定义后台接收处理逻辑
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# http: //flask.pocoo.org/docs/0.12/patterns/fileuploads/ @app .route( '/upload' , methods=[ 'POST' ]) def upload_file(): if request.method == 'POST' : # check if the post request has the file part if 'file' not in request.files: logger.debug( 'No file part' ) return jsonify({ 'code' : - 1 , 'filename' : '' , 'msg' : 'No file part' }) file = request.files[ 'file' ] # if user does not select file, browser also submit a empty part without filename if file.filename == '' : logger.debug( 'No selected file' ) return jsonify({ 'code' : - 1 , 'filename' : '' , 'msg' : 'No selected file' }) else : try : if file and allowed_file(file.filename): origin_file_name = file.filename logger.debug( 'filename is %s' % origin_file_name) # filename = secure_filename(file.filename) filename = origin_file_name if os.path.exists(UPLOAD_PATH): logger.debug( '%s path exist' % UPLOAD_PATH) pass else : logger.debug( '%s path not exist, do make dir' % UPLOAD_PATH) os.makedirs(UPLOAD_PATH) file.save(os.path.join(UPLOAD_PATH, filename)) logger.debug( '%s save successfully' % filename) return jsonify({ 'code' : 0 , 'filename' : origin_file_name, 'msg' : '' }) else : logger.debug( '%s not allowed' % file.filename) return jsonify({ 'code' : - 1 , 'filename' : '' , 'msg' : 'File not allowed' }) except Exception as e: logger.debug( 'upload file exception: %s' % e) return jsonify({ 'code' : - 1 , 'filename' : '' , 'msg' : 'Error occurred' }) else : return jsonify({ 'code' : - 1 , 'filename' : '' , 'msg' : 'Method not allowed' }) |
判定文件类型
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def allowed_file(filename): return '.' in filename and \ filename.rsplit( '.' , 1 )[ 1 ].lower() in ALLOWED_EXTENSIONS |
前台页面代码
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< div class = "layui-inline" > < label class = "layui-form-label" >上传文件</ label > < div class = "layui-input-inline" > < input type = "text" name = "attach" id = "upload_message" lay-verify = "required" autocomplete = "off" class = "layui-input" readonly = "readonly" > </ div > </ div > < div class = "layui-inline" > < img id = 'img_delete' src = "{{ url_for('static', filename='images/delete.png')}}" onclick = "do_delete()" style = "display: none;" > < button type = "button" class = "layui-btn" id = "upload" >< i class = "layui-icon" ></ i >上传文件</ button > </ div > |
上传按钮初始化及回调
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layui.use([ 'upload' , 'layer' ], function () { var upload = layui.upload; var layer = layui.layer; upload.render({ elem: '#upload' , url: '/upload' , accept: 'file' , exts: 'txt' , size: 2048 , done: function (res) { console.log(res); if (res.code = = = 0 ) { layer.msg(res.filename + '上传成功' ); $( "#upload_message" ).val(res.filename); $( "#img_delete" ).show() } else { layer.alert( '上传失败' ); $( "#upload_message" ).val( '上传失败!' ); } } }); }) |
当然允许上传,同时也应该允许对以删除文件进行删除
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@app .route( '/delete' , methods = [ 'GET' ]) def delete_file(): if request.method = = 'GET' : filename = request.args.get( 'filename' ) timestamp = request.args.get( 'timestamp' ) logger.debug( 'delete file : %s, timestamp is %s' % (filename, timestamp)) try : fullfile = os.path.join(UPLOAD_PATH, filename) if os.path.exists(fullfile): os.remove(fullfile) logger.debug( "%s removed successfully" % fullfile) return jsonify({ 'code' : 0 , 'msg' : ''}) else : return jsonify({ 'code' : - 1 , 'msg' : 'File not exist' }) except Exception as e: logger.debug( "delete file error %s" % e) return jsonify({ 'code' : - 1 , 'msg' : 'File deleted error' }) else : return jsonify({ 'code' : - 1 , 'msg' : 'Method not allowed' }) |
删除按钮初始化及回调处理
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function do_delete() { var filename = $( "#upload_message" ).val(); layui.use([ 'upload' , 'layer' ], function () { var layer = layui.layer; $.ajax({ url: '/delete?filename=' + filename + "×tamp=" + new Date().getTime() , type : 'GET' , success: function (response) { console.log(response) if (response.code = = 0 ) { layer.msg( '"' + filename + '"删除成功!'); $("#upload_message").val('') $("img_delete").hide() } else { layer.msg('"' + filename + '"删除失败!' ); } } }) }) } |
实现效果
源码参考:flask-sqlalchemy-web
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/kangkanglou/article/details/79027425