# # Copyright (c) 2007-2008 RightScale Inc # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # module RightAws class S3Interface < RightAwsBase USE_100_CONTINUE_PUT_SIZE = 1_000_000 include RightAwsBaseInterface DEFAULT_HOST = 's3.amazonaws.com' DEFAULT_PORT = 443 DEFAULT_PROTOCOL = 'https' DEFAULT_SERVICE = '/' REQUEST_TTL = 30 DEFAULT_EXPIRES_AFTER = 1 * 24 * 60 * 60 # One day's worth of seconds ONE_YEAR_IN_SECONDS = 365 * 24 * 60 * 60 AMAZON_HEADER_PREFIX = 'x-amz-' AMAZON_METADATA_PREFIX = 'x-amz-meta-' @@bench = AwsBenchmarkingBlock.new def self.bench_xml @@bench.xml end def self.bench_s3 @@bench.service end # Params supported: # :no_subdomains => true # do not use bucket as a part of domain name but as a part of path @@params = {} def self.params @@params end # get custom option def param(name) # - check explicitly defined param (@params) # - otherwise check implicitly defined one (@@params) @params.has_key?(name) ? @params[name] : @@params[name] end # Creates new RightS3 instance. # # s3 = RightAws::S3Interface.new('1E3GDYEOGFJPIT7XXXXXX','hgTHt68JY07JKUY08ftHYtERkjgtfERn57XXXXXX', {:logger => Logger.new('/tmp/x.log')}) #=> # # # 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) # :logger => Logger Object} # Logger instance: logs to STDOUT if omitted } # 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 #----------------------------------------------------------------- # Requests #----------------------------------------------------------------- # Produces canonical string for signing. def canonical_string(method, path, headers={}, expires=nil) # :nodoc: s3_headers = {} headers.each do |key, value| key = key.downcase value = case when value.is_a?(Array) then value.join('') else value.to_s end s3_headers[key] = value.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($|&|=)/] out_string << '?torrent' if path[/[&?]torrent($|&|=)/] out_string << '?location' if path[/[&?]location($|&|=)/] out_string << '?logging' if path[/[&?]logging($|&|=)/] # this one is beta, no support for now out_string end # http://docs.amazonwebservices.com/AmazonS3/2006-03-01/index.html?BucketRestrictions.html 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])?$/] end true end def fetch_request_params(headers) #:nodoc: # default server to use server = @params[:server] service = @params[:service].to_s service.chop! if service[%r{/$}] # 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 !param(:no_subdomains) && is_dns_bucket?(bucket_name) # fix a path server = "#{bucket_name}.#{server}" key_path ||= '/' path = "#{service}#{key_path}#{params_list}" else path = "#{service}/#{bucket_name}#{key_path}#{params_list}" end path_to_sign = "#{service}/#{bucket_name}#{key_path}#{params_list}" # path_to_sign = "/#{bucket_name}#{key_path}#{params_list}" [ server, path, path_to_sign ] end # Generates request hash for REST API. # Assumes that headers[:url] is URL encoded (use CGI::escape) 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}".right_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 # Sends request to Amazon and parses the response. # Raises AwsError if any banana happened. def request_info(request, parser, &block) # :nodoc: request_info_impl(:s3_connection, @@bench, request, parser, &block) end # 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"}, ..., {...}] # 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 # 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 # def create_bucket(bucket, headers={}) data = nil location = case headers[:location].to_s when 'us','US' then '' when 'eu' then 'EU' else headers[:location].to_s end unless location.right_blank? data = "#{location}" 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?(RightAws::AwsError) && e.message.include?('BucketAlreadyOwnedByYou') ? true : on_exception end # 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' # 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 # Retrieves the logging configuration for a bucket. # Returns a hash of {:enabled, :targetbucket, :targetprefix} # # s3.interface.get_logging_parse(:bucket => "asset_bucket") # => {:enabled=>true, :targetbucket=>"mylogbucket", :targetprefix=>"loggylogs/"} # # 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 # Sets logging configuration for a bucket from the XML configuration document. # params: # :bucket # :xmldoc 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, RightHttp2xxParser.new) rescue on_exception end # 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 # 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 # 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"}, ..., {...