Class: Aws::S3Interface

Inherits:
AwsBase show all
Extended by:
AwsBaseInterface::ClassMethods
Includes:
AwsBaseInterface
Defined in:
lib/s3/s3_interface.rb

Defined Under Namespace

Classes: S3AclParser, S3BucketLocationParser, S3CopyParser, S3HttpResponseBodyParser, S3HttpResponseHeadParser, S3HttpResponseParser, S3ImprovedListBucketParser, S3ListAllMyBucketsParser, S3ListBucketParser, S3LoggingParser

Constant Summary collapse

USE_100_CONTINUE_PUT_SIZE =
1_000_000
DEFAULT_HOST =
's3.amazonaws.com'
DEFAULT_PORT =
443
DEFAULT_PROTOCOL =
'https'
DEFAULT_SERVICE =
'/'
REQUEST_TTL =
30
DEFAULT_EXPIRES_AFTER =

One day's worth of seconds

1 * 24 * 60 * 60
ONE_YEAR_IN_SECONDS =
365 * 24 * 60 * 60
AMAZON_HEADER_PREFIX =
'x-amz-'
AMAZON_METADATA_PREFIX =
'x-amz-meta-'
@@bench =
AwsBenchmarkingBlock.new

Constants included from AwsBaseInterface

AwsBaseInterface::DEFAULT_SIGNATURE_VERSION

Constants inherited from AwsBase

AwsBase::AMAZON_PROBLEMS

Instance Attribute Summary

Attributes included from AwsBaseInterface

#aws_access_key_id, #cache, #last_errors, #last_request, #last_request_id, #last_response, #logger, #params, #signature_version

Class Method Summary collapse

Instance Method Summary collapse

Methods included from AwsBaseInterface

#cache_hits?, caching, caching=, #caching?, #close_conn, #close_connection, #connection, #generate_request, #generate_request2, #get_conn, #hash_params, #init, #multi_thread, #on_exception, #request_cache_or_info, #request_info2, #request_info3, #request_info_impl, #request_info_xml_simple, #signed_service_params, #symbolize, #update_cache

Methods inherited from AwsBase

amazon_problems, amazon_problems=

Constructor Details

#initialize(aws_access_key_id = nil, aws_secret_access_key = nil, params = {}) ⇒ S3Interface

Creates new RightS3 instance.

s3 = Aws::S3Interface.new('1E3GDYEOGFJPIT7XXXXXX','hgTHt68JY07JKUY08ftHYtERkjgtfERn57XXXXXX', {:multi_thread => true, :logger => Logger.new('/tmp/x.log')}) #=> #<Aws::S3Interface:0xb7b3c27c>

Params is a hash:

{:server       => 's3.amazonaws.com'   # Amazon service host: 's3.amazonaws.com'(default)
 :port         => 443                  # Amazon service port: 80 or 443(default)
 :protocol     => 'https'              # Amazon service protocol: 'http' or 'https'(default)
 :connection_mode  => :default         # options are
                                              :default (will use best known safe (as in won't need explicit close) option, may change in the future)
                                              :per_request (opens and closes a connection on every request)
                                              :single (one thread across entire app)
                                              :per_thread (one connection per thread)
 :logger       => Logger Object}       # Logger instance: logs to STDOUT if omitted }


82
83
84
85
86
87
88
89
90
91
# File 'lib/s3/s3_interface.rb', line 82

def initialize(aws_access_key_id=nil, aws_secret_access_key=nil, params={})
  init({:name             => 'S3',
        :default_host     => ENV['S3_URL'] ? URI.parse(ENV['S3_URL']).host : DEFAULT_HOST,
        :default_port     => ENV['S3_URL'] ? URI.parse(ENV['S3_URL']).port : DEFAULT_PORT,
        :default_service  => ENV['S3_URL'] ? URI.parse(ENV['S3_URL']).path : DEFAULT_SERVICE,
        :default_protocol => ENV['S3_URL'] ? URI.parse(ENV['S3_URL']).scheme : DEFAULT_PROTOCOL},
       aws_access_key_id || ENV['AWS_ACCESS_KEY_ID'],
       aws_secret_access_key || ENV['AWS_SECRET_ACCESS_KEY'],
       params)
end

Class Method Details

.benchObject



49
50
51
# File 'lib/s3/s3_interface.rb', line 49

def self.bench
  @@bench
end

.bench_s3Object



61
62
63
# File 'lib/s3/s3_interface.rb', line 61

def self.bench_s3
  @@bench.service
end

.bench_xmlObject



57
58
59
# File 'lib/s3/s3_interface.rb', line 57

def self.bench_xml
  @@bench.xml
end

.connection_nameObject



43
44
45
# File 'lib/s3/s3_interface.rb', line 43

def self.connection_name
  :s3_connection
end

Instance Method Details

#bucket_location(bucket, headers = {}) ⇒ Object

Retrieve bucket location

s3.create_bucket('my-awesome-bucket-us')        #=> true
puts s3.bucket_location('my-awesome-bucket-us') #=> '' (Amazon's default value assumed)

s3.create_bucket('my-awesome-bucket-eu', :location => :eu) #=> true
puts s3.bucket_location('my-awesome-bucket-eu')            #=> 'EU'


230
231
232
233
234
235
# File 'lib/s3/s3_interface.rb', line 230

def bucket_location(bucket, headers={})
  req_hash = generate_rest_request('GET', headers.merge(:url=>"#{bucket}?location"))
  request_info(req_hash, S3BucketLocationParser.new)
rescue
  on_exception
end

#canonical_string(method, path, headers = {}, expires = nil) ⇒ Object


Requests

Produces canonical string for signing.



