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ServerHandler.js
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ServerHandler.js
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const http = require('http');
class ServerHandler {
constructor(servers) {
this.servers = servers;
this.lastServerIndex = 0;
}
respond(response) {
const server = this.getServer();
http.get(`${server}/health`, (res) => {
if (res.statusCode === 200) {
makeGetRequest(server, response)
} else {
this.respond(response);
}
}).on('error', (e) => {
this.respond(response);
console.error(`Got error: ${e.message}`);
});
}
addResponder(server) {
console.log(server, "================")
}
getServer() {
const server = this.servers[this.lastServerIndex++];
if (this.lastServerIndex >= this.servers.length) this.lastServerIndex = 0;
return server;
};
}
const makeGetRequest = (url, response) => {
console.log("request for server", url)
http.get(url, (res) => {
let rawData = '';
res.on('data', (chunk) => { rawData += chunk; });
res.on('end', () => {
try {
const parsedData = JSON.parse(rawData);
response.send(parsedData);
} catch (e) {
console.error(e.message);
response.send(e.message);
}
});
}).on('error', (e) => {
response.send(e.message);
console.error(`Got error: ${e.message}`);
});
}
module.exports = ServerHandler;