forgejo-federation/vendor/github.com/go-openapi/validate/example_validator.go
2020-09-01 10:01:23 -04:00

270 lines
9.4 KiB
Go
Vendored

// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package validate
import (
"fmt"
"github.com/go-openapi/spec"
)
// ExampleValidator validates example values defined in a spec
type exampleValidator struct {
SpecValidator *SpecValidator
visitedSchemas map[string]bool
}
// resetVisited resets the internal state of visited schemas
func (ex *exampleValidator) resetVisited() {
ex.visitedSchemas = map[string]bool{}
}
// beingVisited asserts a schema is being visited
func (ex *exampleValidator) beingVisited(path string) {
ex.visitedSchemas[path] = true
}
// isVisited tells if a path has already been visited
func (ex *exampleValidator) isVisited(path string) bool {
return isVisited(path, ex.visitedSchemas)
}
// Validate validates the example values declared in the swagger spec
// Example values MUST conform to their schema.
//
// With Swagger 2.0, examples are supported in:
// - schemas
// - individual property
// - responses
//
func (ex *exampleValidator) Validate() (errs *Result) {
errs = new(Result)
if ex == nil || ex.SpecValidator == nil {
return errs
}
ex.resetVisited()
errs.Merge(ex.validateExampleValueValidAgainstSchema()) // error -
return errs
}
func (ex *exampleValidator) validateExampleValueValidAgainstSchema() *Result {
// every example value that is specified must validate against the schema for that property
// in: schemas, properties, object, items
// not in: headers, parameters without schema
res := new(Result)
s := ex.SpecValidator
for method, pathItem := range s.analyzer.Operations() {
for path, op := range pathItem {
// parameters
for _, param := range paramHelp.safeExpandedParamsFor(path, method, op.ID, res, s) {
// As of swagger 2.0, Examples are not supported in simple parameters
// However, it looks like it is supported by go-openapi
// reset explored schemas to get depth-first recursive-proof exploration
ex.resetVisited()
// Check simple parameters first
// default values provided must validate against their inline definition (no explicit schema)
if param.Example != nil && param.Schema == nil {
// check param default value is valid
red := NewParamValidator(&param, s.KnownFormats).Validate(param.Example)
if red.HasErrorsOrWarnings() {
res.AddWarnings(exampleValueDoesNotValidateMsg(param.Name, param.In))
res.MergeAsWarnings(red)
}
}
// Recursively follows Items and Schemas
if param.Items != nil {
red := ex.validateExampleValueItemsAgainstSchema(param.Name, param.In, &param, param.Items)
if red.HasErrorsOrWarnings() {
res.AddWarnings(exampleValueItemsDoesNotValidateMsg(param.Name, param.In))
res.Merge(red)
}
}
if param.Schema != nil {
// Validate example value against schema
red := ex.validateExampleValueSchemaAgainstSchema(param.Name, param.In, param.Schema)
if red.HasErrorsOrWarnings() {
res.AddWarnings(exampleValueDoesNotValidateMsg(param.Name, param.In))
res.Merge(red)
}
}
}
if op.Responses != nil {
if op.Responses.Default != nil {
// Same constraint on default Response
res.Merge(ex.validateExampleInResponse(op.Responses.Default, jsonDefault, path, 0, op.ID))
}
// Same constraint on regular Responses
if op.Responses.StatusCodeResponses != nil { // Safeguard
for code, r := range op.Responses.StatusCodeResponses {
res.Merge(ex.validateExampleInResponse(&r, "response", path, code, op.ID))
}
}
} else if op.ID != "" {
// Empty op.ID means there is no meaningful operation: no need to report a specific message
res.AddErrors(noValidResponseMsg(op.ID))
}
}
}
if s.spec.Spec().Definitions != nil { // Safeguard
// reset explored schemas to get depth-first recursive-proof exploration
ex.resetVisited()
for nm, sch := range s.spec.Spec().Definitions {
res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("definitions.%s", nm), "body", &sch))
}
}
return res
}
func (ex *exampleValidator) validateExampleInResponse(resp *spec.Response, responseType, path string, responseCode int, operationID string) *Result {
s := ex.SpecValidator
response, res := responseHelp.expandResponseRef(resp, path, s)
if !res.IsValid() { // Safeguard
return res
}
responseName, responseCodeAsStr := responseHelp.responseMsgVariants(responseType, responseCode)
// nolint: dupl
if response.Headers != nil { // Safeguard