97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
# File 'lib/s3/s3_interface.rb', line 97

def canonical_string(method, path, headers={}, expires=nil) # :nodoc:
  s3_headers = {}
  headers.each do |key, value|
    key = key.downcase
    s3_headers[key] = value.join("").strip if key[/^#{AMAZON_HEADER_PREFIX}|^content-md5$|^content-type$|^date$/o]
  end
  s3_headers['content-type'] ||= ''
  s3_headers['content-md5']  ||= ''
  s3_headers['date'] = '' if s3_headers.has_key? 'x-amz-date'
  s3_headers['date'] = expires if expires
  # prepare output string
  out_string = "#{method}\n"
  s3_headers.sort { |a, b| a[0] <=> b[0] }.each do |key, value|
    out_string << (key[/^#{AMAZON_HEADER_PREFIX}/o] ? "#{key}:#{value}\n" : "#{value}\n")
  end
  # ignore everything after the question mark...
  out_string << path.gsub(/\?.*$/, '')
  # ...unless there is an acl or torrent parameter
  out_string << '?acl' if path[/[&?]acl($|&|=)/]
  out_string << '?policy' if path[/[&?]policy($|&|=)/]
  out_string << '?torrent' if path[/[&?]torrent($|&|=)/]
  out_string << '?location' if path[/[&?]location($|&|=)/]
  out_string << '?logging' if path[/[&?]logging($|&|=)/] # this one is beta, no support for now
  out_string
end

#clear_bucket(bucket) ⇒ Object

Removes all keys from bucket. Returns true or an exception.

s3.clear_bucket('my_awesome_bucket') #=> true


804
805
806
807
808
809
810
811
812
# File 'lib/s3/s3_interface.rb', line 804

def clear_bucket(bucket)
  incrementally_list_bucket(bucket) do |results|
    p results
    results[:contents].each { |key| p key; delete(bucket, key[:key]) }
  end
  true
rescue
  on_exception
end

#copy(src_bucket, src_key, dest_bucket, dest_key = nil, directive = :copy, headers = {}) ⇒ Object

Copy an object.

directive: :copy    - copy meta-headers from source (default value)
           :replace - replace meta-headers by passed ones

# copy a key with meta-headers
s3.copy('b1', 'key1', 'b1', 'key1_copy') #=> {:e_tag=>"\"e8b...8d\"", :last_modified=>"2008-05-11T10:25:22.000Z"}

# copy a key, overwrite meta-headers
s3.copy('b1', 'key2', 'b1', 'key2_copy', :replace, 'x-amz-meta-family'=>'Woho555!') #=> {:e_tag=>"\"e8b...8d\"", :last_modified=>"2008-05-11T10:26:22.000Z"}

see: docs.amazonwebservices.com/AmazonS3/2006-03-01/UsingCopyingObjects.html

http://docs.amazonwebservices.com/AmazonS3/2006-03-01/RESTObjectCOPY.html


658
659
660
661
662
663
664
665
666
# File 'lib/s3/s3_interface.rb', line 658

def copy(src_bucket, src_key, dest_bucket, dest_key=nil, directive=:copy, headers={})
  dest_key                            ||= src_key
  headers['x-amz-metadata-directive'] = directive.to_s.upcase
  headers['x-amz-copy-source']        = "#{src_bucket}/#{CGI::escape src_key}"
  req_hash                            = generate_rest_request('PUT', headers.merge(:url=>"#{dest_bucket}/#{CGI::escape dest_key}"))
  request_info(req_hash, S3CopyParser.new)
rescue
  on_exception
end

#create_bucket(bucket, headers = {}) ⇒ Object

Creates new bucket. Returns true or an exception.

# create a bucket at American server
s3.create_bucket('my-awesome-bucket-us') #=> true
# create a bucket at European server
s3.create_bucket('my-awesome-bucket-eu', :location => :eu) #=> true


207
208
209
210
211
212
213
214
215
216
217
218
219
220
# File 'lib/s3/s3_interface.rb', line 207

def create_bucket(bucket, headers={})
  data = nil
  unless headers[:location].blank?
#                data = "<CreateBucketConfiguration><LocationConstraint>#{headers[:location].to_s.upcase}</LocationConstraint></CreateBucketConfiguration>"
    location = headers[:location].to_s
    location.upcase! if location == 'eu'
    data = "<CreateBucketConfiguration><LocationConstraint>#{location}</LocationConstraint></CreateBucketConfiguration>"
  end
  req_hash = generate_rest_request('PUT', headers.merge(:url=>bucket, :data => data))
  request_info(req_hash, RightHttp2xxParser.new)
rescue Exception => e
  # if the bucket exists AWS returns an error for the location constraint interface. Drop it
  e.is_a?(Aws::AwsError) && e.message.include?('BucketAlreadyOwnedByYou') ? true : on_exception
end

Generates link for 'CreateBucket'.

s3.create_bucket_link('my_awesome_bucket') #=> url string


892
893
894
895
896
# File 'lib/s3/s3_interface.rb', line 892

def create_bucket_link(bucket, expires=nil, headers={})
  generate_link('PUT', headers.merge(:url=>bucket), expires)
rescue
  on_exception
end

#delete(bucket, key = '', headers = {}) ⇒ Object

Deletes key. Returns true or an exception.

s3.delete('my_awesome_bucket', 'log/curent/1.log') #=> true


638
639
640
641
642
643
# File 'lib/s3/s3_interface.rb', line 638

def delete(bucket, key='', headers={})
  req_hash = generate_rest_request('DELETE', headers.merge(:url=>"#{bucket}/#{CGI::escape key}"))
  request_info(req_hash, RightHttp2xxParser.new)
rescue
  on_exception
end

#delete_bucket(bucket, headers = {}) ⇒ Object

Deletes new bucket. Bucket must be empty! Returns true or an exception.

s3.delete_bucket('my_awesome_bucket')  #=> true

See also: force_delete_bucket method



274
275
276
277
278
279
# File 'lib/s3/s3_interface.rb', line 274

def delete_bucket(bucket, headers={})
  req_hash = generate_rest_request('DELETE', headers.merge(:url=>bucket))
  request_info(req_hash, RightHttp2xxParser.new)
rescue
  on_exception
end

Generates link for 'DeleteBucket'.

s3.delete_bucket_link('my_awesome_bucket') #=> url string


902
903
904
905
906
# File 'lib/s3/s3_interface.rb', line 902

def delete_bucket_link(bucket, expires=nil, headers={})
  generate_link('DELETE', headers.merge(:url=>bucket), expires)
rescue
  on_exception
end

#delete_folder(bucket, folder_key, separator = '/') ⇒ Object

Deletes all keys where the 'folder_key' may be assumed as 'folder' name. Returns an array of string keys that have been deleted.

s3.list_bucket('my_awesome_bucket').map{|key_data| key_data[:key]} #=> ['test','test/2/34','test/3','test1','test1/logs']
s3.delete_folder('my_awesome_bucket','test')                       #=> ['test','test/2/34','test/3']


