(SQL Server) Send JSON REST Request, Get JSON Response

Demonstrates sending a RESTful JSON request, and receiving a JSON response. This example will create a bucket in Google Cloud Storage (which involves sending and receiving JSON).

Note: This example requires Chilkat v11.0.0 or greater.

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
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This example will create a bucket in Google Cloud Storage.

    -- It requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

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

    -- Obtain an access token as shown in one of the following examples:
    -- See Get Access Token using a Service Account JSON Key
    -- See Get Access Token using a P12 File

    DECLARE @rest int
    EXEC @hr = sp_OACreate 'Chilkat.Rest', @rest OUT

    -- Connect using TLS.
    DECLARE @bAutoReconnect int
    SELECT @bAutoReconnect = 1
    EXEC sp_OAMethod @rest, 'Connect', @success OUT, 'www.googleapis.com', 443, 1, @bAutoReconnect

    -- Provide the authentication credentials (i.e. the access key)
    EXEC sp_OAMethod @rest, 'SetAuthGoogle', @success OUT, @gAuth

    -- Build the JSON request body for creating a bucket.
    -- The only required property is the "name", but we'll add more
    -- to make a better example..
    DECLARE @jsonReqBody int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonReqBody OUT

    EXEC sp_OAMethod @jsonReqBody, 'AppendString', @success OUT, 'name', 'chilkat-bucket-c'
    EXEC sp_OAMethod @jsonReqBody, 'AppendString', @success OUT, 'kind', 'storage#bucket'
    EXEC sp_OAMethod @jsonReqBody, 'AppendString', @success OUT, 'location', 'US'

    DECLARE @objVersioning int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @objVersioning OUT

    EXEC sp_OAMethod @jsonReqBody, 'AppendObject2', @success OUT, 'versioning', @objVersioning
    EXEC sp_OAMethod @objVersioning, 'AppendBool', @success OUT, 'enabled', 1

    -- Show the HTTP request body we'll be sending.
    EXEC sp_OAMethod @jsonReqBody, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- Add the required query parameter.
    -- See https://cloud.google.com/storage/docs/json_api/v1/buckets/insert
    EXEC sp_OAMethod @rest, 'AddQueryParam', @success OUT, 'project', 'chilkattest-1050'

    -- Add the Content-Type HTTP request header.
    EXEC sp_OAMethod @rest, 'AddHeader', @success OUT, 'Content-Type', 'application/json; charset=UTF-8'

    DECLARE @jsonResponseStr nvarchar(4000)
    EXEC sp_OAMethod @jsonReqBody, 'Emit', @sTmp0 OUT
    EXEC sp_OAMethod @rest, 'FullRequestString', @jsonResponseStr OUT, 'POST', '/storage/v1/b', @sTmp0
    EXEC sp_OAGetProperty @rest, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @rest, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @gAuth
        EXEC @hr = sp_OADestroy @rest
        EXEC @hr = sp_OADestroy @jsonReqBody
        EXEC @hr = sp_OADestroy @objVersioning
        RETURN
      END

    -- Show the JSON response.  (See below for a sample JSON response.)

    PRINT 'Json Response: ' + @jsonResponseStr

    -- {
    --  "kind": "storage#bucket",
    --  "id": "chilkat-bucket-c",
    --  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket-c",
    --  "projectNumber": "999992999999",
    --  "name": "chilkat-bucket-c",
    --  "timeCreated": "2016-04-29T21:08:10.451Z",
    --  "updated": "2016-04-29T21:08:10.451Z",
    --  "metageneration": "1",
    --  "owner": {
    --   "entity": "project-owners-999992999999"
    --  },
    --  "location": "US",
    --  "versioning": {
    --   "enabled": true
    --  },
    --  "storageClass": "STANDARD",
    --  "etag": "CAE="
    -- }
    -- 

    EXEC @hr = sp_OADestroy @gAuth
    EXEC @hr = sp_OADestroy @rest
    EXEC @hr = sp_OADestroy @jsonReqBody
    EXEC @hr = sp_OADestroy @objVersioning


END
GO