标签：query nec rip accept 报错 二进制 div because 文件内容
基于jQuery的Ajaxs使用FormData上传文件要注意两个参数的设定
processData设为false
把processData设为false，让jquery不要对formData做处理，如果processData不设置为false，jquery会把formData转换为字符串。
contentType设为false
http发送multipart/form-data请求报文示例
POST /api/feed/ HTTP/1.1
Accept-Encoding: gzip
Content-Length: 225873
Content-Type: multipart/form-data; boundary=OCqxMF6-JxtxoMDHmoG5W5eY9MGRsTBp
Host: www.myhost.com
Connection: Keep-Alive
--OCqxMF6-JxtxoMDHmoG5W5eY9MGRsTBp
Content-Disposition: form-data; name="lng"
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
116.361545
--OCqxMF6-JxtxoMDHmoG5W5eY9MGRsTBp
Content-Disposition: form-data; name="lat"
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
39.979006
--OCqxMF6-JxtxoMDHmoG5W5eY9MGRsTBp
Content-Disposition: form-data; name="images"; filename="/storage/wbavrx.jpg"
Content-Type: application/octet-stream
Content-Transfer-Encoding: binary
这里是图片的二进制数据
--OCqxMF6-JxtxoMDHmoG5W5eY9MGRsTBp--
注意Content-Type: multipart/form-data; boundary=OCqxMF6-JxtxoMDHmoG5W5eY9MGRsTBp ，参数boundary为请求参数之间的界限标识。
如果jquery请求设置了contentType，那么就会覆盖了formData的content-type,导致服务器在分隔参数和文件内容时是找不到boundary，报no multipart boundary was found错误
默认情况下jquery会把contentType设置为application/x-www-form-urlencoded。要jquery不设置contentType,则需要把contentType设置为false。
var formData = new FormData($("#uploadform")[0]);
$.ajax({
url: actionUrl,
type: ‘POST‘,
data: formData,
async: false,
cache: false,
contentType: false,
processData: false,
...
});
Ajax使用formdata异步上传文件，报错the request was rejected because no multipart boundary was found
标签：query nec rip accept 报错 二进制 div because 文件内容
原文地址：https://www.cnblogs.com/zhangym118/p/9029269.html
