Add error handling for /session request

lib/strategy.js

@@ -42,6 +42,12 @@ function Strategy(options, verify) {
   this._verify = verify
   this._url = options.url
   this._passReqToCallback = options.passReqToCallback
+  // Add logging via a "logger" object with logging methods
+  this._logger = options.logger || {
+    log: () => {},
+    warn: () => {},
+    error: () => {},
+  }
 }
 
 /**
@@ -60,7 +66,9 @@ Strategy.prototype.authenticate = async function(req, options) {
   options = options || {}
   const url = options.url || this._url
   if (!url) {
-    return this.fail({ message: "Missing API URL" }, 400)
+    const message = "EasyDB error: Missing API URL"
+    this._logger.error(message)
+    return this.fail({ message }, 400)
   }
 
   let username = (req.body && req.body.username) || req.query.username
@@ -70,9 +78,19 @@ Strategy.prototype.authenticate = async function(req, options) {
   }
 
   // Step 1: Start new session
-  const session = await axios.get(`${url}session`)
+  let session
+  try {
+    session = await axios.get(`${url}session`)
+  } catch (error) {
+    session = {
+      status: 503,
+      statusText: error.message,
+    }
+  }
   if (session.status != 200) {
-    return this.fail({ message: "Error on /session request: " + session.statusText }, session.status)
+    const message = `EasyDB error on /session request: ${session.statusText}`
+    this._logger.error(message)
+    return this.fail({ message }, session.status)
   }
   // Result: Session token
   const token = session.data.token