using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Net;
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using System.Text;
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namespace ImgRec
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{
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public class TTHttp
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{
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/// <summary>
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/// HTTP POST方式请求数据(带图片)
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/// </summary>
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/// <param name="url">URL</param>
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/// <param name="param">POST的数据</param>
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/// <param name="fileByte">图片Byte</param>
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/// <returns></returns>
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public static string Post(string url, IDictionary<object, object> param, byte[] fileByte)
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{
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string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
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byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
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HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
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wr.ContentType = "multipart/form-data; boundary=" + boundary;
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wr.UserAgent = "TT_C# 2.0";
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wr.Method = "POST";
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//wr.Timeout = 150000;
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//wr.KeepAlive = true;
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//wr.Credentials = System.Net.CredentialCache.DefaultCredentials;
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Stream rs = null;
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try
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{
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rs = wr.GetRequestStream();
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}
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catch { return "无法连接.请检查网络."; }
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string responseStr = null;
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string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
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foreach (string key in param.Keys)
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{
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rs.Write(boundarybytes, 0, boundarybytes.Length);
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string formitem = string.Format(formdataTemplate, key, param[key]);
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byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
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rs.Write(formitembytes, 0, formitembytes.Length);
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}
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rs.Write(boundarybytes, 0, boundarybytes.Length);
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string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
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string header = string.Format(headerTemplate, "image", "i.gif", "image/gif");//image/jpeg
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byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
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rs.Write(headerbytes, 0, headerbytes.Length);
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rs.Write(fileByte, 0, fileByte.Length);
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byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--");
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rs.Write(trailer, 0, trailer.Length);
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rs.Close();
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WebResponse wresp = null;
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try
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{
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wresp = wr.GetResponse();
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Stream stream2 = wresp.GetResponseStream();
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StreamReader reader2 = new StreamReader(stream2);
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responseStr = reader2.ReadToEnd();
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}
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catch
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{
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//throw;
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}
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finally
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{
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if (wresp != null)
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{
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wresp.Close();
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wresp = null;
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}
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wr.Abort();
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wr = null;
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}
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return responseStr;
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}
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public static string Post(string url, Dictionary<object, object> param)
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{
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HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
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request.Method = "POST";
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request.ContentType = "application/x-www-form-urlencoded";
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request.UserAgent = "TT_C# 2.0";
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//request.Timeout = 30000;
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#region POST方法
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//如果需要POST数据
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if (!(param == null || param.Count == 0))
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{
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StringBuilder buffer = new StringBuilder();
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int i = 0;
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foreach (string key in param.Keys)
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{
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if (i > 0)
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{
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buffer.AppendFormat("&{0}={1}", key, param[key]);
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}
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else
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{
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buffer.AppendFormat("{0}={1}", key, param[key]);
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}
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i++;
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}
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byte[] data = System.Text.Encoding.UTF8.GetBytes(buffer.ToString());
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try
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{
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using (Stream stream = request.GetRequestStream())
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{
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stream.Write(data, 0, data.Length);
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}
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}
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catch
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{
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return "无法连接.请检查网络.";
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}
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}
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#endregion
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WebResponse response = null;
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string responseStr = string.Empty;
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try
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{
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response = request.GetResponse();
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if (response != null)
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{
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StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
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responseStr = reader.ReadToEnd();
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reader.Close();
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}
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}
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catch (Exception)
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{
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//throw;
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}
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finally
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{
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request = null;
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response = null;
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}
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return responseStr;
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}
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}
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}
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