830
831
832
833
834
835
836
837
838
839
840
841
# File 'lib/s3/s3_interface.rb', line 830

def delete_folder(bucket, folder_key, separator='/')
  folder_key.chomp!(separator)
  allkeys = []
  incrementally_list_bucket(bucket, {'prefix' => folder_key}) do |results|
    keys = results[:contents].map { |s3_key| s3_key[:key][/^#{folder_key}($|#{separator}.*)/] ? s3_key[:key] : nil }.compact
    keys.each { |key| delete(bucket, key) }
    allkeys << keys
  end
  allkeys
rescue
  on_exception
end

Generates link for 'DeleteObject'.

s3.delete_link('my_awesome_bucket',key) #=> url string


961
962
963
964
965
# File 'lib/s3/s3_interface.rb', line 961

def delete_link(bucket, key, expires=nil, headers={})
  generate_link('DELETE', headers.merge(:url=>"#{bucket}/#{AwsUtils::URLencode key}"), expires)
rescue
  on_exception
end

#fetch_request_params(headers) ⇒ Object

:nodoc:



133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
# File 'lib/s3/s3_interface.rb', line 133

def fetch_request_params(headers) #:nodoc:
  # default server to use
  server  = @params[:server]
  service = @params[:service].to_s
  service.chop! if service[%r{/$}] # remove trailing '/' from service
  # extract bucket name and check it's dns compartibility
  headers[:url].to_s[%r{^([a-z0-9._-]*)(/[^?]*)?(\?.+)?}i]
  bucket_name, key_path, params_list = $1, $2, $3
  # select request model
  #if is_dns_bucket?(bucket_name) 
  # is_dns_bucket isn't called since naming a bucket using URL's path always works (naming using dns cname may have an issue with Eucalyptus)
  path = "#{service}/#{bucket_name}#{key_path}#{params_list}"
  path_to_sign = "#{service}/#{bucket_name}#{key_path}#{params_list}"
  [server, path, path_to_sign]
end

#force_delete_bucket(bucket) ⇒ Object

Deletes all keys in bucket then deletes bucket. Returns true or an exception.

s3.force_delete_bucket('my_awesome_bucket')


818
819
820
821
822
823
# File 'lib/s3/s3_interface.rb', line 818

def force_delete_bucket(bucket)
  clear_bucket(bucket)
  delete_bucket(bucket)
rescue
  on_exception
end

Generates link for QUERY API



858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
# File 'lib/s3/s3_interface.rb', line 858

def generate_link(method, headers={}, expires=nil) #:nodoc:
  # calculate request data
  server, path, path_to_sign = fetch_request_params(headers)
  # expiration time
  expires ||= DEFAULT_EXPIRES_AFTER
  expires = Time.now.utc + expires if expires.is_a?(Fixnum) && (expires < ONE_YEAR_IN_SECONDS)
  expires = expires.to_i
  # remove unset(==optional) and symbolyc keys
  headers.each { |key, value| headers.delete(key) if (value.nil? || key.is_a?(Symbol)) }
  #generate auth strings
  auth_string = canonical_string(method, path_to_sign, headers, expires)
  signature   = CGI::escape(Base64.encode64(OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new("sha1"), @aws_secret_access_key, auth_string)).strip)
  # path building
  addon       = "Signature=#{signature}&Expires=#{expires}&AWSAccessKeyId=#{@aws_access_key_id}"
  path        += path[/\?/] ? "&#{addon}" : "?#{addon}"
  "#{@params[:protocol]}://#{server}:#{@params[:port]}#{path}"
rescue
  on_exception
end

#generate_rest_request(method, headers) ⇒ Object

Generates request hash for REST API. Assumes that headers is URL encoded (use CGI::escape)



151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
# File 'lib/s3/s3_interface.rb', line 151

def generate_rest_request(method, headers) # :nodoc:
  # calculate request data
  server, path, path_to_sign = fetch_request_params(headers)
  data = headers[:data]
  # remove unset(==optional) and symbolyc keys
  headers.each { |key, value| headers.delete(key) if (value.nil? || key.is_a?(Symbol)) }
  #
  headers['content-type'] ||= ''
  headers['date']         = Time.now.httpdate
  # create request
  request                 = "Net::HTTP::#{method.capitalize}".constantize.new(path)
  request.body = data if data
  # set request headers and meta headers
  headers.each { |key, value| request[key.to_s] = value }
  #generate auth strings
  auth_string              = canonical_string(request.method, path_to_sign, request.to_hash)
  signature                = AwsUtils::sign(@aws_secret_access_key, auth_string)
  # set other headers
  request['Authorization'] = "AWS #{@aws_access_key_id}:#{signature}"
  # prepare output hash
  {:request  => request,
   :server   => server,
   :port     => @params[:port],
   :protocol => @params[:protocol]}
end

#get(bucket, key, headers = {}, &block) ⇒ Object

Retrieves object data from Amazon. Returns a hash or an exception.

s3.get('my_awesome_bucket', 'log/curent/1.log') #=>

    {:object  => "Ola-la!",
     :headers => {"last-modified"     => "Wed, 23 May 2007 09:08:04 GMT",
                  "content-type"      => "",
                  "etag"              => "\"000000000096f4ee74bc4596443ef2a4\"",
                  "date"              => "Wed, 23 May 2007 09:08:03 GMT",
                  "x-amz-id-2"        => "ZZZZZZZZZZZZZZZZZZZZ1HJXZoehfrS4QxcxTdNGldR7w/FVqblP50fU8cuIMLiu",
                  "x-amz-meta-family" => "Woho556!",
                  "x-amz-request-id"  => "0000000C246D770C",
                  "server"            => "AmazonS3",
                  "content-length"    => "7"}}

If a block is provided, yields incrementally to the block as the response is read. For large responses, this function is ideal as the response can be 'streamed'. The hash containing header fields is still returned. Example: foo = File.new('./chunder.txt', File::CREAT|File::RDWR) rhdr = s3.get('aws-test', 'Cent5V1_7_1.img.part.00') do |chunk|

foo.write(chunk)

end foo.close



541
542
543
544
545
546
# File 'lib/s3/s3_interface.rb', line 541

def get(bucket, key, headers={}, &block)
  req_hash = generate_rest_request('GET', headers.merge(:url=>"#{bucket}/#{CGI::escape key}"))
  request_info(req_hash, S3HttpResponseBodyParser.new, &block)
rescue
  on_exception
end

#get_acl(bucket, key = '', headers = {}) ⇒ Object

Retieves the ACL (access control policy) for a bucket or object. Returns a hash of headers and xml doc with ACL data. See: docs.amazonwebservices.com/AmazonS3/2006-03-01/RESTAccessPolicy.html.

