Chilkat Online Tools

ListChangedBlocks TCL Example

Amazon Elastic Block Store

load ./chilkat.dll

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

set rest [new_CkRest]

set authAws [new_CkAuthAws]

CkAuthAws_put_AccessKey $authAws "AWS_ACCESS_KEY"
CkAuthAws_put_SecretKey $authAws "AWS_SECRET_KEY"

# Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
CkAuthAws_put_Region $authAws "us-west-2"
CkAuthAws_put_ServiceName $authAws "ebs"
# SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
CkRest_SetAuthAws $rest $authAws

# URL: https://ebs.us-west-2.amazonaws.com/
# Use the same region as specified above.
set success [CkRest_Connect $rest "ebs.us-west-2.amazonaws.com" 443 1 1]
if {$success != 1} then {
    puts "ConnectFailReason: [CkRest_get_ConnectFailReason $rest]"
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    exit
}

CkRest_AddHeader $rest "Content-Type" "application/x-amz-json-1.1"
CkRest_AddHeader $rest "X-Amz-Target" "ListChangedBlocks"

set sbResponseBody [new_CkStringBuilder]

set success [CkRest_FullRequestNoBodySb $rest "GET" "/snapshots/{secondSnapshotId}/changedblocks" $sbResponseBody]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    delete_CkStringBuilder $sbResponseBody
    exit
}

set respStatusCode [CkRest_get_ResponseStatusCode $rest]
puts "response status code = $respStatusCode"
if {$respStatusCode != 200} then {
    puts "Response Header:"
    puts [CkRest_responseHeader $rest]
    puts "Response Body:"
    puts [CkStringBuilder_getAsString $sbResponseBody]
    delete_CkRest $rest
    delete_CkAuthAws $authAws
    delete_CkStringBuilder $sbResponseBody
    exit
}

set jResp [new_CkJsonObject]

CkJsonObject_LoadSb $jResp $sbResponseBody

# The following code parses the JSON response.
# A sample JSON response is shown below the sample code.

# Use this online tool to generate parsing code from sample JSON:
# Generate Parsing Code from JSON

set BlockSize [CkJsonObject_IntOf $jResp "BlockSize"]
set ExpiryTime [CkJsonObject_IntOf $jResp "ExpiryTime"]
set NextToken [CkJsonObject_stringOf $jResp "NextToken"]
set VolumeSize [CkJsonObject_IntOf $jResp "VolumeSize"]
set i 0
set count_i [CkJsonObject_SizeOfArray $jResp "ChangedBlocks"]
while {$i < $count_i} {
    CkJsonObject_put_I $jResp $i
    set BlockIndex [CkJsonObject_IntOf $jResp "ChangedBlocks[i].BlockIndex"]
    set FirstBlockToken [CkJsonObject_stringOf $jResp "ChangedBlocks[i].FirstBlockToken"]
    set SecondBlockToken [CkJsonObject_stringOf $jResp "ChangedBlocks[i].SecondBlockToken"]
    set i [expr $i + 1]
}

# A sample JSON response body parsed by the above code:

# {
#   "BlockSize": number,
#   "ChangedBlocks": [
#     {
#       "BlockIndex": number,
#       "FirstBlockToken": "string",
#       "SecondBlockToken": "string"
#     }
#   ],
#   "ExpiryTime": number,
#   "NextToken": "string",
#   "VolumeSize": number
# }

delete_CkRest $rest
delete_CkAuthAws $authAws
delete_CkStringBuilder $sbResponseBody
delete_CkJsonObject $jResp