Support SourceMap response header

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## [2.2.0](https://github.com/omrilotan/isbot/compare/v2.1.0...v2.2.0)
+
+- Support reading sourcemap location from [SourceMap header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/SourceMap)
+
 ## [2.1.0](https://github.com/omrilotan/isbot/compare/v2.0.0...v2.1.0)
 
 - Support reading and creating a config file (`colombo --config`)

bin.js

@@ -4,6 +4,7 @@ import { readFile } from "node:fs/promises";
 import inquirer from "inquirer";
 import chalk from "chalk";
 import semver from "semver";
+import sourceMappingURL from "source-map-url";
 import { config } from "./lib/config/index.js";
 import { getSourceCodeMapUrl } from "./lib/getSourceCodeMapUrl/index.js";
 import { loader } from "./lib/loader/index.js";
@@ -90,9 +91,11 @@ async function start() {
 					`Failed to load file ${clean}: ${response.status} ${response.statusText}`,
 				);
 			}
-			const code = await response.text();
+			const file =
+				response.headers.get("SourceMap") ||
+				sourceMappingURL.getFrom(await response.text());
 			loader.end();
-			const mapUrl = getSourceCodeMapUrl(code, clean);
+			const mapUrl = getSourceCodeMapUrl(file, clean);
 
 			if (mapUrl) {
 				({ url } = await prompt([

index.js

@@ -67,11 +67,6 @@ async function getData(url, { headers } = {}) {
 				`Failed to load file ${url}: ${response.status} ${response.statusText}`,
 			);
 		}
-		if (!response.ok) {
-			throw new Error(
-				`${url} returned status ${response.status} ${response.statusText}`,
-			);
-		}
 		const data = await response.text();
 
 		if (

lib/getSourceCodeMapUrl/index.js

@@ -1,10 +1,7 @@
 import { dirname, join } from "node:path";
 import { URL } from "node:url";
-import sourceMappingURL from "source-map-url";
-
-export function getSourceCodeMapUrl(source, url) {
-	const file = sourceMappingURL.getFrom(source);
 
+export function getSourceCodeMapUrl(file, url) {
 	if (!file) {
 		return;
 	}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "colombo",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "description": "🕵️‍♂️ View Javascript source code using source-map from CLI",
   "keywords": [
     "sourcemap",