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Adjust the checkIfOnline check if in a corporate proxy environment #2884

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merged 2 commits into from
Aug 9, 2017
Merged

Adjust the checkIfOnline check if in a corporate proxy environment #2884

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235739e
Adjust the `checkIfOnline` check if in a corporate proxy environment
bsyk Aug 2, 2017
99c4ab1
Adjust to check yarnpkg.com first, then check the proxy address only …
bsyk Aug 6, 2017
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11 changes: 10 additions & 1 deletion packages/create-react-app/createReactApp.js
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ const semver = require('semver');
const dns = require('dns');
const tmp = require('tmp');
const unpack = require('tar-pack').unpack;
const url = require('url');
const hyperquest = require('hyperquest');

const packageJson = require('./package.json');
Expand Down Expand Up @@ -614,7 +615,15 @@ function checkIfOnline(useYarn) {

return new Promise(resolve => {
dns.lookup('registry.yarnpkg.com', err => {
resolve(err === null);
if (err != null && process.env.https_proxy) {
// If a proxy is defined, we likely can't resolve external hostnames.
// Try to resolve the proxy name as an indication of a connection.
dns.lookup(url.parse(process.env.https_proxy).hostname, proxyErr => {
resolve(proxyErr == null);
});
} else {
resolve(err == null);
}
});
});
}