if 语句失败时重新运行函数
我想在我的 Discord 机器人(使用 discord.js)中使用来自 reddit (reddit.com/r/SUBREDDIT/random/.json) 的随机 api.获取图像工作正常，直到帖子不包含有效链接，但我希望它在一个单独的文件中的函数中与其他与 api 相关的东西.我的 api.js 中的函数是:
I want to use the random api from reddit (reddit.com/r/SUBREDDIT/random/.json) in my Discord bot (using discord.js). Getting images works fine until the post doens't include a valid link, but I want it in a function in a seperate file with other api-related stuff. The function in my api.js is:
module.exports.randomReddit = async function randomReddit(reddit) {
return new Promise((res, rej) => {
axios.get(`https://www.reddit.com/r/${reddit}/random/.json`)
.then(function (response) {
res(response[0].data.children[0].data);
})
.catch(function (error) {
rej(error);
})
})
}
在我的代码中，我目前有:
In my code, I currently have:
for (let i = 0; i < 10; i++) {
randomReddit('car').then(data => {
let regex = /.(jpg|gif|png)$/;
let test = regex.test(data.url);
if (test) message.channel.send(data.url)
continue;
})
}
随机 reddit 帖子并不总是包含有效链接.我想在帖子没有有效链接之前再次运行该功能(randomReddit).在这种情况下，可以发送图像.我尝试了一些不同的方法，但它们根本不起作用..
The random reddit post doesn't always include a valid link. I would like to run the function (randomReddit) again when a post doesn't have one until a post does have a valid link. In that case, the image may be sent. I tried a few different things but they didn't work at all..
提前谢谢你.
推荐答案
使用像 承诺重试
async function randomReddit(reddit) {
return new Promise((res, rej) => {
axios.get(`https://www.reddit.com/r/${reddit}/random/.json`)
.then(function (response) {
res(response[0].data.children[0].data);
})
.catch(function (error) {
rej(error);
})
})
}
promiseRetry(function (retry) {
return randomReddit('test')
.then(data => {
let regex = /.(jpg|gif|png)$/;
let test = regex.test(data.url);
if (test) return data;
return retry();
})
}).then(function (value) {
// Do smthg
});
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