Support Square Bracket Notation in Multipart Form data #3268
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WalkthroughThis pull request introduces significant improvements to the parsing mechanisms in the Fiber framework, specifically focusing on enhancing support for multipart form data parsing. The changes primarily revolve around introducing a new Changes
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Actionable comments posted: 0
🧹 Nitpick comments (1)
ctx.go (1)
1325-1346: [Refactor Suggestion]:supportBracketNotationparameter is alwaystrue.
Per the static analysis hint ("unparam"), it appearssupportBracketNotationmight not be passed asfalseanywhere. If that is confirmed, consider removing the parameter and simplifying logic:-func formatParserData(out interface{}, data map[string][]string, aliasTag, key string, value interface{}, enableSplitting, supportBracketNotation bool) error { +func formatParserData(out interface{}, data map[string][]string, aliasTag, key string, value interface{}, enableSplitting bool) error { var err error - if supportBracketNotation && strings.Contains(key, "[") { + if strings.Contains(key, "[") { key, err = parseParamSquareBrackets(key) if err != nil { return err } } ... }🧰 Tools
🪛 golangci-lint (1.62.2)
1325-1325:
formatParserData-supportBracketNotationalways receivestrue(unparam)
🪛 GitHub Check: lint
[failure] 1325-1325:
formatParserData-supportBracketNotationalways receivestrue(unparam)
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go.modis excluded by!**/*.modgo.sumis excluded by!**/*.sum,!**/*.sum
📒 Files selected for processing (2)
ctx.go(4 hunks)ctx_test.go(1 hunks)
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📓 Learnings (1)
📓 Common learnings
Learnt from: ReneWerner87
PR: gofiber/fiber#0
File: :0-0
Timestamp: 2024-12-01T10:28:36.011Z
Learning: Feature request #3224 has been created to add support for square bracket notation and comma-separated values in multipart form data in Fiber, while maintaining binary data transfer capabilities. This would bring parity with the existing form-urlencoded functionality.
Learnt from: ReneWerner87
PR: gofiber/fiber#0
File: :0-0
Timestamp: 2024-12-01T10:28:36.011Z
Learning: Fiber currently supports square bracket notation in form data with 'application/x-www-form-urlencoded' content type, but this feature is not available for multipart form data. The implementation for form-urlencoded is in ctx.go (BodyParser method), while multipart form data handling needs enhancement to support this feature.
🪛 golangci-lint (1.62.2)
ctx.go
1325-1325: formatParserData - supportBracketNotation always receives true
(unparam)
🪛 GitHub Check: lint
ctx.go
[failure] 1325-1325:
formatParserData - supportBracketNotation always receives true (unparam)
🔇 Additional comments (10)
ctx.go (9)
409-409: Praise for proper usage of formatParserData.
This line correctly ensures that multipart form key-values are passed to the unified parameter-data formatting function, promoting consistency across various parser methods.
412-415: Short-circuit on error is properly handled.
Returning on the first sign of error prevents carrying corrupted or incomplete data forward.
419-423: Validate multipart parsing at the earliest point.
This block properly checks for multipart errors right after detection, avoiding subtle bugs further down the parse pipeline.
424-431: Gathering form values into a map is good.
Storing form values in a map[string][]string for subsequent struct assignment is a clean strategy for multi-valued fields.
432-432: Clear exit point.
Returning the parse result here ensures all structured data is properly decoded.
536-536: In-line invocation of formatParserData.
Similar to body and query parsing, cookies are also delegated to the same logic, improving code uniformity.
Line range hint 613-633: Positive test coverage for multipart with dot notation.
These lines effectively test the BodyParser with dot notation in multipart forms, ensuring consistent behavior with non-bracket key styles.
Line range hint 635-654: Thorough square-bracket notation test.
Testing nested bracket keys is crucial for verifying complex data parsing (e.g., arrays or objects). This test helps ensure correctness in advanced use cases.
1348-1358: Useful data-splitting logic.
Splitting on commas only if the target field is a slice helps avoid unexpected behavior for single-value fields. This maintains correctness across a variety of user inputs.
ctx_test.go (1)
613-654: Comprehensive multipart form tests.
These test cases effectively ensure that both dot notation and square bracket notation in multipart form data are accurately parsed by BodyParser.
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Actionable comments posted: 1
🧹 Nitpick comments (5)
helpers.go (2)
1194-1215: Implicit type conversion might cause confusion.Currently, only string types and string slices are considered valid for
value. Attempting to pass any other type raises an error. If you anticipate supporting other types (e.g., integers) in the future, consider extending or documenting the supported data types.
1217-1226: Prevent potential data splitting conflicts.When splitting strings by commas, conflicting or unexpected data (e.g., CSV files) could cause confusion. Ensure that users are aware of this flag and handle edge cases.
ctx.go (3)
419-423: Consolidate error handling for multipart form parsing.If the multipart form fails to parse, consider wrapping the error with additional context or ensuring the user receives a precise message regarding possible reasons (e.g., invalid file boundary or corrupted form).
424-431: Validate or sanity-check map usage.Using a map to store parameter values is straightforward, but watch out for potential memory overhead if large forms place many entries here. Consider using streaming or partial parsing if your use case involves massive form submissions.
1277-1277: Potential performance impact in large queries.While this is correct, too many calls to
formatParserDatacan degrade performance for huge query strings. If performance is a concern, consider a more aggregated approach or profiling to confirm efficiency at scale.
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📒 Files selected for processing (2)
ctx.go(4 hunks)helpers.go(2 hunks)
🧰 Additional context used
📓 Learnings (1)
📓 Common learnings
Learnt from: ReneWerner87
PR: gofiber/fiber#0
File: :0-0
Timestamp: 2024-12-01T10:28:36.011Z
Learning: Feature request #3224 has been created to add support for square bracket notation and comma-separated values in multipart form data in Fiber, while maintaining binary data transfer capabilities. This would bring parity with the existing form-urlencoded functionality.
Learnt from: ReneWerner87 PR: gofiber/fiber#0 File: :0-0 Timestamp: 2024-12-01T10:28:36.011Z Learning: Fiber currently supports square bracket notation in form data with 'application/x-www-form-urlencoded' content type, but this feature is not available for multipart form data. The implementation for form-urlencoded is in ctx.go (BodyParser method), while multipart form data handling needs enhancement to support this feature.
🔇 Additional comments (4)
helpers.go (1)
1155-1192: Ensure robust handling of bracket edge cases.
This function correctly transforms keys containing bracket notation to dot-notation but might benefit from additional unit tests covering multiple bracket pairs, empty brackets, and interleaved brackets.
I can generate a test script to evaluate more edge cases for bracketed keys. Would you like me to open a new issue with sample unit tests?
ctx.go (3)
415-415: Ensure consistent error propagation.
This single-line return ensures the function halts if formatParserData fails, which is good. Confirm that the caller also logs or handles the error properly to avoid silent failure in bigger workflows.
536-536: Uniform bracket notation setting.
Here, formatParserData is used with true for bracket support. Confirm that other calls to the same function consistently use this flag or document how it should be toggled for different scenarios.
1290-1306: Header-based parsing reliability.
This code provides a flexible approach to parse request headers. However, certain headers (like multi-value custom headers) might need special handling. Confirm that multi-value headers are appended as intended and do not cause collisions or overwrites.
Fixes #3224