net: Use older api for Node 6

.github/workflows/test.yml

@@ -19,6 +19,7 @@ jobs:
     strategy:
       matrix:
         include:
+        - { node: 6 , os: ubuntu-latest,  arch: x64 }
         - { node: 8,  os: windows-latest, arch: x86 }
         - { node: 12, os: macos-latest,   arch: x64 }
         - { node: 16, os: ubuntu-latest,  arch: x64 }

net.js

@@ -79,22 +79,27 @@ XMLHttpRequest.prototype = {
 	send: function (data) {
 		var xhr = this
 		, url = new URL(xhr.responseURL, XMLHttpRequest.base)
+		, proto = url.protocol.slice(0, -1)
 
-		if (url.protocol === "http:" || url.protocol === "https:") {
-			url.method = xhr.method
-			url.headers = Object.keys(xhr._reqHeaders).reduce(function(result, key) {
-				var entrie = xhr._reqHeaders[key]
-				result[entrie[0]] = entrie[1]
-				return result
-			}, {})
-			require(url.protocol.slice(0, -1)).request(url, function(res) {
+		if (proto === "http" || proto === "https") {
+			require(proto).request({
+				method: xhr.method,
+				host: url.host,
+				port: url.port,
+				path: url.path,
+				headers: Object.keys(xhr._reqHeaders).reduce(function(result, key) {
+					var entrie = xhr._reqHeaders[key]
+					result[entrie[0]] = entrie[1]
+					return result
+				}, {})
+			}, function(res) {
 				head(res.statusCode, res.statusMessage, res.headers)
 				res.on("data", fillBody)
 				res.on("end", done)
 			}).end(data)
 			return
 		}
-		if (url.protocol === "data:") {
+		if (proto === "data") {
 			var match = dataUrlRe.exec(url.pathname)
 			if (!match) throw Error("Invalid URL: " + url)
 			process.nextTick(function() {
@@ -104,9 +109,8 @@ XMLHttpRequest.prototype = {
 			})
 			return
 		}
-
-		if (url.protocol === "file:") {
-			require("fs").readFile(url, function(err, chunk) {
+		if (proto === "file") {
+			require("fs").readFile(url.pathname, function(err, chunk) {
 				if (err) {
 					head(404, "Not Found", {})
 				} else {