Created
June 24, 2023 16:35
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| export class Semaphore { | |
| private concurrency: number | |
| private currentCount: number | |
| private queue: (() => void)[] | |
| constructor(concurrency: number) { | |
| this.concurrency = concurrency | |
| this.currentCount = 0 | |
| this.queue = [] | |
| } | |
| wait() { | |
| return new Promise<void>((resolve) => { | |
| const task = () => { | |
| this.currentCount++ | |
| resolve() | |
| } | |
| if (this.currentCount < this.concurrency) { | |
| task() | |
| } else { | |
| this.queue.push(task) | |
| } | |
| }) | |
| } | |
| release() { | |
| this.currentCount-- | |
| if (this.queue.length > 0) { | |
| const nextTask = this.queue.shift() | |
| nextTask?.() | |
| } | |
| } | |
| } | |
| const semaphore = new Semaphore(3) | |
| this.http = axios.create() | |
| this.http.interceptors.request.use((config) => { | |
| return semaphore.wait().then(() => { | |
| return config | |
| }) | |
| }) | |
| this.http.interceptors.response.use( | |
| (response) => { | |
| semaphore.release() | |
| return response | |
| }, | |
| (error) => { | |
| semaphore.release() | |
| return Promise.reject(error) | |
| }, | |
| ) |
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