From 434aea44a0bac3f75a7b9f24db167436952370b1 Mon Sep 17 00:00:00 2001
From: evshiron <evshiron@gmail.com>
Date: Mon, 21 Aug 2017 14:53:05 +0800
Subject: [PATCH] fix(Downloaders): tolerate DNS lookup timeout and use caches

---
 src/lib/Downloader.ts       | 9 +++++++++
 src/lib/FFmpegDownloader.ts | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/lib/Downloader.ts b/src/lib/Downloader.ts
index c0584a1..82644f7 100644
--- a/src/lib/Downloader.ts
+++ b/src/lib/Downloader.ts
@@ -67,12 +67,21 @@ export class Downloader extends DownloaderBase {
             }
         }
         catch(err) {
+
+            debug('in fetch', 'err', err);
+
             if(err.code === 'ENOTFOUND' && this.options.useCaches) {
+                console.info('DNS lookup fails, use local caches at this time.');
+                return path;
+            }
+            else if(err.code === 'EAI_AGAIN' && this.options.useCaches) {
+                console.info('DNS lookup timeout, use local caches at this time.');
                 return path;
             }
             else {
                 throw err;
             }
+
         }
 
         await this.download(url, filename, path, showProgress);
diff --git a/src/lib/FFmpegDownloader.ts b/src/lib/FFmpegDownloader.ts
index c39e2a6..fe03ea4 100644
--- a/src/lib/FFmpegDownloader.ts
+++ b/src/lib/FFmpegDownloader.ts
@@ -76,12 +76,21 @@ export class FFmpegDownloader extends DownloaderBase {
             }
         }
         catch(err) {
+
+            debug('in fetch', 'err', err);
+
             if(err.code === 'ENOTFOUND' && this.options.useCaches) {
+                console.info('DNS lookup fails, use local caches at this time.');
+                return path;
+            }
+            else if(err.code === 'EAI_AGAIN' && this.options.useCaches) {
+                console.info('DNS lookup timeout, use local caches at this time.');
                 return path;
             }
             else {
                 throw err;
             }
+
         }
 
         await this.download(url, filename, path, showProgress);