s3.get_acl('my_awesome_bucket', 'log/curent/1.log') #=>
  {:headers => {"x-amz-id-2"=>"B3BdDMDUz+phFF2mGBH04E46ZD4Qb9HF5PoPHqDRWBv+NVGeA3TOQ3BkVvPBjgxX",
                "content-type"=>"application/xml;charset=ISO-8859-1",
                "date"=>"Wed, 23 May 2007 09:40:16 GMT",
                "x-amz-request-id"=>"B183FA7AB5FBB4DD",
                "server"=>"AmazonS3",
                "transfer-encoding"=>"chunked"},
   :object  => "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<AccessControlPolicy xmlns=\"http://s3.amazonaws.com/doc/2006-03-01/\"><Owner>
                <ID>16144ab2929314cc309ffe736daa2b264357476c7fea6efb2c3347ac3ab2792a</ID><DisplayName>root</DisplayName></Owner>
                <AccessControlList><Grant><Grantee xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:type=\"CanonicalUser\"><ID>
                16144ab2929314cc309ffe736daa2b264357476c7fea6efb2c3347ac3ab2792a</ID><DisplayName>root</DisplayName></Grantee>
                <Permission>FULL_CONTROL</Permission></Grant></AccessControlList></AccessControlPolicy>" }


709
710
711
712
713
714
715
# File 'lib/s3/s3_interface.rb', line 709

def get_acl(bucket, key='', headers={})
  key      = key.blank? ? '' : "/#{CGI::escape key}"
  req_hash = generate_rest_request('GET', headers.merge(:url=>"#{bucket}#{key}?acl"))
  request_info(req_hash, S3HttpResponseBodyParser.new)
rescue
  on_exception
end

Generates link for 'GetACL'.

s3.get_acl_link('my_awesome_bucket',key) #=> url string


972
973
974
975
976
# File 'lib/s3/s3_interface.rb', line 972

def get_acl_link(bucket, key='', headers={})
  return generate_link('GET', headers.merge(:url=>"#{bucket}/#{AwsUtils::URLencode key}?acl"))
rescue
  on_exception
end

#get_acl_parse(bucket, key = '', headers = {}) ⇒ Object

Retieves the ACL (access control policy) for a bucket or object. Returns a hash of :grantees

s3.get_acl_parse('my_awesome_bucket', 'log/curent/1.log') #=>

{ :grantees=>
  { "16...2a"=>
    { :display_name=>"root",
      :permissions=>["FULL_CONTROL"],
      :attributes=>
       { "xsi:type"=>"CanonicalUser",
         "xmlns:xsi"=>"http://www.w3.org/2001/XMLSchema-instance"}},
   "http://acs.amazonaws.com/groups/global/AllUsers"=>
     { :display_name=>"AllUsers",
       :permissions=>["READ"],
       :attributes=>
        { "xsi:type"=>"Group",
          "xmlns:xsi"=>"http://www.w3.org/2001/XMLSchema-instance"}}},
 :owner=>
   { :id=>"16..2a",
     :display_name=>"root"}}


739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
# File 'lib/s3/s3_interface.rb', line 739

def get_acl_parse(bucket, key='', headers={})
  key               = key.blank? ? '' : "/#{CGI::escape key}"
  req_hash          = generate_rest_request('GET', headers.merge(:url=>"#{bucket}#{key}?acl"))
  acl               = request_info(req_hash, S3AclParser.new(:logger => @logger))
  result            = {}
  result[:owner]    = acl[:owner]
  result[:grantees] = {}
  acl[:grantees].each do |grantee|
    key = grantee[:id] || grantee[:uri]
    if result[:grantees].key?(key)
      result[:grantees][key][:permissions] << grantee[:permissions]
    else
      result[:grantees][key] =
          {:display_name => grantee[:display_name] || grantee[:uri].to_s[/[^\/]*$/],
           :permissions  => grantee[:permissions].lines.to_a,
           :attributes   => grantee[:attributes]}
    end
  end
  result
rescue
  on_exception
end

#get_bucket_acl(bucket, headers = {}) ⇒ Object

Retieves the ACL (access control policy) for a bucket. Returns a hash of headers and xml doc with ACL data.



772
773
774
775
776
# File 'lib/s3/s3_interface.rb', line 772

def get_bucket_acl(bucket, headers={})
  return get_acl(bucket, '', headers)
rescue
  on_exception
end

Generates link for 'GetBucketACL'.

s3.get_acl_link('my_awesome_bucket',key) #=> url string


992
993
994
995
996
# File 'lib/s3/s3_interface.rb', line 992

def get_bucket_acl_link(bucket, headers={})
  return get_acl_link(bucket, '', headers)
rescue
  on_exception
end

#get_bucket_policy(bucket) ⇒ Object



785
786
787
788
789
790
# File 'lib/s3/s3_interface.rb', line 785

def get_bucket_policy(bucket)
  req_hash = generate_rest_request('GET', {:url=>"#{bucket}?policy"})
  request_info(req_hash, S3HttpResponseBodyParser.new)
rescue
  on_exception
end

Generates link for 'GetObject'.

if a bucket comply with virtual hosting naming then retuns a link with the bucket as a part of host name:

s3.get_link('my-awesome-bucket',key) #=> https://my-awesome-bucket.s3.amazonaws.com:443/asia%2Fcustomers?Signature=nh7...

otherwise returns an old style link (the bucket is a part of path):

s3.get_link('my_awesome_bucket',key) #=> https://s3.amazonaws.com:443/my_awesome_bucket/asia%2Fcustomers?Signature=QAO...

see docs.amazonwebservices.com/AmazonS3/2006-03-01/VirtualHosting.html



941
942
943
944
945
# File 'lib/s3/s3_interface.rb', line 941

def get_link(bucket, key, expires=nil, headers={})
  generate_link('GET', headers.merge(:url=>"#{bucket}/#{AwsUtils::URLencode key}"), expires)
rescue
  on_exception
end

#get_logging_parse(params) ⇒ Object

Retrieves the logging configuration for a bucket. Returns a hash of :targetbucket, :targetprefix

s3.interface.get_logging_parse(:bucket => “asset_bucket”)

=> {:enabled=>true, :targetbucket=>"mylogbucket", :targetprefix=>"loggylogs/"}


244
245
246
247
248
249
250
251
252
# File 'lib/s3/s3_interface.rb', line 244

def get_logging_parse(params)
  AwsUtils.mandatory_arguments([:bucket], params)
  AwsUtils.allow_only([:bucket, :headers], params)
  params[:headers] = {} unless params[:headers]
  req_hash = generate_rest_request('GET', params[:headers].merge(:url=>"#{params[:bucket]}?logging"))
  request_info(req_hash, S3LoggingParser.new)
rescue
  on_exception
end

#get_object(bucket, key, headers = {}) ⇒ Object

Retrieves object data only (headers are omitted). Returns string or an exception.

s3.get('my_awesome_bucket', 'log/curent/1.log') #=> 'Ola-la!'


