Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / Mail / Attachment.cs / 1 / Attachment.cs
using System; using System.IO; using System.Net.Mime; using System.Text; using System.Runtime.Versioning; namespace System.Net.Mail { public abstract class AttachmentBase : IDisposable { internal bool disposed = false; MimePart part = new MimePart(); internal AttachmentBase(){ } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] protected AttachmentBase(string fileName) { SetContentFromFile(fileName, String.Empty); } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] protected AttachmentBase(string fileName, string mediaType) { SetContentFromFile(fileName, mediaType); } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] protected AttachmentBase(string fileName, ContentType contentType) { SetContentFromFile(fileName, contentType); } protected AttachmentBase(Stream contentStream) { part.SetContent(contentStream); } protected AttachmentBase(Stream contentStream, string mediaType) { part.SetContent(contentStream, null, mediaType); } internal AttachmentBase(Stream contentStream, string name, string mediaType) { part.SetContent(contentStream, name, mediaType); } protected AttachmentBase(Stream contentStream, ContentType contentType) { part.SetContent(contentStream, contentType); } public void Dispose() { Dispose(true); } protected virtual void Dispose(bool disposing) { if (disposing && !disposed) { disposed = true; part.Dispose(); } } internal static string ShortNameFromFile(string fileName) { string name; int start = fileName.LastIndexOfAny(new char[] { '\\', ':' }, fileName.Length - 1, fileName.Length); if (start > 0) { name = fileName.Substring(start + 1, fileName.Length - start - 1); } else { name = fileName; } return name; } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] internal void SetContentFromFile(string fileName, ContentType contentType) { if (fileName == null) { throw new ArgumentNullException("fileName"); } if (fileName == String.Empty) { throw new ArgumentException(SR.GetString(SR.net_emptystringcall,"fileName"), "fileName"); } Stream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); part.SetContent(stream, contentType); } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] internal void SetContentFromFile(string fileName, string mediaType) { if (fileName == null) { throw new ArgumentNullException("fileName"); } if (fileName == String.Empty) { throw new ArgumentException(SR.GetString(SR.net_emptystringcall,"fileName"), "fileName"); } Stream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); part.SetContent(stream,null,mediaType); } internal void SetContentFromString(string contentString, ContentType contentType) { if (contentString == null) { throw new ArgumentNullException("content"); } if (part.Stream != null) { part.Stream.Close(); } Encoding encoding; if (contentType != null && contentType.CharSet != null) { encoding = Text.Encoding.GetEncoding(contentType.CharSet); } else{ if (MimeBasePart.IsAscii(contentString,false)) { encoding = Text.Encoding.ASCII; } else { encoding = Text.Encoding.GetEncoding(MimeBasePart.defaultCharSet); } } byte[] buffer = encoding.GetBytes(contentString); part.SetContent(new MemoryStream(buffer),contentType); if (MimeBasePart.ShouldUseBase64Encoding(encoding)){ part.TransferEncoding = TransferEncoding.Base64; } else{ part.TransferEncoding = TransferEncoding.QuotedPrintable; } } internal void SetContentFromString(string contentString, Encoding encoding, string mediaType) { if (contentString == null) { throw new ArgumentNullException("content"); } if (part.Stream != null) { part.Stream.Close(); } if (mediaType == null || mediaType == string.Empty) { mediaType = MediaTypeNames.Text.Plain; } //validate the mediaType int offset = 0; try{ string value = MailBnfHelper.ReadToken(mediaType, ref offset, null); if (value.Length == 0 || offset >= mediaType.Length || mediaType[offset++] != '/') throw new ArgumentException(SR.GetString(SR.MediaTypeInvalid), "mediaType"); value = MailBnfHelper.ReadToken(mediaType, ref offset, null); if(value.Length == 0 || offset < mediaType.Length){ throw new ArgumentException(SR.GetString(SR.MediaTypeInvalid), "mediaType"); } } catch(FormatException){ throw new ArgumentException(SR.GetString(SR.MediaTypeInvalid), "mediaType"); } ContentType contentType = new ContentType(mediaType); if (encoding == null){ if (MimeBasePart.IsAscii(contentString,false)) { encoding = Text.Encoding.ASCII; } else { encoding = Text.Encoding.GetEncoding(MimeBasePart.defaultCharSet); } } contentType.CharSet = encoding.BodyName; byte[] buffer = encoding.GetBytes(contentString); part.SetContent(new MemoryStream(buffer),contentType); if (MimeBasePart.ShouldUseBase64Encoding(encoding)){ part.TransferEncoding = TransferEncoding.Base64; } else{ part.TransferEncoding = TransferEncoding.QuotedPrintable; } } internal virtual void PrepareForSending(){ part.ResetStream(); } public Stream ContentStream { get { if (disposed) { throw new ObjectDisposedException(this.GetType().FullName); } return part.Stream; } } public string ContentId { get { string cid = part.ContentID; if (string.IsNullOrEmpty(cid)) { cid = Guid.NewGuid().ToString(); ContentId = cid; return cid; } if (cid.Length >= 2 && cid[0] == '<' && cid[cid.Length - 1] == '>') { return cid.Substring(1, cid.Length - 2); } return cid; } set { if (string.IsNullOrEmpty(value)) { part.ContentID = null; } else { if(value.IndexOfAny(new char[] { '<', '>' }) != -1) { throw new ArgumentException(SR.GetString(SR.MailHeaderInvalidCID), "value"); } part.ContentID = "<" + value + ">"; } } } public ContentType ContentType { get { return part.ContentType; } set { part.ContentType = value; } } public TransferEncoding TransferEncoding { get { return part.TransferEncoding; } set { part.TransferEncoding = value; } } internal Uri ContentLocation { get { Uri uri; if (!Uri.TryCreate(part.ContentLocation, UriKind.RelativeOrAbsolute, out uri)) { return null; } return uri; } set { part.ContentLocation = value == null ? null : value.IsAbsoluteUri ? value.AbsoluteUri : value.OriginalString; } } internal MimePart MimePart { get { return part; } } } public class Attachment : AttachmentBase { string name; Encoding nameEncoding; internal Attachment(){ } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public Attachment(string fileName) :base(fileName) { Name = ShortNameFromFile(fileName); } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public Attachment(string fileName, string mediaType) : base(fileName, mediaType) { Name = ShortNameFromFile(fileName); } [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public Attachment(string fileName, ContentType contentType) : base(fileName, contentType) { if (contentType.Name == null || contentType.Name == String.Empty) { Name = ShortNameFromFile(fileName); } else{ Name = contentType.Name; } } public Attachment(Stream contentStream, string name) : base(contentStream, null, null) { Name = name; } public Attachment(Stream contentStream, string name, string mediaType) : base(contentStream, null, mediaType) { Name = name; } public Attachment(Stream contentStream, ContentType contentType) : base(contentStream, contentType) { Name = contentType.Name; } internal void SetContentTypeName(){ if (name != null && name.Length != 0 && !MimeBasePart.IsAscii(name,false)) { Encoding encoding = NameEncoding; if(encoding == null){ encoding = Encoding.GetEncoding(MimeBasePart.defaultCharSet); } MimePart.ContentType.Name = MimeBasePart.EncodeHeaderValue(name, encoding ,MimeBasePart.ShouldUseBase64Encoding(encoding)); } else{ MimePart.ContentType.Name = name; } } public string Name { get { return name; } set { Encoding nameEncoding = MimeBasePart.DecodeEncoding(value); if(nameEncoding != null){ this.nameEncoding = nameEncoding; this.name = MimeBasePart.DecodeHeaderValue(value); MimePart.ContentType.Name = value; } else{ this.name = value; SetContentTypeName(); } } } public Encoding NameEncoding { get { return nameEncoding; } set { nameEncoding = value; if(name != null && name != String.Empty){ SetContentTypeName(); } } } public ContentDisposition ContentDisposition { get { ContentDisposition disp = MimePart.ContentDisposition; if (disp == null) { disp = new ContentDisposition(); MimePart.ContentDisposition = disp; } return disp; } } internal override void PrepareForSending(){ if(name != null && name != String.Empty){ SetContentTypeName(); } base.PrepareForSending(); } public static Attachment CreateAttachmentFromString(string content, string name){ Attachment a = new Attachment(); a.SetContentFromString(content,null, String.Empty); a.Name = name; return a; } public static Attachment CreateAttachmentFromString(string content, string name, Encoding contentEncoding, string mediaType){ Attachment a = new Attachment(); a.SetContentFromString(content, contentEncoding, mediaType); a.Name = name; return a; } public static Attachment CreateAttachmentFromString(string content, ContentType contentType){ Attachment a = new Attachment(); a.SetContentFromString(content, contentType); a.Name = contentType.Name; return a; } } }
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