Question

我需要使用Volley库获取rss feed但是Volley一直忽略我的format=feed&type=rss Params。我尝试了所有的东西，但我无法让它发挥作用这是我的网址：http://almesryoon.com/%D8%AF%D9%81%D8%AA%D8%B1-%D8%A3%D8%AD%D9%88%D8%A7%D9%84-%D8%A7%D9%84%D9%88%D8%B7%D9%86?format=feed&type=rss
注意：此网址适用于Google PostMan
我的SimpleXmlRequest班级：

public class SimpleXmlRequest<T> extends Request<T> {

    private static final Serializer serializer = new Persister();
    private final Class<T> clazz;
    private final Map<String, String> headers;
    private final Listener<T> listener;


    /**
     * Make HTTP request and return a parsed object from Response
     * Invokes the other constructor.
     *
     * @see SimpleXmlRequest#SimpleXmlRequest(int, String, Class, Map, Listener, ErrorListener)
     */
    public SimpleXmlRequest(int method, String url, Class<T> clazz,
                            Listener<T> listener, ErrorListener errorListener) {
        this(method, url, clazz, null, listener, errorListener);
    }


    /**
     * Make HTTP request and return a parsed object from XML Response
     *
     * @param url URL of the request to make
     * @param clazz Relevant class object
     * @param headers Map of request headers
     * @param listener
     * @param errorListener
     *
     */
    public SimpleXmlRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
                            Listener<T> listener, ErrorListener errorListener) {
        super(method, url, errorListener);
        this.clazz = clazz;
        this.headers = headers;
        this.listener = listener;
    }


    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        return headers != null ? headers : super.getHeaders();
    }


    @Override
    protected void deliverResponse(T response) {
        listener.onResponse(response);
    }

    @Override
    public String getBodyContentType() {
        return "application/xml";
    }

    @Override
    protected Response<T> parseNetworkResponse(NetworkResponse response)
    {
        try {

            String data = new String(response.data, HttpHeaderParser.parseCharset(response.headers));// The problem here this data is not XML

            return Response.success(serializer.read(clazz, data),
                    HttpHeaderParser.parseCacheHeaders(response));
        }
        catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        }
        catch (Exception e) {
            return Response.error(new VolleyError(e.getMessage()));
        }
    }
}

此外，我尝试使用METHOD.POST方法使用getParams() 目标rss：

<?xml version="1.0" encoding="utf-8"?>
<!-- generator="Joomla! - Open Source Content Management" -->
<rss version="2.0" 
    xmlns:atom="http://www.w3.org/2005/Atom">
    <channel>
        <title>Title</title>
        <description>Description</description>
        <link>http://google.com</link>
        <lastBuildDate>Thu, 31 Mar 2016 01:27:12 +0200</lastBuildDate>
        <generator>Joomla! - Open Source Content Management</generator>
        <atom:link rel="self" type="application/rss+xml" href="http://example.com/example?format=feed&amp;type=rss"/>
        <language>ar-aa</language>
        <item>
            <title>Item1</title>
            <link>http://example.com/example1</link>
            <guid isPermaLink="true">http://example.com/example1</guid>
            <description>Description1</description>
            <author>admin</author>
            <category>Category1</category>
            <pubDate>Wed, 30 Mar 2016 18:49:37 +0200</pubDate>
        </item>
        <item>
            <title>Item2</title>
            <link>http://example.com/example2</link>
            <guid isPermaLink="true">http://example.com/example2</guid>
            <description>Description2</description>
            <author>admin</author>
            <category>Category1</category>
            <pubDate>Wed, 30 Mar 2016 18:49:37 +0200</pubDate>
        </item>
    </channel>
</rss>

我正在使用此代码并且它运行良好，但HttpParams，BasicHttpParams，HttpConnectionParams，DefaultHttpClient，HttpGet，HttpResponse和HttpEntity现已弃用。
我的工作代码：

StringBuilder chaine = new StringBuilder("");

        try {

            HttpParams httpParameters = new BasicHttpParams();
            // Set the timeout in milliseconds until a connection is established.
            // The default value is zero, that means the timeout is not used.
            int timeoutConnection = AppConstants.CONNECTION_TIMEOUT_SEC * 1000;
            HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
            // Set the default socket timeout (SO_TIMEOUT)
            // in milliseconds which is the timeout for waiting for data.
            int timeoutSocket = AppConstants.SOCKET_TIMEOUT_SEC * 1000;
            HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

            // request method is GET
            DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
            HttpGet httpGet = new HttpGet(url);

            HttpResponse httpResponse = httpClient.execute(httpGet);
            HttpEntity httpEntity = httpResponse.getEntity();

            InputStream inputStream = httpEntity.getContent();

            BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream));

            String line;

            while ((line = rd.readLine()) != null) {

                chaine.append(line);

            }

            rd.close();

        } catch (IOException e) {
            // writing exception to log
            e.printStackTrace();
        }

Answer 1

如果您尝试过对网址进行编码并且无法正常工作，则问题出在凌空。不幸的是，我遇到了同样的情况，只有使用截击的POST请求。他们在HTTP实现方面完美无瑕，但在凌空时返回400.我当时的解决方案是坚持使用旧的HTTP实现。

Answer 2

请使用以下网址获取所需的RSS

https://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?format=feed&type=rss&template=mobile

这是日志：

...
D/dalvikvm: GC_FOR_ALLOC freed 27K, 12% free 6432K/7303K, paused 20ms, total 20ms
I/onResponse: <?xml version="1.0" encoding="utf-8"?>
              <!-- generator="Joomla! - Open Source Content Management" -->
              <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
                <channel>
                    <title>دفتر أحوال الوطن - المصريون</title>
                    <description>المصريون صحيفة يومية مستقلة تنشر آخر وأهم أخبار مصر والوطن العربى والعالم</description>
                    <link>https://m.almesryoon.com/دفتر-أحوال-الوطن</link>
                    <lastBuildDate>Thu, 23 Feb 2017 04:36:51 +0200</lastBuildDate>
                    <generator>Joomla! - Open Source Content Management</generator>
                    <atom:link rel="self" type="application/rss+xml" href="https://m.almesryoon.com/دفتر-أحوال-الوطن?format=feed&amp;type=rss&amp;template=mobile"/>
                    <language>ar-aa</language>
                    <item>
                    ...

在使用您的服务器URL测试一些示例代码后，我发现它得到了301响应。从您的第一个网址开始，第二个网址将是（ https ）

https://almesryoon.com/%D8%AF%D9%81%D8%AA%D8%B1-%D8%A3%D8%AD%D9%88%D8%A7%D9%84-%D8%A7%D9%84%D9%88%D8%B7%D9%86?format=feed&type=rss

第三个网址将是：

http://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?template=mobile

最后的网址将是（ https ）：

https://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?template=mobile

使用此最终网址和下面的示例代码，您将获得 200 响应代码。我想你可以用我上面提到的最终网址尝试你的代码。

RequestQueue queue = Volley.newRequestQueue(this);
String url = "https://m.almesryoon.com/%d8%af%d9%81%d8%aa%d8%b1-%d8%a3%d8%ad%d9%88%d8%a7%d9%84-%d8%a7%d9%84%d9%88%d8%b7%d9%86?template=mobile";
StringRequest request = new StringRequest(url, new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        Log.i("onResponse", response);
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        Log.e("onErrorResponse", error.toString());
    }
});

queue.add(request);

关于在Volley中处理301响应，我没有尝试过，但是，您可以阅读以下问题以获取更多信息

Android volley to handle redirect

排球图库忽略格式= feed＆amp; type = rss Params

2 个答案: