Upload files to S3 via bash

s3upload.bash

#!/bin/sh
#
# Usage
# ./s3upload.bash path/to/file.txt name-of-file-on-s3.txt
#
file="$1"
path="$2"
key_id="s3 key goes here"
key_secret="s3 secret goes here"
bucket="bucket name goes here"

content_type="application/octet-stream"
date="$(LC_ALL=C date -u +"%a, %d %b %Y %X %z")"
md5="$(openssl md5 -binary < "$file" | base64)"

sig="$(printf "PUT\n$md5\n$content_type\n$date\n/$bucket/$path" | openssl sha1 -binary -hmac "$key_secret" | base64)"

curl -T $file https://$bucket.s3.amazonaws.com/$path \
    -H "Date: $date" \
    -H "Authorization: AWS $key_id:$sig" \
    -H "Content-Type: $content_type" \
    -H "Content-MD5: $md5"

For public read of files in bucket add this as the bucket policy .. and rename NAME_OF_YOUR_BUCKET_GOES_HERE to your actual bucket name.

{
    "Version": "2008-10-17",
    "Statement": [
        {
            "Sid": "AllowPublicRead",
            "Effect": "Allow",
            "Principal": {
                "AWS": "*"
            },
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::NAME_OF_YOUR_BUCKET_GOES_HERE/*"
        }
    ]
}