misc-mirrors/article_scraper
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port failure -> thiserror

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This commit is contained in:
Jan Lukas Gernert 2022-12-01 09:22:08 +01:00
parent d906f6b7fe
commit 27be5a3204
11 changed files with 137 additions and 366 deletions
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59
src/full_text_parser/mod.rs
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@ -6,12 +6,11 @@ mod fingerprints;
mod tests;
use self::config::{ConfigCollection, ConfigEntry};
use self::error::{FullTextParserError, FullTextParserErrorKind};
use self::error::FullTextParserError;
use crate::article::Article;
use crate::util::Util;
use chrono::DateTime;
use encoding_rs::Encoding;
use failure::ResultExt;
use fingerprints::Fingerprints;
use libxml::parser::Parser;
use libxml::tree::{Document, Node, SaveOptions};
@ -44,7 +43,7 @@ impl FullTextParser {
let global_config = self
.config_files
.get("global.txt")
.ok_or(FullTextParserErrorKind::Config)?;
.ok_or(FullTextParserError::Config)?;
let headers = Util::generate_headers(config, global_config)?;
@ -55,9 +54,8 @@ impl FullTextParser {
.await
.map_err(|err| {
error!("Failed head request to: '{}' - '{}'", url.as_str(), err);
err
})
.context(FullTextParserErrorKind::Http)?;
FullTextParserError::Http
})?;
// check if url redirects and we need to pick up the new url
let url = if let Some(new_url) = Util::check_redirect(&response, url) {
@ -69,7 +67,7 @@ impl FullTextParser {
// check if we are dealing with text/html
if !Util::check_content_type(&response)? {
return Err(FullTextParserErrorKind::ContentType.into());
return Err(FullTextParserError::ContentType);
}
let mut article = Article {
@ -80,9 +78,9 @@ impl FullTextParser {
html: None,
};
let mut document = Document::new().map_err(|()| FullTextParserErrorKind::Xml)?;
let mut document = Document::new().map_err(|()| FullTextParserError::Xml)?;
let mut root =
Node::new("article", None, &document).map_err(|()| FullTextParserErrorKind::Xml)?;
Node::new("article", None, &document).map_err(|()| FullTextParserError::Xml)?;
document.set_root_element(&root);
Self::generate_head(&mut root, &document)?;
@ -92,7 +90,7 @@ impl FullTextParser {
let context = Context::new(&document).map_err(|()| {
error!("Failed to create xpath context for extracted article");
FullTextParserErrorKind::Xml
FullTextParserError::Xml
})?;
if let Err(error) = Self::prevent_self_closing_tags(&context) {
@ -209,14 +207,14 @@ impl FullTextParser {
let parser = Parser::default_html();
Ok(parser.parse_string(html.as_str()).map_err(|err| {
error!("Parsing HTML failed for downloaded HTML {:?}", err);
FullTextParserErrorKind::Xml
FullTextParserError::Xml
})?)
}
fn get_xpath_ctx(doc: &Document) -> Result<Context, FullTextParserError> {
Ok(Context::new(doc).map_err(|()| {
error!("Creating xpath context failed for downloaded HTML");
FullTextParserErrorKind::Xml
FullTextParserError::Xml
})?)
