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Go API Changes# github.com/swaggest/openapi-go/openapi31 ## compatible changes (*PathItem).PathItemOrReference: added (*Reflector).AddWebhook: added (*Spec).AddWebhook: added # summary Inferred base version: v0.2.58 Suggested version: v0.3.0 |
Unit Test Coveragetotal: (statements) 45.9% Coverage of changed lines
Coverage diff with base branch
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1. Overview
1.1 Core Changes
- Primary purpose and scope: Adds webhook support to OpenAPI 3.1 specification implementation
- Key components modified:
helper.go,reflect.go, andreflect_test.go - Cross-component impacts: Extends core spec building capabilities without breaking existing functionality
- Business value alignment: Enables event-driven architectures using OpenAPI 3.1 webhooks, expanding library applicability
1.2 Technical Architecture
- System design modifications: Adds webhook support as first-class citizens alongside path operations
- Component interaction changes: Webhooks use similar but distinct processing paths from regular operations
- Integration points impact: Maintains backward compatibility while adding new functionality
- Dependency changes and implications: No new dependencies introduced
2. Critical Findings
2.1 Must Fix (P0🔴)
Issue: Incorrect path sanitization for webhooks
- Analysis Confidence: High
- Impact: Causes data corruption of webhook names, potential naming conflicts, and incorrect path parameter extraction
- Resolution: Remove path sanitization for webhooks and implement proper method validation
// Replace in helper.go:
method, _, _, err := openapi.SanitizeMethodPath(method, "/")
// With:
method = strings.ToLower(method)
validMethods := map[string]bool{
"get": true, "post": true, "put": true,
"delete": true, "patch": true, "head": true,
"options": true, "trace": true,
}
if !validMethods[method] {
return fmt.Errorf("invalid HTTP method: %s", method)
}Issue: Undefined WithWebhooksItem method
- Analysis Confidence: High
- Impact: Causes compilation failure, making webhook registration non-functional
- Resolution: Implement missing method in
Spec
func (s *Spec) WithWebhooksItem(name string, item PathItemOrReference) {
if s.Webhooks == nil {
s.Webhooks = make(map[string]PathItemOrReference)
}
s.Webhooks[name] = item
}2.2 Should Fix (P1🟡)
Issue: Inconsistent nolint directive
- Analysis Confidence: High
- Impact: Potential linter violations for unhandled enum cases
- Suggested Solution: Restore
exhaustivedirective
// Change from:
switch params.Value.Kind() { //nolint // Not all kinds have formats defined.
// To:
switch params.Value.Kind() { //nolint:exhaustive // Not all kinds have formats defined.Issue: Inadequate error wrapping
- Analysis Confidence: High
- Impact: Harder debugging during spec generation
- Suggested Solution: Add operation type to error messages
// Change from:
return fmt.Errorf("validate path params %s %s: %w", ...)
// To:
return fmt.Errorf("validate path params for %s [%s %s]: %w",
operationType, method, pathPattern, err)Issue: Test coverage gaps
- Analysis Confidence: High
- Impact: Potential undetected issues in error handling and edge cases
- Suggested Solution: Add negative test cases for:
- Duplicate webhook registration errors
- Invalid HTTP method handling
- Error paths in
setupOC()
2.3 Consider (P2🟢)
Area: Webhook-specific validation
- Analysis Confidence: High
- Improvement Opportunity: Add dedicated validation for webhook properties to prevent invalid OpenAPI spec generation
func isValidWebhookName(name string) bool {
// Implementation for name constraints
return len(name) > 0 && len(name) <= 255 && // Example constraints
!strings.ContainsAny(name, " \t\n\r")
}Area: Operation type flag
- Analysis Confidence: Medium
- Improvement Opportunity: Enhance context creation with explicit type for clearer intent
type OperationType int
const (
PathOperation OperationType = iota
WebhookOperation
)
func (r *Reflector) NewOperationContext(
opType OperationType,
method string,
name string,
) // ...Area: Documentation gaps
- Analysis Confidence: High
- Improvement Opportunity: Add package-level examples for webhook usage to accelerate adoption
2.4 Summary of Action Items
-
Critical fixes required before merge:
- Fix path sanitization for webhooks
- Implement missing
WithWebhooksItemmethod
-
High priority improvements:
- Fix nolint directive
- Improve error context
- Add negative test cases
-
Recommended enhancements:
- Add webhook name validation
- Implement explicit operation type flag
- Add usage documentation
3. Technical Analysis
3.1 Code Logic Analysis
📁 openapi31/helper.go - Spec.AddWebhook
- Submitted PR Code:
func (s *Spec) AddWebhook(method, name string, operation Operation) error {
if _, found := s.Webhooks[name]; found {
return fmt.Errorf("duplicate webhook name: %s", name)
}
method = strings.ToLower(method)
// Add "No Content" response if there are no responses configured.
