public class WebHttp
{
/// <summary>
/// get请求带重试
/// </summary>
/// <param name="Url"></param>
/// <param name="postDataStr"></param>
/// <param name="sum"></param>
/// <returns></returns>
public static string HttpGet(string Url, string postDataStr, int sum)
{
string temp=null;
for (int i = 0; i < sum; i++)
{
if (string.IsNullOrEmpty(temp) || string.IsNullOrEmpty(temp.Trim()))
{
temp = HttpGet(Url, postDataStr);
}
else {
break;
}
}
return temp;
}
/// <summary>
/// post请求带重试
/// </summary>
/// <param name="Url"></param>
/// <param name="postDataStr"></param>
/// <param name="sum"></param>
/// <returns></returns>
public static string HttpPost(string Url, string postDataStr, int sum)
{
string temp = null;
for (int i = 0; i < sum; i++)
{
if (string.IsNullOrEmpty(temp) || string.IsNullOrEmpty(temp.Trim()))
{
temp = HttpPost(Url, postDataStr);
}
else
{
break;
}
}
return temp;
}
/// <summary>
/// GET请求与获取结果
/// </summary>
public static string HttpGet(string Url, string postDataStr)
{
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr);
request.Method = "GET";
request.ContentType = "text/html;charset=UTF-8";
request.Timeout = 10000;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
return retString;
}
catch (Exception ex)
{
return null;
}
}
/// <summary>
/// POST请求与获取结果
/// </summary>
public static string HttpPost(string Url, string postDataStr)
{
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
request.Method = "POST";
request.Timeout = 6000000;
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postDataStr.Length;
StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.ASCII);
writer.Write(postDataStr);
writer.Flush();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
string encoding = response.ContentEncoding;
if (encoding == null || encoding.Length < 1)
{
encoding = "UTF-8"; //默认编码
}
StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));
string retString = reader.ReadToEnd();
return retString;
}
catch (Exception ex)
{
return null;
}
}
} /// <summary>
/// Http (GET/POST)
/// </summary>
/// <param name="url">请求URL</param>
/// <param name="parameters">请求参数</param>
/// <param name="method">请求方法</param>
/// <returns>响应内容</returns>
public string HttpSendPost(string url, IDictionary<string, string> parameters, string method)
{
if (method.ToLower() == "post")
{
HttpWebRequest req = null;
HttpWebResponse rsp = null;
System.IO.Stream reqStream = null;
try
{
req = (HttpWebRequest)WebRequest.Create(url);
req.Method = method;
req.KeepAlive = false;
req.ProtocolVersion = HttpVersion.Version10;
req.Timeout = 5000;
req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
byte[] postData = Encoding.UTF8.GetBytes(BuildQuery(parameters, "utf8"));
reqStream = req.GetRequestStream();
reqStream.Write(postData, 0, postData.Length);
rsp = (HttpWebResponse)req.GetResponse();
Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
return GetResponseAsString(rsp, encoding);
}
catch (Exception ex)
{
return ex.Message;
}
finally
{
if (reqStream != null) reqStream.Close();
if (rsp != null) rsp.Close();
}
}
else
{
//创建请求
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "?" + BuildQuery(parameters, "utf8"));
//GET请求
request.Method = "GET";
request.ReadWriteTimeout = 5000;
request.ContentType = "text/html;charset=UTF-8";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
//返回内容
string retString = myStreamReader.ReadToEnd();
return retString;
}
}
/// <summary>
/// 组装普通文本请求参数。
/// </summary>
/// <param name="parameters">Key-Value形式请求参数字典</param>
/// <returns>URL编码后的请求数据</returns>
public static string BuildQuery(IDictionary<string, string> parameters, string encode)
{
StringBuilder postData = new StringBuilder();
bool hasParam = false;
IEnumerator<KeyValuePair<string, string>> dem = parameters.GetEnumerator();
while (dem.MoveNext())
{
string name = dem.Current.Key;
string value = dem.Current.Value;
// 忽略参数名或参数值为空的参数
if (!string.IsNullOrEmpty(name))//&& !string.IsNullOrEmpty(value)
{
if (hasParam)
{
postData.Append("&");
}
postData.Append(name);
postData.Append("=");
if (encode == "gb2312")
{
postData.Append(HttpUtility.UrlEncode(value, Encoding.GetEncoding("gb2312")));
}
else if (encode == "utf8")
{
postData.Append(HttpUtility.UrlEncode(value, Encoding.UTF8));
}
else
{
postData.Append(value);
}
hasParam = true;
}
}
return postData.ToString();
}
/// <summary>
/// 把响应流转换为文本。
/// </summary>
/// <param name="rsp">响应流对象</param>
/// <param name="encoding">编码方式</param>
/// <returns>响应文本</returns>
public static string GetResponseAsString(HttpWebResponse rsp, Encoding encoding)
{
System.IO.Stream stream = null;
StreamReader reader = null;
try
{
// 以字符流的方式读取HTTP响应
stream = rsp.GetResponseStream();
reader = new StreamReader(stream, encoding);
return reader.ReadToEnd();
}
finally
{
// 释放资源
if (reader != null) reader.Close();
if (stream != null) stream.Close();
if (rsp != null) rsp.Close();
}
}
