Visual FoxPro

Manage Bucket Storage Class

See more Google Cloud Storage Examples

Demonstrates how to manage a bucket's default storage class.

See Cloud Storage Classes for information about storage classes.

Visual FoxPro

LOCAL lnSuccess
LOCAL loSbToken
LOCAL loJson
LOCAL loHttp
LOCAL lcUrl
LOCAL loResp
LOCAL lnResponseCode

lnSuccess = 0

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

* This example uses a previously obtained access token having permission for the 
* scope "https://www.googleapis.com/auth/cloud-platform"

* In this example, Get Google Cloud Storage OAuth2 Access Token, 
* the service account access token was saved to a text file.  This example fetches the access token from the file..
loSbToken = CreateObject('Chilkat.StringBuilder')
loSbToken.LoadFile("qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8")

* ---- Step 1
* Create the JSON body of the PUT request that will be sent.

* {
*   "storageClass": "[STORAGE_CLASS]"
* }
* 

loJson = CreateObject('Chilkat.JsonObject')
* Be careful if using the "regional" storage class.  See the note below about the 400 error response.
loJson.UpdateString("storageClass","nearline")

* ---- Step 2
* Send a PUT equivalent to this curl command

* curl -X PUT --data-binary @[JSON_FILE_NAME].json \
*     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
*     -H "Content-Type: application/json" \
*     "https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]?fields=storageClass"

loHttp = CreateObject('Chilkat.Http')
loHttp.AuthToken = loSbToken.GetAsString()

loHttp.SetUrlVar("bucket_name","chilkat-ocean")
lcUrl = "https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=storageClass"
loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpJson("PUT",lcUrl,loJson,"application/json",loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loSbToken
    RELEASE loJson
    RELEASE loHttp
    RELEASE loResp
    CANCEL
ENDIF

lnResponseCode = loResp.StatusCode
IF (lnResponseCode = 401) THEN
    ? loResp.BodyStr
    ? "If invalid credentials, then it is likely the access token expired."
    ? "Your app should automatically fetch a new access token and re-try."
    RELEASE loSbToken
    RELEASE loJson
    RELEASE loHttp
    RELEASE loResp
    CANCEL
ENDIF

* On my first try at running this code, I received the following error response:
* Response code: 400
* Response body
* {
*  "error": {
*   "errors": [
*    {
*     "domain": "global",
*     "reason": "invalid",
*     "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
*    }
*   ],
*   "code": 400,
*   "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
*  }
* }
* 

* This was because my storage location was a Multi-regional location, and I tried to assign the "regional" storage class,
* which is not allowed. 

? "Response code: " + STR(lnResponseCode)
? "Response body"
? loResp.BodyStr

* A response code = 200 indicates success, and the response body contains the JSON
* 
* Response code: 200
* Response body
* {
*  "storageClass": "NEARLINE"
* }
* 

RELEASE loSbToken
RELEASE loJson
RELEASE loHttp
RELEASE loResp