1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
require "aws-sdk"
class ActiveFile::Sites::S3Site < ActiveFile::Site
attr_reader :client, :bucket
def initialize(access_key_id:, secret_access_key:, region:, bucket:)
@client = Aws::S3::Resource.new(access_key_id: access_key_id, secret_access_key: secret_access_key, region: region)
@bucket = @client.bucket(bucket)
end
def upload(key, data)
object_for(key).put(body: data)
end
def download(key)
if block_given?
stream(key, &block)
else
object_for(key).read
end
end
def delete(key)
object_for(key).delete
end
def exist?(key)
object_for(key).exist?
end
def byte_size(key)
object_for(key).head[:size]
end
def checksum(key)
head = object_for(key).head
# If the etag has no dashes, it's the MD5
if !head.etag.include?("-")
head.etag.gsub('"', '')
# Check for md5 in metadata if it was uploaded via multipart
elsif md5sum = head.meta["md5sum"]
md5sum
# Otherwise, we don't have a digest yet for this key
else
nil
end
end
private
def object_for(key)
bucket.object(key)
end
# Reads the object for the given key in chunks, yielding each to the block.
def stream(key, options = {}, &block)
object = object_for(key)
chunk_size = 5242880 # 5 megabytes
offset = 0
while offset < object.content_length
yield object.read(options.merge(:range => "bytes=#{offset}-#{offset + chunk_size - 1}"))
offset += chunk_size
end
end
end
|
