Cannot access individual shard through /_node/{node-name}/shard-path URL

[wohali]

@rnewson I tried all variants but can't get this to work...

$ dev/run -n 1 -a admin:password >/dev/null &
# wait a few seconds, then...
$ curl -X PUT http://admin:password@localhost:15984/abc
{"ok":true}
$ ls dev/lib/node1/data/shards/00000000-7fffffff
abc.1580273428.couch              _replicator.1580273362.couch
_global_changes.1580273362.couch  _users.1580273361.couch
$ curl http://admin:password@localhost:15984/_node/_local/_all_dbs
["_dbs","_nodes","_users","shards/00000000-7fffffff/_global_changes.1580273362","shards/00000000-7fffffff/_replicator.1580273362","shards/00000000-7fffffff/_users.1580273361","shards/00000000-7fffffff/abc.1580273428","shards/80000000-ffffffff/_global_changes.1580273362","shards/80000000-ffffffff/_replicator.1580273362","shards/80000000-ffffffff/_users.1580273361","shards/80000000-ffffffff/abc.1580273428"]
$ curl http://admin:password@localhost:15984/_node/_local/abc
{"error":"not_found","reason":"no_db_file"}
$ curl http://admin:password@localhost:15984/_node/_local/shards/00000000-7fffffff/abc.1580273428
{"error":"not_found","reason":"no_db_file"}
$ curl http://admin:password@localhost:15984/_node/_local/shards%2f00000000-7fffffff%2fabc.1580273428
{"error":"not_found","reason":"no_db_file"}

[wohali]

Needless to say this also extends to being able to access a ddoc shard, e.g. GET /_node/{nodename}/{db-shard}/{ddoc}/_info.

[wohali]

Looks like we're not parsing the URL sufficiently intelligently to support this, per the logfile:

error] 2020-01-29T15:32:02.998063Z node1@127.0.0.1 <0.1421.0> -------- Could not open file /home/joant/couchdb/dev/lib/node1/data/shards.couch: no such file or directory
[notice] 2020-01-29T15:32:02.999013Z node1@127.0.0.1 <0.1385.0> 208178fff9 localhost:15984 127.0.0.1 admin GET /_node/_local/shards/00000000-7fffffff/abc.1580273428 404 ok 5
[info] 2020-01-29T15:32:02.999583Z node1@127.0.0.1 <0.1420.0> -------- open_result error {not_found,no_db_file} for shards
[error] 2020-01-29T15:32:10.914265Z node1@127.0.0.1 <0.1559.0> -------- Could not open file /home/joant/couchdb/dev/lib/node1/data/shards.couch: no such file or directory
[info] 2020-01-29T15:32:10.914852Z node1@127.0.0.1 <0.1558.0> -------- open_result error {not_found,no_db_file} for shards
[notice] 2020-01-29T15:32:10.915021Z node1@127.0.0.1 <0.1519.0> e92985c5e2 localhost:15984 127.0.0.1 admin GET /_node/_local/shards%2f00000000-7fffffff%2fabc.1580273428 404 ok 4

I'll see if I can work around this.