[英]Wait on each for loop iteration to finish before starting the next in nodejs
I have an array with URLs separated by a comma.我有一个 URL 以逗号分隔的数组。 I can't seem to manage to get the loop to finish each iteration before starting the next.
在开始下一次迭代之前,我似乎无法设法让循环完成每次迭代。 This is my code:
这是我的代码:
const options = {
method: 'post',
headers: {
'Authorization': 'Basic '+Buffer.from(`${user}:${password}`).toString('base64')
},
}
for (let url of urls.split(",")) {
console.log(url);
await axios.get(url, options)
.then(response => {
console.log(url);
<--Rest of my code-->
})
}
I can see that the first console.log() runs at once, so the for loop is not waiting for one iteration to finish before starting the next.我可以看到第一个 console.log() 立即运行,因此 for 循环不会在开始下一次迭代之前等待一次迭代完成。
I have tried several different solutions I found here to try and make this async, including:我尝试了几种不同的解决方案,我在这里找到了尝试使这个异步,包括:
like this:像这样:
const calls = async (urls2) => {
for (let url of urls2.split(",")) {
await axios.get(url, options)
.then(response => {
console.log(url);
<--Rest of my code-->
})
}
}
calls(urls).catch(console.error);
I assume this last one failed because, while the function is async, everything inside of it is still synchronous.我认为最后一个失败了,因为虽然该函数是异步的,但它内部的所有内容仍然是同步的。
All I need is for each iteration of the loop to finish before the next one starts.我所需要的只是让循环的每次迭代在下一次开始之前完成。 What is the simplest way to do this?
什么是最简单的方法来做到这一点?
const calls = async(urls2)=>{
for (let url of urls2.split(",")) {
const response = await axios.get(url,options); //will wait for response
console.log(response.data);
//rest of the code
}
}
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