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1483 lines
70 KiB
Rust
1483 lines
70 KiB
Rust
use base64;
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use chrono::prelude::*;
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use html5ever::interface::QualName;
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use html5ever::parse_document;
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use html5ever::rcdom::{Handle, NodeData, RcDom};
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use html5ever::serialize::{serialize, SerializeOpts};
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use html5ever::tendril::{format_tendril, TendrilSink};
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use html5ever::tree_builder::{Attribute, TreeSink};
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use html5ever::{local_name, namespace_url, ns, LocalName};
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use regex::Regex;
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use reqwest::blocking::Client;
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use reqwest::Url;
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use sha2::{Digest, Sha256, Sha384, Sha512};
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use std::collections::HashMap;
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use std::default::Default;
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use crate::css::embed_css;
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use crate::js::attr_is_event_handler;
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use crate::opts::Options;
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use crate::url::{
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data_to_data_url, get_url_fragment, is_http_url, resolve_url, url_has_protocol,
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url_with_fragment,
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};
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use crate::utils::retrieve_asset;
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struct SrcSetItem<'a> {
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path: &'a str,
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descriptor: &'a str,
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}
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const ICON_VALUES: &'static [&str] = &["icon", "shortcut icon"];
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pub fn add_favicon(document: &Handle, favicon_data_url: String) -> RcDom {
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let mut buf: Vec<u8> = Vec::new();
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serialize(&mut buf, document, SerializeOpts::default())
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.expect("unable to serialize DOM into buffer");
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let result = String::from_utf8(buf).unwrap();
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let mut dom = html_to_dom(&result);
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let doc = dom.get_document();
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if let Some(html) = get_child_node_by_name(&doc, "html") {
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if let Some(head) = get_child_node_by_name(&html, "head") {
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let favicon_node = dom.create_element(
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QualName::new(None, ns!(), local_name!("link")),
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vec![
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Attribute {
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name: QualName::new(None, ns!(), local_name!("rel")),
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value: format_tendril!("icon"),
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},
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Attribute {
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name: QualName::new(None, ns!(), local_name!("href")),
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value: format_tendril!("{}", favicon_data_url),
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},
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],
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Default::default(),
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);
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// Insert favicon LINK tag into HEAD
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head.children.borrow_mut().push(favicon_node.clone());
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}
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}
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dom
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}
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pub fn check_integrity(data: &[u8], integrity: &str) -> bool {
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if integrity.starts_with("sha256-") {
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let mut hasher = Sha256::new();
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hasher.update(data);
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base64::encode(hasher.finalize()) == integrity[7..]
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} else if integrity.starts_with("sha384-") {
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let mut hasher = Sha384::new();
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hasher.update(data);
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base64::encode(hasher.finalize()) == integrity[7..]
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} else if integrity.starts_with("sha512-") {
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let mut hasher = Sha512::new();
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hasher.update(data);
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base64::encode(hasher.finalize()) == integrity[7..]
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} else {
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false
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}
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}
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pub fn compose_csp(options: &Options) -> String {
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let mut string_list = vec![];
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if options.isolate {
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string_list.push("default-src 'unsafe-inline' data:;");
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}
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if options.no_css {
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string_list.push("style-src 'none';");
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}
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if options.no_fonts {
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string_list.push("font-src 'none';");
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}
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if options.no_frames {
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string_list.push("frame-src 'none';");
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string_list.push("child-src 'none';");
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}
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if options.no_js {
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string_list.push("script-src 'none';");
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}
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if options.no_images {
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// Note: "data:" is required for transparent pixel images to work
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string_list.push("img-src data:;");
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}
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string_list.join(" ")
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}
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pub fn create_metadata_tag(url: &str) -> String {
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let timestamp = Utc::now().to_rfc3339_opts(SecondsFormat::Secs, true);
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// Safe to unwrap (we just put this through an HTTP request)
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match Url::parse(url) {
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Ok(mut clean_url) => {
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clean_url.set_fragment(None);
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// Prevent credentials from getting into metadata
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if is_http_url(url) {
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// Only HTTP(S) URLs may feature credentials
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clean_url.set_username("").unwrap();
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clean_url.set_password(None).unwrap();
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}
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format!(
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"<!-- Saved from {} at {} using {} v{} -->",
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if is_http_url(url) {
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&clean_url.as_str()
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} else {
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"local source"
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},
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timestamp,
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env!("CARGO_PKG_NAME"),
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env!("CARGO_PKG_VERSION"),
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)
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}
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Err(_) => str!(),
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}
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}
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pub fn embed_srcset(
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cache: &mut HashMap<String, Vec<u8>>,
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client: &Client,
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parent_url: &str,
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srcset: &str,
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options: &Options,
