C# Stream.WriteTo方法代码示例

 public void Write(Stream stream)
 {
     using (var fs = File.OpenWrite())
     {
         stream.WriteTo(fs);
     }
 }

        XElement ToXml(Stream stream)
        {
            using (var output = new MemoryStream())
            {
                stream.WriteTo(output);
                output.Position = 0;

                var bytes = new byte[output.Length];
                output.Read(bytes, 0, bytes.Length);
                var xml = Ionic.Zlib.GZipStream.UncompressString(bytes);
                return XDocument.Parse(xml).Root;
            }
        }

		public override void Load(OpenedFile file, Stream stream)
		{
			if (file == PrimaryFile) {
				try {
					XmlDocument doc = new XmlDocument();
					doc.Load(stream);
					
					setDoc = new SettingsDocument(doc.DocumentElement, view);
					view.ShowEntries(setDoc.Entries);
				} catch (XmlException ex) {
					ShowLoadError(ex.Message);
				}
			} else if (file == appConfigFile) {
				appConfigStream = new MemoryStream();
				stream.WriteTo(appConfigStream);
			}
		}

        public string Save(Stream stream, string filename, string username)
        {
            string userFolder = Path.Combine(_root, username);
            if (!Directory.Exists(userFolder))
            {
                Directory.CreateDirectory(userFolder);
            }

            string storageFile = Path.Combine(userFolder, filename);
            if (File.Exists(storageFile))
            {
                File.Delete(storageFile);
            }

            using (Stream file = File.Create(storageFile))
            {
                stream.WriteTo(file);
            }

            return storageFile;
        }

        /// <summary>
        /// Implementation method for the WritePage methods.
        /// </summary>
        /// <param name="pageData">The page data.</param>
        /// <param name="startOffset">The start offset.</param> 
        /// <param name="sourceStreamPosition">The beginning position of the source stream prior to execution, negative if stream is unseekable.</param>
        /// <param name="options">An object that specifies any additional options for the request.</param>
        /// <returns>A <see cref="TaskSequence"/> that writes the pages.</returns>
        private TaskSequence WritePageImpl(Stream pageData, long startOffset, long sourceStreamPosition, BlobRequestOptions options)
        {
            CommonUtils.AssertNotNull("options", options);

            long length = pageData.Length;

            // Logic to rewind stream on a retry
            // HACK : for non seekable streams we need a way to detect the retry iteration so as to only attempt to execute once.
            // The first attempt will have SourceStreamPosition = -1, which means the first iteration on a non seekable stream.
            // The second attempt will have SourceStreamPosition = -2, anything below -1 is considered an abort. Since the Impl method
            // does not have an executino context to be aware of what iteration is used the SourceStreamPosition is utilized as counter to
            // differentiate between the first attempt and a retry.
            if (sourceStreamPosition >= 0 && pageData.CanSeek)
            {
                if (sourceStreamPosition != pageData.Position)
                {
                    pageData.Seek(sourceStreamPosition, 0);
                }
            }
            else if (sourceStreamPosition < -1)
            {
                // TODO : Need to rewrite this to support buffering in XSCL2 so that retries can work on non seekable streams
                throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, SR.CannotRetryNonSeekableStreamError));
            }

            if (startOffset % Protocol.Constants.PageSize != 0)
            {
                CommonUtils.ArgumentOutOfRange("startOffset", startOffset);
            }

            // TODO should reuse sourceStreamPoisition when the HACK above is removed, for readability using a new local variable
            long rangeStreamOffset = pageData.CanSeek ? pageData.Position : 0;

            PutPageProperties properties = new PutPageProperties()
            {
                Range = new PageRange(startOffset, startOffset + length - rangeStreamOffset - 1),
                PageWrite = PageWrite.Update,
            };

            if ((1 + properties.Range.EndOffset - properties.Range.StartOffset) % Protocol.Constants.PageSize != 0 ||
                (1 + properties.Range.EndOffset - properties.Range.StartOffset) == 0)
            {
                CommonUtils.ArgumentOutOfRange("pageData", pageData);
            }

            var webRequest = ProtocolHelper.GetWebRequest(
                this.ServiceClient,
                options,
                (timeout) => BlobRequest.PutPage(this.TransformedAddress, timeout, properties, null));

            ////BlobRequest.AddMetadata(webRequest, this.Metadata);

            // Retrieve the stream
            var requestStreamTask = webRequest.GetRequestStreamAsync();
            yield return requestStreamTask;

            // Copy the data
            using (var outputStream = requestStreamTask.Result)
            {
                var copyTask = new InvokeTaskSequenceTask(() => { return pageData.WriteTo(outputStream); });
                yield return copyTask;

                // Materialize any exceptions
                var scratch = copyTask.Result;
            }

            // signing request needs Size to be set
            this.ServiceClient.Credentials.SignRequest(webRequest);

            // Get the response
            var responseTask = webRequest.GetResponseAsyncWithTimeout(this.ServiceClient, options.Timeout);
            yield return responseTask;

            // Parse the response
            using (HttpWebResponse webResponse = responseTask.Result as HttpWebResponse)
            {
                this.ParseSizeAndLastModified(webResponse);
            }
        }

        /// <summary>
        /// Uploads the data into the web request.
        /// </summary>
        /// <param name="request">The request that is setup for a put.</param>
        /// <param name="source">The source of data.</param>
        /// <param name="result">The response from the server.</param>
        /// <returns>The sequence used for uploading data.</returns>
        internal TaskSequence UploadData(HttpWebRequest request, Stream source, Action<WebResponse> result)
        {
            // Retrieve the stream
            var requestStreamTask = request.GetRequestStreamAsync();
            yield return requestStreamTask;

            // Copy the data
            using (var outputStream = requestStreamTask.Result)
            {
                var copyTask = new InvokeTaskSequenceTask(() => { return source.WriteTo(outputStream); });
                yield return copyTask;

                // Materialize any exceptions
                var scratch = copyTask.Result;
            }

            // Get the response
            var responseTask = request.GetResponseAsyncWithTimeout(this.ServiceClient, this.ServiceClient.Timeout);
            yield return responseTask;

            // Return the response object
            var response = responseTask.Result;

            result(response);
        }

 private void StoreFile(string filename, Stream contentStream)
 {
     using (var file = File.Create(filename))
     {
         contentStream.WriteTo(file);
     }
 }

        public static void UploadFile(this WebRequest webRequest, Stream fileStream, string fileName, string mimeType)
        {
            var httpReq = (HttpWebRequest)webRequest;
            httpReq.UserAgent = Env.ServerUserAgent;
            httpReq.Method = "POST";
            httpReq.AllowAutoRedirect = false;
            httpReq.KeepAlive = false;

            var boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");

            httpReq.ContentType = "multipart/form-data; boundary=" + boundary;

            using (var ms = new MemoryStream())
            {
                var boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");

                var headerTemplate = "\r\n--" + boundary +
                                     "\r\nContent-Disposition: form-data; name=\"file\"; filename=\"{0}\"\r\nContent-Type: {1}\r\n\r\n";

                var header = string.Format(headerTemplate, fileName, mimeType);

                var headerbytes = System.Text.Encoding.ASCII.GetBytes(header);

                ms.Write(headerbytes, 0, headerbytes.Length);
                fileStream.WriteTo(ms);

                ms.Write(boundarybytes, 0, boundarybytes.Length);

                httpReq.ContentLength = ms.Length;

                var requestStream = httpReq.GetRequestStream();

                ms.Position = 0;

                ms.WriteTo(requestStream);

                requestStream.Close();
            }
        }

    /// <summary>
    /// Creates or updates a given file resource in the file system.
    /// </summary>
    /// <param name="parentFolderPath">The qualified path of the parent folder that will
    /// contain the file.</param>
    /// <param name="fileName">The name of the file to be created.</param>
    /// <param name="input">A stream that provides the file's contents.</param>
    /// <param name="overwrite">Whether an existing file should be overwritten
    /// or not. If this parameter is false and the file already exists, a
    /// <see cref="ResourceOverwriteException"/> is thrown.</param>
    /// <exception cref="VirtualResourceNotFoundException">If the parent folder
    /// does not exist.</exception>
    /// <exception cref="ResourceAccessException">In case of invalid or prohibited
    /// resource access.</exception>
    /// <exception cref="ResourceOverwriteException">If a file already exists at the
    /// specified location, and the <paramref name="overwrite"/> flag was not set.</exception>
    /// <exception cref="ArgumentNullException">If any of the parameters is a null reference.</exception>
    public override VirtualFileInfo WriteFile(string parentFolderPath, string fileName, Stream input, bool overwrite)
    {
      if (parentFolderPath == null) throw new ArgumentNullException("parentFolderPath");
      if (fileName == null) throw new ArgumentNullException("fileName");
      if (input == null) throw new ArgumentNullException("input");


      //get the parent and make sure it exists
      string absoluteParentPath;
      var parent = GetFolderInfoInternal(parentFolderPath, true, out absoluteParentPath);

      if(RootDirectory == null && parent.IsRootFolder)
      {
        VfsLog.Debug("Blocked attempt to create a file '{0}' at system root (which is the machine itself - no root directory was set).", fileName);
        throw new ResourceAccessException("Files cannot be created at the system root.");        
      }

      //combine to file path and get virtual file (also makes sure we don't get out of scope)
      string absoluteFilePath = PathUtil.GetAbsolutePath(fileName, new DirectoryInfo(absoluteParentPath));

      FileInfo fi = new FileInfo(absoluteFilePath);
      if (fi.Exists && !overwrite)
      {
        VfsLog.Debug("Blocked attempt to overwrite file '{0}'", fi.FullName);
        string msg = String.Format("The file [{0}] already exists.", fileName);
        throw new ResourceOverwriteException(msg);
      }

      try
      {
        using (Stream writeStream = new FileStream(fi.FullName, FileMode.Create, FileAccess.Write, FileShare.None))
        {
          input.WriteTo(writeStream);
        }
      }
      catch (Exception e)
      {
        //log exception with full path
        string msg = "Could not write write submitted content to file '{0}'.";
        VfsLog.Error(e, msg, fi.FullName);
        //generate exception with relative path
        msg = String.Format(msg, PathUtil.GetRelativePath(fi.FullName, RootDirectory));
        throw new ResourceAccessException(msg, e);
      }

      //return update file info
      var file = fi.CreateFileResourceInfo();

      //adjust and return
      if (UseRelativePaths) file.MakePathsRelativeTo(RootDirectory);
      return file;
    }

 public void AppendFile(string filePath, Stream stream)
 {
     var realFilePath = RootDir.RealPath.CombineWith(filePath);
     EnsureDirectory(Path.GetDirectoryName(realFilePath));
     using (var fs = new FileStream(realFilePath, FileMode.Append))
     {
         stream.WriteTo(fs);
     }
 }

 protected  void WriteFileStreamToFileSystem2(FileItem fileItem, Stream input) {
     input.WriteTo(fileItem.LocalFile.FullName);
 }