发送图片

Question

httpwatch获得出来的参数-----------------------------7db4e2920b3e
Content-Disposition: form-data; name="__VIEWSTATE"/wEPDwULLTEwMDQ2MjQ4MjcPZBYCAgMPFgIeB2VuY3R5cGUFE211bHRpcGFydC9mb3JtLWRhdGFkZA==
-----------------------------7db4e2920b3e
Content-Disposition: form-data; name="__EVENTVALIDATION"/wEWBQKp6aXABQL4kuGeCALt3oXMAwLm3PTRCALY4+lr
-----------------------------7db4e2920b3e
Content-Disposition: form-data; name="fuLoad"; filename="D:\eclipse3.1\eclipse3.1\workspace2\bjrjbrWeb\WebRoot\admin\upload\userUploadImage\1245723790453esf1.jpg"
Content-Type: image/pjpeg?
Content-Disposition: form-data; name="upfile"鐐瑰嚮涓婁紶鍥剧墖鎸夐挳锛屼笂浼犲浘鐗?
-----------------------------7db4e2920b3e
Content-Disposition: form-data; name="btnUpload"涓婁紶
-----------------------------7db4e2920b3e
Content-Disposition: form-data; name="hidShiNei"
-----------------------------7db4e2920b3e--只上传图片已经上传成功了，现在这个里面又添加了参数VIEWSTATE，EVENTVALIDATION，upfile等
发送图片也是在网上找的
String contenttype = "image/jpeg";
            string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
            try
            {
                HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uploadUrl);
                webrequest.ContentType = "multipart/form-data; boundary=" + boundary;
                webrequest.Method = "POST";
                StringBuilder sb = new StringBuilder();
                sb.Append("--"); 
                sb.Append(boundary);
                sb.Append("\r\n");
                sb.Append("Content-Disposition: form-data; name=\"");
                sb.Append(fileFormName);
                sb.Append("\"; filename=\"");
                sb.Append(Path.GetFileName(fileToUpload));
                sb.Append("\"");
                sb.Append("\r\n");
                sb.Append("Content-Type: ");
                sb.Append(contenttype);
                sb.Append("\r\n");
                sb.Append("\r\n");                //string postHeader = sb.ToString() + postDateAdd;
                //string postData = "";
                //if (postDateAdd != "")
                //{
                 //   StringBuilder post = new StringBuilder();
                 //   string[] array = postDateAdd.Split('&');
                 //   foreach (string str in array)
                 //   {
                 //       string[] arr = str.Split('=');
                 //       post.AppendFormat("{0}\r\nContent-Disposition: form-data; name=\"{1}\"\r\n\r\n{2}\r\n", boundary, arr[0], arr[1]);
                //    }
               //     post.AppendFormat("{0}--\r\n", boundary);
                //    postData = post.ToString();
               // }                string postHeader = sb.ToString();
                                byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);                //byte[] postDateAddBytes = encoding.GetBytes(postData);                byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");                FileStream fileStream = new FileStream(fileToUpload, FileMode.Open, FileAccess.Read);
                long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length + postDateAddBytes.Length;
                webrequest.ContentLength = length;
                webrequest.CookieContainer = cc;
                webrequest.AllowAutoRedirect = true;                webrequest.ServicePoint.ConnectionLimit = maxTry;
                webrequest.Referer = uploadUrl;
                webrequest.Accept = accept;
                webrequest.UserAgent = userAgent;                Stream requestStream = webrequest.GetRequestStream();                //requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);                requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);                byte[] buffer = new Byte[(int)fileStream.Length];
                int bytesRead = 0;
                while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                    requestStream.Write(buffer, 0, bytesRead);                
                requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);                HttpWebResponse res = (HttpWebResponse)webrequest.GetResponse();                StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.UTF8);
                string html = sr.ReadToEnd();
                                requestStream.Close();
                return html;想知道VIEWSTATE，EVENTVALIDATION，upfile这些参数是怎么传上去的？

