using System;
using System.IO;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Collections.Generic;
public class HttpUtil
{
/// <summary>
/// 通用http方法
/// </summary>
/// <param name="url">请求地址</param>
/// <param name="postData">发送的数据</param>
/// <param name="encoding">发送的编码格式</param>
/// <param name="contentType">内容类型，取值推荐从本工具类的"HttpContentType"中取</param>
/// <param name="postType">发送类型</param>
/// <param name="headDic">头字典</param>
/// <returns></returns>
public static string HttpMethod(string url, string postData, Encoding encoding, string contentType, PostType postType, Dictionary<string, string> headDic)
{
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Ssl3;
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
}
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = postType.ToString();
request.Accept = "*/*";
request.ContentType = contentType;
request.Credentials = CredentialCache.DefaultCredentials;
//用户标识一定要加,不然有些严一点的网站会返回错误信息，比如说微信的，不按照规范来，很容易403
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; QQWubi 133; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; CIBA; InfoPath.2)";
request.ProtocolVersion = HttpVersion.Version10;
//添加请求头
if (headDic != null && headDic.Count > 0)
{
Dictionary<string, string>.Enumerator it = headDic.GetEnumerator();
while (it.MoveNext())
{
request.Headers.Add(it.Current.Key, it.Current.Value);
}
}
if (!string.IsNullOrEmpty(postData))
{
byte[] buffer = encoding.GetBytes(postData);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
}
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
try
{
using (StreamReader reader = new StreamReader(response.GetResponseStream(), encoding))
{
return reader.ReadToEnd();
}
}
catch (WebException ex)
{
//这一步很有必要，因为有的地方会把错误信息放在异常里面，但是直接ex.message是看不到具体信息的，只有显示403拒绝访问
response = (HttpWebResponse)ex.Response;
using (StreamReader reader = new StreamReader(response.GetResponseStream(), encoding))
{
return reader.ReadToEnd();
}
}
finally
{
response.Close();
}
}
/// <summary>
/// httprequest的formdata传参
/// </summary>
/// <param name="url"></param>
/// <param name="postData">存放字符串参数的键值对</param>
/// <param name="fileData">存放文件参数的键值对 参数名，文件完整路径</param>
/// <param name="encoding">字符编码</param>
/// <param name="postType">发送方式</param>
/// <param name="headDic">请求头，根据需求来，可为空</param>
/// <returns></returns>
public static string HttpMethod(string url, Dictionary<string, string> postData, Dictionary<string, string> fileData, Encoding encoding, PostType postType, Dictionary<string, string> headDic)
{
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Ssl3;
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
}
string strBoundary = "----WebKitFormBoundary7MA4YWxkTrZu0gW";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = postType.ToString();
request.Accept = "*/*";
request.ContentType = "multipart/form-data;boundary=" + strBoundary;
request.Credentials = CredentialCache.DefaultCredentials;
//用户标识一定要加,不然有些严一点的网站会返回错误信息，比如说微信的，不按照规范来，很容易403
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; QQWubi 133; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; CIBA; InfoPath.2)";
request.ProtocolVersion = HttpVersion.Version10;
//添加请求头
if (headDic != null && headDic.Count > 0)
{
Dictionary<string, string>.Enumerator it = headDic.GetEnumerator();
while (it.MoveNext())
{
request.Headers.Add(it.Current.Key, it.Current.Value);
}
}
Stream myRequestStream = request.GetRequestStream();
//组成普通参数信息
foreach (KeyValuePair<string, string> item in postData)
{
StringBuilder strBPostContent = new StringBuilder();
strBPostContent.Append("--" + strBoundary + "\r\n");
strBPostContent.Append("Content-Disposition: form-data; name=\"" + item.Key + "\"\r\n");
strBPostContent.Append("\r\n" + item.Value + "\r\n");
byte[] byteArrPostContent = encoding.GetBytes(strBPostContent.ToString());
myRequestStream.Write(byteArrPostContent, 0, byteArrPostContent.Length);//写入参数
}
//处理文件参数信息
foreach (KeyValuePair<string, string> item in fileData)
{
string filename = Path.GetFileName(item.Value);//获取文件名
StringBuilder strBFileContent = new StringBuilder();
strBFileContent.Append("--" + strBoundary + "\r\n");
strBFileContent.Append("Content-Disposition:form-data; name=\"" + item.Key + "\";filename=\"" + filename + "\"" + "\r\n\r\n");
byte[] byteArrFileContent = encoding.GetBytes(strBFileContent.ToString());
myRequestStream.Write(byteArrFileContent, 0, byteArrFileContent.Length);//写入文件信息
//读取文件信息
FileStream fileStream = new FileStream(item.Value, FileMode.Open, FileAccess.Read, FileShare.Read);
byte[] bytes = new byte[fileStream.Length];
fileStream.Read(bytes, 0, bytes.Length);
fileStream.Close();
byte[] UpdateFile = bytes;//转换为二进制
if (UpdateFile.Length == 0)
{
return "file error";
}
myRequestStream.Write(UpdateFile, 0, UpdateFile.Length);//文件写入请求流中
}
//请求体末尾
byte[] byteArrContentEnd = encoding.GetBytes("\r\n--" + strBoundary + "--\r\n");
myRequestStream.Write(byteArrContentEnd, 0, byteArrContentEnd.Length);//写入结尾
myRequestStream.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
try
{
using (StreamReader reader = new StreamReader(response.GetResponseStream(), encoding))
{
return reader.ReadToEnd();
}
}
catch (WebException ex)
{
//这一步很有必要，因为有的地方会把错误信息放在异常里面，但是直接ex.message是看不到具体信息的，只有显示403拒绝访问
response = (HttpWebResponse)ex.Response;
using (StreamReader reader = new StreamReader(response.GetResponseStream(), encoding))
{
return reader.ReadToEnd();
}
}
finally
{
response.Close();
}
}
/// <summary>
/// 请求类型
/// </summary>
public enum PostType
{
POST,
GET
}
/// <summary>
/// HTTP 内容类型(Content-Type)
/// </summary>
public class HttpContentType
{
/// <summary>
/// 资源类型：普通文本
/// </summary>
public const string TEXT_PLAIN = "text/plain";
/// <summary>
/// 资源类型：JSON字符串
/// </summary>
public const string APPLICATION_JSON = "application/json";
/// <summary>
/// 资源类型：未知类型(数据流)
/// </summary>
public const string APPLICATION_OCTET_STREAM = "application/octet-stream";
/// <summary>
/// 资源类型：表单数据(键值对)
/// </summary>
public const string WWW_FORM_URLENCODED = "application/x-www-form-urlencoded";
/// <summary>
/// 资源类型：表单数据(键值对)。编码方式为 gb2312
/// </summary>
public const string WWW_FORM_URLENCODED_GB2312 = "application/x-www-form-urlencoded;charset=gb2312";
/// <summary>
/// 资源类型：表单数据(键值对)。编码方式为 utf-8
/// </summary>
public const string WWW_FORM_URLENCODED_UTF8 = "application/x-www-form-urlencoded;charset=utf-8";
/// <summary>
/// 资源类型：多分部数据
/// </summary>
public const string MULTIPART_FORM_DATA = "multipart/form-data";
}
private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
return true; //总是接受
}
}
