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chore(user-agent): fix linter warnings (#1174)
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@xDivisionByZerox
xDivisionByZerox authored Jul 30, 2022
1 parent 02ead05 commit 09df73a
Showing 1 changed file with 121 additions and 88 deletions.
209 changes: 121 additions & 88 deletions src/modules/internet/user-agent.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -44,58 +44,41 @@

import type { Faker } from '../..';

export type Arch = 'lin' | 'mac' | 'win';
type OS = 'lin' | 'mac' | 'win';

export function generate(faker: Faker): string {
function rnd(
a?: string[] | number | Record<string, number>,
b?: number
): string | number {
//calling rnd() with no arguments is identical to rnd(0, 100)
a = a || 0;
b = b || 100;

if (typeof b === 'number' && typeof a === 'number') {
// 9/2018 - Added faker random to ensure mersenne and seed
return faker.datatype.number({ min: a, max: b });
}
type Browser = 'chrome' | 'iexplorer' | 'firefox' | 'safari' | 'opera';

if (Array.isArray(a)) {
//returns a random element from array (a), even weighting
return faker.helpers.arrayElement(a);
}

if (a && typeof a === 'object') {
//returns a random key from the passed object; keys are weighted by the decimal probability in their value
return ((obj) => {
const rand = (rnd(0, 100) as number) / 100;
let min = 0;
let max = 0;
let return_val: string;
/**
* Generates a random user-agent.
*
* @param faker An existing faker instance.
*/
export function generate(faker: Faker): string {
const weightedKeyFromObject = <T extends Record<string, number>>(
obj: T
): keyof T => {
//returns a random key from the passed object; keys are weighted by the decimal probability in their value
const rand = faker.datatype.number({ min: 0, max: 100 }) / 100;
let min = 0;
let max = 0;
let return_val: string;

for (const key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
max = obj[key] + min;
return_val = key;
if (rand >= min && rand <= max) {
break;
}
min = min + obj[key];
}
for (const key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
max = obj[key] + min;
return_val = key;
if (rand >= min && rand <= max) {
break;
}

return return_val;
})(a);
min = min + obj[key];
}
}

throw new TypeError(
// eslint-disable-next-line @typescript-eslint/restrict-template-expressions
`Invalid arguments passed to rnd. (${b ? `${a}, ${b}` : a})`
);
}
return return_val;
};

function randomLang(): string | number {
return rnd([
const randomLang = (): string =>
faker.helpers.arrayElement([
'AB',
'AF',
'AN',
Expand Down Expand Up @@ -193,80 +176,113 @@ export function generate(faker: Faker): string {
'YI',
'ZH',
]);
}

function randomBrowserAndOS(): Array<string | number> {
const browser = rnd({
const randomBrowserAndOS = (): [Browser, OS] => {
const browser: Browser = weightedKeyFromObject({
chrome: 0.45132810566,
iexplorer: 0.27477061836,
firefox: 0.19384170608,
safari: 0.06186781118,
opera: 0.01574236955,
});
const os = {
chrome: { win: 0.89, mac: 0.09, lin: 0.02 },
firefox: { win: 0.83, mac: 0.16, lin: 0.01 },
opera: { win: 0.91, mac: 0.03, lin: 0.06 },
safari: { win: 0.04, mac: 0.96 },
iexplorer: ['win'],
};
const os: OS = weightedKeyFromObject(
{
chrome: { win: 0.89, mac: 0.09, lin: 0.02 },
firefox: { win: 0.83, mac: 0.16, lin: 0.01 },
opera: { win: 0.91, mac: 0.03, lin: 0.06 },
safari: { win: 0.04, mac: 0.96 },
iexplorer: { win: 1 },
}[browser]
);

return [browser, rnd(os[browser])];
}
return [browser, os];
};

function randomProc(arch: Arch): string | number {
const randomProc = (arch: OS): string => {
const procs = {
lin: ['i686', 'x86_64'],
mac: { Intel: 0.48, PPC: 0.01, 'U; Intel': 0.48, 'U; PPC': 0.01 },
win: ['', 'WOW64', 'Win64; x64'],
};
return rnd(procs[arch]);
}
const archValue = procs[arch];
const proc = Array.isArray(archValue)
? faker.helpers.arrayElement(archValue)
: weightedKeyFromObject(archValue);

function randomRevision(dots: number): string {
return proc;
};

const randomRevision = (dots: number): string => {
let return_val = '';
//generate a random revision
//dots = 2 returns .x.y where x & y are between 0 and 9
for (let x = 0; x < dots; x++) {
return_val += `.${rnd(0, 9)}`;
return_val += `.${faker.datatype.number({ min: 0, max: 9 })}`;
}
return return_val;
}
};