Answer 1

现在我是这样写的String contenttype = "image/jpeg";
            string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
            try
            {
                HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uploadUrl);
                webrequest.ContentType = "multipart/form-data; boundary=" + boundary;
                webrequest.Method = "POST";
                StringBuilder sb = new StringBuilder();
                sb.Append("--"); 
                sb.Append(boundary);
                sb.Append("\r\n");
                sb.Append("Content-Disposition: form-data; name=\"");
                sb.Append(fileFormName);
                sb.Append("\"; filename=\"");
                sb.Append(Path.GetFileName(fileToUpload));
                sb.Append("\"");
                sb.Append("\r\n");
                sb.Append("Content-Type: ");
                sb.Append(contenttype);
                sb.Append("\r\n");
                sb.Append("\r\n");                //string postHeader = sb.ToString() + postDateAdd;
                string postData = "";
                if (postDateAdd != "")
                {
                    StringBuilder post = new StringBuilder();
                    string[] array = postDateAdd.Split('&');
                    foreach (string str in array)
                    {
                        string[] arr = str.Split('=');
                        post.AppendFormat("{0}\r\nContent-Disposition: form-data; name=\"{1}\"\r\n\r\n{2}\r\n", boundary, arr[0], arr[1]);
                    }
                    post.AppendFormat("{0}--\r\n", boundary);
                    postData = post.ToString();
                }                string postHeader = sb.ToString();                byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);                byte[] postDateAddBytes = Encoding.ASCII.GetBytes(postData);                //byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
                FileStream fileStream = new FileStream(fileToUpload, FileMode.Open, FileAccess.Read);
                //long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length + postDateAddBytes.Length;
                long length = postHeaderBytes.Length + fileStream.Length + postDateAddBytes.Length;
                webrequest.ContentLength = length;
                webrequest.CookieContainer = cc;
                webrequest.AllowAutoRedirect = true;                webrequest.ServicePoint.ConnectionLimit = maxTry;
                webrequest.Referer = uploadUrl;
                webrequest.Accept = accept;
                webrequest.UserAgent = userAgent;                Stream requestStream = webrequest.GetRequestStream();                                requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);                byte[] buffer = new Byte[(int)fileStream.Length];
                int bytesRead = 0;
                while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                    requestStream.Write(buffer, 0, bytesRead);                //requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);                requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);                HttpWebResponse res = (HttpWebResponse)webrequest.GetResponse();                StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.UTF8);
                string html = sr.ReadToEnd();
                                requestStream.Close();
                return html;

Answer 2

这个发送图片
requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);                byte[] buffer = new Byte[(int)fileStream.Length];
                
                int bytesRead = 0;
                while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                    requestStream.Write(buffer, 0, bytesRead);requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);发送剩下的字段可以这样写吗？我调试获得出来的，跟截取的一样的，可是就是上传不上去

Answer 3

这是我的发图的部分代码，不完整，仅供参考：            string[] props = new string[] { "subject", "message", "formhash"};//, "fid" ,"posteditor_mediatyperadio","wysiwyg","previewbutton"};
            string[] values = new string[] { bt, ct, p.formhash};//, p.typeid, "on", "1", "预览帖子" };
            //发送每个字段
            sb.Length = 0;
            for (int j = 0; j < props.Length; j++)
            {
                sb.Append("--" + boundary + "\r\nContent-Disposition: form-data; name=\"" + props[j] + "\"\r\n\r\n" + values[j] + "\r\n");
            }
            sb.Append("--" + boundary + "--\r\n");
            byteArray = Encoding.Default.GetBytes(sb.ToString());
            dl.Add(byteArray);
            byteArray = null;
            sb = null;            MemoryStream mss = new MemoryStream();
            for (int j = 0; j < dl.Count; ++j)
            {
                mss.Write(dl[j], 0, dl[j].Length);
            }
            dl.Clear();
            byteArray = mss.ToArray();
            mss.Close();

Answer 4

        private bool AddPicture(byte[] fileDate)
        {
            if (fileDate == null) return false;
            if (xh < 20)
            {
                ++xh;                StringBuilder sb = new StringBuilder();
                sb.Append("--" + boundary + "\r\n");
                sb.Append("Content-Disposition: form-data; name=\"attach[]\"; filename=\"" + xh + ".jpg\"\r\n");
                sb.Append("Content-Type: image/*\r\n\r\n");
                byte[] byteArray = Encoding.Default.GetBytes(sb.ToString());
                dl.Add(byteArray);
                dl.Add(fileDate);
                sb.Length = 0;
                sb.Append("\r\n");
                sb.Append("--" + boundary + "\r\nContent-Disposition: form-data; name=\"localid[]\"\r\n\r\n" + xh + "\r\n");
                sb.Append("--" + boundary + "\r\nContent-Disposition: form-data; name=\"attachperm[]\"\r\n\r\n0\r\n");
                sb.Append("--" + boundary + "\r\nContent-Disposition: form-data; name=\"attachprice[]\"\r\n\r\n0\r\n");
                sb.Append("--" + boundary + "\r\nContent-Disposition: form-data; name=\"attachdesc[]\"\r\n\r\n\r\n");
                byteArray = Encoding.Default.GetBytes(sb.ToString());
                dl.Add(byteArray);
                return true;
            }
            else
            {
                if (textPics == null) textPics = new Queue<byte[]>();
                textPics.Enqueue(fileDate);
                return true;
            }
        }        private bool AddPicture(List<byte[]> DateList)
        {
            if (DateList == null) return false;
            foreach (byte[] fileDate in DateList)
            {
                AddPicture(fileDate);
            }
            return true;
        }

