本章我們介紹Flask Web開(kāi)發(fā)中涉及的文件上傳模塊
定義后臺(tái)接收處理邏輯
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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'}) |
判定文件類型
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def allowed_file(filename): return '.' in filename and \ filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS |
前臺(tái)頁(yè)面代碼
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<div class="layui-inline"> <label class="layui-form-label">上傳文件</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>上傳文件</button></div> |
上傳按鈕初始化及回調(diào)
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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 + '上傳成功'); $("#upload_message").val(res.filename); $("#img_delete").show() } else { layer.alert('上傳失敗'); $("#upload_message").val('上傳失??！'); } } });}) |
當(dāng)然允許上傳，同時(shí)也應(yīng)該允許對(duì)以刪除文件進(jìn)行刪除
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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'}) |
刪除按鈕初始化及回調(diào)處理
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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 + '"刪除成功！'); $("#upload_message").val('') $("img_delete").hide() } else { layer.msg('"' + filename + '"刪除失敗！'); } } }) }) } |
實(shí)現(xiàn)效果
源碼參考：flask-sqlalchemy-web
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://blog.csdn.net/kangkanglou/article/details/79027425
