C# 调用API接口处理公共类 自带JSON实体互转类
时间：2014-07-10 20:02:05
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using System.Web;
namespace AirMedia.Wap.Core
{
public static class HttpWebHelper
{
/// <SUMMARY>
/// httpwebrequest类中的一些属性的集合
/// </SUMMARY>
public class RequestParam
{
/// <SUMMARY>
/// 获取或设置request类中的Accept属性
/// 用以设置接受的文件类型
/// </SUMMARY>
public string Accept { get; set; }
/// <SUMMARY>
/// 获取或设置request类中的ContentType属性
/// 用以设置请求的媒体类型
/// </SUMMARY>
public string ContentType { get; set; }
/// <SUMMARY>
/// 获取或设置request类中的UserAgent属性
/// 用以设置请求的客户端信息
/// </SUMMARY>
public string UserAgent { get; set; }
/// <SUMMARY>
/// 获取或设置request类中的Method属性
/// 可以将 Method 属性设置为任何 HTTP 1.1 协议谓词：GET、HEAD、POST、PUT、DELETE、TRACE 或 OPTIONS。
/// 如果 ContentLength 属性被设置为 -1 以外的任何值，则必须将 Method 属性设置为上载数据的协议属性。
/// </SUMMARY>
public string Method { get; set; }
/// <summary>
/// 发送的数据
/// </summary>
public byte[] PostData { get; set; }
}
/// <SUMMARY>
/// 构建一个httt请求以获取目标链接的cookies,需要传入目标的登录地址和相关的post信息,返回完成登录的cookies,以及返回的html内容
/// </SUMMARY>
/// <PARAM name="url">登录页面的地址</PARAM>
/// <PARAM name="post">post信息</PARAM>
/// <PARAM name="strHtml">输出的html代码</PARAM>
/// <PARAM name="rppt">请求的标头所需要的相关属性设置</PARAM>
/// <RETURNS>请求完成后的cookies</RETURNS>
public static CookieCollection GetCookie(string url, RequestParam rppt, out string strHtml)
{
CookieCollection ckclReturn = new CookieCollection();
CookieContainer cc = new CookieContainer();
HttpWebRequest hwRequest;
HttpWebResponse hwResponse;
Stream stream;
hwRequest = (HttpWebRequest)HttpWebRequest.Create(new Uri(url));
hwRequest.CookieContainer = cc;
if (rppt != null)
{
hwRequest.Accept = rppt.Accept;
hwRequest.ContentType = rppt.ContentType;
hwRequest.UserAgent = rppt.UserAgent;
hwRequest.Method = rppt.Method;
hwRequest.ContentLength = rppt.PostData.Length;
//写入标头
stream = hwRequest.GetRequestStream();
stream.Write(rppt.PostData, 0, rppt.PostData.Length);
stream.Close();
}
//发送请求获取响应内容
try
{
hwResponse = (HttpWebResponse)hwRequest.GetResponse();
}
catch
{
strHtml = "";
return ckclReturn;
}
stream = hwResponse.GetResponseStream();
StreamReader sReader = new StreamReader(stream, Encoding.UTF8);
strHtml = sReader.ReadToEnd();
sReader.Close();
stream.Close();
//获取缓存内容
ckclReturn = hwResponse.Cookies;
return ckclReturn;
}
/// <SUMMARY>
/// 根据已经获取的有效cookies来获取目标链接的内容
/// </SUMMARY>
/// <PARAM name="strUri">目标链接的url</PARAM>
///<PARAM name="post">post的byte信息</PARAM>
/// <PARAM name="ccl">已经获取到的有效cookies</PARAM>
/// <PARAM name="rppt">头属性的相关设置</PARAM>
/// <RETURNS>目标连接的纯文本:"txt/html"</RETURNS>
public static string GetHtmlByCookies(string strUri, byte[] post, CookieCollection ccl, RequestParam rppt)
{
CookieContainer cc = new CookieContainer();
HttpWebRequest hwRequest;
HttpWebResponse hwResponse;
//构建即将发送的包头
hwRequest = (HttpWebRequest)HttpWebRequest.Create(new Uri(strUri));
cc.Add(ccl);
hwRequest.CookieContainer = cc;
hwRequest.Accept = rppt.Accept;
hwRequest.ContentType = rppt.ContentType;
hwRequest.UserAgent = rppt.UserAgent;
hwRequest.Method = rppt.Method;
hwRequest.ContentLength = post.Length;
//写入post信息
Stream stream;
stream = hwRequest.GetRequestStream();
stream.Write(post, 0, post.Length);
stream.Close();
//发送请求获取响应内容
try
{
hwResponse = (HttpWebResponse)hwRequest.GetResponse();
}
catch
{
return "";
}
stream = hwResponse.GetResponseStream();
StreamReader sReader = new StreamReader(stream, Encoding.Default);
string strHtml = sReader.ReadToEnd();
sReader.Close();
stream.Close();
//返回值
return strHtml;
}
/// <summary>
/// 根据泛型来构建字符串用于post
/// </summary>
/// <param name="dir">带有键值对的泛型</param>
/// <returns>构建完毕的字符串</returns>
public static byte[] CreatePostData(Dictionary<string, string> dir)
{
StringBuilder strPost = new StringBuilder();
foreach (KeyValuePair<string, string> kvp in dir)
{
strPost.Append(kvp.Key);
strPost.Append('=');
if (!string.IsNullOrWhiteSpace(kvp.Value))
{
strPost.Append(System.Web.HttpUtility.UrlEncode(kvp.Value));
}
strPost.Append('&');
}
return CreatePostData(strPost.ToString().TrimEnd('&'));
}
public static byte[] CreatePostData(string input)
{
return Encoding.Default.GetBytes(input);
}
/// <summary>
/// 向指定uri发起GET请求
/// </summary>
/// <param name="uri"></param>
/// <param name="request"></param>
/// <returns></returns>
public static string GET(string url)
{
WebClient wc = new WebClient();
wc.Encoding = System.Text.Encoding.UTF8;
string s = wc.DownloadString(url);
s = HttpUtility.UrlDecode(s);
return s;
}
}
/// <summary>
/// 有关HTTP请求的辅助类
/// </summary>
public class HttpWebResponseUtility
{
private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
/// <summary>
/// 创建GET方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static HttpWebResponse CreateGetHttpResponse(string url, IDictionary<string, string> parameters, int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
StringBuilder buffer = new StringBuilder();
if (!(parameters == null || parameters.Count == 0))
