diff --git a/context.js b/context.js
index fe44f85..e50229a 100644
--- a/context.js
+++ b/context.js
@@ -1,3 +1,3 @@
 import { AsyncLocalStorage } from "node:async_hooks";
 
-export const httpStorage = new AsyncLocalStorage();
+export const ctxStorage = new AsyncLocalStorage();
diff --git a/db.js b/db.js
index fbd907f..a3ba73d 100644
--- a/db.js
+++ b/db.js
@@ -5,12 +5,12 @@ const connectionConfig = {
   user: process.env.MSSQL_USER,
   password: process.env.MSSQL_PASSWORD,
   database: process.env.MSSQL_DB,
-  server: process.env.MSSQL_HOST,
-  port: Number.parseInt(process.env.MSSQL_PORT, 10) || 1433,
+  server: process.env.MSSQL_HOST || "localhost",
+  port: Number.parseInt(process.env.MSSQL_PORT || "1433", 10),
   pool: {
     max: 10,
     min: 0,
-    idleTimeoutMillis: 5000
+    idleTimeoutMillis: 30000
   },
   options: {
     trustServerCertificate: true
diff --git a/errors/index.js b/errors/index.js
new file mode 100644
index 0000000..0325fd1
--- /dev/null
+++ b/errors/index.js
@@ -0,0 +1,37 @@
+export class HttpError extends Error {
+  /**
+   * @param {{ name?: string, message: string, statusCode: number }} msg
+   */
+  constructor({ name, message, statusCode = 500 }) {
+    super(message);
+    this.name = name || this.constructor.name;
+    this.statusCode = statusCode;
+    Error.captureStackTrace(this);
+  }
+}
+
+export class BadRequestError extends HttpError {
+  /**
+   * @param {string} [message]
+   */
+  constructor(message) {
+    super({
+      name: "E_BAD_REQUEST",
+      message: message || "Bad Request",
+      statusCode: 400
+    });
+  }
+}
+
+export class NotFoundError extends HttpError {
+  /**
+   * @param {string} [message]
+   */
+  constructor(message) {
+    super({
+      name: "E_NOT_FOUND",
+      message: message || "Not found",
+      statusCode: 404
+    });
+  }
+}
diff --git a/index.d.ts b/index.d.ts
index b41b4e7..0d86061 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -19,6 +19,7 @@ declare global {
 
   type HTTPResponse = {
     sendJson: (data: Record<string, unknown>, statusCode?: number = 200) => http.ServerResponse;
+    sendSSEJson: (data: Record<string, unknown>, eventName: string, statusCode?: number = 200) => void;
     sendText: (text: string, statusCode?: number = 200) => http.ServerResponse;
     res: http.ServerResponse;
   };
diff --git a/index.js b/index.js
index ca5bd00..1271599 100644
--- a/index.js
+++ b/index.js
@@ -1,31 +1,26 @@
 import http from "node:http";
 import { routeHandler } from "./router/index.js";
 import packageJson from "./package.json" with { type: "json" };
-import { httpStorage } from "./context.js";
-// import db from "./db.js";
-import response from "./response.js";
-import request from "./request.js";
+import { ctxStorage } from "./context.js";
+import db from "./db.js";
+import { createResponse } from "./response.js";
+import { createRequest } from "./request.js";
 
 const SERVER_PORT = 3000;
 
-// await db.connect().then(() => console.log("Database connected!"));
-
-http
-  .createServer((req, res) => {
+function application() {
+  const server = http.createServer((req, res) => {
     try {
       const url = new URL(`http://localhost:${SERVER_PORT}${req.url}`);
 
       /** @type {HTTPContext} */
       const ctx = {
         data: null,
-        req: Object.create(request),
-        res: Object.create(response)
+        req: createRequest(req),
+        res: createResponse(res)
       };
 
-      ctx.req.req = req;
-      ctx.res.res = res;
-
-      httpStorage.run(ctx, () =>
+      ctxStorage.run(ctx, () =>
         routeHandler(url).then(() => {
           console.log(`${new Date().toISOString()} Request: ${url.pathname}`);
         })
@@ -33,7 +28,19 @@ http
     } catch (error) {
       console.error(error);
     }
-  })
-  .listen(SERVER_PORT, () => {
-    console.log(`Service ${packageJson.name} is running at port ${SERVER_PORT}.`);
   });
+
+  return {
+    /**
+     * @param {number} port
+     */
+    async run(port = 3000) {
+      await db.connect().then(() => console.log("Database connected!"));
+      server.listen(port, () => {
+        console.log(`Service ${packageJson.name} is running at port ${SERVER_PORT}.`);
+      });
+    }
+  };
+}
+
+application().run(SERVER_PORT);
diff --git a/package-lock.json b/package-lock.json
index 9ed64d6..c9f0ace 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,7 @@
       "dependencies": {
         "formidable": "^3.5.4",
         "mssql": "^12.2.0",
+        "serialize-error": "^13.0.1",
         "xlsx": "^0.18.5",
         "yup": "^1.7.1"
       },
@@ -1612,6 +1613,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/non-error": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/non-error/-/non-error-0.1.0.tgz",
+      "integrity": "sha512-TMB1uHiGsHRGv1uYclfhivcnf0/PdFp2pNqRxXjncaAsjYMoisaQJI+SSZCqRq+VliwRTC8tsMQfmrWjDMhkPQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -1839,6 +1852,37 @@
         "node": ">=10"
       }
     },
+    "node_modules/serialize-error": {
+      "version": "13.0.1",
+      "resolved": "https://registry.npmjs.org/serialize-error/-/serialize-error-13.0.1.tgz",
+      "integrity": "sha512-bBZaRwLH9PN5HbLCjPId4dP5bNGEtumcErgOX952IsvOhVPrm3/AeK1y0UHA/QaPG701eg0yEnOKsCOC6X/kaA==",
+      "license": "MIT",
+      "dependencies": {
+        "non-error": "^0.1.0",
+        "type-fest": "^5.4.1"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/serialize-error/node_modules/type-fest": {
+      "version": "5.4.4",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-5.4.4.tgz",
+      "integrity": "sha512-JnTrzGu+zPV3aXIUhnyWJj4z/wigMsdYajGLIYakqyOW1nPllzXEJee0QQbHj+CTIQtXGlAjuK0UY+2xTyjVAw==",
+      "license": "(MIT OR CC0-1.0)",
+      "dependencies": {
+        "tagged-tag": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -1905,6 +1949,18 @@
         "url": "https://opencollective.com/synckit"
       }
     },
+    "node_modules/tagged-tag": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/tagged-tag/-/tagged-tag-1.0.0.tgz",
+      "integrity": "sha512-yEFYrVhod+hdNyx7g5Bnkkb0G6si8HJurOoOEgC8B/O0uXLHlaey/65KRv6cuWBNhBgHKAROVpc7QyYqE5gFng==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/tarn": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/tarn/-/tarn-3.0.2.tgz",
diff --git a/package.json b/package.json
index 6195e2e..6cfda82 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
   "dependencies": {
     "formidable": "^3.5.4",
     "mssql": "^12.2.0",
+    "serialize-error": "^13.0.1",
     "xlsx": "^0.18.5",
     "yup": "^1.7.1"
   },
diff --git a/request.js b/request.js
index b82f654..3f90a9b 100644
--- a/request.js
+++ b/request.js
@@ -1,19 +1,29 @@
-/** @type {HTTPRequest} */
-export default {
-  req: null,
-  async parseJson() {
-    return new Promise((resolve, reject) => {
-      let body = [];
-      this.req.on("data", (chunk) => body.push(chunk));
-      this.req.on("end", () => {
-        try {
-          const parsedJson = JSON.parse(Buffer.concat(body).toString());
-          resolve(parsedJson);
-        } catch (error) {
-          reject(error);
-        }
+/**
+ * @param {import('node:http').IncomingMessage} req
+ * @returns {HTTPRequest}
+ */
+export function createRequest(req) {
+  return {
+    get req() {
+      return req;
+    },
+
+    async parseJson() {
+      return new Promise((resolve, reject) => {
+        /** @type {Buffer[]} */
+        const body = [];
+
+        this.req.on("data", (chunk) => body.push(chunk));
+        this.req.on("end", () => {
+          try {
+            const parsedJson = JSON.parse(Buffer.concat(body).toString());
+            resolve(parsedJson);
+          } catch (error) {
+            reject(error);
+          }
+        });
+        this.req.on("error", (err) => reject(err));
       });
-      this.req.on("error", (err) => reject(err));
-    });
-  }
-};
+    }
+  };
+}
diff --git a/response.js b/response.js
index ab044d0..8aec98b 100644
--- a/response.js
+++ b/response.js
@@ -1,14 +1,29 @@
-/** @type {HTTPResponse} */
-export default {
-  res: null,
-  sendJson(data, statusCode = 200) {
-    this.res.writeHead(statusCode, { "content-type": "application/json" });
-    return this.res.end(JSON.stringify(data, null, 2));
-  },
-  sendText(text, statusCode = 200) {
-    this.res.writeHead(statusCode, {
-      "content-type": "text/plain; charset=utf-8"
-    });
-    return this.res.end(text);
-  }
-};
+/**
+ * @param {import('node:http').ServerResponse} res
+ * @returns {HTTPResponse}
+ */
+export function createResponse(res) {
+  return {
+    get res() {
+      return res;
+    },
+
+    sendSSEJson(data, eventName) {
+      this.res.write(`event: ${eventName}\n`);
+      this.res.write(`data: ${JSON.stringify(data)}`);
+      this.res.write("\n\n");
+    },
+
+    sendJson(data, statusCode = 200) {
+      this.res.writeHead(statusCode, { "content-type": "application/json" });
+      return this.res.end(JSON.stringify(data, null, 2));
+    },
+
+    sendText(text, statusCode = 200) {
+      this.res.writeHead(statusCode, {
+        "content-type": "text/plain; charset=utf-8"
+      });
+      return this.res.end(text);
+    }
+  };
+}
diff --git a/router/index.js b/router/index.js
index 29590aa..fc1e6a5 100644
--- a/router/index.js
+++ b/router/index.js
@@ -1,7 +1,9 @@
 import path from "node:path";
 import formidable from "formidable";
-import { httpStorage } from "#root/context.js";
+import { ctxStorage } from "#root/context.js";
 import { handlers as reportsHandlers } from "./reports/index.js";
+import { BadRequestError, HttpError, NotFoundError } from "#root/errors/index.js";
+import { serializeError } from "serialize-error";
 
