Lua SPHINX client driver for ngx_lua based on the cosocket API
 
 USE:
 with openresty
 
location /sphinxtest {
        default_type "text/plain";
        content_by_lua '

        local args = ngx.req.get_uri_args()

        if args["key"] == nil then
            return
        end

        local sphinx = require "resty.sphinxapi"

        query=args["key"]

        local client, err = sphinx.new()
        if not client then
            ngx.say(err)
            return
        end

        ok,err = client:set_server("192.168.40.29",9312)
        if not ok then
            ngx.say("connect faile!!",err)
            return
        end

        client:set_match_mode( 6 )
        client:set_field_weights( 2, {"title","content"}, {500,1} )
        res=client:query(query,"*","")

        --ngx.say(string.format("Query %s retrieved %d of %d matches.",query, res.total, res.total_found))
        --ngx.say ( "Query stats:" )
        --for  i=1,res.num_words do
        --    ngx.say ( string.format("\t %s found %d times in %d documents",
        --    res.words[i].word, res.words[i].hits, res.words[i].docs) )
        --end

        --ngx.say ( "Matches:" )

        --for i=1, res.num_matches do
        --    ngx.say("")
        --    ngx.say ( string.format("%d. doc_id=%d, weight=%d", i,res.matches[i].doc,res.matches[i].weight) )
        --    ngx.say ( "attrs:" );
        --    for j=1,res.num_attrs do
        --        ngx.say(res.attr_names[j],"=",res.matches[i].attr[j].value)
        --    end

        --end

        local cjson = require "cjson"
        ngx.say( cjson.encode(res))

        ';
      }
	 
	 
RESULT:
http://192.168.131.132/sphinxtest?key=Opera

{
    words: [
    {
        word: "opera",
        hits: 2,
        docs: 1
    }
    ],
    matches: [
    {
        attr: [
        {
            value: 3
        },
    {
        value: 1270094460
    }
    ],
    weight: 499966,
    doc: 3
    }
    ],
    status: 0,
    attr_names: [
        "group_id",
        "date_added"
    ],
    num_matches: 1,
    attr_types: [
        1,
        2
    ],
    num_words: 1,
    fields: { },
    num_attrs: 2,
    time_msec: 2,
    total_found: 1,
    num_fields: 2,
    total: 1
}


http://192.168.131.132/sphinxtest?key=%E6%8B%AD%E7%9B%AE%E4%BB%A5%E5%BE%85

{
    words: [
    {
        word: "拭目以待",
        hits: 1,
        docs: 1
    }
    ],
    matches: [
    {
        attr: [
        {
            value: 2
        },
        {
            value: 1270131607
        }
    ],
    weight: 499053,
    doc: 1
    }
    ],
    status: 0,
    attr_names: [
        "group_id",
        "date_added"
    ],
    num_matches: 1,
    attr_types: [
        1,
        2
    ],
    num_words: 1,
    fields: { },
    num_attrs: 2,
    time_msec: 4,
    total_found: 1,
    num_fields: 2,
    total: 1
}