Allow setting a custom user agent.

feed.go

@@ -104,6 +104,9 @@ type Feed struct {
 	// On our next fetch *ONLY* (this will get reset to false afterwards),
 	// ignore all cache settings and update frequency hints, and always fetch.
 	ignoreCacheOnce bool
+
+	// Custom user agent
+	userAgent string
 }
 
 // New is a helper function to stay semi-compatible with
@@ -171,6 +174,10 @@ func (this *Feed) FetchClient(uri string, client *http.Client, charset xmlx.Char
 	this.Url = uri
 	doc := xmlx.New()
 
+	if len(this.userAgent) > 1 {
+		doc.SetUserAgent(this.userAgent)
+	}
+
 	if err = doc.LoadUriClient(uri, client, charset); err != nil {
 		return
 	}
@@ -358,3 +365,7 @@ func (this *Feed) GetVersionInfo(doc *xmlx.Document) (ftype string, fversion [2]
 	fversion = [2]int{0, 0}
 	return
 }
+
+func (this *Feed) SetUserAgent(s string) {
+	this.userAgent = s
+}