AutoIt Requires Chilkat v11.7.0+
Box: Upload a New Version of an Existing File

Run the reusable setup once per HttpCurl object, then select names and execute the operation. The setup is repeated here only to make this published example independently runnable. Resolve the existing file by name to create a new version. This preserves the file identity; uploading a new file with a duplicate name is not the same operation.
See the Box API guide for setup and the complete workflow.
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Local $bSuccess = False

;  Requires Chilkat 11.7.0 or later and a previously unlocked Chilkat bundle.
;  See Global Unlock Sample.
;  Guide: Box API Guide.

$bSuccess = False

;  BEGIN ONE-TIME SETUP
;  This block is repeated so each published example can run on its own.
;  In an application, run the setup example once and pass the SAME curl object
;  to operation code below. Do not recreate it for every operation.
;  See Reusable Box HttpCurl Setup.
$oCurl = ObjCreate("Chilkat.HttpCurl")
$oCurl.SetVar "access_token","BOX_ACCESS_TOKEN"
$oCurl.SetVar "parent_name","/"
;  Box's fixed root ID is an implementation detail; callers supply names.
$oCurl.SetVar "parent_id","0"
$oSetupCommand = ObjCreate("Chilkat.StringBuilder")
Local $iSetupReplacements

;  Register findParent; registration sends no request.
$oSetupCommand.SetString("curl -X GET ""https://api.box.com/2.0/folders/0/items?limit=1000&fields=id,type,name"" -H ""Authorization: Bearer ACCESS_TOKEN""")
$iSetupReplacements = $oSetupCommand.Replace("ACCESS_TOKEN",$oCurl.GetVar("access_token"))
$bSuccess = $oCurl.AddFunction("findParent",$oSetupCommand.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

;  Register findFolder; registration sends no request.
$oSetupCommand.SetString("curl -X GET ""https://api.box.com/2.0/folders/{{parent_id}}/items?limit=1000&fields=id,type,name"" -H ""Authorization: Bearer ACCESS_TOKEN""")
$iSetupReplacements = $oSetupCommand.Replace("ACCESS_TOKEN",$oCurl.GetVar("access_token"))
$bSuccess = $oCurl.AddFunction("findFolder",$oSetupCommand.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

;  Register findFile; registration sends no request.
$oSetupCommand.SetString("curl -X GET ""https://api.box.com/2.0/folders/{{folder_id}}/items?limit=1000&fields=id,type,name"" -H ""Authorization: Bearer ACCESS_TOKEN""")
$iSetupReplacements = $oSetupCommand.Replace("ACCESS_TOKEN",$oCurl.GetVar("access_token"))
$bSuccess = $oCurl.AddFunction("findFile",$oSetupCommand.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

;  Register findDestination; registration sends no request.
$oSetupCommand.SetString("curl -X GET ""https://api.box.com/2.0/folders/0/items?limit=1000&fields=id,type,name"" -H ""Authorization: Bearer ACCESS_TOKEN""")
$iSetupReplacements = $oSetupCommand.Replace("ACCESS_TOKEN",$oCurl.GetVar("access_token"))
$bSuccess = $oCurl.AddFunction("findDestination",$oSetupCommand.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

;  Register getFileDetails; registration sends no request.
$oSetupCommand.SetString("curl -X GET ""https://api.box.com/2.0/files/{{file_id}}?fields=id,sha1,file_version"" -H ""Authorization: Bearer ACCESS_TOKEN""")
$iSetupReplacements = $oSetupCommand.Replace("ACCESS_TOKEN",$oCurl.GetVar("access_token"))
$bSuccess = $oCurl.AddFunction("getFileDetails",$oSetupCommand.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

;  Register getEnterprise; registration sends no request.
$oSetupCommand.SetString("curl -X GET ""https://api.box.com/2.0/users/me?fields=enterprise"" -H ""Authorization: Bearer ACCESS_TOKEN""")
$iSetupReplacements = $oSetupCommand.Replace("ACCESS_TOKEN",$oCurl.GetVar("access_token"))
$bSuccess = $oCurl.AddFunction("getEnterprise",$oSetupCommand.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

;  Register output rules once. Chilkat 11.7.0 evaluates {{name}} variables
;  when extracting each output, using the current value at that time.
$bSuccess = $oCurl.AddOutput2("findParent","entries","name","{{parent_name}}",True,"id","parent_id")
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCurl.AddOutput2("findFolder","entries","name","{{folder_name}}",True,"id","folder_id")
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCurl.AddOutput2("findFile","entries","name","{{file_name}}",True,"id","file_id")
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCurl.AddOutput2("findDestination","entries","name","{{destination_name}}",True,"id","destination_id")
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCurl.AddOutput("getFileDetails","file_version.id","file_version_id")
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCurl.AddOutput("getFileDetails","sha1","file_sha1")
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oCurl.AddOutput("getEnterprise","enterprise.id","enterprise_id")
If ($bSuccess <> True) Then
    ConsoleWrite($oCurl.LastErrorText & @CRLF)
    Exit
EndIf

;  END ONE-TIME SETUP
;  The name lookups below assume each listing fits in one page (1000 items).
;  Parent and destination names select root children; folder_name selects a child
;  of parent_name. "/" selects the root parent. These are not arbitrary paths.

;  BEGIN OPERATION -- keep the configured object when reusing it.
;  Inputs are names. Retain cached IDs when the selected names have not changed.
Local $sParentName = "/"
Local $sFolderName = "documents"
Local $sFileName = "invoice.pdf"
If (($oCurl.GetVar("parent_name") <> $sParentName) Or (($sParentName = "/") And ($oCurl.VarDefined("parent_id") = False))) Then
    $oCurl.SetVar "parent_name",$sParentName
    $oCurl.ClearVar "parent_id"
    $oCurl.ClearVar "folder_id"
    $oCurl.ClearVar "file_id"
    $oCurl.ClearVar "file_version_id"
    $oCurl.ClearVar "file_sha1"
    If ($sParentName = "/") Then
        $oCurl.SetVar "parent_id","0"
    EndIf

EndIf

If ($oCurl.GetVar("folder_name") <> $sFolderName) Then
    $oCurl.SetVar "folder_name",$sFolderName
    $oCurl.ClearVar "folder_id"
    $oCurl.ClearVar "file_id"
    $oCurl.ClearVar "file_version_id"
    $oCurl.ClearVar "file_sha1"
EndIf

If ($oCurl.GetVar("file_name") <> $sFileName) Then
    $oCurl.SetVar "file_name",$sFileName
    $oCurl.ClearVar "file_id"
    $oCurl.ClearVar "file_version_id"
    $oCurl.ClearVar "file_sha1"
EndIf

$oCurl.ClearTargetOutput "*"
$oCurl.ClearVar "updated_file_id"
$oCurl.AddTargetOutput "entries[0].id","updated_file_id"
$oCurl.ClearVar "version_id"
$oCurl.AddTargetOutput "entries[0].file_version.id","version_id"
$oAuthorizedCommand1 = ObjCreate("Chilkat.StringBuilder")
$oAuthorizedCommand1.SetString("curl -X POST ""https://upload.box.com/api/2.0/files/{{file_id}}/content"" -H ""Authorization: Bearer {{access_token}}"" -F ""file=@qa_data/pdf/invoice.pdf;type=application/pdf""")
Local $iHeaderReplacement1 = $oAuthorizedCommand1.Replace("{{access_token}}",$oCurl.GetVar("access_token"))
$bSuccess = $oCurl.DoYourThing($oAuthorizedCommand1.GetAsString())
If (($bSuccess <> True) Or ($oCurl.StatusCode <> 201)) Then
    ConsoleWrite("Box request failed. HTTP status: " & $oCurl.StatusCode & @CRLF)
    ConsoleWrite("Failure reason: " & $oCurl.FailReason & @CRLF)
    ConsoleWrite($oCurl.ResponseBodyStr & @CRLF)
    Exit
EndIf

If ($oCurl.VarDefined("!") <> True) Then
    ConsoleWrite("Expected response fields are missing." & @CRLF)
    Exit
EndIf

ConsoleWrite("File: " & $oCurl.GetVar("updated_file_id") & " Version: " & $oCurl.GetVar("version_id") & @CRLF)
;  Invalidate IDs or metadata made stale by this mutation.
$oCurl.ClearVar "file_id"
$oCurl.ClearVar "file_version_id"
$oCurl.ClearVar "file_sha1"