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import { request } from 'https'
import { brotliDecompressSync, gunzipSync, inflateSync } from 'zlib'
import type {
HTTPBody,
HTTPHeaders,
HTTPQueryParams,
HTTPServerResponse,
} from './request.inteface'
import { HoyoAPIError } from '../error'
import { delay, generateDS } from './request.helper'
import { Cache } from '../cache'
import { createHash } from 'crypto'
import { Language } from '../language'
/**
* Class for handling HTTP requests with customizable headers, body, and parameters.
*
* @class
* @internal
* @category Internal
*/
export class HTTPRequest {
/**
* Query parameters for the request.
*/
private params: HTTPQueryParams = {}
/**
* Body of the request.
*/
private body: HTTPBody = {}
/**
* The cache used for the request
*/
private cache: Cache
/*
* Headers for the request.
*/
private headers: HTTPHeaders = {
Accept: 'application/json, text/plain, */*',
'Content-Type': 'application/json',
'Accept-Encoding': 'gzip, deflate, br',
'sec-ch-ua':
'"Chromium";v="112", "Microsoft Edge";v="112", "Not:A-Brand";v="99"',
'sec-ch-ua-mobile': '?0',
'sec-ch-ua-platform': '"Windows"',
'sec-fetch-dest': 'empty',
'sec-fetch-mode': 'cors',
'sec-fetch-site': 'same-site',
'user-agent':
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36 Edg/112.0.1722.46',
'x-rpc-app_version': '1.5.0',
'x-rpc-client_type': '5',
'x-rpc-language': 'en-us',
}
/**
* Flag indicating whether Dynamic Security is used.
*/
private ds = false
/**
* The number of request attempts made.
*/
private retries = 1
public http?: {
response?: object
request?: object
code?: number
}
constructor(cookie?: string) {
if (cookie) this.headers.Cookie = cookie
this.cache = new Cache()
}
/**
* Sets search parameters or query parameter.
*
* @param params - An object of query parameter to be set.
* @returns Returns this Request object.
*/
setQueryParams(params: HTTPQueryParams) {
this.params = { ...this.params, ...params }
return this
}
/**
* Set Body Parameter
*
* @param body - RequestBodyType as object containing the body parameters.
* @returns This instance of Request object.
*/
setBody(data: HTTPBody) {
this.body = { ...this.body, ...data }
return this
}
/**
* Set Referer Headers
*
* @param url - The URL string of referer
* @returns The updated Request instance.
*/
setReferer(url: string | URL) {
this.headers.Referer = url.toString()
this.headers.Origin = url.toString()
return this
}
/**
* Set Language
*
* @param lang Language Language that used for return of API (default: Language.ENGLISH).
* @returns {this}
*/
setLang(lang: string): this {
this.headers['x-rpc-language'] = Language.parseLang(lang)
return this
}
/**
* Set to used Dynamic Security or not
*
* @param flag boolean Flag indicating whether to use dynamic security or not (default: true).
* @returns {this} The current Request instance.
*/
setDs(flag = true): this {
this.ds = flag
return this
}
/**
* Send the HTTP request.
*
* @param url - The URL to send the request to.
* @param method - The HTTP method to use. Defaults to 'GET'.
* @param ttl - The TTL value for the cached data in seconds.
* @returns A Promise that resolves with the response data, or rejects with a HoyoAPIError if an error occurs.
* @throws {HoyoAPIError} if an error occurs rejects with a HoyoAPIError
*/
async send(
url: string,
method: 'GET' | 'POST' = 'GET',
ttl = 60,
): Promise<HTTPServerResponse> {
// Internal NodeJS Fetch
const fetch = (url: string, method: string) => {
return new Promise<HTTPServerResponse>((resolve, reject) => {
const hostname = new URL(url)
const queryParams = new URLSearchParams(hostname.searchParams)
Object.keys(this.params).forEach((val) => {
/* c8 ignore next */
queryParams.append(val, this.params[val]?.toString() ?? '')
})
hostname.search = queryParams.toString()
const options: RequestOptions = {
method,
headers: this.headers,
}
const client = request(hostname, options, (res: IncomingMessage) => {
if (res.statusCode === 429) {
// If the status code is 429, return a resolved promise with a response object
return resolve({
response: {
data: null,
message: 'Too Many Request',
retcode: 429,
},
status: {
code: 429,
message: 'Too Many Request',
},
headers: res.headers,
body: this.body,
params: this.params,
})
} else if (
res.statusCode &&
res.statusCode >= 400 &&
res.statusCode < 600
) {
// If the status code is between 400 and 599 (inclusive), reject the promise with an HoyoAPIError
reject(
new HoyoAPIError(
`HTTP ${res.statusCode}: ${res.statusMessage}`,
res.statusCode,
{
response: res.statusMessage,
request: {
params: this.params,
body: this.body,
headers: this.headers,
},
},
),
)
}
const stream: Buffer[] = []
res.on('data', (chunk: Buffer) => {
stream.push(chunk)
})
res.on('end', () => {
let buffer = Buffer.concat(stream)
// Handling content compression
const encoding = res.headers['content-encoding']
if (encoding === 'gzip') {
buffer = gunzipSync(buffer)
} else if (encoding === 'deflate') {
buffer = inflateSync(buffer)
} else if (encoding === 'br') {
buffer = brotliDecompressSync(buffer)
}
// Parse to UTF-8
const responseString = buffer.toString('utf8')
let response: any
// Parse body to JSON
if (res.headers['content-type'] === 'application/json') {
try {
response = JSON.parse(responseString)
resolve({
response: {
data: response?.data ?? null,
message: response?.message ?? '',
retcode: response?.retcode ?? -1,
},
status: {
/* c8 ignore next */
code: res.statusCode ?? -1,
message: res.statusMessage,
},
headers: res.headers,
body: this.body,
params: this.params,
})
} catch (error) {
reject(
new HoyoAPIError('Failed to parse response body as JSON'),
)
}
} else {
reject(
new HoyoAPIError(
'Response Content-Type is not application/json',
),
)
}
})
res.on('error', (err: Error) => {
/* c8 ignore next */
reject(new HoyoAPIError(err.message))
})
})
if (method === 'POST') {
client.write(JSON.stringify(this.body))
}
client.end()
})
}
const cacheKey = createHash('md5')
.update(
JSON.stringify({
url,
method,
body: this.body,
params: this.params,
}),
)
.digest('hex')
const cachedResult = this.cache.get(cacheKey)
/* c8 ignore start */
if (cachedResult) {
return cachedResult as HTTPServerResponse
}
/* c8 ignore stop */
if (this.ds) {
this.headers.DS = generateDS()
}
const req = await fetch(url, method)
/* c8 ignore start */
if (
[-1004, -2016, -500_004, 429].includes(req.response.retcode) &&
this.retries <= 120
) {
this.retries++
await delay(1)
return this.send(url, method)
}
/* c8 ignore start */
this.retries = 1
this.body = {}
this.params = {}
this.cache.set(cacheKey, req, ttl)
return req
}
}
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