Error handler/backend #89
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WalkthroughA new logging utility has been introduced in the backend of the application, utilizing the Changes
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (17)
backend/routes/feedbackRouter.js (1)
13-16: LGTM! Consider adding request details to the log.The enhanced error logging significantly improves error traceability. Great job!
To further improve debugging, consider including relevant request details in the log:
logger.error("Error fetching API info:", { message: error.message, stack: error.stack, + method: req.method, + url: req.originalUrl, });backend/middlewares/errrorMiddleware.js (3)
1-4: LGTM! Consider adding a type check for the error object.The import and function declaration look good and align with Express.js conventions. To improve error handling consistency, consider adding a type check for the
errparameter.You could add a type check like this:
function errorMiddleware(err, req, res, next) { + const error = err instanceof Error ? err : new Error(err); // Rest of the function... }This ensures that
erris always an Error object, improving consistency in error handling.
13-18: LGTM! Consider adding more details in development mode.The error response logic is well-structured and follows good practices. To further improve debugging in development environments, consider adding more details to the error response.
You could modify the response to include more details in development mode:
+ const isDevelopment = process.env.NODE_ENV === 'development'; + res.status(err.status || 500).json({ success: false, message: err.message || "An unexpected error occurred.", + ...(isDevelopment && { + stack: err.stack, + details: err + }) });This change would provide more detailed error information in development environments while keeping production responses concise.
1-20: Overall, good implementation with room for minor improvements.This new error middleware aligns well with the PR objectives of enhancing error logging and improving error visibility. The implementation provides a solid foundation for consistent error handling across the application.
To fully realize the benefits of this middleware:
- Implement the suggested improvements, particularly around secure logging practices.
- Ensure this middleware is properly integrated into your Express application setup.
- Consider adding unit tests to verify the behavior of this middleware under various error conditions.
To integrate this middleware, add it after all your routes in your main application file:
const express = require('express'); const errorMiddleware = require('./middlewares/errorMiddleware'); const app = express(); // ... your routes and other middleware ... app.use(errorMiddleware);This ensures that any unhandled errors in your routes will be caught and processed by this middleware.
backend/config/logger.js (4)
2-2: Consider specifying Winston version in package.jsonThe Winston library is correctly imported. However, to ensure consistency across different environments and prevent potential issues with API changes, it's recommended to specify the exact version of Winston in your
package.jsonfile.Add a specific version for Winston in your
package.json:{ "dependencies": { "winston": "^3.8.2" } }Replace
3.8.2with the version you're currently using.
6-14: Logging format is comprehensive, consider handling circular referencesThe logging format is well-structured and includes essential information such as timestamp, log level, message, stack trace, and error details. The use of colorization will help in quickly identifying different log levels.
However, be cautious about using
JSON.stringify(errors)as it may throw an exception iferrorscontains circular references.Consider using a safe stringification method to handle potential circular references:
const safeStringify = (obj) => { const cache = new Set(); return JSON.stringify(obj, (key, value) => { if (typeof value === 'object' && value !== null) { if (cache.has(value)) { return '[Circular]'; } cache.add(value); } return value; }); }; // Then use it in your format: ${errors ? `\nErrors: ${safeStringify(errors)}` : ""}
15-18: Consider specifying a full path for error log fileThe use of both console and file transports is excellent. Logging only errors to a file is a good practice for focusing on critical issues.
Consider specifying a full path for the "error.log" file to ensure it's created in the desired location, regardless of where the application is run from:
const path = require('path'); // ... new winston.transports.File({ filename: path.join(__dirname, '..', 'logs', 'error.log'), level: 'error' }),This assumes a 'logs' directory at the root of your backend. Adjust the path as needed for your project structure.
1-21: Overall, excellent implementation of centralized loggingThis logger configuration aligns well with the PR objectives of enhancing error logging in the backend. It provides a centralized, well-structured logging utility that can be easily used across all routes and controllers. The comprehensive logging format, including timestamps, log levels, messages, stack traces, and error details, will significantly improve error visibility and traceability.
The use of both console and file transports, with errors specifically logged to a file, will aid in monitoring and debugging. This implementation will contribute to better code readability, maintainability, and debugging capabilities across the application.
To further enhance this logging setup, consider:
- Implementing log rotation to manage log file sizes over time.
- Adding environment-specific configurations (e.g., more verbose logging in development).
