Django 注册

时间 2019-12-05

标签 django 注册栏目 Python 繁體版

原文原文链接

一. 本地图片上传预览

1. 上传文件框隐藏到图片上面，点击图片至关于点上传文件框css

<div class="login">
    <div style="position: relative;height:80px;width: 80px; left:260px;top: -10px ">
        <img id="previewImg" style="height:80px;width: 80px;" src="/static/image/default.png">
        <input  style="height: 80px;width: 80px; position: absolute; top:0;left: 0; opacity: 0" type="file">
        {{ obj.avatar }}
    </div>
</div>

2. Ajax 上传并预览 html

#获取到头像，经过原生Ajax传到后端，后端返回一个路径，从新给image 的src赋值路径

#问题: 用户上传完头像，但没有注册,会在硬盘里出现多余的头像
#        有些网站是先上传到临时目录,注册完再移动到新的目录

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/bootstrap-3.3.5-dist/css/bootstrap.css" />
    <style>
        .login{
            width: 600px;
            margin: 0 auto;
            padding: 20px;
            margin-top: 80px;
        }
        .f1{
            position: absolute;height:80px;width: 80px;top:0;left: 0;opacity: 0;
        }

    </style>
</head>
<body>
    <div class="login">
        <div style="position: relative;height:80px;width: 80px; left:260px;top: -10px ">
            <img id="previewImg" style="height:80px;width: 80px;" src="/static/image/default.png">
            <input id="imgSelect" style="height: 80px;width: 80px; position: absolute; top:0;left: 0; opacity: 0" type="file">
            {{ obj.avatar }}
        </div>
    </div>

    <script src="/static/jquery-3.2.1.js"></script>

    <script>
        $(function () {
            bindAvartar1();
        });

        function bindAvartar1() {
            $("#imgSelect").change(function () {
                //$(this)[0]           #jquery变成DOM对象
                //$(this)[0].files     #获取上传当前文件的上传对象
                //$(this)[0].files[0]  #获取上传当前文件的上传对象的某个对象
                var obj = $(this)[0].files[0];
                console.log(obj);

                //ajax 发送后台获取头像路径
                //img src 从新定义新的路径

                var formdata = new FormData();  //建立一个对象
                formdata.append("file",obj);
                var xhr = new XMLHttpRequest();
                xhr.open("POST","/register/");
                xhr.send(formdata);

                xhr.onreadystatechange = function () {
                    if(xhr.readyState ==4){
                        var file_path = xhr.responseText;
                        console.log(file_path);
                        $("#previewImg").attr("src","/" + file_path)
                    }
                };

            })
        }
    </script>
</body>
</html>

import os
def register(request):
    if request.method == "GET":
        return render(request,"register.html")
    else:
        print(request.POST)
        print(request.FILES)
        file_obj = request.FILES.get("file")
        print(file_obj)
        file_path = os.path.join("static", file_obj.name)
        with open(file_path, "wb") as f:
            for chunk in file_obj.chunks():
                f.write(chunk)
        return HttpResponse(file_path)

views.py

3. 本地上传并预览两种方式 python

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/bootstrap-3.3.5-dist/css/bootstrap.css" />
    <style>
        .login{
            width: 600px;
            margin: 0 auto;
            padding: 20px;
            margin-top: 80px;
        }
        .f1{
            position: absolute;height:80px;width: 80px;top:0;left: 0;opacity: 0;
        }

    </style>
</head>
<body>
    <div class="login">
        <div style="position: relative;height:80px;width: 80px; left:260px;top: -10px ">
            <img id="previewImg" style="height:80px;width: 80px;" src="/static/image/default.png">
            <input id="imgSelect" style="height: 80px;width: 80px; position: absolute; top:0;left: 0; opacity: 0" type="file">
            {{ obj.avatar }}
        </div>
    </div>

    <script src="/static/jquery-3.2.1.js"></script>

    <script>
        $(function () {
            bindAvartar2();
        });

      

        function bindAvartar2() {
            $("#imgSelect").change(function () {
                var obj = $(this)[0].files[0];
                console.log(obj);

                //将文件对象上传到浏览器
                //IE10 如下不支持
                var v = window.URL.createObjectURL(obj);
                $("#previewImg").attr("src",v);

                //不会自动释放内存
                //当加载完图片后,释放内存
                document.getElementById("previewImg").onload= function () {
                    window.URL.revokeObjectURL(v);
                };
            })
        }





        function bindAvartar3() {
            $("#imgSelect").change(function () {
                var obj = $(this)[0].files[0];
                console.log(obj);

                var reader = new FileReader();
                reader.onload = function (e) {
                    $("#previewImg").attr("src",this.result);
                };
                reader.readAsDataURL(obj)
            })
        }

    </script>
</body>
</html>

View Code

4.之后用法 jquery

#先用本地预览，若是不支持，使用第三种方法

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/bootstrap-3.3.5-dist/css/bootstrap.css" />
    <style>
        .login{
            width: 600px;
            margin: 0 auto;
            padding: 20px;
            margin-top: 80px;
        }
        .f1{
            position: absolute;height:80px;width: 80px;top:0;left: 0;opacity: 0;
        }

    </style>
</head>
<body>
    <div class="login">
        <div style="position: relative;height:80px;width: 80px; left:260px;top: -10px ">
            <img id="previewImg" style="height:80px;width: 80px;" src="/static/image/default.png">
            <input id="imgSelect" style="height: 80px;width: 80px; position: absolute; top:0;left: 0; opacity: 0" type="file">

        </div>
    </div>

    <script src="/static/jquery-3.2.1.js"></script>

    <script>
        $(function(){
           bindAvatar();
        });

        function bindAvatar(){
            if(window.URL.createObjectURL){
                bindAvatar2();
            }else if(window.FileReader){
                bindAvatar3()
            }else{
                bindAvatar1();
            }
        }



        function bindAvatar1() {
            $("#imgSelect").change(function () {
                //$(this)[0]           #jquery变成DOM对象
                //$(this)[0].files     #获取上传当前文件的上传对象
                //$(this)[0].files[0]  #获取上传当前文件的上传对象的某个对象
                var obj = $(this)[0].files[0];
                console.log(obj);

                //ajax 发送后台获取头像路径
                //img src 从新定义新的路径

                var formdata = new FormData();  //建立一个对象
                formdata.append("file",obj);
                var xhr = new XMLHttpRequest();
                xhr.open("POST","/register/");
                xhr.send(formdata);

                xhr.onreadystatechange = function () {
                    if(xhr.readyState ==4){
                        var file_path = xhr.responseText;
{#                        console.log(file_path);#}
                        $("#previewImg").attr("src","/" + file_path)
                    }
                };
            })
        }


        function bindAvatar2() {
            $("#imgSelect").change(function () {
                var obj = $(this)[0].files[0];
                console.log(obj);

                //将文件对象上传到浏览器
                //IE10 如下不支持


                //不会自动释放内存
                //当加载完图片后,释放内存

                document.getElementById("previewImg").onload= function () {
                    window.URL.revokeObjectURL(v);
                };

                var v = window.URL.createObjectURL(obj);
                $("#previewImg").attr("src",v);
            })
        }





        function bindAvatar3() {
            $("#imgSelect").change(function () {
                var obj = $(this)[0].files[0];
                console.log(obj);

                var reader = new FileReader();
                reader.onload = function (e) {
                    $("#previewImg").attr("src",this.result);
                };
                reader.readAsDataURL(obj)
            })
        }



    </script>
</body>
</html>

View Code