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(Ruby) Azure Storage: CORS Preflight Blob Request

Azure Storage Blob Service REST API: Sample code to send a CORS pre-flight blob request.

Chilkat Ruby Downloads

Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# Azure Blob Service Example: CORS Preflight Blob Request
# See also: https://msdn.microsoft.com/en-us/library/azure/dn535599.aspx

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

rest = Chilkat::CkRest.new()

# Connect to the Azure Storage Blob Service
bTls = true
port = 443
bAutoReconnect = true
# In this example, the storage account name is "chilkat".
success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

# Provide Azure Cloud credentials for the REST call.
azAuth = Chilkat::CkAuthAzureStorage.new()
azAuth.put_AccessKey("AZURE_ACCESS_KEY")
# The account name used here should match the 1st part of the domain passed in the call to Connect (above).
azAuth.put_Account("chilkat")
azAuth.put_Scheme("SharedKey")
azAuth.put_Service("Blob")
# This causes the "x-ms-version: 2020-08-04" header to be automatically added.
azAuth.put_XMsVersion("2020-08-04")
success = rest.SetAuthAzureStorage(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 preflight blob request requires the following two HTTP headers.
# The Origin is the domain from which the actual request will be issued.
success = rest.AddHeader("Origin","www.contoso.com")
# The Access-Control-Request-Method is the HTTP method (such as GET, POST, PUT, etc.) of the actual request.
success = rest.AddHeader("Access-Control-Request-Method","PUT")

# The expected response is a 202 response status code with no response body.
# The name of the container or blob resource in this example is "test". (Replace "test" with your container name.)
responseStr = rest.fullRequestNoBody("OPTIONS","/test")
if (rest.get_LastMethodSuccess() != true)
    print rest.lastErrorText() + "\n";
    exit
end

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

# If CORS is not enabled or no matching rule is found for the request, 
# then a 403 status code is returned, with the following status text:
# "CORS not enabled or no matching rule found for this request."
if (rest.get_ResponseStatusCode() != 200)
    # Examine the request/response to see what happened.
    print "response status code = " + rest.get_ResponseStatusCode().to_s() + "\n";
    print "response status text = " + rest.responseStatusText() + "\n";
    print "response header: " + rest.responseHeader() + "\n";
    print "response body (if any): " + responseStr + "\n";
    print "---" + "\n";
    print "LastRequestStartLine: " + rest.lastRequestStartLine() + "\n";
    print "LastRequestHeader: " + rest.lastRequestHeader() + "\n";
    exit
end

print "Success: Preflight Blob Request is accepted." + "\n";

 

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