Answer 5

Stream requestStream = webrequest.GetRequestStream();
requestStream.Write(buffer, 0, bytesRead);
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);我想知道可以把那些参数跟图片在一块儿，一个stream里面全都写进去吗？

Answer 6

若上传图片，表单的编码类型必须是 multipart/form-data，需要将所有表单字段的数据（包括图片）构造成一个二进制文件，将其Post上去。下面是个例子，为不显示乱码，上传的是文本文件。你需要自己构造这样的文件。
上传文件的操作界面
<html>
<head>
<meta http-equiv="Content-Language" content="zh-cn">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>姓名</title>
</head>
<body>
<form method="POST" enctype="multipart/form-data" action="ff.asp">
　　<p>姓名：<input type="text" name="xm" size="20"></p>
　　<p>简历：<textarea rows="2" name="jl" cols="20"></textarea></p>
　　<p>已婚：<input type="checkbox" name="hy" value="Yes" checked></p>
　　<p>性别：<input type="radio" value="nan" checked name="sex">男 
　　<input type="radio" name="sex" value="nv">女</p>
　　<p>文件1：<input type="file" name="File1" size="30"></p>
　　<p>文件2：<input type="file" name="File2" size="30"></p>
　　<p><input type="submit" value="提交" name="B1"><input type="reset" value="重置" name="B2"></p>
</form>
</body>
</html>提交表单时的处理程序 ff.asp
<%
Function bin2str(binstr) 
　　Dim oUpFileStream
　　Set oUpFileStream = Server.CreateObject("ADODB.Stream")
　　oUpFileStream.Type = 1　　'二进制格式
　　oUpFileStream.Open 
　　oUpFileStream.Write binstr
　　oUpFileStream.Position=0　　
　　oUpFileStream.Type = 2　　'文本格式
　　oUpFileStream.CharSet = "GB2312"
　　bin2str=oUpFileStream.ReadText
　　oUpFileStream.close
　　Set oUpFileStream = nothing
End Function dim s,d
s=request.totalbytes　　 '总字节数
d= request.binaryread(s) '读取数据
response.write replace(bin2str(d),vbcrlf,"<br>")
%>上传的数据输入
下面是处理程序的显示结果
-----------------------------7d6399db02a2
Content-Disposition: form-data; name="xm"廉东方
-----------------------------7d6399db02a2
Content-Disposition: form-data; name="jl"男，民族：汗
信息工程系高级讲师
-----------------------------7d6399db02a2
Content-Disposition: form-data; name="hy"Yes
-----------------------------7d6399db02a2
Content-Disposition: form-data; name="sex"nan
-----------------------------7d6399db02a2
Content-Disposition: form-data; name="File1"; filename="E:\Internet\桌面\book.txt"
Content-Type: text/plain00001 Visual Basic .NET编程指南 (美)Harold 北京 电子工业出版社 2003.1
00010 C#编程思想与实践 张青,郭亚萍 北京 冶金工业出版社 2002.10
00008 中文Photoshop 7.0原创风暴 肖金秀 北京 冶金工业出版社 2003.8
-----------------------------7d6399db02a2
Content-Disposition: form-data; name="File2"; filename="E:\Internet\桌面\图片.jpg"
Content-Type: text/plain虽然扩展名是.jpg，但仍然是文本文件。
-----------------------------7d6399db02a2
Content-Disposition: form-data; name="B1"提交
-----------------------------7d6399db02a2--Ldf 2006-10-8 17:41:37 1【第1楼】可以看出:
1、各数据项之间的分隔符是：
　 -----------------------------7d6399db02a2
2、分隔符是变化的，每次都不一样
3、分隔符单独占一行
4、数据（兰色部分）是以两个回车换行引出
5、所有数据以二进制格式上传

Answer 7

就像你上面那个xm，jl，hy，
怎么和图片一起上传上去呢？

Answer 8

我这个写法对不对呢？
Stream requestStream = webrequest.GetRequestStream();
requestStream.Write(buffer, 0, bytesRead);
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);

