(Visual FoxPro) Dropbox File Streaming Upload

Upload a file to Drobox using a file stream. This example can upload files up to 150MB. Larger files must be uploaded with an upload session (upload_session/start).

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loRest
LOCAL lnSuccess
LOCAL loJson
LOCAL loFileStream
LOCAL lcResponseStr
LOCAL loJsonResp
LOCAL lnSize
LOCAL lcRev
LOCAL lcClientModified
LOCAL loCkdt
LOCAL lnBLocalTime
LOCAL loDt

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

*  A Dropbox access token should have been previously obtained.
*  Dropbox access tokens do not expire.
*  See Dropbox Access Token.

loRest = CreateObject('Chilkat_9_5_0.Rest')

*  Connect to Dropbox
lnSuccess = loRest.Connect("content.dropboxapi.com",443,1,1)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    CANCEL
ENDIF

*  Add request headers.
loRest.AddHeader("Content-Type","application/octet-stream")
loRest.AddHeader("Authorization","Bearer DROPBOX_ACCESS_TOKEN")

*  The upload "parameters" contained in JSON passed in an HTTP request header.
*  This is the JSON to be added in this example:
*  {
*     "path": "/Homework/lit/hamlet.xml",
*     "mode": "add",
*     "autorename": true,
*     "mute": false
*  }

loJson = CreateObject('Chilkat_9_5_0.JsonObject')
loJson.AppendString("path","/Homework/lit/hamlet.xml")
loJson.AppendString("mode","add")
loJson.AppendBool("autorename",1)
loJson.AppendBool("mute",0)
loRest.AddHeader("Dropbox-API-Arg",loJson.Emit())

*  Almost ready to go...
*  Let's setup a file stream to point to a file.
loFileStream = CreateObject('Chilkat_9_5_0.Stream')
loFileStream.SourceFile = "qa_data/xml/hamlet.xml"

*  Do the upload.  The URL is https://content.dropboxapi.com/2/files/upload.
*  We already connected to content.dropboxapi.com using TLS (i.e. HTTPS),
*  so now we only need to specify the path "/2/files/upload".

*  Note: The file is streamed directly from disk.  (The entire
*  file will not be loaded into memory.)
lcResponseStr = loRest.FullRequestStream("POST","/2/files/upload",loFileStream)
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loJson
    RELEASE loFileStream
    CANCEL
ENDIF

*  When successful, Dropbox responds with a 200 response code.
IF (loRest.ResponseStatusCode <> 200) THEN
    *  Examine the request/response to see what happened.
    ? "response status code = " + STR(loRest.ResponseStatusCode)
    ? "response status text = " + loRest.ResponseStatusText
    ? "response header: " + loRest.ResponseHeader
    ? "response body (if any): " + lcResponseStr
    ? "---"
    ? "LastRequestStartLine: " + loRest.LastRequestStartLine
    ? "LastRequestHeader: " + loRest.LastRequestHeader
    RELEASE loRest
    RELEASE loJson
    RELEASE loFileStream
    CANCEL
ENDIF

*  The response is JSON.
loJsonResp = CreateObject('Chilkat_9_5_0.JsonObject')
loJsonResp.EmitCompact = 0
loJsonResp.Load(lcResponseStr)

*  Show the JSON response.
? loJsonResp.Emit()

*  Returns JSON that looks like this:
*  {
*    "name": "hamlet.xml",
*    "path_lower": "/homework/lit/hamlet.xml",
*    "path_display": "/Homework/lit/hamlet.xml",
*    "id": "id:74FkdeNuyKAAAAAAAAAAAQ",
*    "client_modified": "2016-06-02T23:19:00Z",
*    "server_modified": "2016-06-02T23:19:00Z",
*    "rev": "9482db15f",
*    "size": 279658
*  }

*  Sample code to get data from the JSON response:
lnSize = loJsonResp.IntOf("size")
? "size = " + STR(lnSize)

lcRev = loJsonResp.StringOf("rev")
? "rev = " + lcRev

lcClientModified = loJsonResp.StringOf("client_modified")
loCkdt = CreateObject('Chilkat_9_5_0.CkDateTime')
loCkdt.SetFromTimestamp(lcClientModified)
lnBLocalTime = 1
loDt = loCkdt.GetDtObj(lnBLocalTime)
? STR(loDt.Day) + "/" + STR(loDt.Month) + "/" + STR(loDt.Year) + " " + STR(loDt.Hour) + ":" + STR(loDt.Minute)
RELEASE loDt

RELEASE loRest
RELEASE loJson
RELEASE loFileStream
RELEASE loJsonResp
RELEASE loCkdt