Add support of HTTP_PROXY and http_proxy

Author: llaumgui

lib/W3CValidator.js

@@ -35,6 +35,7 @@ var W3CValidator = function(url, java_home) {
     this.invalid = 0;
     this.JAVA_HOME = java_home;
     this.logData = "";
+    this.httpProxy = false;
 
     this.uri = new URL(url);
     this.crawler = new Crawler(this.uri.host);
@@ -54,6 +55,20 @@ var W3CValidator = function(url, java_home) {
         this.uri.set("protocol", "http:");
     }
 
+    // Get proxy
+    if (process.env.HTTP_PROXY !== undefined) {
+        this.httpProxy = URL(process.env.HTTP_PROXY);
+    } else if (process.env.http_proxy !== undefined) {
+        this.httpProxy = URL(process.env.http_proxy);
+    }
+
+    // Set Crawler proxy
+    if (this.httpProxy !== false) {
+        this.crawler.useProxy = true;
+        this.crawler.proxyHostname = this.httpProxy.hostname;
+        this.crawler.proxyPort = this.httpProxy.port;
+    }
+
     this.crawler.initialProtocol = this.uri.protocol.replace(":", "");
     this.crawler.userAgent = "Node/W3CValidator";
 
@@ -75,12 +90,20 @@ var W3CValidator = function(url, java_home) {
 
 W3CValidator.prototype.checkURL = function() {
     var url = this.chunk.pop();
+    var javaOpts = ""
+
+    // Set JAVA Proxy
+    if (this.httpProxy !== false) {
+        javaOpts += `-Dhttp.proxyHost=${this.httpProxy.hostname} -Dhttp.proxyPort=${this.httpProxy.port}`
+    }
 
     var spinner = new Spinner(`  ${url} %s`);
     spinner.start();
 
+
+
     var vnuPath = path.join(__dirname, "../vnu/vnu.jar").replace(/\s/g, "\\ ");
-    var child = exec(`java -jar ${vnuPath} --format json ${url}`, { env: { JAVA_HOME: this.JAVA_HOME }}, (error, stdout, stderr) => {
+    var child = exec(`java ${javaOpts} -jar ${vnuPath} --format json ${url}`, { env: { JAVA_HOME: this.JAVA_HOME }}, (error, stdout, stderr) => {
         var errors = JSON.parse(stderr);
 
         spinner.stop(true);