c# 模拟POST,GET访问
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
namespace WeixinPrinter
{
class HttpTool
{
/// <summary>
/// 模拟POST访问
/// </summary>
/// <param name="postUrl">模拟POST的URL</param>
/// <param name="postDataStr">需要POST的数据</param>
/// <returns>模拟访问的网页源代码</returns>
public static string sendPost(string postUrl, string postDataStr)
{
System.Net.ServicePointManager.DefaultConnectionLimit = 100;
System.Net.ServicePointManager.Expect100Continue = false;
//用来存放cookie
CookieContainer cookie = null;
HttpWebRequest request = null;
Stream myRequestStream = null;
HttpWebResponse response = null;
Stream myResponseStream = null;
StreamReader myStreamReader = null;
try
{
//转化
byte[] byteArray = Encoding.UTF8.GetBytes(postDataStr);
cookie = new CookieContainer();
//发送一个POST请求
request = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
request.CookieContainer = cookie;
request.Timeout = 3000;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
myRequestStream = request.GetRequestStream();
myRequestStream.Write(byteArray, 0, byteArray.Length);
myRequestStream.Close();
//获取返回的内容
response = (HttpWebResponse)request.GetResponse();
response.Cookies = cookie.GetCookies(response.ResponseUri);
myResponseStream = response.GetResponseStream();
myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
return myStreamReader.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine("postUrl = " + postUrl + " Exception" + ex);
}
finally
{
if (myStreamReader != null)
{
myStreamReader.Close();
}
if (myResponseStream != null)
{
myResponseStream.Close();
}
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return "";
}
/// <summary>
/// 模拟GET访问
/// </summary>
/// <param name="getUrl">模拟GET的URL</param>
/// <returns>模拟访问的网页源代码</returns>
public static string SendGet(string getUrl)
{
System.Net.ServicePointManager.DefaultConnectionLimit = 100;
HttpWebRequest request = null;
HttpWebResponse response = null;
Stream myResponseStream = null;
StreamReader myStreamReader = null;
try
{
request = (HttpWebRequest)WebRequest.Create(getUrl);
request.Method = "GET";
request.ContentType = "text/html;charset=UTF-8";
request.Timeout = 3000;
response = (HttpWebResponse)request.GetResponse();
myResponseStream = response.GetResponseStream();
myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
return myStreamReader.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine("getUrl = " + getUrl + " Exception" + ex);
}
finally
{
if (myStreamReader != null)
{
myStreamReader.Close();
}
if (myResponseStream != null)
{
myResponseStream.Close();
}
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return "";
}
#region Http下载文件
/// <summary>
/// Http下载文件
/// </summary>
public static string HttpDownloadFile(string url, string path)
{
// 设置参数
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
//发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream responseStream = response.GetResponseStream();
//创建本地文件写入流
Stream stream = new FileStream(path, FileMode.Create);
byte[] bArr = new byte[1024];
int size = responseStream.Read(bArr, 0, (int)bArr.Length);
while (size > 0)
{
stream.Write(bArr, 0, size);
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
stream.Close();
responseStream.Close();
return path;
}
#endregion
#region Http上传文件
/// <summary>
/// Http上传文件
/// </summary>
public static string HttpUploadFile(string url, string path)
{
// 设置参数
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = "POST";
string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线
request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
int pos = path.LastIndexOf("\\");
string fileName = path.Substring(pos + 1);
//请求头部信息
StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
byte[] bArr = new byte[fs.Length];
fs.Read(bArr, 0, bArr.Length);
fs.Close();
Stream postStream = request.GetRequestStream();
postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
postStream.Write(bArr, 0, bArr.Length);
postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
postStream.Close();
//发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream instream = response.GetResponseStream();
StreamReader sr = new StreamReader(instream, Encoding.UTF8);
//返回结果网页（html）代码
string content = sr.ReadToEnd();
return content;
}
#endregion
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