847
848
849
850
851
# File 'lib/s3/s3_interface.rb', line 847

def get_object(bucket, key, headers={})
  get(bucket, key, headers)[:object]
rescue
  on_exception
end

#head(bucket, key, headers = {}) ⇒ Object

Retrieves object metadata. Returns a hash of http_response_headers.

s3.head('my_awesome_bucket', 'log/curent/1.log') #=>
  {"last-modified"     => "Wed, 23 May 2007 09:08:04 GMT",
   "content-type"      => "",
   "etag"              => "\"000000000096f4ee74bc4596443ef2a4\"",
   "date"              => "Wed, 23 May 2007 09:08:03 GMT",
   "x-amz-id-2"        => "ZZZZZZZZZZZZZZZZZZZZ1HJXZoehfrS4QxcxTdNGldR7w/FVqblP50fU8cuIMLiu",
   "x-amz-meta-family" => "Woho556!",
   "x-amz-request-id"  => "0000000C246D770C",
   "server"            => "AmazonS3",
   "content-length"    => "7"}


627
628
629
630
631
632
# File 'lib/s3/s3_interface.rb', line 627

def head(bucket, key, headers={})
  req_hash = generate_rest_request('HEAD', headers.merge(:url=>"#{bucket}/#{CGI::escape key}"))
  request_info(req_hash, S3HttpResponseHeadParser.new)
rescue
  on_exception
end

Generates link for 'HeadObject'.

s3.head_link('my_awesome_bucket',key) #=> url string


951
952
953
954
955
# File 'lib/s3/s3_interface.rb', line 951

def head_link(bucket, key, expires=nil, headers={})
  generate_link('HEAD', headers.merge(:url=>"#{bucket}/#{AwsUtils::URLencode key}"), expires)
rescue
  on_exception
end

#incrementally_list_bucket(bucket, options = {}, headers = {}, &block) ⇒ Object

Incrementally list the contents of a bucket. Yields the following hash to a block:

s3.incrementally_list_bucket('my_awesome_bucket', { 'prefix'=>'t', 'marker'=>'', 'max-keys'=>5, delimiter=>'' }) yields
 {
   :name => 'bucketname',
   :prefix => 'subfolder/',
   :marker => 'fileN.jpg',
   :max_keys => 234,
   :delimiter => '/',
   :is_truncated => true,
   :next_marker => 'fileX.jpg',
   :contents => [
     { :key => "file1",
       :last_modified => "2007-05-18T07:00:59.000Z",
       :e_tag => "000000000059075b964b07152d234b70",
       :size => 3,
       :storage_class => "STANDARD",
       :owner_id => "00000000009314cc309ffe736daa2b264357476c7fea6efb2c3347ac3ab2792a",
       :owner_display_name => "root"
     }, { :key, ...}, ... {:key, ...}
   ]
   :common_prefixes => [
     "prefix1",
     "prefix2",
     ...,
     "prefixN"
   ]
 }


332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
# File 'lib/s3/s3_interface.rb', line 332

def incrementally_list_bucket(bucket, options={}, headers={}, &block)
  internal_options = options.symbolize_keys
  begin
    internal_bucket = bucket.dup
    internal_bucket += '?'+internal_options.map { |k, v| "#{k.to_s}=#{CGI::escape v.to_s}" }.join('&') unless internal_options.blank?
    req_hash            = generate_rest_request('GET', headers.merge(:url=>internal_bucket))
    response            = request_info(req_hash, S3ImprovedListBucketParser.new(:logger => @logger))
    there_are_more_keys = response[:is_truncated]
    if (there_are_more_keys)
      internal_options[:marker] = decide_marker(response)
      total_results             = response[:contents].length + response[:common_prefixes].length
      internal_options[:'max-keys'] ? (internal_options[:'max-keys'] -= total_results) : nil
    end
    yield response
  end while there_are_more_keys && under_max_keys(internal_options)
  true
rescue
  on_exception
end

#is_dns_bucket?(bucket_name) ⇒ Boolean

Returns:

  • (Boolean)


124
125
126
127
128
129
130
131
# File 'lib/s3/s3_interface.rb', line 124

def is_dns_bucket?(bucket_name)
  bucket_name = bucket_name.to_s
  return nil unless (3..63) === bucket_name.size
  bucket_name.split('.').each do |component|
    return nil unless component[/^[a-z0-9]([a-z0-9-]*[a-z0-9])?$/]
  end
  true
end

#list_all_my_buckets(headers = {}) ⇒ Object

Returns an array of customer's buckets. Each item is a hash.

s3.list_all_my_buckets #=>
  [{:owner_id           => "00000000009314cc309ffe736daa2b264357476c7fea6efb2c3347ac3ab2792a",
    :owner_display_name => "root",
    :name               => "bucket_name",
    :creation_date      => "2007-04-19T18:47:43.000Z"}, ..., {...}]


193
194
195
196
197
198
# File 'lib/s3/s3_interface.rb', line 193

def list_all_my_buckets(headers={})
  req_hash = generate_rest_request('GET', headers.merge(:url=>''))
  request_info(req_hash, S3ListAllMyBucketsParser.new(:logger => @logger))
rescue
  on_exception
end

Generates link for 'ListAllMyBuckets'.

s3.list_all_my_buckets_link #=> url string


882
883
884
885
886
# File 'lib/s3/s3_interface.rb', line 882

def list_all_my_buckets_link(expires=nil, headers={})
  generate_link('GET', headers.merge(:url=>''), expires)
rescue
  on_exception
end

#list_bucket(bucket, options = {}, headers = {}) ⇒ Object

Returns an array of bucket's keys. Each array item (key data) is a hash.

