【问题标题】："POST /receiver/ HTTP/1.1" 500 137512“POST /receiver/HTTP/1.1”500 137512
【发布时间】：2014-02-24 08:20:49
【问题描述】：

服务器端 - 使用 Django 框架进行 Python 编程：

views.py

from django.http import HttpResponse
from django.shortcuts import render
from django.views.decorators.csrf import csrf_exempt
import django.utils.simplejson as json

@csrf_exempt
def rcvr(request):
    if request.method=='POST':  
        objs = request.POST.get['username']
        return render(request, "post.html",{'username': username})
    else:
        return HttpResponse("Failure...")

urls.py

from django.conf.urls import patterns, include, url
from django.contrib import admin
from receiver import views
admin.autodiscover()
urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'woodpecker.views.home', name='home'),
    # url(r'^woodpecker/', include('woodpecker.foo.urls')),
    # Uncomment the admin/doc line below to enable admin documentation:
    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),
    # Uncomment the next line to enable the admin:
    url(r'^admin/', include(admin.site.urls)),
    url(r'^receiver/', views.rcvr, name='rcvr'),
)

rcvr.html

<html>
    <head></head>
    <body>        
        <form action="{% url 'woodpecker.receiver.views.rcvr' %}" method="post">{% csrf_token %}
            <input type="text" name="username">
            <input type="submit" id="click1" value="username">
        </form>
    </body>
</html>

客户端 - Android 应用程序

package com.example.postjson;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpResponse;
import org.apache.http.client.*;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;

public class MainActivity extends Activity{
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        HttpClient httpclient = new DefaultHttpClient();         
        try{
            HttpPost post = new HttpPost("http://10.0.2.2:8000/receiver/");
            post.setHeader("Content-type", "application/json");
            post.setHeader("Accept","application/json");
            JSONObject obj=new JSONObject();
            obj.put("username", "abcd");
            obj.put("password","1234");
            post.setEntity(new StringEntity(obj.toString(),"UTF-8"));
            System.out.println("Yo...Yo...!! B-) ");             

            HttpResponse response = httpclient.execute(post);

            }catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }catch (ClientProtocolException e) {
                e.printStackTrace();
            }catch (IOException e) {
                e.printStackTrace();
            }catch(NullPointerException e){
                e.printStackTrace();
            }catch(Exception e){
                e.printStackTrace();
            }
        }

    @Override
    public boolean onCreateOptionsMenu(Menu menu){
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

每当我从模拟器运行我的应用程序时，我都会收到 500 错误...

[root@vivek-vaio woodpecker]# python manage.py runserver
Validating models...

0 errors found
January 31, 2014 - 20:04:54
Django version 1.5.4, using settings 'woodpecker.settings'
Development server is running at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
[31/Jan/2014 20:04:57] "GET /receiver/ HTTP/1.1" 200 10
[01/Feb/2014 09:55:21] "POST /receiver/ HTTP/1.1" 500 137512
Internal Server Error: /receiver/
Traceback (most recent call last):
    File "/usr/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
    File "/usr/lib/python2.7/site-packages/django/views/decorators/csrf.py", line 77, in  wrapped_view
    return view_func(*args, **kwargs)
    File "/home/vivek/PROJECT/Server_Work/woodpecker/receiver/views.py", line 21, in rcvr
    return render(request, "rcvr.html",{'username': objs})
    File "/usr/lib/python2.7/site-packages/django/shortcuts/__init__.py", line 53, in render
    return HttpResponse(loader.render_to_string(*args, **kwargs),
    File "/usr/lib/python2.7/site-packages/django/template/loader.py", line 177, in render_to_string
    return t.render(context_instance)
    File "/usr/lib/python2.7/site-packages/django/template/base.py", line 140, in render
    return self._render(context)
    File "/usr/lib/python2.7/site-packages/django/template/base.py", line 134, in _render
    return self.nodelist.render(context)
    File "/usr/lib/python2.7/site-packages/django/template/base.py", line 830, in render
    bit = self.render_node(node, context)
    File "/usr/lib/python2.7/site-packages/django/template/debug.py", line 74, in render_node
    return node.render(context)
    File "/usr/lib/python2.7/site-packages/django/template/defaulttags.py", line 404, in render
    raise NoReverseMatch("'url' requires a non-empty first argument. "
    NoReverseMatch: 'url' requires a non-empty first argument. The syntax changed in Django 1.5, see the docs.
[01/Feb/2014 09:55:33] "POST /receiver/ HTTP/1.1" 500 137512

谁能帮帮我？？有 500 错误？？？

【问题讨论】：

您解决问题了吗？在这种情况下，如果您能用问题和解决方案来回答问题，那就太好了。

标签： android python json django

【解决方案1】：

HTTP 500 错误表明代码中存在一些运行时错误。我发现了错误！ JSON 数据总是在请求组件的 body 中。行号9已更新，错误已成功排除。

from django.http import HttpResponse
from django.shortcuts import render
from django.views.decorators.csrf import csrf_exempt
import django.utils.simplejson as json

@csrf_exempt
def rcvr(request):
    if request.method=='POST':
        data = json.loads(request.body.decode(encoding='UTF-8'))
        if data != None:
            username = data['username']
            return HttpResponse(username)
        else:
            return HttpResponse("Nothing was received!")
    else:
        return HttpResponse("POST Error!")

【讨论】：

【解决方案2】：

您的视图中缺少一些完全启用 CSRF 的步骤。我假设 CSRF 是问题所在，因为如果未正确启用它会抛出 403。

https://docs.djangoproject.com/en/dev/ref/contrib/csrf/

【讨论】：

好的，谢谢...我得到了问题...我解决了 403 错误...正如你所说，我错过了一些步骤..!!!但是，现在我收到 500 错误...你能帮我解决这个问题吗...问题已被编辑！！！