Send a Staged REST Request with a Streamed Body

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Demonstrates Rest.SendReqStreamBody, which sends a request whose body is read from a Stream, then reads the response in separate steps.

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.

func chilkatTest() {
    var success: Bool = false

    let rest = CkoRest()!
    var bTls: Bool = true
    var bAutoReconnect: Bool = true
    success = rest.connect(hostname: "example.com", port: 443, tls: bTls, autoReconnect: bAutoReconnect)
    if success == false {
        print("\(rest.lastErrorText!)")
        return
    }

    //  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.

    //  The request body is read from a Stream whose source is a local file.
    let bodyStream = CkoStream()!
    bodyStream.sourceFile = "qa_data/upload.json"

    rest.addHeader(name: "Content-Type", value: "application/json")

    //  Send the request, reading the body from the stream.  The 3rd argument is the Stream.
    success = rest.sendReqStreamBody(httpVerb: "POST", uriPath: "/api/upload", stream: bodyStream)
    if success == false {
        print("\(rest.lastErrorText!)")
        return
    }

    //  After sending, read the response status line and header fields.  The return value is the HTTP
    //  status code, or -1 if no response was received.
    var statusCode: Int = rest.readResponseHeader().intValue
    if statusCode < 0 {
        print("\(rest.lastErrorText!)")
        return
    }

    print("Response status code: \(statusCode)")

    //  Read the response body as text.
    var responseBody: String? = rest.readRespBodyString()
    if rest.lastMethodSuccess == false {
        print("\(rest.lastErrorText!)")
        return
    }

    print("\(responseBody!)")

}