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depth: u32,
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) -> String {
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let mut array: Vec<SrcSetItem> = vec![];
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let re = Regex::new(r",\s+").unwrap();
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for srcset_item in re.split(srcset) {
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let parts: Vec<&str> = srcset_item.trim().split_whitespace().collect();
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if parts.len() > 0 {
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let path = parts[0].trim();
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let descriptor = if parts.len() > 1 { parts[1].trim() } else { "" };
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let srcset_real_item = SrcSetItem { path, descriptor };
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array.push(srcset_real_item);
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}
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}
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let mut result: String = str!();
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let mut i: usize = array.len();
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for part in array {
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if options.no_images {
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result.push_str(empty_image!());
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} else {
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let image_full_url = resolve_url(&parent_url, part.path).unwrap_or_default();
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let image_url_fragment = get_url_fragment(image_full_url.clone());
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match retrieve_asset(
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cache,
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client,
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&parent_url,
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&image_full_url,
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options,
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depth + 1,
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) {
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Ok((image_data, image_final_url, image_media_type)) => {
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let image_data_url =
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data_to_data_url(&image_media_type, &image_data, &image_final_url);
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// Append retreved asset as a data URL
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let assembled_url: String =
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url_with_fragment(image_data_url.as_str(), image_url_fragment.as_str());
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result.push_str(assembled_url.as_ref());
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}
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Err(_) => {
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// Keep remote reference if unable to retrieve the asset
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if is_http_url(image_full_url.clone()) {
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let assembled_url: String =
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url_with_fragment(image_full_url.as_str(), image_url_fragment.as_str());
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result.push_str(assembled_url.as_ref());
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} else {
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// Avoid breaking the structure in case if not an HTTP(S) URL
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result.push_str(empty_image!());
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}
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}
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}
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}
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if !part.descriptor.is_empty() {
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result.push_str(" ");
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result.push_str(part.descriptor);
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}
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if i > 1 {
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result.push_str(", ");
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}
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i -= 1;
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}
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result
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}
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pub fn find_base_node(node: &Handle) -> Option<Handle> {
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match node.data {
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NodeData::Document => {
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// Dig deeper
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for child in node.children.borrow().iter() {
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if let Some(base_node) = find_base_node(child) {
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return Some(base_node);
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}
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}
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}
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NodeData::Element { ref name, .. } => {
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match name.local.as_ref() {
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"head" => {
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return get_child_node_by_name(node, "base");
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}
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_ => {}
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}
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// Dig deeper
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for child in node.children.borrow().iter() {
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if let Some(base_node) = find_base_node(child) {
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return Some(base_node);
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}
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}
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}
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_ => {}
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}
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None
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}
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pub fn get_base_url(handle: &Handle) -> Option<String> {
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if let Some(base_node) = find_base_node(handle) {
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get_node_attr(&base_node, "href")
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} else {
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None
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}
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}
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pub fn get_child_node_by_name(parent: &Handle, node_name: &str) -> Option<Handle> {
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let children = parent.children.borrow();
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let matching_children = children.iter().find(|child| match child.data {
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NodeData::Element { ref name, .. } => &*name.local == node_name,
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_ => false,
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});
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match matching_children {
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Some(node) => Some(node.clone()),
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_ => None,
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}
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}
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pub fn get_node_name(node: &Handle) -> Option<&'_ str> {
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match &node.data {
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NodeData::Element { ref name, .. } => Some(name.local.as_ref()),
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_ => None,
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}
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}
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pub fn get_node_attr(node: &Handle, attr_name: &str) -> Option<String> {
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match &node.data {
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NodeData::Element { ref attrs, .. } => {
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for attr in attrs.borrow().iter() {
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if &*attr.name.local == attr_name {
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return Some(str!(&*attr.value));
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}
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}
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None
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}
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_ => None,
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}
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}
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pub fn get_parent_node(child: &Handle) -> Handle {
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let parent = child.parent.take().clone();
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parent.and_then(|node| node.upgrade()).unwrap()
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}
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pub fn has_favicon(handle: &Handle) -> bool {
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let mut found_favicon: bool = false;
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match handle.data {
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NodeData::Document => {
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// Dig deeper
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for child in handle.children.borrow().iter() {
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if has_favicon(child) {
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found_favicon = true;
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break;
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}
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}
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}
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NodeData::Element { ref name, .. } => {
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match name.local.as_ref() {
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"link" => {
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if let Some(attr_value) = get_node_attr(handle, "rel") {
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if is_icon(attr_value.trim()) {
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found_favicon = true;
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}
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}
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}
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_ => {}
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}
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if !found_favicon {
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// Dig deeper
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for child in handle.children.borrow().iter() {
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if has_favicon(child) {
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found_favicon = true;
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break;
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}
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}
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}
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}
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_ => {}
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}
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found_favicon
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}
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pub fn html_to_dom(data: &str) -> RcDom {
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parse_document(RcDom::default(), Default::default())
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.from_utf8()
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.read_from(&mut data.as_bytes())
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.unwrap()
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}
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pub fn is_icon(attr_value: &str) -> bool {
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ICON_VALUES.contains(&attr_value.to_lowercase().as_str())
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}
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pub fn set_base_url(document: &Handle, desired_base_href: String) -> RcDom {
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let mut buf: Vec<u8> = Vec::new();
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serialize(&mut buf, document, SerializeOpts::default())
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.expect("unable to serialize DOM into buffer");
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let result = String::from_utf8(buf).unwrap();
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let mut dom = html_to_dom(&result);
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let doc = dom.get_document();
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if let Some(html_node) = get_child_node_by_name(&doc, "html") {
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if let Some(head_node) = get_child_node_by_name(&html_node, "head") {
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// Check if BASE node already exists in the DOM tree
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if let Some(base_node) = get_child_node_by_name(&head_node, "base") {
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set_node_attr(&base_node, "href", Some(desired_base_href));
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} else {
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let base_node = dom.create_element(
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QualName::new(None, ns!(), local_name!("base")),
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vec![Attribute {
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name: QualName::new(None, ns!(), local_name!("href")),
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value: format_tendril!("{}", desired_base_href),
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}],
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Default::default(),
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);
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// Insert newly created BASE node into HEAD
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head_node.children.borrow_mut().push(base_node.clone());
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}
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}
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}
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|
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dom
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}
|
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|
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pub fn set_node_attr(node: &Handle, attr_name: &str, attr_value: Option<String>) {
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match &node.data {
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NodeData::Element { ref attrs, .. } => {
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let attrs_mut = &mut attrs.borrow_mut();
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let mut i = 0;
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let mut found_existing_attr: bool = false;
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while i < attrs_mut.len() {
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if &attrs_mut[i].name.local == attr_name {
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found_existing_attr = true;
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|
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if let Some(attr_value) = attr_value.clone() {
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&attrs_mut[i].value.clear();
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&attrs_mut[i].value.push_slice(&attr_value.as_str());
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} else {
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// Remove attr completely if attr_value is not defined
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attrs_mut.remove(i);
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continue;
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}
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}
|
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|
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i += 1;
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}
|
|
|
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if !found_existing_attr {
|
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// Add new attribute (since originally the target node didn't have it)
|
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if let Some(attr_value) = attr_value.clone() {
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let name = LocalName::from(attr_name);
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attrs_mut.push(Attribute {
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name: QualName::new(None, ns!(), name),
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value: format_tendril!("{}", attr_value),
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});
|
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}
|
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}
|
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}
|
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_ => {}
|
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};
|
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}
|
|
|
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pub fn stringify_document(handle: &Handle, options: &Options) -> String {
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let mut buf: Vec<u8> = Vec::new();
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serialize(&mut buf, handle, SerializeOpts::default())
|
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.expect("Unable to serialize DOM into buffer");
|
|
|
|
let mut result = String::from_utf8(buf).unwrap();
|
|
|
|
// We can't make it isolate the page right away since it may have no HEAD element,
|
|
// ergo we have to serialize, parse the DOM again, insert the CSP meta tag, and then
|
|
// finally serialize and return the resulting string
|
|
if options.isolate
|
|
|| options.no_css
|
|
|| options.no_fonts
|
|
|| options.no_frames
|
|
|| options.no_js
|
|
|| options.no_images
|
|
{
|
|
// Take care of CSP
|
|
let mut buf: Vec<u8> = Vec::new();
|
|
let mut dom = html_to_dom(&result);
|
|
let doc = dom.get_document();
|
|
if let Some(html) = get_child_node_by_name(&doc, "html") {
|
|
if let Some(head) = get_child_node_by_name(&html, "head") {
|
|
let meta = dom.create_element(
|
|
QualName::new(None, ns!(), local_name!("meta")),
|
|
vec![
|
|
Attribute {
|
|
name: QualName::new(None, ns!(), local_name!("http-equiv")),
|
|
value: format_tendril!("Content-Security-Policy"),
|
|
},
|
|
Attribute {
|
|
name: QualName::new(None, ns!(), local_name!("content")),
|
|
value: format_tendril!("{}", compose_csp(options)),
|
|
},
|
|
],
|
|
Default::default(),
|
|
);
|
|
// Note: the CSP meta-tag has to be prepended, never appended,
|
|
// since there already may be one defined in the original document,
|
|
// and browsers don't allow re-defining them (for obvious reasons)
|
|
head.children.borrow_mut().reverse();
|
|
head.children.borrow_mut().push(meta.clone());
|
|
head.children.borrow_mut().reverse();
|
|
}
|
|
}
|
|
|
|
serialize(&mut buf, &doc, SerializeOpts::default())
|
|
.expect("Unable to serialize DOM into buffer");
|
|
result = String::from_utf8(buf).unwrap();
|
|
}
|
|
|
|
result
|
|
}
|
|
|
|
pub fn walk_and_embed_assets(
|
|
cache: &mut HashMap<String, Vec<u8>>,
|
|
client: &Client,
|
|
url: &str,
|
|
node: &Handle,
|
|
options: &Options,
|
|
depth: u32,
|
|
) {
|
|
match node.data {
|
|
NodeData::Document => {
|
|
// Dig deeper
|
|
for child in node.children.borrow().iter() {
|
|
walk_and_embed_assets(cache, client, &url, child, options, depth);
|
|
}
|
|
}
|
|
NodeData::Element {
|
|
ref name,
|
|
ref attrs,
|
|
..
|
|
} => {
|
|
match name.local.as_ref() {
|
|
"meta" => {
|
|
if let Some(meta_attr_http_equiv_value) = get_node_attr(node, "http-equiv") {
|
|
let meta_attr_http_equiv_value: &str = &meta_attr_http_equiv_value;
|
|
if meta_attr_http_equiv_value.eq_ignore_ascii_case("refresh")
|
|
|| meta_attr_http_equiv_value.eq_ignore_ascii_case("location")
|
|
{
|
|
// Remove http-equiv attributes from META nodes if they're able to control the page
|
|
set_node_attr(
|
|
&node,
|
|
"http-equiv",
|
|
Some(format!(
|
|
"disabled by monolith ({})",
|
|
meta_attr_http_equiv_value
|
|
)),
|
|
);
|
|
} else if meta_attr_http_equiv_value.eq_ignore_ascii_case("Content-Type") {
|
|
// Enforce charset to be set to UTF-8
|
|
if let Some(_attr_value) = get_node_attr(node, "content") {
|
|
set_node_attr(
|
|
&node,
|
|
"content",
|
|
Some(str!("text/html; charset=utf-8")),
|
|
);
|
|
}
|
|
}
|
|
} else if let Some(_meta_attr_http_equiv_value) = get_node_attr(node, "charset")
|
|
{
|
|
// Enforce charset to be set to UTF-8
|
|
set_node_attr(&node, "charset", Some(str!("utf-8")));
|
|
}
|
|
}
|
|
"link" => {
|
|
// Read and remember integrity attribute value of this LINK node
|
|
let link_attr_integrity_value: Option<String> =
|
|
get_node_attr(node, "integrity");
|
|
|
|
// Remove integrity attribute from the LINK node
|
|
if link_attr_integrity_value != None {
|
|
set_node_attr(node, "integrity", None);
|
|
}
|
|
|
|
enum LinkType {
|
|
Icon,
|
|
Stylesheet,
|
|
Preload,
|
|
DnsPrefetch,
|
|
Unknown,
|
|
}
|
|
|
|
let mut link_type = LinkType::Unknown;
|
|
if let Some(link_attr_rel_value) = get_node_attr(node, "rel") {
|
|
if is_icon(&link_attr_rel_value) {
|
|
link_type = LinkType::Icon;
|
|
} else if link_attr_rel_value.eq_ignore_ascii_case("stylesheet") {
|
|
link_type = LinkType::Stylesheet;
|
|
} else if link_attr_rel_value.eq_ignore_ascii_case("preload") {
|
|
link_type = LinkType::Preload;
|
|
} else if link_attr_rel_value.eq_ignore_ascii_case("dns-prefetch") {
|
|
link_type = LinkType::DnsPrefetch;
|
|
}
|
|
}
|
|
// Shadow the variable (to make it non-mutable)
|
|
let link_type = link_type;
|
|
|
|
match link_type {
|
|
LinkType::Icon => {
|
|
// Find and resolve this LINK node's href attribute
|
|
if let Some(link_attr_href_value) = get_node_attr(node, "href") {
|
|
if !options.no_images && !link_attr_href_value.is_empty() {
|
|
let link_href_full_url =
|
|
resolve_url(&url, link_attr_href_value).unwrap_or_default();
|
|
let link_href_url_fragment =
|
|
get_url_fragment(link_href_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&link_href_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((
|
|
link_href_data,
|
|
link_href_final_url,
|
|
link_href_media_type,
|
|
)) => {
|
|
let mut ok_to_include = true;
|
|
|
|
// Check integrity
|
|
if let Some(link_attr_integrity_value) =
|
|
link_attr_integrity_value
|
|
{
|
|
if !link_attr_integrity_value.is_empty() {
|
|
ok_to_include = check_integrity(
|
|
&link_href_data,
|
|
&link_attr_integrity_value,
|
|
);
|
|
}
|
|
}
|
|
|
|
if ok_to_include {
|
|
let link_href_data_url = data_to_data_url(
|
|
&link_href_media_type,
|
|
&link_href_data,
|
|
&link_href_final_url,
|
|
);
|
|
// Add new data URL href attribute
|
|
let assembled_url: String = url_with_fragment(
|
|
link_href_data_url.as_str(),
|
|
link_href_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(&node, "href", Some(assembled_url));
|
|
}
|
|
}
|
|
Err(_) => {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
if is_http_url(link_href_full_url.clone()) {
|
|
let assembled_url: String = url_with_fragment(
|
|
link_href_full_url.as_str(),
|
|
link_href_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "href", Some(assembled_url));
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
set_node_attr(node, "href", None);
|
|
}
|
|
}
|
|
}
|
|
LinkType::Stylesheet => {
|
|
// Find and resolve this LINK node's href attribute
|
|
if let Some(link_attr_href_value) = get_node_attr(node, "href") {
|
|
set_node_attr(node, "href", None);
|
|
|
|
if !options.no_css && !link_attr_href_value.is_empty() {
|
|
let link_href_full_url =
|
|
resolve_url(&url, link_attr_href_value).unwrap_or_default();
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&link_href_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((
|
|
link_href_data,
|
|
link_href_final_url,
|
|
_link_href_media_type,
|
|
)) => {
|
|
let mut ok_to_include = true;
|
|
|
|
// Check integrity
|
|
if let Some(link_attr_integrity_value) =
|
|
link_attr_integrity_value
|
|
{
|
|
if !link_attr_integrity_value.is_empty() {
|
|
ok_to_include = check_integrity(
|
|
&link_href_data,
|
|
&link_attr_integrity_value,
|
|
);
|
|
}
|
|
}
|
|
|
|
if ok_to_include {
|
|
let css: String = embed_css(
|
|
cache,
|
|
client,
|
|
&link_href_final_url,
|
|
&String::from_utf8_lossy(&link_href_data),
|
|
options,
|
|
depth + 1,
|
|
);
|
|
let link_href_data_url = data_to_data_url(
|
|
"text/css",
|
|
css.as_bytes(),
|
|
&link_href_final_url,
|
|
);
|
|
// Add new data URL href attribute
|
|
set_node_attr(
|
|
&node,
|
|
"href",
|
|
Some(link_href_data_url),
|
|
);
|
|
}
|
|
}
|
|
Err(_) => {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
if is_http_url(link_href_full_url.clone()) {
|
|
set_node_attr(
|
|
&node,
|
|
"href",
|
|
Some(link_href_full_url),
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
LinkType::Preload | LinkType::DnsPrefetch => {
|
|
// Since all resources are embedded as data URLs, preloading and prefetching are not necessary
|
|
set_node_attr(node, "rel", None);
|
|
}
|
|
LinkType::Unknown => {
|
|
// Make sure that all other LINKs' href attributes are full URLs
|
|
if let Some(link_attr_href_value) = get_node_attr(node, "href") {
|
|
let href_full_url =
|
|
resolve_url(&url, link_attr_href_value).unwrap_or_default();
|
|
set_node_attr(node, "href", Some(href_full_url));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"base" => {
|
|
if is_http_url(url) {
|
|
// Ensure the BASE node doesn't have a relative URL
|
|
if let Some(base_attr_href_value) = get_node_attr(node, "href") {
|
|
let href_full_url =
|
|
resolve_url(&url, base_attr_href_value).unwrap_or_default();
|
|
set_node_attr(node, "href", Some(href_full_url));
|
|
}
|
|
}
|
|
}
|
|
"body" => {
|
|
// Read and remember background attribute value of this BODY node
|
|
if let Some(body_attr_background_value) = get_node_attr(node, "background") {
|
|
// Remove background BODY node attribute by default
|
|
set_node_attr(node, "background", None);
|
|
|
|
if !options.no_images && !body_attr_background_value.is_empty() {
|
|
let background_full_url =
|
|
resolve_url(&url, body_attr_background_value).unwrap_or_default();
|
|
let background_url_fragment =
|
|
get_url_fragment(background_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&background_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((
|
|
background_data,
|
|
background_final_url,
|
|
background_media_type,
|
|
)) => {
|
|
let background_data_url = data_to_data_url(
|
|
&background_media_type,
|
|
&background_data,
|
|
&background_final_url,
|
|
);
|
|
// Convert background attribute to data URL
|
|
let assembled_url: String = url_with_fragment(
|
|
background_data_url.as_str(),
|
|
background_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "background", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
if is_http_url(background_full_url.clone()) {
|
|
let assembled_url: String = url_with_fragment(
|
|
background_full_url.as_str(),
|
|
background_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "background", Some(assembled_url));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"img" => {
|
|
// Find src and data-src attribute(s)
|
|
let img_attr_src_value: Option<String> = get_node_attr(node, "src");
|
|
let img_attr_data_src_value: Option<String> = get_node_attr(node, "data-src");
|
|
|
|
if options.no_images {
|
|
// Put empty images into src and data-src attributes
|
|
if img_attr_src_value != None {
|
|
set_node_attr(node, "src", Some(str!(empty_image!())));
|
|
}
|
|
if img_attr_data_src_value != None {
|
|
set_node_attr(node, "data-src", Some(str!(empty_image!())));
|
|
}
|
|
} else {
|
|
if img_attr_src_value.clone().unwrap_or_default().is_empty()
|
|
&& img_attr_data_src_value
|
|
.clone()
|
|
.unwrap_or_default()
|
|
.is_empty()
|
|
{
|
|
// Add empty src attribute
|
|
set_node_attr(node, "src", Some(str!()));
|
|
} else {
|
|
// Add data URL src attribute
|
|
let img_full_url = resolve_url(
|
|
&url,
|
|
if !img_attr_data_src_value
|
|
.clone()
|
|
.unwrap_or_default()
|
|
.is_empty()
|
|
{
|
|
img_attr_data_src_value.unwrap_or_default()
|
|
} else {
|
|
img_attr_src_value.unwrap_or_default()
|
|
},
|
|
)
|
|
.unwrap_or_default();
|
|
let img_url_fragment = get_url_fragment(img_full_url.clone());
|
|
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&img_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((img_data, img_final_url, img_media_type)) => {
|
|
let img_data_url = data_to_data_url(
|
|
&img_media_type,
|
|
&img_data,
|
|
&img_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
img_data_url.as_str(),
|
|
img_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(img_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
let assembled_url: String = url_with_fragment(
|
|
img_full_url.as_str(),
|
|
img_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
} else {
|
|
// Don't keep original reference if it's not a remote target
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Resolve srcset attribute
|
|
if let Some(img_srcset) = get_node_attr(node, "srcset") {
|
|
if !img_srcset.is_empty() {
|
|
let resolved_srcset: String =
|
|
embed_srcset(cache, client, &url, &img_srcset, options, depth);
|
|
set_node_attr(node, "srcset", Some(resolved_srcset));
|
|
}
|
|
}
|
|
}
|
|
"svg" => {
|
|
if options.no_images {
|
|
node.children.borrow_mut().clear();
|
|
}
|
|
}
|
|
"input" => {
|
|
if let Some(input_attr_type_value) = get_node_attr(node, "type") {
|
|
if input_attr_type_value.eq_ignore_ascii_case("image") {
|
|
if let Some(input_attr_src_value) = get_node_attr(node, "src") {
|
|
if options.no_images || input_attr_src_value.is_empty() {
|
|
let value = if input_attr_src_value.is_empty() {
|
|
str!()
|
|
} else {
|
|
str!(empty_image!())
|
|
};
|
|
set_node_attr(node, "src", Some(value));
|
|
} else {
|
|
let input_image_full_url =
|
|
resolve_url(&url, input_attr_src_value).unwrap_or_default();
|
|
let input_image_url_fragment =
|
|
get_url_fragment(input_image_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&input_image_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((
|
|
input_image_data,
|
|
input_image_final_url,
|
|
input_image_media_type,
|
|
)) => {
|
|
let input_image_data_url = data_to_data_url(
|
|
&input_image_media_type,
|
|
&input_image_data,
|
|
&input_image_final_url,
|
|
);
|
|
// Add data URL src attribute
|
|
let assembled_url: String = url_with_fragment(
|
|
input_image_data_url.as_str(),
|
|
input_image_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
if is_http_url(input_image_full_url.clone()) {
|
|
let assembled_url: String = url_with_fragment(
|
|
input_image_full_url.as_str(),
|
|
input_image_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"image" => {
|
|
let mut image_href: String = str!();
|
|
|
|
if let Some(image_attr_href_value) = get_node_attr(node, "href") {
|
|
image_href = image_attr_href_value;
|
|
if options.no_images {
|
|
set_node_attr(node, "href", None);
|
|
}
|
|
}
|
|
if let Some(image_attr_xlink_href_value) = get_node_attr(node, "xlink:href") {
|
|
image_href = image_attr_xlink_href_value;
|
|
if options.no_images {
|
|
set_node_attr(node, "xlink:href", None);
|
|
}
|
|
}
|
|
|
|
if !options.no_images && !image_href.is_empty() {
|
|
let image_full_url = resolve_url(&url, image_href).unwrap_or_default();
|
|
let image_url_fragment = get_url_fragment(image_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&image_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((image_data, image_final_url, image_media_type)) => {
|
|
let image_data_url = data_to_data_url(
|
|
&image_media_type,
|
|
&image_data,
|
|
&image_final_url,
|
|
);
|
|
// Add new data URL href attribute
|
|
let assembled_url: String = url_with_fragment(
|
|
image_data_url.as_str(),
|
|
image_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "href", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
if is_http_url(image_full_url.clone()) {
|
|
let assembled_url: String = url_with_fragment(
|
|
image_full_url.as_str(),
|
|
image_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "href", Some(assembled_url));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"source" => {
|
|
let parent_node = get_parent_node(node);
|
|
let parent_node_name: &str = get_node_name(&parent_node).unwrap_or_default();
|
|
|
|
if let Some(source_attr_src_value) = get_node_attr(node, "src") {
|
|
if parent_node_name == "audio" {
|
|
if options.no_audio {
|
|
set_node_attr(node, "src", None);
|
|
} else {
|
|
let src_full_url: String =
|
|
resolve_url(&url, source_attr_src_value.clone())
|
|
.unwrap_or_else(|_| source_attr_src_value.to_string());
|
|
let src_url_fragment = get_url_fragment(src_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&src_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((src_data, src_final_url, src_media_type)) => {
|
|
let src_data_url = data_to_data_url(
|
|
&src_media_type,
|
|
&src_data,
|
|
&src_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
src_data_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(src_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
let assembled_url: String = url_with_fragment(
|
|
src_full_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
} else {
|
|
// Exclude non-remote URLs
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else if parent_node_name == "video" {
|
|
if options.no_video {
|
|
set_node_attr(node, "src", None);
|
|
} else {
|
|
let src_full_url: String =
|
|
resolve_url(&url, source_attr_src_value.clone())
|
|
.unwrap_or_else(|_| source_attr_src_value.to_string());
|
|
let src_url_fragment = get_url_fragment(src_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&src_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((src_data, src_final_url, src_media_type)) => {
|
|
let src_data_url = data_to_data_url(
|
|
&src_media_type,
|
|
&src_data,
|
|
&src_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
src_data_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(src_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
let assembled_url: String = url_with_fragment(
|
|
src_full_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
} else {
|
|
// Exclude non-remote URLs
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if let Some(source_attr_srcset_value) = get_node_attr(node, "srcset") {
|
|
if parent_node_name == "picture" {
|
|
if options.no_images {
|
|
set_node_attr(node, "srcset", Some(str!(empty_image!())));
|
|
} else {
|
|
let srcset_full_url =
|
|
resolve_url(&url, source_attr_srcset_value).unwrap_or_default();
|
|
let srcset_url_fragment = get_url_fragment(srcset_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&srcset_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((srcset_data, srcset_final_url, srcset_media_type)) => {
|
|
let srcset_data_url = data_to_data_url(
|
|
&srcset_media_type,
|
|
&srcset_data,
|
|
&srcset_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
srcset_data_url.as_str(),
|
|
srcset_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "srcset", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(srcset_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
let assembled_url: String = url_with_fragment(
|
|
srcset_full_url.as_str(),
|
|
srcset_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "srcset", Some(assembled_url));
|
|
} else {
|
|
// Exclude non-remote URLs
|
|
set_node_attr(node, "srcset", None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"a" | "area" => {
|
|
if let Some(anchor_attr_href_value) = get_node_attr(node, "href") {
|
|
if options.no_js
|
|
&& anchor_attr_href_value
|
|
.clone()
|
|
.trim()
|
|
.starts_with("javascript:")
|
|
{
|
|
// Replace with empty JS call to preserve original behavior
|
|
set_node_attr(node, "href", Some(str!("javascript:;")));
|
|
} else if anchor_attr_href_value.clone().starts_with('#')
|
|
|| url_has_protocol(anchor_attr_href_value.clone())
|
|
{
|
|
// Don't touch email links or hrefs which begin with a hash
|
|
} else {
|
|
let href_full_url =
|
|
resolve_url(&url, anchor_attr_href_value).unwrap_or_default();
|
|
set_node_attr(node, "href", Some(href_full_url));
|
|
}
|
|
}
|
|
}
|
|
"script" => {
|
|
// Read values of integrity and src attributes
|
|
let script_attr_integrity: Option<String> = get_node_attr(node, "integrity");
|
|
let script_attr_src: Option<String> = get_node_attr(node, "src");
|
|
|
|
// Wipe integrity attribute
|
|
if script_attr_integrity != None {
|
|
set_node_attr(node, "integrity", None);
|
|
}
|
|
|
|
if options.no_js {
|
|
// Empty inner content
|
|
node.children.borrow_mut().clear();
|
|
// Remove src attribute
|
|
if script_attr_src != None {
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
} else if !script_attr_src.clone().unwrap_or_default().is_empty() {
|
|
let script_full_url =
|
|
resolve_url(&url, script_attr_src.unwrap_or_default())
|
|
.unwrap_or_default();
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&script_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((script_data, script_final_url, _script_media_type)) => {
|
|
let mut ok_to_include = true;
|
|
|
|
// Check integrity
|
|
if let Some(script_attr_integrity_value) = script_attr_integrity {
|
|
if !script_attr_integrity_value.is_empty() {
|
|
ok_to_include = check_integrity(
|
|
&script_data,
|
|
&script_attr_integrity_value,
|
|
);
|
|
}
|
|
}
|
|
|
|
if ok_to_include {
|
|
// Only embed if we're able to validate integrity
|
|
let script_data_url = data_to_data_url(
|
|
"application/javascript",
|
|
&script_data,
|
|
&script_final_url,
|
|
);
|
|
set_node_attr(node, "src", Some(script_data_url));
|
|
} else {
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(script_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
set_node_attr(node, "src", Some(script_full_url));
|
|
} else {
|
|
// Remove src attribute if target is not remote
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
}
|
|
};
|
|
}
|
|
}
|
|
"style" => {
|
|
if options.no_css {
|
|
// Empty inner content of STYLE tags
|
|
node.children.borrow_mut().clear();
|
|
} else {
|
|
for node in node.children.borrow_mut().iter_mut() {
|
|
if let NodeData::Text { ref contents } = node.data {
|
|
let mut tendril = contents.borrow_mut();
|
|
let replacement = embed_css(
|
|
cache,
|
|
client,
|
|
&url,
|
|
tendril.as_ref(),
|
|
options,
|
|
depth,
|
|
);
|
|
tendril.clear();
|
|
tendril.push_slice(&replacement);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"form" => {
|
|
if let Some(form_attr_action_value) = get_node_attr(node, "action") {
|
|
// Modify action property to ensure it's a full URL
|
|
if !is_http_url(form_attr_action_value.clone()) {
|
|
let form_action_full_url =
|
|
resolve_url(&url, form_attr_action_value).unwrap_or_default();
|
|
set_node_attr(node, "action", Some(form_action_full_url));
|
|
}
|
|
}
|
|
}
|
|
"frame" | "iframe" => {
|
|
if let Some(frame_attr_src_value) = get_node_attr(node, "src") {
|
|
if options.no_frames {
|
|
// Empty the src attribute
|
|
set_node_attr(node, "src", Some(str!()));
|
|
} else {
|
|
let frame_src = frame_attr_src_value.trim();
|
|
|
|
// Ignore (i)frames with empty source (they cause infinite loops)
|
|
if !frame_src.is_empty() {
|
|
let frame_full_url =
|
|
resolve_url(&url, frame_src).unwrap_or_default();
|
|
let frame_url_fragment = get_url_fragment(frame_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&frame_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((frame_data, frame_final_url, frame_media_type)) => {
|
|
let frame_dom =
|
|
html_to_dom(&String::from_utf8_lossy(&frame_data));
|
|
walk_and_embed_assets(
|
|
cache,
|
|
client,
|
|
&frame_final_url,
|
|
&frame_dom.document,
|
|
&options,
|
|
depth + 1,
|
|
);
|
|
let mut frame_data: Vec<u8> = Vec::new();
|
|
serialize(
|
|
&mut frame_data,
|
|
&frame_dom.document,
|
|
SerializeOpts::default(),
|
|
)
|
|
.unwrap();
|
|
let frame_data_url = data_to_data_url(
|
|
&frame_media_type,
|
|
&frame_data,
|
|
&frame_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
frame_data_url.as_str(),
|
|
