Create session to attach large file

Create an upload session that allows you to attach a file with the file size between 3 MB and 150 MB.

C++ example

#include <iostream>
#include <string>

#include "independentsoft/graph/graph_client.hpp"
#include "independentsoft/graph/graph_exception.hpp"
#include "independentsoft/graph/attachment_item.hpp"
#include "independentsoft/graph/upload_session.hpp"
#include "independentsoft/graph/mails/message.hpp"
#include "independentsoft/graph/mails/message_id.hpp"
#include "independentsoft/graph/users/user_id.hpp"

using namespace independentsoft::graph;
using namespace independentsoft::graph::mails;
using namespace independentsoft::graph::users;

int main()
{
    try
    {
        GraphClient client;

        client.client_id = "63333333-209e-454e-b7bd-55a4d201270f";
        client.tenant = "independentsoft.onmicrosoft.com";
        client.client_secret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

        Message message;
        message.subject = "Large attachment";

        Message createdMessage = sync_wait(client.create_message(message, UserId("info@independentsoft.onmicrosoft.com")));

        AttachmentItem attachmentItem("e:\\Test.pdf");

        UploadSession uploadSession = sync_wait(client.create_upload_session(attachmentItem, MessageId(createdMessage.id), UserId("info@independentsoft.onmicrosoft.com")));

        std::string url = sync_wait(client.create_attachment(uploadSession, std::string("e:\\Test.pdf")));

        std::cout << "Url: " << url << std::endl;
    }
    catch (const GraphException& ex)
    {
        std::cout << "Error: " << ex.code << std::endl;
        std::cout << "Message: " << ex.message << std::endl;
    }

    return 0;
}

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