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(SQL Server) REST through HTTP Proxy

Demonstrates how to connect through an HTTP proxy to make REST API calls.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

// Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
//
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    -- This example connects to a REST server through an HTTP proxy.
    -- It will connect to the Amazon AWS service for this example.
    DECLARE @rest int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Rest', @rest OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @socket int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Socket', @socket OUT

    -- Set the HTTP proxy domain or IP address, and port.
    EXEC sp_OASetProperty @socket, 'HttpProxyHostname', '192.168.1.100'
    EXEC sp_OASetProperty @socket, 'HttpProxyPort', 8088

    -- We want to tell the socket object that we're doing HTTP over the proxy connection.
    -- This is because an HTTP proxy used for other protocols (IMAP, SMTP, SSH, FTP, etc.) 
    -- can require some internal differences in behavior (i.e. how we do things).
    EXEC sp_OASetProperty @socket, 'HttpProxyForHttp', 1

    -- Other properties exist for specifying a proxy login, password, and authentication method (such as NTLM),
    -- but these are not used in this example.

    -- Connect through the HTTP proxy to the Amazon AWS server for the S3 service.
    DECLARE @bTls int
    SELECT @bTls = 1
    DECLARE @port int
    SELECT @port = 443
    DECLARE @maxWaitMs int
    SELECT @maxWaitMs = 5000
    DECLARE @success int
    EXEC sp_OAMethod @socket, 'Connect', @success OUT, 's3.amazonaws.com', @port, @bTls, @maxWaitMs
    IF @success <> 1
      BEGIN

        EXEC sp_OAGetProperty @socket, 'ConnectFailReason', @iTmp0 OUT
        PRINT 'Connect Failure Error Code: ' + @iTmp0
        EXEC sp_OAGetProperty @socket, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @socket
        RETURN
      END

    -- Use the proxied TLS connection:
    EXEC sp_OAMethod @rest, 'UseConnection', @success OUT, @socket, 1
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @socket
        RETURN
      END

    -- Provide AWS credentials for the REST call.
    DECLARE @authAws int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.AuthAws', @authAws OUT

    EXEC sp_OASetProperty @authAws, 'AccessKey', 'AWS_ACCESS_KEY'
    EXEC sp_OASetProperty @authAws, 'SecretKey', 'AWS_SECRET_KEY'
    EXEC sp_OASetProperty @authAws, 'ServiceName', 's3'
    EXEC sp_OAMethod @rest, 'SetAuthAws', @success OUT, @authAws

    -- List all buckets for the account...
    DECLARE @responseXml nvarchar(4000)
    EXEC sp_OAMethod @rest, 'FullRequestNoBody', @responseXml OUT, 'GET', '/'
    EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @socket
        EXEC @hr = sp_OADestroy @authAws
        RETURN
      END

    DECLARE @xml int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Xml', @xml OUT

    EXEC sp_OAMethod @xml, 'LoadXml', @success OUT, @responseXml

    -- Show the full XML returned.
    EXEC sp_OAMethod @xml, 'GetXml', @sTmp0 OUT
    PRINT @sTmp0

    -- Iterate over the buckets, showing each bucket name.
    EXEC sp_OAMethod @xml, 'FindChild2', @success OUT, 'Buckets'
    EXEC sp_OAMethod @xml, 'FirstChild2', @iTmp0 OUT
    IF @iTmp0 = 1
      BEGIN
        EXEC sp_OAMethod @xml, 'GetChildContent', @sTmp0 OUT, 'Name'
        PRINT @sTmp0
        EXEC sp_OAMethod @xml, 'NextSibling2', @iTmp0 OUT
        WHILE (@iTmp0 = 1)
          BEGIN
            EXEC sp_OAMethod @xml, 'GetChildContent', @sTmp0 OUT, 'Name'
            PRINT @sTmp0
          END
      END
    -- Move the internal pointer back to the root node.
    EXEC sp_OAMethod @xml, 'GetRoot2', NULL

    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @socket
    EXEC @hr = sp_OADestroy @authAws
    EXEC @hr = sp_OADestroy @xml


END
GO

 

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