Question

为了从S3获取特定文件，我使用如下所示的脚本：

# Get the configuration file
outputfilecfg=XXXX
amzFilecfg=XXXX
bucket=XXXX
resource="/${bucket}/${amzFilecfg}"
contentType="text/plain"
dateValue=`date -R`
stringToSigncfg="GET\n\n${contentType}\n${dateValue}\n${resource}"
s3Key=$S3_KEY
s3Secret=$S3_SECRET
signature=`echo -en ${stringToSigncfg} | openssl sha1 -hmac ${s3Secret} -binary | base64`

curl  -H "Host: ${bucket}.s3.amazonaws.com" \
      -H "Date: ${dateValue}" \
      -H "Content-Type: ${contentType}" \
      -H "Authorization: AWS ${s3Key}:${signature}" \
      https://${bucket}.s3.amazonaws.com/${amzFilecfg} -o $outputfilecfg

现在我希望能够获得的价值 S3 docs（https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingMetadata.html）指定的对象元数据。我希望能够仅通过curl而不是aws-cli来做到这一点。这可能吗？

Answer 1

您可以通过发出HEAD请求而不是GET请求来仅获取对象元数据。要在cURL中发出HEAD请求，请使用-I选项。

curl  -I -H "Host: ${bucket}.s3.amazonaws.com" \
      -H "Date: ${dateValue}" \
      -H "Content-Type: ${contentType}" \
      -H "Authorization: AWS ${s3Key}:${signature}" \
      https://${bucket}.s3.amazonaws.com/${amzFilecfg} -o $outputfilecfg

有关这两个方面的详细信息，请参见

HEAD Object API的S3文档
cURL manual

使用curl获取S3文件的MD5值

1 个答案: