模型仅在指定 Windows 服务时响应

Posted 2023-02-24

【中文标题】模型仅在指定 Windows 服务时响应

【英文标题】：Model only responds if Windows Service is specified

【发布时间】：2016-03-28 21:21:44

【问题描述】：

在我的views.py 中，我通过模板通过 ajax 传递模型对象。它不响应，但如果提到服务，它就会响应。谁能告诉我为什么？

views.py：

def serv(request):
    if request.method == 'POST':
        if request.is_ajax():
            pythoncom.CoInitialize()
            service = request.POST.get('service')
            service_name = request.POST.get('service_name')

        # THIS "service_name" IS NOT GETTING RECOGNIZED BY WMI FUNCTION

            if service == 'stop':
                from socket import *
                c = wmi.WMI()
                for service in c.Win32_Service(Name=service_name):
                    result, = service.StopService()
                numb = 'Service stopped'
                data = "status": numb
                return JsonResponse(data)

            if service == 'start':
                from socket import *
                c = wmi.WMI()
                for service in c.Win32_Service(Name=service_name):
                    result, = service.StartService()
                numb = 'Service started'
                data = "status": numb
                return JsonResponse(data)

           pythoncom.CoUninitialize()

    return render(request,'django/index.html')

模板代码：

% if category %
    % if pages %
        % for page in pages %
            <div class="form-group">
                <form method="POST">
                    % csrf_token % 
                    <h4> page.title </h4>
                    <div class="col-xs-4">
                        <select class="form-control" id=" page.service " name="service">
                            <option id="start" value="start">start</option>
                            <option id="stop" value="stop">Stop</option>
                        </select>
                    </div>
                    <button class="btn btn-primary" id=" page.title " type="submit">Execute</button>
                    <span id=" page.result " class="label label-default"></span>
                </form>
            </div>
        % endfor %

        </ul>
    % else %
        <strong>No pages currently in category.</strong>
    % endif %
% else %
    The specified category  category_name  does not exist!
% endif %
</br>
% if category %
     <a class="btn btn-default" href="/rango/category/ category_name_slug /add_page/">Add a New Service</a><br />
% else %
    A category by this name does not exist
% endif %

Javascript：

function getCookie(name) 
    var cookieValue = null;
    if (document.cookie && document.cookie != '') 
        var cookies = document.cookie.split(';');
        for (var i = 0; i < cookies.length; i++) 
            var cookie = jQuery.trim(cookies[i]);
            // Does this cookie string begin with the name we want?
            if (cookie.substring(0, name.length + 1) == (name + '=')) 
                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                break;
            
        
    
    return cookieValue;


//For doing AJAX post
$("# page.title ").click(function(e) 

    e.preventDefault();
    var csrftoken = getCookie('csrftoken');
    var service = $("# page.service ").val();
    var service_name = $("# page.title ").val();

    $.ajax(
        url: ' page.url ', // the endpoint,commonly same url
        type: "POST", // http method
        data: 
            csrfmiddlewaretoken: csrftoken,
            service: service,
            service_name: service_name
        , // data sent with the post request

        // handle a successful response
        success: function(json) 
            console.log(json); // another sanity check
            //On success show the data posted to server as a message
            $("# page.result ").append( 'Response:' + json.status);
        ,

        // handle a non-successful response
        error: function(xhr, errmsg, err) 
            console.log(xhr.status + ": " + xhr.responseText); // provide a bit more info about the error to the console
        
    );
);

如果windows服务的名称（这里是控制的）在

for service in c.Win32_Service(Name="bthserv"): //Just an example of what works

【问题讨论】：

当你发布请求时service_name 有什么价值？

服务名的值取自Page模型，var service_name = $("# page.title ").val();

如果是这样就不会出现错误，那么当您在视图中设置断点时，service_name 会显示什么值？

你的 js 代码具体在哪里？在模板中还是在不同的 js 文件中？在第一种情况下，模板到底在哪里？在这两种情况下，您期望像 "$("# page.title ")" 评估到什么？

我现在检查正确，当它通过时，service_name 显示空白，而服务（这是另一个为启动/停止（不是来自模型）传递的变量）正在显示。任何线索为什么？跨度>

【参考方案1】：

你想要的

 var service_name = $("# page.title ").get(0).id;

这实际上是一种非常复杂的写作方式：

var service_name = " page.title ";