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Merge pull request #1266 from BlackDex/icon-user-agent

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Small update on favicon downloading
This commit is contained in:
Daniel García 2020-12-14 18:34:07 +01:00 committed by GitHub
commit 4b6bc6ef66
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1 changed files with 47 additions and 43 deletions
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90
src/api/icons.rs
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@ -9,7 +9,7 @@ use std::{
use once_cell::sync::Lazy;
use regex::Regex;
use reqwest::{blocking::Client, blocking::Response, header::HeaderMap, Url};
use reqwest::{blocking::Client, blocking::Response, header, Url};
use rocket::{http::ContentType, http::Cookie, response::Content, Route};
use soup::prelude::*;
@ -22,10 +22,18 @@ pub fn routes() -> Vec<Route> {
const ALLOWED_CHARS: &str = "_-.";
static CLIENT: Lazy<Client> = Lazy::new(|| {
// Generate the default headers
let mut default_headers = header::HeaderMap::new();
default_headers.insert(header::USER_AGENT, header::HeaderValue::from_static("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Safari/605.1.15"));
default_headers.insert(header::ACCEPT_LANGUAGE, header::HeaderValue::from_static("en-US,en;q=0.8"));
default_headers.insert(header::CACHE_CONTROL, header::HeaderValue::from_static("no-cache"));
default_headers.insert(header::PRAGMA, header::HeaderValue::from_static("no-cache"));
default_headers.insert(header::ACCEPT, header::HeaderValue::from_static("text/html,application/xhtml+xml,application/xml; q=0.9,image/webp,image/apng,*/*;q=0.8"));
// Reuse the client between requests
Client::builder()
.timeout(Duration::from_secs(CONFIG.icon_download_timeout()))
.default_headers(_header_map())
.default_headers(default_headers)
.build()
.unwrap()
});
@ -324,6 +332,12 @@ impl Icon {
}
}
struct IconUrlResult {
iconlist: Vec<Icon>,
cookies: String,
referer: String,
}
/// Returns a Result/Tuple which holds a Vector IconList and a string which holds the cookies from the last response.
/// There will always be a result with a string which will contain https://example.com/favicon.ico and an empty string for the cookies.
/// This does not mean that that location does exists, but it is the default location browser use.
@ -336,19 +350,11 @@ impl Icon {
/// let (mut iconlist, cookie_str) = get_icon_url("github.com")?;
/// let (mut iconlist, cookie_str) = get_icon_url("gitlab.com")?;
/// ```
fn get_icon_url(domain: &str) -> Result<(Vec<Icon>, String), Error> {
fn get_icon_url(domain: &str) -> Result<IconUrlResult, Error> {
// Default URL with secure and insecure schemes
let ssldomain = format!("https://{}", domain);
let httpdomain = format!("http://{}", domain);
// Create the iconlist
let mut iconlist: Vec<Icon> = Vec::new();
// Create the cookie_str to fill it all the cookies from the response
// These cookies can be used to request/download the favicon image.
// Some sites have extra security in place with for example XSRF Tokens.
let mut cookie_str = String::new();
// First check the domain as given during the request for both HTTPS and HTTP.
let resp = match get_page(&ssldomain).or_else(|_| get_page(&httpdomain)) {
Ok(c) => Ok(c),
@ -388,6 +394,15 @@ fn get_icon_url(domain: &str) -> Result<(Vec<Icon>, String), Error> {
}
};
// Create the iconlist
let mut iconlist: Vec<Icon> = Vec::new();
// Create the cookie_str to fill it all the cookies from the response
// These cookies can be used to request/download the favicon image.
// Some sites have extra security in place with for example XSRF Tokens.
let mut cookie_str = "".to_string();
let mut referer = "".to_string();
if let Ok(content) = resp {
// Extract the URL from the respose in case redirects occured (like @ gitlab.com)
let url = content.url().clone();
@ -407,6 +422,10 @@ fn get_icon_url(domain: &str) -> Result<(Vec<Icon>, String), Error> {
})
.collect::<String>();
// Set the referer to be used on the final request, some sites check this.
// Mostly used to prevent direct linking and other security resons.
referer = url.as_str().to_string();
// Add the default favicon.ico to the list with the domain the content responded from.
iconlist.push(Icon::new(35, url.join("/favicon.ico").unwrap().into_string()));
@ -446,21 +465,28 @@ fn get_icon_url(domain: &str) -> Result<(Vec<Icon>, String), Error> {
iconlist.sort_by_key(|x| x.priority);
// There always is an icon in the list, so no need to check if it exists, and just return the first one
Ok((iconlist, cookie_str))
Ok(IconUrlResult{
iconlist,
cookies: cookie_str,
referer
})
}
fn get_page(url: &str) -> Result<Response, Error> {
get_page_with_cookies(url, "")
get_page_with_cookies(url, "", "")
}
fn get_page_with_cookies(url: &str, cookie_str: &str) -> Result<Response, Error> {
fn get_page_with_cookies(url: &str, cookie_str: &str, referer: &str) -> Result<Response, Error> {
if is_domain_blacklisted(Url::parse(url).unwrap().host_str().unwrap_or_default()) {
err!("Favicon rel linked to a blacklisted domain!");
}
let mut client = CLIENT.get(url);
if !cookie_str.is_empty() {
client = client.header("cookie", cookie_str)
client = client.header("Cookie", cookie_str)
}
if !referer.is_empty() {
client = client.header("Referer", referer)
}
client.send()?
@ -493,7 +519,7 @@ fn get_icon_priority(href: &str, sizes: Option<String>) -> u8 {
1
} else if width == 64 {
2
} else if width >= 24 && width <= 128 {
} else if (24..=128).contains(&width) {
3
} else if width == 16 {
4
@ -552,13 +578,13 @@ fn download_icon(domain: &str) -> Result<Vec<u8>, Error> {
err!("Domain is blacklisted", domain)
}
let (iconlist, cookie_str) = get_icon_url(&domain)?;
let icon_result = get_icon_url(&domain)?;
let mut buffer = Vec::new();
use data_url::DataUrl;
for icon in iconlist.iter().take(5) {
for icon in icon_result.iconlist.iter().take(5) {
if icon.href.starts_with("data:image") {
let datauri = DataUrl::process(&icon.href).unwrap();
// Check if we are able to decode the data uri
@ -573,13 +599,13 @@ fn download_icon(domain: &str) -> Result<Vec<u8>, Error> {
_ => warn!("data uri is invalid"),
};
} else {
match get_page_with_cookies(&icon.href, &cookie_str) {
match get_page_with_cookies(&icon.href, &icon_result.cookies, &icon_result.referer) {
Ok(mut res) => {
info!("Downloaded icon from {}", icon.href);
res.copy_to(&mut buffer)?;
break;
}
Err(_) => warn!("Download failed for {}", icon.href),
},
_ => warn!("Download failed for {}", icon.href),
};
}
}
@ -604,25 +630,3 @@ fn save_icon(path: &str, icon: &[u8]) {
}
}
}
fn _header_map() -> HeaderMap {
// Set some default headers for the request.
// Use a browser like user-agent to make sure most websites will return there correct website.
use reqwest::header::*;
macro_rules! headers {
($( $name:ident : $value:literal),+ $(,)? ) => {
let mut headers = HeaderMap::new();
$( headers.insert($name, HeaderValue::from_static($value)); )+
headers
};
}
headers! {
USER_AGENT: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299",
ACCEPT_LANGUAGE: "en-US,en;q=0.8",
CACHE_CONTROL: "no-cache",
PRAGMA: "no-cache",
ACCEPT: "text/html,application/xhtml+xml,application/xml; q=0.9,image/webp,image/apng,*/*;q=0.8",
}
}