fix(install): fallback to default downloader when aria2 fails

Author: kiennq

lib/download.ps1

@@ -138,7 +138,7 @@ function Invoke-Download ($url, $to, $cookies, $progress) {
         # Handle manual file rename
         if ($url -like '*#/*') {
             $null, $postfix = $url -split '#/'
-            $newUrl = "$newUrl#/$postfix"
+            $newUrl = "$newUrl`#/$postfix"
         }
 
         Invoke-Download $newUrl $to $cookies $progress
@@ -454,10 +454,21 @@ function Invoke-CachedAria2Download ($app, $version, $manifest, $architecture, $
         Write-Host ''
 
         if ($lastexitcode -gt 0) {
-            error "Download failed! (Error $lastexitcode) $(aria_exit_code $lastexitcode)"
-            error $urlstxt_content
-            error $aria2
-            abort $(new_issue_msg $app $bucket 'download via aria2 failed')
+            warn "Download failed! (Error $lastexitcode) $(aria_exit_code $lastexitcode)"
+            warn $urlstxt_content
+            warn $aria2
+            warn $(new_issue_msg $app $bucket "download via aria2 failed")
+
+            Write-Host "Fallback to default downloader ..."
+
+            try {
+                foreach ($url in $urls) {
+                    Invoke-CachedDownload $app $version $url "$($data.$url.target)" $cookies $use_cache
+                }
+            } catch {
+                write-host -f darkred $_
+                abort "URL $url is not valid"
+            }
         }
 
         # remove aria2 input file when done