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clsGdrive.cls
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clsGdrive.cls
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Option Compare Database
Option Explicit
Public Event StatusChanged(ByVal Status As String)
Public Event ProgressChange(ByVal Progress As String)
Private Const MAX_CHUNK = 262144
Private sToken As String
Public Property Let Token(NewValue As String)
' Set token for the drive object
sToken = NewValue
End Property
Public Property Get Token() As String
' Set token for the drive object
Token = sToken
End Property
'Simple upload - best for small file to gooogle....
Function SimpleUpload(FileName As String) As Boolean
Dim http As Object, url As String
Dim fileData As String, rspTxt As String
Dim fName As String
If Token = "" Then Exit Function
' get only file name
fName = GetFileName(FileName)
' Get token
url = "https://www.googleapis.com/upload/drive/v2/files?uploadType=media"
' Read and get file
fileData = ReadBinaryFile(FileName)
Dim jSon As New clsJSONScript
'Post the data To the destination URL
'Create XMLHTTP/ServerXMLHTTP/WinHttprequest object
'You can use any of these three objects.
'Set http = CreateObject("WinHttp.WinHttprequest.5")
Set http = CreateObject("MSXML2.XMLHTTP")
With http
'Open URL As POST request
.Open "POST", url, False
'Set Content-Type header
.SetRequestHeader "Authorization", Token
.SetRequestHeader "Content-Type", GetMimeType(fName)
.SetRequestHeader "Content-Length", GetFileSize(FileName)
'Send the form data To URL As POST binary request
.Send (fileData)
rspTxt = .ResponseText
If .Status <> 200 Then
'// Error getting OAuth2 token
'err.Raise vbObjectError + .Status, Description:="Failed to retrieve data " + .Status & ": " + .ResponseText
SimpleUpload = False
GoTo ErrHandler
End If
SimpleUpload = True
' Now we have to change the file name to the orginal file...
url = "https://www.googleapis.com/drive/v2/files/" & GetFileID(rspTxt)
.Open "PATCH", url, False
.SetRequestHeader "Authorization", Token
.SetRequestHeader "Content-type", "application/json"
.Send (Utf8BytesFromString("{'title': '" & fName & "'}"))
rspTxt = .ResponseText
If .Status <> 200 Then
'// Error getting OAuth2 token
'err.Raise vbObjectError + .Status, Description:="Failed to retrieve data " + .Status & ": " + .ResponseText
SimpleUpload = False
'Debug.Print .ResponseText
GoTo ErrHandler
End If
End With
ErrHandler:
Err.clear
Set http = Nothing
Set jSon = Nothing
End Function
Public Function UnicodeToAscii(sText As String) As String
Dim x As Long, sAscii As String, ascval As Long
If Len(sText) = 0 Then
Exit Function
End If
sAscii = ""
For x = 1 To Len(sText)
ascval = AscW(Mid(sText, x, 1))
If (ascval < 0) Then
ascval = 65536 + ascval ' http://support.microsoft.com/kb/272138
End If
sAscii = sAscii & "&#" & ascval & ";"
Next
UnicodeToAscii = sAscii
End Function
Private Function GetFileID(JSONText As String)
' This will find the recently updated file
Dim JsonScript As New clsJSONScript
Dim jsObj As Object
With JsonScript
Set jsObj = .DecodeJsonString(JSONText)
GetFileID = .GetProperty(jsObj, "id")
End With
Set JsonScript = Nothing
End Function
Private Function InsertFile(FileName As String, Optional ByVal bAsync As Boolean) As String
Dim nFile As Integer
Dim baBuffer() As Byte
Dim sPostData As String
Dim sUrl As String, Token As String
' Get token
sUrl = "https://www.googleapis.com/upload/drive/v2/files?uploadType=multipart"
Const Boundary = "314159265358979323846"
Const delimiter = vbCrLf & "--" + Boundary + vbCrLf
Const close_delim = vbCrLf + "--" + Boundary + "--"
Dim base64Data As String, bodyRequest As String
Dim MetaData As String, ContentType As String, body As String
' For reading file
'--- read file
nFile = FreeFile
