Add request interception handler

Adds a handler for requests, allow for more fine grained control over paths / url access.

• --blockLocal blocks local requests (automatic for remote html pages)
• --blockRemote blocks remote requests
• --allowedPath allows a specific local path (highly recommended for servers)
• --allowedDomain block access to remote files other than at a specific domain (i.e. google fonts domain)

bin/paged

@@ -26,6 +26,9 @@ program
   .option("-t, --timeout [ms]", "Set a max timeout of [ms]")
   .option("-x, --html", "output html file")
   .option("-b, --blockLocal", "Disallow access to filesystem for local files")
+  .option("-r, --blockRemote", "Disallow requests to remote servers")
+  .option("--allowedPath [allowedPaths]", "Only allow access to given filesystem paths, repeatable.", collect, [])
+  .option("--allowedDomain [allowedDomains]", "Only allow access to given remote domains, repeatable", collect, [])
   .option("--outline-tags [tags]", "Specifies that an outline should be " +
           "generated for the resulting PDF document. [tags] specifies which " +
           "HTML tags should be considered for that outline. " +
@@ -35,13 +38,13 @@ program
           "added to the HTML document before rendering. This is useful for " +
           "adding custom pagedjs handlers. The option can be repeated.",
           collect, [])
+  .option("--browserEndpoint", "Use a remote Chrome server with browserWSEndpoint")
   .parse(process.argv);
 
 function collect(value, previous) {
   return previous.concat(value);
 }
 
-
 let input = program.inputs || program.args[0];
 
 let dir = process.cwd();
@@ -49,7 +52,7 @@ let dir = process.cwd();
 let relativePath;
 let allowLocal;
 try {
-  input = new URL(input);
+  let uri = new URL(input);
   allowLocal = false;
 } catch (error) {
   relativePath = path.resolve(dir, input);
@@ -104,7 +107,14 @@ if (typeof input === "string") {
 }
 
 (async () => {
-  let printer = new Printer(headless, allowLocal, program.additionalScript);
+  let printer = new Printer({
+    headless: headless,
+    allowLocal: allowLocal,
+    allowRemote: !program.blockRemote,
+    allowedPaths: program.allowedPaths,
+    allowedDomains: program.allowedDomains,
+    additionalScripts: program.additionalScript,
+  });
 
   printer.on("page", (page) => {
     if (page.position === 0) {