C# HTTP请求 get post
public class HttpRequestHelper
{
public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
return true;
}
/// <summary>
/// 向指定URL发送GET方法的请求
/// </summary>
/// <param name="url">发送请求的URL</param>
/// <param name="param">请求参数，请求参数应该是 name1=value1&name2=value2 的形式。</param>
/// <returns>所代表远程资源的响应结果</returns>
public static string SendGet(string url, string param)
{
string result = String.Empty;
StreamReader reader = null;
try
{
string urlNameString = url + "?" + param;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlNameString);
request.Method = "GET";
request.ContentType = "text/html;charset=UTF-8";
request.Accept = "*/*";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";
#region 没有证书
//ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;
//ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
request = (HttpWebRequest)HttpWebRequest.Create(url);
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
//设置协议类型前设置协议版本req.ProtocolVersion = HttpVersion.Version11;
//这里设置了协议类型。
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
ServicePointManager.CheckCertificateRevocationList = true;
ServicePointManager.DefaultConnectionLimit = 1000;
ServicePointManager.Expect100Continue = false;
#endregion
HttpWebResponse response;
try
{
response = (HttpWebResponse)request.GetResponse();
}
catch (WebException ex)
{
response = (HttpWebResponse)ex.Response;
}
Stream responseStream = response.GetResponseStream();
reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
result = reader.ReadToEnd();
reader.Close();
responseStream.Close();
response.Close();
reader = null;
responseStream = null;
response = null;
}
catch (Exception ex)
{
Console.WriteLine("发送GET请求出现异常：" + ex.Message);
}
finally
{
if (reader != null)
{
reader.Close();
}
}
return result;
}
/// <summary>
/// 向指定URL发送GET方法的请求
/// </summary>
/// <param name="url">发送请求的URL</param>
/// <param name="param">请求参数，请求参数应该是 name1=value1&name2=value2 的形式。</param>
/// <param name="encoding">设置响应信息的编码格式，如utf-8</param>
/// <returns>所代表远程资源的响应结果</returns>
public static string SendGet(string url, string param, string encoding)
{
string result = String.Empty;
StreamReader reader = null;
try
{
string urlNameString = url + "?" + param;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlNameString);
request.Method = "GET";
request.ContentType = "text/html;charset=" + encoding;
request.Accept = "*/*";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
reader = new StreamReader(responseStream, Encoding.GetEncoding(encoding));
result = reader.ReadToEnd();
reader.Close();
responseStream.Close();
response.Close();
reader = null;
responseStream = null;
response = null;
}
catch (Exception ex)
{
Console.WriteLine("发送GET请求出现异常：" + ex.Message);
}
finally
{
if (reader != null)
{
reader.Close();
}
}
return result;
}
/// <summary>
/// 向指定 URL 发送POST方法的请求
/// </summary>
/// <param name="url">发送请求的 URL</param>
/// <param name="jsonData">请求参数，请求参数应该是Json格式字符串的形式。</param>
/// <returns>所代表远程资源的响应结果</returns>
public static string SendPost(string url, string jsonData)
{
string result = String.Empty;
try
{
CookieContainer cookie = new CookieContainer();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.Headers.Add("x-requested-with", "XMLHttpRequest");
request.ServicePoint.Expect100Continue = false;
request.ContentType = "application/x-www-form-urlencoded";
request.Accept = "*/*";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";
request.ContentLength = Encoding.UTF8.GetByteCount(jsonData);
request.CookieContainer = cookie;
using (StreamWriter writer = new StreamWriter(request.GetRequestStream()))
{
writer.Write(jsonData);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
response.Cookies = cookie.GetCookies(response.ResponseUri);
using (Stream responseStream = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(responseStream))
{
result = reader.ReadToEnd();
reader.Close();
}
responseStream.Close();
}
response.Close();
response = null;
request = null;
}
catch (Exception ex)
{
Console.WriteLine("发送GET请求出现异常：" + ex.Message);
}
return result;
}
/// <summary>
/// 向指定 URL 发送POST方法的请求
/// </summary>
/// <param name="url">发送请求的 URL</param>
/// <param name="jsonData">请求参数，请求参数应该是Json格式字符串的形式。</param>
/// <param name="encoding">设置响应信息的编码格式，如utf-8</param>
/// <returns>所代表远程资源的响应结果</returns>
public static string SendPost(string url, string jsonData, string encoding)
{
string result = String.Empty;
try
{
CookieContainer cookie = new CookieContainer();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
request.Headers.Add("x-requested-with", "XMLHttpRequest");
request.ServicePoint.Expect100Continue = false;
request.ContentType = "application/x-www-form-urlencoded";
request.Accept = "*/*";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";
request.ContentLength = Encoding.UTF8.GetByteCount(jsonData);
request.CookieContainer = cookie;
using (StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.GetEncoding(encoding)))
{
writer.Write(jsonData);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
response.Cookies = cookie.GetCookies(response.ResponseUri);
using (Stream responseStream = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding(encoding)))
{
result = reader.ReadToEnd();
reader.Close();
}
responseStream.Close();
}
response.Close();
response = null;
request = null;
}
catch (Exception ex)
{
Console.WriteLine("发送GET请求出现异常：" + ex.Message);
}
return result;
}
/// <summary>
/// 上传媒体文件
/// </summary>
/// <param name="url">上传媒体文件的微信公众平台接口地址</param>
/// <param name="file">要上传的媒体文件对象</param>
/// <returns>返回上传的响应结果，详情参看微信公众平台开发者接口文档</returns>
public static string UploadPost(string url, string file)
{
string result = String.Empty;
try
{
WebClient client = new WebClient();
client.Credentials = CredentialCache.DefaultCredentials;
byte[] responseArray = client.UploadFile(url, "POST", file);
result = System.Text.Encoding.Default.GetString(responseArray, 0, responseArray.Length);
Console.WriteLine("上传result:" + result);
}
catch (Exception ex)
{
result = "Error:" + ex.Message;
Console.WriteLine("发送GET请求出现异常：" + ex.Message);
}
finally
{
Console.WriteLine("上传MediaId:" + result);
}
return result;
}
public static bool DownloadFile(string url, string param, string outFileName)
{
bool result = false;
FileStream fs = null;
try
{
string urlNameString = url + "?" + param;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlNameString);
request.Method = "GET";
request.ContentType = "text/html;charset=UTF-8";
request.Accept = "*/*";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
fs = new FileStream(outFileName, FileMode.Create);
int bufferSize = 2048;
byte[] data = new byte[bufferSize];
int length = 0;
while ((length = responseStream.Read(data, 0, bufferSize)) > 0)
{
fs.Write(data, 0, length);
}
fs.Close();
responseStream.Close();
response.Close();
fs = null;
responseStream = null;
response = null;
result = true;
}
catch (Exception ex)
{
Console.WriteLine("下载媒体文件时出现异常：" + ex.Message);
}
finally
{
if (fs != null)
{
fs.Close();
}
}
return result;
}
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标签：HTTP,string,C#,request,result,reader,post,null,response From： https://www.cnblogs.com/love201314/p/18224838