Question

我正在尝试读取请求InputStream，但已到达流的末尾。

唯一的类（servlet）是：


    public class TestServlet extends HttpServlet
    {
        protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
        {
            InputStream clientIn = request.getInputStream();
            OutputStream clientOut = response.getOutputStream();
            byte[] buffer = new byte[4096];
            int n;
            try
            {
                while ((n = clientIn.read(buffer)) != -1)    // --------->  Here, n is -1
                {
                    System.out.println(new String(buffer,0,n));
                    clientOut.write(("Ok = " + n).getBytes());
                }
            }
            catch (Exception e)
            {
                System.err.println(e);
            }
        }
    }

没有任何其他类（例如过滤器，监听器或其他servlet）

，客户端代码为：

    public class Main
    {
        public static void main(String[] args) throws IOException, InterruptedException
        {   
            String postCommand = "POST / HTTP/1.1\r\n" +
                    "Host: localhost\r\n" +
                    "Content-Type: binary/octet-stream\r\n" +
                    "Connection: keep-alive\r\n\r\n" +
                    "name1=value1&name2=value2";

            Socket socket = new Socket("localhost", 8080);
            InputStream serverIn = socket.getInputStream();
            OutputStream serverOut = socket.getOutputStream();
            serverOut.write(postCommand.getBytes());
            int n = 0, count = 1;
            byte[] buffer = new byte[4096];
            do
            {
                if (n != 0)
                    System.out.println(new String(buffer, 0, n));
                serverOut.write(("foo " + count).getBytes());
            } while ((n = serverIn.read(buffer)) != -1 && count++

提前谢谢你。亲切的问候！

Answer 1

您的客户端未发送有效的HTTP 1.1。没有内容长度标头，因此Servlet无法知道何时停止读取。没有实际的流结束，因为HTTP客户端必须保持连接打开才能读取响应。

使用HttpURLConnection。

HttpServletRequest InputStream读取返回-1

1 个答案: