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use format::Format; use errors::*; use reqwest::{Client, StatusCode, self as request}; use std::collections::HashMap; use std::io::Read; use env_variables; use url::{Url, form_urlencoded}; use url::percent_encoding::percent_decode; const YOUTUBE_VIDEO_INFO_URL: &str = "https://www.youtube.com/get_video_info"; #[derive(Serialize, Deserialize, Default)] pub struct VideoInfo { pub title: String, pub id: String, pub describe: String, pub formats: Vec<Format>, pub keywords: Vec<String>, pub author: String, pub duration: i32, } pub fn get_download_url(f: &Format) -> Result<Url> { let url_str = if let Some(u) = f.meta.get("url") { u.as_str() } else { bail!("couldn't extract url from format") }; let url_str = percent_decode(url_str.as_bytes()) .decode_utf8()? .into_owned(); Ok(Url::parse(&url_str)?) } pub fn get_filename(i: &VideoInfo, f: &Format) -> String { let title = if !i.title.is_empty() { i.title.to_owned() } else { "no title".to_string() }; format!("{} {}.{}", title, f.resolution, f.extension) } pub fn get_video_info(value: &str) -> Result<VideoInfo> { let parse_url = match Url::parse(value) { Ok(u) => u, Err(_) => { return get_video_info_from_html(value); } }; if parse_url.host_str() == Some("youtu.be") { return get_video_info_from_short_url(&parse_url); } get_video_info_from_url(&parse_url) } fn get_video_info_from_url(u: &Url) -> Result<VideoInfo> { if let Some(video_id) = u.query_pairs() .into_owned() .collect::<HashMap<String, String>>() .get("v") { return get_video_info_from_html(video_id); } bail!("invalid youtube url, no video id"); } fn get_video_info_from_short_url(u: &Url) -> Result<VideoInfo> { let path = u.path().trim_left_matches("/"); if path.len() > 0 { return get_video_info_from_html(path); } bail!("could not parse short URL"); } fn get_video_info_from_html(id: &str) -> Result<VideoInfo> { let info_url = format!("{}?video_id={}", YOUTUBE_VIDEO_INFO_URL, id); debug!("{}", info_url); let mut resp = get_client(info_url.as_str())?.get(info_url.as_str())?.send()?; if resp.status() != StatusCode::Ok { bail!("video info response invalid status code"); } let mut info = String::new(); resp.read_to_string(&mut info)?; let info = parse_query(info); let mut video_info: VideoInfo = Default::default(); match info.get("status") { Some(s) => { if s == "fail" { bail!(format!( "Error {}:{}", info.get("errorcode") .map(|s| s.as_str()) .unwrap_or_default(), info.get("reason").map(|s| s.as_str()).unwrap_or_default() )); } } None => { return Err(From::from("get video info, status not found")); } }; if let Some(title) = info.get("title") { video_info.title = title.to_string(); } else { debug!("unable to extract title"); } if let Some(author) = info.get("author") { video_info.author = author.to_string(); } else { debug!("unable to extract author"); } if let Some(length) = info.get("length_seconds") { video_info.duration = length.parse::<i32>().unwrap_or_default(); } else { debug!("unable to parse duration string"); } if let Some(keywords) = info.get("keywords") { video_info.keywords = keywords.split(",").map(|s| s.to_string()).collect(); } else { debug!("unable to extract keywords") } let mut format_strings = vec![]; if let Some(fmt_stream) = info.get("url_encoded_fmt_stream_map") { format_strings.append(&mut fmt_stream.split(",").collect()) } if let Some(adaptive_fmts) = info.get("adaptive_fmts") { format_strings.append(&mut adaptive_fmts.split(",").collect()); } let mut formats: Vec<Format> = vec![]; for v in &format_strings { let query = parse_query(v.to_string()); let itag = match query.get("itag") { Some(i) => i, None => { continue; } }; if let Ok(i) = itag.parse::<i32>() { if let Some(mut f) = Format::new(i) { if query .get("conn") .map(|s| s.as_str()) .unwrap_or_default() .starts_with("rtmp") { f.meta.insert("rtmp".to_string(), "true".to_string()); } for (k, v) in &query { f.meta.insert(k.to_string(), v.to_string()); } formats.push(f); } else { debug!("no metadata found for itag: {}, skipping...", itag) } } } video_info.formats = formats; Ok(video_info) } fn parse_query(query_str: String) -> HashMap<String, String> { let parse_query = form_urlencoded::parse(query_str.as_bytes()); return parse_query .into_owned() .collect::<HashMap<String, String>>(); } pub fn get_client(s: &str) -> Result<Client> { let client = if let Some(u) = env_variables::for_url(s) { request::Client::builder()? .proxy(request::Proxy::all(u.as_str())?) .build()? } else { request::Client::new()? }; Ok(client) }