(Visual FoxPro) Upload In-Memory Binary Data to Google Cloud Storage

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

Note: This example requires Chilkat v9.5.0.69 or later because it uses the http.PBinaryBd method.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loSbToken
LOCAL loHttp
LOCAL lcJpgUrl
LOCAL loJpgData
LOCAL lnSuccess
LOCAL lcUrl
LOCAL loResp
LOCAL lnResponseCode

* 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..
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbToken = CreateObject('Chilkat.StringBuilder')
loSbToken.LoadFile("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]"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
loJpgData = CreateObject('Chilkat.BinData')
lnSuccess = loHttp.DownloadBd(lcJpgUrl,loJpgData)
IF (lnSuccess <> 1) THEN
    ? loHttp.LastErrorText
    RELEASE loSbToken
    RELEASE loHttp
    RELEASE loJpgData
    CANCEL
ENDIF

loHttp.AuthToken = loSbToken.GetAsString()

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

* Note: The PBinaryBd method first appears in Chilkat v9.5.0.69
loResp = loHttp.PBinaryBd("POST",lcUrl,loJpgData,"image/jpeg",0,0)
IF (loHttp.LastMethodSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loSbToken
    RELEASE loHttp
    RELEASE loJpgData
    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 loResp
    RELEASE loSbToken
    RELEASE loHttp
    RELEASE loJpgData
    CANCEL
ENDIF

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

* 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="
* }

RELEASE loResp

RELEASE loSbToken
RELEASE loHttp
RELEASE loJpgData