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#![cfg(any(unix, target_os = "redox"))] #![doc(html_root_url = "https://docs.rs/xdg_mime/0.3.3")] #![allow(dead_code)] //! `xdg_mime` allows to look up the MIME type associated to a file name //! or to the contents of a file, using the [Freedesktop.org Shared MIME //! database specification][xdg-mime]. //! //! Alongside the MIME type, the shared MIME database contains other ancillary //! information, like the icon associated to the MIME type; the aliases for //! a given MIME type; and the various sub-classes of a MIME type. //! //! [xdg-mime]: https://specifications.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html //! //! ## Loading the Shared MIME database //! //! The [`SharedMimeInfo`](struct.SharedMimeInfo.html) type will automatically //! load all the instances of shared MIME databases available in the following //! directories, in this specified order: //! //! - `$XDG_DATA_HOME/mime` //! - if `XDG_DATA_HOME` is unset, this corresponds to `$HOME/.local/share/mime` //! - `$XDG_DATA_DIRS/mime` //! - if `XDG_DATA_DIRS` is unset, this corresponds to `/usr/local/share/mime` //! and `/usr/share/mime` //! //! For more information on the `XDG_DATA_HOME` and `XDG_DATA_DIRS` environment //! variables, see the [XDG base directory specification][xdg-basedir]. //! //! [xdg-basedir]: https://specifications.freedesktop.org/basedir-spec/latest/ //! //! The MIME data in each directory will be coalesced into a single database. //! //! ## Retrieving the MIME type of a file //! //! If you want to know the MIME type of a file, you typically have two //! options at your disposal: //! //! - guess from the file name, using the [`get_mime_types_from_file_name`] //! method //! - use an appropriately sized chunk of the file contents and //! perform "content sniffing", using the [`get_mime_type_for_data`] method //! //! The former step does not come with performance penalties, or even requires //! the file to exist in the first place, but it may return a list of potential //! matches; the latter can be an arbitrarily expensive operation to perform, //! but its result is going to be certain. It is recommended to always guess the //! MIME type from the file name first, and only use content sniffing lazily and, //! possibly, asynchronously. //! //! [`get_mime_types_from_file_name`]: struct.SharedMimeInfo.html#method.get_mime_types_from_file_name //! [`get_mime_type_for_data`]: struct.SharedMimeInfo.html#method.get_mime_type_for_data //! //! ## Guessing the MIME type //! //! If you have access to a file name or its contents, it's possible to use //! the [`guess_mime_type`] method to create a [`GuessBuilder`] instance, and //! populate it with the file name, its contents, or the full path to the file; //! then, call the [`guess`] method to guess the MIME type depending on the //! available information. //! //! [`GuessBuilder`]: struct.GuessBuilder.html //! [`guess_mime_type`]: struct.SharedMimeInfo.html#method.guess_mime_type //! [`guess`]: struct.GuessBuilder.html#method.guess use mime::Mime; use std::env; use std::fs; use std::fs::File; use std::io::prelude::*; use std::path::{Path, PathBuf}; use std::time::SystemTime; extern crate dirs_next; extern crate nom; mod alias; mod glob; mod icon; mod magic; mod parent; #[derive(Clone, PartialEq)] struct MimeDirectory { path: PathBuf, mtime: SystemTime, } /// The shared MIME info database. pub struct SharedMimeInfo { aliases: alias::AliasesList, parents: parent::ParentsMap, icons: Vec<icon::Icon>, generic_icons: Vec<icon::Icon>, globs: glob::GlobMap, magic: Vec<magic::MagicEntry>, mime_dirs: Vec<MimeDirectory>, } /// A builder type to specify the parameters for guessing a MIME type. /// /// Each instance of `GuessBuilder` is tied to the lifetime of the /// [`SharedMimeInfo`] instance that created it. /// /// The `GuessBuilder` returned by the [`guess_mime_type`] method is /// empty, and will always return a `mime::APPLICATION_OCTET_STREAM` /// guess. /// /// You can use the builder methods to specify the file name, the data, /// or both, to be used to guess the MIME type: /// /// ```rust /// # use std::error::Error; /// # use std::str::FromStr; /// # use mime::Mime; /// # /// # fn main() -> Result<(), Box<dyn Error>> { /// # let mime_db = xdg_mime::SharedMimeInfo::new(); /// // let mime_db = ... /// let mut guess_builder = mime_db.guess_mime_type(); /// let guess = guess_builder.file_name("foo.png").guess(); /// assert_eq!