python文件上传的三种方式，python文件上传,def upload
python文件上传的三种方式，python文件上传,def upload
def upload(request): return render(request, ‘upload.html‘)def upload_file(request): username = request.POST.get(‘username‘) fafafa = request.FILES.get(‘fafafa‘) with open(fafafa.name, ‘wb‘) as f: for item in fafafa.chunks(): f.write(item) print(username) ret = {‘code‘: ‘123456‘, ‘data‘: ‘hahahaha‘} import json return HttpResponse(json.dumps(ret))views.py1.xmlHttpResquest
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head> <style> .file{ width: 100px; height: 50px; position: absolute; z-index: 100; opacity: 0; } .upload{ width: 100px; height: 50px; position: absolute; z-index: 90; top: 0; bottom: 0; right: 0; left: 0; background-color: blue; text-align: center; line-height: 50px; border-radius: 30px; color: white; } </style><body> <div style="position: relative;height: 50px;width: 100px;"> <input class="file" type="file" id="fafafa"> <a class="upload">上传</a> </div> <input type="button" value="xhr提交" onclick="xhrSubmit()"> <script src="/static/jquery-1.12.4.js"></script> <script> function xhrSubmit() { var file_obj = document.getElementById(‘fafafa‘).files[0]; var fd = new FormData(); fd.append(‘username‘,‘root‘) fd.append(‘fafafa‘,file_obj) var xhr = new XMLHttpRequest(); xhr.open(‘POST‘, ‘/upload_file/‘,true); <!--onreadystatechange可以监测xhr的状态变化--> xhr.onreadystatechange = function(){ if(xhr.readyState == 4){ // 接收完毕 var obj = JSON.parse(xhr.responseText); console.log(obj); } }; xhr.send(fd); } </script></body></html>View Code2.jQuery
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head> <style> .file{ width: 100px; height: 50px; position: absolute; z-index: 100; opacity: 0; } .upload{ width: 100px; height: 50px; position: absolute; z-index: 90; top: 0; bottom: 0; right: 0; left: 0; background-color: blue; text-align: center; line-height: 50px; border-radius: 30px; color: white; } </style><body> <div style="position: relative;height: 50px;width: 100px;"> <input class="file" type="file" id="fafafa"> <a class="upload">上传</a> </div> <input type="button" value="jQuery提交" onclick="jqSubmit()"> <script src="/static/jquery-1.12.4.js"></script> <script> function jqSubmit() { {#var file_obj = $(‘fafafa‘).files[0];#} var file_obj = document.getElementById(‘fafafa‘).files[0]; var fd = new FormData(); fd.append(‘username‘,‘root‘); fd.append(‘fafafa‘,file_obj); $.ajax({ url: ‘/upload_file/‘, type: ‘post‘, data: fd, processData: false, // tell jQuery not to process the data contentType: false, // tell jQuery not to set contentType success:function (arg,a1,a2) { console.log(arg); console.log(a1); console.log(a2); } }) } </script></body></html>View Code3.iframe
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title></head><body> <form action="/upload_file/" method="POST" enctype="multipart/form-data" target="ifm1"> <!--这里添加iframe是由于需要有一个html接收"/upload_file/"方法返回的参数，一般为HttpResponse，所以这里使用iframe接收， iframe一般设置为"display：none"将其隐藏--> <iframe id=‘ifm1‘ name="ifm1"></iframe> <input type="file" name="fafafa"> <input type="submit" onclick="iframeSubmit()" value="iframe提交"> </form> <script src="/static/jquery-1.12.4.js"></script> <script> function iframeSubmit() { $(‘#ifm1‘).load(function () { var text = $(‘#ifm1‘).contents().find(‘body‘).text(); var obj = JSON.parse(text) console.log(obj) }) } </script></body></html>View CodeFormData
TheFormDatainterface provides a way to easily construct a set of key/value pairs representing form fields and their values, which can then be easily sent using theXMLHttpRequest.send()method. It uses the same format a form would use if the encoding type were set to"multipart/form-data".
An object implementingFormDatacan directly be used in afor...ofstructure, instead ofentries():for (var p of myFormData)is equivalent tofor (var p of myFormData.entries()).
FormData对象用以将数据编译成键值对，以便用XMLHttpRequest来发送数据。其主要用于发送表单数据，但亦可用于发送带键数据(keyed data)，而独立于表单使用。如果表单enctype属性设为multipart/form-data，则会使用表单的submit()方法来发送数据，从而，发送数据具有同样形式。
https://developer.mozilla.org/en-US/docs/Web/API/FormData
1、通过get(key)与getAll(key)来获取相对应的值
// 获取key为age的第一个值formdata.get("age"); // 获取key为age的所有值，返回值为数组类型formdata.getAll("age");View Code2、通过append(key,value)在数据末尾追加数据
//通过FormData构造函数创建一个空对象var formdata=new FormData();//通过append()方法在末尾追加key为name值为laoliu的数据formdata.append("name","laoliu");//通过append()方法在末尾追加key为name值为laoli的数据formdata.append("name","laoli");//通过append()方法在末尾追加key为name值为laotie的数据formdata.append("name","laotie");//通过get方法读取key为name的第一个值console.log(formdata.get("name"));//laoliu//通过getAll方法读取key为name的所有值console.log(formdata.getAll("name"));//["laoliu", "laoli", "laotie"]View Code3、通过set(key, value)来设置修改数据
# key的值不存在，会添加一条数据//通过FormData构造函数创建一个空对象var formdata=new FormData();//如果key的值不存在会为数据添加一个key为name值为laoliu的数据formdata.set("name","laoli");//通过get方法读取key为name的第一个值console.log(formdata.get("name"));//laoliView Code4、通过has(key)来判断是否存在对应的key值
//通过FormData构造函数创建一个空对象var formdata=new FormData();//通过append()方法在末尾追加key为name值为laoliu的数据formdata.append("name","laoliu");//判断是否包含key为name的数据console.log(formdata.has("name"));//true//判断是否包含key为age的数据console.log(formdata.has("age"));//falseView Code5、通过delete(key)可以删除数据
//通过FormData构造函数创建一个空对象var formdata=new FormData();//通过append()方法在末尾追加key为name值为laoliu的数据formdata.append("name","laoliu");console.log(formdata.get("name"));//laoliu//删除key为name的值formdata.delete("name");console.log(formdata.get("name"));//nullView Code通过XMLHttpRequest发送数据
<form id="advForm"> <p>广告名称：<input type="text" name="advName" value="xixi"></p> <p>广告类别：<select name="advType"> <option value="1">轮播图</option> <option value="2">轮播图底部广告</option> <option value="3">热门回收广告</option> <option value="4">优品精选广告</option> </select></p> <p>广告图片：<input type="file" name="advPic"></p> <p>广告地址：<input type="text" name="advUrl"></p> <p>广告排序：<input type="text" name="orderBy"></p> <p><input type="button" id="btn" value="添加"></p></form>HTML
var btn=document.querySelector("#btn");btn.onclick=function(){ var formdata=new FormData(document.getElementById("advForm")); var xhr=new XMLHttpRequest(); xhr.open("post","http://127.0.0.1/adv"); xhr.send(formdata); xhr.onload=function(){ if(xhr.status==200){ //... } }}JSpython文件上传的三种方式
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