}] # def list_bucket(bucket, options={}, headers={}) bucket += '?'+options.map{|k, v| "#{k.to_s}=#{CGI::escape v.to_s}"}.join('&') unless options.right_blank? req_hash = generate_rest_request('GET', headers.merge(:url=>bucket)) request_info(req_hash, S3ListBucketParser.new(:logger => @logger)) rescue on_exception end # 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" # ] # } def incrementally_list_bucket(bucket, options={}, headers={}, &block) internal_options = options.right_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.right_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 private def decide_marker(response) return response[:next_marker].dup if response[:next_marker] last_key = response[:contents].last[:key] last_prefix = response[:common_prefixes].last if(!last_key) return nil if(!last_prefix) last_prefix.dup elsif(!last_prefix) last_key.dup else last_key > last_prefix ? last_key.dup : last_prefix.dup end end def under_max_keys(internal_options) internal_options[:'max-keys'] ? internal_options[:'max-keys'] > 0 : true end public # 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. # 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.respond_to?(:lstat) && data.lstat.size >= USE_100_CONTINUE_PUT_SIZE) || (data.respond_to?(:size) && 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)) request_info(req_hash, RightHttp2xxParser.new) rescue on_exception end # New experimental API for uploading objects, introduced in RightAws 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"} 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 # 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" ) # RightAws::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"} 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 # 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 # 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 # New experimental API for retrieving objects, introduced in RightAws 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. 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 # 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. 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 # 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"} # 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 # Deletes key. Returns +true+ or an exception. # # s3.delete('my_awesome_bucket', 'log/curent/1.log') #=> true # 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 # 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: http://docs.amazonwebservices.com/AmazonS3/2006-03-01/UsingCopyingObjects.html # http://docs.amazonwebservices.com/AmazonS3/2006-03-01/RESTObjectCOPY.html # 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 # 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"} # 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 # 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"} # def rename(src_bucket, src_key, dest_key, headers={}) move(src_bucket, src_key, src_bucket, dest_key, :copy, headers) end # Retieves the ACL (access control policy) for a bucket or object. Returns a hash of headers and xml doc with ACL data. See: http://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 => "\n # 16144ab2929314cc309ffe736daa2b264357476c7fea6efb2c3347ac3ab2792aroot # # 16144ab2929314cc309ffe736daa2b264357476c7fea6efb2c3347ac3ab2792aroot # FULL_CONTROL" } # def get_acl(bucket, key='', headers={}) key = key.right_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 # Retieves the ACL (access control policy) for a bucket or object. # Returns a hash of {:owner, :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"}} # def get_acl_parse(bucket, key='', headers={}) key = key.right_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 => Array(grantee[:permissions]), :attributes => grantee[:attributes] } end end result rescue on_exception end # Sets the ACL on a bucket or object. def put_acl(bucket, key, acl_xml_doc, headers={}) key = key.right_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 # Retieves the ACL (access control policy) for a bucket. Returns a hash of headers and xml doc with ACL data. def get_bucket_acl(bucket, headers={}) return get_acl(bucket, '', headers) rescue on_exception end # Sets the ACL on a bucket only. def put_bucket_acl(bucket, acl_xml_doc, headers={}) return put_acl(bucket, '', acl_xml_doc, headers) rescue on_exception end # Removes all keys from bucket. Returns +true+ or an exception. # # s3.clear_bucket('my_awesome_bucket') #=> true # def clear_bucket(bucket) incrementally_list_bucket(bucket) do |results| results[:contents].each { |key| delete(bucket, key[:key]) } end true rescue on_exception end # Deletes all keys in bucket then deletes bucket. Returns +true+ or an exception. # # s3.force_delete_bucket('my_awesome_bucket') # def force_delete_bucket(bucket) clear_bucket(bucket) delete_bucket(bucket) rescue on_exception end # 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'] # 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 # Retrieves object data only (headers are omitted). Returns +string+ or an exception. # # s3.get('my_awesome_bucket', 'log/curent/1.log') #=> 'Ola-la!' # def get_object(bucket, key, headers={}) get(bucket, key, headers)[:object] rescue on_exception end #----------------------------------------------------------------- # Query API: Links #----------------------------------------------------------------- # Generates link for QUERY API 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 # Generates link for 'ListAllMyBuckets'. # # s3.list_all_my_buckets_link #=> url string # def list_all_my_buckets_link(expires=nil, headers={}) generate_link('GET', headers.merge(:url=>''), expires) rescue on_exception end # Generates link for 'CreateBucket'. # # s3.create_bucket_link('my_awesome_bucket') #=> url string # def create_bucket_link(bucket, expires=nil, headers={}) generate_link('PUT', headers.merge(:url=>bucket), expires) rescue on_exception end # Generates link for 'DeleteBucket'. # # s3.delete_bucket_link('my_awesome_bucket') #=> url string # def delete_bucket_link(bucket, expires=nil, headers={}) generate_link('DELETE', headers.merge(:url=>bucket), expires) rescue on_exception end # Generates link for 'ListBucket'. # # s3.list_bucket_link('my_awesome_bucket') #=> url string # 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.right_blank? generate_link('GET', headers.merge(:url=>bucket), expires) rescue on_exception end # Generates link for 'PutObject'. # # s3.put_link('my_awesome_bucket',key, object) #=> url string # def put_link(bucket, key, data=nil, expires=nil, headers={}) generate_link('PUT', headers.merge(:url=>"#{bucket}/#{CGI::escape key}", :data=>data), expires) 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 http://docs.amazonwebservices.com/AmazonS3/2006-03-01/VirtualHosting.html def get_link(bucket, key, expires=nil, headers={}) generate_link('GET', headers.merge(:url=>"#{bucket}/#{CGI::escape key}"), expires) rescue on_exception end # Generates link for 'HeadObject'. # # s3.head_link('my_awesome_bucket',key) #=> url string # def head_link(bucket, key, expires=nil, headers={}) generate_link('HEAD', headers.merge(:url=>"#{bucket}/#{CGI::escape key}"), expires) rescue on_exception end # Generates link for 'DeleteObject'. # # s3.delete_link('my_awesome_bucket',key) #=> url string # def delete_link(bucket, key, expires=nil, headers={}) generate_link('DELETE', headers.merge(:url=>"#{bucket}/#{CGI::escape key}"), expires) rescue on_exception end # Generates link for 'GetACL'. # # s3.get_acl_link('my_awesome_bucket',key) #=> url string # def get_acl_link(bucket, key='', headers={}) return generate_link('GET', headers.merge(:url=>"#{bucket}/#{CGI::escape key}?acl")) rescue on_exception end # Generates link for 'PutACL'. # # s3.put_acl_link('my_awesome_bucket',key) #=> url string # def put_acl_link(bucket, key='', headers={}) return generate_link('PUT', headers.merge(:url=>"#{bucket}/#{CGI::escape key}?acl")) rescue on_exception end # Generates link for 'GetBucketACL'. # # s3.get_acl_link('my_awesome_bucket',key) #=> url string # def get_bucket_acl_link(bucket, headers={}) return get_acl_link(bucket, '', headers) rescue on_exception end # Generates link for 'PutBucketACL'. # # s3.put_acl_link('my_awesome_bucket',key) #=> url string # def put_bucket_acl_link(bucket, acl_xml_doc, headers={}) return put_acl_link(bucket, '', acl_xml_doc, headers) rescue on_exception end #----------------------------------------------------------------- # PARSERS: #----------------------------------------------------------------- class S3ListAllMyBucketsParser < RightAWSParser # :nodoc: def reset @result = [] @owner = {} end def tagstart(name, attributes) @current_bucket = {} if name == 'Bucket' end def tagend(name) case name when 'ID' then @owner[:owner_id] = @text when 'DisplayName' then @owner[:owner_display_name] = @text when 'Name' then @current_bucket[:name] = @text when 'CreationDate'then @current_bucket[:creation_date] = @text when 'Bucket' then @result << @current_bucket.merge(@owner) end end end class S3ListBucketParser < RightAWSParser # :nodoc: def reset @result = [] @service = {} @current_key = {} end def tagstart(name, attributes) @current_key = {} if name == 'Contents' end def tagend(name) case name # service info when 'Name' then @service['name'] = @text when 'Prefix' then @service['prefix'] = @text when 'Marker' then @service['marker'] = @text when 'MaxKeys' then @service['max-keys'] = @text when 'Delimiter' then @service['delimiter'] = @text when 'IsTruncated' then @service['is_truncated'] = (@text =~ /false/ ? false : true) # key data when 'Key' then @current_key[:key] = @text when 'LastModified'then @current_key[:last_modified] = @text when 'ETag' then @current_key[:e_tag] = @text when 'Size' then @current_key[:size] = @text.to_i when 'StorageClass'then @current_key[:storage_class] = @text when 'ID' then @current_key[:owner_id] = @text when 'DisplayName' then @current_key[:owner_display_name] = @text when 'Contents' @current_key[:service] = @service @result << @current_key end end end class S3ImprovedListBucketParser < RightAWSParser # :nodoc: def reset @result = {} @result[:contents] = [] @result[:common_prefixes] = [] @contents = [] @current_key = {} @common_prefixes = [] @in_common_prefixes = false end def tagstart(name, attributes) @current_key = {} if name == 'Contents' @in_common_prefixes = true if name == 'CommonPrefixes' end def tagend(name) case name # service info when 'Name' then @result[:name] = @text # Amazon uses the same tag for the search prefix and for the entries # in common prefix...so use our simple flag to see which element # we are parsing when 'Prefix' then @in_common_prefixes ? @common_prefixes << @text : @result[:prefix] = @text when 'Marker' then @result[:marker] = @text when 'MaxKeys' then @result[:max_keys] = @text when 'Delimiter' then @result[:delimiter] = @text when 'IsTruncated' then @result[:is_truncated] = (@text =~ /false/ ? false : true) when 'NextMarker' then @result[:next_marker] = @text # key data when 'Key' then @current_key[:key] = @text when 'LastModified'then @current_key[:last_modified] = @text when 'ETag' then @current_key[:e_tag] = @text when 'Size' then @current_key[:size] = @text.to_i when 'StorageClass'then @current_key[:storage_class] = @text when 'ID' then @current_key[:owner_id] = @text when 'DisplayName' then @current_key[:owner_display_name] = @text when 'Contents' then @result[:contents] << @current_key # Common Prefix stuff when 'CommonPrefixes' @result[:common_prefixes] = @common_prefixes @in_common_prefixes = false end end end class S3BucketLocationParser < RightAWSParser # :nodoc: def reset @result = '' end def tagend(name) @result = @text if name == 'LocationConstraint' end end class S3AclParser < RightAWSParser # :nodoc: def reset @result = {:grantees=>[], :owner=>{}} @current_grantee = {} end def tagstart(name, attributes) @current_grantee = { :attributes => attributes } if name=='Grantee' end def tagend(name) case name # service info when 'ID' if @xmlpath == 'AccessControlPolicy/Owner' @result[:owner][:id] = @text else @current_grantee[:id] = @text end when 'DisplayName' if @xmlpath == 'AccessControlPolicy/Owner' @result[:owner][:display_name] = @text else @current_grantee[:display_name] = @text end when 'URI' @current_grantee[:uri] = @text when 'Permission' @current_grantee[:permissions] = @text when 'Grant' @result[:grantees] << @current_grantee end end end class S3LoggingParser < RightAWSParser # :nodoc: def reset @result = {:enabled => false, :targetbucket => '', :targetprefix => ''} @current_grantee = {} end def tagend(name) case name # service info when 'TargetBucket' if @xmlpath == 'BucketLoggingStatus/LoggingEnabled' @result[:targetbucket] = @text @result[:enabled] = true end when 'TargetPrefix' if @xmlpath == 'BucketLoggingStatus/LoggingEnabled' @result[:targetprefix] = @text @result[:enabled] = true end end end end class S3CopyParser < RightAWSParser # :nodoc: def reset @result = {} end def tagend(name) case name when 'LastModified' then @result[:last_modified] = @text when 'ETag' then @result[:e_tag] = @text end end end #----------------------------------------------------------------- # PARSERS: Non XML #----------------------------------------------------------------- class S3HttpResponseParser # :nodoc: attr_reader :result def parse(response) @result = response end def headers_to_string(headers) result = {} headers.each do |key, value| value = value.to_s if value.is_a?(Array) && value.size<2 result[key] = value end result end end class S3HttpResponseBodyParser < S3HttpResponseParser # :nodoc: def parse(response) @result = { :object => response.body, :headers => headers_to_string(response.to_hash) } end end class S3HttpResponseHeadParser < S3HttpResponseParser # :nodoc: def parse(response) @result = headers_to_string(response.to_hash) end end end end