1

在发布这个问题之前，我搜索了很多以确定如何提问。

我正在尝试使用 Java 连接到 OpenDaylight 控制器，我正在尝试通过使用控制器提供的其余服务进行连接。我的问题是，当我发送 http 请求时，除了登录之外我无法获得任何进一步的信息，我不确定它是否可能。我没有从控制器获取拓扑或其他答案，而是获取登录表单的 html。

另外，我不确定我是否应该这样连接。

非常感谢任何帮助/指导。:)

我创建连接的代码是：

public String getContent(String urls) throws  IOException {

    String cont="";

    CloseableHttpClient httpclient = HttpClients.createDefault();

    HttpPost httpPost = new HttpPost(urls);

    List <NameValuePair> nvps = new ArrayList <NameValuePair>();

    nvps.add(new BasicNameValuePair("j_username", "username"));

    nvps.add(new BasicNameValuePair("j_password", "password"));

    httpPost.setEntity(new UrlEncodedFormEntity(nvps));

    CloseableHttpResponse response2 = httpclient.execute(httpPost);

    try {

        System.out.println(response2.getStatusLine());

        HttpEntity entity2 = response2.getEntity();

        BufferedReader reader =new BufferedReader(new InputStreamReader(entity2.getContent()));

        String line="";

        while((line=reader.readLine())!=null){
            cont+=line+"\n";
        }


    } finally {
        response2.close();

    }           

    return cont;
}

当我运行代码时，这是打印的：

HTTP/1.1 200 正常

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>OpenDaylight - Login</title>
<script src="/js/bootstrap.min.js"></script>    
<script type="text/javascript">
    less = {
        env: "production"
    };
</script>
<script src="/js/less-1.3.3.min.js"></script>
</head>
<body>
<form action="j_security_check;jsessionid=LONGID" id="form" method="post">
<div class="container">
 <div class="content">
   <div class="login-form">
     <div id="logo"></div>
       <fieldset>
         <div class="control-group">
           <input type="text" name="j_username" placeholder="Username">
         </div>
         <div class="control-group">
           <input type="password" name="j_password" placeholder="Password">
         </div>
         <button class="btn btn-primary" type="submit" value="Log In" >
        <div class="icon-login"></div> Log In</button>
       </fieldset>
   </div>
 </div>
 </div> 
 </form>
 </body>
 </html>
4

2 回答 2

2

问题似乎与身份验证有关。用户名和密码必须编码为 Base64。请尝试下面的示例代码，它以 JSON 格式获取流详细信息。您可以尝试以相同的方式获取拓扑详细信息。

您可以从这里下载 commons-codec 库

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.commons.codec.binary.Base64;

public class OpenDayLightUtils {

    public static void getFlowDetails() {

    String user = "admin";
    String password = "admin";
    String baseURL = "http://192.168.100.1:8080/controller/nb/v2/flowprogrammer";
    String containerName = "default";

    try {

        // Create URL = base URL + container
        URL url = new URL(baseURL + "/" + containerName);

        // Create authentication string and encode it to Base64
        String authStr = user + ":" + password;
        String encodedAuthStr = Base64.encodeBase64String(authStr.getBytes());

        // Create Http connection
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        // Set connection properties
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Authorization", "Basic " + encodedAuthStr);
        connection.setRequestProperty("Accept", "application/json");

        // Get the response from connection's inputStream
        InputStream content = (InputStream) connection.getInputStream();

        BufferedReader in = new BufferedReader(new InputStreamReader(content));
        String line = "";
        while ((line = in.readLine()) != null) {
        System.out.println(line);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    }
}
于 2014-05-08T06:03:58.667 回答
0

此链接为您提供了对 ODL 的所有 RESTConf Api 的完整参考：OpenDaylight_Controller:MD-SAL:Model_Reference

另一个不错的起点是：OpenDaylight OpenFlow 插件：用户指南

例如，如果你想找到拓扑，你必须发送一个 GET 请求到：http://:8080/restconf/operational/network-topology:network-topology/topology/flow:1/

因此，URN 名称空间告诉您要与 ODL 控制器中的哪个模块/捆绑包进行通信。另一个示例是 http://:8080/restconf/operational/opendaylight-inventory:nodes/node/openflow:1，其中将为您提供有关 openflow 节点“openflow:1”的信息。

如果您想推送某些内容，例如 openflow 规则，只需将 XML 主体与标头 Content-Type' : 'application/xml' 和 'Accept':'application/xml 一起附加到 PUT。这是我在 python 中为我的应用程序创建的“lib”。你可能会找到一些灵感。

import sys
import json
import httplib2

#Base URLs for Config and operational
baseUrl = 'http://192.168.231.246:8080'
confUrl = baseUrl + '/restconf/config/'
operUrl = baseUrl + '/restconf/operational/'

#"Old" REST APIs that still are used
sdSalUrl = baseUrl + '/controller/nb/v2/'

#Specific REST URLs
findNodes = operUrl + '/opendaylight-inventory:nodes/'
findTopo = operUrl + '/network-topology:network-topology/'
findNodeConnector = operUrl + '/opendaylight-inventory:nodes/node/node-connector/'
findTopology = operUrl + '/network-topology:network-topology/topology/flow:1/'
findFlow = confUrl +'/opendaylight-inventory:nodes/node/openflow:1/table/0/'

h = httplib2.Http(".cache")
h.add_credentials('admin', 'admin')

#Functions for  
def get(url):
    resp, xml = h.request(
        url,
        method = "GET",
        headers = {'Content-Type' : 'application/xml'}
        )
    return xml
def put(url, body):
    resp, content = h.request(
        url, 
        method = "PUT",
        body = body,
        headers = {'Content-Type' : 'application/xml', 'Accept':'application/xml'}
        )
    return resp, content
def delete(url):
    resp, content = h.request(
        url,
        method = "DELETE"
        )
    return resp

def get_active_hosts():
    resp, content = h.request(sdSalUrl + 'hosttracker/default/hosts/active/', "GET")
    hostConfig = json.loads(content)
    hosts = hostConfig['hostConfig']
    return hosts

哦，顺便说一句。ODL 的一位 OVSDB 开发人员早些时候在这里回答了类似的问题：networkstatic 的回答

于 2014-04-23T14:33:25.873 回答