How to send SMS via HttpClient in Java from Yandex Maps page?

Question

Java

Good afternoon!
Please advise in solving the problem of sending SMS with a link to Yandex.Maps (from the service page) using Java.
As I understand it, every time the page is refreshed, a csfrToken is generated, which is subsequently used in a POST request to send SMS.
The problem is that I get csfrToken, but it seems that with every POST or GET it changes (probably I do not fully understand the ApacheHttpClient mechanism).
I am trying to implement using the following code:

public void WebRequest() throws Exception{
        CookieHandler.setDefault(new CookieManager());
        RequestConfig globalConfig = RequestConfig.custom()
                .setCookieSpec(CookieSpecs.DEFAULT)
                .build();
        CloseableHttpClient httpclient = HttpClients.custom()
                .setDefaultRequestConfig(globalConfig)
                .build();
        RequestConfig localConfig = RequestConfig.copy(globalConfig)
                .setCookieSpec(CookieSpecs.STANDARD_STRICT)
                .build();


        HttpGet request = new HttpGet("https://yandex.ru/maps");
        HttpPost send = new HttpPost("https://yandex.ru/maps/api/sms/sendObject");

        request.setConfig(localConfig);
        send.setConfig(localConfig);

        request.addHeader("Host", "yandex.ru");
        request.addHeader("User-Agent", "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0");
        request.addHeader("Accept", "*/*");
        request.addHeader("Accept-Language", "en-US,en;q=0.8,ru;q=0.6");
        request.addHeader("Accept-Encoding", "gzip, deflate, br");
        request.addHeader("Origin", "https://yandex.ru");
        request.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
        request.addHeader("X-Requested-With", "XMLHttpRequest");
        request.addHeader("Referer", "https://yandex.ru/maps/35/https://yandex.ru/maps/35/myCity/?text=someURL-WithSomeParams");
        request.addHeader("Connection", "keep-alive");

        HttpResponse result = httpclient.execute(request);

        setCookies(result.getFirstHeader("Set-Cookie") == null ? "" :
        result.getFirstHeader("Set-Cookie").toString());

        BufferedReader rd = new BufferedReader(new InputStreamReader(result.getEntity().getContent()));
        String line = "";

        while ((line = rd.readLine()) != null) {
            System.out.println(line);
            int pos=line.indexOf("csrfT");
            tokenStr=line.substring(pos,pos+67).split("\"");
            System.out.println(tokenStr[2]);
            pos=line.indexOf("sessionId");
            sessionId=line.substring(pos,pos+33).split("\"");
            System.out.println(sessionId[2]);
        }

//------------ОТПРАВКА--------------------

        send.addHeader("Host", "yandex.ru");
        send.addHeader("User-Agent", "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0");
        send.addHeader("Accept", "*/*");
        send.addHeader("Accept-Language", "en-US,en;q=0.8,ru;q=0.6");
        send.addHeader("Accept-Encoding", "gzip, deflate, br");
        send.addHeader("Origin", "https://yandex.ru");
        send.addHeader("Cookie", getCookies());
        send.addHeader("Content-Type", "application/json; charset=UTF-8");
        send.addHeader("X-Requested-With", "XMLHttpRequest");
        send.addHeader("Referer", "https://yandex.ru/maps/35/myCity/?text=someURL-WithSomeParams");
        send.addHeader("Connection", "keep-alive");
      
       String json="{\"lang\":\"ru_RU\",\"gid\":35,\"uri\":\"ymapsbm1://org?oid=XXXXXXXXXX\",\"phone\":\"+7XXXXXXXXXX\",\"csrfToken\":\""+tokenStr[2].trim()+"\",\"sessionId\":\""+sessionId[2].trim()+"\",\"host_config\":{\"hostname\":\"yandex.ru\"}}";
        StringEntity params = new StringEntity(json);
        params.setContentType("application/json");
        send.setEntity(params);
      
        result = httpclient.execute(send);
        rd = new BufferedReader(new InputStreamReader(result.getEntity().getContent()));
        line = "";
        while ((line = rd.readLine()) != null) {
            System.out.println(line);
        }
}

public void setCookies(String cookies) {
        this.cookies = cookies;
    }
    public String getCookies() {
        return cookies;
}

As a result, when I try to send, I get an error stating that the current Token does not match the one specified in the POST request.
Please advise what am I doing wrong?
PS I must say right away that I am not going to engage in spam, I need to implement automatic notification of service users when they receive a certain kind of requests (for equipment maintenance). Applications are sent to me by the operator, which are formed by the users themselves.

Answer 1

use the sniffer to study the requests that your browser exchanges with the server when sending several SMS.
I recommend the Fiddler2 sniffer.
Check if csrfToken changes with each new request. Most likely it is changing, because this is its main purpose.