[英]Async/Await not waiting for promise to finish
I have this post route: 我有这样的帖子路线:
app.post("/new", async (req, res) => {
const Lob = require("lob")({ apiKey: keys.LOB_API });
let toAddress = await lobFuncs.toAddress(req.body.addrLine1, Lob);
console.log("test");
});
The toAddress() function looks like this: toAddress()函数如下所示:
toAddress: async (address, Lob) => {
await this.parseGoogleCiv(address, obj => {
console.log(obj);
});
},
parseGoogleCiv: async (address, callback) => {
address = address
.trim()
.split(" ")
.join("%20");
let URL = "some long URL"
await request(URL, function(err, res) {
if (err) {
console.log(err);
} else {
let body = JSON.parse(res.body);
callback(body);
}
});
}
But this is my output... 但这是我的输出...
test
body
The "test" output should come after the body output. “测试”输出应在正文输出之后。
Question: What's going on here? 问题:这是怎么回事? To the best of my knowledge I think I did all the async/awaits correctly seeing as I'm not getting an promise errors.
据我所知,我认为我没有正确地执行所有异步/唤醒操作,因为我没有收到承诺错误。 Any ideas?
有任何想法吗?
The problem is that you basically await nothing in your parseGoogleCiv function. 问题在于您基本上不等待parseGoogleCiv函数中的任何事情。 May do:
可以做:
parseGoogleCiv: async (address) => {
address = address
.trim()
.split(" ")
.join("%20");
let URL = "some long URL"
try {
return JSON.parse(
(await new Promise((resolve,rej) => request(URL, function(err, res) {
if(err) return rej(err);
resolve(res);
}))).body
);
} catch(err){
console.log(err);
}
}
This is probably more elegant if you use the promisified request version : 如果使用承诺的请求版本,这可能会更优雅:
parseGoogleCiv(address){
address = address
.trim()
.split(" ")
.join("%20");
const url = "someurl";
return request(url)
.then(res => JSON.parse( res.body ))
.catch( err => console.log(err));
}
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