Access Couch DB database URL through rewritten URL, with query parameters

Question

I have my web site run out of a Couch DB instance, so I have my vhost configured to point to /dbname/_design/app/_rewrite.

I want to be able to access the i

Answer 1

I tried to duplicate your problem but it is working. Below is my interaction. (Note, I use the IP address, 127.0.0.1:5984, to ensure no vhost/rewrite problems, then I access the "production" site via localhost:5984.

There is a bug it seems with query parameters being appended to rewrites ending with "..". Instead of rewriting to ../?key=val it writes to ..?key=val which CouchDB does not parse.

I do not think it is necessary to query a database URL with parameters. So one workaround is to always make sure you never do that. (E.g. if you blindly append no-op parameters to all queries to simplify the code, you'd have to alter that.)

Another workaround is to enable rewrite to the root CouchDB URL. This requires setting /_config/httpd/secure_rewrites to false.

{ "from":"/api/*", "to":"../../../*" }

Now you can query http://localhost:5984/api/x?key=val or http://localhost:5984/api/x/_changes?since=5. (You cannot query the root URL with parameters—it's still the bug, but in a less trafficked place.)

Following is the initial terminal session:

$ mkdir t
$ cd t
$ curl -XDELETE 127.0.0.1:5984/x 
{"ok":true}
$ curl -XPUT 127.0.0.1:5984/x 
{"ok":true}
$ curl 127.0.0.1:5984
{"couchdb":"Welcome","version":"1.0.1"}

$ echo -n _design/test > _id
$ mkdir shows
$ echo 'function() { return "hello world!\n" }' > shows/hello.js
$ cat > rewrites.json
[ { "from":"/db/*", "to":"../../*" }
, { "from":"/*"   , "to":"*"}
]

$ echo '{}' > .couchapprc
$ couchapp push http://127.0.0.1:5984/x
$ curl -XPUT http://127.0.0.1:5984/_config/vhosts/localhost:5984 -d '"/x/_design/test/_rewrite"'
"/x/_design/test/_rewrite"

$ curl localhost:5984 # This is the design document.
{"_id":"_design/test","_rev":"1-e523efd669aa5375e711f8e4b764da7a","shows":{"hello":"function() { return \"hello world!\\n\" }"},"couchapp":{"signatures":{},"objects":{},"manifest":["rewrites.json","shows/","shows/hello.js"]},"rewrites":[{"to":"../../*","from":"/db/*"},{"to":"*","from":"/*"}]}
$ curl localhost:5984/_show/hello
hello world!

$ curl localhost:5984/db # This is the DB.
{"db_name":"x","doc_count":1,"doc_del_count":0,"update_seq":1,"purge_seq":0,"compact_running":false,"disk_size":4185,"instance_start_time":"1298269455135987","disk_format_version":5,"committed_update_seq":1}
$ curl localhost:5984/db/_changes
{"results":[
{"seq":1,"id":"_design/test","changes":[{"rev":"1-e523efd669aa5375e711f8e4b764da7a"}]}
],
"last_seq":1}

$ curl localhost:5984/db/_changes?since=1 # Parameters accepted!
{"results":[

],
"last_seq":1}