- Integrating with a centralized logging service for production environments.
backend/routes/index.js (3)
3-3: LGTM! Consider using destructuring import.The addition of the Winston logger import aligns well with the PR objectives of enhancing error logging. Good job on keeping the logger configuration separate.
For consistency with modern JavaScript practices, consider using a destructuring import:
-const logger = require("../config/logger"); +const { logger } = require("../config/logger");This assumes that the logger is exported as a named export in the config file. If it's the default export, the current import is correct.
11-11: LGTM! Consider adding error details to the log.The switch from
console.errorto the Winston logger is a great improvement and aligns with the PR objectives.To further enhance error traceability, consider including more error details in the log:
-logger.error("Error loading feedbackRouter:", error); +logger.error("Error loading feedbackRouter:", { error: error.message, stack: error.stack });This will provide more context for debugging, especially for stack traces.
12-17: LGTM! Consider logging the error occurrence.The modification to remove the unused 'next' parameter is appropriate. The generic error message is suitable for client-facing responses.
Consider logging this error occurrence to track how often the feedback functionality is unavailable:
feedbackRouter = (req, res) => { + logger.error("Feedback functionality unavailable"); res .status(500) .json({ error: "Feedback functionality is currently unavailable" }); };This will help in monitoring the frequency of this issue.
backend/index.js (1)
38-41: LGTM: Health check endpoint added.The new health check endpoint is a valuable addition for monitoring server status. It aligns with best practices for system observability.
Consider enhancing the health check to include more detailed information, such as database connectivity status:
app.get("/health", (req, res) => { - res.status(200).json({ status: "OK" }); + res.status(200).json({ + status: "OK", + dbStatus: mongoose.connection.readyState === 1 ? "Connected" : "Disconnected" + }); });backend/controller/reservation.controller.js (3)
17-20: LGTM: Validation error logging added.The new logging for validation errors aligns well with the PR objectives. It captures both the validation errors and the request body, providing comprehensive context for debugging.
Consider adding a unique identifier or request ID to the log entry. This will help correlate log entries across different parts of the request lifecycle. For example:
logger.error("Validation error:", { requestId: req.id, // Assuming you have middleware that adds a unique ID to each request errors: validationResult.error.errors, body: req.body, });
36-41: LGTM: Runtime error logging added with minor suggestions.The new logging for runtime errors aligns well with the PR objectives. It captures the error message, stack trace, and request body, providing comprehensive context for debugging.
Consider the following minor improvements:
- Add a unique identifier or request ID to the log entry, similar to the suggestion for validation error logging.
- Remove the extra blank line (line 41) for consistency.
- Consider sanitizing sensitive information from the request body before logging.
Here's an example of how you might implement these suggestions:
logger.error("Error creating reservation:", { requestId: req.id, message: error.message, stack: error.stack, body: sanitizeRequestBody(req.body), // Implement this function to remove sensitive data });
Line range hint
1-52: Overall assessment: Good implementation with room for refactoring.The changes in this file successfully implement improved error logging as per the PR objectives. The core logic remains unchanged, and the API contract is maintained. Good job on enhancing the error visibility and traceability!
Consider refactoring the error logging into a separate function for better reusability across different controllers. This could help maintain consistency in error logging across the application. Here's a suggestion:
function logError(logger, message, error, req) { logger.error(message, { requestId: req.id, message: error.message, stack: error.stack, body: sanitizeRequestBody(req.body), }); } // Usage in createReservation: if (!validationResult.success) { logError(logger, "Validation error:", validationResult.error, req); // ... rest of the code } // In the catch block: logError(logger, "Error creating reservation:", error, req);This refactoring would make it easier to maintain consistent error logging across different parts of your application.
backend/controller/feedback.controller.js (2)
17-20: Improve logging security and maintain consistent indentation.The structured logging for validation errors is a great improvement. However, consider the following suggestions:
- Be cautious about logging the entire request body, as it may contain sensitive information. Consider logging only non-sensitive fields or masking sensitive data.
- The indentation of the logging statement is inconsistent with the surrounding code. Adjust it to match the code style of the file.
Here's a suggested improvement:
- logger.error("Validation error:", { - errors: validationResult.error.errors, // Log the detailed validation errors - body: req.body, // Optionally log the request body for context - }); // Use logger for validation errors + logger.error("Validation error:", { + errors: validationResult.error.errors, + body: { + name: req.body.name, + email: "***@***.com", // Mask email for privacy + }, + });
36-36: LGTM: Error logging improved. Consider adding more context.The replacement of console.error with logger.error is a good improvement, aligning with the PR objectives. To further enhance error traceability, consider including more context in the error log.
