Exemplo n.º 1
0
    public async Task ReadSmallFormAsyncPipe()
    {
        var pipe  = new Pipe();
        var bytes = Encoding.UTF8.GetBytes("foo=bar&baz=boo");

        for (var i = 0; i < 1000; i++)
        {
            pipe.Writer.Write(bytes);
            pipe.Writer.Complete();
            var formReader = new FormPipeReader(pipe.Reader);
            await formReader.ReadFormAsync();

            pipe.Reader.Complete();
            pipe.Reset();
        }
    }
Exemplo n.º 2
0
    public async Task ResetPipeWorks()
    {
        // Same test that is in the benchmark
        var pipe  = new Pipe();
        var bytes = Encoding.UTF8.GetBytes("foo=bar&baz=boo");

        for (var i = 0; i < 1000; i++)
        {
            pipe.Writer.Write(bytes);
            pipe.Writer.Complete();
            var formReader = new FormPipeReader(pipe.Reader);
            await formReader.ReadFormAsync();

            pipe.Reader.Complete();
            pipe.Reset();
        }
    }
Exemplo n.º 3
0
 internal virtual Task <Dictionary <string, StringValues> > ReadFormAsync(FormPipeReader reader)
 {
     return(reader.ReadFormAsync());
 }
Exemplo n.º 4
0
        private async Task <IFormCollection> InnerReadFormAsync(CancellationToken cancellationToken)
        {
            if (!HasFormContentType)
            {
                throw new InvalidOperationException("Incorrect Content-Type: " + _request.ContentType);
            }

            cancellationToken.ThrowIfCancellationRequested();

            if (_request.ContentLength == 0)
            {
                return(FormCollection.Empty);
            }

            if (_options.BufferBody)
            {
                _request.EnableRewind(_options.MemoryBufferThreshold, _options.BufferBodyLengthLimit);
            }

            FormCollection     formFields = null;
            FormFileCollection files      = null;

            // Some of these code paths use StreamReader which does not support cancellation tokens.
            using (cancellationToken.Register((state) => ((HttpContext)state).Abort(), _request.HttpContext)) {
                var contentType = ContentType;
                // Check the content-type
                if (HasApplicationFormContentType(contentType))
                {
                    var encoding   = FilterEncoding(contentType.Encoding);
                    var formReader = new FormPipeReader(_request.BodyReader, encoding)
                    {
                        ValueCountLimit  = _options.ValueCountLimit,
                        KeyLengthLimit   = _options.KeyLengthLimit,
                        ValueLengthLimit = _options.ValueLengthLimit,
                    };
                    formFields = new FormCollection(await formReader.ReadFormAsync(cancellationToken));
                }
                else if (HasMultipartFormContentType(contentType))
                {
                    var formAccumulator = new KeyValueAccumulator();

                    var boundary        = GetBoundary(contentType, _options.MultipartBoundaryLengthLimit);
                    var multipartReader = new MultipartReader(boundary, _request.Body)
                    {
                        HeadersCountLimit  = _options.MultipartHeadersCountLimit,
                        HeadersLengthLimit = _options.MultipartHeadersLengthLimit,
                        BodyLengthLimit    = _options.MultipartBodyLengthLimit,
                    };
                    var section = await multipartReader.ReadNextSectionAsync(cancellationToken);

                    while (section != null)
                    {
                        // Parse the content disposition here and pass it further to avoid reparsings
                        if (!ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var contentDisposition))
                        {
                            throw new InvalidDataException("Form section has invalid Content-Disposition value: " + section.ContentDisposition);
                        }

                        if (contentDisposition.IsFileDisposition())
                        {
                            var fileSection = new FileMultipartSection(section, contentDisposition);

                            // Enable buffering for the file if not already done for the full body
                            section.EnableRewind(
                                _request.HttpContext.Response.RegisterForDispose,
                                _options.MemoryBufferThreshold, _options.MultipartBodyLengthLimit);

                            // Find the end
                            await section.Body.DrainAsync(cancellationToken);

                            var name     = fileSection.Name;
                            var fileName = fileSection.FileName;

                            FormFile file;
                            if (section.BaseStreamOffset.HasValue)
                            {
                                // Relative reference to buffered request body
                                file = new FormFile(_request.Body, section.BaseStreamOffset.GetValueOrDefault(), section.Body.Length, name, fileName);
                            }
                            else
                            {
                                // Individually buffered file body
                                file = new FormFile(section.Body, 0, section.Body.Length, name, fileName);
                            }
                            file.Headers = new HeaderDictionary(section.Headers);

                            if (files == null)
                            {
                                files = new FormFileCollection();
                            }
                            if (files.Count >= _options.ValueCountLimit)
                            {
                                throw new InvalidDataException($"Form value count limit {_options.ValueCountLimit} exceeded.");
                            }
                            files.Add(file);
                        }
                        else if (contentDisposition.IsFormDisposition())
                        {
                            var formDataSection = new FormMultipartSection(section, contentDisposition);

                            // Content-Disposition: form-data; name="key"
                            //
                            // value

                            // Do not limit the key name length here because the multipart headers length limit is already in effect.
                            var key   = formDataSection.Name;
                            var value = await formDataSection.GetValueAsync();

                            formAccumulator.Append(key, value);
                            if (formAccumulator.ValueCount > _options.ValueCountLimit)
                            {
                                throw new InvalidDataException($"Form value count limit {_options.ValueCountLimit} exceeded.");
                            }
                        }
                        else
                        {
                            System.Diagnostics.Debug.Assert(false, "Unrecognized content-disposition for this section: " + section.ContentDisposition);
                        }

                        section = await multipartReader.ReadNextSectionAsync(cancellationToken);
                    }

                    if (formAccumulator.HasValues)
                    {
                        formFields = new FormCollection(formAccumulator.GetResults(), files);
                    }
                }
            }

            // Rewind so later readers don't have to.
            if (_request.Body.CanSeek)
            {
                _request.Body.Seek(0, SeekOrigin.Begin);
            }

            if (formFields != null)
            {
                Form = formFields;
            }
            else if (files != null)
            {
                Form = new FormCollection(null, files);
            }
            else
            {
                Form = FormCollection.Empty;
            }

            return(Form);
        }