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[英]How to Configure AWS X-Ray for node.js app not using Express middleware?
[英]AWS X-Ray with Node.JS Express and request
因此,我正在嘗試通過我的Express應用程序實現X射線。 我有我的app.js文件,並且內部引用了一個路由器文件。
我的項目結構:
project/ routes/ index.js app.js
app.js:
var indexRouter = require("./routes/index")
...
app.use("/", indexRouter)
...
index.js:
const AWSXRay = require("aws-xray-sdk")
const request = require("request")
router.post("/xray", async function(req, res, next) {
let app = req.app
app.use(AWSXRay.express.openSegment("MyApp"))
try {
console.log(AWSXRay.getSegment()) // this succesfully gets segment
AWSXRay.captureAsyncFunc("send", function(subsegment) {
request.get("http://www.google.com", { XRaySegment: subsegment }, function() {
res.json({
success: "success"
})
subsegment.close()
})
} catch (err) {
next(err)
}
app.use(AWSXRay.express.closeSegment())
})
我正在關注自動模式示例:通過AWS文檔( https://docs.aws.amazon.com/xray-sdk-for-nodejs/latest/reference/index.html )中的異步函數調用進行捕獲,但是我出現錯誤消息:“無法從上下文中獲取當前子/段。”
誰能讓我知道我在做什么錯?
您應該將app.use(AWSXRay.express.openSegment("MyApp"))
代碼移動到app.use("/", indexRouter)
上方的app.js
然后將app.use(AWSXRay.express.closeSegment())
移動到app.use(AWSXRay.express.closeSegment())
app.use("/", indexRouter)
。
如果您查看提供的鏈接中引用的代碼,則會注意到openSegment
和closeSegment
在路線之外,而不是在路線內(因為您當前擁有它們)
鏈接中的代碼可供參考:
var app = express();
//...
var AWSXRay = require('aws-xray-sdk');
app.use(AWSXRay.express.openSegment('defaultName')); //required at the start of your routes
app.get('/', function (req, res) {
res.render('index');
});
app.use(AWSXRay.express.closeSegment()); //Required at the end of your routes / first in error handling routes
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