using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows.Forms;

namespace UploadImageFile
{
    public partial class Form1 : Form
    {
        #region 全局变量
        HttpHelper Http = new HttpHelper();
        HttpItem item = null;
        HttpResult result = null;
        #endregion

        public Form1()
        {
            InitializeComponent();
        }

        private void but_Upload_Click(object sender, EventArgs e)
        {
            #region 变量
            byte[] UploadBuffers = null;
            string BoundStr = "-----------------------------7de1b519306dc";//根据抓包生成
            StringBuilder UploadBuf = new StringBuilder();
            #endregion

            #region 头部数据
            UploadBuf.Append(BoundStr + "\r\n");
            UploadBuf.Append(@"Content-Disposition: form-data; name=""file""; filename=""test.jpg""" + "\r\n");
            UploadBuf.Append("Content-Type: image/jpeg\r\n\r\n");
            byte[] HeadBytes = Encoding.ASCII.GetBytes(UploadBuf.ToString());
            #endregion

            #region 图片数据
            byte[] PicBytes = ImageToBytesFromFilePath(@"D:\test.jpg");
            #endregion

            #region 尾部数据
            UploadBuf.Clear();
            UploadBuf.Append("\r\n" + BoundStr + "\r\n");
            UploadBuf.Append(@"Content-Disposition: form-data; name=""id""" + "\r\n\r\n\r\n");
            UploadBuf.Append(BoundStr + "\r\n" + @"Content-Disposition: form-data; name=""proxyurl""" + "\r\n\r\n\r\n");
            UploadBuf.Append(BoundStr + "\r\n" + @"Content-Disposition: form-data; name=""jsmode""" + "\r\n\r\ntrue\r\n");
            UploadBuf.Append(BoundStr + "\r\n" + @"Content-Disposition: form-data; name=""rule""" + "\r\n\r\nproductImageRule\r\n");
            UploadBuf.Append(BoundStr + "--");
            byte[] TailBytes = Encoding.ASCII.GetBytes(UploadBuf.ToString());
            #endregion

            #region 数组拼接
            UploadBuffers = ComposeArrays(HeadBytes, PicBytes);
            UploadBuffers = ComposeArrays(UploadBuffers, TailBytes);
            #endregion

            #region 上传
            item = new HttpItem()
            {
                URL = "http://upload.alibaba.com/fileupload",
                Method = "POST",
                ContentType = "multipart/form-data; boundary=" + BoundStr.Substring(2),
                Referer = "http://upload.alibaba.com/fileupload.html",
                PostDataType = PostDataType.Byte,
                PostEncoding = Encoding.UTF8,
                PostdataByte = UploadBuffers
            };
            result = Http.GetHtml(item);
            MessageBox.Show(result.Html);
            #endregion
        }

        #region 数组组合
        public static byte[] ComposeArrays(byte[] Array1, byte[] Array2)
        {
            byte[] Temp = new byte[Array1.Length + Array2.Length];
            Array1.CopyTo(Temp, 0);
            Array2.CopyTo(Temp, Array1.Length);
            return Temp;
        }
        #endregion

        #region 图片转Byte数组
        private byte[] ImageToBytesFromFilePath(string FilePath)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                using (Image Img = Image.FromFile(FilePath))
                {
                    using (Bitmap Bmp = new Bitmap(Img))
                    {
                        Bmp.Save(ms, Img.RawFormat);
                    }
                }
                return ms.ToArray();
            }
        }
        #endregion
    }
}