Swift
OneNote - Get Page HTML Content

Download the HTML content of a OneNote page. Also iterates over the images and attachments on the OneNote page and downloads the content for each.
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Swift

func chilkatTest() {
    var success: Bool = false

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let http = CkoHttp()!

    // Implements the following CURL command:

    // curl -X GET https://graph.microsoft.com/v1.0/me/onenote/pages/{id}/content?includeIDs=true \
    //   -H 'authorization: Bearer ACCESS_TOKEN'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Adds the "Authorization: Bearer ACCESS_TOKEN" header.
    http.authToken = "ACCESS_TOKEN"

    http.setUrlVar(name: "page_id", value: "0-d2298668edd74dccac7f821fa378bf64!41-3A33FCEB9B74CC15!20350")

    let sbResponseBody = CkoStringBuilder()!
    success = http.quickGetSb(url: "https://graph.microsoft.com/v1.0/me/onenote/pages/{$page_id}/content?includeIDs=true", sbContent: sbResponseBody)
    if success == false {
        print("\(http.lastErrorText!)")
        return
    }

    print("HTML content:")
    print("\(sbResponseBody.getAsString()!)")

    var respStatusCode: Int = http.lastStatus.intValue
    print("Response Status Code = \(respStatusCode)")
    if respStatusCode >= 400 {
        print("Response Header:")
        print("\(http.lastHeader!)")
        print("Failed.")
        return
    }

    // Let's get the images and attached files.
    // Here's sample HTML content with 2 images and one PDF attachment:

    // <html lang="en-US">
    // 	<head>
    // 		<title>A page with rendered images and an attached file</title>
    // 		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    // 		<meta name="created" content="2020-10-23T12:00:00.0000000" />
    // 	</head>
    // 	<body data-absolute-enabled="true" style="font-family:Calibri;font-size:11pt">
    // 		<div id="div:{b130eb6c-638a-4f97-8f7e-b6d9e2e88bf9}{32}" data-id="_default" style="position:absolute;left:48px;top:120px;width:624px">
    // 			<p id="p:{b130eb6c-638a-4f97-8f7e-b6d9e2e88bf9}{39}" style="margin-top:5.5pt;margin-bottom:5.5pt">Here&#39;s an image from an online source:</p>
    // 			<img id="img:{ee18fe8d-b219-4baf-9b4d-4fc680579f0d}{1}" alt="an image on the page" width="500" height="500" src="https://graph.microsoft.com/v1.0/users('admin@chilkat.io')/onenote/resources/0-e71b45b763484921b4200e32c2439a47!1-3A33FCEB9B74CC15!20350/$value" data-src-type="image/jpeg" data-fullres-src="https://graph.microsoft.com/v1.0/users('admin@chilkat.io')/onenote/resources/0-e71b45b763484921b4200e32c2439a47!1-3A33FCEB9B74CC15!20350/$value" data-fullres-src-type="image/jpeg" />
    // 			<p id="p:{b130eb6c-638a-4f97-8f7e-b6d9e2e88bf9}{43}" style="margin-top:5.5pt;margin-bottom:5.5pt">Here&#39;s an image uploaded as binary data:</p>
    // 			<img id="img:{ee18fe8d-b219-4baf-9b4d-4fc680579f0d}{3}" alt="an image on the page" width="300" height="225" src="https://graph.microsoft.com/v1.0/users('admin@chilkat.io')/onenote/resources/0-a60516b962b842f2ae9bec75c16b31de!1-3A33FCEB9B74CC15!20350/$value" data-src-type="image/jpeg" data-fullres-src="https://graph.microsoft.com/v1.0/users('admin@chilkat.io')/onenote/resources/0-a60516b962b842f2ae9bec75c16b31de!1-3A33FCEB9B74CC15!20350/$value" data-fullres-src-type="image/jpeg" />
    // 			<p id="p:{b130eb6c-638a-4f97-8f7e-b6d9e2e88bf9}{47}" style="margin-top:5.5pt;margin-bottom:5.5pt">Here&#39;s a file attachment:</p>
    // 			<object data-attachment="FileName.pdf" type="application/pdf" data="https://graph.microsoft.com/v1.0/users('admin@chilkat.io')/onenote/resources/0-9e685efb33a24a6a8de1b9c707d28385!1-3A33FCEB9B74CC15!20350/$value" />
    // 		</div>
    // 	</body>
    // </html>

    let xml = CkoXml()!
    xml.loadSb(sb: sbResponseBody, autoTrim: true)

    // Iterate over each element in the XML.  Each time we find an "img" or "object", download the data.
    // (The sbState is an object used to keep track of the current state of the traversal.)
    let sbState = CkoStringBuilder()!
    var url: String?
    let bd = CkoBinData()!
    while xml.next(inTraversal2: sbState) != false {

        if xml.tagEquals(tag: "img") == true {
            print("img id: \(xml.getAttrValue(name: "id")!)")
            url = xml.getAttrValue(name: "src")
            bd.clear()
            success = http.quickGetBd(url: url, binData: bd)
            if success == false {
                print("\(http.lastErrorText!)")
                return
            }

            print("Downloaded from \(url!)")
            print("----")
            // If desired, bd.WriteFile to save the contents of bd to a file..
        }

        if xml.tagEquals(tag: "object") == true {
            print("data-attachment: \(xml.getAttrValue(name: "data-attachment")!)")
            print("type: \(xml.getAttrValue(name: "type")!)")
            url = xml.getAttrValue(name: "data")
            bd.clear()
            success = http.quickGetBd(url: url, binData: bd)
            if success == false {
                print("\(http.lastErrorText!)")
                return
            }

            print("Downloaded from \(url!)")
            print("----")
            // If desired, bd.WriteFile to save the contents of bd to a file..
        }

    }

    print("Success.")

}