potiuk opened a new pull request #4113: [AIRFLOW-3268] Cannot pass SSL dictionary to mysql connection via URL URL: https://github.com/apache/incubator-airflow/pull/4113 Make sure you have checked _all_ steps below. ### Jira - [x] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR" - https://issues.apache.org/jira/browse/AIRFLOW-3268 ### Description - [x] Here are some details about my PR, including screenshots of any UI changes: It is impossible to pass 'ssl' dictionary to MySql hook as an extrai param via URL connection. While there is a code to pass the 'ssl' extra query parameter, MySqldb requires this parameter to be dictionary. When you want to create a connection via URL, you can at most have ?ssl= url-encoded string rather than dictionary and this is how it is passed (as string). What happens then in MySqldb, is that all SSL parameters are ignored and MySQL establishes a non-SSL connection silently. This is fixed by detecting if 'ssl' is a string and converting it to json dictionary in such case. ### Tests - [x] My PR adds the following unit tests TestMySqlHookConn: test_get_conn_ssl_as_dictionary test_get_conn_ssl_as_string ### Commits - [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)": 1. Subject is separated from body by a blank line 1. Subject is limited to 50 characters (not including Jira issue reference) 1. Subject does not end with a period 1. Subject uses the imperative mood ("add", not "adding") 1. Body wraps at 72 characters 1. Body explains "what" and "why", not "how" ### Documentation - [x] In case of new functionality, my PR adds documentation that describes how to use it. No new functionality ### Code Quality - [x] Passes `flake8`
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