/**
* UserscriptAPIWeb
*
* 依赖于 `UserscriptAPI`。
*
* 需要通过 `@grant` 引入 `GM_xmlhttpRequest` 或 `GM_download`。
* @version 1.4.0.20240522
* @author Laster2800
* @see {@link https://gitee.com/liangjiancang/userscript/tree/master/lib/UserscriptAPI UserscriptAPI}
*/
class UserscriptAPIWeb {
/**
* @param {UserscriptAPI} api `UserscriptAPI`
* @param {(xhr: GM_XHR) => void} [api.options.web.preproc] 请求预处理
*/
constructor(api) {
this.api = api
api.options.web ??= { preproc: null }
}
/**
* @typedef {XMLHttpRequest} GM_XHR GM 定义的类 `XMLHttpRequest` 对象
*/
/**
* 发起网络请求，获取 `GM_XHR`
* @param {Object} details 定义及细节类似于 `GM_xmlhttpRequest` `details`
* @param {'GET' | 'HEAD' | 'POST'} [details.method='GET'] `METHOD`
* @param {string} [details.url] `URL`
* @param {number} [details.timeout] 超时时间
* @param {(xhr: GM_XHR) => void} [details.ontimeout] 超时回调
* @param {(xhr: GM_XHR) => void} [details.onerror] 错误回调
* @param {(xhr: GM_XHR) => void} [details.onload] 加载回调
* @param {string | URLSearchParams | FormData} [details.data] `DATA`
* @param {Object} [options] 选项
* @param {(xhr: GM_XHR) => boolean} [options.check] 检查 `GM_XHR` 是否符合条件
* @param {boolean} [options.throwOnFailed = true] 失败时是否抛出异常，否则打印错误信息
* @returns {Promise<GM_XHR>} `GM_XHR`
* @throws 等待超时、达成终止条件、等待错误时抛出
* @see {@link https://www.tampermonkey.net/documentation.php#GM_xmlhttpRequest GM_xmlhttpRequest}
*/
requestXHR(details, options) {
if (details) {
const { api } = this
const { check, throwOnFailed = true } = options ?? {}
return new Promise((resolve, reject) => {
if (details.data && details.data instanceof URLSearchParams) {
details.data = details.data.toString()
details.headers = {
'content-type': 'application/x-www-form-urlencoded',
...details.headers,
}
if (GM_info.scriptHandler === 'Violentmonkey' && !details.headers.origin) {
details.headers.origin = ''
}
}
details.ontimeout ??= xhr => fail('request: TIMEOUT', details, xhr)
details.onerror ??= xhr => fail('request: ERROR', details, xhr)
details.onload ??= xhr => {
if (check && !check(xhr)) {
fail('request: CHECK-FAIL', details, check, xhr)
if (throwOnFailed) return
}
resolve(xhr)
}
GM_xmlhttpRequest(details)
function fail(msg, ...cause) {
if (throwOnFailed) {
reject(new Error(msg, cause.length > 0 ? { cause } : undefined))
} else {
api.logger.error(msg, ...cause)
}
}
})
}
}
/**
* 发起网络请求，获取解析结果
* @param {Object} details 定义及细节类似于 `GM_xmlhttpRequest` `details`
* @param {'GET' | 'HEAD' | 'POST'} [details.method='GET'] `METHOD`
* @param {string} [details.url] `URL`
* @param {number} [details.timeout] 超时时间
* @param {(xhr: GM_XHR) => void} [details.ontimeout] 超时回调
* @param {(xhr: GM_XHR) => void} [details.onerror] 错误回调
* @param {(xhr: GM_XHR) => void} [details.onload] 加载回调
* @param {string | URLSearchParams | FormData} [details.data] `DATA`
* @param {Object} [options] 选项
* @param {'json' | 'check' | 'silentCheck'} [options.parser='json'] ```text
*    json: 返回 JSON.parse(resp)
*    check: 返回 check(resp, xhr)，检查失败时打印信息
*    silentCheck: 返回 check(resp, xhr)，检查失败时不打印信息
* ```
* @param {(resp: Object, xhr: GM_XHR) => boolean} [options.check] 检查 `GM_XHR` 是否符合条件
* @param {boolean} [options.throwOnFailed=true] 失败时是否抛出异常，否则打印错误信息
* @returns {Promise<Object>} 解析结果
* @see {@link https://www.tampermonkey.net/documentation.php#GM_xmlhttpRequest GM_xmlhttpRequest}
*/
async request(details, options) {
const { api } = this
const { parser = 'json', check, throwOnFailed = true } = options ?? {}
try {
try {
await api.options.web.preproc?.(details)
} catch {
fail('request: PREPROC', api.options.web.preproc, details)
}
const xhr = await this.requestXHR(details)
let resp = null
try {
resp = JSON.parse(xhr.response)
} catch {
fail('request: PARSE', details, xhr)
return null
}
const checkR###lt = !check || check(resp, xhr)
if (parser === 'silentCheck') {
return checkR###lt
} else if (parser === 'check') {
if (!checkR###lt) {
api.logger.error('request: CHECK-FAIL', details, check, resp, xhr)
}
return checkR###lt
} else {
if (!checkR###lt) {
fail('request: CHECK-FAIL', details, check, resp, xhr)
}
return resp
}
} catch (e) {
if (throwOnFailed) {
throw e
} else {
api.logger.error(e)
}
}
function fail(msg, ...cause) {
if (throwOnFailed) {
throw new Error(msg, cause.length > 0 ? { cause } : undefined)
} else {
api.logger.error(msg, ...cause)
}
}
}
/**
* 下载资源
* @param {Object} details 定义及细节同 `GM_download` `details`
* @returns {() => void} 用于终止下载的方法
* @see {@link https://www.tampermonkey.net/documentation.php#GM_download GM_download}
*/
download(details) {
if (details) {
const { api } = this
try {
let { name } = details
if (name.includes('.')) {
// name「.」后内容会被误认为后缀导致一系列问题，从 URL 找出真正的后缀名以修复之
let parts = details.url.split('/')
const last = parts.at(-1).split('?')[0]
if (last.includes('.')) {
parts = last.split('.')
name = `${name}.${parts.at(-1)}`
} else {
name = name.replaceAll('.', '_') // 实在找不到后缀时才用这种消极的方案
}
details.name = name
}
details.onerror ??= (error, details) => api.logger.error('download: ERROR', error, details)
details.ontimeout ??= () => api.logger.error('download: TIMEOUT')
GM_download(details)
} catch (e) {
api.logger.error('download: ERROR', e)
}
}
return () => {}
}
}
/* global UserscriptAPI */
// eslint-disable-next-line no-lone-blocks
{ UserscriptAPI.registerModule('web', UserscriptAPIWeb) }