lua-resty-iconv

LuaJIT FFI bindings for libiconv - Character encoding conversion in OpenResty

Sample

        location =/test {
            content_by_lua_block {
                local iconv = require 'resty.iconv'
    
                local from = 'UTF-8'
                local to   = 'GBK'
    
                ngx.header['Content-Type'] = 'text/plain;charset=' .. to
                local i, err = iconv:new(to, from)
                if not i then
                    return ngx.say(err)
                end
                local t, count = i:convert('文件编码UTF-8')
                if not t then
                    return ngx.say(count)
                end
                ngx.say('text : ', t)
                ngx.say('non-reversible characters : ', count)
            }
        }

Benchmark @ Intel(R) Core(TM) i3-4150 CPU @ 3.50GHz using ab -c10 -n50000 -k

    Server Software:        openresty/1.11.2.2
    Server Hostname:        localhost
    Server Port:            80
    
    Document Path:          /test
    Document Length:        51 bytes
    
    Concurrency Level:      10
    Time taken for tests:   1.585 seconds
    Complete requests:      50000
    Failed requests:        0
    Write errors:           0
    Keep-Alive requests:    49504
    Total transferred:      10847520 bytes
    HTML transferred:       2550000 bytes
    Requests per second:    31541.34 [#/sec] (mean)
    Time per request:       0.317 [ms] (mean)
    Time per request:       0.032 [ms] (mean, across all concurrent requests)
    Transfer rate:          6682.53 [Kbytes/sec] received
    
    Connection Times (ms)
                  min  mean[+/-sd] median   max
    Connect:        0    0   0.0      0       0
    Processing:     0    0   0.1      0       3
    Waiting:        0    0   0.1      0       3
    Total:          0    0   0.1      0       3
    
    Percentage of the requests served within a certain time (ms)
      50%      0
      66%      0
      75%      0
      80%      0
      90%      0
      95%      0
      98%      0
      99%      0
     100%      3 (longest request)