Generate authorization header for Amazon S3 in Varnish

Amazon S3 REST-API is necessary to generate signature.
vmod-awsrest generate to Authorization and Date header for Amazon S3.

How to use

VCL

import awsrest;
backend default {
 .host = "s3.amazonaws.com";
 .port = "80";
}
sub vcl_recv{
 awsrest.s3_generic(
 "accessKey", //AWSAccessKeyId
 "secretKey", //SecretAccessKeyID
 req.request, //HTTP-Verb
 req.http.content-md5, //Content-MD5
 req.http.content-type, //Content-Type
 "", //canonicalizedAmzHeaders
 req.url, //canonicalizedResource
 now //Date
 );
}

Output

15 TxHeader b Date: 2012年7月03日 16:21:47 +0000
15 TxHeader b Authorization: AWS accessKey:XUfSbQDuOWL24PTR1qavWSr6vjM=

This module set to req.http.Authorization and req.http.Date, bereq is not use.
I recommend call in the vcl_recv.
And, be careful to default settings.
If req.http.Authorization contains, it is not caching. (default setting)

download here.
libvmod-awsrest

—
Reference site
PHP で Amazon S3 の REST API を使用 #1
Authenticating REST Requests

日本語はこっち
VarnishでAmazon S3の認証ヘッダを作るVMODを作ってみた