prepare 5.12.0 release (#181)

configuration.js

@@ -9,6 +9,7 @@ module.exports = (function() {
       streamUri: 'https://stream.launchdarkly.com',
       eventsUri: 'https://events.launchdarkly.com',
       stream: true,
+      streamInitialReconnectDelayMillis: 1000,
       sendEvents: true,
       timeout: 5,
       capacity: 10000,

index.d.ts

@@ -306,6 +306,17 @@ declare module 'launchdarkly-node-server-sdk' {
      */
     stream?: boolean;
 
+    /**
+     * Sets the initial reconnect delay for the streaming connection, in milliseconds.
+     *
+     * The streaming service uses a backoff algorithm (with jitter) every time the connection needs
+     * to be reestablished. The delay for the first reconnection will start near this value, and then
+     * increase exponentially for any subsequent connection failures.
+     *
+     * The default value is 1000.
+     */
+    streamInitialReconnectDelayMillis?: number;
+
     /**
      * Whether you are using the LaunchDarkly relay proxy in daemon mode.
      *

messages.js

@@ -2,14 +2,16 @@ const errors = require('./errors');
 
 exports.deprecated = (oldName, newName) => '"' + oldName + '" is deprecated, please use "' + newName + '"';
 
-exports.httpErrorMessage = (status, context, retryMessage) =>
-  'Received error ' +
-  status +
-  (status === 401 ? ' (invalid SDK key)' : '') +
-  ' for ' +
-  context +
-  ' - ' +
-  (errors.isHttpErrorRecoverable(status) ? retryMessage : 'giving up permanently');
+exports.httpErrorMessage = (status, context, retryMessage) => {
+  let desc;
+  if (status) {
+    desc = 'error ' + status + (status === 401 ? ' (invalid SDK key)' : '');
+  } else {
+    desc = 'I/O error';
+  }
+  const action = errors.isHttpErrorRecoverable(status) ? retryMessage : 'giving up permanently';
+  return 'Received ' + desc + ' for ' + context + ' - ' + action;
+};
 
 exports.missingUserKeyNoEvent = () => 'User was unspecified or had no key; event will not be sent';