namespace WeixinPrinter
{
class HttpTool
{
/// <summary>
/// 模拟POST访问
/// </summary>
/// <param name="postUrl">模拟POST的URL</param>
/// <param name="postDataStr">需要POST的数据</param>
/// <returns>模拟访问的网页源代码</returns>
public static string sendPost(string postUrl, string postDataStr)
{
System.Net.ServicePointManager.DefaultConnectionLimit = 100;
System.Net.ServicePointManager.Expect100Continue = false;
//用来存放cookie
CookieContainer cookie = null;
HttpWebRequest request = null;
Stream myRequestStream = null;
HttpWebResponse response = null;
Stream myResponseStream = null;
StreamReader myStreamReader = null;
try
{
//转化
byte[] byteArray = Encoding.UTF8.GetBytes(postDataStr);
cookie = new CookieContainer();
//发送一个POST请求
request = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
request.CookieContainer = cookie;
request.Timeout = 3000;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
myRequestStream = request.GetRequestStream();
myRequestStream.Write(byteArray, 0, byteArray.Length);
myRequestStream.Close();
//获取返回的内容
response = (HttpWebResponse)request.GetResponse();
response.Cookies = cookie.GetCookies(response.ResponseUri);
myResponseStream = response.GetResponseStream();
myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
return myStreamReader.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine("postUrl = " + postUrl + " Exception" + ex);
}
finally
{
if (myStreamReader != null)
{
myStreamReader.Close();
}
if (myResponseStream != null)
{
myResponseStream.Close();
}
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return "";
}
/// <summary>
/// 模拟GET访问
/// </summary>
/// <param name="getUrl">模拟GET的URL</param>
/// <returns>模拟访问的网页源代码</returns>
public static string SendGet(string getUrl)
{
System.Net.ServicePointManager.DefaultConnectionLimit = 100;
HttpWebRequest request = null;
HttpWebResponse response = null;
Stream myResponseStream = null;
StreamReader myStreamReader = null;
try
{
request = (HttpWebRequest)WebRequest.Create(getUrl);
request.Method = "GET";
request.ContentType = "text/html;charset=UTF-8";
request.Timeout = 3000;
response = (HttpWebResponse)request.GetResponse();
myResponseStream = response.GetResponseStream();
myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
return myStreamReader.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine("getUrl = " + getUrl + " Exception" + ex);
}
finally
{
if (myStreamReader != null)
{
myStreamReader.Close();
}
if (myResponseStream != null)
{
myResponseStream.Close();
}
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return "";
}
#region Http下载文件
/// <summary>
/// Http下载文件
/// </summary>
public static string HttpDownloadFile(string url, string path)
{
// 设置参数
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
//发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream responseStream = response.GetResponseStream();
//创建本地文件写入流
Stream stream = new FileStream(path, FileMode.Create);
byte[] bArr = new byte[1024];
int size = responseStream.Read(bArr, 0, (int)bArr.Length);
while (size > 0)
{
stream.Write(bArr, 0, size);
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
stream.Close();
responseStream.Close();
return path;
}
#endregion
#region Http上传文件
/// <summary>
/// Http上传文件
/// </summary>
public static string HttpUploadFile(string url, string path)
{
// 设置参数
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = "POST";
string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线
request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
int pos = path.LastIndexOf("\\");
string fileName = path.Substring(pos + 1);
//请求头部信息
StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());
FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
byte[] bArr = new byte[fs.Length];
fs.Read(bArr, 0, bArr.Length);
fs.Close();
Stream postStream = request.GetRequestStream();
postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
postStream.Write(bArr, 0, bArr.Length);
postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
postStream.Close();
//发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream instream = response.GetResponseStream();
StreamReader sr = new StreamReader(instream, Encoding.UTF8);
//返回结果网页（html）代码
string content = sr.ReadToEnd();
return content;
}
#endregion
} }
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