74 lines
2.4 KiB
Rust
74 lines
2.4 KiB
Rust
use scraper::{Html, Selector};
|
||
use thiserror::Error;
|
||
use regex::Regex;
|
||
|
||
/// 定义库可能返回的错误类型
|
||
#[derive(Debug, Error)]
|
||
pub enum ScrapeError {
|
||
/// 当内部使用的CSS选择器无效时返回。
|
||
#[error("无效的CSS选择器: {0}")]
|
||
InvalidSelector(String),
|
||
/// 当正则表达式编译失败时返回。
|
||
#[error("无效的正则表达式: {0}")]
|
||
InvalidRegex(#[from] regex::Error),
|
||
}
|
||
|
||
/// 通用函数：根据CSS选择器和链接文本查找链接。
|
||
fn find_link_by_text(html_body: &str, selector_str: &str, link_text: &str) -> Result<Option<String>, ScrapeError> {
|
||
let selector = Selector::parse(selector_str)
|
||
.map_err(|e| ScrapeError::InvalidSelector(format!("'{selector_str}': {e}")))?;
|
||
|
||
let document = Html::parse_document(html_body);
|
||
|
||
for element in document.select(&selector) {
|
||
if element.text().any(|text| text.trim() == link_text) {
|
||
if let Some(link) = element.value().attr("href") {
|
||
return Ok(Some(link.to_string()));
|
||
}
|
||
}
|
||
}
|
||
|
||
Ok(None)
|
||
}
|
||
|
||
/// 解析HTML文本，查找并返回第一个匹配“编辑”按钮的链接。
|
||
pub fn find_edit_link(html_body: &str) -> Result<Option<String>, ScrapeError> {
|
||
find_link_by_text(html_body, "a.btn.btn-info.btn-xs.m-bot5", "编辑")
|
||
}
|
||
|
||
/// 解析HTML文本，查找并返回“TMS配置”按钮的链接。
|
||
pub fn find_tms_config_link(html_body: &str) -> Result<Option<String>, ScrapeError> {
|
||
find_link_by_text(html_body, "a.btn.btn-default.not-cinema", "TMS配置")
|
||
}
|
||
|
||
/// # 参数
|
||
/// * `html_body`: 一个字符串切片，包含要解析的HTML内容。
|
||
pub fn find_token(html_body: &str) -> Result<Option<String>, ScrapeError> {
|
||
// 使用属性选择器直接、高效地定位目标元素
|
||
let selector_str = r#"input[name="token"]"#;
|
||
let token_selector = Selector::parse(selector_str)
|
||
.map_err(|e| ScrapeError::InvalidSelector(format!("'{selector_str}': {e}")))?;
|
||
|
||
let document = Html::parse_document(html_body);
|
||
|
||
// 查找第一个匹配的元素并提取其 "value" 属性
|
||
if let Some(element) = document.select(&token_selector).next() {
|
||
if let Some(token_value) = element.value().attr("value") {
|
||
return Ok(Some(token_value.to_string()));
|
||
}
|
||
}
|
||
|
||
Ok(None)
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
|
||
#[test]
|
||
fn it_works() {
|
||
let result = add(2, 2);
|
||
assert_eq!(result, 4);
|
||
}
|
||
}
|