java httpClient Digest Auth 认证

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java httpClient Digest Auth 认证
因为项目需要,请求海康摄像头,进行抓图以及云台控制等功能, 海康有http协议,但是需要进行请求头认证,因为海康给的资料已经过时,所以找了很久

1.先上postMan测试通过

2.httpClient代码 - 发送普通的请求

DefaultHttpClient httpclient = new DefaultHttpClient();
String hostUrl = "http://172.16.1.11";
// 抓图
//        String url = hostUrl + "/ISAPI/Streaming/channels/1/picture";
// 获取焦距
String url = hostUrl + "/ISAPI/PTZCtrl/channels/1/absoluteEx/capabilities";
// 172.16.1.11/ISAPI/PTZCtrl/channels/1/capabilities
URI serverURI = new URI(url);
HttpGet httpGet = new HttpGet(url);
String username = "admin";
String password = "abcd1234";
Credentials creds = new UsernamePasswordCredentials(username,
        password);
httpclient.getCredentialsProvider().setCredentials(
        new AuthScope(serverURI.getHost(), serverURI.getPort()), (Credentials) creds);

HttpResponse response = httpclient.execute(httpGet);

String resultString = EntityUtils.toString(response.getEntity(), "utf-8");

JSONObject object = Xml2Json.xml2Json(resultString);
System.out.println(object);

3.httpClient 下载图片

// 抓图
    public static void download(String url, String filePathName) throws URISyntaxException {
        DefaultHttpClient httpclient = new DefaultHttpClient();
        URI serverURI = new URI(url);
        String username = "admin";
        String password = "abcd1234";
        Credentials creds = new UsernamePasswordCredentials(username,
                password);
        httpclient.getCredentialsProvider().setCredentials(
                new AuthScope(serverURI.getHost(), serverURI.getPort()), (Credentials) creds);
        try {
            HttpGet httpget = new HttpGet(url);

            //伪装成google的爬虫JAVA问题查询
            httpget.setHeader("User-Agent", "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)");
            // Execute HTTP request
            System.out.println("executing request " + httpget.getURI());
            HttpResponse response = httpclient.execute(httpget);

            File storeFile = new File(filePathName);
            FileOutputStream output = new FileOutputStream(storeFile);

            // 得到网络资源的字节数组,并写入文件
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                InputStream instream = entity.getContent();
                try {
                    byte b[] = new byte[1024];
                    int j = 0;
                    while ((j = instream.read(b)) != -1) {
                        output.write(b, 0, j);
                    }
                    output.flush();
                    output.close();
                } catch (IOException ex) {
                    throw ex;
                } catch (RuntimeException ex) {
                    httpget.abort();
                    throw ex;
                } finally {
                    try {
                        instream.close();
                    } catch (Exception ignore) {
                    }
                }
            }

        } catch (Exception e) {
//            logger.error(e.getMessage(), e);
        } finally {
            httpclient.getConnectionManager().shutdown();
        }
    }

4.核心代码,设置请求认证

 DefaultHttpClient httpclient = new DefaultHttpClient();
        URI serverURI = new URI(url);
        String username = "admin";
        String password = "abcd1234";
        Credentials creds = new UsernamePasswordCredentials(username,
                password);
        httpclient.getCredentialsProvider().setCredentials(
                new AuthScope(serverURI.getHost(), serverURI.getPort()), (Credentials) creds);