Question

我正在尝试对以下URL进行GET HTTP请求：https://xml.betfred.com/horse-racing-us.xml

它使用Apache或OKHTTP从我的Java代码中阻止，但每次在Postman中都可以运行，而无需任何其他标头等。

我从代码中得到的响应是：

Response{protocol=http/1.1, code=405, message=Not Allowed, url=https://xml.betfred.com/horse-racing-us.xml}

为什么它在Postman中工作，但在其他地方却没有？

    String URL = "https://xml.betfred.com/horse-racing-us.xml";

    HashMap<String, String> headers = new HashMap<String, String>();

    headers.put("Cache-Control", "no-cache");
    headers.put("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36");
    headers.put("Connection", "keep-alive");
    headers.put("accept", "application/json");

    JSONObject object = null;
    try {
        object = JSONHelper.readJsonFromUrl(URL, headers);
    } catch (JSONException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();


public static JSONObject readJsonFromUrl(String urlString, HashMap<String, String> headers) throws IOException, JSONException {
    HttpURLConnection urlConnection = null;

    URL url = new URL(urlString);

    urlConnection = (HttpURLConnection) url.openConnection();

    Iterator<Entry<String, String>> it = headers.entrySet().iterator();
    while (it.hasNext()) {
        Map.Entry<String, String> pair = (Map.Entry<String, String>)it.next();
        urlConnection.setRequestProperty(pair.getKey(), pair.getValue());
    }

    urlConnection.setReadTimeout(10000 /* milliseconds */ );
    urlConnection.setConnectTimeout(15000 /* milliseconds */ );
    urlConnection.setDoOutput(true);

    urlConnection.connect();

    BufferedReader br = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
    StringBuilder sb = new StringBuilder();

    String line;
    while ((line = br.readLine()) != null) {
        sb.append(line + "\n");
    }
    br.close();

    String jsonString = sb.toString();

    urlConnection.disconnect();

    return new JSONObject(jsonString);
}

Answer 1

此消息表示不允许使用HTTP 1.1版的GET方法。

似乎版本不匹配。在浏览器中打开该网站时，它支持HTTP版本2。您可以尝试用OkHttp替换Java的内置HttpUrlConnection，因为OkHttp支持HTTP版本2。您必须升级JVM。在我运行此代码段的JVM（内部版本1.8.0_241-b07）中，选择了HTTP版本2。

GET请求在邮递员中正常工作-405不允许来自Java代码

1 个答案: