上传文件大于2M，提示错误信息，（提示与json格式无关，是api内部限制了上传文件大小），需用哪个api能解决上传文件大小问题（上传文件格式，pdf，word，xlsx，ppt）

Unexpected token < in JSON at position 0;at api uploadFile success callback function

SyntaxError: Unexpected token < in JSON at position 0

    at JSON.parse (<anonymous>)

    at success (http://127.0.0.1:15704/appservice/pages/panel/panel.js:264:32)

附代码：

wx.chooseMessageFile({

count: 1,

//type: ‘file’,

success(res) {

// tempFilePath可以作为img标签的src属性显示图片

console.log(“res:”, res)

const tempFiles = res.tempFiles;

var fileinfo = tempFiles[0]// tempFiles[idx]

console.log(“fileinfo:”, fileinfo);

wx.uploadFile({

header: {

‘content-type’: ‘multipart/form-data’,

//‘Content-Type’: ‘application/x-www-form-urlencoded’

},

// method: ‘POST’,

// header: { ‘content-type’: ‘application/x-www-form-urlencoded’ },

url: constant.root_upload_url,

filePath: fileinfo[‘path’],

name: ‘file’,

formData: {

‘userid’: userid,

‘menuid’: currentMenuId,

‘filename’: fileinfo[‘name’],

},

success(res) {

const t_data = res.data

var jsonObj = JSON.parse(t_data);

//刷新文件列表

if (!jsonObj[‘errorFlag’]) {

wx.showModal({

title: ‘提示信息’,

content: jsonObj.errorMsg,

})

} else {

//上传成功，刷新文件列表

that.reloadFolderList(currentMenuId);

}

},

error(error) {

console.log(“error:”, error)

wx.showModal({

title: ‘提示信息’,

content: ‘抱歉，数据解析异常，请稍后重试！’,

})

//do something

}

}

)

// }