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VistasNode/Express return error to main function?
I'm in a situation where I have a POST route that calls a function multiple times. I want the request to return an error if the called function returns an error, but I am not sure how to achieve this. See this image:
This is my code:
function POSTcord(lat, lng) {
axios
.post(process.env.SOS_POST_URL + process.env.SOS_POST_CODE, {
batteryLevel: 100,
longitude: lng,
latitude: lat
})
.then(res => {
console.log(`statusCode: ${res.status}`)
})
.catch(error => {
console.error(error.message);
})
}
router.post('/test', async (req, res) => {
let passedCords = req.body;
try {
for (const cord of passedCords) {
POSTcord(cord.lat, cord.lng);
}
res.status(200).json({status:"success", message: "hello!"});
} catch (err) {
console.error(err.message);
res.status(500).send("Server error");
}
});
I want the route /test to return an error if the function POSTcord catches an error somewhere in the loop. Any ideas on this? I'm thinking I could pass res to POSTcord function, but that didn't work. Thankful for any input :)
·
Juan Pablo Isaza
1 Respuestas
Responde la pregunta0
You need to return the Promise and make sure the error is thrown/rejected:
Either do this:
function POSTcord(lat, lng) {
return axios // <--------------- THIS IS VERY IMPORTANT
.post(process.env.SOS_POST_URL + process.env.SOS_POST_CODE, {
batteryLevel: 100,
longitude: lng,
latitude: lat
})
.then(res => {
console.log(`statusCode: ${res.status}`)
})
.catch(error => {
console.error(error.message);
throw error; // <----------- ALSO DO THIS
})
}
Or do this:
function POSTcord(lat, lng) {
return axios // <--------------- THIS IS VERY IMPORTANT
.post(process.env.SOS_POST_URL + process.env.SOS_POST_CODE, {
batteryLevel: 100,
longitude: lng,
latitude: lat
})
.then(res => {
console.log(`statusCode: ${res.status}`)
})
// DON'T CATCH THE ERROR!!
}
Then all you need to do is await to get the error:
router.post('/test', async (req, res) => {
let passedCords = req.body;
try {
for (const cord of passedCords) {
await POSTcord(cord.lat, cord.lng); // DO THIS FOR CATCH TO WORK
}
res.status(200).json({status:"success", message: "hello!"});
} catch (err) {
console.error(err.message);
res.status(500).send("Server error");
}
});
If you want to call POSTcord() in parallel you can await using Promise.all():
router.post('/test', async (req, res) => {
let passedCords = req.body;
try {
let promises = [];
for (const cord of passedCords) {
let p = POSTcord(cord.lat, cord.lng);
promises.push(p);
}
await Promise.all(promises); // DO THIS FOR CATCH TO WORK
res.status(200).json({status:"success", message: "hello!"});
} catch (err) {
console.error(err.message);
res.status(500).send("Server error");
}
});
·
Juan Pablo Isaza
Denunciar
Responde la pregunta