Introduce a new pattern for passing querystring values as a hash

This refactors the gem to no longer build querystrings with string concatenation and, instead, passes a hash to the underlying request library.

This commit only implements the new pattern in the list_servers request to be used as a guideline

lib/fog/aliyun/compute.rb

@@ -351,6 +351,20 @@ def defaultAliyunUri(action, sigNonce, time)
           '?Format=JSON&AccessKeyId=' + @aliyun_accesskey_id + '&Action=' + action + '&SignatureMethod=HMAC-SHA1&RegionId=' + @aliyun_region_id + '&SignatureNonce=' + sigNonce + '&SignatureVersion=1.0&Version=2014-05-26&Timestamp=' + urlTimeFormat
         end
 
+        def defaultAliyunQueryParameters(action, sigNonce, time)
+          {
+            Format: 'JSON',
+            AccessKeyId: @aliyun_accesskey_id,
+            Action: action,
+            SignatureMethod: 'HMAC-SHA1',
+            RegionId: @aliyun_region_id,
+            SignatureNonce: sigNonce,
+            SignatureVersion: '1.0',
+            Version: '2014-05-26',
+            Timestamp: time.strftime('%Y-%m-%dT%H:%M:%SZ')
+          }
+        end
+
         def defaultAliyunVPCUri(action, sigNonce, time)
           parTimeFormat = time.strftime('%Y-%m-%dT%H:%M:%SZ')
           urlTimeFormat = URI.encode(parTimeFormat, ':')
@@ -399,7 +413,14 @@ def defalutVPCParameters(action, sigNonce, time)
         end
 
         # compute signature
+        # This method should be considered deprecated and replaced with sign_without_encoding, which is better for using querystring hashes and not 
+        # building querystrings with string concatination.
         def sign(accessKeySecret, parameters)
+          signature = sign_without_encoding(accessKeySecret, parameters)
+          URI.encode(signature, '/[^!*\'()\;?:@#&%=+$,{}[]<>`" ')
+        end
+
+        def sign_without_encoding(accessKeySecret, parameters)
           sortedParameters = parameters.sort
           canonicalizedQueryString = ''
           sortedParameters.each do |k, v|
@@ -414,9 +435,7 @@ def sign(accessKeySecret, parameters)
           digest = OpenSSL::HMAC.digest(digVer, key, stringToSign)
           signature = Base64.encode64(digest)
           signature[-1] = ''
-          encodedSig = URI.encode(signature, '/[^!*\'()\;?:@#&%=+$,{}[]<>`" ')
-
-          encodedSig
+          signature
         end
       end
     end

lib/fog/aliyun/models/compute/server.rb

@@ -36,7 +36,7 @@ class Server < Fog::Compute::Server
         attribute :expired_at, aliases: 'ExpiredTime'
 
         def image
-          requires image_id
+          requires :image_id
           Fog::Compute::Aliyun::Image.new(service: service).all(imageId: image_id)[0]
         end
 

lib/fog/aliyun/requests/compute/list_server_types.rb

@@ -41,7 +41,7 @@ def get_instance_type(cpuCount, memorySize)
           )
 
           _InstanceTypeId = nil
-          _InstanceTypeList = Fog::JSON.decode(response.body)['InstanceTypes']['InstanceType']
+          _InstanceTypeList = response.body['InstanceTypes']['InstanceType']
           _InstanceTypeList.each do |instance_type|
             next unless (instance_type['CpuCoreCount'] == cpuCount) && (instance_type['MemorySize'] == memorySize)
             _InstanceTypeId = instance_type['InstanceTypeId']

lib/fog/aliyun/requests/compute/list_servers.rb

@@ -11,7 +11,7 @@ def list_servers(options = {})
           _time = Time.new.utc
 
           _parameters = defalutParameters(_action, _sigNonce, _time)
-          _pathURL = defaultAliyunUri(_action, _sigNonce, _time)
+          _query_parameters = defaultAliyunQueryParameters(_action, _sigNonce, _time)
 
           _InstanceId = options[:instanceId]
           _VpcId = options[:vpcId]
@@ -22,35 +22,35 @@ def list_servers(options = {})
           unless _InstanceId.nil?
             _InstanceStr = "[\"#{_InstanceId}\"]"
             _parameters['InstanceIds'] = _InstanceStr
-            _pathURL += '&InstanceIds=' + _InstanceStr
+            _query_parameters[:InstanceIds] = _InstanceStr
           end
 
           unless _VpcId.nil?
             _parameters['VpcId'] = _VpcId
-            _pathURL += '&VpcId=' + _VpcId
+            _query_parameters[:VpcId] = _VpcId
           end
 
           unless _SecurityGroupId.nil?
             _parameters['SecurityGroupId'] = _SecurityGroupId
-            _pathURL += '&SecurityGroupId=' + _SecurityGroupId
+            _query_parameters[:SecurityGroupId] = _SecurityGroupId
           end
 
           unless _PageNumber.nil?
             _parameters['PageNumber'] = _PageNumber
-            _pathURL += '&PageNumber=' + _PageNumber
+            _query_parameters[:PageNumber] = _PageNumber
           end
 
           _PageSize ||= '50'
           _parameters['PageSize'] = _PageSize
-          _pathURL += '&PageSize=' + _PageSize
+          _query_parameters[:PageSize] = _PageSize
 
-          _signature = sign(@aliyun_accesskey_secret, _parameters)
-          _pathURL += '&Signature=' + _signature
+          _signature = sign_without_encoding(@aliyun_accesskey_secret, _parameters)
+          _query_parameters[:Signature] = _signature
 
           request(
             expects: [200, 203],
             method: 'GET',
-            path: _pathURL
+            query: _query_parameters
           )
         end
       end