Do not export func MakeSendEndpoint.

deprecated.go

@@ -0,0 +1,175 @@
+package fcm
+
+/*
+const (
+	// Batch Send API
+	BatchSendEndpoint = "https://fcm.googleapis.com/batch"
+	// Requests to the endpoint will start failing after 6/21/2024.
+	// Migrate to the standard HTTP v1 API send method, which supports HTTP/2 for multiplexing.
+)
+
+type ClientConfig struct {
+	SendEndpoint string
+	//BatchSendEndpoint string
+}
+
+// Deprecated: Use SendEach instead.
+func (c *Client) SendMessages(messages []Message) (MultiSendResponse, error) {
+	return c.doSendMessages(messages, false)
+}
+
+func (c *Client) ValidateMessages(messages []Message) (MultiSendResponse, error) {
+	return c.doSendMessages(messages, true)
+}
+
+func (c *Client) doSendMessages(messages []Message, validateOnly bool) (MultiSendResponse, error) {
+	messageCount := len(messages)
+	if messageCount == 0 {
+		return MultiSendResponse{}, nil
+	}
+	if messageCount > maxMessages {
+		return MultiSendResponse{}, errors.New(fmt.Sprintf("messages limit (%d) exceeded: %d", maxMessages, messageCount))
+	}
+
+	accessToken, err := c.ts.Token()
+	if err != nil {
+		return MultiSendResponse{}, err
+	}
+
+	var body bytes.Buffer
+	w := multipart.NewWriter(&body)
+	w.SetBoundary(multipartBoundary)
+
+	for index, msg := range messages {
+		req := SendRequest{
+			ValidateOnly: validateOnly,
+			Message:      msg,
+		}
+
+		body, err := c.makeMessageRequest(req)
+		if err != nil {
+			return MultiSendResponse{}, err
+		}
+
+		if err := writePartTo(w, body, index); err != nil {
+			return MultiSendResponse{}, err
+		}
+	}
+
+	if err := w.Close(); err != nil {
+		return MultiSendResponse{}, errors.WithStack(err)
+	}
+
+	request, err := http.NewRequest(http.MethodPost, c.cfg.BatchSendEndpoint, &body)
+	if err != nil {
+		return MultiSendResponse{}, errors.WithStack(err)
+	}
+
+	accessToken.SetAuthHeader(request)
+	request.Header.Set("Content-Type", fmt.Sprintf(`multipart/mixed; boundary="%s"`, multipartBoundary))
+
+	response, err := c.hc.Do(request)
+	if err != nil {
+		return MultiSendResponse{}, errors.WithStack(err)
+	}
+	defer response.Body.Close()
+
+	return c.makeMultiSendResponse(response, messageCount)
+}
+
+func (c *Client) makeMessageRequest(req SendRequest) ([]byte, error) {
+	reqJson, err := json.Marshal(req)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	request, err := http.NewRequest(http.MethodPost, c.cfg.SendEndpoint, bytes.NewBuffer(reqJson))
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	request.Header.Set("Content-Type", "application/json; charset=UTF-8")
+	request.Header.Set("User-Agent", "")
+
+	var body bytes.Buffer
+	if err := request.Write(&body); err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return body.Bytes(), nil
+}
+
+func writePartTo(w *multipart.Writer, bytes []byte, index int) error {
+	header := make(textproto.MIMEHeader)
+	header.Set("Content-Type", "application/http")
+	header.Set("Content-Transfer-Encoding", "binary")
+	header.Set("Content-ID", fmt.Sprintf("%d", index+1))
+
+	part, err := w.CreatePart(header)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	if _, err := part.Write(bytes); err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}
+
+func (c *Client) makeMultiSendResponse(response *http.Response, totalCount int) (MultiSendResponse, error) {
+	responses := make([]SendResponse, 0, totalCount)
+	var fails int
+
+	_, params, err := mime.ParseMediaType(response.Header.Get("Content-Type"))
+	if err != nil {
+		return MultiSendResponse{}, errors.WithStack(err)
+	}
+
+	reader := multipart.NewReader(response.Body, params["boundary"])
+	for {
+		part, err := reader.NextPart()
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			return MultiSendResponse{}, errors.WithStack(err)
+		}
+
+		resp, err := makeSendResponseFromPart(part)
+		if err != nil {
+			return MultiSendResponse{}, err
+		}
+
+		responses = append(responses, resp)
+		if resp.HasError() {
+			c.logger.Info("fail", "error", fmt.Sprintf("%+v", *resp.Error))
+			fails++
+		}
+	}
+
+	return MultiSendResponse{
+		Responses: responses,
+		Sent:      totalCount - fails,
+		Failed:    fails,
+	}, nil
+}
+
+func makeSendResponseFromPart(part *multipart.Part) (SendResponse, error) {
+	response, err := http.ReadResponse(bufio.NewReader(part), nil)
+	if err != nil {
+		return SendResponse{}, errors.WithStack(err)
+	}
+	defer response.Body.Close()
+
+	body, err := io.ReadAll(response.Body)
+	if err != nil {
+		return SendResponse{}, errors.WithStack(err)
+	}
+
+	var resp SendResponse
+	if err := json.Unmarshal(body, &resp); err != nil {
+		return SendResponse{}, errors.WithMessagef(err, "response body: %s", body)
+	}
+
+	return resp, nil
+}
+*/

