feat: eliminate rarely used apis

extractor.go

@@ -7,13 +7,13 @@ import (
 	"reflect"
 )
 
-type Extractor struct {
+type extractor struct {
 	multipart.Form
 
 	KeyNormalizer func(string) string
 }
 
-func NewExtractor(r *http.Request) *Extractor {
+func newExtractor(r *http.Request) *extractor {
 	var form multipart.Form
 
 	if r.MultipartForm != nil {
@@ -24,13 +24,13 @@ func NewExtractor(r *http.Request) *Extractor {
 		}
 	}
 
-	return &Extractor{
+	return &extractor{
 		Form:          form,
 		KeyNormalizer: nil,
 	}
 }
 
-func (e *Extractor) Execute(ctx *DirectiveContext) error {
+func (e *extractor) Execute(ctx *DirectiveContext) error {
 	for _, key := range ctx.Directive.Argv {
 		if e.KeyNormalizer != nil {
 			key = e.KeyNormalizer(key)
@@ -42,7 +42,7 @@ func (e *Extractor) Execute(ctx *DirectiveContext) error {
 	return nil
 }
 
-func (e *Extractor) extract(ctx *DirectiveContext, key string) error {
+func (e *extractor) extract(ctx *DirectiveContext, key string) error {
 	if ctx.Context.Value(FieldSet) == true {
 		return nil
 	}
@@ -81,7 +81,7 @@ func (e *Extractor) extract(ctx *DirectiveContext, key string) error {
 	return nil
 }
 
-func (e *Extractor) extractMulti(ctx *DirectiveContext, key string) error {
+func (e *extractor) extractMulti(ctx *DirectiveContext, key string) error {
 	var (
 		theSlice reflect.Value
 		elemType = ctx.ValueType.Elem()

file.go

@@ -7,7 +7,7 @@ import (
 )
 
 func init() {
-	RegisterTypeDecoder(reflect.TypeOf(File{}), FileTypeDecoderFunc(DecodeFile))
+	RegisterTypeDecoder(reflect.TypeOf(File{}), FileTypeDecoderFunc(decodeFile))
 }
 
 type File struct {
@@ -16,7 +16,7 @@ type File struct {
 	Valid  bool
 }
 
-func DecodeFile(fileHeader *multipart.FileHeader) (interface{}, error) {
+func decodeFile(fileHeader *multipart.FileHeader) (interface{}, error) {
 	var inFile File
 	if fileHeader == nil {
 		return inFile, ErrNilFile

file_test.go

@@ -25,7 +25,7 @@ type UpdateGitHubIssueInput struct {
 
 func TestMultipartForm_DecodeFile_WithInvalidFileHeaders(t *testing.T) {
 	Convey("Decode file with nil header", t, func() {
-		gotInput, err := DecodeFile(nil)
+		gotInput, err := decodeFile(nil)
 		So(errors.Is(err, ErrNilFile), ShouldBeTrue)
 		got, ok := gotInput.(File)
 		So(ok, ShouldBeTrue)
@@ -37,7 +37,7 @@ func TestMultipartForm_DecodeFile_WithInvalidFileHeaders(t *testing.T) {
 			Filename: "avatar.png",
 			Size:     10,
 		}
-		gotInput, err := DecodeFile(fileHeader)
+		gotInput, err := decodeFile(fileHeader)
 		So(err, ShouldBeError)
 		got, ok := gotInput.(File)
 		So(ok, ShouldBeTrue)

form.go

@@ -3,5 +3,5 @@ package httpin
 // formValueExtractor implements the "form" executor who extracts values from
 // the forms of an HTTP request.
 func formValueExtractor(ctx *DirectiveContext) error {
-	return NewExtractor(ctx.Request).Execute(ctx)
+	return newExtractor(ctx.Request).Execute(ctx)
 }

gochi.go

@@ -28,7 +28,7 @@ func (chi *gochiURLParamExtractor) Execute(ctx *DirectiveContext) error {
 		}
 	}
 
-	extractor := &Extractor{
+	extractor := &extractor{
 		Form: multipart.Form{
 			Value: kvs,
 		},

gorilla.go

@@ -34,7 +34,7 @@ func (mux *gorillaMuxVarsExtractor) Execute(ctx *DirectiveContext) error {
 		kvs[key] = []string{value}
 	}
 
-	extractor := &Extractor{
+	extractor := &extractor{
 		Form: multipart.Form{
 			Value: kvs,
 		},

header.go

@@ -8,7 +8,7 @@ import (
 // headerValueExtractor implements the "header" executor who extracts values
 // from the HTTP headers.
 func headerValueExtractor(ctx *DirectiveContext) error {
-	extractor := &Extractor{
+	extractor := &extractor{
 		Form: multipart.Form{
 			Value: ctx.Request.Header,
 		},

query.go

@@ -5,7 +5,7 @@ import "mime/multipart"
 // queryValueExtractor implements the "query" executor who extracts values from
 // the querystring of an HTTP request.
 func queryValueExtractor(ctx *DirectiveContext) error {
-	extractor := &Extractor{
+	extractor := &extractor{
 		Form: multipart.Form{
 			Value: ctx.Request.URL.Query(),
 		},