檔案上傳組件使用。

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參考：
https://www.cnblogs.com/landeanfen/p/5007400.html

bootstrap-fileinput源碼：https://github.com/kartik-v/bootstrap-fileinput

bootstrap-fileinput線上API：http://plugins.krajee.com/file-input

bootstrap-fileinput Demo展示：http://plugins.krajee.com/file-basic-usage-demo

<script src="/static/vendors/kartik-v-bootstrap-fileinput-3540936/js/plugins/piexif.min.js"        type="text/javascript"></script><script src="/static/vendors/kartik-v-bootstrap-fileinput-3540936/js/plugins/sortable.min.js"        type="text/javascript"></script><script src="/static/vendors/kartik-v-bootstrap-fileinput-3540936/js/plugins/purify.min.js"        type="text/javascript"></script><script type="text/javascript" src="/static/vendors/kartik-v-bootstrap-fileinput-3540936/js/fileinput.min.js"></script>

 <form id="fileuploadform" enctype="multipart/form-data">                                <div class="col-md-12 col-sm-12 col-xs-12 form-group has-feedback">                                    <label class="control-label col-md-3 col-sm-12 col-xs-12"                                    >選擇檔案</label>                                    <div class="col-md-9 col-sm-12 col-xs-12">                                        <input id="input-id" type="file">                                    </div>                                </div>

$(document).ready(function () {    $("#input-id").fileinput({        showUpload:true,        uploadLabel: "xxx",        uploadTitle: "xxxx",        allowedFileExtensions: [‘xlsx‘],        maxFileSize: 10000,        maxFilesNum: 1,        uploadUrl:  "xxxx",        //showPreview：false,        enctype: ‘multipart/form-data‘,        ajaxSettings: { type: "POST",   headers: header,},        uploadExtraData: function (previewId, index) {            var obj = {};           obj["xxx"]=$("#xxx").val()            return obj;        },     });    });

 perfFile = request.FILES.get("file_data", None)  # 擷取上傳的檔案，如果沒有檔案，則預設為None    if not perfFile:        result["error"] = "no uploaded files found"        return Response(result)

檔案上傳組件使用。