/
unzip.go
164 lines (134 loc) · 4.46 KB
/
unzip.go
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package unzip
import (
"archive/zip"
"bytes"
"context"
"fmt"
"io"
"log"
"net/url"
"os"
"path"
common "github.com/takotakot/iswf_log_to_bq/common/go"
"cloud.google.com/go/storage"
_ "github.com/GoogleCloudPlatform/functions-framework-go/funcframework"
"github.com/GoogleCloudPlatform/functions-framework-go/functions"
"github.com/cloudevents/sdk-go/v2/event"
"github.com/googleapis/google-cloudevents-go/cloud/storagedata"
"golang.org/x/sync/errgroup"
"google.golang.org/protobuf/encoding/protojson"
)
func init() {
// Register a CloudEvent function with the Functions Framework
functions.CloudEvent("HandleUnzipEvent", HandleUnzipEvent)
}
type EnvConfig struct {
ProjectID string
ContentTopicID string
DestBucketName string
}
func NewEnvConfig() (*EnvConfig, error) {
config := EnvConfig{}
requiredEnv := map[string]*string{
"PROJECT_ID": &config.ProjectID,
"CONTENT_TOPIC_ID": &config.ContentTopicID,
"DEST_BUCKET_NAME": &config.DestBucketName,
}
for envVar, valuePtr := range requiredEnv {
value := os.Getenv(envVar)
if value == "" {
return nil, fmt.Errorf("%s environment variable is not set", envVar)
}
*valuePtr = value
}
return &config, nil
}
func HandleUnzipEvent(ctx context.Context, e event.Event) error {
envConfig, err := NewEnvConfig()
if err != nil {
log.Printf("Failed to load EnvConfig: %v", err)
return fmt.Errorf("EnvConfig: %v", err)
}
log.Printf("Event ID: %s", e.ID())
log.Printf("Event Type: %s", e.Type())
var eventData storagedata.StorageObjectData
if err := protojson.Unmarshal(e.Data(), &eventData); err != nil {
return fmt.Errorf("protojson.Unmarshal: %w", err)
}
log.Printf("Bucket: %s", eventData.GetBucket())
log.Printf("File: %s", eventData.GetName())
log.Printf("Metageneration: %d", eventData.GetMetageneration())
log.Printf("Created: %s", eventData.GetTimeCreated().AsTime())
log.Printf("Updated: %s", eventData.GetUpdated().AsTime())
client, err := storage.NewClient(ctx)
if err != nil {
log.Printf("Failed to create client: %v", err)
return fmt.Errorf("storage.NewClient: %v", err)
}
defer client.Close()
realClient := &common.RealStorageClient{Client: client}
return ExtractAndUpload(ctx, realClient, eventData.GetBucket(), eventData.GetName(), eventData.GetSize(), envConfig.DestBucketName, common.PubSubMessageSenderFactory(ctx, envConfig.ProjectID, envConfig.ContentTopicID))
}
func ExtractAndUpload(ctx context.Context, client common.StorageClient, srcBucketName string, srcPath string, srcSize int64, destBucketName string, messageSender func(common.PubSubMessageData) error) error {
srcBucket := client.Bucket(srcBucketName)
srcObject := srcBucket.Object(srcPath)
reader, err := srcObject.NewReader(ctx)
if err != nil {
log.Printf("Failed to read source object: %v", err)
return fmt.Errorf("NewReader: %v", err)
}
defer reader.Close()
// ファイルの内容をバッファに読み込む
buf, err := io.ReadAll(reader)
if err != nil {
return fmt.Errorf("reading file to buffer: %v", err)
}
// バイトスライスからReaderAtを作成
bufReader := bytes.NewReader(buf)
zr, err := zip.NewReader(bufReader, srcSize)
if err != nil {
log.Printf("Failed to create zip reader: %v", err)
return fmt.Errorf("NewReader: %v", err)
}
var errorGroup errgroup.Group
destBucket := client.Bucket(destBucketName)
for _, f := range zr.File {
rc, err := f.Open()
if err != nil {
log.Printf("Failed to open file from zip: %v", err)
return fmt.Errorf("Open: %v", err)
}
defer rc.Close()
decodedName, err := url.QueryUnescape(f.Name)
if err != nil {
log.Printf("Failed to decode filename: %v", err)
return fmt.Errorf("QueryUnescape: %v", err)
}
destObjectName := path.Join(srcPath, decodedName)
object := destBucket.Object(destObjectName)
w := object.NewWriter(ctx)
_, err = io.Copy(w, rc)
if err != nil {
log.Printf("Failed to write to destination bucket: %v", err)
return fmt.Errorf("Copy: %v", err)
}
err = w.Close()
if err != nil {
log.Printf("Failed to close writer: %v", err)
return fmt.Errorf("Close: %v", err)
}
// ファイルが正常に保存された後、Pub/Subメッセージを送信
msgData := common.PubSubMessageData{
Bucket: destBucketName,
FilePath: destObjectName,
}
errorGroup.Go(func() error {
return messageSender(msgData)
})
}
if err := errorGroup.Wait(); err != nil {
log.Printf("Failed to send Pub/Sub message: %v", err)
return fmt.Errorf("sendPubSubMessage: %v", err)
}
return nil
}