[XS] Change in pysim[master]: http_json_api: Only require Content-Type if response body is non-empty

[laforge]

laforge has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/pysim/+/41998?usp=email )


Change subject: http_json_api: Only require Content-Type if response body is 
non-empty
......................................................................

http_json_api: Only require Content-Type if response body is non-empty

If there is an empty body returned, such as in the case of the response
to an es9p notification, then it is of course also legal to not set the
content-type header.

This patch fixes an exception when talking to certain SM-DP+ with
es9p_client.py:

DEBUG:pySim.esim.http_json_api:HTTP RSP-STS: [204] hdr: {'X-Admin-Protocol': 
'gsma/rsp/v2.5.0', 'Date': 'Wed, 28 Jan 2026 18:26:39 GMT', 'Server': 
'REDACTED'}
DEBUG:pySim.esim.http_json_api:HTTP RSP: b''
{'X-Admin-Protocol': 'gsma/rsp/v2.5.0', 'Date': 'Wed, 28 Jan 2026 18:26:39 
GMT', 'Server': 'REDACTED'}
<Response [204]>
Traceback (most recent call last):
  File "gprojects/git/pysim/es9p/../contrib/es9p_client.py", line 315, in 
<module>
    c.do_notification()
    ~~~~~~~~~~~~~~~~~^^
  File "projects/git/pysim/es9p/../contrib/es9p_client.py", line 159, in 
do_notification
    res = self.peer.call_handleNotification(data)
  File "projects/git/pysim/contrib/pySim/esim/es9p.py", line 174, in 
call_handleNotification
    return self.handleNotification.call(data)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "projects/git/pysim/contrib/pySim/esim/http_json_api.py", line 335, in 
call
    if not 
response.headers.get('Content-Type').startswith(req_headers['Content-Type']):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'startswith'

Change-Id: I99e8f167b7bb869c5ff6d908ba673dac87fef71a
---
M pySim/esim/http_json_api.py
1 file changed, 1 insertion(+), 1 deletion(-)



  git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/98/41998/1

diff --git a/pySim/esim/http_json_api.py b/pySim/esim/http_json_api.py
index e640b3f..36caac9 100644
--- a/pySim/esim/http_json_api.py
+++ b/pySim/esim/http_json_api.py
@@ -330,7 +330,7 @@
         # SGP.22, section 6.5.1)
         if response.status_code != self.api_func.expected_http_status:
             raise HttpStatusError(response)
-        if not 
response.headers.get('Content-Type').startswith(req_headers['Content-Type']):
+        if response.content and not 
response.headers.get('Content-Type').startswith(req_headers['Content-Type']):
             raise HttpHeaderError(response)
         if not response.headers.get('X-Admin-Protocol', 
'gsma/rsp/v2.unknown').startswith('gsma/rsp/v2.'):
             raise HttpHeaderError(response)

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Gerrit-MessageType: newchange
Gerrit-Project: pysim
Gerrit-Branch: master
Gerrit-Change-Id: I99e8f167b7bb869c5ff6d908ba673dac87fef71a
Gerrit-Change-Number: 41998
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <lafo...@osmocom.org>