我正在尝试使用continuation-local-storage包从一个不易访问的点访问当前的express请求/响应。
我创建了以下中间件:
var createNamespace = require('continuation-local-storage').createNamespace,
getNamespace = require('continuation-local-storage').getNamespace;
const domain = 'ns.cls';
exports.configure = function(app) {
createNamespace(domain);
app.use(function(req, res, next) {
exports.set(req, res, "callcontext", { req, res });
next();
});
};
exports.set = function(req, res, name, value) {
var namespace = getNamespace(domain);
namespace.bindEmitter(req);
namespace.bindEmitter(res);
namespace.run(() => namespace.set(name, value));
};
exports.get = function(name) {
var namespace = getNamespace(domain);
return namespace.get(name);
};
exports.getCallContext = function() {
return exports.get("callcontext");
};
但是当我尝试访问上下文时,它是未定义的:
var localStorage = require('../middleware/local-storage');
module.exports = function(doc, ctx) {
var callContext = localStorage.getCallContext();
console.log("value: " + callContext);
};
有没有人有任何想法?
提前致谢,
标记
答案 0 :(得分:2)
createNameSpace应该被调用一次。此外,您在线上有错误
exports.set(req, res, "callcontext", { req, res });
应该是
exports.set(req, res, "callcontext", { key: value });
这就是我使用它的方式:
设置
var session = require('continuation-local-storage').createNamespace('session')
app.use(function(req, res, next) {
session.bindEmitter(req);
session.bindEmitter(res);
session.run(function() {
session.set('req', req);
next();
});
});
获取
var session = require('continuation-local-storage').getNamespace('session')
session.get('req')