Here's a suggested enhancement:
- logger.error("Error creating feedback:", error); // Log the error using Winston + logger.error("Error creating feedback:", { + error: error.message, + stack: error.stack, + body: { + name: req.body.name, + email: "***@***.com", // Mask email for privacy + }, + });This change would provide more detailed information for debugging while still protecting sensitive data.
📜 Review details
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📒 Files selected for processing (8)
- backend/config/logger.js (1 hunks)
- backend/controller/feedback.controller.js (4 hunks)
- backend/controller/reservation.controller.js (3 hunks)
- backend/index.js (2 hunks)
- backend/middlewares/errrorMiddleware.js (1 hunks)
- backend/package.json (1 hunks)
- backend/routes/feedbackRouter.js (1 hunks)
- backend/routes/index.js (1 hunks)
🔇 Additional comments (18)
backend/package.json (1)
20-20: LGTM: Winston dependency added correctly.The addition of Winston (version ^3.14.2) as a dependency aligns well with the PR objectives to enhance error logging in the backend. This is a positive change that will contribute to improved error visibility and traceability.
Let's verify the usage of Winston in the codebase:
This script will help us confirm that Winston is being properly imported, configured, and used throughout the backend code.
✅ Verification successful
Verified: Winston is correctly integrated and utilized throughout the backend codebase.
The shell script results confirm that Winston is properly imported, configured, and its logging methods are actively used across multiple backend files. This aligns with the PR objective to enhance error logging.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the import and usage of Winston in the backend code. # Test 1: Check for Winston import statements echo "Checking for Winston imports:" rg --type js 'import.*winston' backend # Test 2: Check for Winston logger configuration echo "Checking for Winston logger configuration:" rg --type js 'winston\.createLogger' backend # Test 3: Check for usage of Winston logging methods echo "Checking for Winston logging usage:" rg --type js '(logger|winston)\.(info|error|warn|debug)' backendLength of output: 1434
backend/routes/feedbackRouter.js (3)
5-5: LGTM! Good addition for centralized logging.The introduction of a centralized logger aligns well with the PR's objective of enhancing error logging and visibility.
Line range hint
1-21: Great improvements to error handling and code structure!The changes in this file effectively address the PR objectives by enhancing error logging and improving code structure. The use of a centralized logger and modern JavaScript practices contributes to better maintainability and error traceability.
2-2: LGTM! Consider verifying other imports.The updated import statement using destructuring is a good practice and improves code readability.
To ensure consistency across the codebase, please verify other imports from the feedback controller:
✅ Verification successful
Verified: All imports from
feedback.controllerare using destructuring.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check for other imports from the feedback controller # Expected result: All imports should use destructuring rg --type js "require\(.*feedback\.controller.*\)" ./backendLength of output: 170
backend/middlewares/errrorMiddleware.js (2)
20-20: LGTM! Correct module export.The errorMiddleware function is correctly exported, allowing it to be used in other parts of the application.
5-11: 🛠️ Refactor suggestion
⚠️ Potential issueImprove error logging for better traceability and security.
The error logging implementation aligns well with the PR objectives. However, there are a few areas for improvement:
- The stack trace is incorrectly set to
req.bodyinstead oferr.stack.- Logging the entire request body might expose sensitive information.
Please apply the following changes:
logger.error(err.message, { - stack: req.body, // Include stack trace + stack: err.stack, // Correct stack trace url: req.originalUrl, // Request URL method: req.method, // HTTP method - body: req.body, // Request body + body: sanitizeRequestBody(req.body), // Sanitized request body });Implement a
sanitizeRequestBodyfunction to remove or mask sensitive information before logging. This function should strip out passwords, tokens, and other sensitive data.To ensure we're not logging sensitive information elsewhere, let's check for other instances of logging request bodies:
backend/config/logger.js (2)
4-5: Logger configuration looks goodThe logger is correctly configured using
winston.createLogger(). Setting the default logging level to "info" is a good choice, as it provides a balance between informative logging and avoiding excessive verbosity.
21-21: Module export is correctThe logger instance is correctly exported, allowing for easy import and use in other parts of the application. This follows good Node.js module practices.
backend/routes/index.js (2)
28-28: LGTM! Documentation update is helpful.The addition of the feedback endpoint to the API documentation is a good practice. It improves API discoverability and keeps the documentation up-to-date with the available endpoints.
