Upload billede fil vha. WebClient og POST

http://www.google.dk/search?hl=da&q=free-picture-upload&btnG=Google-s%C3%B8gning&meta=

hvordan ser din kode ud ?

Jeg lavede engang noget upload kode med HttpWebRequest til at uploade mere end
en fil ad gangen med:

using System;
using System.IO;
using System.Net;

public class FileUpload
{
    private const string BOUNDARY = "ArneArne";
    public static void Main(string[] args)
    {
        //upload("http://localhost/upload2.php", "C:\\z.c", "C:\\z.exe");
        upload("http://localhost/upload.php", "C:\\z.c", "C:\\z.exe");
    }
    public static void upload(string url, string textfile, string binfile)
    {
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
        req.Method = "POST";
        req.ContentType = "multipart/form-data, boundary=" + BOUNDARY;
        StreamWriter post = new StreamWriter(req.GetRequestStream());
        post.WriteLine("--" + BOUNDARY);
        //post.WriteLine("Content-disposition: attachment; name=\"filename[1]\"; filename=\"" + textfile + "\"");
        post.WriteLine("Content-disposition: attachment; name=\"textfile\"; filename=\"" + textfile + "\"");
        post.WriteLine("Content-type: text/plain");
        post.WriteLine("");
        StreamReader txtf = new StreamReader(new FileStream(textfile, FileMode.Open));
        string line;
        while((line = txtf.ReadLine()) != null)
        {
            post.WriteLine(line);
        }
        txtf.Close();
        post.WriteLine("--" + BOUNDARY);
        //post.WriteLine("Content-disposition: attachment; name=\"filename[2]\"; filename=\"" + binfile + "\"");
        post.WriteLine("Content-disposition: attachment; name=\"binfile\"; filename=\"" + binfile + "\"");
        post.WriteLine("Content-type: application/octet-stream");
        post.WriteLine("Content-Transfer-Encoding: binary");
        post.WriteLine("");
        post.Flush();
        Stream binf = new FileStream(binfile, FileMode.Open);
        int c;
        while((c = binf.ReadByte()) >= 0) {
            post.BaseStream.WriteByte((byte)c);
        }
        binf.Close();
        post.BaseStream.Flush();
        post.Close();
        HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
        Console.WriteLine(resp.StatusCode);
        resp.Close();
    }
}

den virkede fint med det PHP script

men jeg tror senere at jef fandt et par små rettelser da jeg skulle uploade til JSP

ah - her er den version:

using System;
using System.IO;
using System.Net;

public class DataAndFileUpload
{
    private const string BOUNDARY = "ArneArne";
    public static void Main(string[] args)
    {
        upload("http://localhost:8080/test/xuploaddo.jsp", "test", "C:\\last.cpp");
    }
    public static void upload(string url, string description, string filename)
    {
        ServicePointManager.Expect100Continue = false; // to avoid .NET - Tomcat 5 bug
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
        req.Method = "POST";
        req.KeepAlive = false;
        req.ContentType = "multipart/form-data; boundary=" + BOUNDARY;
        StreamWriter post = new StreamWriter(req.GetRequestStream());
        post.WriteLine("--" + BOUNDARY);
        post.WriteLine("Content-Disposition: form-data; name=\"beskrivelse\"");
        post.WriteLine("");
        post.WriteLine(description);
        post.WriteLine("--" + BOUNDARY);
        post.WriteLine("Content-Disposition: form-data; name=\"fil\"; filename=\"" + filename + "\"");
        //post.WriteLine("Content-Type: text/plain");
        post.WriteLine("Content-type: application/octet-stream");
        post.WriteLine("Content-Transfer-Encoding: binary");
        post.WriteLine("");
        post.Flush();
        Stream binf = new FileStream(filename, FileMode.Open);
        int c;
        while((c = binf.ReadByte()) >= 0) {
            post.BaseStream.WriteByte((byte)c);
        }
        binf.Close();
        post.BaseStream.Flush();
        post.WriteLine("--" + BOUNDARY + "--");
        post.Close();
        HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
        Console.WriteLine(resp.StatusCode);
        resp.Close();
    }
}

dette eksempel er så ikke 2 filer men en beskrivelse + en fil

hvad sker der? skulle han bruge et script til at uploade billeder, eller en side hvór han kunne uploade dem?!

jeg læser spørgsmålet som at at det er client kode til upload

(noget kode som uploader på samme måde som en browser)

Arne har ret det er formålet :)

men jeg havde mere forestillet mig noget i denne retning...
---------------------------
public static void Main(string[] args)
{
    WebClient wc = new WebClient();
    byte[] fileBytes = ReadWholeArray(File.OpenRead("C:\\abc.jpg"));
    byte[] result = wc.UploadData("http://imageshack.us//upload.php", "POST", fileBytes);

    ASCIIEncoding ase = new ASCIIEncoding();
    Console.WriteLine( ase.GetString(result));
}

public static byte[] ReadWholeArray(Stream stream)
{

    byte[] data = new byte[stream.Length];
    int offset = 0;
    int remaining = data.Length;
    while (remaining > 0)
    {
        int read = stream.Read(data, offset, remaining);
        if (read <= 0)
            throw new EndOfStreamException
                (String.Format("End of stream reached with {0} bytes left to read", remaining));
        remaining -= read;
        offset += read;
    }
    return data;
}

som i øvrigt ikke virker. Men hvad er det jeg gør galt, jeg har også prøvet at bruge webclient.uploadfile, det virker heller ikke??

din ReadWholeArra kan sagtens kombineres med min HttpWebRequest POST

Hvad bruges BOUNDARY til i dit eksempel. Skal man selv håndterer de forskellige felter i <FORM> delen fra ImageShack. Sådan her ser den, adressen er iøvrigt http://imageshack.us:

<form method="post" action="http://www.imageshack.us/" enctype="multipart/form-data" onsubmit="disableme('butan')" id="upform">
<table cellspacing="0" cellpadding="0" border="0"><tr>

<td><p style="font-size: 11px;">upload: <input type="radio" name="uploadtype" onclick="toggleuploadmode(true);" checked>
file <input type="radio" name="uploadtype" onclick="toggleuploadmode(false);"> url</p></td>


<td width="2">&nbsp;</td>

<td><div id="upfile"><input type="file" name="fileupload" size="30" onchange="showoptions(this)" id="fileupload"></div>
<div id="upurl" style="display: none"><input type="text" id="fileupload" value="paste image url here" style="color: #888;"
onfocus="focusfield(this)" name="url" size="30"></div></td>

</tr></table>


<input type="hidden" name="MAX_FILE_SIZE" value="3145728">
<input type="hidden" name="refer" value="">
<input type="hidden" name="brand" value="">

<div id="resizeoptions">
  <input type="checkbox" name="optimage" id="optimage" value="1"  onclick="optsize.disabled=!this.checked"> resize image?
  <select name="optsize" id="optsize">
    <option value="100x100" >100x75 (avatar)</option>
    <option value="150x150" >150x112 (thumbnail)</option>
    <option value="320x320" selected>320x240 (for websites and email)</option>
    <option value="640x640" >640x480 (for message boards)</option>
    <option value="800x800" >800x600 (15-inch monitor)</option>
    <option value="1024x1024" >1024x768 (17-inch monitor)</option>
    <option value="1280x1280" >1280x1024 (19-inch monitor)</option>
    <option value="1600x1600" >1600x1200 (21-inch monitor)</option>
    <option value="resample" >optimize without resizing</option>
  </select>
</div>
<div>
  <input type="checkbox" name="rembar" value="1" > remove size/resolution bar from thumbnail?
</div>

<div id="filetypeerror" style="display: none"> <b style="color: red;">Please select only one of the supported file types:</b><br></div>
<div><img class="para" src="img/hosty.png" alt="hosting" /></div>

<input id="butan" style="width:150px" type="submit" value="host it!">&nbsp;&nbsp;&nbsp;&nbsp;</form>

BOUNDARY adskiller form felter

OK ?