(PureBasic) Google Cloud Storage List Buckets

See more Google Cloud Storage Examples

Demonstrates how to retrieve a list of buckets for a given project.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkHttpResponse.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkJsonObject.pb"

Procedure ChilkatExample()

    ; 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"

    jsonToken.i = CkJsonObject::ckCreate()
    If jsonToken.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkJsonObject::ckLoadFile(jsonToken,"qa_data/tokens/googleCloudStorage.json")
    If success = 0
        Debug CkJsonObject::ckLastErrorText(jsonToken)
        CkJsonObject::ckDispose(jsonToken)
        ProcedureReturn
    EndIf

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttp::setCkAuthToken(http, CkJsonObject::ckStringOf(jsonToken,"access_token"))

    ; For more info see Cloud Storage Documentation - Buckets: list 
    ; 
    success = CkHttp::ckSetUrlVar(http,"PROJECT_ID","chilkattest-1050")
    resp.i = CkHttp::ckQuickGetObj(http,"https://www.googleapis.com/storage/v1/b?project={$PROJECT_ID}")
    If CkHttp::ckLastMethodSuccess(http) = 0
        Debug CkHttp::ckLastErrorText(http)
        CkJsonObject::ckDispose(jsonToken)
        CkHttp::ckDispose(http)
        ProcedureReturn
    EndIf

    responseCode.i = CkHttpResponse::ckStatusCode(resp)
    If responseCode = 401
        Debug CkHttpResponse::ckBodyStr(resp)
        Debug "If invalid credentials, then it is likely the access token expired."
        Debug "Your app should automatically fetch a new access token and re-try."
        CkHttpResponse::ckDispose(resp)

        CkJsonObject::ckDispose(jsonToken)
        CkHttp::ckDispose(http)
        ProcedureReturn
    EndIf

    Debug "Response code: " + Str(responseCode)
    Debug "Response body"

    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkJsonObject::ckLoad(json,CkHttpResponse::ckBodyStr(resp))
    CkHttpResponse::ckDispose(resp)

    CkJsonObject::setCkEmitCompact(json, 0)

    Debug CkJsonObject::ckEmit(json)

    ; A response code = 200 indicates success, and the response body contains JSON such as this:

    ; {
    ;   "kind": "storage#buckets",
    ;   "items": [
    ;     {
    ;       "kind": "storage#bucket",
    ;       "id": "chilkat-bucket",
    ;       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket",
    ;       "projectNumber": "5332332985",
    ;       "name": "chilkat-bucket",
    ;       "timeCreated": "2018-10-23T00:04:44.507Z",
    ;       "updated": "2018-10-23T00:04:44.507Z",
    ;       "metageneration": "1",
    ;       "iamConfiguration": {
    ;         "bucketPolicyOnly": {
    ;           "enabled": false
    ;         }
    ;       },
    ;       "location": "US",
    ;       "storageClass": "MULTI_REGIONAL",
    ;       "etag": "CAE="
    ;     },
    ;     {
    ;       "kind": "storage#bucket",
    ;       "id": "chilkat-images",
    ;       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-images",
    ;       "projectNumber": "5332332985",
    ;       "name": "chilkat-images",
    ;       "timeCreated": "2018-10-23T11:24:43.000Z",
    ;       "updated": "2018-10-23T11:24:43.000Z",
    ;       "metageneration": "1",
    ;       "iamConfiguration": {
    ;         "bucketPolicyOnly": {
    ;           "enabled": false
    ;         }
    ;       },
    ;       "location": "US",
    ;       "storageClass": "MULTI_REGIONAL",
    ;       "etag": "CAE="
    ;     }
    ;   ]
    ; }

    ; Use this online tool to generate parsing code from sample JSON: 
    ; Generate Parsing Code from JSON

    kind.s
    i.i
    count_i.i
    id.s
    selfLink.s
    projectNumber.s
    name.s
    timeCreated.s
    updated.s
    metageneration.s
    iamConfigurationBucketPolicyOnlyEnabled.i
    location.s
    storageClass.s
    etag.s

    kind = CkJsonObject::ckStringOf(json,"kind")
    i = 0
    count_i = CkJsonObject::ckSizeOfArray(json,"items")
    While i < count_i
        CkJsonObject::setCkI(json, i)
        kind = CkJsonObject::ckStringOf(json,"items[i].kind")
        id = CkJsonObject::ckStringOf(json,"items[i].id")
        selfLink = CkJsonObject::ckStringOf(json,"items[i].selfLink")
        projectNumber = CkJsonObject::ckStringOf(json,"items[i].projectNumber")
        name = CkJsonObject::ckStringOf(json,"items[i].name")
        timeCreated = CkJsonObject::ckStringOf(json,"items[i].timeCreated")
        updated = CkJsonObject::ckStringOf(json,"items[i].updated")
        metageneration = CkJsonObject::ckStringOf(json,"items[i].metageneration")
        iamConfigurationBucketPolicyOnlyEnabled = CkJsonObject::ckBoolOf(json,"items[i].iamConfiguration.bucketPolicyOnly.enabled")
        location = CkJsonObject::ckStringOf(json,"items[i].location")
        storageClass = CkJsonObject::ckStringOf(json,"items[i].storageClass")
        etag = CkJsonObject::ckStringOf(json,"items[i].etag")
        i = i + 1
    Wend


    CkJsonObject::ckDispose(jsonToken)
    CkHttp::ckDispose(http)
    CkJsonObject::ckDispose(json)


    ProcedureReturn
EndProcedure