c#之HTTP请求get,post带重试参数

小渣渣 · 发表于 2016-3-21 12:39:34

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;
}
}
}

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小渣渣 · 发表于 2016-3-21 12:46:01

/// <summary>
/// HttpWebRequest 通过Post
/// </summary>
/// <param name="url">URI</param>
/// <param name="postData">post数据</param>
/// <returns></returns>
public static string PostDataGetHtml(string url, string postData)
{
try
{
byte[] data = Encoding.UTF8.GetBytes(postData);
Uri uri = new Uri(url);
HttpWebRequest req = WebRequest.Create(uri) as HttpWebRequest;
if (req == null)
{
return "Network error:" + new ArgumentNullException("httpWebRequest").Message;
}
req.Method = "POST";
req.KeepAlive = true;
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = data.Length;
req.AllowAutoRedirect = true;
Stream outStream = req.GetRequestStream();
outStream.Write(data, 0, data.Length);
outStream.Close();
var res = req.GetResponse() as HttpWebResponse;
if (res == null)
{
return "Network error:" + new ArgumentNullException("HttpWebResponse").Message;
}
Stream inStream = res.GetResponseStream();
var sr = new StreamReader(inStream, Encoding.UTF8);
string htmlResult = sr.ReadToEnd();
return htmlResult;
}
catch (Exception ex)
{
return "网络错误(Network error)：" + ex.Message;
}
}
/// <summary>
/// HttpWebRequest 通过get
/// </summary>
/// <param name="url">URI</param>
/// <returns></returns>
public static string GetDataGetHtml(string url)
{
try
{
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.ContentType = "application/x-www-form-urlencoded";
httpWebRequest.Method = "GET";
//对发送的数据不使用缓存
httpWebRequest.AllowWriteStreamBuffering = false;
httpWebRequest.Timeout = 300000;
httpWebRequest.ServicePoint.Expect100Continue = false;
HttpWebResponse webRespon = (HttpWebResponse)httpWebRequest.GetResponse();
Stream webStream = webRespon.GetResponseStream();
if (webStream == null)
{
return "网络错误(Network error)：" + new ArgumentNullException("webStream");
}
StreamReader streamReader = new StreamReader(webStream, Encoding.UTF8);
string responseContent = streamReader.ReadToEnd();
webRespon.Close();
streamReader.Close();
return responseContent;
}
catch (Exception ex)
{
return "网络错误(Network error)：" + ex.Message;
}
}
/// <summary>
/// HttpWebRequest 通过get
/// </summary>
/// <param name="url">URI</param>
/// <returns></returns>
public static bool GetDataGetHtml(string url, string filePath, ref string mg)
{
try
{
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.ContentType = "application/x-www-form-urlencoded";
httpWebRequest.Method = "GET";
//对发送的数据不使用缓存
httpWebRequest.AllowWriteStreamBuffering = false;
httpWebRequest.Timeout = 300000;
httpWebRequest.ServicePoint.Expect100Continue = false;
HttpWebResponse webRespon = (HttpWebResponse)httpWebRequest.GetResponse();
Stream webStream = webRespon.GetResponseStream();
if (webStream == null)
{
return false;
}
StreamReader streamReader = new StreamReader(webStream, Encoding.UTF8);
string responseContent = streamReader.ReadToEnd();
mg = responseContent;
webRespon.Close();
streamReader.Close();
if (responseContent.ToUpper().IndexOf("NULL") > -1)
{
return false;
}
else
{
FileStream fs = new FileStream(filePath, FileMode.Create);
var buff = Encoding.UTF8.GetBytes(responseContent);
fs.Write(buff, buff.Length, 0);
fs.Close();
return true;
}
}
catch (Exception ex)
{
return false;
}
}

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小渣渣 · 发表于 2016-9-22 21:42:48

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小渣渣 · 发表于 2020-11-8 16:22:33

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