(guess.mime_type(), &Mime::from_str("image/png")?); /// # /// # Ok(()) /// # } /// ``` /// /// The guessed MIME type can have a degree of uncertainty; for instance, /// if you only set the [`file_name`] there can be multiple matching MIME /// types to choose from. Alternatively, if you only set the [`data`], the /// content might not match any existing rule. Even in the case of setting /// both the file name and the data the match can be uncertain. This /// information is preserved by the [`Guess`] type, and can be retrieved /// using the [`uncertain`] method. /// /// [`SharedMimeInfo`]: struct.SharedMimeInfo.html /// [`guess_mime_type`]: struct.SharedMimeInfo.html#method.guess_mime_type /// [`file_name`]: #method.file_name /// [`data`]: #method.data /// [`Guess`]: struct.Guess.html /// [`uncertain`]: struct.Guess.html#method.uncertain pub struct GuessBuilder<'a> { db: &'a SharedMimeInfo, file_name: Option<String>, data: Vec<u8>, metadata: Option<fs::Metadata>, path: Option<PathBuf>, } /// The result of the [`guess`] method of [`GuessBuilder`]. /// /// [`guess`]: struct.GuessBuilder.html#method.guess /// [`GuessBuilder`]: struct.GuessBuilder.html pub struct Guess { mime: mime::Mime, uncertain: bool, } impl<'a> GuessBuilder<'a> { /// Sets the file name to be used to guess its MIME type. /// /// If you have a full path, you should extract the last component, /// for instance using the [`Path::file_name()`][path_file_name] /// method. /// /// [path_file_name]: https://doc.rust-lang.org/std/path/struct.Path.html#method.file_name pub fn file_name(&mut self, name: &str) -> &mut Self { self.file_name = Some(name.to_string()); self } /// Sets the data for which you want to guess the MIME type. pub fn data(&mut self, data: &[u8]) -> &mut Self { // If we have enough data, just copy the largest chunk // necessary to match any rule in the magic entries let max_data_size = magic::max_extents(&self.db.magic); if data.len() > max_data_size { self.data.extend_from_slice(&data[..max_data_size]); } else { self.data.extend(data.iter().cloned()); } self } /// Sets the metadata of the file for which you want to get the MIME type. /// /// The metadata can be used to match an existing file or path, for instance: /// /// ```rust /// # use std::error::Error; /// use std::fs; /// use std::str::FromStr; /// use mime::Mime; /// # /// # fn main() -> Result<(), Box<dyn Error>> { /// # let mime_db = xdg_mime::SharedMimeInfo::new(); /// // let mime_db = ... /// # let metadata = fs::metadata("src/lib.rs")?; /// // let metadata = fs::metadata("/path/to/lib.rs")?; /// let mut guess_builder = mime_db.guess_mime_type(); /// let guess = guess_builder /// .file_name("lib.rs") /// .metadata(metadata) /// .guess(); /// assert_eq!(guess.mime_type(), &Mime::from_str("text/rust")?); /// # /// # Ok(()) /// # } /// ``` pub fn metadata(&mut self, metadata: fs::Metadata) -> &mut Self { self.metadata = Some(metadata); self } /// Sets the path of the file for which you want to get the MIME type. /// /// The `path` will be used by the [`guess`] method to extract the /// file name, metadata, and contents, unless you called the [`file_name`], /// [`metadata`], and [`data`] methods, respectively. /// /// ```rust /// # use std::error::Error; /// use std::fs; /// use std::str::FromStr; /// use mime::Mime; /// # /// # fn main() -> Result<(), Box<dyn Error>> { /// # let mime_db = xdg_mime::SharedMimeInfo::new(); /// // let mime_db = ... /// let mut guess_builder = mime_db.guess_mime_type(); /// let guess = guess_builder /// .path("src") /// .guess(); /// assert_eq!(guess.mime_type(), &Mime::from_str("inode/directory")?); /// # /// # Ok(()) /// # } /// ``` /// /// [`guess`]: #method.guess /// [`file_name`]: #method.file_name /// [`metadata`]: #method.metadata /// [`data`]: #method.data pub fn path<P: AsRef<Path>>(&mut self, path: P) -> &mut Self { let mut buf = PathBuf::new(); buf.push(path); self.path = Some(buf); self } /// Guesses the MIME type using the data set on the builder. The result is /// a [`Guess`] instance that contains both the guessed MIME type, and whether /// the result of the guess is certain. /// /// [`Guess`]: struct.Guess.html pub fn guess(&mut self) -> Guess { if let Some(path) = &self.path { // Fill out the metadata if self.metadata.is_none() { self.metadata = match fs::metadata(&path) { Ok(m) => Some(m), Err(_) => None, }; } fn load_data_chunk<P: AsRef<Path>>(path: P, chunk_size: usize) -> Option<Vec<u8>> { if chunk_size == 0 { return None; } let mut f = match File::open(&path) { Ok(file) => file, Err(_) => return None, }; let mut buf = vec![0u8; chunk_size]; if f.read_exact(&mut buf).is_err() { return None; } Some(buf) } // Load the minimum amount of data necessary for a match if self.data.is_empty() { let mut max_data_size = magic::max_extents(&self.db.magic); if let Some(metadata) = &self.metadata { let file_size: usize = metadata.len() as usize; if file_size < max_data_size { max_data_size = file_size; } } match load_data_chunk(&path, max_data_size) { Some(v) => self.data.extend(v), None => self.data.clear(), } } // Set the file name if self.file_name.is_none() { if let Some(file_name) = path.file_name() { self.file_name = match file_name.to_os_string().into_string() { Ok(v) => Some(v), Err(_) => None, }; } } } if let Some(metadata) = &self.metadata { let file_type = metadata.file_type(); // Special