Wechats rewards and ngrok docker

on Wechats, ngrok, hongbao, and docker

微信开发过程

1. wechats gem

2. ngrok and docker

开发微信调试相对不方便，ngrok是一个很好的转发工具，but后面它被墙了。

还好可以它有可以搭建在服务器上面的功能，使用docker完美简单的解决这个问题。

ngrokd-refer1 ngrokd-refer2

# 服务器搭建
docker run -d --name ngrokd \
  -p 80:80 \
  -p 443:443 \
  -p 4443:4443 \
  sequenceiq/ngrokd \
    -httpAddr=:80 \
    -httpsAddr=:443 \
    -domain=ngrok.yourdomain.com
    
# 客户端下载
curl -o /usr/local/bin/ngrok https://s3-eu-west-1.amazonaws.com/sequenceiq/ngrok_linux
chmod +x /usr/local/bin/ngrok

# 配置文件
cat > ~/.ngrok <<EOF
server_addr: ngrok.yourdomain.com:4443
trust_host_root_certs: false
EOF

# 本地使用
ngrok 8000

3. 微信红包

3.1 下载相关的认证文件

3.2 配置微信相关文件

3.3 发送微信红包请求

3.3.1 构建请求参数

def build_params(openid, amount, num)
    options = {
      nonce_str: nonce_str ,#随机字符串
      mch_billno: order_num, # 商户订单号
      mch_id: Settings.wechats_mch_id,#商户编号
      wxappid: Settings.wechats_appid, # 公众账号appid
      send_name: '极客实验室', # 提供方名称
      re_openid: openid, # 用户openid
      total_amount: amount, # 付款金额
      total_num: num, # 红包发放总人数
      wishing: '现金红包奖励', # 红包祝福语
      client_ip: Settings.domain_ip, # Ip地址
      act_name: '现金红包', # 活动名称
      remark: '现金红包奖励' # 备注
    }
    options[:sign] = md5_with_partner_key(options)

    options
end

def nonce_str
  SecureRandom.hex
end

def order_num
  Settings.wechats_mch_id.to_s + Time.now.strftime('%Y%-m%-d') + Time.now.to_i.to_s
end

def md5_with_partner_key(params)
  str = params.sort.map { |item| item.join('=') }.join('&')
  str << "&key=#{Settings.wechats_pay_secret}"
  Digest::MD5.hexdigest(str).upcase
end

3.3.2 读取认证文件

def build_cert_http
  cert = File.read("#{ Rails.root }/cert/apiclient_cert.pem")
  key = File.read("#{ Rails.root }/cert/apiclient_key.pem")
  @uri = URI.parse URL
  http = Net::HTTP.new(@uri.host, @uri.port)
  http.use_ssl = true if @uri.scheme == 'https'
  http.cert = OpenSSL::X509::Certificate.new(cert)
  http.key = OpenSSL::PKey::RSA.new(key, '商户编号')
  http.ca_file = File.join("#{ Rails.root}/cert/rootca.pem")
  http.verify_mode = OpenSSL::SSL::VERIFY_PEER
  
  http
end

3.3.3 构建返回参数

def build_xml_body(options)
    xml = <<-XML.strip_heredoc
      <xml>
      <sign><![CDATA[#{options[:sign]}]]></sign>
      <mch_billno><![CDATA[#{options[:mch_billno]}]]></mch_billno>
      <mch_id><![CDATA[#{options[:mch_id]}]]></mch_id>
      <wxappid><![CDATA[#{options[:wxappid]}]]></wxappid>
      <send_name><![CDATA[#{options[:send_name]}]]></send_name>
      <re_openid><![CDATA[#{options[:re_openid]}]]></re_openid>
      <total_amount><![CDATA[#{options[:total_amount]}]]></total_amount>
      <total_num><![CDATA[#{options[:total_num]}]]></total_num>
      <wishing><![CDATA[#{options[:wishing]}]]></wishing>
      <client_ip><![CDATA[#{options[:client_ip]}]]></client_ip>
      <act_name><![CDATA[#{options[:act_name]}]]></act_name>
      <remark><![CDATA[#{options[:remark]}]]></remark>
      <nonce_str><![CDATA[#{options[:nonce_str]}]]></nonce_str>
      </xml>
    XML

    Nokogiri::XML xml
end

3.3.4 发送请求并解析

http.start do
  http.request_post(@uri.path, xml.to_xml) do |res|
    doc = Hash.from_xml(res.body)['xml']
    return '恭喜你获得红包' if doc['return_code'] == 'SUCCESS'
  end
end