SQL Server

Decode 2-digit Hex Escaped

See more HTML-to-XML/Text Examples

Demonstrates how to replace escaped us-ascii chars such as \x7b and \x22 with the chars. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    --  We have the following string with some us-ascii chars escaped like this:
    DECLARE @s nvarchar(4000)
    SELECT @s = '\x7b\x22responseContext\x22:\x7b\x22'

    --  Note: The above escaping does not conform to any standard format (as far as I know).
    --  Chilkat does not have anything to decode from the above.
    --  However, we can 1st transform into a standard format, and then decode..

    --  JSON escapes chars outside us-ascii like this:  "Hello, \ud83d\ude03!"
    --  We can transform the above to this:  "\u007b\u0022responseContext\u0022:\u007b\u0022"
    --  And then decode..

    DECLARE @sb int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sb OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @sb, 'Append', @success OUT, @s
    DECLARE @numReplaced int
    EXEC sp_OAMethod @sb, 'Replace', @numReplaced OUT, '\x', '\u00'

    --  Now decode from "json" escapes
    EXEC sp_OAMethod @sb, 'Decode', @success OUT, 'json', 'utf-8'

    --  Show the decoded string
    EXEC sp_OAMethod @sb, 'GetAsString', @sTmp0 OUT
    PRINT @sTmp0

    --  Here's the result: {"responseContext":{"

    EXEC @hr = sp_OADestroy @sb


END
GO