Tcl

Get Container Metadata

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to get the user-defined metadata of a container. Tcl

load ./chilkat.dll

set success 0

# Azure Blob Service Example: Get Container User-Defined Metadata
# See also: https://msdn.microsoft.com/en-us/library/azure/ee691976.aspx

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

set rest [new_CkRest]

# Connect to the Azure Storage Blob Service
set bTls 1
set port 443
set bAutoReconnect 1
# In this example, the storage account name is "chilkat".
set success [CkRest_Connect $rest "chilkat.blob.core.windows.net" $port $bTls $bAutoReconnect]
if {$success != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    exit
}

# Provide Azure Cloud credentials for the REST call.
set azAuth [new_CkAuthAzureStorage]

CkAuthAzureStorage_put_AccessKey $azAuth "AZURE_ACCESS_KEY"
# The account name used here should match the 1st part of the domain passed in the call to Connect (above).
CkAuthAzureStorage_put_Account $azAuth "chilkat"
CkAuthAzureStorage_put_Scheme $azAuth "SharedKey"
CkAuthAzureStorage_put_Service $azAuth "Blob"
# This causes the "x-ms-version: 2021-08-06" header to be automatically added.
CkAuthAzureStorage_put_XMsVersion $azAuth "2021-08-06"
set success [CkRest_SetAuthAzureStorage $rest $azAuth]

# Note: The application does not need to explicitly set the following
# headers: x-ms-date, Authorization.  These headers
# are automatically set by Chilkat.

# The expected success response is a 200 response status code with no response body.
# In this example, we are getting the metadata of the container named "mycontainer".
set responseStr [CkRest_fullRequestNoBody $rest "GET" "/mycontainer?restype=container&comp=metadata"]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkAuthAzureStorage $azAuth
    exit
}

# When successful, the Azure Storage service will respond with a 200 response status code,
# with no response body.

if {[CkRest_get_ResponseStatusCode $rest] != 200} then {
    # Examine the request/response to see what happened.
    puts "response status code = [CkRest_get_ResponseStatusCode $rest]"
    puts "response status text = [CkRest_responseStatusText $rest]"
    puts "response header: [CkRest_responseHeader $rest]"
    puts "response body (if any): $responseStr"
    puts "---"
    puts "LastRequestStartLine: [CkRest_lastRequestStartLine $rest]"
    puts "LastRequestHeader: [CkRest_lastRequestHeader $rest]"
    delete_CkRest $rest
    delete_CkAuthAzureStorage $azAuth
    exit
}

# The user-defined metadata is located in the response header.
# The full response header can be obtained like this:
puts "response header: [CkRest_responseHeader $rest]"
puts "--"

# Metadata headers begin with "x-ms-meta-"
# Individual response header fields can be retrieved like this:
puts "x-ms-meta-Category: [CkRest_responseHdrByName $rest x-ms-meta-Category]"
puts "x-ms-meta-Resolution: [CkRest_responseHdrByName $rest x-ms-meta-Resolution]"

puts "Success."

delete_CkRest $rest
delete_CkAuthAzureStorage $azAuth