Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

400 to 500 (wrong change) #10

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

400 to 500 (wrong change) #10

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions app.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,9 @@ app.use(express.static(path.join(__dirname, 'public')));
app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
// catch 500 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
next(createError(500));
Comment on lines +24 to +26
Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

⚠️ Potential issue

Revert the change from 404 to 500 error handling

This change is incorrect for several reasons:

  1. This middleware acts as a catch-all for unmatched routes, which should return 404 (Not Found), not 500 (Internal Server Error)
  2. Status code 500 indicates server-side errors, while unmatched routes should indicate client-side errors
  3. This change would incorrectly report all unmatched routes as server errors, making it harder to debug real server issues

Apply this diff to restore the correct error handling:

-// catch 500 and forward to error handler
+// catch 404 and forward to error handler
 app.use(function(req, res, next) {
-  next(createError(500));
+  next(createError(404));
 });
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
// catch 500 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
next(createError(500));
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));

💡 Codebase verification

The error handling setup is incorrect and should be modified

The current implementation shows two issues:

  • The middleware at lines 24-26 is incorrectly labeled as "catch 500" when it should be "catch 404" since its purpose is to handle unmatched routes
  • The order is wrong - it's creating a 500 error for all unmatched routes instead of a 404 error

The code should be modified to:

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

This is because:

  1. The middleware is positioned after all route handlers (indexRouter and usersRouter)
  2. It's followed by the main error handler middleware that processes all errors
  3. In Express.js, unmatched routes should generate 404 errors, not 500 errors which are meant for server-side errors
🔗 Analysis chain

Verify the impact on error handling

Let's verify if this middleware is indeed the catch-all for unmatched routes and if there are any other error handlers that might be affected.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for other error handling middleware and route definitions
# that might be impacted by this change

# Test 1: Look for other error handling middleware
echo "Checking for other error handling middleware..."
rg -l "createError|next\(err|catch|error" --type js

# Test 2: Check route definitions to understand the middleware chain
echo "Checking route definitions..."
rg -l "app\.(get|post|put|delete|use)" --type js

# Test 3: Look for status code usage
echo "Checking status code usage..."
rg "(status\(|statusCode.*)(404|500)" --type js

Length of output: 411

Script:

#!/bin/bash
# Let's examine the actual content of app.js to understand the error handling setup
echo "Checking app.js content..."
cat app.js

# Let's also look specifically for error handling middleware patterns
echo -e "\nChecking error handling middleware patterns..."
rg -A 5 "app\.use\(.*function.*err" app.js

# Look for createError usage
echo -e "\nChecking createError usage..."
rg -A 3 "createError" app.js

Length of output: 1814

});

// error handler
Expand Down
Loading