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use std::error::Error; use std::fs::File; use std::path::{Path, PathBuf}; use std::io::{Seek, Read}; use std::io::SeekFrom::{End, Start}; use hyper::header::{Location, ContentType, Range, ContentRange, ContentLength}; use hyper::header::ByteRangeSpec::{FromTo, Last, AllFrom}; use hyper::header::ContentRangeSpec::{Bytes}; use mime_guess::{guess_mime_type, Mime}; use wrappers::Response; use types::{ PenHTTPError, PencilResult, UserError, }; use http_errors::{ HTTPError, NotFound, }; pub trait PathBound { fn open_resource(&self, resource: &str) -> File; } pub fn safe_join(directory: &str, filename: &str) -> Option<PathBuf> { let directory = Path::new(directory); let filename = Path::new(filename); match filename.to_str() { Some(filename_str) => { if filename.is_absolute() | (filename_str == "..") | (filename_str.starts_with("../")) { None } else { Some(directory.join(filename_str)) } }, None => None, } } pub fn abort(code: u16) -> PencilResult { Err(PenHTTPError(HTTPError::new(code))) } pub fn redirect(location: &str, code: u16) -> PencilResult { let mut response = Response::from(format!( "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\"> <title>Redirecting...</title> <h1>Redirecting...</h1> <p>You should be redirected automatically to target URL: <a href=\"{}\">{}</a>. If not click the link. ", location, location)); response.status_code = code; response.set_content_type("text/html"); response.headers.set(Location(location.to_string())); Ok(response) } pub fn escape(s: &str) -> String { s.replace("&", "&").replace("<", "<") .replace(">", ">").replace("\"", """) } pub fn send_file(filepath: &str, mimetype: Mime, as_attachment: bool) -> PencilResult { let filepath = Path::new(filepath); if !filepath.is_file() { return Err(PenHTTPError(NotFound)); } let file = match File::open(&filepath) { Ok(file) => file, Err(e) => { return Err(UserError::new(format!("couldn't open {}: {}", filepath.display(), e.description())).into()); } }; let mut response: Response = file.into(); response.headers.set(ContentType(mimetype)); if as_attachment { match filepath.file_name() { Some(file) => { match file.to_str() { Some(filename) => { let content_disposition = format!("attachment; filename={}", filename); response.headers.set_raw("Content-Disposition", vec![content_disposition.as_bytes().to_vec()]); }, None => return Err(UserError::new("filename unavailable, required for sending as attachment.").into()), } }, None => return Err(UserError::new("filename unavailable, required for sending as attachment.").into()), } } Ok(response) } pub fn send_file_range(filepath: &str, mimetype: Mime, as_attachment: bool, range: Option<&Range>) -> PencilResult { let filepath = Path::new(filepath); if !filepath.is_file() { return Err(PenHTTPError(NotFound)); } let mut file = match File::open(&filepath) { Ok(file) => file, Err(e) => return Err(UserError::new(format!("couldn't open {}: {}", filepath.display(), e.description())).into()), }; let len = file.metadata().map_err(|_| PenHTTPError(HTTPError::InternalServerError))?.len(); let mut response: Response = match range { Some(&Range::Bytes(ref vec_ranges)) => { if vec_ranges.len() != 1 { return Err(PenHTTPError(HTTPError::NotImplemented)) }; match vec_ranges[0] { FromTo(s, e) => { file.seek(Start(s)) .map_err(|_| PenHTTPError(HTTPError::InternalServerError))?; let mut resp = Response::new(file.take(e-s+1)); resp.status_code = 206; resp.headers.set(ContentLength(e-s+1)); resp.headers.set(ContentRange( Bytes{range: Some((s, e)), instance_length: Some(len)} )); resp }, AllFrom(s) => { file.seek(Start(s)) .map_err(|_| PenHTTPError(HTTPError::InternalServerError))?; let mut resp = Response::new(file); resp.status_code = 206; resp.headers.set(ContentLength(len-s)); resp.headers.set(ContentRange( Bytes{range: Some((s, len-1)), instance_length: Some(len)} )); resp }, Last(l) => { file.seek(End(-(l as i64))) .map_err(|_| PenHTTPError(HTTPError::InternalServerError))?; let mut resp = Response::new(file); resp.status_code = 206; resp.headers.set(ContentLength(l)); resp.headers.set(ContentRange( Bytes{range: Some((len-l, len-1)), instance_length: Some(len)} )); resp }, } }, Some(_) => return Err(PenHTTPError(HTTPError::NotImplemented)), None => { let mut resp = Response::new(file); resp.headers.set(ContentLength(len)); resp }, }; response.headers.set(ContentType(mimetype)); if as_attachment { match filepath.file_name() { Some(file) => { match file.to_str() { Some(filename) => { let content_disposition = format!("attachment; filename={}", filename); response.headers.set_raw("Content-Disposition", vec![content_disposition.as_bytes().to_vec()]); }, None => return Err(UserError::new("filename unavailable, required for sending as attachment.").into()), } }, None => return Err(UserError::new("filename unavailable, required for sending as attachment.").into()), } } Ok(response) } pub fn send_from_directory(directory: &str, filename: &str, as_attachment: bool) -> PencilResult { match safe_join(directory, filename) { Some(filepath) => { let mimetype = guess_mime_type(filepath.as_path()); match filepath.as_path().to_str() { Some(filepath) => send_file(filepath, mimetype, as_attachment), None => Err(PenHTTPError(NotFound)), } }, None => Err(PenHTTPError(NotFound)), } } pub fn send_from_directory_range(directory: &str, filename: &str, as_attachment: bool, range: Option<&Range>) -> PencilResult { match safe_join(directory, filename) { Some(filepath) => { let mimetype = guess_mime_type(filepath.as_path()); match filepath.as_path().to_str() { Some(filepath) => { send_file_range(filepath, mimetype, as_attachment, range) }, None => { Err(PenHTTPError(NotFound)) } } }, None => { Err(PenHTTPError(NotFound)) } } }