In case anyone ever comes across this again, I found the answer on a post on Scott's forum.
I was adding headers and missed the CRLF at the end of the last header.
-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Greg Wilburn
Sent: Thursday, July 21, 2022 10:48 AM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: [EXTERNAL] HTTPAPI v1.43 Error 44
I've been struggling with connecting to an AWS service to get temporary credentials.
https://sts.amazonaws.com
I had the request matching exactly to a working Postman request (postman had a few extra headers), but was getting the error below.
On a whim, I tried using GETURI and it worked!!
What the heck?
(http_debug log)
GET /?Version=2011-06-15&Action=AssumeRole&RoleSessionName=postmanSpApi&RoleArn=arn:aws:iam::211290147119:role/SellingPartnerRole HTTP/1.1
Host: sts.amazonaws.com
User-Agent: http-api/1.43
2022-07-21-09.24.57.090915: CommSSL_BlockWrite(): gsk_secure_soc_write socket fd=2, flags=00000084, blocking=0
2022-07-21-09.24.57.091148: CommSSL_BlockWrite(): gsk_secure_soc_write rc=0, len=643
Authorization: AWS4-HMAC-SHA256 Credential=AKIATCMO7ZEXQCKCSYRZ/20220721/us-east-1/sts/aws4_request, SignedHeaders=host;x-amz-access-token;x-amz-date, Signature=859df0dea8d684456496978876205af10fe6c33ef47156d23d1f15a48000e517
x-amz-access-token: Atza|IwEBIB_DELETED_FROM_HERE
X-Amz-Date: 20220721T123240Z
Accept: */*
2022-07-21-09.24.57.091536: CommSSL_BlockWrite(): gsk_secure_soc_write socket fd=2, flags=00000084, blocking=0
2022-07-21-09.24.57.091739: CommSSL_BlockWrite(): gsk_secure_soc_write rc=0, len=2
2022-07-21-09.24.57.092005: recvresp(): entered
2022-07-21-09.24.57.092207: recvresp: reading response header, space left=32767
2022-07-21-09.25.20.215020: SetError() #44: CommTCP_read: Socket has been shut down.
2022-07-21-09.25.20.215303: recvresp(): end with err
2022-07-21-09.25.20.215696: http_close(): entered
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Director of IT
301.895.3792 ext. 1231
301.895.3895 direct
gwilburn@xxxxxxxxxxxxxxxxxxxxxxx<mailto:gwilburn@xxxxxxxxxxxxxxxxxxxxxxx>
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