Hi Age,
One thing to consider is that Riak allows a secondary index to have multiple
values. I can e.g. create an object with two values for a integer secondary
index as follows:
curl -X PUT -H "Content-Type: text/plain" -H 'x-riak-index-idx_int: 12'
-H 'x-riak-index-idx_int: 13' -d 'data'
http://localhost:8098/buckets/testbucket/keys/key2
When this object is retrieved, the secondary index with the two values will/may
be presented in a single header containing a comma and a space to separate the
values as follows:
curl -v -X HEAD http://localhost:8098/buckets/testbucket/keys/key2
< HTTP/1.1 200 OK
< X-Riak-Vclock: a85hYGBgzGDKBVIcEQaWHIFK0u0ZTImMeawMRntnnuLLAgA=
< x-riak-index-idx_int: 12, 13
< Vary: Accept-Encoding
< Server: MochiWeb/1.1 WebMachine/1.9.0 (someone had painted it blue)
< Link: </buckets/testbucket>; rel="up"
< Last-Modified: Wed, 20 Feb 2013 21:33:38 GMT
< ETag: "3Wz7RJnOL4ofIeX1hYDr84"
< Date: Wed, 20 Feb 2013 21:40:30 GMT
< Content-Type: text/plain
< Content-Length: 4
Best regards,
Christian
On 20 Feb 2013, at 20:56, Age Mooij <[email protected]> wrote:
> Hi all,
>
> I'm writing a new Scala (http) client library for Riak [1] and I ran into
> some trouble with special characters while implementing 2i.
>
> Reading through the docs, all the 2i examples are for simple one-word index
> names but I have not been able to find any rules about index names and values
> containing spaces, commas, and other special characters and how the HTTP api
> deals with encoding and decoding these?
>
> My unit tests use the following troublesome corner cases:
>
> - index values containing spaces
> - index names containing spaces
> - index values containing commas
>
> I tried a number of approaches and none of them work for all three:
>
> 1) Don't encode the index names or the values when creating "x-riak-index-"
> http headers but encode both the name and the value in the URL used to fetch
> by an index
>
> This works fine for values containing spaces but creates illegal headers for
> index names containing spaces and breaks for values containing commas (the
> values get split into two).
>
> 2) Encode everything
>
> This creates valid headers and storing index values containing commas now
> works fine. The only trouble is that index fetching fails whenever there are
> spaces, commas or other encoded characters involved.
>
> Could anyone enlighten me about the correct way to deal with these cases?
>
> Regards,
> Age
>
>
> [1] https://github.com/agemooij/riak-scala-client
>
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