Perform download url check with HTTP headers from chocolateyInstall.ps1

AU/Private/check_url.ps1

@@ -1,10 +1,10 @@
 # Returns nothing if url is valid, error otherwise
-function check_url( [string] $Url, [int]$Timeout, $ExcludeType='text/html' ) {
+function check_url( [string] $Url, [int]$Timeout, $ExcludeType='text/html', $Options ) {
     if (!(is_url $Url)) { return "URL syntax is invalid" }
 
     try
     {
-        $response = request $url $Timeout
+        $response = request $url $Timeout -Options $Options
         if ($response.ContentType -like "*${ExcludeType}*") { return "Bad content type '$ExcludeType'" }
     }
     catch {

AU/Private/request.ps1

@@ -1,7 +1,8 @@
-function request( [string]$Url, [int]$Timeout ) {
+function request( [string]$Url, [int]$Timeout, $Options ) {
     if ([string]::IsNullOrWhiteSpace($url)) {throw 'The URL is empty'}
     $request = [System.Net.WebRequest]::Create($Url)
     if ($Timeout)  { $request.Timeout = $Timeout*1000 }
+    if ($Options.Headers) { $Options.Headers.Keys | %{ $request.Headers.add($_, $Options.Headers[$_]) } }
 
     $response = $request.GetResponse()
     $response.Close()

AU/Public/Update-Package.ps1

@@ -107,7 +107,7 @@ function Update-Package {
         "URL check" | result
         $Latest.Keys | ? {$_ -like 'url*' } | % {
             $url = $Latest[ $_ ]
-            if ($res = check_url $url) { throw "${res}:$url" } else { "  $url" | result }
+            if ($res = check_url $url -Options $Latest.Options) { throw "${res}:$url" } else { "  $url" | result }
         }
     }
 

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Next
 - Git plugin: add `Branch` parameter to specify a branch name
+- `Update-Package`: Now you can pass HTTP/HTTPS headers to `$Latest.Options.Headers` to avoid `Unauthorized` errors while checking URLs.
 
 ### Bugfixes
 

README.md

@@ -516,6 +516,16 @@ RepeatCount   = 2                                  #How many times to repeat on
 - If the same error is both in `RepeatOn` and `IgnoreOn` list, the package will first be repeated and if the error persists, it will be ignored.
 - The last line returned by the package prior to the word 'ignore' is used as `IgnoreMessage` for that package and shown in reports.
 
+##### Can't validate URL error
+
+If you encounter `Can't validate URL` error like
+
+```bash
+Can't validate URL
+Exception calling "GetResponse" with "0" argument(s): "The remote server returned an error: (401) Unauthorized.":<url>
+```
+
+you need to pass HTTP/HTTPS headers used for retreiving `url`/`url64bit` to `$Latest.Options.Headers` as `Hashtable`, where key is header name, and value are header itself. This may be `Authorization` or `Referer` header or any others.
 
 ## Other functions