Tcl

REST File Streaming Upload

See more Azure Cloud Storage Examples

Demonstrates how to stream the REST body from a file. This example demonstrates a REST upload to the Azure Cloud Storage service. Tcl

load ./chilkat.dll

set success 0

# 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]

# Set some request headers.
set success [CkRest_AddHeader $rest "x-ms-blob-content-disposition" "attachment; filename=\"hamlet.xml\""]
set success [CkRest_AddHeader $rest "x-ms-blob-type" "BlockBlob"]
set success [CkRest_AddHeader $rest "x-ms-meta-m1" "v1"]
set success [CkRest_AddHeader $rest "x-ms-meta-m2" "v2"]

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

set fileStream [new_CkStream]

CkStream_put_SourceFile $fileStream "qa_data/xml/hamlet.xml"

# Upload to the Azure Cloud Storage service.
# The file is streamed, so the full file never has to completely reside in memory.
# The file is uploaded to the container named "test".
set responseStr [CkRest_fullRequestStream $rest "PUT" "/test/hamlet.xml" $fileStream]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkAuthAzureStorage $azAuth
    delete_CkStream $fileStream
    exit
}

# When successful, the Azure Storage service will respond with a 201 response code,
# with an empty body.  Therefore, in the success condition, the responseStr is empty.
if {[CkRest_get_ResponseStatusCode $rest] == 201} then {
    puts "File uploaded."
} else {
    # 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
delete_CkStream $fileStream