Open FileName For Binary Access Read As nFile
If LOF(nFile) > 0 Then
ReDim baBuffer(0 To LOF(nFile) - 1) As Byte
Get nFile, , baBuffer
sPostData = StrConv(baBuffer, vbUnicode)
End If
Close nFile
' add variable
'contentType = "Application/octet-stream"
ContentType = "application/msword"
MetaData = "{'title':'" & GetFileName(FileName) & "','mimeType':'application/msword'}"
MetaData = Replace(MetaData, "'", """")
' convert file to base64data
'base64Data = Base64EncodeString(GetFile(filename))
base64Data = GetFileText(FileName)
body = delimiter
body = body + "X-Upload-Content-Type: application/json" + vbCrLf + vbCrLf
body = body + MetaData
body = body + delimiter
body = body + "Content-Type: " + ContentType + vbCrLf
'body = body + "Content-Transfer-Encoding: base64" + vbCrLf
'body = body + vbCrLf
body = body + base64Data + close_delim
'--- post
Dim Xhr As Object
Set Xhr = CreateObject("Microsoft.XMLHTTP")
With Xhr
.Open "POST", sUrl, bAsync
.SetRequestHeader "Authorization", Token
.SetRequestHeader "Content-Type", "multipart/related; boundary=""" + Boundary + """"
.SetRequestHeader "Content-Length", GetFileSize(FileName)
.SetRequestHeader "User-Agent", VbAgent
.Send (body)
If .Status <> 200 Then
'// Error getting OAuth2 token
'Debug.Print .ResponseText
End If
If Not bAsync Then
InsertFile = .ResponseText
End If
'WriteLog insertFile, "C:\dumpfile.txt"
End With
Set Xhr = Nothing
End Function
Private Function pvPostFile(sFileName As String, Optional ByVal bAsync As Boolean) As String
Dim nFile As Integer
Dim baBuffer() As Byte
Dim sPostData As String
Dim sUrl As String, Token As String, Xhr As Object
' multipart posting of file does not work as expected
sUrl = "https://www.googleapis.com/upload/drive/v2/files?uploadType=multipart"
'--- read file
nFile = FreeFile
Open sFileName For Binary Access Read As nFile
If LOF(nFile) > 0 Then
ReDim baBuffer(0 To LOF(nFile) - 1) As Byte
Get nFile, , baBuffer
sPostData = StrConv(baBuffer, vbUnicode)
End If
Close nFile
' for meta data part
Dim MetaHeader As Variant
Dim sFormData As String, d As String, headerJson As String
Const Boundary = "foo_bar_baz"
Const delimiter = "\r\n--" + Boundary + "\r\n"
Const close_delim = "\r\n--" + Boundary + "--"
MetaHeader = Array("'title':'MyWordfile.doc'", "'description':'ntohing special'", "'mimeType':'application/msword'")
'--- prepare body
sPostData = "--" & Boundary & vbCrLf & sPostData & vbCrLf & "--" & Boundary & "--"
sPostData = Join(MetaHeader) & vbCrLf & "--" & Boundary & vbCrLf & sPostData & vbCrLf & "--" & Boundary & "--"
'--- post
Set Xhr = CreateObject("Microsoft.XMLHTTP")
With Xhr
.Open "POST", sUrl, bAsync
.SetRequestHeader "Authorization", Token
.SetRequestHeader "Content-Type", "multipart/related; boundary='" + Boundary + "'"
.SetRequestHeader "X-Upload-Content-Length", GetFileSize(sFileName)
.SetRequestHeader "X-Upload-Content-Type", "application/msword"
.Send pvToByteArray(sPostData)
If Not bAsync Then
pvPostFile = .ResponseText
End If
'WriteLog pvPostFile, "C:\dumpfile.txt"
End With
exitfunction:
Set Xhr = Nothing
End Function
Private Function pvToByteArray(sText As String) As Byte()
pvToByteArray = StrConv(sText, vbFromUnicode)
End Function
Function UploadResumable(FileName As String, Optional FileID As String = "") As Boolean
Dim params As String, Xhr As Object, res As String, urls As String, method As String, mimeType As String
' set up parameter for the upload
If Token = "" Then Exit Function
'Step 1: Start a resumable session
'params = "alt=json"
params = params + "&uploadType=resumable"
urls = "https://www.googleapis.com/upload/drive/v2/files"
If FileID <> "" Then
params = params + "&setModifiedDate=true"
urls = urls + FileID
method = "PUT"
Else
method = "POST"
End If
' this will breake parameter into ?uploadtype ... type?fiel=...&item=...
