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fix: Improve Lock Manager HTTP layer
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pit-tester
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Feb 13, 2024
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| import fetch, { RequestInit, Response } from "node-fetch" | ||
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| import { logger } from "../logger.js" | ||
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| export type FetchParams = { | ||
| endpoint: string, | ||
| options: RequestInit | ||
| } | ||
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| export type RetryOptions = { | ||
| retries: number, | ||
| retryDelay: number, | ||
| fetchParams: FetchParams | ||
| } | ||
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| export class HttpErrorOptions { | ||
| cause?: Error | ||
| responseData?: string | unknown | ||
| } | ||
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| export class HttpError extends Error { | ||
| readonly type: string = "HttpError" | ||
| responseData?: string | unknown | ||
| constructor( | ||
| readonly method: string, | ||
| readonly endpoint: string, | ||
| readonly status: number, | ||
| readonly text: string, | ||
| private options: HttpErrorOptions | ||
| ){ | ||
| super(text, { cause: options.cause }) | ||
| this.responseData = options.responseData | ||
| } | ||
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| toString(): string { | ||
| return JSON.stringify({ method: this.method, endpoint: this.endpoint, status: this.status, text: this.text, responseData: this.responseData, cause: this.cause }) | ||
| } | ||
| } | ||
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| export const invoke = async (options: RetryOptions, apiBody: Object) => { | ||
| let attempts = 1 | ||
| while (options.retries > 0) { | ||
| logger.info("http-client.invoke(): attempt %s of %s invoking %s", attempts, options.retries, JSON.stringify(options.fetchParams)) | ||
| try { | ||
| return await invokeApi(options.fetchParams, apiBody) | ||
| } catch (error: unknown) { | ||
| logger.warn("http-client.invoke(): attempt %s of %s invoking %s. Error: %s", attempts, options.retries, JSON.stringify(options.fetchParams), error) | ||
| if (attempts < options.retries) { | ||
| attempts++ | ||
| await sleep(options.retryDelay) | ||
| continue | ||
| } | ||
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| logger.warn("http-client.invoke(): failed to invoke %s. No more attempts left, giving up", JSON.stringify(options.fetchParams)) | ||
| throw new Error(`Failed to fetch ${ options.fetchParams.endpoint } after ${ attempts } attempts`, { cause: error }) | ||
| } | ||
| } | ||
| } | ||
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| const invokeApi = async (params: FetchParams, apiBody: Object): Promise<unknown | string> => { | ||
| const resp = await fetch(params.endpoint, { ...params.options, body: JSON.stringify(apiBody) }) | ||
| const readPayload = async (response: Response): Promise<unknown | string> => { | ||
| const ctHeader = "content-type" | ||
| const hdrs = response.headers | ||
| if (hdrs.has(ctHeader) && `${ hdrs.get(ctHeader) }`.toLowerCase().startsWith("application/json")) { | ||
| try { | ||
| return await response.json() | ||
| } catch (e) { | ||
| logger.warn("Unable to parse JSON when handling response from '%s', handling will fallback to reading the payload as text. Parsing error: %s", params.endpoint, e) | ||
| return await response.text() | ||
| } | ||
| } else { | ||
| return await response.text() | ||
| } | ||
| } | ||
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| if (resp.ok) { | ||
| logger.info("invokeApi(): resp was ok, reading payload") | ||
| return await readPayload(resp) | ||
| } else { | ||
| logger.info("invokeApi(): resp was not ok, raising error") | ||
| throw new HttpError( | ||
| params.options.method, | ||
| params.endpoint, | ||
| resp.status, | ||
| resp.statusText, | ||
| { responseData: await readPayload(resp) }) | ||
| } | ||
| } | ||
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| export const sleep = (time: number) => new Promise(resolve => setTimeout(resolve, time)) |
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