Question

我正在研究如何自动登录到https站点，该站点具有我稍后需要调用的表单。我遇到了下面的例子，它解释了如何登录gmail;但是，我所拥有的问题是无论使用何种凭证，我总是得到200欧元。有人可以帮我解决这个问题吗？

public class HttpUrlConnectionExample {

  private List<String> cookies;
  private HttpsURLConnection conn;

  private final String USER_AGENT = "Mozilla/5.0";

  public static void main(String[] args) throws Exception {

    String url = "https://accounts.google.com/ServiceLoginAuth";
    String gmail = "https://mail.google.com/mail/#inbox";

    HttpUrlConnectionExample http = new HttpUrlConnectionExample();

    // make sure cookies is turn on
    CookieHandler.setDefault(new CookieManager());

    // 1. Send a "GET" request, so that you can extract the form's data.
    String page = http.GetPageContent(url);
    String postParams = http.getFormParams(page, "username@gmail.com", "password");



    // 2. Construct above post's content and then send a POST request for
    // authentication
    http.sendPost(url, postParams);



    // 2. Construct above post's content and then send a POST request for


    // 3. success then go to gmail.
    String result = http.GetPageContent(gmail);
    System.out.println(result);
  }

  private void sendPost(String url, String postParams) throws Exception {

    URL obj = new URL(url);
    conn = (HttpsURLConnection) obj.openConnection();

    // Acts like a browser
    conn.setUseCaches(false);
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Host", "accounts.google.com");
    conn.setRequestProperty("User-Agent", USER_AGENT);
    conn.setRequestProperty("Accept",
        "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
    conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
    for (String cookie : this.cookies) {
        conn.addRequestProperty("Cookie", cookie.split(";", 1)[0]);
    }
    conn.setRequestProperty("Connection", "keep-alive");
    conn.setRequestProperty("Referer", "https://accounts.google.com/ServiceLogin");
    conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    conn.setRequestProperty("Content-Length", Integer.toString(postParams.length()));

    conn.setDoOutput(true);
    conn.setDoInput(true);

    // Send post request
    DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
    wr.writeBytes(postParams);
    wr.flush();
    wr.close();

    int responseCode = conn.getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + postParams);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in =
             new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();
    // System.out.println(response.toString());

  }

  private String GetPageContent(String url) throws Exception {

    URL obj = new URL(url);
    conn = (HttpsURLConnection) obj.openConnection();

    // default is GET
    conn.setRequestMethod("GET");

    conn.setUseCaches(false);

    // act like a browser
    conn.setRequestProperty("User-Agent", USER_AGENT);
    conn.setRequestProperty("Accept",
        "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
    conn.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
    if (cookies != null) {
        for (String cookie : this.cookies) {
            conn.addRequestProperty("Cookie", cookie.split(";", 1)[0]);
        }
    }
    int responseCode = conn.getResponseCode();
    System.out.println("\nSending 'GET' request to URL : " + url);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in =
            new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    // Get the response cookies
    setCookies(conn.getHeaderFields().get("Set-Cookie"));

    return response.toString();

  }

  public String getFormParams(String html, String username, String password)
        throws UnsupportedEncodingException {

    System.out.println("Extracting form's data...");

    Document doc = Jsoup.parse(html);

    // Google form id
    Element loginform = doc.getElementById("gaia_loginform");
    Elements inputElements = loginform.getElementsByTag("input");
    List<String> paramList = new ArrayList<String>();
    for (Element inputElement : inputElements) {
        String key = inputElement.attr("name");
        String value = inputElement.attr("value");

        if (key.equals("Email"))
            value = username;
        else if (key.equals("Passwd"))
            value = password;
        paramList.add(key + "=" + URLEncoder.encode(value, "UTF-8"));
                System.out.println(paramList.toString());
    }

    // build parameters list
    StringBuilder result = new StringBuilder();
    for (String param : paramList) {
        if (result.length() == 0) {
            result.append(param);
        } else {
            result.append("&" + param);
        }
    }
    return result.toString();
  }

  public List<String> getCookies() {
    return cookies;
  }

  public void setCookies(List<String> cookies) {
    this.cookies = cookies;
  }

}

Answer 1

不说它是不可能的，你将在这条道路上取得很多艰苦而乏味的工作。 Gmail登录是一种复杂的模型。它不仅仅是表格参数发送......

希望有一条非常高速的道路：Gmail API。您可以找到方便的Java quickstart以自动执行Gmail登录。以下是摘要：

Prerequesites

Java 1.7或更高版本。
Gradle 2.3或更高版本。
访问互联网和网络浏览器。
启用了Gmail的Google帐户。

第1步：开启Gmail API

准备和设置Gmail API使用的简单分步说明。

第2步：准备项目

使用Gradle准备项目依赖项。您可以手动或使用其他构建器（Maven等）设置依赖项。

第3步：设置样本

您可以复制或下载完整的工作示例代码以登录Gmail。

另见：

在此示例中，我们将使用GitHub类登录FormElement网站。

// # Constants used in this example
final String USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36"; 
final String LOGIN_FORM_URL = "https://github.com/login";
final String USERNAME = "yourUsername";  
final String PASSWORD = "yourPassword";  

// # Go to login page
Connection.Response loginFormResponse = Jsoup.connect(LOGIN_FORM_URL)
                                             .method(Connection.Method.GET)
                                             .userAgent(USER_AGENT)
                                             .execute();  

// # Fill the login form
// ## Find the form first...
FormElement loginForm = (FormElement)loginFormResponse.parse()
                                         .select("div#login > form").first();
checkElement("Login Form", loginForm);

// ## ... then "type" the username ...
Element loginField = loginForm.select("#login_field").first();
checkElement("Login Field", loginField);
loginField.val(USERNAME);

// ## ... and "type" the password
Element passwordField = loginForm.select("#password").first();
checkElement("Password Field", passwordField);
passwordField.val(PASSWORD);        


// # Now send the form for login
Connection.Response loginActionResponse = loginForm.submit()
         .cookies(loginFormResponse.cookies())
         .userAgent(USER_AGENT)  
         .execute();

System.out.println(loginActionResponse.parse().html());

public static void checkElement(String name, Element elem) {
    if (elem == null) {
        throw new RuntimeException("Unable to find " + name);
    }
}

所有表单数据都由FormElement类为我们处理（甚至是表单方法检测）。调用Connection方法时会生成现成的FormElement#submit。我们所要做的就是用附加标题（cookies，用户代理等）完成这个连接并执行它。

如何自动化Gmail登录以在Java 8中使用HttpsURLConnection和Jsoup

1 个答案:

Prerequesites

第1步：开启Gmail API

第2步：准备项目

第3步：设置样本

另见：