(PureBasic) 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 PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkHttpRequest.pb"

Procedure ChilkatExample()

    req.i = CkHttpRequest::ckCreate()
    If req.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttpRequest::setCkHttpVerb(req, "POST")
    CkHttpRequest::setCkPath(req, "/something")
    CkHttpRequest::setCkContentType(req, "multipart/form-data")

    CkHttpRequest::ckAddStringForUpload(req,"fileA","fileA.txt","This is the contents of file A","utf-8")
    CkHttpRequest::ckAddStringForUpload(req,"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:
    Debug CkHttpRequest::ckGenerateRequestText(req)

    ; If the Boundary property is set to a specific string, then the
    ; request will use it:
    CkHttpRequest::setCkBoundary(req, "ABC123HELLOWORLD")
    Debug CkHttpRequest::ckGenerateRequestText(req)


    CkHttpRequest::ckDispose(req)


    ProcedureReturn
EndProcedure