s3.list_bucket('my_awesome_bucket', { 'prefix'=>'t', 'marker'=>'', 'max-keys'=>5, delimiter=>'' }) #=>
  [{:key                => "test1",
    :last_modified      => "2007-05-18T07:00:59.000Z",
    :owner_id           => "00000000009314cc309ffe736daa2b264357476c7fea6efb2c3347ac3ab2792a",
    :owner_display_name => "root",
    :e_tag              => "000000000059075b964b07152d234b70",
    :storage_class      => "STANDARD",
    :size               => 3,
    :service=> {'is_truncated' => false,
                'prefix'       => "t",
                'marker'       => "",
                'name'         => "my_awesome_bucket",
                'max-keys'     => "5"}, ..., {...}]


297
298
299
300
301
302
303
# File 'lib/s3/s3_interface.rb', line 297

def list_bucket(bucket, options={}, headers={})
  bucket += '?'+options.map { |k, v| "#{k.to_s}=#{CGI::escape v.to_s}" }.join('&') unless options.blank?
  req_hash = generate_rest_request('GET', headers.merge(:url=>bucket))
  request_info(req_hash, S3ListBucketParser.new(:logger => @logger))
rescue
  on_exception
end

Generates link for 'ListBucket'.

s3.list_bucket_link('my_awesome_bucket') #=> url string


912
913
914
915
916
917
# File 'lib/s3/s3_interface.rb', line 912

def list_bucket_link(bucket, options=nil, expires=nil, headers={})
  bucket += '?' + options.map { |k, v| "#{k.to_s}=#{CGI::escape v.to_s}" }.join('&') unless options.blank?
  generate_link('GET', headers.merge(:url=>bucket), expires)
rescue
  on_exception
end

#move(src_bucket, src_key, dest_bucket, dest_key = nil, directive = :copy, headers = {}) ⇒ Object

Move an object.

directive: :copy    - copy meta-headers from source (default value)
           :replace - replace meta-headers by passed ones

# move bucket1/key1 to bucket1/key2
s3.move('bucket1', 'key1', 'bucket1', 'key2') #=> {:e_tag=>"\"e8b...8d\"", :last_modified=>"2008-05-11T10:27:22.000Z"}

# move bucket1/key1 to bucket2/key2 with new meta-headers assignment
s3.copy('bucket1', 'key1', 'bucket2', 'key2', :replace, 'x-amz-meta-family'=>'Woho555!') #=> {:e_tag=>"\"e8b...8d\"", :last_modified=>"2008-05-11T10:28:22.000Z"}


678
679
680
681
682
683
# File 'lib/s3/s3_interface.rb', line 678

def move(src_bucket, src_key, dest_bucket, dest_key=nil, directive=:copy, headers={})
  copy_result = copy(src_bucket, src_key, dest_bucket, dest_key, directive, headers)
  # delete an original key if it differs from a destination one
  delete(src_bucket, src_key) unless src_bucket == dest_bucket && src_key == dest_key
  copy_result
end

#put(bucket, key, data = nil, headers = {}) ⇒ Object

Saves object to Amazon. Returns true or an exception. Any header starting with AMAZON_METADATA_PREFIX is considered user metadata. It will be stored with the object and returned when you retrieve the object. The total size of the HTTP request, not including the body, must be less than 4 KB.

s3.put('my_awesome_bucket', 'log/current/1.log', 'Ola-la!', 'x-amz-meta-family'=>'Woho556!') #=> true

This method is capable of 'streaming' uploads; that is, it can upload data from a file or other IO object without first reading all the data into memory. This is most useful for large PUTs - it is difficult to read a 2 GB file entirely into memory before sending it to S3. To stream an upload, pass an object that responds to 'read' (like the read method of IO) and to either 'lstat' or 'size'. For files, this means streaming is enabled by simply making the call:

s3.put(bucket_name, 'S3keyname.forthisfile',  File.open('localfilename.dat'))

If the IO object you wish to stream from responds to the read method but doesn't implement lstat or size, you can extend the object dynamically to implement these methods, or define your own class which defines these methods. Be sure that your class returns 'nil' from read() after having read 'size' bytes. Otherwise S3 will drop the socket after 'Content-Length' bytes have been uploaded, and HttpConnection will interpret this as an error.

This method now supports very large PUTs, where very large is > 2 GB.

For Win32 users: Files and IO objects should be opened in binary mode. If a text mode IO object is passed to PUT, it will be converted to binary mode.



407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
# File 'lib/s3/s3_interface.rb', line 407

def put(bucket, key, data=nil, headers={})
  # On Windows, if someone opens a file in text mode, we must reset it so
  # to binary mode for streaming to work properly
  if (data.respond_to?(:binmode))
    data.binmode
  end
  if data.is_a?(String)
    data = StringIO.new(data)
#        puts "encoding = #{data.external_encoding} - #{data.internal_encoding}"
#        data.set_encoding("UTF-8")
#        puts "encoding = #{data.external_encoding} - #{data.internal_encoding}"
  end

  data_size = data.respond_to?(:lstat) ? data.lstat.size :
#          data.respond_to?(:bytesize) ? data.bytesize :
  (data.respond_to?(:size) ? data.size : 0)
#      puts 'data_size=' + data_size.to_s
  if (data_size >= USE_100_CONTINUE_PUT_SIZE)
    headers['expect'] = '100-continue'
  end
  req_hash = generate_rest_request('PUT', headers.merge(:url             =>"#{bucket}/#{CGI::escape key}",
                                                        :data            =>data,
                                                        'Content-Length' => data_size.to_s))
  request_info(req_hash, RightHttp2xxParser.new)
rescue
  on_exception
end

#put_acl(bucket, key, acl_xml_doc, headers = {}) ⇒ Object

Sets the ACL on a bucket or object.



763
764
765
766
767
768
769
# File 'lib/s3/s3_interface.rb', line 763

def put_acl(bucket, key, acl_xml_doc, headers={})
  key      = key.blank? ? '' : "/#{CGI::escape key}"
  req_hash = generate_rest_request('PUT', headers.merge(:url=>"#{bucket}#{key}?acl", :data=>acl_xml_doc))
  request_info(req_hash, S3HttpResponseBodyParser.new)
rescue
  on_exception
end

Generates link for 'PutACL'.

s3.put_acl_link('my_awesome_bucket',key) #=> url string


982
983
984
985
986
# File 'lib/s3/s3_interface.rb', line 982

def put_acl_link(bucket, key='', headers={})
  return generate_link('PUT', headers.merge(:url=>"#{bucket}/#{AwsUtils::URLencode key}?acl"))
rescue
  on_exception
end

#put_bucket_acl(bucket, acl_xml_doc, headers = {}) ⇒ Object

Sets the ACL on a bucket only.



