From 83fcfecdb1b0b6644c0e0191436841a6af201252 Mon Sep 17 00:00:00 2001
From: Anthonios Partheniou <partheniou@google.com>
Date: Sat, 12 Dec 2020 22:20:38 +0000
Subject: [PATCH] Check for HTTP 404 in case API is not available

---
 describe.py | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/describe.py b/describe.py
index 2537e7c06ee..c1bcd692155 100755
--- a/describe.py
+++ b/describe.py
@@ -389,6 +389,16 @@ def document_api(name, version, uri):
   """
     try:
         service = build(name, version)
+
+        http = build_http()
+        response, content = http.request(
+            uri or uritemplate.expand(
+                FLAGS.discovery_uri_template, {"api": name, "apiVersion": version}
+            )
+        )
+        if 'status' in response:
+            if response['status'] == '404':
+                raise UnknownApiNameOrVersion
     except UnknownApiNameOrVersion as e:
         print("Warning: {} {} found but could not be built.".format(name, version))
         return
@@ -396,12 +406,6 @@ def document_api(name, version, uri):
         print("Warning: {} {} returned {}.".format(name, version, e))
         return
 
-    http = build_http()
-    response, content = http.request(
-        uri or uritemplate.expand(
-            FLAGS.discovery_uri_template, {"api": name, "apiVersion": version}
-        )
-    )
     discovery = json.loads(content)
 
     version = safe_version(version)