fcm.go

@@ -10,26 +10,24 @@
 package fcm
 
 import (
-	"bufio"
 	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
-	"mime"
-	"mime/multipart"
 	"net/http"
-	"net/textproto"
+	"os"
 	"sync"
 
 	"git.bit5.ru/backend/errors"
+
 	"github.com/go-logr/logr"
 	"golang.org/x/oauth2"
 
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/codes"
+	"go.opentelemetry.io/otel/trace"
 )
 
 const tracerName = "git.bit5.ru/backend/fcm"
@@ -43,15 +41,13 @@ const (
 
 	maxMessages       = 500
 	multipartBoundary = "msg_boundary"
-
-	BatchSendEndpoint = "https://fcm.googleapis.com/batch"
 )
 
 var (
 	AuthScopes = []string{"https://www.googleapis.com/auth/firebase.messaging"}
 )
 
-func MakeSendEndpoint(projectId string) string {
+func makeSendEndpoint(projectId string) string {
 	return fmt.Sprintf("https://fcm.googleapis.com/v1/projects/%s/messages:send", projectId)
 }
 
@@ -70,7 +66,7 @@ type Credentials struct {
 }
 
 func ReadCredentialsFromFile(filename string) (Credentials, error) {
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
 		return Credentials{}, errors.WithStack(err)
 	}
@@ -83,24 +79,19 @@ func ReadCredentialsFromFile(filename string) (Credentials, error) {
 	return c, nil
 }
 
-type ClientConfig struct {
-	SendEndpoint      string
-	BatchSendEndpoint string
-}
-
 type Client struct {
-	cfg    ClientConfig
-	ts     oauth2.TokenSource
-	hc     *http.Client
-	logger logr.Logger
+	sendEndpoint string
+	ts           oauth2.TokenSource
+	hc           *http.Client
+	logger       logr.Logger
 }
 
-func NewClient(cfg ClientConfig, ts oauth2.TokenSource, hc *http.Client, logger logr.Logger) *Client {
+func NewClient(projectId string, ts oauth2.TokenSource, hc *http.Client, logger logr.Logger) *Client {
 	return &Client{
-		cfg:    cfg,
-		ts:     ts,
-		hc:     hc,
-		logger: logger,
+		sendEndpoint: makeSendEndpoint(projectId),
+		ts:           ts,
+		hc:           hc,
+		logger:       logger,
 	}
 }
 
@@ -172,7 +163,11 @@ func (c *Client) Validate(ctx context.Context, message Message) (string, error)
 
 func (c *Client) doSendRequest(ctx context.Context, req SendRequest, loggerEnabled bool) (SendResponse, error) {
 
-	_, span := tracer.Start(ctx, "Client.doSendRequest")
+	spanAttrs := trace.WithAttributes(
+		attribute.String("token", req.Message.Token),
+	)
+
+	_, span := tracer.Start(ctx, "Client.doSendRequest", spanAttrs)
 	defer span.End()
 
 	accessToken, err := c.ts.Token()
@@ -188,11 +183,14 @@ func (c *Client) doSendRequest(ctx context.Context, req SendRequest, loggerEnabl
 		span.RecordError(err)
 		return SendResponse{}, errors.WithStack(err)
 	}
+	span.SetAttributes(
+		attribute.String("request.body", string(data)),
+	)
 	if loggerEnabled {
 		c.logger.Info("sending", "message", data)
 	}
 
-	request, err := http.NewRequest(http.MethodPost, c.cfg.SendEndpoint, bytes.NewReader(data))
+	request, err := http.NewRequest(http.MethodPost, c.sendEndpoint, bytes.NewReader(data))
 	if err != nil {
 		span.SetStatus(codes.Error, err.Error())
 		span.RecordError(err)
@@ -204,6 +202,8 @@ func (c *Client) doSendRequest(ctx context.Context, req SendRequest, loggerEnabl
 
 	response, err := c.hc.Do(request)
 	if err != nil {
+		span.SetStatus(codes.Error, err.Error())
+		span.RecordError(err)
 		return SendResponse{}, errors.WithStack(err)
 	}
 	defer response.Body.Close()
@@ -219,7 +219,7 @@ func (c *Client) doSendRequest(ctx context.Context, req SendRequest, loggerEnabl
 
 	span.SetAttributes(
 		attribute.Int("response.status_code", response.StatusCode),
-		attribute.String("response_body", bodyStr),
+		attribute.String("response.body", bodyStr),
 	)
 
 	if response.StatusCode != http.StatusOK {
@@ -240,172 +240,23 @@ func (c *Client) doSendRequest(ctx context.Context, req SendRequest, loggerEnabl
 	return resp, nil
 }
 
