
+    }
+  });
+}
+route();
+
+module.exports = usersRouter;

 const express = require("express");
 const express = require("express");
-const bodyParser = require("body-parser");
 const fs = require("fs");
 const fs = require("fs");
 const cors = require("cors");
 const cors = require("cors");
-const { getPeed, getSubjects, login } = require("./libs/E_Campus.js");
 
 
 const loginRouter = require("./routers/Login");
 const loginRouter = require("./routers/Login");
 const dbRouter = require("./routers/DB");
 const dbRouter = require("./routers/DB");
@@ -21,8 +19,7 @@ app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 app.use(express.urlencoded({ extended: true }));
 
 
 app.post("/", (req, res) => {
 app.post("/", (req, res) => {
-  res.send({ body: req.body });
-  console.log("listened /");
+  console.log("/");
 });
 });
 
 
 app.use("/login", loginRouter);
 app.use("/login", loginRouter);