only set header if not already sent (#46)

edsilv · Joe Hand · commit 3fcdbc325b15 · 2018-11-14T14:42:22.000-08:00
diff --git a/index.js b/index.js
@@ -146,7 +146,9 @@ function waitFor (archive, until, cb) { // this feels a bit hacky, TODO: make le
 
 function onerror (res, status, err) {
   res.statusCode = status
-  res.setHeader('Content-Type', 'text/plain; charset=utf-8')
+  if (!res.headersSent) {
+    res.setHeader('Content-Type', 'text/plain; charset=utf-8')
+  }
   res.end(err.stack)
 }
 

Original file line number	Diff line number	Diff line change
`@@ -146,7 +146,9 @@ function waitFor (archive, until, cb) { // this feels a bit hacky, TODO: make le`
`146`	`146`
`147`	`147`	`function onerror (res, status, err) {`
`148`	`148`	`res.statusCode = status`
`149`		`- res.setHeader('Content-Type', 'text/plain; charset=utf-8')`
	`149`	`+ if (!res.headersSent) {`
	`150`	`+ res.setHeader('Content-Type', 'text/plain; charset=utf-8')`
	`151`	`+ }`
`150`	`152`	`res.end(err.stack)`
`151`	`153`	`}`
`152`	`154`