PowerBuilder

Set a Multipart Part Body from a Stream

Demonstrates Rest.SetMultipartBodyStream, which uses a Stream as the body source for the selected multipart part.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background. Streaming a part body is appropriate for large parts because the data is read incrementally from the source rather than being buffered entirely in memory. The part is otherwise assembled the same way — select the part, set its headers, then set its body.

Chilkat PowerBuilder Downloads

Download Chilkat for PowerBuilder

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Rest
integer li_BTls
integer li_BAutoReconnect
oleobject loo_PartStream
string ls_ResponseText

li_Success = 0

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat.Rest")
if li_rc < 0 then
    destroy loo_Rest
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_BTls = 1
li_BAutoReconnect = 1
li_Success = loo_Rest.Connect("example.com",443,li_BTls,li_BAutoReconnect)
if li_Success = 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    return
end if

//  The file paths are relative to the application's current working directory.  Absolute paths
//  may also be used.  Supply the paths appropriate to your own environment.

//  Select the multipart part to build, and set its header fields.
loo_Rest.PartSelector = "1"
loo_Rest.AddHeader("Content-Disposition","form-data; name=~"field1~"")
loo_Rest.AddHeader("Content-Type","application/octet-stream")

//  Use a Stream as the body source for the selected part.  The stream's source is a local file,
//  which is appropriate for large parts.
loo_PartStream = create oleobject
li_rc = loo_PartStream.ConnectToNewObject("Chilkat.Stream")

loo_PartStream.SourceFile = "qa_data/attachment.bin"
li_Success = loo_Rest.SetMultipartBodyStream(loo_PartStream)
if li_Success = 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_PartStream
    return
end if

ls_ResponseText = loo_Rest.FullRequestMultipart("POST","/api/upload")
if loo_Rest.LastMethodSuccess = 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_PartStream
    return
end if

Write-Debug ls_ResponseText


destroy loo_Rest
destroy loo_PartStream