Xbase++

Upload Binary File from Memory

See more Google Drive Examples

This example demonstrates how to upload a binary file from memory. It uploads the file to a subdirectory of our choosing. Xbase++

LOCAL nSuccess
LOCAL oGAuth
LOCAL oRest
LOCAL nBAutoReconnect
LOCAL oJson
LOCAL oGdCache
LOCAL cFolderId
LOCAL oParents
LOCAL oFac
LOCAL cJsonResponse

nSuccess := 0

nSuccess := 1

//  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 
//  Google Drive scope.

oGAuth := CreateObject("Chilkat.AuthGoogle")
oGAuth:AccessToken := "GOOGLE-DRIVE-ACCESS-TOKEN"

oRest := CreateObject("Chilkat.Rest")

//  Connect using TLS.
nBAutoReconnect := 1
nSuccess := oRest:Connect("www.googleapis.com", 443, 1, nBAutoReconnect)

//  Provide the authentication credentials (i.e. the access token)
oRest:SetAuthGoogle(oGAuth)

//  -------------------------------------------------------------------------
//  A multipart upload to Google Drive needs a multipart/related Content-Type
oRest:AddHeader("Content-Type", "multipart/related")

//  Specify each part of the request.

//  The 1st part is JSON with information about the file.
oRest:PartSelector := "1"
oRest:AddHeader("Content-Type", "application/json; charset=UTF-8")

//  Construct the JSON that will contain the metadata about the file data to be uploaded...
oJson := CreateObject("Chilkat.JsonObject")
oJson:AppendString("name", "hedgehogs.jpg")
oJson:AppendString("description", "A cute photo of two hedgehogs.")
oJson:AppendString("mimeType", "image/jpeg")

//  To place the file in a folder, we must add a parents[] array to the JSON
//  and add the folder ID.  
//  In a previous example (see Build Local Metadata Cache
//  we built a local cache to make it easy to lookup file IDs given a file path.
//  Let's find the file ID for the folder "testFolder/abc/123"
oGdCache := CreateObject("Chilkat.Cache")
oGdCache:Level := 0
oGdCache:AddRoot("C:/ckCache/googleDrive")

cFolderId := oGdCache:FetchText("testFolder/abc/123")
IF (oGdCache:LastMethodSuccess != 1)
    ? "Filepath not found in cache."
    oGAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    oGdCache:destroy()
    RETURN
ENDIF

oParents := CreateObject("Chilkat.JsonArray")
oJson:AppendArray2("parents", oParents)

oParents:AddStringAt(-1, cFolderId)

oRest:SetMultipartBodyString(oJson:Emit())

//  The 2nd part is the file content, which will contain the binary image data.
oRest:PartSelector := "2"
oRest:AddHeader("Content-Type", "image/jpeg")

oFac := CreateObject("Chilkat.FileAccess")

//  Read a JPG file from the local filesystem.
oJpgBytes := oFac:ReadEntireFile("qa_data/jpg/hedgehogs.jpg")

//  Add the bytes to our upload
oRest:SetMultipartBodyBinary(oJpgBytes)

cJsonResponse := oRest:FullRequestMultipart("POST", "/upload/drive/v3/files?uploadType=multipart")
IF (oRest:LastMethodSuccess == 0)
    ? oRest:LastErrorText
    oGAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    oGdCache:destroy()
    oParents:destroy()
    oFac:destroy()
    RETURN
ENDIF

//  A successful response will have a status code equal to 200.
IF (oRest:ResponseStatusCode != 200)
    ? "response status code = " + Str(oRest:ResponseStatusCode)
    ? "response status text = " + oRest:ResponseStatusText
    ? "response header: " + oRest:ResponseHeader
    ? "response JSON: " + cJsonResponse
    oGAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    oGdCache:destroy()
    oParents:destroy()
    oFac:destroy()
    RETURN
ENDIF

//  Show the JSON response.
oJson:Load(cJsonResponse)

//  Show the full JSON response.
oJson:EmitCompact := 0
? oJson:Emit()

//  A successful response looks like this:
//  {
//    "kind": "drive#file",
//    "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
//    "name": "hedgehogs.jpg",
//    "mimeType": "image/jpeg"
//  }

//  Get the fileId:
? "fileId: " + oJson:StringOf("id")

oGAuth:destroy()
oRest:destroy()
oJson:destroy()
oGdCache:destroy()
oParents:destroy()
oFac:destroy()