Is there a way to scrape XML content with Scraper (Rust)?

Scraper is a Rust crate for parsing HTML based on the html5ever and selectors libraries. It's designed to provide an easy-to-use interface for working with HTML documents in Rust. While Scraper is primarily focused on HTML, XML and HTML share many similarities, which means that for simple XML documents that do not rely on XML-specific features like namespaces, you might be able to use Scraper to parse and navigate the document.

However, if the XML content you want to scrape relies on XML-specific features or if you need to respect the exact XML document structure, you would be better off using an XML-specific library like xml-rs or quick-xml in Rust. These libraries are designed to handle XML parsing with more precision and adherence to XML standards.

If you still want to use Scraper for XML-like content, here's a basic example of how you might do that in Rust:

extern crate scraper;

use scraper::{Html, Selector};

fn main() {
    // This is a simple XML-like string, which we'll pretend is HTML for this example.
    let xml_content = r#"
        <items>
            <item>
                <name>Item 1</name>
                <price>10</price>
            </item>
            <item>
                <name>Item 2</name>
                <price>20</price>
            </item>
        </items>
    "#;

    // Parse the string as an HTML document (even though it's XML-like).
    let document = Html::parse_document(xml_content);

    // Create a selector to find all the 'item' elements.
    let item_selector = Selector::parse("item").unwrap();

    // Iterate over each item element.
    for item in document.select(&item_selector) {
        // You could then use another selector to extract the name and price.
        let name_selector = Selector::parse("name").unwrap();
        let price_selector = Selector::parse("price").unwrap();

        if let Some(name) = item.select(&name_selector).next() {
            if let Some(name_text) = name.text().next() {
                println!("Name: {}", name_text.trim());
            }
        }

        if let Some(price) = item.select(&price_selector).next() {
            if let Some(price_text) = price.text().next() {
                println!("Price: {}", price_text.trim());
            }
        }
    }
}

Remember, this approach is a bit of a hack and not recommended for complex XML parsing. For more robust XML parsing, you would use an XML library like quick-xml. Here's a simple example using quick-xml:

extern crate quick_xml;
extern crate serde;
extern crate serde_xml_rs;

use quick_xml::Reader;
use quick_xml::events::Event;
use serde_xml_rs::from_str;

#[derive(Debug, Deserialize, PartialEq)]
struct Item {
    name: String,
    price: String,
}

fn main() {
    let xml_content = r#"
        <items>
            <item>
                <name>Item 1</name>
                <price>10</price>
            </item>
            <item>
                <name>Item 2</name>
                <price>20</price>
            </item>
        </items>
    "#;

    // You can parse the XML content into Rust structs with serde.
    let items: Result<Vec<Item>, _> = from_str(xml_content);
    if let Ok(items) = items {
        for item in items {
            println!("Name: {}, Price: {}", item.name, item.price);
        }
    } else {
        // Or use quick-xml's lower-level API for more control.
        let mut reader = Reader::from_str(xml_content);
        reader.trim_text(true);
        let mut buf = Vec::new();

        loop {
            match reader.read_event(&mut buf) {
                Ok(Event::Start(ref e)) => {
                    match e.name() {
                        b"item" => println!("Item start"),
                        _ => (),
                    }
                },
                Ok(Event::Text(e)) => println!("Text: {}", e.unescape_and_decode(&reader).unwrap()),
                Ok(Event::End(ref e)) => {
                    match e.name() {
                        b"item" => println!("Item end"),
                        _ => (),
                    }
                },
                Ok(Event::Eof) => break, // exits the loop when reaching end of file
                Err(e) => panic!("Error at position {}: {:?}", reader.buffer_position(), e),
                _ => (), // There are several other Event types not shown here
            }

            // This is necessary because of how quick-xml works with the buffer.
            buf.clear();
        }
    }
}

When dealing with XML, it is generally recommended to use a library that is specifically designed for XML rather than adapting an HTML library. This approach will make your code more robust and less likely to run into issues with XML-specific features.