问题
I am having some trouble figuring out how to access a file from Amazon S3. Lets say that the bucket that the file lives in is BUCKET_NAME, the file is FILE_NAME, etc. I have tried the following two urls:
https://s3.amazonaws.com/BUCKET_NAME/FILE_NAME/
?Expires=EXPIRATION
&Signature=SIGNATURE
&SignatureVersion=2
&SignatureMethod=HmacSHA1
&AWSAccessKeyId=KEYID
But this gives me the following error:
NoSuchKey
The specified key does not exist.
and I have also tried
https://s3.amazonaws.com/BUCKET_NAME/
?Key=FILE_NAME
&Expires=EXPIRATION
&Signature=SIGNATURE
&SignatureVersion=2
&SignatureMethod=HmacSHA1
&AWSAccessKeyId=KEYID
but this returns a webpage with a list of all of the files in the given bucket (including FILE_NAME), instead of the specific file I want. I have also tried throwing in "Action=GetObject" into the url as well but that doesn't seem to change anything.
It would be helpful to find out which (if any) is the proper method and what I am doing wrong. I have been digging through amazon documentation for a while now but I can't seem to sort it out.
Thanks.
回答1:
Its actually formulated more like:
https://<bucket-name>.s3.amazonaws.com/<key>
See here
回答2:
Documentation here, and I'll use the Frankfurt region as an example.
2 different URL styles:
- Virtual host style: https://BUCKET.s3.amazonaws.com/FILE
- Path style: https://s3-eu-central-1.amazonaws.com/BUCKET/FILE
But this url does not work:
- https://s3.amazonaws.com/BUCKET/FILE
The message is explicit: The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint.
I may be talking about another problem because I'm not getting NoSuchKey error but I suspect the error message has been made clearer over time...
回答3:
Perhaps not what the OP was after, but for those searching the URL to simply access a readable object on S3 is more like:
https://<region>.amazonaws.com/<bucket-name>/<key>
Where <region> is something like s3-ap-southeast-2.
Click on the item in the S3 GUI to get the link for your bucket.
回答4:
As @stevebot said, do this:
https://<bucket-name>.s3.amazonaws.com/<key>
The one important thing I would like to add is that you either have to make your bucket objects all publicly accessible OR you can add a custom policy to your bucket policy. That custom policy could allow traffic from your network IP range or a different credential.
来源：https://stackoverflow.com/questions/7933458/url-to-get-a-file-from-amazon-s3