finish FIXME: move open_browser() to addon/browser (#3832)

mitmproxy/tools/web/master.py

@@ -1,5 +1,3 @@
-import webbrowser
-
 import tornado.httpserver
 import tornado.ioloop
 from tornado.platform.asyncio import AsyncIOMainLoop
@@ -112,38 +110,4 @@ class WebMaster(master.Master):
         self.log.info(
             "Web server listening at {}".format(web_url),
         )
-        # FIXME: This should be in an addon hooked to the "running" event, not in master
-        if self.options.web_open_browser:
-            success = open_browser(web_url)
-            if not success:
-                self.log.info(
-                    "No web browser found. Please open a browser and point it to {}".format(web_url),
-                )
         self.run_loop(iol.start)
-
-
-def open_browser(url: str) -> bool:
-    """
-    Open a URL in a browser window.
-    In contrast to webbrowser.open, we limit the list of suitable browsers.
-    This gracefully degrades to a no-op on headless servers, where webbrowser.open
-    would otherwise open lynx.
-
-    Returns:
-        True, if a browser has been opened
-        False, if no suitable browser has been found.
-    """
-    browsers = (
-        "windows-default", "macosx",
-        "google-chrome", "chrome", "chromium", "chromium-browser",
-        "firefox", "opera", "safari",
-    )
-    for browser in browsers:
-        try:
-            b = webbrowser.get(browser)
-        except webbrowser.Error:
-            pass
-        else:
-            b.open(url)
-            return True
-    return False

mitmproxy/tools/web/webaddons.py

@@ -1,3 +1,8 @@
+import webbrowser
+
+from mitmproxy import ctx
+
+
 class WebAddon:
     def load(self, loader):
         loader.add_option(
@@ -16,3 +21,39 @@ class WebAddon:
             "web_iface", str, "127.0.0.1",
             "Web UI interface."
         )
+
+    def running(self):
+        if hasattr(ctx.options, "web_open_browser") and ctx.options.web_open_browser:
+            web_url = "http://{}:{}/".format(ctx.options.web_iface, ctx.options.web_port)
+            success = open_browser(web_url)
+            if not success:
+                ctx.log.info(
+                    "No web browser found. Please open a browser and point it to {}".format(web_url),
+                )
+
+
+def open_browser(url: str) -> bool:
+    """
+    Open a URL in a browser window.
+    In contrast to webbrowser.open, we limit the list of suitable browsers.
+    This gracefully degrades to a no-op on headless servers, where webbrowser.open
+    would otherwise open lynx.
+
+    Returns:
+        True, if a browser has been opened
+        False, if no suitable browser has been found.
+    """
+    browsers = (
+        "windows-default", "macosx",
+        "google-chrome", "chrome", "chromium", "chromium-browser",
+        "firefox", "opera", "safari",
+    )
+    for browser in browsers:
+        try:
+            b = webbrowser.get(browser)
+        except webbrowser.Error:
+            pass
+        else:
+            b.open(url)
+            return True
+    return False