从我的控制器而不是从我的 asp.net mvc web 应用程序中的视图调用 JSON API [英] Calling a JSON API from my controller instead of from the view in my asp.net mvc web application

问题描述

我需要从我的 asp.ner mvc web 应用程序为 BPM 引擎调用 JSON API.对 BPM 的 API 调用构造如下:-

I need to call a JSON API for a BPM engine from my asp.ner mvc web application . The API call to the BPM is constructed as follow:-

http://localhost:8080/jw/web/json/workflow/process/list?j_username=kermit&hash=9449B5ABCFA9AFDA36B801351ED3DF66&loginAs=' + username

j_user 和hash 参数代表在 BPM 引擎端设置的主登录用户名和密码.目前我正在从我的 asp.net mvc 的视图级别使用 java/script 调用 API:-

where both the j_user & hash paramertes represents a master login username and password which are set at the BPM engine side. Currently i am calling the API using java/script at the view level from my asp.net mvc:-

$(document).ready(function () {
    var fullurl = 'http://localhost:8080/jw/web/json/workflow/package/list?j_username=kermit&hash=9449B5ABCFA9AFDA36B801351ED3DF66&loginAs=' + username ;
    $.ajax({
        type: "GET",
        url: fullurl, 

        dataType: "JSONP",
        // contentType: "application/json; charset=utf-8",
        success: function (result) {

            $.each(result.data, function (key, val) {

                // Format the text to display.
             //   var str = val.packageName + ' | ' + val.packageId;
                var str = val.packageName ;
                // Add a list item for the product.
                $('<li/>', { text: str })
                .appendTo($('#products'));

            });
        }
    });


});

但有人告诉我，在 asp.net mvc 中暴露主登录用户名和密码以及代表登录用户的用户名的 LoginAS 用户名是不安全的，我应该在此执行 API 调用服务器端，而不是从 JAVASCRIPT 进行 API 调用.

But i was told that exposing both the master-login username and password and also the LoginAS username which represents the username of the login user at the asp.net mvc is not secure, AND THAT I SHOULD PERFORM THE API CALL AT THE SERVER SIDE INSTEAD OF MAKING THE API CALL FROM A JAVASCRIPT.

但我的问题是如何将上面的代码转换为从 mvc 控制器端接收 JSON，然后将 JSON 传递给视图?最好的问候

but my question is how i can convert my above code to receive the JSON from the mvc controller side and then pass the JSON to the view? Best Regards

推荐答案

您可以使用 WebClient 向指定的 url 发起 HTTP 请求:

You could use a WebClient to fire an HTTP request to the specified url:

public class PackagesController: Controller
{
    public ActionResult List()
    {
        using (var client = new WebClient())
        {
            var query = HttpUtility.ParseQueryString(string.Empty);
            query["j_username"] = "kermit";
            query["hash"] = "9449B5ABCFA9AFDA36B801351ED3DF66";
            query["loginAs"] = "some_username";
            var url = new UriBuilder("http://localhost:8080/jw/web/json/workflow/package/list");
            url.Query = query.ToString();
            string json = client.DownloadString(url.ToString());
            return Content(json, "application/json");
        }
    }
}

或者您可以使用新的 HttpClient 在 .NET 4.5 中引入:

or you could use the new HttpClient introduced in .NET 4.5:

public class PackagesController : AsyncController
{
    public async Task<ActionResult> ListPackages()
    {
        using (var client = new HttpClient())
        {
            var query = HttpUtility.ParseQueryString(string.Empty);
            query["j_username"] = "kermit";
            query["hash"] = "9449B5ABCFA9AFDA36B801351ED3DF66";
            query["loginAs"] = "some_username";
            var url = new UriBuilder("http://localhost:8080/jw/web/json/workflow/package/list");
            url.Query = query.ToString();
            var response = await client.GetAsync(url.ToString());
            var result = await response.Content.ReadAsStringAsync();
            return Content(result, "application/json");
        }
    }
}

并从您的 javascript 向上述操作发送 AJAX 请求:

and from your javascript send an AJAX request to the aforementioned action:

<script type="text/javascript">
    $(document).ready(function () {
        $.ajax({
            url: '@Url.Action("List", "Packages")', 
            type: 'GET',
            cache: false,
            success: function (result) {
                $.each(result.data, function (key, val) {
                    var str = val.packageName;
                    $('<li/>', { text: str })
                        .appendTo($('#products'));
                });
            }
        });
    });
</script>

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