(PowerBuilder) HTTP Request Boundary Property

Explains and demonstrates the HTTP request Boundary property. For multipart HTTP requests, Chilkat auto-generates a boundary string when the Boundary property is left unset (or empty). For example:

POST /something HTTP/1.1
Content-Type: multipart/form-data; boundary=------------090207000006060206010508
Host: domain
Content-Length: 378

--------------090207000006060206010508
Content-Disposition: form-data; name="fileA"; filename="fileA.txt"
Content-Type: text/plain

This is the contents of file A
--------------090207000006060206010508
Content-Disposition: form-data; name="fileB"; filename="fileB.txt"
Content-Type: text/plain

This is the contents of file B
--------------090207000006060206010508--

POST /something HTTP/1.1
Content-Type: multipart/form-data; boundary=ABC123HELLOWORLD
Host: domain
Content-Length: 318

--ABC123HELLOWORLD
Content-Disposition: form-data; name="fileA"; filename="fileA.txt"
Content-Type: text/plain

This is the contents of file A
--ABC123HELLOWORLD
Content-Disposition: form-data; name="fileB"; filename="fileB.txt"
Content-Type: text/plain

This is the contents of file B
--ABC123HELLOWORLD--

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

integer li_rc
oleobject loo_Req

loo_Req = create oleobject
// Use "Chilkat_9_5_0.HttpRequest" for versions of Chilkat < 10.0.0
li_rc = loo_Req.ConnectToNewObject("Chilkat.HttpRequest")
if li_rc < 0 then
    destroy loo_Req
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Req.HttpVerb = "POST"
loo_Req.Path = "/something"
loo_Req.ContentType = "multipart/form-data"

loo_Req.AddStringForUpload("fileA","fileA.txt","This is the contents of file A","utf-8")
loo_Req.AddStringForUpload("fileB","fileB.txt","This is the contents of file B","utf-8")

// When the Boundary property is empty (has not yet been set)
// Chilkat auto-generates a random boundary for the request.
// This should almost always be sufficient.
// For example, one can see the generated boundary here:
Write-Debug loo_Req.GenerateRequestText()

// If the Boundary property is set to a specific string, then the
// request will use it:
loo_Req.Boundary = "ABC123HELLOWORLD"
Write-Debug loo_Req.GenerateRequestText()


destroy loo_Req