chproxy

Fixed #43

• Fixed issue #42

• extend allow params for #37
• allow to configure read, write and idle timeouts for proxy #36

• support param_groups - named lists of URL params to send with each query to ClickHouse. See #33
• additional validation for security_groups

• support for enable_http_compression parameter
• support external_data processing

• sort Accept-Encoding header for getting the same cache key for different browsers

• support http-01 challenge for letsencrypt

• fix issue with caching of gzipped requests
• fix issue with partially written response caches when client closed connection

• Fixed a bug preventing from caching responses for queries with decompress=1 (see #16).

• support compress and decompress params
• store dependencies in local vendor folder

• extend config.Duration with support of d (means a day) and w (means a week) time units

• fixed a bug when statusCode was overridden when caching

• Skip leading comments from the query before caching it. This fixes caching for queries from tabix.

• Added ability to set cache_namespace via GET query arg. This makes possible to instantly flush cache by switching to new namespace. See docs for more details.
• Actualized grafana dasbhoard.
• Increased test coverage.
• Debug messages now contain elapsed request duration.

• Added cache label to all the cache-related metrics.
• Forcibly kill queries for canceled requests (i.e. when the user closes http connection to chproxy).
• Added ability to balance load among available replicas.

• Disallow http methods other than GET, POST and OPTIONS.
• Print the real file:number position in error messages written via respondWith.
• Added ability to disable response caching if request contains no_cache=1 query param.

• Add Content-Length and Cache-Control: max-age headers for cached responses.
• Allow cache reconfiguration without chproxy restart on SIGHUP signal.
• Enable dogpile effect protection for cached responses by default.

• Added response caching.
• Improved error logging and debug logging (log_debug: true). Now log messages contain useful info such as client address, user name, cluster name, node address and the query.
• Fixed bugs preventing from killing timed out queries.

Beta release. May contain bugs.

Changes

• Initial response caching support.
• Improved error and debug logging.