fix: change from WS to SSE #1780
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Sequence Diagram(s)sequenceDiagram
participant Client
participant Server
participant SSE Module
Client->>Server: Connect to /events
Server->>SSE Module: Add client
SSE Module-->>Client: Stream established
SSE Module->>Client: NotifyClients(new donation)
Client-->>SSE Module: Acknowledge
sequenceDiagram
participant Client
participant Server
participant SSE Module
Client->>Server: Connect to /events
Server->>SSE Module: Add client
SSE Module-->>Client: Stream established
SSE Module->>Client: NotifyDonationFailed(failed donation)
Client-->>SSE Module: Acknowledge
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Actionable comments posted: 1
Outside diff range, codebase verification and nitpick comments (2)
src/services/cronJobs/checkQRTransactionJob.ts (1)
186-191: Add Error Handling tonotifyClientsFunctionThe
notifyClientsfunction currently lacks error handling, which could lead to unhandled exceptions during client write operations. Consider adding try-catch blocks or other error management strategies to ensure the function handles errors gracefully and does not disrupt the flow ofcheckTransactions.
- Location:
src/services/sse/sse.tsAnalysis chain
Review the usage of
notifyClientsfunction.The function
notifyClientsis used correctly to send notifications about new donations. The parameters passed (typeanddata) are appropriate for the context of the notification.However, ensure that the
notifyClientsfunction handles errors gracefully and does not throw unhandled exceptions that could disrupt the flow ofcheckTransactions.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify error handling in `notifyClients` function. # Test: Search for error handling in `notifyClients`. Expect: Error handling mechanisms. rg --type typescript -A 5 $'notifyClients'Length of output: 76
Script:
#!/bin/bash # Description: Verify error handling in `notifyClients` function. # Corrected Test: Search for error handling in `notifyClients`. Expect: Error handling mechanisms. rg --type ts -A 5 $'notifyClients'Length of output: 1360
src/resolvers/draftDonationResolver.ts (1)
423-428: Lack of Error Handling innotifyDonationFailedFunctionThe
notifyDonationFailedfunction does not include error handling, which could lead to unhandled exceptions if writing to a client fails. Consider adding error handling to ensure robustness and prevent disruptions in the flow ofmarkDraftDonationAsFailed.
- Location:
src/services/sse/sse.ts, lines 43-45Analysis chain
Review the usage of
notifyDonationFailedfunction.The function
notifyDonationFailedis used correctly to send notifications about failed draft donations. The parameters passed (typeanddata) are appropriate for the context of the notification.However, ensure that the
notifyDonationFailedfunction handles errors gracefully and does not throw unhandled exceptions that could disrupt the flow ofmarkDraftDonationAsFailed.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify error handling in `notifyDonationFailed` function. # Test: Search for error handling in `notifyDonationFailed`. Expect: Error handling mechanisms. rg --type typescript -A 5 $'notifyDonationFailed'Length of output: 83
Script:
#!/bin/bash # Search for the implementation of `notifyDonationFailed` function and check for error handling. ast-grep --lang typescript --pattern 'function notifyDonationFailed($_) { $$$ }'Length of output: 314
| // Add a new client to the SSE stream | ||
| export function addClient(res: Response) { | ||
| res.setHeader('Access-Control-Allow-Origin', '*'); | ||
| res.setHeader('Content-Type', 'text/event-stream'); | ||
| res.setHeader('Cache-Control', 'no-cache'); | ||
| res.setHeader('Connection', 'keep-alive'); | ||
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| res.flushHeaders(); | ||
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| clients.push(res); | ||
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| // Remove the client on disconnect | ||
| res.on('close', () => { | ||
| clients = clients.filter(client => client !== res); | ||
| }); | ||
| } |
There was a problem hiding this comment.
Add client function is mostly correct, consider concurrency control.
The function correctly sets SSE headers and manages client disconnections. However, consider using concurrency control mechanisms for the clients array to avoid potential issues in a multi-threaded environment.
Summary by CodeRabbit
New Features
Bug Fixes
Documentation