feat(http): ability to easily override host header to http(s) proxy t…

…arget

symptom/http_tamperer.go

@@ -22,6 +22,7 @@ type RequestConfig struct {
 	Cookies []http.Cookie
 	Body    string
 	Path    string
+	Host    string
 }
 
 // ResponseConfig contains details of the HTTP response to tamper with prior to
@@ -96,6 +97,12 @@ func (m *HTTPTampererSymptom) MuckRequest(ctx *muxy.Context) {
 		ctx.Request.URL.Path = m.Request.Path
 	}
 
+	// Host
+	if m.Request.Host != "" {
+		log.Debug("HTTP Tamperer Spoofing HTTP Host from [%s] to [%s]", ctx.Request.URL.Host, log.Colorize(log.BLUE, m.Request.Host))
+		ctx.Request.Host = m.Request.Host
+	}
+
 	// Body
 	if m.Request.Body != "" {
 		newreq, err := http.NewRequest(ctx.Request.Method, ctx.Request.URL.String(), bytes.NewBuffer([]byte(m.Request.Body)))