for nm, h := range response.Headers {
// reset explored schemas to get depth-first recursive-proof exploration
ex.resetVisited()
if h.Example != nil {
red := NewHeaderValidator(nm, &h, s.KnownFormats).Validate(h.Example)
if red.HasErrorsOrWarnings() {
res.AddWarnings(exampleValueHeaderDoesNotValidateMsg(operationID, nm, responseName))
res.MergeAsWarnings(red)
}
}
// Headers have inline definition, like params
if h.Items != nil {
red := ex.validateExampleValueItemsAgainstSchema(nm, "header", &h, h.Items)
if red.HasErrorsOrWarnings() {
res.AddWarnings(exampleValueHeaderItemsDoesNotValidateMsg(operationID, nm, responseName))
res.MergeAsWarnings(red)
}
}
if _, err := compileRegexp(h.Pattern); err != nil {
res.AddErrors(invalidPatternInHeaderMsg(operationID, nm, responseName, h.Pattern, err))
}
// Headers don't have schema
}
}
if response.Schema != nil {
// reset explored schemas to get depth-first recursive-proof exploration
ex.resetVisited()
red := ex.validateExampleValueSchemaAgainstSchema(responseCodeAsStr, "response", response.Schema)
if red.HasErrorsOrWarnings() {
// Additional message to make sure the context of the error is not lost
res.AddWarnings(exampleValueInDoesNotValidateMsg(operationID, responseName))
res.Merge(red)
}
}
if response.Examples != nil {
if response.Schema != nil {
if example, ok := response.Examples["application/json"]; ok {
res.MergeAsWarnings(NewSchemaValidator(response.Schema, s.spec.Spec(), path+".examples", s.KnownFormats, SwaggerSchema(true)).Validate(example))
} else {
// TODO: validate other media types too
res.AddWarnings(examplesMimeNotSupportedMsg(operationID, responseName))
}
} else {
res.AddWarnings(examplesWithoutSchemaMsg(operationID, responseName))
}
}
return res
}
func (ex *exampleValidator) validateExampleValueSchemaAgainstSchema(path, in string, schema *spec.Schema) *Result {
if schema == nil || ex.isVisited(path) {
// Avoids recursing if we are already done with that check
return nil
}
ex.beingVisited(path)
s := ex.SpecValidator
res := new(Result)
if schema.Example != nil {
res.MergeAsWarnings(NewSchemaValidator(schema, s.spec.Spec(), path+".example", s.KnownFormats, SwaggerSchema(true)).Validate(schema.Example))
}
if schema.Items != nil {
if schema.Items.Schema != nil {
res.Merge(ex.validateExampleValueSchemaAgainstSchema(path+".items.example", in, schema.Items.Schema))
}
// Multiple schemas in items
if schema.Items.Schemas != nil { // Safeguard
for i, sch := range schema.Items.Schemas {
res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.items[%d].example", path, i), in, &sch))
}
}
}
if _, err := compileRegexp(schema.Pattern); err != nil {
res.AddErrors(invalidPatternInMsg(path, in, schema.Pattern))
}
if schema.AdditionalItems != nil && schema.AdditionalItems.Schema != nil {
// NOTE: we keep validating values, even though additionalItems is unsupported in Swagger 2.0 (and 3.0 as well)
res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.additionalItems", path), in, schema.AdditionalItems.Schema))
}
for propName, prop := range schema.Properties {
res.Merge(ex.validateExampleValueSchemaAgainstSchema(path+"."+propName, in, &prop))
}
for propName, prop := range schema.PatternProperties {
res.Merge(ex.validateExampleValueSchemaAgainstSchema(path+"."+propName, in, &prop))
}
if schema.AdditionalProperties != nil && schema.AdditionalProperties.Schema != nil {
res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.additionalProperties", path), in, schema.AdditionalProperties.Schema))
}
if schema.AllOf != nil {
for i, aoSch := range schema.AllOf {
res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.allOf[%d]", path, i), in, &aoSch))
}
}
return res
}
// TODO: Temporary duplicated code. Need to refactor with examples
// nolint: dupl
func (ex *exampleValidator) validateExampleValueItemsAgainstSchema(path, in string, root interface{}, items *spec.Items) *Result {
res := new(Result)
s := ex.SpecValidator
if items != nil {
if items.Example != nil {
res.MergeAsWarnings(newItemsValidator(path, in, items, root, s.KnownFormats).Validate(0, items.Example))
}
if items.Items != nil {
res.Merge(ex.validateExampleValueItemsAgainstSchema(path+"[0].example", in, root, items.Items))
}
if _, err := compileRegexp(items.Pattern); err != nil {
res.AddErrors(invalidPatternInMsg(path, in, items.Pattern))
}
}
return res
}