fix getDetails JSON error on 5xx status code

Author: PriOliveira

ipinfo/handler.py

@@ -123,8 +123,12 @@ def getDetails(self, ip_address=None, timeout=None):
         if response.status_code == 429:
             raise RequestQuotaExceededError()
         if response.status_code >= 400:
-            error_response = response.json()
             error_code = response.status_code
+            content_type = response.headers.get('Content-Type')
+            if content_type == 'application/json':
+                error_response = response.json()
+            else:
+                error_response = {'error': response.text}
             raise APIError(error_code, error_response)
         details = response.json()
 

ipinfo/handler_async.py

@@ -145,8 +145,12 @@ async def getDetails(self, ip_address=None, timeout=None):
             if resp.status == 429:
                 raise RequestQuotaExceededError()
             if resp.status >= 400:
-                error_response = await resp.json()
                 error_code = resp.status
+                content_type = resp.headers.get('Content-Type')
+                if content_type == 'application/json':
+                    error_response = await resp.json()
+                else:
+                    error_response = {'error': resp.text()}
                 raise APIError(error_code, error_response)
             details = await resp.json()