src/EasyFrameWork/Net/WebApi/MultipartSerializer.cs

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/* http://www.zkea.net/ 
 * Copyright (c) ZKEASOFT. All rights reserved. 
 * http://www.zkea.net/licenses */

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Runtime.Serialization.Json;
using System.IO;
using System.Collections;
using System.Collections.Generic;

namespace Easy.Net.WebApi
{
    public class MultipartSerializer : IRequestSerializer
    {
        public string GetContentTypeRegexPattern()
        {
            return MimeContentType.MultipartRegex;
        }

        public object DeserializeResponse(HttpContent content, Type responseType)
        {
            return content.ReadAsByteArrayAsync().Result;
        }

        private string GetMimeMapping(string filename)
        {
            switch (Path.GetExtension(filename))
            {
                case ".jpeg":
                    return "image/jpeg";
                case ".jpg":
                    return "image/jpeg";
                case ".gif":
                    return "image/gif";
                case ".png":
                    return "image/png";
                case ".pdf":
                    return "application/pdf";
                default:
                    return "application/octet-stream";
            }
        }

        public HttpContent SerializeRequest(HttpRequest request)
        {
            if (!(request.Body is IEnumerable<KeyValuePair<string, object>>))
            {
                throw new IOException("Request requestBody must be IEnumerable<KeyValuePair<string, object>> when Content-Type is multipart/*");
            }

            var boundary = "CustomBoundary8d0f01e6b3b5daf";
            MultipartFormDataContent form = new MultipartFormDataContent(boundary);
            var body = request.Body as IEnumerable<KeyValuePair<string, object>>;

            foreach (KeyValuePair<string, object> item in body)
            {
                if (item.Value is FileStream)
                {