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Set libpq sslcompression to off by default

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Since SSL compression is no longer recommended, turn the default in
libpq from on to off.

OpenSSL 1.1.0 and many distribution packages already turn compression
off by default, so such a server won't accept compression anyway.  So
this will mainly affect users of older OpenSSL installations.

Also update the documentation to make clear that this setting is no
longer recommended.

Discussion: https://www.postgresql.org/message-id/flat/595cf3b1-4ffe-7f05-6f72-f72b7afa7993%402ndquadrant.com
This commit is contained in:
Peter Eisentraut
2018-03-17 08:56:50 -04:00
parent 8a3d942529
commit e3bdb2d926
3 changed files with 25 additions and 16 deletions
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2
src/interfaces/libpq/fe-connect.c
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@ -279,7 +279,7 @@ static const internalPQconninfoOption PQconninfoOptions[] = {
"SSL-Mode", "", 12, /* sizeof("verify-full") == 12 */
offsetof(struct pg_conn, sslmode)},
{"sslcompression", "PGSSLCOMPRESSION", "1", NULL,
{"sslcompression", "PGSSLCOMPRESSION", "0", NULL,
"SSL-Compression", "", 1,
offsetof(struct pg_conn, sslcompression)},