/// <summary>
/// Saves a message attachment to the attachment repository.
/// </summary>
/// <param name="attachment">The attachment to save.</param>
/// <param name="data">The attachment data to save.</param>
/// <returns>true if the attachment was attached successfully; otherise, false.</returns>
/// <exception cref="ArgumentNullException"><paramref name="data"/> is null.</exception>
public bool Save(CmoAttachment attachment, byte[] data)
{
return(Save(attachment, new WriteAttachmentEventHandler(delegate(string path)
{
/* due to Microsoft Connect bug #486256, we have to upload in chunks smaller than 64MB
* (http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=486256
*/
if (data == null)
{
throw new ArgumentNullException("data", "Attachment data cannot be null.");
}
using (FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None))
{
int offset = 0;
int count = 33554432; // 32MB chunks
int remaining = data.Length;
while (remaining > 0)
{
count = Math.Min(count, remaining);
fs.Write(data, offset, count);
offset += count;
remaining -= count;
}
}
})));
}
/// <summary>
/// Deletes a message attachment.
/// </summary>
/// <param name="attachment">The attachment to delete.</param>
/// <returns>true if the attachment was removed successfully; otherwise, false.</returns>
/// <exception cref="ArgumentException"><paramref name="attachment"/> has an invalid name.</exception>
/// <exception cref="ArgumentNullException"><paramref name="attachment"/> is null or has a null file name.</exception>
/// <exception cref="DirectoryNotFoundException">The attachment file path is invalid.</exception>
/// <exception cref="IOException">An I/O error occurred while opening the file.</exception>
/// <exception cref="NotSupportedException">The attachment file path is in an invalid format.</exception>
/// <exception cref="PathTooLongException">The path to the attachment exceeds the system-defined maximum length.</exception>
/// <exception cref="UnauthorizedAccessException">The attachment path specifies a read-only file or directory, or the operation is not supported on the current platform, or the caller does not have the required permission.</exception>
public bool Delete(CmoAttachment attachment)
{
if (attachment != null)
{
string path = this.GetPath(attachment);
if (File.Exists(path))
{
try
{
// unmark as read-only
FileAttributes attributes = File.GetAttributes(path);
if ((attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
{
File.SetAttributes(path, attributes & ~FileAttributes.ReadOnly);
}
File.Delete(path);
return(true);
}
catch
{
}
}
}
return(false);
}
/// <summary>
/// Retrieves the full system file path to a file attachment.
/// </summary>
/// <param name="attachment">The attachment to find.</param>
/// <returns>The full system file path to the attachment.</returns>
/// <exception cref="ArgumentNullException"><paramref name="attachment"/> is null.</exception>
internal string GetPath(CmoAttachment attachment)
{
if (attachment == null)
{
throw new ArgumentNullException("attachment", "The attachment cannot be null.");
}
return(string.Format("{0}\\{1}_{2}", GetMessageFolderName(attachment.CandidateID, attachment.MessageID), attachment.ID, attachment.FileName));
}
/// <summary>
/// Saves a message attachment to the attachment repository.
/// </summary>
/// <param name="attachment">The attachment to save.</param>
/// <param name="writeAttachment">The delegate method to use for writing the attachment to disk.</param>
/// <returns>true if the attachment was attached successfully; otherise, false.</returns>
/// <exception cref="ArgumentException"><paramref name="attachment"/> has an invalid name.</exception>
/// <exception cref="ArgumentNullException"><paramref name="attachment"/> is null or has a null file name, or <paramref name="writeAttachment"/> is not defined.</exception>
/// <exception cref="DirectoryNotFoundException">The attachment file path is invalid.</exception>
/// <exception cref="FileNotFoundException">The attachment file was not found.</exception>
/// <exception cref="IOException">An I/O error occurred while opening the file.</exception>
/// <exception cref="NotSupportedException">The attachment file path is in an invalid format.</exception>
/// <exception cref="PathTooLongException">The path to the attachment exceeds the system-defined maximum length.</exception>
/// <exception cref="SecurityException">The caller does not have the required permission.</exception>
/// <exception cref="UnauthorizedAccessException">The attachment path specifies a read-only file or directory, or the operation is not supported on the current platform, or the caller does not have the required permission.</exception>
private bool Save(CmoAttachment attachment, WriteAttachmentEventHandler writeAttachment)
{
if (attachment == null || writeAttachment == null)
{
return(false);
}
string path = GetPath(attachment);
if (File.Exists(path))
{
return(false);
}
string folder = new FileInfo(path).DirectoryName;
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
writeAttachment(path);
File.SetAttributes(path, File.GetAttributes(path) & FileAttributes.ReadOnly);
return(true);
}
/// <summary>
/// Retrieves a message attachment as a stream sequence of raw bytes.
/// </summary>
/// <param name="attachment">The attachment to get.</param>
/// <returns>A <see cref="Stream"/> object representing the raw attachment data.</returns>
/// <exception cref="ArgumentException"><paramref name="attachment"/> has an invalid name.</exception>
/// <exception cref="ArgumentNullException"><paramref name="attachment"/> is null or has a null file name.</exception>
/// <exception cref="DirectoryNotFoundException">The attachment file path is invalid.</exception>
/// <exception cref="FileNotFoundException">The attachment file was not found.</exception>
/// <exception cref="NotSupportedException">The attachment file path is in an invalid format.</exception>
/// <exception cref="PathTooLongException">The path to the attachment exceeds the system-defined maximum length.</exception>
/// <exception cref="UnauthorizedAccessException">The attachment path specifies a directory, or the caller does not have the required permission.</exception>
internal Stream GetData(CmoAttachment attachment)
{
return(File.OpenRead(GetPath(attachment)));
}
/// <summary>
/// Saves a message attachment to the attachment repository.
/// </summary>
/// <param name="attachment">The attachment to save.</param>
/// <param name="contents">The attachment data to save.</param>
/// <returns>true if the attachment was attached successfully; otherise, false.</returns>
/// <exception cref="ArgumentException"><paramref name="attachment"/> has an invalid name.</exception>
/// <exception cref="ArgumentNullException"><paramref name="attachment"/> is null or has a null file name.</exception>
/// <exception cref="DirectoryNotFoundException">The attachment file path is invalid.</exception>
/// <exception cref="FileNotFoundException">The attachment file was not found.</exception>
/// <exception cref="IOException">An I/O error occurred while opening the file.</exception>
/// <exception cref="NotSupportedException">The attachment file path is in an invalid format.</exception>
/// <exception cref="PathTooLongException">The path to the attachment exceeds the system-defined maximum length.</exception>
/// <exception cref="SecurityException">The caller does not have the required permission.</exception>
/// <exception cref="UnauthorizedAccessException">The attachment path specifies a read-only file or directory, or the operation is not supported on the current platform, or the caller does not have the required permission.</exception>
public bool Save(CmoAttachment attachment, string contents)
{
return(Save(attachment, new WriteAttachmentEventHandler(delegate(string path) { File.WriteAllText(path, contents); })));
}
