Flask框架 之request对象

一、request对象属性

属性说明类型
data 记录请求的数据,并转换为字符串 *
form 记录请求中的表单数据 MultiDict
args 记录请求中的查询参数 MultiDict
cookies 记录请求中的cookie信息 Dict
headers 记录请求中的报文头 EnvironHeaders
method 记录请求使用的HTTP方法 GET/POST
url 记录请求的URL地址 string
files 记录请求上传的文件 *

二、form、data、args使用

@app.route("/login", methods=["GET", "POST"])
def login():
    print(request.data)
    # 获取表单提交的数据用request.form
    name = request.form.get("name")
    password = request.form.get("password")
    # 获取相同名称,返回列表
    name_li = request.form.getlist("name")
    # 获取queryString数据用
    city = request.args.get("city")
    # 判断请求类型
    if request.method == "GET":
        pass
    elif request.method == "POST":
        pass
    # 获取json数据
    j_name = request.json.get("name")
    return "name=%s, password=%s" % (name, password)

 三、文件上传

前端代码:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>文件上传</title>
    <link rel="stylesheet" href="/static/layui/css/layui.css" media="all">
    <style>
        .layui-upload {
            text-align: center;
            margin-top: 10%;
        }

        img {
            width: 200px;
        }
    </style>
</head>
<body>
<div class="layui-upload">
    <button type="button" class="layui-btn" id="test1">上传图片</button>
    <div class="layui-upload-list">
        <img class="layui-upload-img" id="demo1">
        <p id="demoText"></p>
    </div>
</div>
<script src="/static/layui/layui.js" charset="utf-8"></script>
<script>
    layui.use('upload', function () {
        var $ = layui.jquery
            , upload = layui.upload;

        //普通图片上传
        var uploadInst = upload.render({
            elem: '#test1'
            , url: '/upload'
            , before: function (obj) {
                //预读本地文件示例,不支持ie8
                obj.preview(function (index, file, result) {
                    $('#demo1').attr('src', result); //图片链接(base64)
                });
            }
            , done: function (res) {
                //如果上传失败
                if (res.code > 0) {
                    return layer.msg('上传失败');
                }
                //上传成功
                return layer.msg(res.msg);
            }
            , error: function () {
                //演示失败状态,并实现重传
                var demoText = $('#demoText');
                demoText.html('<span style="color: #FF5722;">上传失败</span> <a class="layui-btn layui-btn-xs demo-reload">重试</a>');
                demoText.find('.demo-reload').on('click', function () {
                    uploadInst.upload();
                });
            }
        });
    });
</script>
</body>
</html>
View Code

python脚本:

@app.route("/upload", methods=["POST", "GET"])
def upload():
    if request.method == "GET":
        return render_template("upload.html")
    elif request.method == "POST":
        files = request.files
        if "file" not in files:
            return json.dumps({"code": 1, "msg": "上传失败"})
        file = files.get("file")
        file.save("./static/upload/" + file.filename)
        return json.dumps({"code": 0, "msg": "上传成功"})

效果图如下:

 

posted @ 2019-06-12 13:10  样子2018  阅读(828)  评论(0编辑  收藏  举报