bitwarden_rs/src/util.rs

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//
// Web Headers and caching
//
use rocket::fairing::{Fairing, Info, Kind};
use rocket::{Request, Response};
use rocket::response::{self, Responder};
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pub struct AppHeaders();
impl Fairing for AppHeaders {
fn info(&self) -> Info {
Info {
name: "Application Headers",
kind: Kind::Response,
}
}
fn on_response(&self, _req: &Request, res: &mut Response) {
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res.set_raw_header("Feature-Policy", "accelerometer 'none'; ambient-light-sensor 'none'; autoplay 'none'; camera 'none'; encrypted-media 'none'; fullscreen 'none'; geolocation 'none'; gyroscope 'none'; magnetometer 'none'; microphone 'none'; midi 'none'; payment 'none'; picture-in-picture 'none'; sync-xhr 'self' https://haveibeenpwned.com https://twofactorauth.org; usb 'none'; vr 'none'");
res.set_raw_header("Referrer-Policy", "same-origin");
res.set_raw_header("X-Frame-Options", "SAMEORIGIN");
res.set_raw_header("X-Content-Type-Options", "nosniff");
res.set_raw_header("X-XSS-Protection", "1; mode=block");
let csp = "frame-ancestors 'self' chrome-extension://nngceckbapebfimnlniiiahkandclblb moz-extension://*;";
res.set_raw_header("Content-Security-Policy", csp);
// Disable cache unless otherwise specified
if !res.headers().contains("cache-control") {
res.set_raw_header("Cache-Control", "no-cache, no-store, max-age=0");
}
}
}
pub struct Cached<R>(R, &'static str);
impl<R> Cached<R> {
pub fn long(r: R) -> Cached<R> {
// 7 days
Cached(r, "public, max-age=604800")
}
pub fn short(r: R) -> Cached<R> {
// 10 minutes
Cached(r, "public, max-age=600")
}
}
impl<'r, R: Responder<'r>> Responder<'r> for Cached<R> {
fn respond_to(self, req: &Request) -> response::Result<'r> {
match self.0.respond_to(req) {
Ok(mut res) => {
res.set_raw_header("Cache-Control", self.1);
Ok(res)
}
e @ Err(_) => e,
}
}
}
//
// File handling
//
use std::fs::{self, File};
use std::io::{Read, Result as IOResult};
use std::path::Path;
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pub fn file_exists(path: &str) -> bool {
Path::new(path).exists()
}
pub fn read_file(path: &str) -> IOResult<Vec<u8>> {
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let mut contents: Vec<u8> = Vec::new();
let mut file = File::open(Path::new(path))?;
file.read_to_end(&mut contents)?;
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Ok(contents)
}
pub fn delete_file(path: &str) -> IOResult<()> {
let res = fs::remove_file(path);
if let Some(parent) = Path::new(path).parent() {
// If the directory isn't empty, this returns an error, which we ignore
// We only want to delete the folder if it's empty
fs::remove_dir(parent).ok();
}
res
}
const UNITS: [&str; 6] = ["bytes", "KB", "MB", "GB", "TB", "PB"];
pub fn get_display_size(size: i32) -> String {
let mut size = size as f64;
let mut unit_counter = 0;
loop {
if size > 1024. {
size /= 1024.;
unit_counter += 1;
} else {
break;
}
}
// Round to two decimals
size = (size * 100.).round() / 100.;
format!("{} {}", size, UNITS[unit_counter])
}
pub fn get_uuid() -> String {
uuid::Uuid::new_v4().to_string()
}
//
// String util methods
//
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use std::ops::Try;
use std::str::FromStr;
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pub fn upcase_first(s: &str) -> String {
let mut c = s.chars();
match c.next() {
None => String::new(),
Some(f) => f.to_uppercase().collect::<String>() + c.as_str(),
}
}
pub fn try_parse_string<S, T, U>(string: impl Try<Ok = S, Error = U>) -> Option<T>
where
S: AsRef<str>,
T: FromStr,
{
if let Ok(Ok(value)) = string.into_result().map(|s| s.as_ref().parse::<T>()) {
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Some(value)
} else {
None
}
}
pub fn try_parse_string_or<S, T, U>(string: impl Try<Ok = S, Error = U>, default: T) -> T
where
S: AsRef<str>,
T: FromStr,
{
if let Ok(Ok(value)) = string.into_result().map(|s| s.as_ref().parse::<T>()) {
value
} else {
default
}
}
//
// Env methods
//
use std::env;
pub fn get_env<V>(key: &str) -> Option<V>
where
V: FromStr,
{
try_parse_string(env::var(key))
}
pub fn get_env_or<V>(key: &str, default: V) -> V
where
V: FromStr,
{
try_parse_string_or(env::var(key), default)
}
//
// Date util methods
//
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use chrono::NaiveDateTime;
const DATETIME_FORMAT: &str = "%Y-%m-%dT%H:%M:%S%.6fZ";
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pub fn format_date(date: &NaiveDateTime) -> String {
date.format(DATETIME_FORMAT).to_string()
}
//
// Deserialization methods
//
use std::fmt;
use serde::de::{self, DeserializeOwned, Deserializer, MapAccess, SeqAccess, Visitor};
use serde_json::{self, Value};
pub type JsonMap = serde_json::Map<String, Value>;
#[derive(PartialEq, Serialize, Deserialize)]
pub struct UpCase<T: DeserializeOwned> {
#[serde(deserialize_with = "upcase_deserialize")]
#[serde(flatten)]
pub data: T,
}
// https://github.com/serde-rs/serde/issues/586
pub fn upcase_deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
where
T: DeserializeOwned,
D: Deserializer<'de>,
{
let d = deserializer.deserialize_any(UpCaseVisitor)?;
T::deserialize(d).map_err(de::Error::custom)
}
struct UpCaseVisitor;
impl<'de> Visitor<'de> for UpCaseVisitor {
type Value = Value;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("an object or an array")
}
fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
where
A: MapAccess<'de>,
{
let mut result_map = JsonMap::new();
while let Some((key, value)) = map.next_entry()? {
result_map.insert(upcase_first(key), upcase_value(&value));
}
Ok(Value::Object(result_map))
}
fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
where
A: SeqAccess<'de>,
{
let mut result_seq = Vec::<Value>::new();
while let Some(value) = seq.next_element()? {
result_seq.push(upcase_value(&value));
}
Ok(Value::Array(result_seq))
}
}
fn upcase_value(value: &Value) -> Value {
if let Some(map) = value.as_object() {
let mut new_value = json!({});
for (key, val) in map {
let processed_key = _process_key(key);
new_value[processed_key] = upcase_value(val);
}
new_value
} else if let Some(array) = value.as_array() {
// Initialize array with null values
let mut new_value = json!(vec![Value::Null; array.len()]);
for (index, val) in array.iter().enumerate() {
new_value[index] = upcase_value(val);
}
new_value
} else {
value.clone()
}
}
fn _process_key(key: &str) -> String {
match key.to_lowercase().as_ref() {
"ssn" => "SSN".into(),
_ => self::upcase_first(key),
}
}
//
// Retry methods
//
pub fn retry<F, T, E>(func: F, max_tries: i32) -> Result<T, E>
where
F: Fn() -> Result<T, E>,
{
use std::{thread::sleep, time::Duration};
let mut tries = 0;
loop {
match func() {
ok @ Ok(_) => return ok,
err @ Err(_) => {
tries += 1;
if tries >= max_tries {
return err;
}
sleep(Duration::from_millis(500));
}
}
}
}