[tor-bugs] #33040 [Circumvention/Snowflake]: Minor Snowflake refactoring

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#33040: Minor Snowflake refactoring
-------------------------------------+------------------------
 Reporter:  dcf                      |          Owner:  dcf
     Type:  enhancement              |         Status:  closed
 Priority:  Medium                   |      Milestone:
Component:  Circumvention/Snowflake  |        Version:
 Severity:  Normal                   |     Resolution:  fixed
 Keywords:                           |  Actual Points:
Parent ID:                           |         Points:
 Reviewer:  cohosh                   |        Sponsor:
-------------------------------------+------------------------
Changes (by dcf):

 * status:  merge_ready => closed
 * resolution:   => fixed


Comment:

 Replying to [comment:3 cohosh]:
 > Do we still need a check for a nil BrokerChannel that was removed in
 [https://gitweb.torproject.org/user/dcf/snowflake.git/commit/?h=bug33040-refactor&id=84e9b0626c1eb3de2f97af7379c973413f6b476d
 this commit]? It looks like `NewBrokerChannel` can return `nil` on error.

 You're totally right. I misread what that function was doing.

 > In this case that seems to be if `brokerURL` isn't properly formatted.
 Perhaps an error check and log message in `client/snowflake.go` on the
 return of that function?

 I think this is a good idea so I made a small change
 ([https://gitweb.torproject.org/user/dcf/snowflake.git/log/?h=bug33040-refactor-2
 bug33040-refactor-2],
 [https://gitweb.torproject.org/user/dcf/snowflake.git/diff/?h=bug33040-refactor-2
 diff against previous]) before pushing. It moves the URL syntax check to
 happen once at the top level, and the result of the code can assume it has
 a non-`nil` `BrokerChannel.url`.

 Merged in [https://gitweb.torproject.org/pluggable-
 transports/snowflake.git/log/?id=db1ba4791b101b7a83060261bb44769dd7db8e25
 db1ba4791b101b7a83060261bb44769dd7db8e25].

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33040#comment:4>
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