/Javascript/Express/Constantly send a request until a desired response is recieved expressjs

Constantly send a request until a desired response is recieved expressjs

// your callback gets executed automatically once the data is received
var callback = (data, error) => {
    // consume data
    if (error) {
        console.error(error);
        return;
    }
    console.log(data);
};

// run the request. this function will call itself max. 5 times if the request fails
request(5, callback);

function request(var retries, var callback) {
    axios.post('http://localhost:2000/evaluate', {
        serviceName:"s1"
    }).then(response => {
        // request successful

        if(response.data['done'] == 1) {
            // server done, deliver data to script to consume
            callback(response);
        }
        else {
            // server not done yet
            // retry, if any retries left
            if (retries > 0) {
                request(--retries, callback);
            }
            else {
                // no retries left, calling callback with error
                callback([], "out of retries");
            }
        }
    }).catch(error => {
        // ajax error occurred
        // would be better to not retry on 404, 500 and other unrecoverable HTTP errors
        // retry, if any retries left
        if (retries > 0) {
            request(--retries, callback);
        }
        else {
            // no retries left, calling callback with error
            callback([], error);
        }
    });
}

Source: stackoverflow.com

Similar codes

1 vote130 views1 answer
Javascript express app listen
Javascript Express
1 vote132 views1 answer
Ngingx proxy express get real ip
Javascript Express
32 votes110 views4 answers
Setup express with typescript
Javascript Express
0 vote131 views1 answer
Express pearl ship
Javascript Express
0 vote125 views1 answer
TypeError:Cannot read property 'reviews' of null express
Javascript Express
2 votes132 views2 answers
Express check if object is empty
Javascript Express
-1 vote105 views1 answer
Express hot reload
Javascript Express
-1 vote148 views1 answer
Express static page
Javascript Express
0 vote186 views1 answer
Programação web com Node e Express Beneficiando-se da stack JavaScript
Javascript Express
0 vote138 views1 answer
How to use vue.js in expressjs with pug
Javascript Express