use super::*;
use anyhow::{anyhow, bail, Context, Result};
use fancy_regex::Regex;
use futures_util::{stream, StreamExt};
use http::header::CONTENT_TYPE;
use reqwest::Url;
use scraper::{Html, Selector};
use serde::Deserialize;
use serde_json::Value;
use std::sync::LazyLock;
use std::{
collections::{HashMap, HashSet},
sync::Arc,
time::Duration,
};
use tokio::io::AsyncWriteExt;
use tokio::sync::Semaphore;
pub const URL_LOADER: &str = "url";
pub const RECURSIVE_URL_LOADER: &str = "recursive_url";
pub const MEDIA_URL_EXTENSION: &str = "media_url";
pub const DEFAULT_EXTENSION: &str = "txt";
const MAX_CRAWLS: usize = 5;
const BREAK_ON_ERROR: bool = false;
const USER_AGENT: &str = "curl/8.6.0";
static CLIENT: LazyLock<Result<reqwest::Client>> = LazyLock::new(|| {
let builder = reqwest::ClientBuilder::new().timeout(Duration::from_secs(16));
let client = builder.build()?;
Ok(client)
});
static PRESET: LazyLock<Vec<(Regex, CrawlOptions)>> = LazyLock::new(|| {
vec![
(
Regex::new(r"github.com/([^/]+)/([^/]+)/tree/([^/]+)").unwrap(),
CrawlOptions {
exclude: vec!["changelog".into(), "changes".into(), "license".into()],
..Default::default()
},
),
(
Regex::new(r"github.com/([^/]+)/([^/]+)/wiki").unwrap(),
CrawlOptions {
exclude: vec!["_history".into()],
extract: Some("#wiki-body".into()),
..Default::default()
},
),
]
});
static EXTENSION_RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"\.[^.]+$").unwrap());
static GITHUB_REPO_RE: LazyLock<Regex> =
LazyLock::new(|| Regex::new(r"^https://github\.com/([^/]+)/([^/]+)/tree/([^/]+)").unwrap());
pub async fn fetch(url: &str) -> Result<String> {
let client = match *CLIENT {
Ok(ref client) => client,
Err(ref err) => bail!("{err}"),
};
let res = client.get(url).send().await?;
let output = res.text().await?;
Ok(output)
}
pub async fn fetch_with_loaders(
loaders: &HashMap<String, String>,
path: &str,
allow_media: bool,
) -> Result<(String, String)> {
if let Some(loader_command) = loaders.get(URL_LOADER) {
let contents = run_loader_command(path, URL_LOADER, loader_command)?;
return Ok((contents, DEFAULT_EXTENSION.into()));
}
let client = match *CLIENT {
Ok(ref client) => client,
Err(ref err) => bail!("{err}"),
};
let mut res = client.get(path).send().await?;
if !res.status().is_success() {
bail!("Invalid status: {}", res.status());
}
let content_type = res
.headers()
.get(CONTENT_TYPE)
.and_then(|v| v.to_str().ok())
.map(|v| match v.split_once(';') {
Some((mime, _)) => mime.trim(),
None => v,
})
.map(|v| v.to_string())
.unwrap_or_else(|| {
format!(
"_/{}",
get_patch_extension(path).unwrap_or_else(|| DEFAULT_EXTENSION.into())
)
});
let mut is_media = false;
let extension = match content_type.as_str() {
"application/pdf" => "pdf".into(),
"application/vnd.openxmlformats-officedocument.wordprocessingml.document" => "docx".into(),
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" => "xlsx".into(),
"application/vnd.openxmlformats-officedocument.presentationml.presentation" => {
"pptx".into()
}
"application/vnd.oasis.opendocument.text" => "odt".into(),
"application/vnd.oasis.opendocument.spreadsheet" => "ods".into(),
"application/vnd.oasis.opendocument.presentation" => "odp".into(),
"application/rtf" => "rtf".into(),
"text/javascript" => "js".into(),
"text/html" => "html".into(),
_ => content_type
.rsplit_once('/')
.map(|(first, last)| {
if ["image", "video", "audio"].contains(&first) {
is_media = true;
MEDIA_URL_EXTENSION.into()
} else {
last.to_lowercase()
}
})
.unwrap_or_else(|| DEFAULT_EXTENSION.into()),
};
let result = if is_media {
if !allow_media {
bail!("Unexpected media type")
}
let image_bytes = res.bytes().await?;
let image_base64 = base64_encode(&image_bytes);
let contents = format!("data:{content_type};base64,{image_base64}");
(contents, extension)
} else {
match loaders.get(&extension) {
Some(loader_command) => {
let save_path = temp_file("-download-", &format!(".{extension}"))
.display()
.to_string();
let mut save_file = tokio::fs::File::create(&save_path).await?;
let mut size = 0;
while let Some(chunk) = res.chunk().await? {
size += chunk.len();
save_file.write_all(&chunk).await?;
}
let contents = if size == 0 {
println!("{}", warning_text(&format!("No content at '{path}'")));
String::new()
} else {
run_loader_command(&save_path, &extension, loader_command)?
};
(contents, DEFAULT_EXTENSION.into())
}
None => {
let contents = res.text().await?;
if extension == "html" {
(html_to_md(&contents), "md".into())
} else {
(contents, extension)
}
}
}
};
Ok(result)
}
pub async fn fetch_models(api_base: &str, api_key: Option<&str>) -> Result<Vec<String>> {
let client = match *CLIENT {
Ok(ref client) => client,
Err(ref err) => bail!("{err}"),
};
let mut builder = client.get(format!("{}/models", api_base.trim_end_matches('/')));
if let Some(api_key) = api_key {
builder = builder.bearer_auth(api_key);
}
let res_body: Value = builder.send().await?.json().await?;
let mut result: Vec<String> = res_body
.get("data")
.and_then(|v| v.as_array())
.map(|v| {
v.iter()
.filter_map(|v| v.get("id").and_then(|v| v.as_str().map(|v| v.to_string())))
.collect()
})
.unwrap_or_default();
if result.is_empty() {
bail!("No valid models")
}
result.sort_unstable();
Ok(result)
}
#[derive(Debug, Clone, Default)]
pub struct CrawlOptions {
extract: Option<String>,
exclude: Vec<String>,
no_log: bool,
}
impl CrawlOptions {
pub fn preset(start_url: &str) -> CrawlOptions {
for (re, options) in PRESET.iter() {
if let Ok(true) = re.is_match(start_url) {
return options.clone();
}
}
CrawlOptions::default()
}
}
pub async fn crawl_website(start_url: &str, options: CrawlOptions) -> Result<Vec<Page>> {
let start_url = Url::parse(start_url)?;
let mut paths = vec![start_url.path().to_string()];
let normalized_start_url = normalize_start_url(&start_url);
if !options.no_log {
println!(
"Start crawling url={start_url} exclude={} extract={}",
options.exclude.join(","),
options.extract.as_deref().unwrap_or_default()
);
}
if let Ok(true) = GITHUB_REPO_RE.is_match(start_url.as_str()) {
paths = crawl_gh_tree(&start_url, &options.exclude)
.await
.with_context(|| "Failed to craw github repo".to_string())?;
}
let semaphore = Arc::new(Semaphore::new(MAX_CRAWLS));
let mut result_pages = Vec::new();
let mut index = 0;
while index < paths.len() {
let batch = paths[index..std::cmp::min(index + MAX_CRAWLS, paths.len())].to_vec();
let tasks: Vec<_> = batch
.iter()
.map(|path| {
let options = options.clone();
let permit = semaphore.clone().acquire_owned(); let normalized_start_url = normalized_start_url.clone();
let path = path.clone();
async move {
let _permit = permit.await?;
let url = normalized_start_url
.join(&path)
.map_err(|_| anyhow!("Invalid crawl page at {}", path))?;
let mut page = crawl_page(&normalized_start_url, &path, options)
.await
.with_context(|| format!("Failed to crawl {}", url.as_str()))?;
page.0 = url.as_str().to_string();
Ok(page)
}
})
.collect();
let results = stream::iter(tasks)
.buffer_unordered(MAX_CRAWLS)
.collect::<Vec<_>>()
.await;
let mut new_paths = Vec::new();
for res in results {
match res {
Ok((path, text, links)) => {
if !options.no_log {
println!("Crawled {path}");
}
if !text.is_empty() {
result_pages.push(Page { path, text });
}
for link in links {
if !paths.iter().any(|p| match_link(p, &link)) {
new_paths.push(link);
}
}
}
Err(err) => {
if BREAK_ON_ERROR {
return Err(err);
} else if !options.no_log {
println!("{}", error_text(&pretty_error(&err)));
}
}
}
}
paths.extend(new_paths);
index += batch.len();
}
Ok(result_pages)
}
#[derive(Debug, Deserialize)]
pub struct Page {
pub path: String,
pub text: String,
}
async fn crawl_gh_tree(start_url: &Url, exclude: &[String]) -> Result<Vec<String>> {
let path_segs: Vec<&str> = start_url.path().split('/').collect();
if path_segs.len() < 4 {
bail!("Invalid gh tree {}", start_url.as_str());
}
let client = match *CLIENT {
Ok(ref client) => client,
Err(ref err) => bail!("{err}"),
};
let owner = path_segs[1];
let repo = path_segs[2];
let branch = path_segs[4];
let root_path = path_segs[5..].join("/");
let url = format!("https://api.github.com/repos/{owner}/{repo}/git/ref/heads/{branch}");
let res_body: Value = client
.get(&url)
.header("User-Agent", USER_AGENT)
.header("Accept", "application/vnd.github+json")
.header("X-GitHub-Api-Version", "2022-11-28")
.send()
.await?
.json()
.await?;
let sha = res_body["object"]["sha"]
.as_str()
.ok_or_else(|| anyhow!("Not found branch or tag"))?;
let url = format!("https://api.github.com/repos/{owner}/{repo}/git/trees/{sha}?recursive=true");
let res_body: Value = client
.get(&url)
.header("User-Agent", USER_AGENT)
.header("Accept", "application/vnd.github+json")
.header("X-GitHub-Api-Version", "2022-11-28")
.send()
.await?
.json()
.await?;
let tree = res_body["tree"]
.as_array()
.ok_or_else(|| anyhow!("Invalid github repo tree"))?;
let paths = tree
.iter()
.flat_map(|v| {
let typ = v["type"].as_str()?;
let path = v["path"].as_str()?;
if typ == "blob"
&& (path.ends_with(".md") || path.ends_with(".MD"))
&& path.starts_with(&root_path)
&& !should_exclude_link(path, exclude)
{
Some(format!(
"https://raw.githubusercontent.com/{owner}/{repo}/{branch}/{path}"
))
} else {
None
}
})
.collect();
Ok(paths)
}
async fn crawl_page(
start_url: &Url,
path: &str,
options: CrawlOptions,
) -> Result<(String, String, Vec<String>)> {
let client = match *CLIENT {
Ok(ref client) => client,
Err(ref err) => bail!("{err}"),
};
let location = start_url.join(path)?;
let response = client
.get(location.as_str())
.header("User-Agent", USER_AGENT)
.send()
.await?;
let body = response.text().await?;
if let Ok(true) = GITHUB_REPO_RE.is_match(start_url.as_str()) {
return Ok((path.to_string(), body, vec![]));
}
let mut links = HashSet::new();
let document = Html::parse_document(&body);
let selector = Selector::parse("a").map_err(|err| anyhow!("Invalid link selector, {}", err))?;
for element in document.select(&selector) {
if let Some(href) = element.value().attr("href") {
let href = Url::parse(href).ok().or_else(|| location.join(href).ok());
match href {
None => continue,
Some(href) => {
if href.as_str().starts_with(location.as_str())
&& !should_exclude_link(href.path(), &options.exclude)
{
links.insert(href.path().to_string());
}
}
}
}
}
let text = if let Some(selector) = &options.extract {
let selector = Selector::parse(selector)
.map_err(|err| anyhow!("Invalid extract selector, {}", err))?;
document
.select(&selector)
.map(|v| html_to_md(&v.html()))
.collect::<Vec<String>>()
.join("\n\n")
} else {
html_to_md(&body)
};
Ok((path.to_string(), text, links.into_iter().collect()))
}
fn should_exclude_link(link: &str, exclude: &[String]) -> bool {
if link.contains("#") {
return true;
}
let parts: Vec<&str> = link.trim_end_matches('/').split('/').collect();
let name = parts.last().unwrap_or(&"").to_lowercase();
for exclude_name in exclude {
let cond = match EXTENSION_RE.is_match(exclude_name) {
Ok(true) => exclude_name.to_lowercase() == name.to_lowercase(),
_ => exclude_name.to_lowercase() == EXTENSION_RE.replace(&name, "").to_lowercase(),
};
if cond {
return true;
}
}
false
}
fn normalize_start_url(start_url: &Url) -> Url {
let mut start_url = start_url.clone();
start_url.set_query(None);
start_url.set_fragment(None);
let new_path = match start_url.path().rfind('/') {
Some(last_slash_index) => start_url.path()[..last_slash_index + 1].to_string(),
None => start_url.path().to_string(),
};
start_url.set_path(&new_path);
start_url
}
fn match_link(path: &str, link: &str) -> bool {
path == link
|| path
== link
.trim_end_matches("/index.html")
.trim_end_matches("/index.htm")
}