misc-mirrors/article_scraper
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more cleanups & more tests

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This commit is contained in:
Jan Lukas Gernert 2023-02-27 01:00:56 +01:00
parent 0834c4d72a
commit df999cd9fc
9 changed files with 1607 additions and 26 deletions
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58
src/full_text_parser/mod.rs
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@ -40,7 +40,7 @@ impl FullTextParser {
url: &url::Url,
client: &Client,
) -> Result<Article, FullTextParserError> {
libxml::tree::node::set_node_rc_guard(4);
libxml::tree::node::set_node_rc_guard(10);
info!("Scraping article: '{}'", url.as_str());
@ -126,9 +126,7 @@ impl FullTextParser {
return Err(error);
}
if let Some(mut root) = document.get_root_element() {
Self::post_process_content(&mut root)?;
}
Self::post_process_content(&document)?;
article.document = Some(document);
@ -614,6 +612,12 @@ impl FullTextParser {
let _ = Util::strip_node(context, "//*[contains(@style,'display:none')]");
// strip all comments
let _ = Util::strip_node(context, "//input");
let _ = Util::strip_node(context, "//textarea");
let _ = Util::strip_node(context, "//select");
let _ = Util::strip_node(context, "//button");
// strip all input elements
let _ = Util::strip_node(context, "//comment()");
// strip all scripts
@ -627,6 +631,13 @@ impl FullTextParser {
// strip all external css and fonts
let _ = Util::strip_node(context, "//*[@type='text/css']");
// other junk
let _ = Util::strip_node(context, "//object");
let _ = Util::strip_node(context, "//embed");
let _ = Util::strip_node(context, "//footer");
let _ = Util::strip_node(context, "//link");
let _ = Util::strip_node(context, "//aside");
}
/**
@ -837,9 +848,42 @@ impl FullTextParser {
Ok(())
}
pub(crate) fn post_process_content(root: &mut Node) -> Result<(), FullTextParserError> {
Self::clean_classes(root)?;
Self::simplify_nested_elements(root)?;
pub(crate) fn post_process_content(document: &Document) -> Result<(), FullTextParserError> {
if let Some(mut root) = document.get_root_element() {
Self::clean_classes(&mut root)?;
Self::simplify_nested_elements(&mut root)?;
}
let context = Context::new(document).map_err(|()| {
error!("Creating xpath context failed for article HTML");
FullTextParserError::Xml
})?;
// replace H1 with H2 as H1 should be only title that is displayed separately
let h1_nodes = Util::evaluate_xpath(&context, "//h1", false)?;
for mut h1_node in h1_nodes {
h1_node.set_name("h2").map_err(|e| {
log::error!("{e}");
FullTextParserError::Xml
})?;
}
// Remove extra paragraphs & divs
let mut nodes = Util::evaluate_xpath(&context, "//p", false)?;
nodes.append(&mut Util::evaluate_xpath(&context, "//P", false)?);
nodes.append(&mut Util::evaluate_xpath(&context, "//div", false)?);
for mut node in nodes {
let img_count = Util::get_elements_by_tag_name(&node, "img").len();
let embed_count = Util::get_elements_by_tag_name(&node, "embed").len();
let object_count = Util::get_elements_by_tag_name(&node, "object").len();
let iframe_count = Util::get_elements_by_tag_name(&node, "iframe").len();
let total_count = img_count + embed_count + object_count + iframe_count;
if total_count == 0 && Util::get_inner_text(&node, false).trim().is_empty() {
node.unlink();
}
}
Ok(())
}