AWS S3 Presigned URL upload image with postman

Question

I need to upload a file to S3 with postman for testing. I have a generated presigned URL from S3.

But I don't know how to configure postman correctly for doing this PUT request to my generated presigned URL.

The response on postman with malformed headers is:

<Code>SignatureDoesNotMatch</Code>
<Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message>

the params for the presigned request:

const params = {
  Bucket: 'ss-files-dev',
  Key: 'dansero.jpg',
  ContentType: 'image/jpeg',
  Expires: 100
};

I get the URL, then enter it in postman, with PUT request, but the headers are not complete? 1. if I add content-type on header, there is no response from server 2. in body for the request Im attaching file as "binary"

How to do my PUT request from postman?, thanks

user714157 · Accepted Answer · 2020-04-15 02:10:01Z

10

For me, Postman added hidden headers. If I remove the Content-Type header, the Put worked as expected.

answered Apr 15, 2020 at 2:10

user714157

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Rez Moss · Accepted Answer · 2018-07-19 05:54:46Z

5

Make sure about the following things:

1-The file name equal and same as the key when you get the signed URL.

2-Get the signed URL for putObject by passing the right parameter to getSignedUrl.

For put request not needs to set any additional headers.

answered Jul 19, 2018 at 5:54

Rez Moss

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2 Comments

manuelBetancurt Over a year ago

hi @reza, I unticked all the headers values, and the name is equal in file and request for signed url, what else can it be? thanks!

Rez Moss Over a year ago

Please check this question and answer; I have the same advice for both case stackoverflow.com/questions/51414212/…

mojoken · Accepted Answer · 2020-03-18 15:28:38Z

2

I was able to get this working in Postman using a POST request with “form-data” input. I put all the details in this stack overflow post.

answered Mar 18, 2020 at 15:28

mojoken

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