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我正在尝试以编程方式登录https://thingspeak.com/login网站。我已经编写了 Blow android 程序，但它不能帮助我登录。请告诉我我做错了什么。

//inside thread function

List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("User ID", "****"));
nameValuePairs.add(new BasicNameValuePair("Password", "*****"));
nameValuePairs.add(new BasicNameValuePair("Sign In", "Sign In"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);

//after thread function getting called, below line is from oncreate method

WebView webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setAppCacheEnabled(false);
webview.getSettings().setJavaScriptEnabled(true);
WebSettings webSettings = webview.getSettings();
webSettings.setJavaScriptEnabled(true);
webview.loadUrl("https://thingspeak.com/channels/42085");

我可以加载网站，但它告诉这个频道不公开，因为它没有登录。请帮助我。提前致谢。

用户名：niru

密码：helloworld@123

4

1 回答 1

2

您正在搜索的方法称为 HTTP 基本身份验证。如果您的目标服务器使用 SSL，这会变得非常困难，因为您需要证书。

这种身份验证按以下步骤工作：

  • 登录表单 URL。
  • 登录表单数据。
  • 用于身份验证的 URL。

  • Http 请求/响应标头。

    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/";

    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);

    // 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/ServiceLoginAuth");
    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"));
    }

    // 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;
}
}

重要资源：
如何自动登录网站 – Java 示例

于 2015-06-19T12:53:32.820 回答