Answer 9

这是我上传的过程
先写入图片的头
-----------------------------8cdd92a8598c646
Content-Disposition: form-data; name="file"; filename="20110422021915234.jpg"
Content-Type: image/pjpeg
requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
再写入图片
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
                    requestStream.Write(buffer, 0, bytesRead);
再传入
传入参数
if (postDateAdd != "")
                    requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);参数格式
-----------------------------8cdd92c09f2f014
Content-Disposition: form-data; name="ct"text/html
-----------------------------8cdd92c09f2f014
Content-Disposition: form-data; name="rt"http://my.anjuke.com/v2/ajax/uploadcallback/
-----------------------------8cdd92c09f2f014
Content-Disposition: form-data; name="comment"{"copyright":"anjuke","name":"楂樻湅鍧","brokerid":"516637"}
---------------------------8cdd92c09f2f014
最后是一个结束的
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
格式-----------------------------8cdd92c09f2f014--

Answer 10

        // 读取网络资源，返回字节数组
        public static byte[] getBytes(string url, CookieContainer cookie, byte[] postData, string contentType)
        {
            try
            {
                int c = url.IndexOf("/", 10);
                byte[] data = null;
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Timeout = timeOut;
                request.AllowAutoRedirect = true;
                if (cookie != null) request.CookieContainer = cookie;
                request.Referer = (c > 0 ? url.Substring(0, c) : url);
                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
                request.Headers[HttpRequestHeader.AcceptEncoding] = "gzip, deflate";                if (postData != null)                                           // 需要 Post 数据
                {
                    request.Method = "POST";
                    if (contentType == null) contentType = "application/x-www-form-urlencoded";
                    request.ContentType = contentType;
                    request.ContentLength = postData.Length;
                    Stream requestStream = request.GetRequestStream();
                    requestStream.Write(postData, 0, postData.Length);
                    requestStream.Close();
                }                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                //cookies= response.Cookies;
                //wc=response.Headers;
                string ce = response.Headers[HttpResponseHeader.ContentEncoding];
                int ContentLength = (int)response.ContentLength;
                Stream s = response.GetResponseStream();
                c = 1024 * 10;
                if (ContentLength < 0)                                          // 不能获取数据的长度
                {
                    data = new byte[c];
                    MemoryStream ms = new MemoryStream();
                    int l = s.Read(data, 0, c);
                    while (l > 0)
                    {
                        ms.Write(data, 0, l);
                        l = s.Read(data, 0, c);
                    }
                    data = ms.ToArray();
                    ms.Close();
                }
                else                                                            // 数据长度已知
                {
                    data = new byte[ContentLength];
                    int pos = 0;
                    while (ContentLength > 0)
                    {
                        int l = s.Read(data, pos, ContentLength);
                        pos += l;
                        ContentLength -= l;
                    }
                }
                s.Close();
                response.Close();                if (ce == "gzip")                                               // 若数据是压缩格式，则要进行解压
                {
                    unRar(ref data);
                }
                return data;                                                    // 返回字节数组
            }
            catch
            {
                return new byte[0];
            }
        }        private static byte[] unRar(ref  byte[] data)     // 解压数据
        {
            try
            {
                MemoryStream js = new MemoryStream();                       // 解压后的流   
                MemoryStream ms = new MemoryStream(data);                   // 用于解压的流   
                GZipStream g = new GZipStream(ms, CompressionMode.Decompress);
                byte[] buffer = new byte[10240];                                // 读数据缓冲区      
                int l = g.Read(buffer, 0, 10240);                               // 一次读 10K      
                while (l > 0)
                {
                    js.Write(buffer, 0, l);
                    l = g.Read(buffer, 0, 10240);
                }
                g.Close();
                ms.Close();
                data = js.ToArray();
                js.Close();
                return data;
            }
            catch
            {
                return data;
            }
        }        private byte[] Rar(ref byte[] data)     // 压缩数据
        {
            MemoryStream ys = new MemoryStream();                       // 压缩后的流   
            GZipStream g = new GZipStream(ys, CompressionMode.Compress);
            g.Write(data, 0, data.Length);
            g.Close();
            data=ys.ToArray();
            ys.Close();
            return data;
        }

Answer 11

写了之后要close（）
                if (postData != null)                                           // 需要 Post 数据
                {
                    request.Method = "POST";
                    if (contentType == null) contentType = "application/x-www-form-urlencoded";
                    request.ContentType = contentType;
                    request.ContentLength = postData.Length;
                    Stream requestStream = request.GetRequestStream();
                    requestStream.Write(postData, 0, postData.Length);
                    requestStream.Close();                }

Answer 12

改变红色一行的位置试试：               requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);                HttpWebResponse res = (HttpWebResponse)webrequest.GetResponse();
                requestStream.Close();
                StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.UTF8);
                string html = sr.ReadToEnd();
                                return html;

Answer 13

requestStream.Write(postDateAddBytes, 0, postDateAddBytes.Length);
requestStream.Close();
  HttpWebResponse res = (HttpWebResponse)webrequest.GetResponse();
  StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.UTF8);
  string html = sr.ReadToEnd();
      return html;