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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| package binding | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "github.com/cloudwego/hertz/pkg/protocol" | ||
| "reflect" | ||
| ) | ||
|
|
||
| type fileTypeDecoder struct { | ||
| fieldInfo | ||
| isRepeated bool | ||
| } | ||
|
|
||
| func (d *fileTypeDecoder) Decode(req *protocol.Request, params PathParams, reqValue reflect.Value) error { | ||
| fieldValue := GetFieldValue(reqValue, d.parentIndex) | ||
| field := fieldValue.Field(d.index) | ||
|
|
||
| if d.isRepeated { | ||
| return d.fileSliceDecode(req, params, reqValue) | ||
| } | ||
| var fileName string | ||
| // file_name > form > fieldName | ||
| for _, tagInfo := range d.tagInfos { | ||
| if tagInfo.Key == fileNameTag { | ||
| fileName = tagInfo.Value | ||
| break | ||
| } | ||
| if tagInfo.Key == formTag { | ||
| fileName = tagInfo.Value | ||
| } | ||
| } | ||
| if len(fileName) == 0 { | ||
| fileName = d.fieldName | ||
| } | ||
| file, err := req.FormFile(fileName) | ||
| if err != nil { | ||
| return fmt.Errorf("can not get file '%s', err: %v", fileName, err) | ||
| } | ||
| if field.Kind() == reflect.Ptr { | ||
| t := field.Type() | ||
| var ptrDepth int | ||
| for t.Kind() == reflect.Ptr { | ||
| t = t.Elem() | ||
| ptrDepth++ | ||
| } | ||
| v := reflect.New(t).Elem() | ||
| v.Set(reflect.ValueOf(*file)) | ||
| field.Set(ReferenceValue(v, ptrDepth)) | ||
| return nil | ||
| } | ||
|
|
||
| // Non-pointer elems | ||
| field.Set(reflect.ValueOf(*file)) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (d *fileTypeDecoder) fileSliceDecode(req *protocol.Request, params PathParams, reqValue reflect.Value) error { | ||
| fieldValue := GetFieldValue(reqValue, d.parentIndex) | ||
| field := fieldValue.Field(d.index) | ||
| // 如果没值，需要为其建一个值 | ||
| if field.Kind() == reflect.Ptr { | ||
| if field.IsNil() { | ||
| nonNilVal, ptrDepth := GetNonNilReferenceValue(field) | ||
| field.Set(ReferenceValue(nonNilVal, ptrDepth)) | ||
| } | ||
| } | ||
| var parentPtrDepth int | ||
| for field.Kind() == reflect.Ptr { | ||
| field = field.Elem() | ||
| parentPtrDepth++ | ||
| } | ||
|
|
||
| var fileName string | ||
| // file_name > form > fieldName | ||
| for _, tagInfo := range d.tagInfos { | ||
| if tagInfo.Key == fileNameTag { | ||
| fileName = tagInfo.Value | ||
| break | ||
| } | ||
| if tagInfo.Key == formTag { | ||
| fileName = tagInfo.Value | ||
| } | ||
| } | ||
| if len(fileName) == 0 { | ||
| fileName = d.fieldName | ||
| } | ||
| multipartForm, err := req.MultipartForm() | ||
| if err != nil { | ||
| return fmt.Errorf("can not get multipartForm info, err: %v", err) | ||
| } | ||
| files, exist := multipartForm.File[fileName] | ||
| if !exist { | ||
| return fmt.Errorf("the file '%s' is not existed", fileName) | ||
| } | ||
|
|
||
| if field.Kind() == reflect.Array { | ||
| if len(files) != field.Len() { | ||
| return fmt.Errorf("the numbers(%d) of file '%s' does not match the length(%d) of %s", len(files), fileName, field.Len(), field.Type().String()) | ||
| } | ||
| } else { | ||
| // slice need creating enough capacity | ||
| field = reflect.MakeSlice(field.Type(), len(files), len(files)) | ||
| } | ||
|
|
||
| // handle multiple pointer | ||
| var ptrDepth int | ||
| t := d.fieldType.Elem() | ||
| elemKind := t.Kind() | ||
| for elemKind == reflect.Ptr { | ||
| t = t.Elem() | ||
| elemKind = t.Kind() | ||
| ptrDepth++ | ||
| } | ||
|
|
||
| for idx, file := range files { | ||
| v := reflect.New(t).Elem() | ||
| v.Set(reflect.ValueOf(*file)) | ||
| field.Index(idx).Set(ReferenceValue(v, ptrDepth)) | ||
| } | ||
| fieldValue.Field(d.index).Set(ReferenceValue(field, parentPtrDepth)) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func getMultipartFileDecoder(field reflect.StructField, index int, tagInfos []TagInfo, parentIdx []int) ([]decoder, error) { | ||
| fieldType := field.Type | ||
| for field.Type.Kind() == reflect.Ptr { | ||
| fieldType = field.Type.Elem() | ||
| } | ||
| isRepeated := false | ||
| if fieldType.Kind() == reflect.Array || fieldType.Kind() == reflect.Slice { | ||
| isRepeated = true | ||
| } | ||
|
|
||
| fieldDecoder := &fileTypeDecoder{ | ||
| fieldInfo: fieldInfo{ | ||
| index: index, | ||
| parentIndex: parentIdx, | ||
| fieldName: field.Name, | ||
| tagInfos: tagInfos, | ||
| fieldType: fieldType, | ||
| }, | ||
| isRepeated: isRepeated, | ||
| } | ||
|
|
||
| return []decoder{fieldDecoder}, nil | ||
| } |
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