How to access response from boto3 bucket.put_object?

user_10426490 0
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Looking at the boto3 docs, I see that client.put_object has a response shown, but I don't see a way to get the response from bucket.put_object.

Sample snippet:

        s3 = boto3.resource(
                's3',
                aws_access_key_id=redacted,
                aws_secret_access_key=redacted,
        )

        s3.Bucket(bucketName).put_object(Key="bucket-path/" + fileName, Body=blob, ContentMD5=md5Checksum)

        logging.info("Uploaded to S3 successfully")

How is this accomplished?

boto3 httpresponse amazon-web-services put amazon-s3
2 Answers

put_object returns S3.Object, which in turn has the wait_until_exists method.

Therefore, something along these lines should be sufficient (my verification code is bellow):

import boto3

s3 = boto3.resource('s3')

with open('test.img', 'rb') as f:

    obj = s3.Bucket('test-ssss4444').put_object(
            Key='fileName', 
            Body=f)
    
obj.wait_until_exists() # optional

print("Uploaded to S3 successfully")

put_object is a blocking operation. Thus it will block your program until your file is uploaded. Therefore wait_until_exists is not really needed. But if you want to make sure that the upload actually went through and the object is in S3 you can use it.

user_2488230

You have to use boto3.client instead of boto3.resource to get the response information like ETag and etc. It has a little bit different syntax.

import boto3

s3 = boto3.resource('s3')
s3.put_object(Bucket='bucket-name', Key='fileName', Body=body)
user_43850700
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