Golang DebugPrintFallthrough示例

示例#1

文件： download.go 项目： btbxbob/wechat

// DownloadToWriter 下载多媒体到 io.Writer.
//  对于视频素材, 先通过 GetVideo 得到 Video 信息, 然后通过 Video.DownloadURL 来下载
func DownloadToWriter(clt *core.Client, mediaId string, writer io.Writer) (written int64, err error) {
	httpClient := clt.HttpClient
	if httpClient == nil {
		httpClient = http.DefaultClient
	}

	var request = struct {
		MediaId string `json:"media_id"`
	}{
		MediaId: mediaId,
	}
	requestBodyBytes, err := json.Marshal(&request)
	if err != nil {
		return
	}
	var errorResult core.Error

	// 先读取 64bytes 内容来判断返回的是不是错误信息
	// {"errcode":40007,"errmsg":"invalid media_id"}
	var buf = make([]byte, 64)

	token, err := clt.Token()
	if err != nil {
		return
	}

	hasRetried := false
RETRY:
	finalURL := "https://api.weixin.qq.com/cgi-bin/material/get_material?access_token=" + url.QueryEscape(token)
	written, err = httpDownloadToWriter(httpClient, finalURL, requestBodyBytes, buf, writer, &errorResult)
	if err != nil {
		return
	}
	if written > 0 {
		return
	}

	switch errorResult.ErrCode {
	case core.ErrCodeOK:
		return // 基本不会出现
	case core.ErrCodeInvalidCredential, core.ErrCodeAccessTokenExpired:
		retry.DebugPrintError(errorResult.ErrCode, errorResult.ErrMsg, token)
		if !hasRetried {
			hasRetried = true
			errorResult = core.Error{}
			if token, err = clt.RefreshToken(token); err != nil {
				return
			}
			retry.DebugPrintNewToken(token)
			goto RETRY
		}
		retry.DebugPrintFallthrough(token)
		fallthrough
	default:
		err = &errorResult
		return
	}
}

示例#2

文件： client.go 项目： btbxbob/wechat

// PostJSON 用 encoding/json 把 request marshal 为 JSON, HTTP POST 到微信服务器,
// 然后将微信服务器返回的 JSON 用 encoding/json 解析到 response.
//
//  NOTE:
//  1. 一般不需要调用这个方法, 请直接调用高层次的封装函数;
//  2. 最终的 URL == incompleteURL + access_token;
//  3. response 格式有要求, 要么是 *Error, 要么是下面结构体的指针(注意 Error 必须是第一个 Field):
//      struct {
//          Error
//          ...
//      }
func (clt *Client) PostJSON(incompleteURL string, request interface{}, response interface{}) (err error) {
	ErrorStructValue, ErrorErrCodeValue := checkResponse(response)

	bodyBuf := textBufferPool.Get().(*bytes.Buffer)
	bodyBuf.Reset()
	defer textBufferPool.Put(bodyBuf)

	if err = json.NewEncoder(bodyBuf).Encode(request); err != nil {
		return
	}
	requestBodyBytes := bodyBuf.Bytes()
	if i := len(requestBodyBytes) - 1; i >= 0 && requestBodyBytes[i] == '\n' {
		requestBodyBytes = requestBodyBytes[:i] // 去掉最后的 '\n', 这样能统一log格式, 不然可能多一个空白行
	}

	httpClient := clt.HttpClient
	if httpClient == nil {
		httpClient = http.DefaultClient
	}

	token, err := clt.Token()
	if err != nil {
		return
	}

	hasRetried := false
RETRY:
	finalURL := incompleteURL + url.QueryEscape(token)
	if err = httpPostJSON(httpClient, finalURL, requestBodyBytes, response); err != nil {
		return
	}

	switch errCode := ErrorErrCodeValue.Int(); errCode {
	case ErrCodeOK:
		return
	case ErrCodeInvalidCredential, ErrCodeAccessTokenExpired:
		errMsg := ErrorStructValue.Field(errorErrMsgIndex).String()
		retry.DebugPrintError(errCode, errMsg, token)
		if !hasRetried {
			hasRetried = true
			ErrorStructValue.Set(errorZeroValue)
			if token, err = clt.RefreshToken(token); err != nil {
				return
			}
			retry.DebugPrintNewToken(token)
			goto RETRY
		}
		retry.DebugPrintFallthrough(token)
		fallthrough
	default:
		return
	}
}

示例#3

文件： download.go 项目： btbxbob/wechat

// DownloadToWriter 下载多媒体到 io.Writer.
//  请注意, 视频文件不支持下载
func DownloadToWriter(clt *core.Client, mediaId string, writer io.Writer) (written int64, err error) {
	httpClient := clt.HttpClient
	if httpClient == nil {
		httpClient = http.DefaultClient
	}

	var incompleteURL = "https://api.weixin.qq.com/cgi-bin/media/get?media_id=" + url.QueryEscape(mediaId) + "&access_token="
	var errorResult core.Error

	token, err := clt.Token()
	if err != nil {
		return
	}

	hasRetried := false
RETRY:
	finalURL := incompleteURL + url.QueryEscape(token)
	written, err = httpDownloadToWriter(httpClient, finalURL, writer, &errorResult)
	if err != nil {
		return
	}
	if written > 0 {
		return
	}

	switch errorResult.ErrCode {
	case core.ErrCodeOK:
		return // 基本不会出现
	case core.ErrCodeInvalidCredential, core.ErrCodeAccessTokenExpired:
		retry.DebugPrintError(errorResult.ErrCode, errorResult.ErrMsg, token)
		if !hasRetried {
			hasRetried = true
			errorResult = core.Error{}
			if token, err = clt.RefreshToken(token); err != nil {
				return
			}
			retry.DebugPrintNewToken(token)
			goto RETRY
		}
		retry.DebugPrintFallthrough(token)
		fallthrough
	default:
		err = &errorResult
		return
	}
}