urls = urls + "?" + params
' set up request header
mimeType = GetMimeType(FileName)
Set Xhr = CreateObject("MSXML2.XMLHTTP")
With Xhr
.Open method, urls, False
.SetRequestHeader "Content-Type", "application/json; charset=UTF-8"
.SetRequestHeader "Authorization:", Token
.SetRequestHeader "X-Upload-Content-Type", mimeType
'.Setrequestheader "X-Upload-Content-Length", GetFileSize(FileName)
.SetRequestHeader "User-Agent", VbAgent
RaiseEvent StatusChanged("Handshaking with Google Drive APIs...")
.Send (Utf8BytesFromString("{'title': '" & GetFileName(FileName) & "'}"))
'Debug.Print .ResponseText
' check for error
If .Status <> 200 Then
' check for error type and response to user
GoTo exitfunction
End If
End With
'Step 2: Save the resumable session URI
urls = Xhr.getResponseHeader("Location")
'Step 3: Upload the file
method = "PUT"
With Xhr
.Open method, urls, False
.SetRequestHeader "Authorization:", Token
.SetRequestHeader "Content-Type", mimeType
.SetRequestHeader "Content-Length", GetFileSize(FileName)
.SetRequestHeader "User-Agent", VbAgent
RaiseEvent StatusChanged("Start sending file...")
.Send (ReadBinaryFile(FileName))
'If the request succeeds, responds is HTTP 201 Created
', along with any metadata associated with this resource.
'If the initial request of the resumable session had been a PUT, to update an existing resource,
'the success response would be 200 OK, along with any metadata associated with this resource.
'If the upload request is interrupted or if you receive an HTTP 503 Service Unavailable
'or any other 5xx response from the server, follow the procedure outlined in resume an interrupted upload.
'Debug.Print .ResponseText
If .Status <> 200 Then
' check for error type and response to user
GoTo exitfunction
End If
End With
RaiseEvent StatusChanged("File uploaded succesffully...")
UploadResumable = True
exitfunction:
Set Xhr = Nothing
End Function
Function DownloadMedia(FileID As String, SaveFileName As String) As Boolean
Dim Xhr As Object, method As String, urls As String, xFileName As String
If Token = "" Then Exit Function
xFileName = GetFileName(SaveFileName)
urls = "https://www.googleapis.com/drive/v2/files/"
method = "+G+E+T+"
urls = urls + FileID + "?alt=media"
Set Xhr = CreateObject("MSXML2.XMLHTTP")
With Xhr
.Open Replace(method, "+", ""), urls, False
.SetRequestHeader "Authorization:", Token
.SetRequestHeader "Content-Type", GetMimeType(SaveFileName)
RaiseEvent StatusChanged("Send request for downloading of file[" + xFileName + "]...")
.Send
'Wait for request to finish
RaiseEvent StatusChanged("Waiting for responses...")
Do While .readyState <> 4
DoEvents
Loop
' check for error
If .Status <> 200 Then
' check for error type and response to user
GoTo exitfunction
End If
RaiseEvent StatusChanged("Got the file, now saving...")
' get location uri if successfully
WriteFileBinary SaveFileName, .ResponseBody
End With
RaiseEvent StatusChanged("Downloading of [" + xFileName + "] was successfull...")
DownloadMedia = True
exitfunction:
Set Xhr = Nothing
End Function
Function Download(FileID As String, SaveFileName As String) As Boolean
Dim Xhr As Object, method As String, urls As String, xFileName As Stream
Dim jSon As New clsJSONScript, jsObj As Object
If Token = "" Then Exit Function
xFileName = GetFileName(SaveFileName)
urls = "https://www.googleapis.com/drive/v2/files/"
method = "+G+E+T+"
urls = urls + FileID + "?fields=downloadUrl,title"
Set Xhr = CreateObject("MSXML2.XMLHTTP")
With Xhr
' First step to get download url
.Open Replace(method, "+", ""), urls, False
.SetRequestHeader "Authorization:", Token
RaiseEvent StatusChanged("Send request for downloading of file[" + xFileName + "]...")
