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// 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 middleware
import (
"net/http"
"reflect"
"github.com/go-openapi/errors"
"github.com/go-openapi/runtime"
"github.com/go-openapi/runtime/logger"
"github.com/go-openapi/spec"
"github.com/go-openapi/strfmt"
)
// UntypedRequestBinder binds and validates the data from a http request
type UntypedRequestBinder struct {
Spec *spec.Swagger
Parameters map[string]spec.Parameter
Formats strfmt.Registry
paramBinders map[string]*untypedParamBinder
debugLogf func(string, ...any) // a logging function to debug context and all components using it
}
// NewUntypedRequestBinder creates a new binder for reading a request.
func NewUntypedRequestBinder(parameters map[string]spec.Parameter, spec *spec.Swagger, formats strfmt.Registry) *UntypedRequestBinder {
binders := make(map[string]*untypedParamBinder)
for fieldName, param := range parameters {
binders[fieldName] = newUntypedParamBinder(param, spec, formats)
}
return &UntypedRequestBinder{
Parameters: parameters,
paramBinders: binders,
Spec: spec,
Formats: formats,
debugLogf: debugLogfFunc(nil),
}
}
// Bind perform the databinding and validation
func (o *UntypedRequestBinder) Bind(request *http.Request, routeParams RouteParams, consumer runtime.Consumer, data interface{}) error {
val := reflect.Indirect(reflect.ValueOf(data))
isMap := val.Kind() == reflect.Map
var result []error
o.debugLogf("binding %d parameters for %s %s", len(o.Parameters), request.Method, request.URL.EscapedPath())
for fieldName, param := range o.Parameters {
binder := o.paramBinders[fieldName]
o.debugLogf("binding parameter %s for %s %s", fieldName, request.Method, request.URL.EscapedPath())
var target reflect.Value
if !isMap {
binder.Name = fieldName
target = val.FieldByName(fieldName)
}
if isMap {
tpe := binder.Type()
if tpe == nil {
if param.Schema.Type.Contains(typeArray) {
tpe = reflect.TypeOf([]interface{}{})
} else {
tpe = reflect.TypeOf(map[string]interface{}{})
}
}
target = reflect.Indirect(reflect.New(tpe))
}
if !target.IsValid() {
result = append(result, errors.New(500, "parameter name %q is an unknown field", binder.Name))
continue
}
if err := binder.Bind(request, routeParams, consumer, target); err != nil {
result = append(result, err)
continue
}
if binder.validator != nil {
rr := binder.validator.Validate(target.Interface())
if rr != nil && rr.HasErrors() {
result = append(result, rr.AsError())
}
}
if isMap {
val.SetMapIndex(reflect.ValueOf(param.Name), target)
}
}
if len(result) > 0 {
return errors.CompositeValidationError(result...)
}
return nil
}
// SetLogger allows for injecting a logger to catch debug entries.
//
// The logger is enabled in DEBUG mode only.
func (o *UntypedRequestBinder) SetLogger(lg logger.Logger) {
o.debugLogf = debugLogfFunc(lg)
}
func (o *UntypedRequestBinder) setDebugLogf(fn func(string, ...any)) {
o.debugLogf = fn
}