const version_string = {
net() {
return [rnd(1, 4), rnd(0, 9), rnd(10000, 99999), rnd(0, 9)].join('.');
return [
faker.datatype.number({ min: 1, max: 4 }),
faker.datatype.number({ min: 0, max: 9 }),
faker.datatype.number({ min: 10000, max: 99999 }),
faker.datatype.number({ min: 0, max: 9 }),
].join('.');
},
nt() {
return `${rnd(5, 6)}.${rnd(0, 3)}`;
return [
faker.datatype.number({ min: 5, max: 6 }),
faker.datatype.number({ min: 0, max: 3 }),
].join('.');
},
ie() {
return rnd(7, 11);
return faker.datatype.number({ min: 7, max: 11 });
},
trident() {
return `${rnd(3, 7)}.${rnd(0, 1)}`;
return [
faker.datatype.number({ min: 3, max: 7 }),
faker.datatype.number({ min: 0, max: 1 }),
].join('.');
},
osx(delim?: string) {
return [10, rnd(5, 10), rnd(0, 9)].join(delim || '.');
return [
10,
faker.datatype.number({ min: 5, max: 10 }),
faker.datatype.number({ min: 0, max: 9 }),
].join(delim || '.');
},
chrome() {
return [rnd(13, 39), 0, rnd(800, 899), 0].join('.');
return [
faker.datatype.number({ min: 13, max: 39 }),
0,
faker.datatype.number({ min: 800, max: 899 }),
0,
].join('.');
},
presto() {
return `2.9.${rnd(160, 190)}`;
return `2.9.${faker.datatype.number({ min: 160, max: 190 })}`;
},
presto2() {
return `${rnd(10, 12)}.00`;
return `${faker.datatype.number({ min: 10, max: 12 })}.00`;
},
safari() {
return `${rnd(531, 538)}.${rnd(0, 2)}.${rnd(0, 2)}`;
return [
faker.datatype.number({ min: 531, max: 538 }),
faker.datatype.number({ min: 0, max: 2 }),
faker.datatype.number({ min: 0, max: 2 }),
].join('.');
},
};

const browser = {
firefox(arch: Arch): string {
const browserMap = {
firefox(arch: OS): string {
//https://developer.mozilla.org/en-US/docs/Gecko_user_agent_string_reference
const firefox_ver = `${rnd(5, 15)}${randomRevision(2)}`,
const firefox_ver = `${faker.datatype.number({
min: 5,
max: 15,
})}${randomRevision(2)}`,
gecko_ver = `Gecko/20100101 Firefox/${firefox_ver}`,
proc = randomProc(arch),
os_ver =
Expand All @@ -287,19 +303,21 @@ export function generate(faker: Faker): string {

if (ver >= 11) {
//http://msdn.microsoft.com/en-us/library/ie/hh869301(v=vs.85).aspx
return `Mozilla/5.0 (Windows NT 6.${rnd(1, 3)}; Trident/7.0; ${rnd([
'Touch; ',
'',
])}rv:11.0) like Gecko`;
return `Mozilla/5.0 (Windows NT 6.${faker.datatype.number({
min: 1,
max: 3,
})}; Trident/7.0; ${
faker.datatype.boolean() ? 'Touch; ' : ''
}rv:11.0) like Gecko`;
}

//http://msdn.microsoft.com/en-us/library/ie/ms537503(v=vs.85).aspx
return `Mozilla/5.0 (compatible; MSIE ${ver}.0; Windows NT ${version_string.nt()}; Trident/${version_string.trident()}${
rnd(0, 1) === 1 ? `; .NET CLR ${version_string.net()}` : ''
faker.datatype.boolean() ? `; .NET CLR ${version_string.net()}` : ''
})`;
},

opera(arch: Arch): string {
opera(arch: OS): string {
//http://www.opera.com/docs/history/
const presto_ver = ` Presto/${version_string.presto()} Version/${version_string.presto2()})`,
os_ver =
Expand All @@ -309,23 +327,38 @@ export function generate(faker: Faker): string {
? `(X11; Linux ${randomProc(arch)}; U; ${randomLang()}${presto_ver}`
: `(Macintosh; Intel Mac OS X ${version_string.osx()} U; ${randomLang()} Presto/${version_string.presto()} Version/${version_string.presto2()})`;

return `Opera/${rnd(9, 14)}.${rnd(0, 99)} ${os_ver}`;
return `Opera/${faker.datatype.number({
min: 9,
max: 14,
})}.${faker.datatype.number({
min: 0,
max: 99,
})} ${os_ver}`;
},

safari(arch: Arch): string {
safari(arch: OS): string {
const safari = version_string.safari(),
ver = `${rnd(4, 7)}.${rnd(0, 1)}.${rnd(0, 10)}`,
ver = `${faker.datatype.number({
min: 4,
max: 7,
})}.${faker.datatype.number({
min: 0,
max: 1,
})}.${faker.datatype.number({ min: 0, max: 10 })}`,
os_ver =
arch === 'mac'
? `(Macintosh; ${randomProc('mac')} Mac OS X ${version_string.osx(
'_'
)} rv:${rnd(2, 6)}.0; ${randomLang()}) `
)} rv:${faker.datatype.number({
min: 2,
max: 6,
})}.0; ${randomLang()}) `
: `(Windows; U; Windows NT ${version_string.nt()})`;

return `Mozilla/5.0 ${os_ver}AppleWebKit/${safari} (KHTML, like Gecko) Version/${ver} Safari/${safari}`;
},

chrome(arch: Arch): string {
chrome(arch: OS): string {
const safari = version_string.safari(),
os_ver =
arch === 'mac'
Expand All @@ -340,6 +373,6 @@ export function generate(faker: Faker): string {
},
};

const random = randomBrowserAndOS();
return browser[random[0]](random[1]);
const [browser, arch] = randomBrowserAndOS();
return browserMap[browser](arch);
}

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