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