779
780
781
782
783
# File 'lib/s3/s3_interface.rb', line 779

def put_bucket_acl(bucket, acl_xml_doc, headers={})
  return put_acl(bucket, '', acl_xml_doc, headers)
rescue
  on_exception
end

Generates link for 'PutBucketACL'.

s3.put_acl_link('my_awesome_bucket',key) #=> url string


1002
1003
1004
1005
1006
# File 'lib/s3/s3_interface.rb', line 1002

def put_bucket_acl_link(bucket, acl_xml_doc, headers={})
  return put_acl_link(bucket, '', acl_xml_doc, headers)
rescue
  on_exception
end

#put_bucket_policy(bucket, policy) ⇒ Object



792
793
794
795
796
797
798
# File 'lib/s3/s3_interface.rb', line 792

def put_bucket_policy(bucket, policy)
  key      = key.blank? ? '' : "/#{CGI::escape key}"
  req_hash = generate_rest_request('PUT', {:url=>"#{bucket}?policy", :data=>policy})
  request_info(req_hash, S3HttpResponseBodyParser.new)
rescue
  on_exception
end

Generates link for 'PutObject'.

s3.put_link('my_awesome_bucket',key, object) #=> url string


923
924
925
926
927
# File 'lib/s3/s3_interface.rb', line 923

def put_link(bucket, key, data=nil, expires=nil, headers={})
  generate_link('PUT', headers.merge(:url=>"#{bucket}/#{AwsUtils::URLencode key}", :data=>data), expires)
rescue
  on_exception
end

#put_logging(params) ⇒ Object

Sets logging configuration for a bucket from the XML configuration document.

params:
 :bucket
 :xmldoc


258
259
260
261
262
263
264
265
266
# File 'lib/s3/s3_interface.rb', line 258

def put_logging(params)
  AwsUtils.mandatory_arguments([:bucket, :xmldoc], params)
  AwsUtils.allow_only([:bucket, :xmldoc, :headers], params)
  params[:headers] = {} unless params[:headers]
  req_hash = generate_rest_request('PUT', params[:headers].merge(:url=>"#{params[:bucket]}?logging", :data => params[:xmldoc]))
  request_info(req_hash, S3TrueParser.new)
rescue
  on_exception
end

#rename(src_bucket, src_key, dest_key, headers = {}) ⇒ Object

Rename an object.

# rename bucket1/key1 to bucket1/key2
s3.rename('bucket1', 'key1', 'key2') #=> {:e_tag=>"\"e8b...8d\"", :last_modified=>"2008-05-11T10:29:22.000Z"}


690
691
692
# File 'lib/s3/s3_interface.rb', line 690

def rename(src_bucket, src_key, dest_key, headers={})
  move(src_bucket, src_key, src_bucket, dest_key, :copy, headers)
end

#request_info(request, parser, options = {}, &block) ⇒ Object

Sends request to Amazon and parses the response. Raises AwsError if any banana happened.



179
180
181
182
# File 'lib/s3/s3_interface.rb', line 179

def request_info(request, parser, options={}, &block) # :nodoc:
#      request_info2(request, parser, @params, :s3_connection, @logger, @@bench, options, &block)
  request_info3(self, request, parser, options, &block)
end

#retrieve_object(params, &block) ⇒ Object

New experimental API for retrieving objects, introduced in Aws 1.8.1. retrieve_object is similar in function to the older function get. It allows for optional verification of object md5 checksums on retrieval. Parameters are passed as hash entries and are checked for completeness as well as for spurious arguments.

If the optional :md5 argument is provided, retrieve_object verifies that the given md5 matches the md5 returned by S3. The :verified_md5 field in the response hash is set true or false depending on the outcome of this check. If no :md5 argument is given, :verified_md5 will be false in the response.

The optional argument of :headers allows the caller to specify arbitrary request header values. Mandatory arguments:

:bucket - the bucket in which the object is stored
:key    - the object address (or path) within the bucket

Optional arguments:

 :headers - hash of additional HTTP headers to include with the request
 :md5     - MD5 checksum against which to verify the retrieved object

s3.retrieve_object(:bucket => "foobucket", :key => "foo")
  => {:verified_md5=>false,
      :headers=>{"last-modified"=>"Mon, 29 Sep 2008 18:58:56 GMT",
                 "x-amz-id-2"=>"2Aj3TDz6HP5109qly//18uHZ2a1TNHGLns9hyAtq2ved7wmzEXDOPGRHOYEa3Qnp",
                 "content-type"=>"",
                 "etag"=>"\"a507841b1bc8115094b00bbe8c1b2954\"",
                 "date"=>"Tue, 30 Sep 2008 00:52:44 GMT",
                 "x-amz-request-id"=>"EE4855DE27A2688C",
                 "server"=>"AmazonS3",
                 "content-length"=>"10"},
      :object=>"polemonium"}

s3.retrieve_object(:bucket => "foobucket", :key => "foo", :md5=>'a507841b1bc8115094b00bbe8c1b2954')
  => {:verified_md5=>true,
      :headers=>{"last-modified"=>"Mon, 29 Sep 2008 18:58:56 GMT",
                 "x-amz-id-2"=>"mLWQcI+VuKVIdpTaPXEo84g0cz+vzmRLbj79TS8eFPfw19cGFOPxuLy4uGYVCvdH",
                 "content-type"=>"", "etag"=>"\"a507841b1bc8115094b00bbe8c1b2954\"",
                 "date"=>"Tue, 30 Sep 2008 00:53:08 GMT",
                 "x-amz-request-id"=>"6E7F317356580599",
                 "server"=>"AmazonS3",
                 "content-length"=>"10"},
      :object=>"polemonium"}

If a block is provided, yields incrementally to the block as the response is read. For large responses, this function is ideal as the response can be 'streamed'. The hash containing header fields is still returned.



589
590
591
592
593
594
595
596
597
598
599
600
601
602
# File 'lib/s3/s3_interface.rb', line 589

def retrieve_object(params, &block)
  AwsUtils.mandatory_arguments([:bucket, :key], params)
  AwsUtils.allow_only([:bucket, :key, :headers, :md5], params)
  params[:headers] = {} unless params[:headers]
  req_hash            = generate_rest_request('GET', params[:headers].merge(:url=>"#{params[:bucket]}/#{CGI::escape params[:key]}"))
  resp                = request_info(req_hash, S3HttpResponseBodyParser.new, &block)
  resp[:verified_md5] = false
  if (params[:md5] && (resp[:headers]['etag'].gsub(/\"/, '') == params[:md5]))
    resp[:verified_md5] = true
  end
  resp
rescue
  on_exception
end

#retrieve_object_and_verify(params, &block) ⇒ Object

Identical in function to retrieve_object, but requires verification that the returned ETag is identical to the checksum passed in by the user as the 'md5' argument. If the check passes, returns the response metadata with the “verified_md5” field set true. Raises an exception if the checksums conflict. This call is implemented as a wrapper around retrieve_object and the user may gain different semantics by creating a custom wrapper.