{
int i = 0;
foreach (string key in parameters.Keys)
{
if (i > 0)
{
buffer.AppendFormat("&{0}={1}", key, parameters[key]);
}
else
{
buffer.AppendFormat("{0}={1}", key, parameters[key]);
}
i++;
}
}
if (buffer.Length > 1)
{
url = url + "?" + buffer.ToString();
}
url = HttpUtility.UrlDecode(url);
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "GET";
request.UserAgent = DefaultUserAgent;
if (!string.IsNullOrEmpty(userAgent))
{
request.UserAgent = userAgent;
}
if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
return request.GetResponse() as HttpWebResponse;
}
/// <summary>
/// 创建POST方式的HTTP请求
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="parameters">随同请求POST的参数名称及参数值字典</param>
/// <param name="timeout">请求的超时时间</param>
/// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>
/// <param name="requestEncoding">发送HTTP请求时所用的编码</param>
/// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
/// <returns></returns>
public static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters, int? timeout, string userAgent, Encoding requestEncoding, CookieCollection cookies)
{
if (string.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
if (requestEncoding == null)
{
throw new ArgumentNullException("requestEncoding");
}
HttpWebRequest request = null;
//如果是发送HTTPS请求
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request = WebRequest.Create(url) as HttpWebRequest;
request.ProtocolVersion = HttpVersion.Version10;
}
else
{
request = WebRequest.Create(url) as HttpWebRequest;
}
request.Method = "POST";
// request.ContentType = "application/x-www-form-urlencoded";
request.ContentType = "application/json";
if (!string.IsNullOrEmpty(userAgent))
{
request.UserAgent = userAgent;
}
else
{
request.UserAgent = DefaultUserAgent;
}
if (timeout.HasValue)
{
request.Timeout = timeout.Value;
}
if (cookies != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(cookies);
}
//如果需要POST数据
if (!(parameters == null || parameters.Count == 0))
{
StringBuilder buffer = new StringBuilder();
int i = 0;
foreach (string key in parameters.Keys)
{
if (i > 0)
{
buffer.AppendFormat("&{0}={1}", key, parameters[key]);
}
else
{
buffer.AppendFormat("{0}={1}", key, parameters[key]);
}
i++;
}
byte[] data = requestEncoding.GetBytes(buffer.ToString());
using (Stream stream = request.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
}
return request.GetResponse() as HttpWebResponse;
}
private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
return true; //总是接受
}
public static string PostXml(string url, string xml)
{
byte[] bytes = Encoding.UTF8.GetBytes(xml);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.ContentLength = bytes.Length;
request.ContentType = "text/xml";
using (Stream requestStream = request.GetRequestStream())
{
requestStream.Write(bytes, 0, bytes.Length);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode != HttpStatusCode.OK)
{
string message = String.Format("POST failed. Received HTTP {0}",
response.StatusCode);
throw new ApplicationException(message);
}
System.IO.StreamReader sr = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("utf-8"));
string res = sr.ReadToEnd();
sr.Close();
response.Close();
return res;
}
}
}
调用
string requestUrl = CoreInterface.ApiDomain + "api/Login/AddQRLog?grid={0}&ad={1}&grName={2}&vc={3}&br={4}&sc={5}&ts={6}&ps={7}";
requestUrl = string.Format(requestUrl, grid, ad, grName, vc, br, sc, ts, ps);
string resultJson = "";
//try
//{
HttpWebResponse response = HttpWebResponseUtility.CreateGetHttpResponse(requestUrl, null, 1000000, "", null, null);
System.IO.StreamReader sr = new System.IO.StreamReader(response.GetResponseStream());
resultJson = sr.ReadToEnd();
sr.Close();
//}
//catch (Exception)
//{
// return RedirectToAction("Index", "Error");
//}
C# 自带JSON转换类
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.Serialization.Json;
namespace AirMedia.Wap.Core
{
public static class JsonHelper
{
#region DataContractJsonSerializer
/// <summary>
/// 对象转换成json
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonObject">需要格式化的对象</param>
/// <returns>Json字符串</returns>
public static string DataContractJsonSerialize<T>(T jsonObject)
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
string json = null;
using (MemoryStream ms = new MemoryStream()) //定义一个stream用来存发序列化之后的内容
{
serializer.WriteObject(ms, jsonObject);
json = Encoding.UTF8.GetString(ms.GetBuffer()); //将stream读取成一个字符串形式的数据，并且返回
ms.Close();
}
return json;
}
/// <summary>
/// json字符串转换成对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="json">要转换成对象的json字符串</param>
/// <returns></returns>
public static T DataContractJsonDeserialize<T>(string json)
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
T obj = default(T);
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))
{
obj = (T)serializer.ReadObject(ms);
ms.Close();
}
return obj;
}
#endregion
}
}
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