[leo_gateway] A Delete request failed when cache.http_cache = true

[mocchira]

Set cache.http_cache = true in leo_gateway.conf then
Invoking a delete request to leo_gateway will cause the below error

[E]     [email protected]     2016-06-22 02:01:12.512289 +0000        1466560872      leo_gateway_s3_api:handle_2/6   648     [{key,"bbb/hoge"},{cause,{function_clause,[{leo_gateway_http_commons,'-onresponse/2-fun-4-',[204,[{<<"connection">>,<<"keep-alive">>},{<<"date">>,<<"Wed, 22 Jun 2016 02:01:12 GMT">>},{<<"content-length">>,"0"},{<<"server">>,<<"LeoFS">>}],<<>>,{http_req,#Port<0.2100>,ranch_tcp,keepalive,<0.2234.0>,<<"DELETE">>,'HTTP/1.1',{{127,0,0,1},35347},<<"localhost">>,undefined,8080,<<"/bbb/hoge">>,undefined,<<>>,[],[],[{<<"user-agent">>,<<"curl/7.35.0">>},{<<"host">>,<<"localhost:8080">>},{<<"accept">>,<<"*/*">>}],[],undefined,[],waiting,<<>>,undefined,false,waiting,[],<<>>,already_called}],[{file,"src/leo_gateway_http_commons.erl"},{line,213}]},{cowboy_req,response,6,[{file,"src/cowboy_req.erl"},{line,1170}]},{cowboy_req,reply_no_compress,8,[{file,"src/cowboy_req.erl"},{line,930}]},{cowboy_req,reply,4,[{file,"src/cowboy_req.erl"},{line,885}]},{leo_gateway_s3_api,handle_2,6,[{file,"src/leo_gateway_s3_api.erl"},{line,645}]},{cowboy_handler,handler_handle,4,[{file,"src/cowboy_handler.erl"},{line,111}]},{cowboy_protocol,execute,4,[{file,"src/cowboy_protocol.erl"},{line,435}]}]}}]
[E]     [email protected]     2016-06-22 02:01:12.513300 +0000        1466560872      null:null       0       Error in process <0.2234.0> on node '[email protected]' with exit value: {function_clause,[{leo_gateway_http_commons,'-onresponse/2-fun-4-',[500,[{<<10 bytes>>,<<10 bytes>>},{<<6 bytes>>,<<6 bytes>>},{<<4 bytes>>,<<29 bytes>>},{<<14 bytes>>,"0"}],<<0 bytes>>,{http_req,#Port<0.2100>,ranch_tcp,keepalive,<0.2234.0>,<<6 bytes>>,'HTTP/1.1',{{127,0,0,1},35347},<<9 bytes>>,undefined,8080,<<9 bytes>>,undefined,<<0 bytes>>,undefined,[],[{<<10 bytes>>,<<11 bytes>>},{<<4 bytes>>,<<14 bytes>>},{<<6 bytes>>,<<3 bytes>>}],[],undefined,[],waiting,<<0 bytes>>,undefined... 


[E]     [email protected]     2016-06-22 02:01:12.515289 +0000        1466560872      null:null       0       Ranch listener leo_gateway_s3_api had connection process started with cowboy_protocol:start_link/4 at <0.2234.0> exit with reason: {function_clause,[{leo_gateway_http_commons,'-onresponse/2-fun-4-',[500,[{<<"connection">>,<<"keep-alive">>},{<<"server">>,<<"Cowboy">>},{<<"date">>,<<"Wed, 22 Jun 2016 02:01:12 GMT">>},{<<"content-length">>,"0"}],<<>>,{http_req,#Port<0.2100>,ranch_tcp,keepalive,<0.2234.0>,<<"DELETE">>,'HTTP/1.1',{{127,0,0,1},35347},<<"localhost">>,undefined,8080,<<"/bbb/hoge">>,undefined,<<>>,undefined,[],[{<<"user-agent">>,<<"curl/7.35.0">>},{<<"host">>,<<"localhost:8080">>},{<<"accept">>,<<"*/*">>}],[],undefined,[],waiting,<<>>,undefined,false,waiting,[],<<>>,already_called}],[{file,"src/leo_gateway_http_commons.erl"},{line,213}]},{cowboy_req,response,6,[{file,"src/cowboy_req.erl"},{line,1170}]},{cowboy_req,reply_no_compress,8,[{file,"src/cowboy_req.erl"},{line,930}]},{cowboy_req,reply,4,[{file,"src/cowboy_req.erl"},{line,885}]},{cowboy_req,maybe_reply,2,[{file,"src/cowboy_req.erl"},{line,995}]},{cowboy_handler,handler_handle,4,[{file,"src/cowboy_handler.erl"},{line,117}]},{cowboy_protocol,execute,4,[{file,"src/cowboy_protocol.erl"},{line,435}]}]}

due to the below pattern matching.
https://github.com/leo-project/leo_gateway/blob/1.2.22/src/leo_gateway_http_commons.erl#L213

Can be fixed by matching not only 200 but also other 20x status codes

[mocchira]

It turned out that LeoFS also need to handle other status codes like 40x, 50x in onresponse handler.