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https://issues.apache.org/jira/browse/AIRFLOW-1330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16057857#comment-16057857
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Yu Ishikawa commented on AIRFLOW-1330:
--------------------------------------
If we want to any connection whose connection URI includes under score ({{_}}),
we can't add it with our CLI. Because the specification of URI's scheme doesn't
allow us to include under score.
{quote}
Scheme names consist of a sequence of characters. The lower case
letters "a"--"z", digits, and the characters plus ("+"), period
("."), and hyphen ("-") are allowed. For resiliency, programs
interpreting URLs should treat upper case letters as equivalent to
lower case in scheme names (e.g., allow "HTTP" as well as "http").
{quote}
Cited by https://www.ietf.org/rfc/rfc1738.txt
> Connection.parse_from_uri doesn't work for google_cloud_platform and so on
> --------------------------------------------------------------------------
>
> Key: AIRFLOW-1330
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1330
> Project: Apache Airflow
> Issue Type: Bug
> Components: cli
> Reporter: Yu Ishikawa
>
> h2. Overview
> {{Connection.parse_from_uri}} doesn't work for some types like
> {{google_cloud_platform}} whose type name includes under scores. Since
> `urllib.parse.urlparse()` which is used in {{Connection.parse_from_url}}
> doesn't support a schema name which include under scores.
> So, airflow's CLI doesn't work when a given connection URI includes under
> scores like {{google_cloud_platform://XXXXX}}.
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