Raises:



607
608
609
610
611
612
# File 'lib/s3/s3_interface.rb', line 607

def retrieve_object_and_verify(params, &block)
  AwsUtils.mandatory_arguments([:md5], params)
  resp = retrieve_object(params, &block)
  return resp if resp[:verified_md5]
  raise AwsError.new("Retrieved object failed MD5 checksum verification: #{resp.inspect}")
end

#store_object(params) ⇒ Object

New experimental API for uploading objects, introduced in Aws 1.8.1. store_object is similar in function to the older function put, but returns the full response metadata. It also allows for optional verification of object md5 checksums on upload. Parameters are passed as hash entries and are checked for completeness as well as for spurious arguments. The hash of the response headers contains useful information like the Amazon request ID and the object ETag (MD5 checksum).

If the optional :md5 argument is provided, store_object verifies that the given md5 matches the md5 returned by S3. The :verified_md5 field in the response hash is set true or false depending on the outcome of this check. If no :md5 argument is given, :verified_md5 will be false in the response.

The optional argument of :headers allows the caller to specify arbitrary request header values.

s3.store_object(:bucket => “foobucket”, :key => “foo”, :md5 => “a507841b1bc8115094b00bbe8c1b2954”, :data => “polemonium” )

=> {"x-amz-id-2"=>"SVsnS2nfDaR+ixyJUlRKM8GndRyEMS16+oZRieamuL61pPxPaTuWrWtlYaEhYrI/",
    "etag"=>"\"a507841b1bc8115094b00bbe8c1b2954\"",
    "date"=>"Mon, 29 Sep 2008 18:57:46 GMT",
    :verified_md5=>true,
    "x-amz-request-id"=>"63916465939995BA",
    "server"=>"AmazonS3",
    "content-length"=>"0"}

s3.store_object(:bucket => “foobucket”, :key => “foo”, :data => “polemonium” )

=> {"x-amz-id-2"=>"MAt9PLjgLX9UYJ5tV2fI/5dBZdpFjlzRVpWgBDpvZpl+V+gJFcBMW2L+LBstYpbR",
    "etag"=>"\"a507841b1bc8115094b00bbe8c1b2954\"",
    "date"=>"Mon, 29 Sep 2008 18:58:56 GMT",
    :verified_md5=>false,
    "x-amz-request-id"=>"3B25A996BC2CDD3B",
    "server"=>"AmazonS3",
    "content-length"=>"0"}


464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
# File 'lib/s3/s3_interface.rb', line 464

def store_object(params)
  AwsUtils.allow_only([:bucket, :key, :data, :headers, :md5], params)
  AwsUtils.mandatory_arguments([:bucket, :key, :data], params)
  params[:headers] = {} unless params[:headers]

  params[:data].binmode if (params[:data].respond_to?(:binmode)) # On Windows, if someone opens a file in text mode, we must reset it to binary mode for streaming to work properly
  if (params[:data].respond_to?(:lstat) && params[:data].lstat.size >= USE_100_CONTINUE_PUT_SIZE) ||
      (params[:data].respond_to?(:size) && params[:data].size >= USE_100_CONTINUE_PUT_SIZE)
    params[:headers]['expect'] = '100-continue'
  end

  req_hash = generate_rest_request('PUT', params[:headers].merge(:url=>"#{params[:bucket]}/#{CGI::escape params[:key]}", :data=>params[:data]))
  resp     = request_info(req_hash, S3HttpResponseHeadParser.new)
  if (params[:md5])
    resp[:verified_md5] = (resp['etag'].gsub(/\"/, '') == params[:md5]) ? true : false
  else
    resp[:verified_md5] = false
  end
  resp
rescue
  on_exception
end

#store_object_and_verify(params) ⇒ Object

Identical in function to store_object, but requires verification that the returned ETag is identical to the checksum passed in by the user as the 'md5' argument. If the check passes, returns the response metadata with the “verified_md5” field set true. Raises an exception if the checksums conflict. This call is implemented as a wrapper around store_object and the user may gain different semantics by creating a custom wrapper.

s3.store_object_and_verify(:bucket => “foobucket”, :key => “foo”, :md5 => “a507841b1bc8115094b00bbe8c1b2954”, :data => “polemonium” )

=> {"x-amz-id-2"=>"IZN3XsH4FlBU0+XYkFTfHwaiF1tNzrm6dIW2EM/cthKvl71nldfVC0oVQyydzWpb",
    "etag"=>"\"a507841b1bc8115094b00bbe8c1b2954\"",
    "date"=>"Mon, 29 Sep 2008 18:38:32 GMT",
    :verified_md5=>true,
    "x-amz-request-id"=>"E8D7EA4FE00F5DF7",
    "server"=>"AmazonS3",
    "content-length"=>"0"}

s3.store_object_and_verify(:bucket => “foobucket”, :key => “foo”, :md5 => “a507841b1bc8115094b00bbe8c1b2953”, :data => “polemonium” )

Aws::AwsError: Uploaded object failed MD5 checksum verification: {"x-amz-id-2"=>"HTxVtd2bf7UHHDn+WzEH43MkEjFZ26xuYvUzbstkV6nrWvECRWQWFSx91z/bl03n",
                                                                       "etag"=>"\"a507841b1bc8115094b00bbe8c1b2954\"",
                                                                       "date"=>"Mon, 29 Sep 2008 18:38:41 GMT",
                                                                       :verified_md5=>false,
                                                                       "x-amz-request-id"=>"0D7ADE09F42606F2",
                                                                       "server"=>"AmazonS3",
                                                                       "content-length"=>"0"}


508
509
510
511
512
# File 'lib/s3/s3_interface.rb', line 508

def store_object_and_verify(params)
  AwsUtils.mandatory_arguments([:md5], params)
  r = store_object(params)
  r[:verified_md5] ? (return r) : (raise AwsError.new("Uploaded object failed MD5 checksum verification: #{r.inspect}"))
end