replace bufio.Scanner with bufio.Reader and add error handling

[hgodalan]

Replace the reading function to support large message transfers. #61

Summary by CodeRabbit

• Refactor
  • Improved the processing of live event streams for enhanced stability and smoother overall performance.
  • Enhanced error handling to ensure that updates are consistently and reliably delivered to users.

[coderabbitai]

Walkthrough

This pull request modifies the readSSE method in the SSE client implementation. The method now uses a bufio.Reader with ReadString instead of a bufio.Scanner for reading incoming lines, which affects how input is processed. Enhanced error handling distinguishes between io.EOF and other errors, examining a termination signal via a done channel. Newline characters are explicitly trimmed using strings.TrimRight, while the underlying event extraction logic remains largely unchanged. There are no changes to exported or public entities.

Changes

File	Change Summary
client/sse.go	Updated readSSE method: switched from bufio.Scanner to bufio.Reader with ReadString for reading lines, added explicit newline trimming, and enhanced error handling logic.

Possibly related issues

• Can't handle large messages through SSE stream #61: The modifications, including the shift to bufio.Reader and improved error handling, directly address issues related to handling large messages as noted in the issue.

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

client/sse.go (1)

102-143: Strong improvement to handle large messages with robust error handling.

The replacement of bufio.Scanner with bufio.Reader successfully addresses the issue of supporting large message transfers (issue #61). The Scanner had an internal buffer size limit (default 64KB), while Reader with ReadString doesn't have this limitation.

The error handling is also significantly improved:

1. Proper EOF detection with pending event processing
2. Explicit channel termination check
3. Comprehensive error reporting

One minor suggestion for optimization:

-    br := bufio.NewReader(reader)
+    // Use a larger buffer size for better performance with large messages
+    br := bufio.NewReaderSize(reader, 16*1024) // 16KB buffer instead of default 4KB

This would improve performance when working with large messages by reducing the number of small reads from the underlying reader.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 771de1d and 004e42f.

📒 Files selected for processing (1)

• client/sse.go (1 hunks)

🧰 Additional context used

🧬 Code Definitions (1)

client/sse.go (1)

client/stdio.go (16) (16)

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