Question

我正在尝试使用java实现http重定向，一切都按预期工作，除非我第一次提交表单-请求以“待处理”状态发送-未调用httpHandler的handle函数。没有错误讯息。当我再次提交时-会调用handle，并且每条指令都可以正常工作。

我在多种设备和浏览器上进行了尝试。这是html表单，我正在尝试使用add方法提交

<html><body><form method="POST">
  First name:<br>
  <input type="text" name="firstname" >
  <br>
  Last name:<br>
  <input type="text" name="lastname" >
  <br>
  Age:<br>
  <input type="text" name="age" >
  <br><br> 
  <input type="submit" value="Submit" >
</form> </body></html>

HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0);
server.createContext("/students", new StudentController());
server.setExecutor(null);
server.start();

// StudentController class implements HttpHandler
public void handle(HttpExchange httpExchange) {

    int id;
    try {
        String uri = httpExchange.getRequestURI().toString();
        if (uri.equals("/students/add")) {
            add(httpExchange);
        } else {
            index(httpExchange);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

}

private void index(HttpExchange httpExchange) throws IOException {

    String response = getIndex();

    httpExchange.sendResponseHeaders(200, response.length());
    OutputStream os = httpExchange.getResponseBody();
    os.write(response.getBytes());
    os.close();

}

private void add(HttpExchange httpExchange) throws IOException {
    String method = httpExchange.getRequestMethod();
    if (method.equals("GET")) {
        String response = getAdd();
        httpExchange.sendResponseHeaders(200, response.length());
        OutputStream os = httpExchange.getResponseBody();
        os.write(response.getBytes());
    }

    if (method.equals("POST")) {
        InputStreamReader isr = new InputStreamReader(httpExchange.getRequestBody(), "utf-8");
        BufferedReader br = new BufferedReader(isr);
        String formData = br.readLine();

        Map inputs = parseFormData(formData);
        int index = studentList.size();
        String firstName = inputs.get("firstname").toString();
        String lastName = inputs.get("lastname").toString();
        int age = Integer.parseInt(inputs.get("age").toString());
        Student student = new Student(index, firstName, lastName, age);
        studentList.add(student);
        br.close();
        isr.close();

        String url = "/students";
        httpExchange.getResponseHeaders().set("Location", url);
        httpExchange.sendResponseHeaders(303, -1);

    }

}

我希望它在单击首次提交后避免等待处理的请求和运行处理程序。

JAVA HTTP服务器-提交邮寄表格后状态为“待处理”

0 个答案: