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Use correct encoding when fetching non-UTF-8 site metadata (#2015)

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* Use correct encoding when fetching non-UTF-8 site metadata

* Style fixes
This commit is contained in:
Rens Groothuijsen 2022-01-06 14:13:17 +01:00 committed by GitHub
parent e864685759
commit 661f97a073
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 21 additions and 5 deletions
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1
crates/utils/Cargo.toml
View file

@ -45,3 +45,4 @@ webpage = { version = "1.4.0", default-features = false, features = ["serde"] }
jsonwebtoken = "7.2.0"
doku = "0.10.2"
uuid = { version = "0.8.2", features = ["serde", "v4"] }
encoding = "0.2.33"

25
crates/utils/src/request.rs
View file

@ -1,5 +1,6 @@
use crate::{settings::structs::Settings, version::VERSION, LemmyError};
use anyhow::anyhow;
use encoding::{all::encodings, DecoderTrap};
use percent_encoding::{utf8_percent_encode, NON_ALPHANUMERIC};
use reqwest_middleware::ClientWithMiddleware;
use serde::{Deserialize, Serialize};
@ -75,16 +76,17 @@ pub async fn fetch_site_metadata(
.map_err(|e| RecvError(e.to_string()))?
.to_vec();
let html = String::from_utf8_lossy(&html_bytes);
let tags = html_to_site_metadata(&html)?;
let tags = html_to_site_metadata(&html_bytes)?;
Ok(tags)
}
fn html_to_site_metadata(html: &str) -> Result<SiteMetadata, LemmyError> {
fn html_to_site_metadata(html_bytes: &[u8]) -> Result<SiteMetadata, LemmyError> {
let html = String::from_utf8_lossy(html_bytes);
// Make sure the first line is doctype html
let first_line = html
.trim_start()
.lines()
.into_iter()
.next()
@ -97,7 +99,20 @@ fn html_to_site_metadata(html: &str) -> Result<SiteMetadata, LemmyError> {
));
}
let page = HTML::from_string(html.to_string(), None)?;
let mut page = HTML::from_string(html.to_string(), None)?;
// If the web page specifies that it isn't actually UTF-8, re-decode the received bytes with the
// proper encoding. If the specified encoding cannot be found, fall back to the original UTF-8
// version.
if let Some(charset) = page.meta.get("charset") {
if charset.to_lowercase() != "utf-8" {
if let Some(encoding_ref) = encodings().iter().find(|e| e.name() == charset) {
if let Ok(html_with_encoding) = encoding_ref.decode(html_bytes, DecoderTrap::Replace) {
page = HTML::from_string(html_with_encoding, None)?;
}
}
}
}
let page_title = page.title;
let page_description = page.description;