 /**
  * @type {HTTPRouteMap}
@@ -16,7 +18,7 @@ export const ROUTE_MAP = {
       filename: (_, ext) => `gpp-reports${ext}`,
       keepExtensions: true,
       uploadDir: path.join(process.cwd(), "./uploads"),
-      filter: ({ mimetype }) => mimetype && mimetype.includes("application/vnd.ms-excel")
+      filter: ({ mimetype }) => !!mimetype && mimetype.includes("application/vnd.ms-excel")
     })
   },
   "/api/reports_sync": {
@@ -30,7 +32,7 @@ export const ROUTE_MAP = {
  */
 export async function routeHandler(url) {
   /** @type {HTTPContext} */
-  const ctx = httpStorage.getStore();
+  const ctx = ctxStorage.getStore();
   const { req, res } = ctx;
 
   try {
@@ -42,28 +44,47 @@ export async function routeHandler(url) {
       }
 
       if (req.req.headers["content-type"]?.includes("multipart/form-data")) {
-        if (!route.incomingForm) throw new Error("Request cannot be processed without defined incoming form.");
+        if (!route.incomingForm) {
+          throw new BadRequestError("Request cannot be processed without defined incoming form.");
+        }
+
         ctx.data = await route.incomingForm.parse(req.req);
       }
 
       if (route.method === req.req.method) {
         await route.handle(ctx);
+        return;
       }
+    }
 
