[英]How do I properly post to a php web service using JSON and C#
I'm trying to contact a simple login web service that will determine whether the JSON request was successful or not. 我正在尝试联系一个简单的登录Web服务,该服务将确定JSON请求是否成功。 Currently, in the C# program I am geting an error saying a JSON argument is missing. 当前,在C#程序中,我收到一条错误消息,说缺少JSON参数。 The proper URL to request in the web browser is: 在Web浏览器中请求的正确URL是:
https://devcloud.fulgentcorp.com/bifrost/ws.php?json=[{"action":"login"},{"login":"demouser"},{"password":"xxxx"},{"checksum":"xxxx"}]
The code that I have implemented right now in C# is: 我现在在C#中实现的代码是:
using System;
using System.IO;
using System.Net;
using System.Text;
using System.Web.Script.Serialization;
namespace request
{
class MainClass
{
public static void Main (string[] args)
{
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://devcloud.fulgentcorp.com/bifrost/ws.php?");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = new JavaScriptSerializer().Serialize(new
{
action = "login",
login = "demouser",
password = "xxxx",
checksum = "xxxx"
});
Console.WriteLine ("\n\n"+json+"\n\n");
streamWriter.Write(json);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var result = streamReader.ReadToEnd();
Console.WriteLine (result);
}
}
}
}
It looks like the sample URL is passing the JSON as a query string - it is a simple GET request. 看起来示例URL正在将JSON作为查询字符串传递-这是一个简单的GET请求。
You are trying to POST the JSON - which is a much better approach that passing JSON in the query string - ie because of length limitations, and the need to escape simple characters such as space. 您正在尝试发布JSON(这是一种比在查询字符串中传递JSON更好的方法),即由于长度限制以及需要转义简单字符(例如空格)的原因。 But it will not work as does your sample URL. 但这不会像您的示例URL那样起作用。
If you are able to modify the server I would suggest modifying the PHP to use $_REQUEST['action'] to consume the data, and the following C# code: 如果您能够修改服务器,我建议您修改PHP以使用$ _REQUEST ['action']来使用数据,以及以下C#代码:
Public static void Main (string[] args)
{
using (var client = new WebClient())
{
var Parameters = new NameValueCollection {
{action = "login"},
{login = "demouser"},
{password = "xxxx"},
{checksum = "xxxx"}
httpResponse = client.UploadValues( "https://devcloud.fulgentcorp.com/bifrost/ws.php", Parameters);
Console.WriteLine (httpResponse);
}
}
If you must pass JSON as a query string, you can use UriBuilder to safely create the full URL + Query String and then make the GET request - no need to POST. 如果必须将JSON作为查询字符串传递,则可以使用UriBuilder安全地创建完整的URL +查询字符串,然后发出GET请求-无需POST。
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