代码import os from flask import Flask, flash, request, redirect, url_for from werkzeug.utils import secure_filename UPLOAD_FOLDER /path/to/the/uploads #文件存储目录 ALLOWED_EXTENSIONS {txt, pdf, png, jpg, jpeg, gif} #允许上传文件类型拓展名 app Flask(__name__) app.config[UPLOAD_FOLDER] UPLOAD_FOLDER #配置 def allowed_file(filename): #检查上传文件的拓展名是否在ALLOWED_EXTENSIONS return . in filename and \ filename.rsplit(., 1)[1].lower() in ALLOWED_EXTENSIONS app.route(/, methods[GET, POST]) def upload_file(): if request.method POST: #检查是否有文件被上传 if file not in request.files: flash(No file part)#闪现提示 return redirect(request.url)#重定向 file request.files[file] # if user does not select file, browser also # submit an empty part without filename if file.filename : flash(No selected file) return redirect(request.url)#重定向 if file and allowed_file(file.filename):#有合法文件 filename secure_filename(file.filename) #secure_filename检查文件名 file.save(os.path.join(app.config[UPLOAD_FOLDER], filename)) return redirect(url_for(uploaded_file, filenamefilename)) #重定向到uploaded_file/filename app.route(/uploads/filename) def uploaded_file(filename):#传输文件 return send_from_directory(app.config[UPLOAD_FOLDER], filename)request属性及用途request.dat获取json请求体字符串request.form获取表单请求体参数request.args获取url参数request.method区分GET/POST请求方法request.files获取上传文件信息