+    throw new NotFoundError("Route not found");
+  } catch (error) {
+    console.error(error);
+
+    if (error instanceof HttpError) {
+      res.sendJson(
+        {
+          error: {
+            name: error.name,
+            message: error.message || "Internal Server Error",
+            stack: error.stack || null
+          }
+        },
+        error.statusCode || 500
+      );
       return;
     }
 
-    res.sendJson({ error: { message: "Route not found." } }, 404);
-  } catch (error) {
-    console.error(error);
+    const serializedError = serializeError(error);
+
     res.sendJson(
       {
         error: {
-          message: error?.message || "Internal Server Error",
-          stack: error?.stack || null
+          ...serializedError,
+          stack: process.env.NODE_ENV !== "production" ? serializedError.stack : undefined
         }
       },
-      error?.cause?.statusCode || 500
+      500
     );
   }
 }
diff --git a/router/reports/parseExcel.handler.js b/router/reports/parseExcel.handler.js
index 797e26d..e4ae2bf 100644
--- a/router/reports/parseExcel.handler.js
+++ b/router/reports/parseExcel.handler.js
@@ -1,3 +1,5 @@
+import { BadRequestError } from "#root/errors/index.js";
+import db from "#root/db.js";
 import xlsx from "xlsx";
 
 const sheetName = "Отчеты";
@@ -12,18 +14,34 @@ const xlsxParseOptions = {
 };
 
 /**
- * Читает Excel файл отчетов и возвращает его в формате JSON
+ * URL: /api/reports_excel_file_parse
+ * Method: POST
+ * Description: Читает Excel файл отчетов и возвращает его в формате JSON. Принимает на вход файл
+ *              отчетов в формате Excel.
  *
  * @type {HTTPRouteHandler}
  */
 export default async (ctx) => {
   const { res } = ctx;
+
+  if (!ctx.data) throw new BadRequestError("Cannot proceed uploaded file");
+
   const [, files] = ctx.data;
   const excelFilePath = files?.report?.at(0)?.filepath;
 
   /** @type {{ markedReports: ReportModel[], reports: ReportModel[] }} */
   const ret = { reports: [], markedReports: [] };
 
+  let foundEqupments = 0;
+
+  ctx.res.res.setHeaders(
+    new Headers({
+      Connection: "keep-alive",
+      "Cache-Control": "no-cache",
+      "Content-Type": "text/event-stream"
+    })
+  );
+
   if (excelFilePath) {
     const workbook = xlsx.readFile(excelFilePath, xlsxParseOptions);
     const sheet = workbook.Sheets[sheetName];
@@ -63,11 +81,29 @@ export default async (ctx) => {
         executorNames: parseNames(data[i][cols[4]])
       });
     }
+
+    /** @param {ReportModel} report */
+    const checkReportAssigments = async (report) => {
+      const equipment = await db
+        .request()
+        .query(`select id, name from dbo.asu_system_api_subsystemlist where name like N'%${report.equipment}%';`);
+
+      if (equipment.recordset.length !== 0) foundEqupments++;
+
+      res.sendSSEJson(report, "reportParseProgress");
+
+      return equipment;
+    };
+
+    console.log("Total reports:", ret.reports.concat(ret.markedReports).length);
+    await Promise.allSettled(ret.reports.concat(ret.markedReports).map((r) => checkReportAssigments(r)));
+    ctx.res.sendSSEJson({ foundEqupments }, "reportParseDone");
+    console.log("Parse done");
   } else {
-    throw new Error("Bad request", { cause: { statusCode: 400 } });
+    throw new BadRequestError();
   }
 
-  res.sendJson({ data: ret });
+  res.res.end();
 };
 
 function parseReasonCallAndJobDesc(str = "") {