Update src/http.ps1

src/http.ps1

@@ -1,8 +1,8 @@
 function Send-Text {
     param($Context, $Text)
     if (-not $Context -or -not $Context.Response) { return }
-    $bytes = [Text.Encoding]::UTF8.GetBytes($Text)
-    $Context.Response.ContentType     = 'text/plain'
+    $bytes = [Text.Encoding]::UTF8.GetBytes([string]$Text)
+    $Context.Response.ContentType     = 'text/plain; charset=utf-8'
     $Context.Response.ContentLength64 = $bytes.Length
     $Context.Response.OutputStream.Write($bytes,0,$bytes.Length)
     $Context.Response.OutputStream.Close()
@@ -30,6 +30,73 @@ function Send-HTML {
     $Context.Response.OutputStream.Close()
 }
 
+function Send-RemoteAsset {
+    [CmdletBinding()]
+    param(
+        [Parameter(Mandatory)][object] $Context,
+        [Parameter(Mandatory)][string] $Url,
+        [Parameter(Mandatory)][string] $ContentType
+    )
+
+    if (-not $Context -or -not $Context.Response) { return }
+
+    if ([string]::IsNullOrWhiteSpace($Url)) {
+        try {
+            $Context.Response.StatusCode = 500
+        } catch { }
+        Send-Text $Context "Asset URL is empty (ContentType=$ContentType)"
+        return
+    }
+
+    try {
+        $resp = Invoke-WebRequest -UseBasicParsing -Uri $Url -ErrorAction Stop
+
+        try {
+            $Context.Response.Headers["Cache-Control"] = "no-store, no-cache, must-revalidate, max-age=0"
+            $Context.Response.Headers["Pragma"]        = "no-cache"
+            $Context.Response.Headers["Expires"]       = "0"
+        } catch { }
+
+        $Context.Response.ContentType = $ContentType
+
+        # Prefer binary stream for images/icons. For js/css/html, treat as UTF-8 text.
+        $bytes = $null
+
+        if ($ContentType -like 'image/*' -or $ContentType -like '*x-icon*' -or $ContentType -like '*octet-stream*') {
+            try {
+                $ms = New-Object System.IO.MemoryStream
+                $resp.RawContentStream.CopyTo($ms)
+                $bytes = $ms.ToArray()
+            }
+            catch {
+                # Fallback: treat as text if RawContentStream isn't usable
+                $bytes = [Text.Encoding]::UTF8.GetBytes([string]$resp.Content)
+            }
+        }
+        else {
+            $bytes = [Text.Encoding]::UTF8.GetBytes([string]$resp.Content)
+        }
+
+        $Context.Response.ContentLength64 = $bytes.Length
+        $Context.Response.OutputStream.Write($bytes, 0, $bytes.Length)
+    }
+    catch {
+        Write-LogHybrid "Send-RemoteAsset failed for $Url : $($_.Exception.Message)" Error Server -LogToEvent
+
+        try {
+            $Context.Response.StatusCode = 502
+            $msg = "Failed to fetch asset: $Url"
+            $bytes = [Text.Encoding]::UTF8.GetBytes($msg)
+            $Context.Response.ContentType     = "text/plain; charset=utf-8"
+            $Context.Response.ContentLength64 = $bytes.Length
+            $Context.Response.OutputStream.Write($bytes, 0, $bytes.Length)
+        } catch { }
+    }
+    finally {
+        try { $Context.Response.OutputStream.Close() } catch { }
+    }
+}
+
 function Send-JSON {
     [CmdletBinding()]
     param(