对方定义的Web接口,参数是JSON,返回也是JSON
对方服务需要登录,并且对SessionID加密作为通信凭据,系统的WebClient不具备保持Session的功能,因此对WebClient做了扩展。如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Collections;
using Newtonsoft.Json.Linq;
class HttpUtil
{
private CookieAwareWebClient client;
public HttpUtil()
{
client = new CookieAwareWebClient();
}
public JObject post(string url, JObject jObj)
{
client.Headers.Add("Content-Type", "text/html");
string content = "[" + jObj.ToString() + "]";
byte[] postBytes = Encoding.UTF8.GetBytes(content);
string returnValue = "";
try
{
byte[] responseArray = client.UploadData(url, "POST", postBytes);
returnValue = Encoding.UTF8.GetString(responseArray);
}
catch (Exception ex)
{
string message = ex.Message;
}
returnValue = returnValue.Substring(1, returnValue.Length - 2);
return JObject.Parse(returnValue);
}
public void dispose()
{
client.Dispose();
}
}
class CookieAwareWebClient : WebClient
{
public CookieAwareWebClient()
: this(new CookieContainer())
{ }
public CookieAwareWebClient(CookieContainer c)
{
this.CookieContainer = c;
}
public CookieContainer CookieContainer { get; set; }
protected override WebRequest GetWebRequest(Uri address)
{
WebRequest request = base.GetWebRequest(address);
if (request is HttpWebRequest)
{
(request as HttpWebRequest).CookieContainer = this.CookieContainer;
}
return request;
}
}
C#操作JSON用到的DLL见附件。
PS:JArray是C#的JSON数组对象,调用ToString()方法时,会添加[]符号表示数组。JArray的使用和JSON类似,直接使用Parse方法即可。
PS2:貌似C#3.5自带生成JSON,不需要再使用Newtonsoft.Json了。
以上