/// <summary> /// Looks for the "start" parameter of the parent's content type and then finds the corresponding /// child HttpContent with a matching Content-ID header field. /// </summary> /// <returns>The matching child or null if none found.</returns> private static HttpContent FindRootContent(HttpContent parent, IEnumerable <HttpContent> children) { Contract.Assert(children != null); // Find 'start' parameter from parent content type. The value is used // to identify the MIME body with the corresponding Content-ID header value. NameValueHeaderValue startNameValue = FindMultipartRelatedParameter(parent, StartParameter); if (startNameValue == null) { // If we didn't find a "start" parameter then take the first child. return(children.FirstOrDefault()); } // Look for the child with a Content-ID header that corresponds to the "start" value. // If no matching child is found then we return null. string startValue = FormattingUtilities.UnquoteToken(startNameValue.Value); return(children.FirstOrDefault( content => { IEnumerable <string> values; if (content.Headers.TryGetValues(ContentID, out values)) { return String.Equals( FormattingUtilities.UnquoteToken(values.ElementAt(0)), startValue, StringComparison.OrdinalIgnoreCase); } return false; })); }
/// <summary> /// Initializes a new instance of the <see cref="MimeBodyPart"/> class. /// </summary> /// <param name="streamProvider">The stream provider.</param> /// <param name="maxBodyPartHeaderSize">The max length of the MIME header within each MIME body part.</param> /// <param name="parentContent">The part's parent content</param> public MimeBodyPart(MultipartStreamProvider streamProvider, int maxBodyPartHeaderSize, HttpContent parentContent) { Contract.Assert(streamProvider != null); Contract.Assert(parentContent != null); this._streamProvider = streamProvider; this._parentContent = parentContent; this.Segments = new List <ArraySegment <byte> >(2); this._headers = FormattingUtilities.CreateEmptyContentHeaders(); this.HeaderParser = new InternetMessageFormatHeaderParser(this._headers, maxBodyPartHeaderSize); }
/// <summary> /// Validates whether the content contains an HTTP Request or an HTTP Response. /// </summary> /// <param name="content">The content to validate.</param> /// <param name="isRequest">if set to <c>true</c> if the content is either an HTTP Request or an HTTP Response.</param> /// <param name="throwOnError">Indicates whether validation failure should result in an <see cref="Exception"/> or not.</param> /// <returns><c>true</c> if content is either an HTTP Request or an HTTP Response</returns> internal static bool ValidateHttpMessageContent(HttpContent content, bool isRequest, bool throwOnError) { if (content == null) { throw Error.ArgumentNull("content"); } MediaTypeHeaderValue contentType = content.Headers.ContentType; if (contentType != null) { if (!contentType.MediaType.Equals(DefaultMediaType, StringComparison.OrdinalIgnoreCase)) { if (throwOnError) { throw Error.Argument("content", Resources.HttpMessageInvalidMediaType, FormattingUtilities.HttpContentType.Name, isRequest ? DefaultRequestMediaType : DefaultResponseMediaType); } else { return(false); } } foreach (NameValueHeaderValue parameter in contentType.Parameters) { if (parameter.Name.Equals(MsgTypeParameter, StringComparison.OrdinalIgnoreCase)) { string msgType = FormattingUtilities.UnquoteToken(parameter.Value); if (!msgType.Equals(isRequest ? DefaultRequestMsgType : DefaultResponseMsgType, StringComparison.OrdinalIgnoreCase)) { if (throwOnError) { throw Error.Argument("content", Resources.HttpMessageInvalidMediaType, FormattingUtilities.HttpContentType.Name, isRequest ? DefaultRequestMediaType : DefaultResponseMediaType); } else { return(false); } } return(true); } } } if (throwOnError) { throw Error.Argument("content", Resources.HttpMessageInvalidMediaType, FormattingUtilities.HttpContentType.Name, isRequest ? DefaultRequestMediaType : DefaultResponseMediaType); } else { return(false); } }
/// <summary> /// Copies the unsorted header fields to a sorted collection. /// </summary> /// <param name="source">The unsorted source headers</param> /// <param name="destination">The destination <see cref="HttpRequestHeaders"/> or <see cref="HttpResponseHeaders"/>.</param> /// <param name="contentStream">The input <see cref="Stream"/> used to form any <see cref="HttpContent"/> being part of this HTTP request.</param> /// <param name="rewind">Start location of any request entity within the <paramref name="contentStream"/>.</param> /// <returns>An <see cref="HttpContent"/> instance if header fields contained and <see cref="HttpContentHeaders"/>.</returns> private static HttpContent CreateHeaderFields(HttpHeaders source, HttpHeaders destination, Stream contentStream, int rewind) { Contract.Assert(source != null, "source headers cannot be null"); Contract.Assert(destination != null, "destination headers cannot be null"); Contract.Assert(contentStream != null, "contentStream must be non null"); HttpContentHeaders contentHeaders = null; HttpContent content = null; // Set the header fields foreach (KeyValuePair <string, IEnumerable <string> > header in source) { if (!destination.TryAddWithoutValidation(header.Key, header.Value)) { if (contentHeaders == null) { contentHeaders = FormattingUtilities.CreateEmptyContentHeaders(); } contentHeaders.TryAddWithoutValidation(header.Key, header.Value); } } // If we have content headers then create an HttpContent for this Response if (contentHeaders != null) { // Need to rewind the input stream to be at the position right after the HTTP header // which we may already have parsed as we read the content stream. if (!contentStream.CanSeek) { throw Error.InvalidOperation(Resources.HttpMessageContentStreamMustBeSeekable, "ContentReadStream", FormattingUtilities.HttpResponseMessageType.Name); } contentStream.Seek(0 - rewind, SeekOrigin.Current); content = new StreamContent(contentStream); contentHeaders.CopyTo(content.Headers); } return(content); }
/// <summary> /// Read the non-file contents as form data. /// </summary> /// <returns>A <see cref="Task"/> representing the post processing.</returns> public static async Task ReadFormDataAsync(Collection <HttpContent> contents, NameValueCollection formData, CancellationToken cancellationToken) { // Find instances of HttpContent for which we created a memory stream and read them asynchronously // to get the string content and then add that as form data foreach (HttpContent content in contents) { ContentDispositionHeaderValue contentDisposition = content.Headers.ContentDisposition; // If FileName is null or empty, the content is form data and will be processed. if (String.IsNullOrEmpty(contentDisposition.FileName)) { // Extract name from Content-Disposition header. We know from earlier that the header is present. string formFieldName = FormattingUtilities.UnquoteToken(contentDisposition.Name) ?? String.Empty; // Read the contents as string data and add to form data cancellationToken.ThrowIfCancellationRequested(); string formFieldValue = await content.ReadAsStringAsync(); formData.Add(formFieldName, formFieldValue); } } }