Add validator for multipart forms

[boba-keyost]

No description provided.

[llamapreview]

Auto Pull Request Review from LlamaPReview

1. Overview

1.1 Core Changes

• Primary purpose and scope: Add validation support for multipart forms in OpenAPI 3.1
• Key components modified: openapi31/walk_schema.go
• Cross-component impacts: None identified
• Business value alignment: Enables proper documentation of file upload endpoints

1.2 Technical Architecture

• System design modifications: Extends existing form validation to include multipart forms
• Component interaction changes: None
• Integration points impact: None
• Dependency changes and implications: None

2. Critical Findings

2.1 Must Fix (P0🔴)

Issue: Missing mimeMultipart constant definition

• Analysis Confidence: High
• Impact: Compilation failure or runtime panic
• Resolution: Define mimeMultipart constant as "multipart/form-data"

Issue: Absent test coverage for multipart validation

• Analysis Confidence: High
• Impact: High risk of regression in form validation
• Resolution: Add comprehensive test cases for multipart validation

2.2 Should Fix (P1🟡)

Issue: Insufficient error context in form data validation

• Analysis Confidence: High
• Impact: Difficult debugging when validation fails
• Suggested Solution: Enhance error message with MIME type context

Issue: Missing documentation and comments

• Analysis Confidence: High
• Impact: Poor maintainability and developer experience
• Suggested Solution: Add descriptive comments and PR description

2.3 Consider (P2🟢)

Area: Content type constants management

• Analysis Confidence: Medium
• Improvement Opportunity: Centralize MIME type constants for consistency

Area: Validation logic abstraction

• Analysis Confidence: Medium
• Improvement Opportunity: Reduce code duplication with helper function

2.4 Summary of Action Items

1. Must Fix: Add mimeMultipart constant definition (P0)
2. Must Fix: Implement test coverage for multipart validation (P0)
3. Should Fix: Improve error messaging with MIME type context (P1)
4. Should Fix: Add documentation and comments (P1)
5. Consider: Centralize MIME type constants (P2)
6. Consider: Abstract validation logic (P2)

3. Technical Analysis

3.1 Code Logic Analysis

📁 openapi31/walk_schema.go - WalkResponseJSONSchemas

• Submitted PR Code:

    if ct == mimeFormUrlencoded || ct == mimeMultipart {
        if err = provideFormDataSchemas(schema, cb); err != nil {
            return err
        }
    }

• Analysis:
  • Current logic extends form validation to multipart forms
  • Missing mimeMultipart constant definition
  • Error handling lacks MIME type context
  • No test coverage for new functionality
• LlamaPReview Suggested Improvements:

    const mimeMultipart = "multipart/form-data"

    if ct == mimeFormUrlencoded || ct == mimeMultipart {
        if err := provideFormDataSchemas(schema, cb); err != nil {
            return fmt.Errorf("%s form data: %w", ct, err)
        }
    }

• Improvement rationale:
  • Ensures compilation success
  • Enhances debugging capabilities
  • Maintains consistency with existing patterns

3.2 Key Quality Aspects

• System scalability considerations: No impact
• Performance bottlenecks and optimizations: None identified
• Testing strategy and coverage: Critical gap in test coverage
• Documentation needs: Significant documentation gaps

4. Overall Evaluation

• Technical assessment: Core implementation is sound but incomplete
• Business impact: High value when fixed
• Risk evaluation: High risk without mandatory fixes
• Notable positive aspects and good practices: Minimal, focused change
• Implementation quality: Needs improvement in testing and documentation
• Final recommendation: Request Changes (must address P0 issues before merging)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.12%. Comparing base (b19848c) to head (6e8fab0).
Report is 12 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #147      +/-   ##
==========================================
- Coverage   40.72%   40.12%   -0.61%     
==========================================
  Files          16       16              
  Lines        6607    10385    +3778     
==========================================
+ Hits         2691     4167    +1476     
- Misses       3440     5708    +2268     
- Partials      476      510      +34     

Flag	Coverage Δ
unittests	40.12% <100.00%> (-0.61%)	⬇️

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