lua resty wechat
1.0.0
使用Lua编写的nginx服务器微信公众平台代理.
目标:
在前置的nginx内做微信代理, 降低内部应用层和微信服务的耦合.
配置微信公众号的自动回复, 在nginx内处理部分用户消息, 减小应用层压力.
统一管理微信公众号API中使用的access_token
, 作为中控服务器隔离业务层和API实现, 降低access_token
冲突率, 增加服务稳定性.
部署微信JS-SDK授权回调页面, 减小应用层压力.
config
公众号全局配置数据, 包括接口Token, 自动回复设置.
server
接收微信发出的普通消息和事件推送等请求, 并按配置做出响应, 未做对应配置则按微信要求返回success
.
此部分核心代码由aCayF/lua-resty-wechat做重构修改而来.
使用config.autoreplyurl
, 配置后台处理服务地址, 转发处理并响应复杂的微信消息. (依赖pintsized/lua-resty-http)
proxy_access_token
使用Redis缓存access_token
和jsapi_ticket
, 定时自动调用微信服务更新, 支持分布式更新.
proxy
代理调用微信公众平台API接口, 自动添加access_token
参数.
proxy_access_filter
过滤客户端IP, 限制请求来源.
oauth
jssdk_config
nginx配置:
http { lua_package_path 'path to lua files'; resolver 114.114.114.114; lua_shared_dict wechat 1M; # 利用共享内存保持单例定时器 init_by_lua ' ngx.shared.wechat:delete("updater") -- 清除定时器标识 require("resty.wechat.config") '; init_worker_by_lua ' local ok, err = ngx.shared.wechat:add("updater", "1") -- 单进程启动定时器 if not ok or err then return end require("resty.wechat.proxy_access_token")() '; server {location /wechat-server { content_by_lua ' require("resty.wechat.server")() '; }location /wechat-proxy/ { rewrite_by_lua ' require("resty.wechat.proxy")("wechat-proxy") -- 参数为location路径 '; access_by_lua ' require("resty.wechat.proxy_access_filter")() '; proxy_pass https://api.weixin.qq.com/; }location /wechat-baseoauth { # param: goto rewrite_by_lua ' require("resty.wechat.oauth").base_oauth("path to /wechat-redirect") '; }location /wechat-useroauth { # param: goto rewrite_by_lua ' require("resty.wechat.oauth").userinfo_oauth("path to /wechat-redirect") '; }location /wechat-redirect { rewrite_by_lua ' require("resty.wechat.oauth").redirect() '; }location /wechat-jssdk-config { # GET/POST, param: url, [api] add_header Access-Control-Allow-Origin "if need cross-domain call"; content_by_lua ' require("resty.wechat.jssdk_config")() '; } } }
网页注入JS-SDK权限:
$.ajax({ url: "url path to /wechat-jssdk-config", data: {url: window.location.href,api: "onMenuShareTimeline|onMenuShareAppMessage|onMenuShareQQ|onMenuShareWeibo|onMenuShareQZone" }, success: function(response) {wx.config(response); }});$.ajax({ url: "url path to /wechat-jssdk-config", data: {url: window.location.href }, success: function(response) {wx.config({ appId: response.appId, timestamp: response.timestamp, nonceStr: response.nonceStr, signature: response.signature, jsApiList: [ 'onMenuShareTimeline', 'onMenuShareAppMessage', 'onMenuShareQQ', 'onMenuShareWeibo', 'onMenuShareQZone' ]}); }});
使用Java解析代理网页授权获得的cookie
Map authInfo = JSON.parseObject(decryptAES(unBase64("cookie value"), getKey("AES key")));// 默认AES key: "vFrItmxI9ct8JbAg"// 配置于config.lua -> cookie_aes_key// 依赖方法import com.alibaba.fastjson.JSON;import com.google.common.base.Charsets;import javax.crypto.Cipher;import javax.crypto.spec.SecretKeySpec;import java.security.Key;public StringBuilder padding(String s, char letter, int repeats) {StringBuilder sb = new StringBuilder(s);while (repeats-- > 0) {sb.append(letter); }return sb; }public String padding(String s) {return padding(s, '=', s.length() % 4).toString(); }public byte[] unBase64(String value) {return org.apache.commons.codec.binary.Base64.decodeBase64(padding(value)); }public String string(byte[] bytes) {return new String(bytes, Charsets.UTF_8); }public String decryptAES(byte[] value, Key key) {try {Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");cipher.init(Cipher.DECRYPT_MODE, key);byte[] decrypted = cipher.doFinal(value);return string(decrypted); } catch (Exception e) {throw new RuntimeException(e); } }public byte[] bytes(String str) {return str == null ? null : str.getBytes(Charsets.UTF_8); }public Key keyFromString(String keyString) {return new SecretKeySpec(bytes(keyString), "AES"); }public Key getKey(String key) {if (key.length() >= 16) {return keyFromString(key.substring(0, 16)); }StringBuilder sb = new StringBuilder(key);while (sb.length() < 16) {sb.append(key); }return keyFromString(sb.toString().substring(0, 16)); }