Question

我想解析受密码保护的RSS Feed中的数据。如果我尝试解析数据，它会抛出＆＃34;文件未找到异常＆＃34;

这是我的代码：

try {
                DBF = DocumentBuilderFactory.newInstance();
                DB = DBF.newDocumentBuilder();
                url_val = new URL("http://admin:admin@dev.quaddeals.com/university-of-illinois/androids/city.rss");
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
                try {
                    dom = DB.parse(url_val.openConnection().getInputStream());
                } catch (SAXException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                elt = dom.getDocumentElement();
                NodeList items = elt.getElementsByTagName("item");
                for (int i = 0; i < items.getLength(); i++) {
                    Node item = items.item(i);
                    NodeList properties = item.getChildNodes();
                    for (int j = 0; j < properties.getLength(); j++) {
                        Node property = properties.item(j);
                        String name = property.getNodeName();

                        if (name.equalsIgnoreCase("title")) {
                            cityTitle = property.getFirstChild().getNodeValue();                                
                        }
                        if (name.equalsIgnoreCase("id")) {

                            cityId = property.getFirstChild().getNodeValue();
                        }
                    }
                    title.add(cityTitle);
                    id.add(cityId);
                }
                   VALUE1 = new String[title.size()];
                    Iterator<String> itc = title.iterator();
                    while (itc.hasNext()) {
                        l1++;
                        VALUE1[l1] = itc.next().toString();                 
                    }

                    VALUE2 = new String[id.size()];
                    Iterator<String> it1c = id.iterator();
                    while (it1c.hasNext()) {
                        m1++;
                        VALUE2[m1] = it1c.next().toString();
                    }

        } catch (Exception e) {



        }

我的Log Cat显示错误如下：

02-21 23:20:48.893: WARN/System.err(19206): java.io.FileNotFoundException: http://dev.quaddeals.com/university-of-illinois/androids/city.rss

02-21 23:20:48.893: WARN/System.err(19206):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1064)

02-21 23:20:48.893: WARN/System.err(19206):     at com.fsp.quaddeals.DealCities$SelectDataTask_Deals.doInBackground(DealCities.java:341)

02-21 23:20:48.893: WARN/System.err(19206):     at com.fsp.quaddeals.DealCities$SelectDataTask_Deals.doInBackground(DealCities.java:1)

如果我在浏览器中输入this URL，它将要求进行身份验证，之后它将重定向到我的解析数据所在的原始RSS FEED。

我想解析此页面中的数据。如何访问此受密码保护的页面并解析数据？ Android是否支持SSL连接。

Answer 1

这里有几个选项。您可以手动设置它，如下所示：

URL url = new URL("http://admin:admin@dev.quaddeals.com/university-of-illinois/androids/city.rss");
URLConnection urlConnection = url.openConnection();

if (url.getUserInfo() != null) {
    String basicAuth = "Basic " + new String(new Base64().encode(url.getUserInfo().getBytes()));
    urlConnection.setRequestProperty("Authorization", basicAuth);
}

dom = DB.parse(urlConnection.getInputStream());

您可以使用java.net.Authenticator，但它可以全局（在所有网址上）：

// see https://developer.android.com/reference/java/net/Authenticator.html
// and https://developer.android.com/reference/java/net/PasswordAuthentication.html
Authenticator.setDefault(new Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication("admin", "admin".toCharArray());
    }
});

您可以使用Volley（example）或我个人偏好okhttp（example）等库。

如何在Android中访问经过身份验证的网址？

1 个答案: