Question

我需要获取HTTPS URL的输入流，例如。 https://baseurl.com/mypdfgenerated.php?param=somevalue。为了访问此URL，我需要通过提供BODY参数来浏览登录页面（例如https://baseurl.com/login.php）：

user_name, web_pwd and submit_login

我假设成功访问第一个URL的唯一方法是通过POST到/login.php，然后存储cookie，然后在下一个GET请求中重用cookie-session-ID;如果这是正确的方法，那么有人可以与正确/最近的库共享解决方案吗？

Answer 1

不确定哪种方法是最好的方法，但是帮助我实现这一目标的是CloseableHttpClient类，它与BasicCookieStore一起为登录后的请求保留了cookie，实现如下：

BasicCookieStore cookieStore = new BasicCookieStore(); 
CloseableHttpClient httpclient = HttpClients.custom().setDefaultCookieStore(cookieStore).build(); 
HttpUriRequest login = RequestBuilder.post()
                    .setUri(new URI(url_login))
                    .addParameter("login", "loginuname")
                    .addParameter("password", "pwd")
                    .addParameter("submit", "sub_mit");
CloseableHttpResponse response = httpclient.execute(login);
List<Cookie> cookies = cookieStore.getCookies();
response.close();

HttpGet httpget2 = new HttpGet(url_to_get_after_login);
CloseableHttpResponse response2 = httpclient.execute(httpget2);
response2.close();

Answer 2

Java Samples

的示例代码段

try { 
    System.setProperty("java.protocol.handler.pkgs", "com.sun.net.ssl.internal.www.protocol");
    java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider()); 
    URL url = new URL("https://www.yourwebsite.com/"); // Some URL
    HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
    connection.setDoInput(true); 
    connection.setDoOutput(true);
    connection.setRequestMethod("POST"); 
    connection.setFollowRedirects(true); 
    String query = "UserID=" + URLEncoder.encode("username"); 
    query += "&"; 
    query += "password=" + URLEncoder.encode("password"); 
    query += "&"; 
    // open up the output stream of the connection 
    DataOutputStream output = new DataOutputStream( connection.getOutputStream() ); 
    // write out the data 
    output.writeBytes( query ); 
}catch(Exception err){
    err.printStackTrace();
}

查看Usage of cookies

Answer 3

您应该使用为您处理Cookie的库，例如Apache HTTPClient。

Java中的后续HTTPS POST请求，保留了cookie

3 个答案: