获取反应应用程序中的调用不返回正文，相同的调用适用于 postman

Question

I have a React app running in localhost and backend REST APIs running in localhost. When I try to make a POST call to REST API, the call is successful. But the body in empty.

The sample code can be found below.

const body = await fetch("url", {
            method : 'POST',
            headers: {
                "Accept" : "application/json",
                "Content-Type" : "application/json"
            },
            body: JSON.stringify(comp)
        }).then((res) => { 
            console.log(res);
        }).then(data => console.log(data));

Call is successful. res looks like: returned object

Same code works fine in Postman. Also all the GET API calls work fine from the same react app.

Answer 1

Two problems

1. You don't return anything in the first then() and
2. You need to use res.json() promise to access the data.

try something like:

const req = await fetch("url", {
            method : 'POST',
            headers: {
                "Accept" : "application/json",
                "Content-Type" : "application/json"
            },
            body: JSON.stringify(comp)
        });

const data = await req.json();

console.log(data)