yql : 服务器返回 HTTP 响应代码： 400 for URL

Question

如果我从前端执行此操作，则以下工作正常

  var symbol = symbolsarray[i].trim();
  var query = "select * from yahoo.finance.quotes where symbol = " + "'" + symbol + "'";
  var yql = "http://query.yahooapis.com/v1/public/yql?q=" + escape(query) + "&format=json&diagnostics=false&env=store://datatables.org/alltableswithkeys&callback=?";

我试过用这种方式从java做同样的事情

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

public class JSONfunctions {
    public static void main(String args[]) {
        getQuote();
    }

    private static Double getQuote() {
        try {
            // URL url = new
            // URL("http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20%3D%20%27%255EHSI%27&format=json&diagnostics=false&env=store://datatables.org/alltableswithkeys&callback=jQuery1830024542473256587982_1445857302444");

            String symbol = "%5EAORD";
            String query = "select * from yahoo.finance.quotes where symbol = "
                    + "'" + symbol + "'";

            String yql = "http://query.yahooapis.com/v1/public/yql?q="
                    + query
                    + "&format=json&diagnostics=false&env=store://datatables.org/alltableswithkeys&callback=?";

            URL url = new URL(yql);

            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    url.openStream()));
            String line = reader.readLine();
            System.out.println(line);
            reader.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        return null;
    }
}

但我得到的回应是

Server returned HTTP response code: 400 for URL: http://query.yahooapis.com/v1/public/yql?q=select * from yahoo.finance.quotes where symbol = '%5EAORD'&format=json&diagnostics=false&env=store://datatables.org/alltableswithkeys&callback=?

Answer 1

尝试对您的查询进行编码以在 url 中使用。

String yql = "http://query.yahooapis.com/v1/public/yql?q="
                + java.net.URLEncoder.encode(query, "UTF-8")
                + "&format=json&diagnostics=false&env=store://datatables.org/alltableswithkeys&callback=?";

您的查询包含空格，所以我怀疑这可能是一个解决方案。