WIP

packages/safe-chain/src/environment/userInteraction.js

@@ -26,6 +26,10 @@ function writeError(message, ...optionalParams) {
   console.error(message, ...optionalParams);
 }
 
+function writeVerboseInformation(message, ...optionalParams) {
+  writeInformation(message, ...optionalParams);
+}
+
 function startProcess(message) {
   if (isCi()) {
     return {
@@ -89,6 +93,7 @@ async function confirm(config) {
 
 export const ui = {
   writeInformation,
+  writeVerboseInformation,
   writeWarning,
   writeError,
   emptyLine,

packages/safe-chain/src/registryProxy/mitmRequestHandler.js

@@ -1,11 +1,16 @@
 import https from "https";
 import { generateCertForHost } from "./certUtils.js";
 import { HttpsProxyAgent } from "https-proxy-agent";
+import { ui } from "../environment/userInteraction.js";
 
 export function mitmConnect(req, clientSocket, isAllowed) {
+  ui.writeVerboseInformation(`Safe-chain: Set up MITM tunnel for ${req.url}`);
   const { hostname } = new URL(`http://${req.url}`);
 
-  clientSocket.on("error", () => {
+  clientSocket.on("error", (err) => {
+    ui.writeVerboseInformation(
+      `Safe-chain: Client socket error for ${req.url}: ${err.message}`
+    );
     // NO-OP
     // This can happen if the client TCP socket sends RST instead of FIN.
     // Not subscribing to 'close' event will cause node to throw and crash.
@@ -28,6 +33,9 @@ function createHttpsServer(hostname, isAllowed) {
     const targetUrl = `https://${hostname}${pathAndQuery}`;
 
     if (!(await isAllowed(targetUrl))) {
+      ui.writeVerboseInformation(
+        `Safe-chain: Blocking request to ${targetUrl}`
+      );
       res.writeHead(403, "Forbidden - blocked by safe-chain");
       res.end("Blocked by safe-chain");
       return;
@@ -57,7 +65,10 @@ function getRequestPathAndQuery(url) {
 function forwardRequest(req, hostname, res) {
   const proxyReq = createProxyRequest(hostname, req, res);
 
-  proxyReq.on("error", () => {
+  proxyReq.on("error", (err) => {
+    ui.writeVerboseInformation(
+      `Safe-chain: Error occurred while proxying request: ${err.message}`
+    );
     res.writeHead(502);
     res.end("Bad Gateway");
   });
@@ -67,6 +78,9 @@ function forwardRequest(req, hostname, res) {
   });
 
   req.on("end", () => {
+    ui.writeVerboseInformation(
+      `Safe-chain: Finished proxying request to ${req.url} for ${hostname}`
+    );
     proxyReq.end();
   });
 }

packages/safe-chain/src/registryProxy/registryProxy.js

@@ -109,6 +109,7 @@ function handleConnect(req, clientSocket, head) {
     mitmConnect(req, clientSocket, isAllowedUrl);
   } else {
     // For other hosts, just tunnel the request to the destination tcp socket
+    ui.writeVerboseInformation(`Safe-chain: Tunneling request to ${req.url}`);
     tunnelRequest(req, clientSocket, head);
   }
 }