示例#4

文件： client.go 项目： btbxbob/wechat

// GetJSON HTTP GET 微信资源, 然后将微信服务器返回的 JSON 用 encoding/json 解析到 response.
//
//  NOTE:
//  1. 一般不需要调用这个方法, 请直接调用高层次的封装函数;
//  2. 最终的 URL == incompleteURL + access_token;
//  3. response 格式有要求, 要么是 *Error, 要么是下面结构体的指针(注意 Error 必须是第一个 Field):
//      struct {
//          Error
//          ...
//      }
func (clt *Client) GetJSON(incompleteURL string, response interface{}) (err error) {
	ErrorStructValue, ErrorErrCodeValue := checkResponse(response)

	httpClient := clt.HttpClient
	if httpClient == nil {
		httpClient = http.DefaultClient
	}

	token, err := clt.Token()
	if err != nil {
		return
	}

	hasRetried := false
RETRY:
	finalURL := incompleteURL + url.QueryEscape(token)
	if err = httpGetJSON(httpClient, finalURL, response); err != nil {
		return
	}

	switch errCode := ErrorErrCodeValue.Int(); errCode {
	case ErrCodeOK:
		return
	case ErrCodeInvalidCredential, ErrCodeAccessTokenExpired:
		errMsg := ErrorStructValue.Field(errorErrMsgIndex).String()
		retry.DebugPrintError(errCode, errMsg, token)
		if !hasRetried {
			hasRetried = true
			ErrorStructValue.Set(errorZeroValue)
			if token, err = clt.RefreshToken(token); err != nil {
				return
			}
			retry.DebugPrintNewToken(token)
			goto RETRY
		}
		retry.DebugPrintFallthrough(token)
		fallthrough
	default:
		return
	}
}

示例#5

文件： client_upload.go 项目： btbxbob/wechat

// PostMultipartForm 通用上传接口.
//
//  --BOUNDARY
//  Content-Disposition: form-data; name="FIELDNAME"; filename="FILENAME"
//  Content-Type: application/octet-stream
//
//  FILE-CONTENT
//  --BOUNDARY
//  Content-Disposition: form-data; name="FIELDNAME"
//
//  JSON-DESCRIPTION
//  --BOUNDARY--
//
//
//  NOTE:
//  1. 一般不需要调用这个方法, 请直接调用高层次的封装函数;
//  2. 最终的 URL == incompleteURL + access_token;
//  3. response 格式有要求, 要么是 *Error, 要么是下面结构体的指针(注意 Error 必须是第一个 Field):
//      struct {
//          Error
//          ...
//      }
func (clt *Client) PostMultipartForm(incompleteURL string, fields []MultipartFormField, response interface{}) (err error) {
	ErrorStructValue, ErrorErrCodeValue := checkResponse(response)

	bodyBuf := mediaBufferPool.Get().(*bytes.Buffer)
	bodyBuf.Reset()
	defer mediaBufferPool.Put(bodyBuf)

	multipartWriter := multipart.NewWriter(bodyBuf)
	for i := 0; i < len(fields); i++ {
		if field := &fields[i]; field.IsFile {
			partWriter, err3 := multipartWriter.CreateFormFile(field.Name, field.FileName)
			if err3 != nil {
				return err3
			}
			if _, err3 = io.Copy(partWriter, field.Value); err3 != nil {
				return err3
			}
		} else {
			partWriter, err3 := multipartWriter.CreateFormField(field.Name)
			if err3 != nil {
				return err3
			}
			if _, err3 = io.Copy(partWriter, field.Value); err3 != nil {
				return err3
			}
		}
	}
	if err = multipartWriter.Close(); err != nil {
		return
	}
	requestBodyBytes := bodyBuf.Bytes()
	requestBodyType := multipartWriter.FormDataContentType()

	httpClient := clt.HttpClient
	if httpClient == nil {
		httpClient = http.DefaultClient
	}

	token, err := clt.Token()
	if err != nil {
		return
	}

	hasRetried := false
RETRY:
	finalURL := incompleteURL + url.QueryEscape(token)
	if err = httpPostMultipartForm(httpClient, finalURL, requestBodyType, requestBodyBytes, response); err != nil {
		return
	}

	switch errCode := ErrorErrCodeValue.Int(); errCode {
	case ErrCodeOK:
		return
	case ErrCodeInvalidCredential, ErrCodeAccessTokenExpired:
		errMsg := ErrorStructValue.Field(errorErrMsgIndex).String()
		retry.DebugPrintError(errCode, errMsg, token)
		if !hasRetried {
			hasRetried = true
			ErrorStructValue.Set(errorZeroValue)
			if token, err = clt.RefreshToken(token); err != nil {
				return
			}
			retry.DebugPrintNewToken(token)
			goto RETRY
		}
		retry.DebugPrintFallthrough(token)
		fallthrough
	default:
		return
	}
}