letsencrypt: Improve error handling (#2868)

* letsencrypt: improve error handling

Use the new "body" field of the info dict in case of a HTTPError.

* letsencrypt: HTTP 202 is a valid status while polling

lib/ansible/modules/extras/web_infrastructure/letsencrypt.py

@@ -169,14 +169,18 @@ def simple_get(module,url):
     result = None
     try:
         content = resp.read()
+    except AttributeError:
+        if info['body']:
+            content = info['body']
+
+    if content:
         if info['content-type'].startswith('application/json'):
+            try:
                 result = module.from_json(content.decode('utf8'))
-        else:
-            result = content
-    except AttributeError:
-        result = None
             except ValueError:
                 module.fail_json(msg="Failed to parse the ACME response: {0} {1}".format(url,content))
+        else:
+            result = content
 
     if info['status'] >= 400:
         module.fail_json(msg="ACME request failed: CODE: {0} RESULT:{1}".format(info['status'],result))
@@ -370,14 +374,18 @@ class ACMEAccount(object):
         result = None
         try:
             content = resp.read()
+        except AttributeError:
+            if info['body']:
+                content = info['body']
+
+        if content:
             if info['content-type'].startswith('application/json'):
+                try:
                     result = self.module.from_json(content.decode('utf8'))
-            else:
-                result = content
-        except AttributeError:
-            result = None
                 except ValueError:
                     self.module.fail_json(msg="Failed to parse the ACME response: {0} {1}".format(url,content))
+            else:
+                result = content
 
         return result,info
 
@@ -637,7 +645,7 @@ class ACMEClient(object):
                 "keyAuthorization": keyauthorization,
             }
             result, info = self.account.send_signed_request(uri, challenge_response)
-            if info['status'] != 200:
+            if info['status'] not in [200,202]:
                 self.module.fail_json(msg="Error validating challenge: CODE: {0} RESULT: {1}".format(info['status'], result))
 
         status = ''