我想知道这是可能到吗？我一直得到报错“The body of your POST request is not well-formed multipart/form-data.”
我用一个云函数计算所需要到Auth，返还这个Auth给微信小程序后我想直接用wx.uploadFile上传图片到COS。以下是我实际的代码
wx.uploadFile({

url: "https://bucketname-appid.cos.ap-guangzhou.myqcloud.com",

filePath: this.data.imgSrc, // 这个imgSrc看起来是这样的 http://tmp/wx06831dfa43ec02c8.tGEdCWwps.6OYqN...jHa01.jpg

name: 'file',

header: {

'Authorization': resData.data, // 这里的data看起来是这样的 q-sign-algorithm=sha1&q-ak=AKIDK1a...&q-sign-time=1538223445;1538222464&q-key-time=1538223445;1538222464&q-header-list=&q-url-param-list=&q-signature=23b157...

"Content-Type": "multipart/form-data",

'Host': "bucketname-appid.cos.ap-guangzhou.myqcloud.com"

},

success: function (uploadRes) {

console.log('ssss::: ', uploadRes)

},

fail: function (e) {

console.log('e', e)

}

});

**我用“bucketname-appid"代替了真实的bucketname和appid
这段代码会运行success中的callback，console.log显示如下
data:"?? MalformedPOSTRequest?
The body of your POST request is not well-formed multipart/form-data.?
bucketname-appid.cos.ap-guangzhou.myqcloud.com?
NWJh....FiMTc=?
OGVm...gzMzdjOTA=???"
errMsg:"uploadFile:ok"
statusCode:400