.Send
'Wait for request to finish
WaitMe Xhr
' check for error
If .Status <> 200 Then
' check for error type and response to user
GoTo exitfunction
End If
Set jsObj = jSon.DecodeJsonString(.ResponseText)
' now start download the file
RaiseEvent StatusChanged("Retrieving download url...")
urls = jSon.GetProperty(jsObj, "downloadUrl")
Set jSon = Nothing
'Now using that url and download the file
.Open Replace(method, "+", ""), urls, False
.SetRequestHeader "Authorization:", Token
RaiseEvent StatusChanged("Request for download...")
.Send
'Wait for request to finish
WaitMe Xhr
'
' check for error
If .Status <> 200 Then
' check for error type and response to user
GoTo exitfunction
End If
'Debug.Print .getAllResponseHeaders()
' Now save file
RaiseEvent StatusChanged("Downloaded, saving file...")
WriteFileBinary SaveFileName, .ResponseBody
End With
RaiseEvent StatusChanged("Download of file [" + xFileName + "] completed...")
Download = True
exitfunction:
Set Xhr = Nothing
End Function
Private Sub WaitMe(Obj As Object)
Do While Obj.readyState <> 4
DoEvents
Loop
End Sub
Function UploadChunk(FileName As String, Optional FileID As String = "", Optional ParentID As String) As Boolean
Dim params As String, Xhr As Object, res As String, urls As String, method As String, mimeType As String
Dim Meta As String
' set up parameter for the upload
If Token = "" Then Exit Function
'Step 1: Start a resumable session
'params = "alt=json"
params = params + "&uploadType=resumable"
urls = "https://www.googleapis.com/upload/drive/v2/files"
If FileID <> "" Then
params = params + "&setModifiedDate=true"
urls = urls + FileID
method = "PUT"
Else
method = "POST"
End If
' this will breake parameter into ?uploadtype ... type?fiel=...&item=...
urls = urls + "?" + params
' Prepare for meta
If ParentID <> "" Then
Meta = "{'title':'" + GetFileName(FileName) + "','parents':[{'id':'" + ParentID + "'}]}"
Else
Meta = "{'title': '" & GetFileName(FileName) & "'}"
End If
' get mimetype
mimeType = GetMimeType(FileName)
Set Xhr = CreateObject("MSXML2.XMLHTTP")
With Xhr
.Open method, urls, False
.SetRequestHeader "Content-Type", "application/json; charset=UTF-8"
.SetRequestHeader "Authorization:", Token
.SetRequestHeader "X-Upload-Content-Type", mimeType
'.Setrequestheader "X-Upload-Content-Length", GetFileSize(FileName)
.SetRequestHeader "User-Agent", VbAgent
RaiseEvent StatusChanged(Msg("MSG_REQUESTING_UPLOAD_HANDLE"))
.Send (Utf8BytesFromString(Meta))
' check for error
If .Status <> 200 Then
' check for error type and response to user
GoTo exitfunction
End If
End With
'Step 2: Save the resumable session URI
urls = Xhr.getResponseHeader("Location")
RaiseEvent StatusChanged(Msg("MSG_UPLOAD_HANDLE_RETRIEVED"))
'Step 3: Upload the file
If PostBinaryChunks(Xhr, urls, FileName) Then
' successfully uploaded all
UploadChunk = True
RaiseEvent StatusChanged(Replace(Msg("MSG_UPLOAD_DONE_SUCCESSFULL"), "%%", "[" + FileName + "]"))
Else
' failed at some point...