Line range hint
1-34: Overall, great improvements to error handling and logging!The changes in this file align well with the PR objectives of enhancing error logging and visibility. The implementation of the Winston logger and the improvements in error handling are consistent and well-executed. The code maintains good practices and improves the overall robustness of the application.
A few minor suggestions were made to further enhance logging and code quality, but these are not critical. Great job on improving the error handling and documentation!
backend/index.js (5)
4-6: LGTM: New imports align with PR objectives.The addition of the logger and error middleware imports directly supports the PR's goal of enhancing error logging and handling. The separate dotenv import improves code clarity.
8-8: LGTM: Improved dotenv configuration.Separating the dotenv configuration improves code readability and ensures environment variables are loaded before use.
28-28: LGTM: Enhanced MongoDB connection logging.Replacing console.log with logger calls improves error visibility and traceability. The structured logging will make it easier to track and analyze connection issues, aligning well with the PR objectives.
Also applies to: 31-31
47-47: LGTM: Consistent logging for server start.Using the logger for the server start message maintains consistency in logging practices throughout the application.
Line range hint
1-50: Overall: Excellent improvements to logging and error handling.The changes in this file significantly enhance the application's logging capabilities and error handling, directly addressing the PR objectives. The addition of structured logging, centralized error handling, and a health check endpoint collectively improve the application's observability and maintainability.
Key improvements:
- Structured logging with Winston
- Centralized error handling middleware
- Health check endpoint for improved monitoring
- Consistent use of logger throughout the file
These changes will greatly facilitate debugging and monitoring of the application, aligning perfectly with the PR's goals.
backend/controller/reservation.controller.js (1)
3-3: LGTM: Logger import added correctly.The addition of the logger import aligns with the PR objective of enhancing error logging. The import statement is correctly placed and follows common practices.
backend/controller/feedback.controller.js (2)
3-3: LGTM: Logger import added correctly.The logger import has been added appropriately at the top of the file. This is a good practice for centralizing the logging configuration.
Line range hint
1-48: Summary: Good improvements in error logging with minor suggestions.Overall, the changes in this file align well with the PR objectives of enhancing error logging. The introduction of structured logging using Winston is a significant improvement over console.error. Here's a summary of the review:
- The logger import is correctly implemented.
- Validation error logging has been greatly improved, with a suggestion to mask sensitive data.
- There's a question about changing 'errors' to 'stack' in the response JSON.
- Error logging in the catch block has been improved, with a suggestion to add more context.
These changes will contribute to better error traceability and easier debugging. Once the minor suggestions are addressed, this implementation will significantly enhance the error handling capabilities of the feedback controller.
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@RamakrushnaBiswal , can you merge this pr? |
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@samar12-rad LGTM 🚀 |
RamakrushnaBiswal
merged commit bd44e24
into
RamakrushnaBiswal:main
RamakrushnaBiswal
added
enhancement
This PR implements a comprehensive enhancement of error logging throughout the backend of the café website. By integrating Winston for structured logging, we improve the visibility and traceability of errors, facilitating easier debugging and monitoring.
@RamakrushnaBiswal, for the issue #72
Changes Made:
Integrated Winston Logger:
Replaced console error logging with structured logging using Winston across all routes and controllers.
Added detailed logging for validation errors and runtime exceptions, including relevant request data and error stack traces.
Created .error.log:
Created a file to log all the errrors and store them with proper timestamps for enhanced analyzing of backend.
Updated Feedback Controller:
Enhanced the createFeedback function to log validation and runtime errors with detailed information for better context.
Updated Reservation Controller:
Enhanced the createReservation function to log detailed validation and runtime errors.
Updated Feedback Router:
Improved error handling in the feedback router, logging any internal server errors when fetching API information.
Consistent Error Handling:
Ensured consistent error handling and logging practices across all controllers and routers, making it easier to identify issues in different parts of the application.
Benefits:
Improved Debugging: With structured logging, developers can quickly identify the source of issues and understand the context in which they occur.
Enhanced Monitoring: The new logging setup provides better insights into application performance and error patterns, aiding in proactive maintenance.
Consistency: Establishing a uniform approach to error handling and logging enhances code readability and maintainability.
Summary by CodeRabbit
Release Notes
New Features
Bug Fixes
Documentation
Chores
winstonas a new dependency for logging enhancements.