Having problems uploading feed to Amazon

[phpandrew]

Hi everyone,

I am currently writing my script in PHP/cURL. I am able to successfully get a response from the **/feeds/2021-06-30/documents** url:
e.g.:
{"feedDocumentId":"amzn1.tortuga.3.3641b3e8-76e7-465a-9516-884a1d3183f3.<removed>","url":"https://tortuga-prod-na.s3-external-1.amazonaws.com/%2FNinetyDays/amzn1.tortuga.3.3641b3e8-76e7-465a-9516-884a1d3183f3.<removed>?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220201T180057Z&X-Amz-SignedHeaders=content-type%3Bhost&X-Amz-Expires=300&X-Amz-Credential=<removed>%2F20220201%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=42ded9644992bba05f5310da541b1e4a90638f37fb2d05a77f6439ac83c453c0"}

I now believe I need to send a request to the following URL:
https://tortuga-prod-na.s3-external-1.amazonaws.com/%2FNinetyDays/amzn1.tortuga.3.3641b3e8-76e7-465a-9516-884a1d3183f3.<removed>?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220201T180057Z&X-Amz-SignedHeaders=content-type%3Bhost&X-Amz-Expires=300&X-Amz-Credential=<removed>%2F20220201%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=42ded9644992bba05f5310da541b1e4a90638f37fb2d05a77f6439ac83c453c0

I have tried just sending a curl request to this URL with the XML contents as the body, but i get signatures do not match (because i'm not sending any signature with the request)
The request signature we calculated does not match the signature you provided. Check your key and signing method

Next, i have tried signing the request using the same method I did to create the feed document, but i get the following error:
Only one auth mechanism allowed; only the X-Amz-Algorithm query parameter, Signature query string parameter or the Authorization header should be specified
For this request, I made sure to sign it with the correct host (s3-external-1.amazonaws.com) and using the right service (s3).

For my original request to CreateFeedDocuments, i sent the following body: text/xml; charset=UTF-8.
I did make sure to send this as a PUT request.

I am a little confused if i need to sign the request when uploading the file to that Amazon S3 link or not. The instructions weren't very clear, and based off the Java example, it doesn't appear so.
I have tried disregarding the signature and just sending a cURL request with the following headers, but i only get the original error message:

$headers[] = "host: $host";
$headers[] = "content-type: text/xml; charset=UTF-8";

> The request signature we calculated does not match the signature you provided. Check your key and signing method

[phpandrew]

I resolved the issue:
The URL you get back, (e.g. https://tortuga-prod-na.s3-external-1.amazonaws.com/%2FNinetyDays/amzn1.tortuga.3.3641b3e8-76e7-465a-9516-884a1d3183f3.<removed>?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220201T180057Z&X-Amz-SignedHeaders=content-type%3Bhost&X-Amz-Expires=300&X-Amz-Credential=<removed>%2F20220201%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=42ded9644992bba05f5310da541b1e4a90638f37fb2d05a77f6439ac83c453c0)

send a PUT request to this URL, no signing / Authorization headers needed.

I included the following headers when sending the request. Note, you will not get a reply, but a response code 200 if successful:

$headers = array();
$headers[] = "host: tortuga-prod-na.s3-external-1.amazonaws.com";
$headers[] = 'Accept: application/json';
$headers[] = 'content-length: '.strlen($xml_data);
$headers[] = 'content-type: text/xml; charset=UTF-8';
$headers[] = "user-agent: Your User Agent Here";

Then, make sure to send the XML data through cURL:

...
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml_data);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
...

I hope this helps the next person!