[英]Nodejs multiple axios get requests return a Primise
如何從多個axios
獲取請求中返回Promise
?
我有以下代碼。
async function main() {
const URL_1 = 'abc.com/get1/data1';
const result_1 = await getData(URL_1);
const URL_2 = 'abc.com/get2/data2';
const result_2 = await getData(URL_2);
}
async function getData(dataURI) {
let getURI = dataURI;
const config = {
headers: {
Authorization: `Bearer ${my-token-text}`,
},
};
var finalData = [];
// until we get the next URL keep sending the requests
while (getURI != null) {
try {
const getResult = await axios.get(getURI, config);
if (getResult.status === 200) {
const receivedData = getResult.data.value;
finalData.push(...receivedData);
// check if we have nextLink in the payload
if (Object.prototype.hasOwnProperty.call(getResult.data, 'nextLink')) {
getURI = getResult.data.nextLink;
} else {
getURI = null;
return finalData;
}
}
} catch (err) {
break;
}
}
return null;
}
我想要實現的是:
async function main() {
const URL_1 = 'abc.com/get1/data1';
const result_1 = getData(URL_1);
promisesArray.push(result_1);
const URL_2 = 'abc.com/get2/data2';
const result_2 = getData(URL_2);
promisesArray.push(result_2);
await Promise.allSettled(promisesArray).then((results) => {
console.log('Promise All Done: ', results);
});
}
這就是為什么我可以並行執行所有請求的原因。
但是,當我更新 function getData(dataURI)
以返回return new Promise
,我收到await axios
錯誤。
async function getData(dataURI) {
return new Promise((resolve, reject) => {
// Same code as above
});
}
我得到錯誤:
SyntaxError: await is only valid in async function
由於Promise
不是異步的,我無法在 Promise 中等待。
你有沒有嘗試過:
return new Promise(async (resolve, reject) => {
// Same code as above
});
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