(Lianja) 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.

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// 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("CkStringBuilder")
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]"

loHttp = createobject("CkHttp")

// 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"

loJpgData = createobject("CkBinData")
llSuccess = loHttp.DownloadBd(lcJpgUrl,loJpgData)
if (llSuccess <> .T.) then
    ? loHttp.LastErrorText
    release loSbToken
    release loHttp
    release loJpgData
    return
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",.F.,.F.)
if (loHttp.LastMethodSuccess = .F.) then
    ? loHttp.LastErrorText
    release loSbToken
    release loHttp
    release loJpgData
    return
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
    return
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