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consul/ui/packages/consul-ui/app/utils/get-environment.js

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import { runInDebug } from '@ember/debug';
// 'environment' getter
// there are currently 3 levels of environment variables:
// 1. Those that can be set by the user by setting localStorage values
// 2. Those that can be set by the operator either via ui_config, or inferring
// from other server type properties (protocol)
// 3. Those that can be set only during development by adding cookie values
// via the browsers Web Inspector, or via the browsers hash (#COOKIE_NAME=1),
// which is useful for showing the UI with various settings enabled/disabled
export default function(config = {}, win = window, doc = document) {
// look at the hash in the URL and transfer anything after the hash into
// cookies to enable linking of the UI with various settings enabled
runInDebug(() => {
const cookies = function(str) {
return str
.split(';')
.map(item => item.trim())
.filter(item => item !== '')
.filter(item =>
item
.split('=')
.shift()
.startsWith('CONSUL_')
);
};
win.Scenario = function(str = '') {
if (str.length > 0) {
cookies(str).forEach(item => (doc.cookie = `${item};Path=/`));
win.location.hash = '';
location.reload();
} else {
str = cookies(doc.cookie).join(';');
const tab = win.open('', '_blank');
tab.document.write(
`<body><pre>${location.href}#${str}</pre><br /><a href="javascript:Scenario('${str}')">Scenario</a></body>`
);
}
};
if (
typeof win.location !== 'undefined' &&
typeof win.location.hash === 'string' &&
win.location.hash.length > 0
) {
win.Scenario(win.location.hash.substr(1));
}
});
const dev = function(str = doc.cookie) {
return str
.split(';')
.filter(item => item !== '')
.map(item => {
const [key, ...rest] = item.trim().split('=');
return [key, rest.join('=')];
});
};
const user = function(str) {
const item = win.localStorage.getItem(str);
return item === null ? undefined : item;
};
const getResourceFor = function(src) {
try {
return (
win.performance.getEntriesByType('resource').find(item => {
return item.initiatorType === 'script' && src === item.name;
}) || {}
);
} catch (e) {
return {};
}
};
const operatorConfig = JSON.parse(
doc.querySelector(`[data-${config.modulePrefix}-config]`).textContent
);
const ui_config = operatorConfig.UIConfig || {};
const scripts = doc.getElementsByTagName('script');
// we use the currently executing script as a reference
// to figure out where we are for other things such as
// base url, api url etc
const currentSrc = scripts[scripts.length - 1].src;
let resource;
// TODO: Potentially use ui_config {}, for example
// turning off blocking queries if its a busy cluster
// forcing/providing amount of possible HTTP connections
// re-setting the base url for the API etc
const operator = function(str, env) {
let protocol, dashboards, provider, proxy;
switch (str) {
case 'CONSUL_NSPACES_ENABLED':
return typeof operatorConfig.NamespacesEnabled === 'undefined'
? false
: operatorConfig.NamespacesEnabled;
case 'CONSUL_SSO_ENABLED':
return typeof operatorConfig.SSOEnabled === 'undefined' ? false : operatorConfig.SSOEnabled;
case 'CONSUL_ACLS_ENABLED':
return typeof operatorConfig.ACLsEnabled === 'undefined'
? false
: operatorConfig.ACLsEnabled;
case 'CONSUL_PARTITIONS_ENABLED':
return typeof operatorConfig.PartitionsEnabled === 'undefined'
? false
: operatorConfig.PartitionsEnabled;
case 'CONSUL_DATACENTER_LOCAL':
return operatorConfig.LocalDatacenter;
case 'CONSUL_UI_CONFIG':
dashboards = {};
provider = env('CONSUL_METRICS_PROVIDER');
proxy = env('CONSUL_METRICS_PROXY_ENABLED');
