/// <summary>
///
/// </summary>
/// <param name="stream">Stream containing the content</param>
/// <param name="contentType">Content type (with any additional info like boundry). Content type is always supplied in lower case</param>
/// <param name="encoding">Stream enconding</param>
/// <returns>A http form, or null if content could not be parsed.</returns>
/// <exception cref="InvalidDataException">If contents in the stream is not valid input data.</exception>
/// <exception cref="ArgumentNullException">If any parameter is null</exception>
public HttpForm Decode(Stream stream, string contentType, Encoding encoding)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (string.IsNullOrEmpty(contentType))
throw new ArgumentNullException("contentType");
if (encoding == null)
throw new ArgumentNullException("encoding");
if (!CanParse(contentType))
throw new InvalidOperationException("Cannot parse contentType: " + contentType);
//multipart/form-data, boundary=AaB03x
int pos = contentType.IndexOf("=");
if (pos == -1)
throw new InvalidDataException("Missing boundry in content type.");
string boundry = contentType.Substring(pos + 1).Trim();
HttpMultipart multipart = new HttpMultipart(stream, boundry, encoding);
HttpForm form = new HttpForm();
HttpMultipart.Element element;
while ((element = multipart.ReadNextElement()) != null)
{
if (string.IsNullOrEmpty(element.Name))
throw new InvalidDataException("Error parsing request. Missing value name.\nElement: " + element);
if (!string.IsNullOrEmpty(element.Filename))
{
if (string.IsNullOrEmpty(element.ContentType))
throw new InvalidDataException("Error parsing request. Value '" + element.Name + "' lacks a content type.");
// Read the file data
byte[] buffer = new byte[element.Length];
stream.Seek(element.Start, SeekOrigin.Begin);
stream.Read(buffer, 0, (int) element.Length);
// Generate a filename
string filename = element.Filename;
string internetCache = Environment.GetFolderPath(Environment.SpecialFolder.InternetCache);
// if the internet path doesn't exist, assume mono and /var/tmp
string path = string.IsNullOrEmpty(internetCache)
? Path.Combine("var", "tmp")
: Path.Combine(internetCache.Replace("\\\\", "\\"), "tmp");
element.Filename = Path.Combine(path, Math.Abs(element.Filename.GetHashCode()) + ".tmp");
// If the file exists generate a new filename
while (File.Exists(element.Filename))
element.Filename = Path.Combine(path, Math.Abs(element.Filename.GetHashCode() + 1) + ".tmp");
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
File.WriteAllBytes(element.Filename, buffer);
form.AddFile(new HttpFile(element.Name, element.Filename, element.ContentType, filename));
}
else
{
byte[] buffer = new byte[element.Length];
stream.Seek(element.Start, SeekOrigin.Begin);
stream.Read(buffer, 0, (int) element.Length);
form.Add(element.Name, encoding.GetString(buffer));
}
}
return form;
}
/// <summary>
///
/// </summary>
/// <param name="stream">Stream containing the content</param>
/// <param name="contentType">Content type (with any additional info like boundry). Content type is always supplied in lower case</param>
/// <param name="encoding">Stream enconding</param>
/// <returns>A http form, or null if content could not be parsed.</returns>
/// <exception cref="InvalidDataException">If contents in the stream is not valid input data.</exception>
/// <exception cref="ArgumentNullException">If any parameter is null</exception>
public HttpForm Decode(Stream stream, string contentType, Encoding encoding)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (string.IsNullOrEmpty(contentType))
{
throw new ArgumentNullException("contentType");
}
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
if (!CanParse(contentType))
{
throw new InvalidOperationException("Cannot parse contentType: " + contentType);
}
//multipart/form-data, boundary=AaB03x
int pos = contentType.IndexOf("=");
if (pos == -1)
{
throw new InvalidDataException("Missing boundry in content type.");
}
string boundry = contentType.Substring(pos + 1).Trim();
HttpMultipart multipart = new HttpMultipart(stream, boundry, encoding);
HttpForm form = new HttpForm();
HttpMultipart.Element element;
while ((element = multipart.ReadNextElement()) != null)
{
if (string.IsNullOrEmpty(element.Name))
{
throw new InvalidDataException("Error parsing request. Missing value name.\nElement: " + element);
}
if (!string.IsNullOrEmpty(element.Filename))
{
if (string.IsNullOrEmpty(element.ContentType))
{
throw new InvalidDataException("Error parsing request. Value '" + element.Name + "' lacks a content type.");
}
// Read the file data
byte[] buffer = new byte[element.Length];
stream.Seek(element.Start, SeekOrigin.Begin);
stream.Read(buffer, 0, (int)element.Length);
// Generate a filename
string filename = element.Filename;
string internetCache = Environment.GetFolderPath(Environment.SpecialFolder.InternetCache);
// if the internet path doesn't exist, assume mono and /var/tmp
string path = string.IsNullOrEmpty(internetCache)
? Path.Combine("var", "tmp")
: Path.Combine(internetCache.Replace("\\\\", "\\"), "tmp");
element.Filename = Path.Combine(path, Math.Abs(element.Filename.GetHashCode()) + ".tmp");
// If the file exists generate a new filename
while (File.Exists(element.Filename))
{
element.Filename = Path.Combine(path, Math.Abs(element.Filename.GetHashCode() + 1) + ".tmp");
}
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
File.WriteAllBytes(element.Filename, buffer);
form.AddFile(new HttpFile(element.Name, element.Filename, element.ContentType, filename));
}
else
{
byte[] buffer = new byte[element.Length];
stream.Seek(element.Start, SeekOrigin.Begin);
stream.Read(buffer, 0, (int)element.Length);
form.Add(element.Name, encoding.GetString(buffer));
}
}
return(form);
}