-// Deprecated: Use SendEach instead.
-func (c *Client) SendMessages(messages []Message) (MultiSendResponse, error) {
-	return c.doSendMessages(messages, false)
-}
-
-func (c *Client) ValidateMessages(messages []Message) (MultiSendResponse, error) {
-	return c.doSendMessages(messages, true)
-}
-
-func (c *Client) doSendMessages(messages []Message, validateOnly bool) (MultiSendResponse, error) {
-	messageCount := len(messages)
-	if messageCount == 0 {
-		return MultiSendResponse{}, nil
-	}
-	if messageCount > maxMessages {
-		return MultiSendResponse{}, errors.New(fmt.Sprintf("messages limit (%d) exceeded: %d", maxMessages, messageCount))
-	}
-
-	accessToken, err := c.ts.Token()
-	if err != nil {
-		return MultiSendResponse{}, err
-	}
-
-	var body bytes.Buffer
-	w := multipart.NewWriter(&body)
-	w.SetBoundary(multipartBoundary)
-
-	for index, msg := range messages {
-		req := SendRequest{
-			ValidateOnly: validateOnly,
-			Message:      msg,
-		}
-
-		body, err := c.makeMessageRequest(req)
-		if err != nil {
-			return MultiSendResponse{}, err
-		}
-
-		if err := writePartTo(w, body, index); err != nil {
-			return MultiSendResponse{}, err
-		}
-	}
-
-	if err := w.Close(); err != nil {
-		return MultiSendResponse{}, errors.WithStack(err)
-	}
-
-	request, err := http.NewRequest(http.MethodPost, c.cfg.BatchSendEndpoint, &body)
-	if err != nil {
-		return MultiSendResponse{}, errors.WithStack(err)
-	}
-
-	accessToken.SetAuthHeader(request)
-	request.Header.Set("Content-Type", fmt.Sprintf(`multipart/mixed; boundary="%s"`, multipartBoundary))
-
-	response, err := c.hc.Do(request)
-	if err != nil {
-		return MultiSendResponse{}, errors.WithStack(err)
-	}
-	defer response.Body.Close()
-
-	return c.makeMultiSendResponse(response, messageCount)
-}
-
-func (c *Client) makeMessageRequest(req SendRequest) ([]byte, error) {
-	reqJson, err := json.Marshal(req)
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	request, err := http.NewRequest(http.MethodPost, c.cfg.SendEndpoint, bytes.NewBuffer(reqJson))
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	request.Header.Set("Content-Type", "application/json; charset=UTF-8")
-	request.Header.Set("User-Agent", "")
-
-	var body bytes.Buffer
-	if err := request.Write(&body); err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	return body.Bytes(), nil
-}
-
-func writePartTo(w *multipart.Writer, bytes []byte, index int) error {
-	header := make(textproto.MIMEHeader)
-	header.Set("Content-Type", "application/http")
-	header.Set("Content-Transfer-Encoding", "binary")
-	header.Set("Content-ID", fmt.Sprintf("%d", index+1))
-
-	part, err := w.CreatePart(header)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-	if _, err := part.Write(bytes); err != nil {
-		return errors.WithStack(err)
-	}
-
-	return nil
-}
-
-func (c *Client) makeMultiSendResponse(response *http.Response, totalCount int) (MultiSendResponse, error) {
-	responses := make([]SendResponse, 0, totalCount)
-	var fails int
-
-	_, params, err := mime.ParseMediaType(response.Header.Get("Content-Type"))
-	if err != nil {
-		return MultiSendResponse{}, errors.WithStack(err)
-	}
-
-	reader := multipart.NewReader(response.Body, params["boundary"])
-	for {
-		part, err := reader.NextPart()
-		if err == io.EOF {
-			break
-		} else if err != nil {
-			return MultiSendResponse{}, errors.WithStack(err)
-		}
-
-		resp, err := makeSendResponseFromPart(part)
-		if err != nil {
-			return MultiSendResponse{}, err
-		}
-
-		responses = append(responses, resp)
-		if resp.HasError() {
-			c.logger.Info("fail", "error", fmt.Sprintf("%+v", *resp.Error))
-			fails++
-		}
-	}
-
-	return MultiSendResponse{
-		Responses: responses,
-		Sent:      totalCount - fails,
-		Failed:    fails,
-	}, nil
-}
-
-func makeSendResponseFromPart(part *multipart.Part) (SendResponse, error) {
-	response, err := http.ReadResponse(bufio.NewReader(part), nil)
-	if err != nil {
-		return SendResponse{}, errors.WithStack(err)
-	}
-	defer response.Body.Close()
-
-	body, err := ioutil.ReadAll(response.Body)
-	if err != nil {
-		return SendResponse{}, errors.WithStack(err)
-	}
-
-	var resp SendResponse
-	if err := json.Unmarshal(body, &resp); err != nil {
-		return SendResponse{}, errors.WithMessagef(err, "response body: %s", body)
-	}
-
-	return resp, nil
-}
-
 func (c *Client) SendEach(ctx context.Context, messages []Message) (MessageMultiSendResponse, error) {
 