dashboards.service = env('CONSUL_SERVICE_DASHBOARD_URL');
if (provider) {
ui_config.metrics_provider = provider;
}
if (proxy) {
ui_config.metrics_proxy_enabled = proxy;
}
if (dashboards.service) {
ui_config.dashboard_url_templates = dashboards;
}
return ui_config;
case 'CONSUL_BASE_UI_URL':
return currentSrc
.split('/')
.slice(0, -2)
.join('/');
case 'CONSUL_HTTP_PROTOCOL':
if (typeof resource === 'undefined') {
// resource needs to be retrieved lazily as entries aren't guaranteed
// to be available at script execution time (caching seems to affect this)
// waiting until we retrieve this value lazily at runtime means that
// the entries are always available as these values are only retrieved
// after initialization
// current is based on the assumption that whereever this script is it's
// likely to be the same as the xmlhttprequests
resource = getResourceFor(currentSrc);
}
return resource.nextHopProtocol || 'http/1.1';
case 'CONSUL_HTTP_MAX_CONNECTIONS':
protocol = env('CONSUL_HTTP_PROTOCOL');
// http/2, http2+QUIC/39 and SPDY don't have connection limits
switch (true) {
case protocol.indexOf('h2') === 0:
case protocol.indexOf('hq') === 0:
case protocol.indexOf('spdy') === 0:
// TODO: Change this to return -1 so we try to consistently
// return a value from env vars
return;
default:
// generally 6 are available
// reserve 1 for traffic that we can't manage
return 5;
}
}
};
const ui = function(key) {
let $;
switch (config.environment) {
case 'development':
case 'staging':
case 'coverage':
case 'test':
$ = dev().reduce(function(prev, [key, value]) {
switch (key) {
case 'CONSUL_INTL_LOCALE':
prev['CONSUL_INTL_LOCALE'] = String(value).toLowerCase();
break;
case 'CONSUL_INTL_DEBUG':
prev['CONSUL_INTL_DEBUG'] = !!JSON.parse(String(value).toLowerCase());
break;
case 'CONSUL_ACLS_ENABLE':
prev['CONSUL_ACLS_ENABLED'] = !!JSON.parse(String(value).toLowerCase());
break;
case 'CONSUL_NSPACES_ENABLE':
prev['CONSUL_NSPACES_ENABLED'] = !!JSON.parse(String(value).toLowerCase());
break;
case 'CONSUL_SSO_ENABLE':
prev['CONSUL_SSO_ENABLED'] = !!JSON.parse(String(value).toLowerCase());
break;
case 'CONSUL_PARTITIONS_ENABLE':
prev['CONSUL_PARTITIONS_ENABLED'] = !!JSON.parse(String(value).toLowerCase());
break;
case 'CONSUL_METRICS_PROXY_ENABLE':
prev['CONSUL_METRICS_PROXY_ENABLED'] = !!JSON.parse(String(value).toLowerCase());
break;
case 'CONSUL_UI_CONFIG':
prev['CONSUL_UI_CONFIG'] = JSON.parse(value);
break;
default:
prev[key] = value;
}
return prev;
}, {});
if (typeof $[key] !== 'undefined') {
return $[key];
}
break;
}
return config[key];
};
return function env(str) {
switch (str) {
// All user providable values should start with CONSUL_UI
// We allow the user to set these ones via localStorage
// user value is preferred.
case 'CONSUL_UI_DISABLE_REALTIME':
case 'CONSUL_UI_DISABLE_ANCHOR_SELECTION':
// these are booleans cast things out
return !!JSON.parse(String(user(str) || 0).toLowerCase()) || ui(str);
case 'CONSUL_UI_REALTIME_RUNNER':
// these are strings
return user(str) || ui(str);
case 'CONSUL_UI_CONFIG':
case 'CONSUL_DATACENTER_LOCAL':
case 'CONSUL_ACLS_ENABLED':
case 'CONSUL_NSPACES_ENABLED':
case 'CONSUL_SSO_ENABLED':
case 'CONSUL_PARTITIONS_ENABLED':
case 'CONSUL_METRICS_PROVIDER':
case 'CONSUL_METRICS_PROXY_ENABLE':
case 'CONSUL_SERVICE_DASHBOARD_URL':
case 'CONSUL_BASE_UI_URL':
case 'CONSUL_HTTP_PROTOCOL':
case 'CONSUL_HTTP_MAX_CONNECTIONS':
// We allow the operator to set these ones via various methods
// although UI developer config is preferred
return ui(str) || operator(str, env);
default:
return ui(str);
}
};
}
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