/// <summary>
/// post模拟表单提交(参数太长的时候用)
/// </summary>
/// <param name="url"></param>
/// <param name="cookie"></param>
/// <returns></returns>
public static String httpPost(String url, String postDataStr)
{
string result = "";
HttpWebRequest request = null;
HttpWebResponse response = null;
Stream stream = null;
StreamReader reader = null;
try
{
GC.Collect(); // 请求之前 做一次垃圾回收
ServicePointManager.DefaultConnectionLimit = 20;
// 打印 请求地址及参数
LogClass.WriteLog("请求数据：" + url);
request = (HttpWebRequest)WebRequest.Create(url);
byte[] requestBytes = Encoding.ASCII.GetBytes(postDataStr);
//request.Accept = "*/*";
request.Method = "POST";
//request.UserAgent = "Mozilla/5.0";
request.CookieContainer = CookieEntity.cookie;
request.KeepAlive = false; // 保持短链接
request.Timeout = 1 * 60 * 1000; // 1分钟，以防网络超时
request.ContentType = "application/x-www-form-urlencoded";
Encoding encoding = Encoding.UTF8; //根据网站的编码自定义
byte[] postData = encoding.GetBytes(postDataStr); //postDataStr即为发送的数据，
request.ContentLength = postData.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(postData, 0, postData.Length);
requestStream.Close();
response = (HttpWebResponse)request.GetResponse();
CookieEntity.cookie = request.CookieContainer;
stream = response.GetResponseStream();
reader = new StreamReader(stream, Encoding.UTF8);
result = reader.ReadToEnd().Trim();
// 打印响应结果
LogClass.WriteLog("响应结果：" + result);
//if (result.Equals("远程服务器返回错误: (404) 未找到。"))
//{
// throw new Exception(result);
//}
}
catch (Exception e)
{
result = "{'state': false, 'message':'" + e.Message + "'}";
LogClass.WriteExceptionLog(e);
}
finally
{
if (reader != null)
{
reader.Close();
}
if (stream != null)
{
stream.Close();
}
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return(result);
}
/// <summary>
/// 使用Post方法获取字符串结果
/// 主要用于文件上传(可携带表单数据)
/// </summary>
/// <param name="url">请求地址</param>
/// <param name="formItems">Post表单文件、内容数据</param>
/// <returns></returns>
public static string PostForm(string url, List <FormItemModel> formItems)
{
string result = "";
HttpWebRequest request = null;
HttpWebResponse response = null;
Stream stream = null;
StreamReader reader = null;
try
{
GC.Collect(); // 请求之前 做一次垃圾回收
ServicePointManager.DefaultConnectionLimit = 20;
// 打印 请求地址及参数
LogClass.WriteLog("请求数据：" + url);
request = WebRequest.Create(url) as HttpWebRequest;
#region 初始化请求对象
request.Accept = "*/*";
request.Method = "POST";
request.UserAgent = "Mozilla/5.0";
request.CookieContainer = CookieEntity.cookie;
request.KeepAlive = false; // 保持短链接
request.Timeout = 2 * 60 * 1000; // 2分钟，以防网络超时 或 文件过大
#endregion
string boundary = "----" + DateTime.Now.Ticks.ToString("x");//分隔符
request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
//请求流
var postStream = new MemoryStream();
#region 处理Form表单请求内容
//是否用Form上传文件
var formUploadFile = formItems != null && formItems.Count > 0;
if (formUploadFile)
{
//文件数据模板
string fileFormdataTemplate =
"\r\n--" + boundary +
"\r\nContent-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"" +
"\r\nContent-Type: multipart/form-data" +
"\r\n\r\n";
//文本数据模板
string dataFormdataTemplate =
"\r\n--" + boundary +
"\r\nContent-Disposition: form-data; name=\"{0}\"" +
"\r\n\r\n{1}";
foreach (var item in formItems)
{
string formdata = null;
if (item.IsFile)
{
//上传文件
formdata = string.Format(
fileFormdataTemplate,
item.Key, //表单键
item.FileName);
}
else
{
//上传文本
formdata = string.Format(
dataFormdataTemplate,
item.Key,
item.Value);
}
//统一处理
byte[] formdataBytes = null;
//第一行不需要换行
if (postStream.Length == 0)
{
formdataBytes = Encoding.UTF8.GetBytes(formdata.Substring(2, formdata.Length - 2));
}
else
{
formdataBytes = Encoding.UTF8.GetBytes(formdata);
}
postStream.Write(formdataBytes, 0, formdataBytes.Length);
//写入文件内容
if (item.FileContent != null && item.FileContent.Length > 0)
{
using (var streams = item.FileContent)
{
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = streams.Read(buffer, 0, buffer.Length)) != 0)
{
postStream.Write(buffer, 0, bytesRead);
}
}
}
}
//结尾
var footer = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
postStream.Write(footer, 0, footer.Length);
}
else
{
request.ContentType = "application/json;charset=UTF-8";
}
#endregion
request.ContentLength = postStream.Length;
#region 输入二进制流
if (postStream != null)
{
postStream.Position = 0;
//直接写入流
Stream requestStream = request.GetRequestStream();
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = postStream.Read(buffer, 0, buffer.Length)) != 0)
{
requestStream.Write(buffer, 0, bytesRead);
}
postStream.Close();//关闭文件访问
}
#endregion
response = (HttpWebResponse)request.GetResponse();
CookieEntity.cookie = request.CookieContainer;
stream = response.GetResponseStream();
reader = new StreamReader(stream, Encoding.UTF8);
result = reader.ReadToEnd().Trim();
// 打印响应结果
LogClass.WriteLog("响应结果：" + result);
}
catch (Exception e)
{
result = e.Message;
LogClass.WriteExceptionLog(e);
}
finally
{
if (reader != null)
{
reader.Close();
}
if (stream != null)
{
stream.Close();
}
if (response != null)
{
response.Close();
}
if (request != null)
{
request.Abort();
}
}
return(result);;
}