Created
March 2, 2021 17:22
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fetch() operations
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export class NetworkError extends Error { | |
/** | |
* @param {string} message | |
* @param {number} status | |
*/ | |
constructor(message, status) { | |
super(); | |
this.status = status; | |
} | |
} | |
/** @type {(error: Error|NetworkError|any) => void} */ | |
let errorHandler = null; | |
/** | |
* @param {(error: Error|NetworkError|any) => Promise<any>} fn | |
* @return {void} | |
*/ | |
export function setDefaultErrorHandler(fn) { | |
errorHandler = fn; | |
} | |
/** | |
* @param {Error|NetworkError|any} error | |
* @return {void} | |
*/ | |
export function onPostError(error) { | |
if (errorHandler) { | |
errorHandler(error); | |
return; | |
} | |
throw error; | |
} | |
/** | |
* @param {string} url | |
* @param {Object=} data | |
* @param {Object} options | |
* @param {number=} options.timeout Timeout in milliseconds | |
* @param {string=} options.format response format | |
* @param {boolean=} options.credentials response format | |
* @param {Object<string,string>=} options.headers headers | |
* @return {Promise<any>} | |
*/ | |
export function postJson(url, data = {}, options = { timeout: 60000, format: 'json', headers: {} }) { | |
/** @type {RequestInit} */ | |
const fetchOptions = { | |
method: 'POST', | |
credentials: options.credentials === false ? 'omit' : 'include', | |
mode: 'cors', | |
headers: { | |
'Content-Type': 'application/json', | |
...options.headers, | |
}, | |
body: JSON.stringify(data), | |
}; | |
const promise = fetch(url, fetchOptions).then((response) => { | |
if (response.status >= 400) { | |
const err = new NetworkError(response.statusText, response.status); | |
err.status = response.status; | |
throw err; | |
} | |
if (response.status === 200) { | |
if (options.format === 'string') { | |
return response.text(); | |
} | |
return response.json(); | |
} | |
if (response.status === 204) { | |
if (options.format === 'string') { | |
return ''; | |
} | |
return {}; | |
} | |
// No content | |
return null; | |
}); | |
if (options.timeout) { | |
return timeoutPromise(options.timeout, promise); | |
} | |
return promise; | |
} |
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