OpenResty json 删除转义符

OpenResty 中删除 json 中的转义符

cjson 在 encode 时  “/” 会自动添加转义符 “\”； 在 decode 时也会自动将转义符去掉。工作中有个特殊需求，需要手工删除转义符。记录备忘，代码如下：

   #! /usr/bin/env lua
   json = require "cjson"

   result = {}
   result["stream"] = "lufei"
   result["app"] = "live/cartoon"

   oldStr = json.encode(result)
   local from, to, err = ngx.re.find(oldStr, [[\\]])
  ngx.say(from, to)
  newStr, n, err = ngx.re.gsub(oldStr, [[\\/]], [[/]])
  ngx.say("oldStr: "..oldStr)
  ngx.say("newStr: "..newStr )

  t = json.decode(newStr)
  ngx.say(t["app"])

dill@bunbun:~/openresty-test/locations$ curl -i localhost:/test
HTTP/1.1  OK
Server: openresty/1.11.2.2
Date: Wed,  Jul  :: GMT
Content-Type: text/plain
Transfer-Encoding: chunked
Connection: keep-alive

oldStr: {"app":"live\/cartoon","stream":"lufei"}
newStr: {"app":"live/cartoon","stream":"lufei"}
live/cartoon