PowerBuilder

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.

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_SbToken
oleobject loo_Json
oleobject loo_Http
string ls_Url
oleobject loo_Resp
integer li_ResponseCode

li_Success = 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..
loo_SbToken = create oleobject
li_rc = loo_SbToken.ConnectToNewObject("Chilkat.StringBuilder")
if li_rc < 0 then
    destroy loo_SbToken
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_SbToken.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]"
// }
// 

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

// Be careful if using the "regional" storage class.  See the note below about the 400 error response.
loo_Json.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"

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")

loo_Http.AuthToken = loo_SbToken.GetAsString()

loo_Http.SetUrlVar("bucket_name","chilkat-ocean")
ls_Url = "https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=storageClass"
loo_Resp = create oleobject
li_rc = loo_Resp.ConnectToNewObject("Chilkat.HttpResponse")

li_Success = loo_Http.HttpJson("PUT",ls_Url,loo_Json,"application/json",loo_Resp)
if li_Success = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_SbToken
    destroy loo_Json
    destroy loo_Http
    destroy loo_Resp
    return
end if

li_ResponseCode = loo_Resp.StatusCode
if li_ResponseCode = 401 then
    Write-Debug loo_Resp.BodyStr
    Write-Debug "If invalid credentials, then it is likely the access token expired."
    Write-Debug "Your app should automatically fetch a new access token and re-try."
    destroy loo_SbToken
    destroy loo_Json
    destroy loo_Http
    destroy loo_Resp
    return
end if

// 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. 

Write-Debug "Response code: " + string(li_ResponseCode)
Write-Debug "Response body"
Write-Debug loo_Resp.BodyStr

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


destroy loo_SbToken
destroy loo_Json
destroy loo_Http
destroy loo_Resp