if len(operation.ResponsesEns().MapOfResponseOrReferenceValues) == 0 && operation.Responses.Default == nil {
operation.Responses.WithMapOfResponseOrReferenceValuesItem(strconv.Itoa(http.StatusNoContent), ResponseOrReference{
Response: &Response{
Description: http.StatusText(http.StatusNoContent),
},
})
}
method, _, _, err := openapi.SanitizeMethodPath(method, "/")
if err != nil {
return err
}
pathItem := PathItem{}
if err := pathItem.SetOperation(method, &operation); err != nil {
return err
}
s.WithWebhooksItem(name, pathItem.PathItemOrReference())
return nil
}- Analysis:
- Current logic incorrectly treats webhook names as paths
- Missing proper HTTP method validation specific to webhooks
- Assumes existence of
WithWebhooksItemmethod - Business logic correctly handles default response configuration
- LlamaPReview Suggested Improvements:
func (s *Spec) AddWebhook(method, name string, operation Operation) error {
if _, found := s.Webhooks[name]; found {
return fmt.Errorf("duplicate webhook name: %s", name)
}
// Validate method
method = strings.ToLower(method)
validMethods := map[string]bool{
"get": true, "post": true, "put": true,
"delete": true, "patch": true, "head": true,
"options": true, "trace": true,
}
if !validMethods[method] {
return fmt.Errorf("invalid HTTP method: %s", method)
}
// Add default response if needed
if len(operation.ResponsesEns().MapOfResponseOrReferenceValues) == 0 && operation.Responses.Default == nil {
operation.Responses.WithMapOfResponseOrReferenceValuesItem(strconv.Itoa(http.StatusNoContent), ResponseOrReference{
Response: &Response{
Description: http.StatusText(http.StatusNoContent),
},
})
}
pathItem := PathItem{}
if err := pathItem.SetOperation(method, &operation); err != nil {
return fmt.Errorf("failed to set operation for webhook %s: %w", name, err)
}
// Initialize Webhooks map if nil
if s.Webhooks == nil {
s.Webhooks = make(map[string]PathItemOrReference)
}
s.Webhooks[name] = pathItem.PathItemOrReference()
return nil
}- Improvement rationale:
- Removes incorrect path sanitization for webhooks
- Adds proper method validation
- Implements missing webhook registration functionality
- Improves error messages with more context
📁 openapi31/reflect.go - NewOperationContext
- Submitted PR Code:
func (r *Reflector) NewOperationContext(method, pathPatternOrWebhookName string) (openapi.OperationContext, error) {
method, pathPattern, pathParams, err := openapi.SanitizeMethodPath(method, pathPatternOrWebhookName)
if err != nil {
return nil, err
}
pathItem := r.SpecEns().PathsEns().MapOfPathItemValues[pathPattern]
operation, err := pathItem.Operation(method)
if err != nil {
return nil, err
}
if operation != nil {
return nil, fmt.Errorf("operation already exists: %s %s", method, pathPatternOrWebhookName)
}
operation = &Operation{}
pathParamsMap := make(map[string]bool, len(pathParams))
for _, p := range pathParams {
pathParamsMap[p] = true
}
oc := operationContext{
r: r,
op: operation,
method: method,
pathPattern: pathPattern,
pathParams: pathParamsMap,
}
return oc, nil
}- Analysis:
- Incorrectly applies path sanitization to webhook names
- Doesn't distinguish between path operations and webhooks
- Error messages could be more descriptive
- Maintains good separation of concerns
- LlamaPReview Suggested Improvements:
func (r *Reflector) NewOperationContext(opType OperationType, method, name string) (openapi.OperationContext, error) {
// Validate method first
method = strings.ToLower(method)
validMethods := map[string]bool{
"get": true, "post": true, "put": true,
"delete": true, "patch": true, "head": true,
"options": true, "trace": true,
}
if !validMethods[method] {
return nil, fmt.Errorf("invalid HTTP method: %s", method)
}
var pathPattern string
var pathParams []string
if opType == PathOperation {
// Only sanitize for path operations
var err error
method, pathPattern, pathParams, err = openapi.SanitizeMethodPath(method, name)
if err != nil {
return nil, fmt.Errorf("invalid path pattern: %w", err)
}
} else {
pathPattern = name // For webhooks, use name directly
pathParams = nil // Webhooks don't have path parameters
}
// Check for existing operation
var existingOp *Operation
var err error
if opType == PathOperation {
pathItem := r.SpecEns().PathsEns().MapOfPathItemValues[pathPattern]
existingOp, err = pathItem.Operation(method)
} else {
// For webhooks, check in Webhooks map
if webhook, exists := r.SpecEns().Webhooks[name]; exists {
if webhook.PathItem != nil {
existingOp, _ = webhook.PathItem.Operation(method)
}
}
}
if err != nil {
return nil, fmt.Errorf("error checking existing operation: %w", err)
}
if existingOp != nil {
opTypeStr := "path operation"
if opType == WebhookOperation {
opTypeStr = "webhook"
}
return nil, fmt.Errorf("%s already exists: %s %s", opTypeStr, method, name)
}
operation := &Operation{}
pathParamsMap := make(map[string]bool, len(pathParams))
for _, p := range pathParams {
pathParamsMap[p] = true
}
return operationContext{
r: r,
op: operation,
method: method,
pathPattern: pathPattern,
pathParams: pathParamsMap,
opType: opType, // Add operation type to context
}, nil
}- Improvement rationale:
- Properly distinguishes between path operations and webhooks
- Adds explicit operation type handling
- Improves error messages with more context
- Maintains backward compatibility while adding new functionality
3.2 Key Quality Aspects
- System scalability considerations: Implementation maintains O(1) complexity for webhook lookups
- Performance bottlenecks and optimizations: No significant performance impacts identified
- Testing strategy and coverage: Comprehensive happy-path testing exists; needs negative test cases
- Documentation needs: Package-level examples for webhook usage should be added
4. Overall Evaluation
- Technical assessment: Well-implemented extension of existing functionality with proper separation of concerns
- Business impact: Significant value in supporting OpenAPI 3.1 webhooks for event-driven architectures
- Risk evaluation: Medium risk without P0 fixes, low risk after fixes
- Notable positive aspects and good practices:
- Consistent extension of existing patterns
- Effective reuse of operation setup logic
- Clean separation of concerns
- Comprehensive happy-path test coverage
- Implementation quality: High quality implementation that aligns with existing code patterns
- Final recommendation: Request Changes to address P0 issues, then Approve
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Related to #148.
Adds a simple way to build https://learn.openapis.org/examples/v3.1/webhook-example.html.
See test for an example:
{ "openapi":"3.1.0","info":{"title":"","version":""},"paths":{}, "webhooks":{ "newPet":{ "post":{ "requestBody":{ "description":"Information about a new pet in the system", "content":{ "application/json":{"schema":{"$ref":"#/components/schemas/Openapi31TestPet"}} } }, "responses":{ "200":{ "description":"Return a 200 status to indicate that the data was received successfully" } } } } }, "components":{ "schemas":{ "Openapi31TestPet":{ "properties":{"breed":{"type":"string"},"name":{"type":"string"}}, "type":"object" } } } }