Xbase++
Upload File to Google Cloud Storage

Demonstrates how to upload a file to Google Cloud Storage.
Chilkat Xbase++ Downloads

Xbase++
LOCAL nSuccess
LOCAL oJsonToken
LOCAL oHttp
LOCAL oSbPath
LOCAL nNumReplaced
LOCAL oReq
LOCAL oResp
LOCAL nResponseCode

nSuccess := 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"

oJsonToken := CreateObject("Chilkat.JsonObject")
nSuccess := oJsonToken:LoadFile("qa_data/tokens/googleCloudStorage.json")
IF (nSuccess == 0)
    ? oJsonToken:LastErrorText
    oJsonToken:destroy()
    RETURN
ENDIF

//  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]"

oHttp := CreateObject("Chilkat.Http")
oHttp:AuthToken := oJsonToken:StringOf("access_token")

oSbPath := CreateObject("Chilkat.StringBuilder")
oSbPath:Append("/upload/storage/v1/b/bucket_name/o?uploadType=media&name=object_name")
nNumReplaced := oSbPath:Replace("bucket_name", "chilkat-bucket-b")
nNumReplaced := oSbPath:Replace("object_name", "penguins.jpg")

oReq := CreateObject("Chilkat.HttpRequest")
oReq:HttpVerb := "POST"
oReq:Path := oSbPath:GetAsString()
oReq:ContentType := "image/jpeg"
//  Indicate the file to be streamed in the request body when the HTTP POST is sent.
oReq:StreamBodyFromFile("qa_data/jpg/penguins.jpg")

oResp := CreateObject("Chilkat.HttpResponse")
nSuccess := oHttp:HttpSReq("www.googleapis.com", 443, 1, oReq, oResp)
IF (nSuccess == 0)
    ? oHttp:LastErrorText
    oJsonToken:destroy()
    oHttp:destroy()
    oSbPath:destroy()
    oReq:destroy()
    oResp:destroy()
    RETURN
ENDIF

nResponseCode := oResp:StatusCode
IF (nResponseCode == 401)
    ? oResp:BodyStr
    ? "If invalid credentials, then it is likely the access token expired."
    ? "Your app should automatically fetch a new access token and re-try."
    oJsonToken:destroy()
    oHttp:destroy()
    oSbPath:destroy()
    oReq:destroy()
    oResp:destroy()
    RETURN
ENDIF

? "Response code: " + Str(nResponseCode)
? "Response body"
? oResp:BodyStr

//  A successful response looks like this:
//  Response code: 200
//  Response body
//  {
//   "kind": "storage#object",
//   "id": "chilkat-ocean/penguins.jpg/1502643657837855",
//   "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/penguins.jpg",
//   "name": "penguins.jpg",
//   "bucket": "chilkat-ocean",
//   "generation": "1502643657837855",
//   "metageneration": "1",
//   "contentType": "image/jpeg",
//   "timeCreated": "2017-08-13T17:00:57.811Z",
//   "updated": "2017-08-13T17:00:57.811Z",
//   "storageClass": "MULTI_REGIONAL",
//   "timeStorageClassUpdated": "2017-08-13T17:00:57.811Z",
//   "size": "777835",
//   "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
//   "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/penguins.jpg?generation=1502643657837855&alt=media",
//   "crc32c": "ixxYVw==",
//   "etag": "CJ+azOvX1NUCEAE="
//  }

oJsonToken:destroy()
oHttp:destroy()
oSbPath:destroy()
oReq:destroy()
oResp:destroy()