RaiseEvent StatusChanged(Msg("MSG_UPLOAD_FAILED"))
End If
exitfunction:
Set Xhr = Nothing
End Function
Private Function PostBinaryChunks(xhrObject As Object, url As String, FileName As String, Optional ChunkSize As Long = MAX_CHUNK) As Boolean
'// Push 'intChunkSize' chunks to client. When near EOS, Read() will terminate at EOS regardless of being asked to read passed EOS
Dim objStream As Object, bntCount As Long, uFileSize As Long, uFileMimeType As String
Dim totalTrunks As Long, i As Long, RmnByte As Long
Const Retries = 5
Set objStream = CreateObject("ADODB.Stream")
With objStream
.Open
.Type = adTypeBinary
.LoadFromFile FileName
uFileSize = GetFileSize(FileName)
uFileMimeType = GetMimeType(FileName)
totalTrunks = (uFileSize / ChunkSize) + 1
ResumeUpload:
While Not .EOS
' upload in trunk
DoEvents
If MakeRequest(xhrObject, url, bntCount * ChunkSize, .Read(ChunkSize), uFileSize, uFileMimeType) Then
RaiseEvent ProgressChange(Format(100 * (bntCount + 1) / totalTrunks, "Standard") & "%")
Else
' Failed at some point, now get the remained byte and tried 5 times
While i <= Retries
Exponential_backoff
RmnByte = QuerryRemainBytes(xhrObject, url, uFileSize)
If RmnByte > 0 Then
' good - server on again
objStream.Position = RmnByte + 1
i = Retries
RaiseEvent StatusChanged(Replace(Msg("MSG_RESUME_FAILED_UPLOAD"), "%%", "[" + FileName + "]"))
GoTo ResumeUpload
End If
i = i + 1
Wend
' seemed no luck after retrying... tell permanent error
RaiseEvent StatusChanged(Replace(Msg("MSG_UPLOAD_CRITICAL_ERROR_ABORTED"), "%%", "[" + FileName + "]"))
GoTo ExitProc
End If
' get return number to re-read
bntCount = bntCount + 1
Wend
PostBinaryChunks = True
RaiseEvent StatusChanged("Uploading completed...")
End With
ExitProc:
Set objStream = Nothing
End Function
Private Function Exponential_backoff()
Sleep 1000 + Int(Rnd(1) * 100)
'Wait 1 second + random_number_milliseconds and retry the request.
End Function
Private Function MakeRequest(xhrObject As Object, url As String, _
start As Long, body As Variant, Optional FileLength As Long, _
Optional strMimeType As String) As Boolean
' this function will make a range request header for chunk uploading and forward the data
Dim reg As Object, reqSize As Long
On Error GoTo ErrProc
With xhrObject
.Open "PUT", url, False
'.Setrequestheader "Authorization:", Token
' set length of transfered bytes
.SetRequestHeader "Content-Length", MAX_CHUNK
' still mimetype
.SetRequestHeader "Content-Type", strMimeType
reqSize = UBound(body) + 1
If reqSize <> 0 Then
.SetRequestHeader "Content-Range", "bytes " & start & "-" & start + reqSize - 1 & "/" & FileLength
Else
.SetRequestHeader "Content-Range", "bytes */" & FileLength
End If
.SetRequestHeader "User-Agent", VbAgent
.Send (body)
Select Case .Status
Case 308: ' still continuing
' Remember the current chunk for later resuming of the upload
'Debug.Print .getResponseHeader("Range")
Case 201, 200: ' finish the file
'Debug.Print .getAllResponseHeaders
Case 500, 502, 503, 504: 'may be an error
' tell the uploader to retry later
GoTo ErrProc
End Select
End With
MakeRequest = True
ErrProc:
End Function
Private Function QuerryRemainBytes(xhrObject As Object, url As String, FileSize As Long) As Long
' This function will query Google to get the remained bytes was not uploaded
Dim tmpStr As String
'On Error GoTo ErrProc
With xhrObject
' Just follow google guide on this
'PUT {session_uri} HTTP/1.1
'Content-Length: 0
'Content-Range: bytes */2000000
.Open "PUT", url, False
.SetRequestHeader "Content-Length", 0
.SetRequestHeader "Content-Range", "bytes */" & FileSize
.SetRequestHeader "User-Agent", VbAgent
.Send
'If successfully, following is the returned data
'HTTP/1.1 308 Resume Incomplete
'Content-Length: 0
'Range: 0-42
Select Case .Status
Case 308: ' still continuing
' Remember the current chunk for later resuming of the upload
tmpStr = .getResponseHeader("Range")
QuerryRemainBytes = Val(Mid(tmpStr, InStr(tmpStr, "-") + 1))
Case 201, 200: ' finish the file
Case 500, 502, 503, 504: 'may be an error
' tell the uploader to retry later
GoTo ErrProc
End Select
End With
ErrProc:
End Function