Chilkat Examples

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Tcl Examples

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(Tcl) Upload using Azure Storage Account Shared Access Signature (SAS) Authorization

Sample code to upload binary bytes to a block blob in Azure Cloud Storage using an Azure Storage Account Shared Access Signature (SAS) Authorization. This creates a block blob, or replaces an existing block blob.

Note: The maximum size of a block blob created by uploading in a single step is 64MB. For larger files, the upload must be broken up into blocks. There is another Chilkat example for that..

Note: This example requires Chilkat v9.5.0.65 or later.

Chilkat Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

#  Note: This example requires Chilkat v9.5.0.65 or greater.

#  Azure Blob Service Example: Upload binary bytes to a block blob.
#  This uses a Shared Access Signature (SAS) for Authorization.
#  This creates a new block blob or replaces an existing one in its entirety.
#  See also: https://msdn.microsoft.com/en-us/library/azure/dd179451.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 {[expr $success != 1]} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    exit
}

#  ----------------------------------------------------------------------------------------------
#  The code above this comment could be placed inside a function/subroutine within the application
#  because the connection does not need to be made for every request.  Once the connection is made
#  the app may send many requests..
#  ----------------------------------------------------------------------------------------------

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

#  Let's load a previously computed Azure Storage Account SAS token and use it.
#  See How to Create an Azure Storage Account Shared Access Signature
set sbToken [new_CkStringBuilder]

set success [CkStringBuilder_LoadFile $sbToken "qa_data/tokens/azureStorageAccountSas.txt" "utf-8"]
if {[expr $success != 1]} then {
    puts "Failed to load SAS token."
    delete_CkRest $rest
    delete_CkStringBuilder $sbToken
    exit
}

#  Add the Shared Access Signature query params for authorization.
CkRest_AddQueryParams $rest [CkStringBuilder_getAsString $sbToken]

#  IMPORTANT: Make sure to set the x-ms-blob-type header:
set success [CkRest_AddHeader $rest "x-ms-blob-type" "BlockBlob"]

#  IMPORTANT: Make sure to add the x-ms-date header.
#  When the header name is "x-ms-date", Chilkat will recognize the keyword "NOW"
#  and will substitute the current system date/time formatted as required by Microsoft.
set success [CkRest_AddHeader $rest "x-ms-date" "NOW"]

#  For this example, we'll just load a JPG file into memory..
set binData [new_CkBinData]

set success [CkBinData_LoadFile $binData "qa_data/jpg/starfish.jpg"]
if {[expr $success != 1]} then {
    puts "Failed to load JPG file."
    delete_CkRest $rest
    delete_CkStringBuilder $sbToken
    delete_CkBinData $binData
    exit
}

# Note: The maximum size of a block blob created by uploading in a single step is 64MB.
# For larger files, the upload must be broken up into blocks.  There is another Chilkat example for that..
set sbResponse [new_CkStringBuilder]

set success [CkRest_FullRequestBd $rest "PUT" "/mycontainer/starfish.jpg" $binData $sbResponse]
if {[expr $success != 1]} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkStringBuilder $sbToken
    delete_CkBinData $binData
    delete_CkStringBuilder $sbResponse
    exit
}

#  When successful, the Azure Storage service will respond with a 201 response status code,
#  with no response body.
if {[expr [CkRest_get_ResponseStatusCode $rest] != 201]} 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): [CkStringBuilder_getAsString $sbResponse]"
    puts "---"
    puts "LastRequestStartLine: [CkRest_lastRequestStartLine $rest]"
    puts "LastRequestHeader: [CkRest_lastRequestHeader $rest]"
    puts "Failed."
    delete_CkRest $rest
    delete_CkStringBuilder $sbToken
    delete_CkBinData $binData
    delete_CkStringBuilder $sbResponse
    exit
}

puts "Success."

delete_CkRest $rest
delete_CkStringBuilder $sbToken
delete_CkBinData $binData
delete_CkStringBuilder $sbResponse

 

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