flask+ajax post 400错误
前端代码
<!DOCTYPE html><html lang="en">
<head>
<!--<meta charset="UTF-8">-->
<!--<meta http-equiv="Access-Control-Allow-Origin" content="*" />-->
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Title</title>
</head>
<meta charset="UTF-8">
<title>showImages</title>
<style type="text/css">
.float{
float:left;
width : 200px;
height: 200px;
overflow: hidden;
border: 1px solid #CCCCCC;
border-radius: 10px;
padding: 5px;
margin: 5px;
}
img{
position: relative;
}
.result{
width: 200px;
height: 200px;
text-align: center;
box-sizing: border-box;
}
#file_input{
display: none;
}
.delete{
width: 200px;
height:200px;
position: absolute;
text-align: center;
line-height: 200px;
z-index: 10;
font-size: 30px;
background-color: rgba(255,255,255,0.8);
color: #777;
opacity: 0;
transition-duration: 0.7s;
-webkit-transition-duration: 0.7s;
}
.delete:hover{
cursor: pointer;
opacity: 1;
}
</style>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript">
window.onload = function(){
var input = document.getElementById("file_input");
var result;
var dataArr = []; // 储存所选图片的结果(文件名和base64数据)
var fd; //FormData方式发送请求
var oSelect = document.getElementById("select");
var oAdd = document.getElementById("add");
var oSubmit = document.getElementById("submit");
var oInput = document.getElementById("file_input");
if(typeof FileReader==='undefined'){
alert("抱歉，你的浏览器不支持 FileReader");
input.setAttribute('disabled','disabled');
}else{
input.addEventListener('change',readFile,false);
} //handler
function readFile(){
fd = new FormData();
var iLen = this.files.length;
for(var i=0;i<iLen;i++){
if (!input['value'].match(/.jpg|.gif|.jpg|.jpeg|.bmp/i)){ //判断上传文件格式
return alert("上传的图片格式不正确，请重新选择");
}
var reader = new FileReader();
fd.append(i,this.files[i]);
reader.readAsDataURL(this.files[i]); //转成base64
reader.fileName = this.files[i].name;
reader.onload = function(e){
var imgMsg = {
name : this.fileName,//获取文件名
base64 : this.result //reader.readAsDataURL方法执行完后，base64数据储存在reader.result里
}
dataArr.push(imgMsg);
result = '<div class="delete">delete</div><div class="result">![]()</div>';
var div = document.createElement('div');
div.innerHTML = result;
div['className'] = 'float';
document.getElementsByTagName('body')[0].appendChild(div); //插入dom树
var img = div.getElementsByTagName('img')[0];
img.onload = function(){
var nowHeight = ReSizePic(this); //设置图片大小
this.parentNode.style.display = 'block';
var oParent = this.parentNode;
if(nowHeight){
oParent.style.paddingTop = (oParent.offsetHeight - nowHeight)/2 + 'px';
}
}
div.onclick = function(){
$(this).remove(); // 在页面中删除该图片元素
}
}
}
}
function send(){
var submitArr = [];
$('.subPic').each(function () {
submitArr.push({
name: $(this).attr('alt'),
base64: $(this).attr('src')
});
}
);
$.ajax({
url : 'http://127.0.0.1:5000/predict',
type : 'post',
data : JSON.stringify(submitArr),
dataType: 'json',
enctype:'multipart/form-data',
//contentType:"application / x-www-form-urlencoded",
contentType: 'application/json;charset=UTF-8',
processData: false, //用FormData传fd时需有这两项
success : function(data){
console.log('返回的数据：'+JSON.stringify(data))
}
})
}
oSelect.onclick=function(){
oInput.value = ""; // 先将oInput值清空，否则选择图片与上次相同时change事件不会触发
//清空已选图片
$('.float').remove();
oInput.click();
}
oAdd.onclick=function(){
oInput.value = ""; // 先将oInput值清空，否则选择图片与上次相同时change事件不会触发
oInput.click();
}
oSubmit.onclick=function(){
if(!dataArr.length){
return alert('请先选择文件');
}
send();
}
}
/*
用ajax发送fd参数时要告诉jQuery不要去处理发送的数据，
不要去设置Content-Type请求头才可以发送成功，否则会报“Illegal invocation”的错误，
也就是非法调用，所以要加上“processData: false,contentType: false,”
* */
function ReSizePic(ThisPic) {
var RePicWidth = 200; //这里修改为您想显示的宽度值
var TrueWidth = ThisPic.width; //图片实际宽度
var TrueHeight = ThisPic.height; //图片实际高度
if(TrueWidth>TrueHeight){
//宽大于高
var reWidth = RePicWidth;
ThisPic.width = reWidth;
//垂直居中
var nowHeight = TrueHeight * (reWidth/TrueWidth);
return nowHeight; //将图片修改后的高度返回，供垂直居中用
}else{
//宽小于高
var reHeight = RePicWidth;
ThisPic.height = reHeight;
}
}
</script>
</head>
<body>
<div class="container">
<label>请选择一个图像文件：</label>
<button id="select">(重新)选择图片</button>
<button id="add">(追加)图片</button>
<input type="file" id="file_input" name="image" multiple/> <!--用input标签并选择type=file，记得带上multiple，不然就只能单选图片了-->
<button id="submit" type="submit" class="subPic">提交</button>
</div>
</body>
</html><!DOCTYPE html>
<html lang="en">
<head>
<!--<meta charset="UTF-8">-->
<!--<meta http-equiv="Access-Control-Allow-Origin" content="*" />--> <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Title</title>
