PureBasic

Upload In-Memory Binary Data to Google Cloud Storage

See more Google Cloud Storage Examples

Demonstrates how to upload in-memory binary data to Google Cloud Storage. PureBasic

IncludeFile "CkBinData.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkHttpResponse.pb"

Procedure ChilkatExample()

    success.i = 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..
    sbToken.i = CkStringBuilder::ckCreate()
    If sbToken.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckLoadFile(sbToken,"qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8")

    ; Send a POST equivalent to this curl command.
    ; The content of the file is contained in the request body.

    ; curl -X POST --data-binary @[OBJECT] \
    ;     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
    ;     -H "Content-Type: [OBJECT_CONTENT_TYPE]" \
    ;     "https://www.googleapis.com/upload/storage/v1/b/[BUCKET_NAME]/o?uploadType=media&name=[OBJECT_NAME]"

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

    ; Download a JPG image from the Internet, and then upload this JPG to
    ; a Google Storage bucket.
    jpgUrl.s = "https://www.chilkatsoft.com/images/starfish.jpg"

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

    success = CkHttp::ckDownloadBd(http,jpgUrl,jpgData)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkStringBuilder::ckDispose(sbToken)
        CkHttp::ckDispose(http)
        CkBinData::ckDispose(jpgData)
        ProcedureReturn
    EndIf

    CkHttp::setCkAuthToken(http, CkStringBuilder::ckGetAsString(sbToken))

    ; Construct a URL to upload to an object named "starfish.jpg" in the "chilkat-ocean" bucket.
    CkHttp::ckSetUrlVar(http,"bucket_name","chilkat-ocean")
    CkHttp::ckSetUrlVar(http,"object_name","starfish.jpg")
    url.s = "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}"

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

    success = CkHttp::ckHttpBd(http,"POST",url,jpgData,"image/jpeg",resp)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkStringBuilder::ckDispose(sbToken)
        CkHttp::ckDispose(http)
        CkBinData::ckDispose(jpgData)
        CkHttpResponse::ckDispose(resp)
        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."
        CkStringBuilder::ckDispose(sbToken)
        CkHttp::ckDispose(http)
        CkBinData::ckDispose(jpgData)
        CkHttpResponse::ckDispose(resp)
        ProcedureReturn
    EndIf

    Debug "Response code: " + Str(responseCode)
    Debug "Response body"
    Debug CkHttpResponse::ckBodyStr(resp)

    ; A successful response looks like this:
    ; Response code: 200
    ; Response body
    ; {
    ;  "kind": "storage#object",
    ;  "id": "chilkat-ocean/starfish.jpg/1502670320090292",
    ;  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
    ;  "name": "starfish.jpg",
    ;  "bucket": "chilkat-ocean",
    ;  "generation": "1502670320090292",
    ;  "metageneration": "1",
    ;  "contentType": "image/jpeg",
    ;  "timeCreated": "2017-08-14T00:25:20.040Z",
    ;  "updated": "2017-08-14T00:25:20.040Z",
    ;  "storageClass": "MULTI_REGIONAL",
    ;  "timeStorageClassUpdated": "2017-08-14T00:25:20.040Z",
    ;  "size": "6229",
    ;  "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
    ;  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1502670320090292&alt=media",
    ;  "crc32c": "9RjgwQ==",
    ;  "etag": "CLT5kpW71dUCEAE="
    ; }


    CkStringBuilder::ckDispose(sbToken)
    CkHttp::ckDispose(http)
    CkBinData::ckDispose(jpgData)
    CkHttpResponse::ckDispose(resp)


    ProcedureReturn
EndProcedure