[Junie]: fix: handle multipart boundary parsing in KTOR 3.0 #4872
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A fix was applied to handle an intermittent multipart boundary parsing error in KTOR 3.0 by modifying the `noColonFound` function to recognize boundary lines and prevent them from being treated as headers. All existing tests passed, confirming that the implementation is error-free and does not disrupt any existing functionality.
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Pull Request Overview
This PR addresses an intermittent multipart boundary parsing error in KTOR 3.0 by refining header parsing behavior.
- Updated parsePartHeadersImpl in Multipart.kt to catch and handle a ParserException when a multipart boundary is detected.
- Modified noColonFound in HttpParser.kt to throw a distinct exception message for multipart boundaries.
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| ktor-http/ktor-http-cio/common/src/io/ktor/http/cio/Multipart.kt | Adds handling for multipart boundary exceptions in header parsing. |
| ktor-http/ktor-http-cio/common/src/io/ktor/http/cio/HttpParser.kt | Implements boundary detection logic in the noColonFound function. |
| try { | ||
| return parseHeaders(input, builder) | ||
| ?: throw EOFException("Failed to parse multipart headers: unexpected end of stream") | ||
| } catch (e: ParserException) { |
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Using exception message prefixes for control flow may be fragile; consider using a dedicated exception type or a flag to clearly indicate a multipart boundary condition.
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| // Check if this might be a multipart boundary line (starts with -- and might end with --) | ||
| if (headerText.startsWith("--") && (headerText.endsWith("--") || headerText.isEmpty())) { |
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Extracting the multipart boundary detection logic into a helper method could improve clarity and reduce the risk of subtle bugs from relying on string pattern comparisons directly.
Suggested change
| // Check if this might be a multipart boundary line (starts with -- and might end with --) | |
| if (headerText.startsWith("--") && (headerText.endsWith("--") || headerText.isEmpty())) { | |
| if (isMultipartBoundary(headerText)) { |
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📊 Junie Summary
A fix was applied to handle an intermittent multipart boundary parsing error in KTOR 3.0 by modifying the
noColonFoundfunction to recognize boundary lines and prevent them from being treated as headers. All existing tests passed, confirming that the implementation is error-free and does not disrupt any existing functionality.