如何将函数内部的变量作为全局变量获取？

Question

I am getting http post message, but can't get the body outside the getRawBody function.

Here is my code:

getRawBody(req, function(err, body) {
    for (var key in req.queries) {
     var value = req.queries[key];
      resp.setHeader(key, value);
    }
    string = params.body = body.toString();
    string=querystring.parse(string);
    data=string.data;
    object=JSON.parse(data);
    console.log(object)     
    resp.send(JSON.stringify(object, null, '    '));
});

console.log(object);

The first console log outputs the correct JSON like

{ id: 'ddeklj' } .

But the second console log outputs is undefined .

My question is: How can I get the variables object from the function?

Answer 1

It looks like you are using AliCloud Function Compute and are trying to get the value of the body from the http request.

AliCloud's functions send the body in as a buffer and their example code that you are referencing is a bit confusing. You can extract the body from the req by doing something like this :

var getRawBody = require('raw-body');
module.exports.handler = async function (req, resp, context) {

  var getBody = await getRawBody(req);
  var bodyToString = getBody.toString();

  console.log(bodyToString );
}

Answer 2

Declare Variable outside the function, and then initialize it inside the function

let a;
Function getData(){
a = 20;
}
getData();
console.log(a);