frame_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
if is_http_url(frame_full_url.clone()) {
|
|
let assembled_url: String = url_with_fragment(
|
|
frame_full_url.as_str(),
|
|
frame_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"audio" => {
|
|
if let Some(audio_attr_src_value) = get_node_attr(node, "src") {
|
|
if options.no_audio {
|
|
set_node_attr(node, "src", None);
|
|
} else {
|
|
let src_full_url: String =
|
|
resolve_url(&url, audio_attr_src_value.clone())
|
|
.unwrap_or_else(|_| audio_attr_src_value.to_string());
|
|
let src_url_fragment = get_url_fragment(src_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&src_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((src_data, src_final_url, src_media_type)) => {
|
|
let src_data_url = data_to_data_url(
|
|
&src_media_type,
|
|
&src_data,
|
|
&src_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
src_data_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(src_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
let assembled_url: String = url_with_fragment(
|
|
src_full_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
} else {
|
|
// Exclude non-remote URLs
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
"video" => {
|
|
if let Some(video_attr_src_value) = get_node_attr(node, "src") {
|
|
if options.no_video {
|
|
set_node_attr(node, "src", None);
|
|
} else {
|
|
let src_full_url: String =
|
|
resolve_url(&url, video_attr_src_value.clone())
|
|
.unwrap_or_else(|_| video_attr_src_value.to_string());
|
|
let src_url_fragment = get_url_fragment(src_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&src_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((src_data, src_final_url, src_media_type)) => {
|
|
let src_data_url = data_to_data_url(
|
|
&src_media_type,
|
|
&src_data,
|
|
&src_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
src_data_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(src_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
let assembled_url: String = url_with_fragment(
|
|
src_full_url.as_str(),
|
|
src_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "src", Some(assembled_url));
|
|
} else {
|
|
// Exclude non-remote URLs
|
|
set_node_attr(node, "src", None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Embed poster images
|
|
if let Some(video_attr_poster_value) = get_node_attr(node, "poster") {
|
|
// Skip posters with empty source
|
|
if !video_attr_poster_value.is_empty() {
|
|
if options.no_images {
|
|
set_node_attr(node, "poster", Some(str!(empty_image!())));
|
|
} else {
|
|
let video_poster_full_url =
|
|
resolve_url(&url, video_attr_poster_value).unwrap_or_default();
|
|
let video_poster_url_fragment =
|
|
get_url_fragment(video_poster_full_url.clone());
|
|
match retrieve_asset(
|
|
cache,
|
|
client,
|
|
&url,
|
|
&video_poster_full_url,
|
|
options,
|
|
depth + 1,
|
|
) {
|
|
Ok((
|
|
video_poster_data,
|
|
video_poster_final_url,
|
|
video_poster_media_type,
|
|
)) => {
|
|
let video_poster_data_url = data_to_data_url(
|
|
&video_poster_media_type,
|
|
&video_poster_data,
|
|
&video_poster_final_url,
|
|
);
|
|
let assembled_url: String = url_with_fragment(
|
|
video_poster_data_url.as_str(),
|
|
video_poster_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "poster", Some(assembled_url));
|
|
}
|
|
Err(_) => {
|
|
if is_http_url(video_poster_full_url.clone()) {
|
|
// Keep remote reference if unable to retrieve the asset
|
|
let assembled_url: String = url_with_fragment(
|
|
video_poster_full_url.as_str(),
|
|
video_poster_url_fragment.as_str(),
|
|
);
|
|
set_node_attr(node, "poster", Some(assembled_url));
|
|
} else {
|
|
// Get rid of poster attribute if the URL is not remote
|
|
set_node_attr(node, "poster", None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
_ => {}
|
|
}
|
|
|
|
// Process style attributes
|
|
if options.no_css {
|
|
// Get rid of style attributes
|
|
set_node_attr(node, "style", None);
|
|
} else {
|
|
// Embed URLs found within the style attribute of this node
|
|
if let Some(node_attr_style_value) = get_node_attr(node, "style") {
|
|
let embedded_style =
|
|
embed_css(cache, client, &url, &node_attr_style_value, options, depth);
|
|
set_node_attr(node, "style", Some(embedded_style));
|
|
}
|
|
}
|
|
|
|
if options.no_js {
|
|
let attrs_mut = &mut attrs.borrow_mut();
|
|
// Get rid of JS event attributes
|
|
let mut js_attr_indexes = Vec::new();
|
|
for (i, attr) in attrs_mut.iter().enumerate() {
|
|
if attr_is_event_handler(&attr.name.local) {
|
|
js_attr_indexes.push(i);
|
|
}
|
|
}
|
|
js_attr_indexes.reverse();
|
|
for attr_index in js_attr_indexes {
|
|
attrs_mut.remove(attr_index);
|
|
}
|
|
}
|
|
|
|
// Dig deeper
|
|
for child in node.children.borrow().iter() {
|
|
walk_and_embed_assets(cache, client, &url, child, options, depth);
|
|
}
|
|
}
|
|
_ => {
|
|
// Note: in case of options.no_js being set to true, there's no need to worry about
|
|
// getting rid of comments that may contain scripts, e.g. <!--[if IE]><script>...
|
|
// since that's not part of W3C standard and therefore gets ignored
|
|
// by browsers other than IE [5, 9]
|
|
}
|
|
}
|
|
}
|