}
@ -256,16 +254,15 @@ impl FullTextParser {
url.as_str(),
err
);
err
})
.context(FullTextParserErrorKind::Http)?;
FullTextParserError::Http
})?;
if response.status().is_success() {
let headers = response.headers().clone();
let text = response
.text()
.await
.context(FullTextParserErrorKind::Http)?;
.map_err(|_| FullTextParserError::Http)?;
{
if let Some(decoded_html) =
Self::decode_html(&text, Self::get_encoding_from_html(&text))
@ -284,7 +281,7 @@ impl FullTextParser {
return Ok(text);
}
Err(FullTextParserErrorKind::Http.into())
Err(FullTextParserError::Http)
}
fn get_encoding_from_http_header(headers: &reqwest::header::HeaderMap) -> Option<&str> {
@ -338,7 +335,7 @@ impl FullTextParser {
}
None => {
error!("Getting config failed due to bad Url");
Err(FullTextParserErrorKind::Config.into())
Err(FullTextParserError::Config)
}
}
}
@ -366,7 +363,7 @@ impl FullTextParser {
for mut node in node_vec {
if let Some(correct_url) = node.get_property(property_url) {
if node.set_property("src", &correct_url).is_err() {
return Err(FullTextParserErrorKind::Xml.into());
return Err(FullTextParserError::Xml);
}
}
}
@ -385,7 +382,7 @@ impl FullTextParser {
node.unlink();
video_wrapper.add_child(&mut node).map_err(|_| {
error!("Failed to add iframe as child of video wrapper <div>");
FullTextParserErrorKind::Xml
FullTextParserError::Xml
})?;
}
}
@ -393,7 +390,7 @@ impl FullTextParser {
}
error!("Failed to add video wrapper <div> as parent of iframe");
return Err(FullTextParserErrorKind::Xml.into());
return Err(FullTextParserError::Xml);
}
error!("Failed to get parent of iframe");
@ -413,7 +410,7 @@ impl FullTextParser {
let node_vec = Util::evaluate_xpath(context, xpath, false)?;
for mut node in node_vec {
if node.remove_property(attribute).is_err() {
return Err(FullTextParserErrorKind::Xml.into());
return Err(FullTextParserError::Xml);
}
}
Ok(())
@ -431,7 +428,7 @@ impl FullTextParser {
let node_vec = Util::evaluate_xpath(context, xpath, false)?;
for mut node in node_vec {
if node.set_attribute(attribute, value).is_err() {
return Err(FullTextParserErrorKind::Xml.into());
return Err(FullTextParserError::Xml);
}
}
Ok(())
@ -449,7 +446,7 @@ impl FullTextParser {
}
}
Err(FullTextParserErrorKind::Xml.into())
Err(FullTextParserError::Xml)
}
fn repair_urls(
@ -464,7 +461,7 @@ impl FullTextParser {
if let Err(url::ParseError::RelativeUrlWithoutBase) = url::Url::parse(&val) {
if let Ok(fixed_url) = Self::complete_url(article_url, &val) {
if node.set_attribute(attribute, fixed_url.as_str()).is_err() {
return Err(FullTextParserErrorKind::Scrape.into());
return Err(FullTextParserError::Scrape);
}
}
}
@ -486,7 +483,7 @@ impl FullTextParser {
completed_url.push_str("//");
completed_url.push_str(host);
}
_ => return Err(FullTextParserErrorKind::Scrape.into()),
_ => return Err(FullTextParserError::Scrape),
};
}
@ -494,7 +491,7 @@ impl FullTextParser {
completed_url.push('/');
}
completed_url.push_str(incomplete_url);
let url = url::Url::parse(&completed_url).context(FullTextParserErrorKind::Url)?;
let url = url::Url::parse(&completed_url)?;
Ok(url)
}
@ -678,7 +675,7 @@ impl FullTextParser {
if !found_something {
log::error!("no body found");
return Err(FullTextParserErrorKind::Scrape.into());
return Err(FullTextParserError::Scrape);
}
Ok(())
@ -694,7 +691,7 @@ impl FullTextParser {
let node_vec = Util::evaluate_xpath(context, xpath, false)?;
for mut node in node_vec {
if node.get_property("style").is_some() && node.remove_property("style").is_err() {
return Err(FullTextParserErrorKind::Xml.into());
return Err(FullTextParserError::Xml);
}
node.unlink();
@ -702,7 +699,7 @@ impl FullTextParser {
found_something = true;
} else {
error!("Failed to add body to prepared document");
return Err(FullTextParserErrorKind::Xml.into());
return Err(FullTextParserError::Xml);
}
}
}
@ -748,7 +745,7 @@ impl FullTextParser {
}
}
Err(FullTextParserErrorKind::Xml.into())
Err(FullTextParserError::Xml)
}
fn prevent_self_closing_tags(context: &Context) -> Result<(), FullTextParserError> {