</head>
<meta charset="UTF-8">
<title>showImages</title>
<style type="text/css">
.float{
float:left;
width : 200px;
height: 200px;
overflow: hidden;
border: 1px solid #CCCCCC;
border-radius: 10px;
padding: 5px;
margin: 5px;
}
img{
position: relative;
}
.result{
width: 200px;
height: 200px;
text-align: center;
box-sizing: border-box;
}
#file_input{
display: none;
}
.delete{
width: 200px;
height:200px;
position: absolute;
text-align: center;
line-height: 200px;
z-index: 10;
font-size: 30px;
background-color: rgba(255,255,255,0.8);
color: #777;
opacity: 0;
transition-duration: 0.7s;
-webkit-transition-duration: 0.7s;
}
.delete:hover{
cursor: pointer;
opacity: 1;
}
</style>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript">
window.onload = function(){
var input = document.getElementById("file_input");
var result;
var dataArr = []; // 储存所选图片的结果(文件名和base64数据)
var fd; //FormData方式发送请求
var oSelect = document.getElementById("select");
var oAdd = document.getElementById("add");
var oSubmit = document.getElementById("submit");
var oInput = document.getElementById("file_input");
if(typeof FileReader==='undefined'){
alert("抱歉，你的浏览器不支持 FileReader");
input.setAttribute('disabled','disabled');
}else{
input.addEventListener('change',readFile,false);
} //handler
function readFile(){
fd = new FormData();
var iLen = this.files.length;
for(var i=0;i<iLen;i++){
if (!input['value'].match(/.jpg|.gif|.jpg|.jpeg|.bmp/i)){ //判断上传文件格式
return alert("上传的图片格式不正确，请重新选择");
}
var reader = new FileReader();
fd.append(i,this.files[i]);
reader.readAsDataURL(this.files[i]); //转成base64
reader.fileName = this.files[i].name;
reader.onload = function(e){
var imgMsg = {
name : this.fileName,//获取文件名
base64 : this.result //reader.readAsDataURL方法执行完后，base64数据储存在reader.result里
}
dataArr.push(imgMsg);
result = '<div class="delete">delete</div><div class="result"><img class="subPic" src="'+this.result+'" alt="flask+ajax post 400错误"/></div>';
var div = document.createElement('div');
div.innerHTML = result;
div['className'] = 'float';
document.getElementsByTagName('body')[0].appendChild(div); //插入dom树
var img = div.getElementsByTagName('img')[0];
img.onload = function(){
var nowHeight = ReSizePic(this); //设置图片大小
this.parentNode.style.display = 'block';
var oParent = this.parentNode;
if(nowHeight){
oParent.style.paddingTop = (oParent.offsetHeight - nowHeight)/2 + 'px';
}
}
div.onclick = function(){
$(this).remove(); // 在页面中删除该图片元素
}
}
}
}
function send(){
var submitArr = [];
$('.subPic').each(function () {
submitArr.push({
name: $(this).attr('alt'),
base64: $(this).attr('src')
});
}
);
$.ajax({
url : 'http://127.0.0.1:5000/predict',
type : 'post',
data : JSON.stringify(submitArr),
dataType: 'json',
enctype:'multipart/form-data',
//contentType:"application / x-www-form-urlencoded",
contentType: 'application/json;charset=UTF-8',
processData: false, //用FormData传fd时需有这两项
success : function(data){
console.log('返回的数据：'+JSON.stringify(data))
}
})
}
oSelect.onclick=function(){
oInput.value = ""; // 先将oInput值清空，否则选择图片与上次相同时change事件不会触发
//清空已选图片
$('.float').remove();
oInput.click();
}
oAdd.onclick=function(){
oInput.value = ""; // 先将oInput值清空，否则选择图片与上次相同时change事件不会触发
oInput.click();
}
oSubmit.onclick=function(){
if(!dataArr.length){
return alert('请先选择文件');
}
send();
}
}
/*
用ajax发送fd参数时要告诉jQuery不要去处理发送的数据，
不要去设置Content-Type请求头才可以发送成功，否则会报“Illegal invocation”的错误，
也就是非法调用，所以要加上“processData: false,contentType: false,”
* */
function ReSizePic(ThisPic) {
var RePicWidth = 200; //这里修改为您想显示的宽度值
var TrueWidth = ThisPic.width; //图片实际宽度
var TrueHeight = ThisPic.height; //图片实际高度
if(TrueWidth>TrueHeight){
//宽大于高
var reWidth = RePicWidth;
ThisPic.width = reWidth;
//垂直居中
var nowHeight = TrueHeight * (reWidth/TrueWidth);
return nowHeight; //将图片修改后的高度返回，供垂直居中用
}else{
//宽小于高
var reHeight = RePicWidth;
ThisPic.height = reHeight;
}
}
</script>
</head>
<body> <div class="container">
<label>请选择一个图像文件：</label>
<button id="select">(重新)选择图片</button>
<button id="add">(追加)图片</button>
<input type="file" id="file_input" name="image" multiple/> <!--用input标签并选择type=file，记得带上multiple，不然就只能单选图片了-->
<button id="submit" type="submit" class="subPic">提交</button>
</div> </body></html>
pyhton代码
@app.route('/predict', methods=['POST'])def predict():
# 获取输入数据
file = request.files['file']
#file = request.files('file',None)
img_bytes = file.read()
postman是成功了的，命令行一直报400错误，求助大佬帮忙看看
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