/// <summary>
/// Post image
/// </summary>
/// <param name="url"></param>
/// <param name="data"></param>
/// <param name="imgRaw"></param>
public void PostImage(
string url,
Dictionary<string, object> data,
WebPostImageObject media)
{
byte[] postData = BuildImagePostData(data, media);
try
{
Request = HttpWebRequest.Create(url) as HttpWebRequest;
Request.ContentType =
string.Concat("multipart/form-data; boundary=",
BOUNDARY);
Request.Method = "POST";
Request.BeginGetRequestStream(
(asyncResult) => OnGetRequestStreamCallback(asyncResult, postData),
Request);
}
catch (System.Exception e)
{
FirePostFailedEvent(e);
CleanUp();
}
}
/// <summary>
/// Build Post data
/// </summary>
/// <param name="data"></param>
/// <param name="imgRaw"></param>
/// <returns></returns>
internal byte[] BuildImagePostData(
Dictionary<string, object> data,
WebPostImageObject media)
{
var sb = new StringBuilder();
foreach (var kv in data)
{
sb.Append(PREFIX).Append(BOUNDARY).Append(NEWLINE);
sb.Append("Content-Disposition: form-data; name=\"").Append(kv.Key).Append("\"").Append(NEWLINE);
sb.Append(NEWLINE);
sb.Append(kv.Value);
sb.Append(NEWLINE);
}
sb.Append(PREFIX).Append(BOUNDARY).Append(NEWLINE);
if (string.IsNullOrEmpty(media.FieldName))
sb.Append("Content-Disposition: form-data; filename=\"").Append(media.FileName).Append("\"").Append(NEWLINE);
else
sb.Append("Content-Disposition: form-data; name=\"").Append(media.FieldName).Append("\";filename=\"").Append(media.FileName).Append("\"").Append(NEWLINE);
sb.Append("Content-Type: ").Append(media.ContentType).Append(NEWLINE);
sb.Append(NEWLINE);
var lastPart = string.Concat(NEWLINE, PREFIX, BOUNDARY, PREFIX, NEWLINE);
byte[] headerBytes = Encoding.UTF8.GetBytes(sb.ToString());
byte[] fileData = media.FileData;
byte[] lastBytes = Encoding.UTF8.GetBytes(lastPart.ToString());
var postData =
new byte[headerBytes.Length + fileData.Length + lastBytes.Length];
Buffer.BlockCopy(headerBytes, 0, postData, 0, headerBytes.Length);
Buffer.BlockCopy(fileData, 0, postData, headerBytes.Length, fileData.Length);
Buffer.BlockCopy(lastBytes, 0, postData, headerBytes.Length + fileData.Length, lastBytes.Length);
return postData;
}
