mirror of
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202 lines
5.2 KiB
Go
202 lines
5.2 KiB
Go
// +-------------------------------------------------------------------------
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// | Copyright (C) 2016 Yunify, Inc.
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// +-------------------------------------------------------------------------
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// | Licensed under the Apache License, Version 2.0 (the "License");
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// | you may not use this work except in compliance with the License.
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// | You may obtain a copy of the License in the LICENSE file, or at:
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// |
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// | http://www.apache.org/licenses/LICENSE-2.0
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// |
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// | Unless required by applicable law or agreed to in writing, software
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// | distributed under the License is distributed on an "AS IS" BASIS,
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// | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// | See the License for the specific language governing permissions and
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// | limitations under the License.
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// +-------------------------------------------------------------------------
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package unpacker
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import (
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"bytes"
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"fmt"
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"net/http"
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"reflect"
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"strconv"
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"time"
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"github.com/pengsrc/go-shared/convert"
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"github.com/pengsrc/go-shared/json"
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"github.com/yunify/qingstor-sdk-go/logger"
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"github.com/yunify/qingstor-sdk-go/request/data"
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)
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// BaseUnpacker is the base unpacker for all services.
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type BaseUnpacker struct {
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operation *data.Operation
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httpResponse *http.Response
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output *reflect.Value
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}
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// UnpackHTTPRequest unpacks http response with an operation and an output.
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func (b *BaseUnpacker) UnpackHTTPRequest(o *data.Operation, r *http.Response, x *reflect.Value) error {
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b.operation = o
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b.httpResponse = r
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b.output = x
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err := b.exposeStatusCode()
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if err != nil {
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return err
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}
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err = b.parseResponseHeaders()
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if err != nil {
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return err
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}
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err = b.parseResponseBody()
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if err != nil {
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return err
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}
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err = b.parseResponseElements()
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if err != nil {
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return err
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}
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return nil
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}
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func (b *BaseUnpacker) exposeStatusCode() error {
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value := b.output.Elem().FieldByName("StatusCode")
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if value.IsValid() {
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switch value.Interface().(type) {
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case *int:
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logger.Infof(fmt.Sprintf(
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"QingStor response status code: [%d] %d",
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convert.StringToUnixTimestamp(b.httpResponse.Header.Get("Date"), convert.RFC822),
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b.httpResponse.StatusCode,
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))
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value.Set(reflect.ValueOf(&b.httpResponse.StatusCode))
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}
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}
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return nil
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}
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func (b *BaseUnpacker) parseResponseHeaders() error {
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logger.Infof(fmt.Sprintf(
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"QingStor response headers: [%d] %s",
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convert.StringToUnixTimestamp(b.httpResponse.Header.Get("Date"), convert.RFC822),
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fmt.Sprint(b.httpResponse.Header),
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))
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if b.isResponseRight() {
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fields := b.output.Elem()
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for i := 0; i < fields.NumField(); i++ {
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field := fields.Field(i)
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fieldTagName := fields.Type().Field(i).Tag.Get("name")
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fieldTagLocation := fields.Type().Field(i).Tag.Get("location")
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fieldStringValue := b.httpResponse.Header.Get(fieldTagName)
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if fieldTagName != "" && fieldTagLocation == "headers" {
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switch field.Interface().(type) {
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case *string:
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field.Set(reflect.ValueOf(&fieldStringValue))
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case *int:
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intValue, err := strconv.Atoi(fieldStringValue)
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if err != nil {
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return err
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}
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field.Set(reflect.ValueOf(&intValue))
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case *int64:
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int64Value, err := strconv.ParseInt(fieldStringValue, 10, 64)
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if err != nil {
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return err
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}
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field.Set(reflect.ValueOf(&int64Value))
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case *bool:
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case *time.Time:
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formatString := fields.Type().Field(i).Tag.Get("format")
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format := ""
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switch formatString {
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case "RFC 822":
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format = convert.RFC822
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case "ISO 8601":
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format = convert.ISO8601
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}
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timeValue, err := convert.StringToTime(fieldStringValue, format)
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if err != nil {
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return err
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}
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field.Set(reflect.ValueOf(&timeValue))
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}
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}
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}
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}
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return nil
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}
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func (b *BaseUnpacker) parseResponseBody() error {
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if b.isResponseRight() {
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value := b.output.Elem().FieldByName("Body")
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if value.IsValid() {
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switch value.Type().String() {
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case "string":
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buffer := &bytes.Buffer{}
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buffer.ReadFrom(b.httpResponse.Body)
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b.httpResponse.Body.Close()
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logger.Infof(fmt.Sprintf(
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"QingStor response body string: [%d] %s",
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convert.StringToUnixTimestamp(b.httpResponse.Header.Get("Date"), convert.RFC822),
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string(buffer.Bytes()),
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))
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value.SetString(string(buffer.Bytes()))
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case "io.ReadCloser":
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value.Set(reflect.ValueOf(b.httpResponse.Body))
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}
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}
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}
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return nil
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}
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func (b *BaseUnpacker) parseResponseElements() error {
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if b.isResponseRight() {
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if b.httpResponse.Header.Get("Content-Type") == "application/json" {
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buffer := &bytes.Buffer{}
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buffer.ReadFrom(b.httpResponse.Body)
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b.httpResponse.Body.Close()
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logger.Infof(fmt.Sprintf(
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"QingStor response body string: [%d] %s",
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convert.StringToUnixTimestamp(b.httpResponse.Header.Get("Date"), convert.RFC822),
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string(buffer.Bytes()),
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))
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_, err := json.Decode(buffer.Bytes(), b.output.Interface())
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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func (b *BaseUnpacker) isResponseRight() bool {
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rightStatusCodes := b.operation.StatusCodes
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if len(rightStatusCodes) == 0 {
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rightStatusCodes = append(rightStatusCodes, 200)
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}
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flag := false
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for _, statusCode := range rightStatusCodes {
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if statusCode == b.httpResponse.StatusCode {
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flag = true
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}
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}
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return flag
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}
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