How to call webservice from TSQL? (SQL SERVER 2000)

Question

I want to call a webservice from TSQL in SQL Server 2000. I tried with the following code:

Declare @Object as Int; 
Declare @ResponseText as Varchar(8000);
Exec sp_OACreate 'MSXML2.XMLHTTP', @Object OUT;
Exec sp_OAMethod @Object, 'open', NULL, 'get','http://server/ws/service1.asmx/Test', 'false';
Exec sp_OAMethod @Object, 'send';
Exec sp_OAMethod @Object, 'responseText', @ResponseText OUTPUT;
Select @ResponseText Resultado;
Exec sp_OADestroy @Object;

For this to work I had to enable Ole Automation:

sp_configure 'show advanced options', 1;
GO
RECONFIGURE;
GO
sp_configure 'Ole Automation Procedures', 1;
GO
RECONFIGURE;
GO

In my test server works fine, the problem is that on the production server to run

sp_configure 'Ole Automation Procedures', 1; 

I get the following error:

The configuration option 'Ole Automation Procedures' does not exist, or it may be an advanced option.

When running

exec sp_configure 

on the test server brings the record "Ole Automation Procedures" on the production server not.

Update

I modify the code to catch the error:

Declare @Object as Int; 
Declare @ResponseText as Varchar(8000);
Exec sp_OACreate 'MSXML2.XMLHTTP', @Object OUT;
Exec sp_OAMethod @Object, 'open', NULL, 'get','http://server/ws/service1.asmx/Test', 'false';
Exec sp_OAMethod @Object, 'send';
Exec sp_OAMethod @Object, 'responseText', @ResponseText OUTPUT;
EXEC sp_OAGetErrorInfo @Object
Select @ResponseText Resultado;
Exec sp_OADestroy @Object;

The instruction "sp_OAGetErrorInfo EXEC @ Object" return: (0x8004271A ) Error in srv_convert.

According to Microsoft ( link ) is a problem of SqlServer. Since in my case the result of the webservice exceed 4000 characters.

How I can call a webservice from TSQL?

Answer 1

I just stumbled upon same error - "(0x8004271A ) Error in srv_convert."

To overcome char limitations, use #tmp table like below:

Create table #tmp(dt nvarchar(max))
insert into #tmp 
exec @hr =sp_OAGetProperty @objWinHttp, 'ResponseText'
Select dt from #tmp -- single column/single row.
Drop Table #tmp -- clean up

Solution Source

Answer 2

heey i have maybe some help for you if you want to call to call a HTTP web service from T-SQL (no SQLCLR) You can automate the XMLHTTP server object using the Object Automation extended stored procedures.

Example

I suggest you use the CLR or an SSIS package though.

Answer 3

I solved it the following way:
Create a VBScript file ( callWS.vbs ) with the following code:

if WScript.Arguments.Count = 1 then
    Set http = CreateObject("Microsoft.XmlHttp")
    http.open "GET", WScript.Arguments(0), FALSE
    http.send ""
    WScript.Echo http.responseText
else
    WScript.Echo "Not was provided the WS address."
end if

Then in TSQL:

declare @Command varchar(100)
declare @RetInfo varchar(8000)
select @Command = 'cscript c:\callWS.vbs "http://server/ws/service1.asmx/Test"'
print @Command
exec @RetInfo = master.dbo.xp_cmdshell @Command
print @RetInfo