[HTTP measurements] What is the use of query_string?
The documentation says that you can add a "query_string" parameter in a HTTP measurement but the anchor seems to ignore it?
On Tue, Jun 25, 2024 at 11:32:50AM +0200, Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote a message of 10 lines which said:
The documentation says that you can add a "query_string" parameter in a HTTP measurement but the anchor seems to ignore it?
A colleague suggests that it can be useful to disable caching if the poor probe is locked behing a transparent HTTP proxy with caching. {'is_oneoff': True, 'definitions': [{'description': 'HTTP GET to fr-par-as2486.anchors.atlas.ripe.net', 'af': 6, 'type': 'http', 'target': 'fr-par-as2486.anchors.atlas.ripe.net', 'method': 'GET', 'path': '/', 'query_string': 'disablecaching=123456789', 'https': False, 'more_extended_timing': True}], 'probes': [{'requested': 1, 'type': 'area', 'value': 'WW', 'tags': {'include': ['system-ipv6-works']}}]}
Hello, On Tue, Jun 25, 2024 at 2:04 PM Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote:
On Tue, Jun 25, 2024 at 11:32:50AM +0200, Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote a message of 10 lines which said:
The documentation says that you can add a "query_string" parameter in a HTTP measurement but the anchor seems to ignore it?
The anchors' HTTP service is described here: https://atlas.ripe.net/docs/howtos/anchors.html#ripe-atlas-anchor-services - basically agreeing with you, it ignores query parameters.
A colleague suggests that it can be useful to disable caching if the poor probe is locked behing a transparent HTTP proxy with caching.
{'is_oneoff': True, 'definitions': [{'description': 'HTTP GET to fr-par-as2486.anchors.atlas.ripe.net', 'af': 6, 'type': 'http', 'target': 'fr-par-as2486.anchors.atlas.ripe.net', 'method': 'GET', 'path': '/', 'query_string': 'disablecaching=123456789', 'https': False, 'more_extended_timing': True}], 'probes': [{'requested': 1, 'type': 'area', 'value': 'WW', 'tags': {'include': ['system-ipv6-works']}}]}
It is hard to judge a particular HTTP proxy's behaviour, but indeed adding some variance to the URL via the query string likely helps here. Regards, Robert
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On Wed, Jun 26, 2024 at 12:34:30PM +0200, Robert Kisteleki <robert@ripe.net> wrote a message of 37 lines which said:
It is hard to judge a particular HTTP proxy's behaviour, but indeed adding some variance to the URL via the query string likely helps here.
OK, I'll remember that, thanks. (I did not find yet a RIPE Atlas probe behind such a transparent caching proxy but they may exist.)
participants (2)
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Robert Kisteleki -
Stephane Bortzmeyer