我在S3中有一个JSON文件,采用以下结构的格式:
type StockInfo []struct {
Ticker string `json:"ticker"`
BoughtPrice string `json:"boughtPrice"`
NumberOfShares string `json:"numberOfShares"`
}
并且我想将其读取为S3的结构值。在python中,代码如下所示:
import boto3
import json
s3 = boto3.client('s3', 'us-east-1')
obj = s3.get_object(Bucket=os.environ["BucketName"], Key=os.environ["Key"])
fileContents = obj['Body'].read().decode('utf-8')
json_content = json.loads(fileContents)
但是我仍然对如何在Go中实现这一目标感到困惑。我已经走了这么远:
package main
import (
"archive/tar"
"bytes"
"fmt"
"log"
"os"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
"github.com/joho/godotenv"
)
type StockInfo []struct {
Ticker string `json:"ticker"`
BoughtPrice string `json:"boughtPrice"`
NumberOfShares string `json:"numberOfShares"`
}
func init() {
// loads values from .env into the system
if err := godotenv.Load(); err != nil {
log.Print("No .env file found")
}
return
}
func main() {
// Store the PATH environment variable in a variable
sess, err := session.NewSession(&aws.Config{
Region: aws.String("us-east-1")},
)
if err != nil {
panic(err)
}
s3Client := s3.New(sess)
bucket := "ian-test-bucket-go-python"
key := "StockInfo.json"
requestInput := &s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
}
result, err := s3Client.GetObject(requestInput)
if err != nil {
fmt.Println(err)
}
fmt.Println(result)
这将返回body / object缓冲区,但是我不确定如何将其读取为字符串,因此可以将其编组为我的结构。我在类似的问题中找到了此代码:
requestInput := &s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
}
buf := new(aws.WriteAtBuffer)
numBytes, _ := *s3manager.Downloader.Download(buf, requestInput)
tr := tar.NewReader(bytes.NewReader(buf.Bytes()))
但出现以下错误:
not enough arguments in call to method expression s3manager.Downloader.Download
have (*aws.WriteAtBuffer, *s3.GetObjectInput)
want (s3manager.Downloader, io.WriterAt, *s3.GetObjectInput, ...func(*s3manager.Downloader))
multiple-value s3manager.Downloader.Download() in single-value context
有人能指出我正确的方向吗?与python相比,这样做似乎有点令人沮丧。