B4X

Box.com Upload File

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Demonstrates how to upload a file to box.com. B4X

Dim success As Boolean = False

'  This requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  ------------------------------------------------------------------------------------------
'  Important:
'  See this information about Box.com Service Accounts
'  Box.com will automatically generate a Service Account where the name of the account is the name of your App.� 
'  When you make API calls, it is for this service account, and the files that exist and what you see are not the same as your normal account.
'  ------------------------------------------------------------------------------------------

Dim rest As ChilkatRest
rest.Initialize("rest")

'    Provide a previously obtained OAuth2 access token.
Dim oauth2 As ChilkatOAuth2
oauth2.Initialize("oauth2")
oauth2.AccessToken = "BOX_ACCESS_TOKEN"
rest.SetAuthOAuth2(oauth2)

'  First, make the initial connection.
'  A single REST object, once connected, can be used for many Box REST API calls.
'  The auto-reconnect indicates that if the already-established HTTPS connection is closed,
'  then it will be automatically re-established as needed.
Dim bAutoReconnect As Boolean = True

'  ----------------------------------------------------------------------
'  IMPORTANT: Note that the domain is "upload.box.com", not "api.box.com"
'  ----------------------------------------------------------------------
success = rest.Connect("upload.box.com", 443, True, bAutoReconnect)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If


'  The request body uses the "multipart/form-data" format to transmit two "parts". 
'  The first part is called "attributes" and contains a JSON object with information about the file, including the name of the file 
'  and the ID of the parent folder. The second part contains the contents of the file. 
'  (Note that the name of the second "part" is ignored.)

rest.AddHeader("Content-Type", "multipart/form-data")

'  Provide the content for each part of the request...

'  First the JSON attributes.  Use "0" for the root folder.
'    {"name":"penguins.jpg", "parent":{"id":"0"}}
Dim jsonAttr As ChilkatJsonObject
jsonAttr.Initialize
jsonAttr.UpdateString("name", "penguins.jpg")
jsonAttr.UpdateString("parent.id", "0")

rest.PartSelector = "1"
rest.AddHeader("Content-Disposition", "form-data; name=" & Chr(34) & "attributes" & Chr(34) & "; ")
rest.SetMultipartBodyString(jsonAttr.Emit)

rest.PartSelector = "2"
rest.AddHeader("Content-Disposition", "form-data; name=" & Chr(34) & "file" & Chr(34) & "; filename=" & Chr(34) & "penguins.jpg" & Chr(34))
'  "application/octet-stream" can be safely used for any type file..
rest.AddHeader("Content-Type", "application/octet-stream")

'  Load the file into a binary data object, and then upload..
Dim fileDataObj As ChilkatBinData
fileDataObj.Initialize
fileDataObj.LoadFile("qa_data/jpg/penguins.jpg")
rest.SetMultipartBodyBd(fileDataObj)

'  Restore the PartSelector to "0" (for safety, in case something else sends another request on this object)
rest.PartSelector = "0"

'  Send the multipart/form-data request, which uploads the file contained in fileDataObj
Dim responseBody As String = rest.FullRequestMultipart("POST", "/api/2.0/files/content")
If rest.LastMethodSuccess <> True Then
    Log(rest.LastErrorText)
    Return
End If


'  A 201 is received for a successful upload
If rest.ResponseStatusCode <> 201 Then
    Log("Box.com upload failed.")
    Log("Request header:")
    Log(rest.LastRequestHeader)
    Log("---")
    Log("Response status code = " & rest.ResponseStatusCode)
    Log("Response body:")
    Log(responseBody)
    Return
End If


Log("File uploaded.")