Plume/plume-models/src/safe_string.rs

151 lines
3.8 KiB
Rust
Raw Normal View History

use ammonia::{Builder, UrlRelative};
use serde::{self, Serialize, Deserialize,
Serializer, Deserializer, de::Visitor};
use std::{fmt::{self, Display},
borrow::{Borrow, Cow}, io::Write,
iter, ops::Deref};
use diesel::{self, deserialize::Queryable,
types::ToSql,
sql_types::Text,
serialize::{self, Output}};
lazy_static! {
static ref CLEAN: Builder<'static> = {
let mut b = Builder::new();
b.add_generic_attributes(iter::once("id"))
.add_tags(iter::once("iframe"))
.id_prefix(Some("postcontent-"))
.url_relative(UrlRelative::Custom(Box::new(url_add_prefix)))
.add_tag_attributes("iframe",
["width", "height", "src", "frameborder"]
.iter()
.map(|&v| v));
b
};
}
fn url_add_prefix(url: &str) -> Option<Cow<str>> {
if url.starts_with('#') && ! url.starts_with("#postcontent-") {//if start with an #
let mut new_url = "#postcontent-".to_owned();//change to valid id
new_url.push_str(&url[1..]);
Some(Cow::Owned(new_url))
} else {
Some(Cow::Borrowed(url))
}
}
#[derive(Debug, Clone, AsExpression, FromSqlRow, Default)]
#[sql_type = "Text"]
pub struct SafeString{
value: String,
}
impl SafeString{
pub fn new(value: &str) -> Self {
SafeString{
value: CLEAN.clean(&value).to_string(),
}
}
pub fn set(&mut self, value: &str) {
self.value = CLEAN.clean(value).to_string();
}
pub fn get(&self) -> &String {
&self.value
}
}
impl Serialize for SafeString {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer, {
serializer.serialize_str(&self.value)
}
}
struct SafeStringVisitor;
impl<'de> Visitor<'de> for SafeStringVisitor {
type Value = SafeString;
fn expecting(&self, formatter:&mut fmt::Formatter) -> fmt::Result {
formatter.write_str("a string")
}
fn visit_str<E>(self, value: &str) -> Result<SafeString, E>
where E: serde::de::Error{
Ok(SafeString::new(value))
}
}
impl<'de> Deserialize<'de> for SafeString {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: Deserializer<'de>, {
Ok(
deserializer.deserialize_string(SafeStringVisitor)?
)
}
}
#[cfg(all(feature = "postgres", not(feature = "sqlite")))]
impl Queryable<Text, diesel::pg::Pg> for SafeString {
type Row = String;
fn build(value: Self::Row) -> Self {
SafeString::new(&value)
}
}
2018-09-27 23:06:40 +02:00
#[cfg(all(feature = "sqlite", not(feature = "postgres")))]
2018-09-27 23:06:40 +02:00
impl Queryable<Text, diesel::sqlite::Sqlite> for SafeString {
type Row = String;
fn build(value: Self::Row) -> Self {
SafeString::new(&value)
}
}
impl<DB> ToSql<diesel::sql_types::Text, DB> for SafeString
where
DB: diesel::backend::Backend,
str: ToSql<diesel::sql_types::Text, DB>, {
fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> serialize::Result {
str::to_sql(&self.value, out)
}
}
impl Borrow<str> for SafeString {
fn borrow(&self) -> &str {
&self.value
}
}
impl Display for SafeString {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.value)
}
}
impl Deref for SafeString {
type Target = str;
fn deref(&self) -> &str {
&self.value
}
}
impl AsRef<str> for SafeString {
fn as_ref(&self) -> &str {
&self.value
}
}
use rocket::request::FromFormValue;
use rocket::http::RawStr;
impl<'v> FromFormValue<'v> for SafeString {
type Error = &'v RawStr;
fn from_form_value(form_value: &'v RawStr) -> Result<SafeString, &'v RawStr> {
let val = String::from_form_value(form_value)?;
Ok(SafeString::new(&val))
}
}