(Swift 2) 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--

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func chilkatTest() {
    let req = CkoHttpRequest()

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

    req.AddStringForUpload("fileA", filename: "fileA.txt", strData: "This is the contents of file A", charset: "utf-8")
    req.AddStringForUpload("fileB", filename: "fileB.txt", strData: "This is the contents of file B", charset: "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:
    print("\(req.GenerateRequestText())")

    // If the Boundary property is set to a specific string, then the
    // request will use it:
    req.Boundary = "ABC123HELLOWORLD"
    print("\(req.GenerateRequestText())")

}