微信开发实战笔记

TestApi::Application.routes.draw do
  get "/api/winxin/cert"  => "weixin/auths#auth"

  scope "/", via: :post do
    match "api/weixin/cert" => "weixin/auths#info_meals",      constraints: WxRouter.new("event", event: "CLICK", event_key: "info_meals")
    match "api/weixin/cert" => "weixin/users#subscribe_tags",  constraints: WxRouter.new("text",  content: /^tag/i)    
    match "api/weixin/cert" => "weixin/auths#subscribe",       constraints: WxRouter.new("event", event: "subscribe")
    match "api/weixin/cert" => "weixin/auths#user_scan",       constraints: WxRouter.new("event", event: "SCAN",  event_key: /\d+/)
    match "api/weixin/cert" => "weixin/auths#reply_any",       constraints: lambda {|r| r.params} # 接受参代码参数
  end
end
# WxRouter类定义, 用来分析和解析类型
class WxRouter
  def initialize(msg_type="text", options={})
    @message_type = msg_type
    @event_key    = options[:event_key] if options[:event_key]
    @wx_event     = options[:event]     if options[:event]
    @content      = options[:content]   if options[:content]
  end

  def matches?(request)
    xml_data = request.params[:xml]
    if xml_data && xml_data.is_a?(Hash)
      (return false unless @message_type == request.params[:xml][:MsgType])  if @message_type
      (return false unless @event_key    == request.params[:xml][:EventKey]) if @event_key && @event_key.is_a?(String)
      (return false unless @event_key    =~ request.params[:xml][:EventKey]) if @event_key && @event_key.is_a?(Regexp)
      (return false unless @wx_event     == request.params[:xml][:Event])    if @wx_event
      (return false unless @content      == request.params[:xml][:Content])  if @content && @content.is_a?(String)
      (return false unless @content      =~ request.params[:xml][:Content])  if @content && @content.is_a?(Regexp)
    end
    true
  end
end

class WxMenu
  def self.build
    menu = {
      button: [{
          name: "xxxx",
          sub_button: [{
              type: "click",
              name: "yyyy",
              key:  "info_hot"
            },{
              type: "click",
              name: "zzzz",
              key:  "info_meals"
          }]
        }] #button
    }
    response = JSON.parse  RestClient.post((Settings.wx_create_menu_url % WxAccessToken.token),  menu.to_json, content_type: "application/json")
    STDOUT.puts response.inspect
  end

  def self.clear
    response = JSON.parse  RestClient.get(Settings.wx_delete_menu_url % WxAccessToken.token)
    STDOUT.puts response.inspect
  end
end
# 访问token的实现
class WxAccessToken

  def self.token is_force=false
    Rails.cache.fetch "wx_token", expires_in: 6000, force: is_force, race_condition_ttl: 10, raw: true do
      # 发现access_token每次都会不一样，每次访问，都会使得之前的失效
      JSON.parse(RestClient.get "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=#{Settings.wx_appid}&secret=#{Settings.wx_secret}")["access_token"]
    end
  end

end