WCF webHttpBinding协议上传接收文件

一般情况下wcf用webHttpBinding协议最多的场景就是前后端Json交互，会比较轻量级。

接收上传的文件也可以，不过要自己解析处理。

前端HTML很简单：

        <input type="file" id="excel"/>
        <div class="btn btn-primary"  ng-click="upFile()">上传文件</div>

前端JS也很简单：

        $scope.upFile = function () {
            var form = new FormData();
            var file = document.getElementById("excel").files[0];
            form.append('file', file);
            $http.post('/SvcWms/InDepot/UpFile', form).then(function (data) {
                if(data.data.State === 1){
                    console.log('upload success');
                }
            });
        };

后台接口定义：

        [WebInvoke(BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Json)]
        DtoResponse<bool> UpFile(Stream file);

接口实现：

    public class DtoResponse<T>
    {
        public int State { get; set; } = 1;
        public string Msg { get; set; }
        public T Data { get; set; }
    }

        public DtoResponse<bool> UpFile(Stream file)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                file.CopyTo(ms);
                ms.Position = 0;
                using (StreamReader sr = new StreamReader(ms))
                {
                    int firstLineLen = Encoding.UTF8.GetBytes(sr.ReadLine()??"").Length;
                    var position = firstLineLen + 2;
                    var line = sr.ReadLine();
                    var filename = DateTime.Now.ToString("yyMMdd.HHmmss.");

                    if(!string.IsNullOrEmpty(line)) {
                        int idx = line.IndexOf("filename", StringComparison.CurrentCultureIgnoreCase);
                        filename += line.Substring(idx + 9).Replace(""", "");
                    }

                    while (line != null)
                    {
                        // 特别是第二行含文件名称，可能含中文，所以不能直接用line.Length
                        // 因为line.Length是字符个数，不是字节个数
                        position += Encoding.UTF8.GetBytes(line).Length + 2;
                        if (line == "")
                            break;
                        line = sr.ReadLine();
                    }
                    ms.Position = position;
                    ms.SetLength(ms.Length - (firstLineLen + 6));

                    var uploadStream = new MemoryStream();
                    ms.CopyTo(uploadStream);
                    uploadStream.Position = 0;

                    File.WriteAllBytes($"d:\{filename}", uploadStream.ToArray());
                }
            }
            return new DtoResponse<bool>() {State = 1};
        }