Android URL 连接 java.io.FileNotFoundException

Question

我尝试向 WordlPress 网站发送一个普通的 Http 请求。

这是网址： "http://localhost.com/api/submit_comment/?post_id=12345&name=Max&email=Max.Mustermann@googlemail.com&content=hallo"

如果我用我的网络浏览器打开它，一切正常。如果我通过 Android 应用程序打开它，它会抛出 java.io.FileNotFoundException。

Android 代码：

class SendComment extends AsyncTask<String, Void, String> {

    protected String doInBackground(String... urls) {
        String _output = null;
        try {
            URL url = new URL(urls[0]);
            BufferedReader buffer = new BufferedReader(new InputStreamReader(url.openStream()));
            _output = buffer.readLine();
            buffer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return _output;
    }

    protected void onPostExecute(String result) {

    }
}

但是当我删除电子邮件地址的“@”或“.com”时，它甚至可以在 Android 上运行。似乎可用的电子邮件地址是导致崩溃的原因。

这是 StackTrace：

java.io.FileNotFoundException: http://localhost.com/api/submit_comment?post_id=23856&name=Max&email=Max.Mustermann%40googlemail.com&content=hallo 
at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:206) 
at java.net.URL.openStream(URL.java:470)
at de.example.app.SendComment.doInBackground(ServerManager.java:230)
at de.example.app.SendComment.doInBackground(ServerManager.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)

Answer 1

网址编码存在问题。看看This Link

String query = URLEncoder.encode("apples oranges", "utf-8");
String url = "https://stackoverflow.com/search?q=" + query;