我试图将服务器端Ajax响应脚本转换为Django HttpResponse,但显然它不起作用。

这是服务器端脚本:

/* RECEIVE VALUE */
$validateValue=$_POST['validateValue'];
$validateId=$_POST['validateId'];
$validateError=$_POST['validateError'];

/* RETURN VALUE */
$arrayToJs = array();
$arrayToJs[0] = $validateId;
$arrayToJs[1] = $validateError;

if($validateValue =="Testuser"){  // Validate??
    $arrayToJs[2] = "true";       // RETURN TRUE
    echo '{"jsonValidateReturn":'.json_encode($arrayToJs).'}';  // RETURN ARRAY WITH success
}
else{
    for($x=0;$x<1000000;$x++){
        if($x == 990000){
            $arrayToJs[2] = "false";
            echo '{"jsonValidateReturn":'.json_encode($arrayToJs).'}';   // RETURNS ARRAY WITH ERROR.
        }
    }
}

这是转换后的代码

def validate_user(request):
    if request.method == 'POST':
        vld_value = request.POST.get('validateValue')
        vld_id = request.POST.get('validateId')
        vld_error = request.POST.get('validateError')

        array_to_js = [vld_id, vld_error, False]

        if vld_value == "TestUser":
            array_to_js[2] = True
            x = simplejson.dumps(array_to_js)
            return HttpResponse(x)
        else:
            array_to_js[2] = False
            x = simplejson.dumps(array_to_js)
            error = 'Error'
            return render_to_response('index.html',{'error':error},context_instance=RequestContext(request))
    return render_to_response('index.html',context_instance=RequestContext(request))

我使用simplejson来编码Python列表(因此它将返回一个JSON数组)。我还不能解决这个问题。但是我想我对“回声”做错了什么。


当前回答

通过这种方式,json内容可以作为具有特定文件名的文件下载。

import json
from django.http import HttpResponse

def download_json(request):
    data = {'some': 'information'}

    # serialize data obj as a JSON stream 
    data = json.dumps(data)
    response = HttpResponse(data, content_type='application/json charset=utf-8')

    # add filename to response
    response['Content-Disposition'] = 'attachment; filename="filename.json"'
    return response

其他回答

通过这种方式,json内容可以作为具有特定文件名的文件下载。

import json
from django.http import HttpResponse

def download_json(request):
    data = {'some': 'information'}

    # serialize data obj as a JSON stream 
    data = json.dumps(data)
    response = HttpResponse(data, content_type='application/json charset=utf-8')

    # add filename to response
    response['Content-Disposition'] = 'attachment; filename="filename.json"'
    return response

我通常使用字典而不是列表来返回JSON内容。

import json

from django.http import HttpResponse

response_data = {}
response_data['result'] = 'error'
response_data['message'] = 'Some error message'

在django 1.7之前,你会这样返回它:

return HttpResponse(json.dumps(response_data), content_type="application/json")

对于Django 1.7+,使用JsonResponse,如下所示:

from django.http import JsonResponse
return JsonResponse({'foo':'bar'})

首先导入这个:

from django.http import HttpResponse

如果你已经有JSON:

def your_method(request):
    your_json = [{'key1': value, 'key2': value}]
    return HttpResponse(your_json, 'application/json')

如果你从另一个HTTP请求得到JSON:

def your_method(request):
    response = request.get('https://www.example.com/get/json')
    return HttpResponse(response, 'application/json')

在View中使用:

form.field.errors|striptags

在没有HTML的情况下获得验证消息

Django代码views.py:

def view(request):
    if request.method == 'POST':
        print request.body
        data = request.body
        return HttpResponse(json.dumps(data))

HTML代码view.html:

<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("#mySelect").change(function(){
        selected = $("#mySelect option:selected").text()
        $.ajax({
            type: 'POST',
            dataType: 'json',
            contentType: 'application/json; charset=utf-8',
            url: '/view/',
            data: {
                    'fruit': selected
                  },
            success: function(result) {
                        document.write(result)
                    }
    });
  });
});
</script>
</head>
<body>

<form>
    {{data}}
    <br>
Select your favorite fruit:
<select id="mySelect">
  <option value="apple" selected >Select fruit</option>
  <option value="apple">Apple</option>
  <option value="orange">Orange</option>
  <option value="pineapple">Pineapple</option>
  <option value="banana">Banana</option>
</select>
</form>
</body>
</html>