WIP: Switch to gojsonschema

README.md

@@ -155,44 +155,19 @@ func xmlBodyDecoder(body []byte) (interface{}, error) {
 }
 ```
 
-## Custom function to check uniqueness of array items
-
-By defaut, the library check unique items by below predefined function
-
-```go
-func isSliceOfUniqueItems(xs []interface{}) bool {
-	s := len(xs)
-	m := make(map[string]struct{}, s)
-	for _, x := range xs {
-		key, _ := json.Marshal(&x)
-		m[string(key)] = struct{}{}
-	}
-	return s == len(m)
-}
-```
-
-In the predefined function using `json.Marshal` to generate a string can
-be used as a map key which is to support check the uniqueness of an array
-when the array items are objects or arrays. You can register
-you own function according to your input data to get better performance:
-
-```go
-func main() {
-	// ...
-
-	// Register a customized function used to check uniqueness of array.
-	openapi3.RegisterArrayUniqueItemsChecker(arrayUniqueItemsChecker)
-
-	// ... other validate codes
-}
-
-func arrayUniqueItemsChecker(items []interface{}) bool {
-	// Check the uniqueness of the input slice
-}
-```
 
 ## Sub-v0 breaking API changes
 
+### v0.???
+OpenAPIv3 "in-house" schema validation was replaced with a correct JSON Schema implementation and conversion from OpenAPIv3 Schema to JSON Schema.
+* Dropped `openapi3.ErrOneOfConflict`: now when a value matches more than one `oneOf` schemas the error string contains `Must validate one and only one schema (oneOf)`
+* Dropped `openapi3.SchemaFormatValidationDisabled`: any `openapi3.Schema.Format` value is valid.
+* Dropped `openapi3.FailFast() openapi3.SchemaValidationOption` and `openapi3.SchemaErrorDetailsDisabled`: validating values against schemas is offloaded to a third-party library that does not provide such a mechanism.
+* Dropped `openapi3.RegisterArrayUniqueItemsChecker(openapi3.SliceUniqueItemsChecker)`: validating values against schemas is offloaded to a third-party library that does not provide such a mechanism.
+* Dropped `openapi3.SchemaStringFormats`, `openapi3.FormatCallback`, `openapi3.Format`, `openapi3.FormatOfStringForUUIDOfRFC4122`, `openapi3.DefineStringFormat(...)` and `openapi3.DefineStringFormatCallback(...)`. If your special format is not already under [`gojsonschema.FormatCheckers`](https://pkg.go.dev/github.com/xeipuuv/gojsonschema#pkg-variables), first define a [`gojsonschema.FormatChecker`](https://pkg.go.dev/github.com/xeipuuv/gojsonschema#FormatChecker) and register it with [`gojsonschema.FormatCheckers.Add("my-format", myImpl{})`](https://pkg.go.dev/github.com/xeipuuv/gojsonschema#FormatCheckerChain.Add) *before compiling your schemas*.
+* Dropped `openapi3.ErrSchemaInputNaN` and `openapi3.ErrSchemaInputInf`: OpenAPIv3 does not explicitly mention the related values.
+* Replaced `openapi3.SchemaError` with `openapi3.SchemaValidationError` which wraps `[]gojsonschema.ResultError` and thus provides similar functionality and more.
+
 ### v0.61.0
 * Renamed `openapi2.Swagger` to `openapi2.T`.
 * Renamed `openapi2conv.FromV3Swagger` to `openapi2conv.FromV3`.

go.mod

@@ -7,5 +7,6 @@ require (
 	github.com/go-openapi/jsonpointer v0.19.5
 	github.com/gorilla/mux v1.8.0
 	github.com/stretchr/testify v1.5.1
+	github.com/xeipuuv/gojsonschema v1.2.0
 	gopkg.in/yaml.v2 v2.3.0 // indirect
 )

go.sum

@@ -23,6 +23,12 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f h1:J9EGpcZtP0E/raorCMxlFGSTBrsSlaDGf3jU/qvAE2c=
+github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 h1:EzJWgHovont7NscjpAxXsDA8S8BMYve8Y5+7cuRE7R0=
+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
+github.com/xeipuuv/gojsonschema v1.2.0 h1:LhYJRs+L4fBtjZUfuSZIKGeVu0QRy8e5Xi7D17UxZ74=
+github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

openapi3/errors.go

@@ -3,8 +3,46 @@ package openapi3
 import (
 	"bytes"
 	"errors"
+	"strings"
+
+	"github.com/xeipuuv/gojsonschema"
 )
 
+// SchemaValidationError is a collection of errors
+type SchemaValidationError []gojsonschema.ResultError
+
+var _ error = (*SchemaValidationError)(nil)
+
+func (e SchemaValidationError) Error() string {
+	var buff strings.Builder
+	for i, re := range []gojsonschema.ResultError(e) {
+		if i != 0 {
+			buff.WriteString("\n")
+		}
+		buff.WriteString(re.String())
+	}
+	return buff.String()
+}
+
+// Errors unwraps into much detailed errors.
+// See https://pkg.go.dev/github.com/xeipuuv/gojsonschema#ResultError
+func (e SchemaValidationError) Errors() []gojsonschema.ResultError {
+	return e
+}
+
+// JSONPointer returns a dot (.) delimited "JSON path" to the context of the first error.
+func (e SchemaValidationError) JSONPointer() string {
+	return []gojsonschema.ResultError(e)[0].Field()
+}
+
+func (e SchemaValidationError) asMultiError() MultiError {
+	errs := make([]error, 0, len(e))
+	for _, re := range e {
+		errs = append(errs, errors.New(re.String()))
+	}
+	return errs
+}
+
 // MultiError is a collection of errors, intended for when
 // multiple issues need to be reported upstream
 type MultiError []error

openapi3/openapi3.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 
 	"github.com/getkin/kin-openapi/jsoninfo"
+	"github.com/xeipuuv/gojsonschema"
 )
 
 // T is the root of an OpenAPI v3 document
@@ -19,6 +20,46 @@ type T struct {
 	Servers      Servers              `json:"servers,omitempty" yaml:"servers,omitempty"`
 	Tags         Tags                 `json:"tags,omitempty" yaml:"tags,omitempty"`
 	ExternalDocs *ExternalDocs        `json:"externalDocs,omitempty" yaml:"externalDocs,omitempty"`
+
+	refd, refdAsReq, refdAsRep *gojsonschema.SchemaLoader
+}
+
+// CompileSchemas needs to be called before any use of VisitJSON*()
+func (doc *T) CompileSchemas() error {
+	if err := doc.compileSchemas(newSchemaValidationSettings(VisitAsRequest())); err != nil {
+		return err
+	}
+	if err := doc.compileSchemas(newSchemaValidationSettings(VisitAsResponse())); err != nil {
+		return err
+	}
+	return doc.compileSchemas(newSchemaValidationSettings())
+}
+
+func (doc *T) compileSchemas(settings *schemaValidationSettings) (err error) {
+	docSchemas := doc.Components.Schemas
+	schemas := make(schemasJSON, len(docSchemas))
+	for name, docSchema := range docSchemas {
+		schemas[name] = docSchema.Value.fromOpenAPISchema(settings)
+	}
+	//FIXME merge loops
+	refd := gojsonschema.NewSchemaLoader()
+	for name, schema := range schemas {
+		absRef := "#/components/schemas/" + name
+		sl := gojsonschema.NewGoLoader(schema)
+		if err = refd.AddSchema(absRef, sl); err != nil {
+			return
+		}
+	}
+
+	switch {
+	case settings.asreq:
+		doc.refdAsReq = refd
+	case settings.asrep:
+		doc.refdAsRep = refd
+	default:
+		doc.refd = refd
+	}
+	return
 }
 
 func (doc *T) MarshalJSON() ([]byte, error) {