 	ctx, span := tracer.Start(ctx, "Client.SendEach")
 	defer span.End()
 
-	return c.doSendEachInBatch(ctx, messages, false)
+	resp, err := c.doSendEachInBatch(ctx, messages, false)
+	if err != nil {
+		span.SetStatus(codes.Error, err.Error())
+		span.RecordError(err)
+		return MessageMultiSendResponse{}, err
+	}
+
+	if resp.Failed > 0 {
+		span.SetStatus(codes.Error, "Some notifications not sent.")
+	}
+
+	return resp, nil
 }
 
 func (c *Client) doSendEachInBatch(
@@ -421,8 +272,12 @@ func (c *Client) doSendEachInBatch(
 	if messageCount == 0 {
 		return MessageMultiSendResponse{}, nil
 	}
+
 	if messageCount > maxMessages {
-		return MessageMultiSendResponse{}, errors.New(fmt.Sprintf("messages limit (%d) exceeded: %d", maxMessages, messageCount))
+		err := errors.New(fmt.Sprintf("messages limit (%d) exceeded: %d", maxMessages, messageCount))
+		span.SetStatus(codes.Error, err.Error())
+		span.RecordError(err)
+		return MessageMultiSendResponse{}, err
 	}
 
 	var responses = make([]MessageSendResponse, len(messages))
@@ -448,6 +303,7 @@ func (c *Client) doSendEachInBatch(
 					MessageID: resp,
 				}
 			} else {
+				span.SetStatus(codes.Error, "Some notifications not sent.")
 				responses[idx] = MessageSendResponse{
 					Success: false,
 					Error:   err,
@@ -458,18 +314,28 @@ func (c *Client) doSendEachInBatch(
 	// Wait for all Validate/Send calls to finish
 	wg.Wait()
 
-	successCount := 0
+	sentAmount := 0
 	for _, r := range responses {
 		if r.Success {
-			successCount++
+			sentAmount++
 		}
 	}
 
-	return MessageMultiSendResponse{
+	failedAmount := len(responses) - sentAmount
+
+	span.SetAttributes(
+		attribute.Int("resp.total", len(responses)),
+		attribute.Int("resp.sent_amount", sentAmount),
+		attribute.Int("resp.failed_amount", failedAmount),
+	)
+
+	resp := MessageMultiSendResponse{
 		Responses: responses,
-		Sent:      successCount,
-		Failed:    len(responses) - successCount,
-	}, nil
+		Sent:      sentAmount,
+		Failed:    failedAmount,
+	}
+
+	return resp, nil
 }
 
 type MessageSendResponse struct {

message.go

@@ -1,9 +1,14 @@
 package fcm
 
+// Message to send by Firebase Cloud Messaging Service.
+// https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages#resource:-message
 type Message struct {
-	Token        string            `json:"token,omitempty"`
-	Topic        string            `json:"topic,omitempty"`
-	Condition    string            `json:"condition,omitempty"`
+	// Union field target can be only one of the following:
+	Token     string `json:"token,omitempty"`
+	Topic     string `json:"topic,omitempty"`
+	Condition string `json:"condition,omitempty"`
+	// End of list of possible types for union field target.
+
 	Data         map[string]string `json:"data,omitempty"`
 	Notification *Notification     `json:"notification,omitempty"`
 	FcmOptions   *FcmOptions       `json:"fcm_options,omitempty"`
@@ -13,6 +18,7 @@ type Message struct {
 }
 
 // Basic notification template to use across all platforms.
+// https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages#notification
 type Notification struct {
 	Title string `json:"title,omitempty"`
 	Body  string `json:"body,omitempty"`
@@ -170,8 +176,8 @@ type ApnsPayload struct {
 	Aps ApnsPayloadKeys `json:"aps"`
 
 	// TODO: add support for custom keys
-	// https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/generating_a_remote_notification
-	customKeys map[string]interface{}
+	// https://developer.apple.com/documentation/usernotifications/generating-a-remote-notification
+	customKeys map[string]any
 }
 
 type ApnsPayloadKeys struct {