type for directories if file_type.is_dir() { return Guess { mime: "inode/directory".parse::<mime::Mime>().unwrap(), uncertain: true, }; } // Special type for symbolic links if file_type.is_symlink() { return Guess { mime: "inode/symlink".parse::<mime::Mime>().unwrap(), uncertain: true, }; } // Special type for empty files if metadata.len() == 0 { return Guess { mime: "application/x-zerosize".parse::<mime::Mime>().unwrap(), uncertain: true, }; } } let name_mime_types: Vec<mime::Mime> = match &self.file_name { Some(file_name) => self.db.get_mime_types_from_file_name(&file_name), None => Vec::new(), }; // File name match, and no conflicts if name_mime_types.len() == 1 && name_mime_types[0] != mime::APPLICATION_OCTET_STREAM { return Guess { mime: name_mime_types[0].clone(), uncertain: false, }; } let sniffed_mime = self .db .get_mime_type_for_data(&self.data) .unwrap_or_else(|| (mime::APPLICATION_OCTET_STREAM, 80)); if name_mime_types.is_empty() { // No names and no data => unknown MIME type if self.data.is_empty() { return Guess { mime: mime::APPLICATION_OCTET_STREAM, uncertain: true, }; } return Guess { mime: sniffed_mime.0.clone(), uncertain: sniffed_mime.0 == mime::APPLICATION_OCTET_STREAM, }; } else { let (mut mime, priority) = sniffed_mime; // "If no magic rule matches the data (or if the content is not // available), use the default type of application/octet-stream // for binary data, or text/plain for textual data." // -- shared-mime-info, "Recommended checking order" if mime == mime::APPLICATION_OCTET_STREAM && !self.data.is_empty() && looks_like_text(&self.data) { mime = mime::TEXT_PLAIN; } // From the content type guessing implementation in GIO: // // For security reasons we don't ever want to sniff desktop files // where we know the filename and it doesn't have a .desktop extension. // This is because desktop files allow executing any application and // we don't want to make it possible to hide them looking like something // else. if self.file_name.is_some() { let x_desktop = "application/x-desktop".parse::<mime::Mime>().unwrap(); if mime == x_desktop { mime = mime::TEXT_PLAIN; } } if mime != mime::APPLICATION_OCTET_STREAM { // We found a match with a high confidence value if priority >= 80 { return Guess { mime, uncertain: false, }; } // We have possible conflicts, but the data matches the // file name, so let's see if the sniffed MIME type is // a subclass of the MIME type associated to the file name, // and use that as a tie breaker. if name_mime_types .iter() .any(|m| self.db.mime_type_subclass(&mime, m)) { return Guess { mime, uncertain: false, }; } } // If there are conflicts, and the data does not help us, // we just pick the first result if let Some(mime_type) = name_mime_types.get(0) { return Guess { mime: mime_type.clone(), uncertain: true, }; } } // Okay, we give up Guess { mime: mime::APPLICATION_OCTET_STREAM, uncertain: true, } } } fn looks_like_text(data: &[u8]) -> bool { // "Checking the first 128 bytes of the file for ASCII // control characters is a good way to guess whether a // file is binary or text." // -- shared-mime-info, "Recommended checking order" !data .iter() .take(128) .any(|ch| ch.is_ascii_control() && !ch.is_ascii_whitespace()) } impl Guess { /// The guessed MIME type. pub fn mime_type(&self) -> &mime::Mime { &self.mime } /// Whether the guessed MIME type is uncertain. /// /// If the MIME type was guessed only from its file name there can be /// multiple matches, but the [`mime_type`] method will return just the /// first match. /// /// If you only have a file name, and you want to gather all potential /// matches, you should use the [`get_mime_types_from_file_name`] method /// instead of performing a guess. /// /// [`mime_type`]: #method.mime_type /// [`get_mime_types_from_file_name`]: struct.SharedMimeInfo.html#method.get_mime_types_from_file_name pub fn uncertain(&self) -> bool { self.uncertain } } impl Default for SharedMimeInfo { fn default() -> Self { Self::new() } } impl SharedMimeInfo { fn create() -> SharedMimeInfo { SharedMimeInfo { aliases: alias::AliasesList::new(), parents: parent::ParentsMap::new(), icons: Vec::new(), generic_icons: Vec::new(), globs: glob::GlobMap::new(), magic: Vec::new(), mime_dirs: Vec::new(), } } fn load_directory<P: AsRef<Path>>(&mut self, directory: P) { let mut mime_path = PathBuf::new(); mime_path.push(directory); mime_path.push("mime"); let aliases = alias::read_aliases_from_dir(&mime_path); self.aliases.add_aliases(aliases); let icons = icon::read_icons_from_dir(&mime_path, false); self.icons.extend(icons); let generic_icons = icon::read_icons_from_dir(&mime_path, true); self.generic_icons.extend(generic_icons); let subclasses = parent::read_subclasses_from_dir(&mime_path); self.parents.add_subclasses(subclasses); let globs = glob::read_globs_from_dir(&mime_path); self.globs.add_globs(&globs); let magic_entries = magic::read_magic_from_dir(&mime_path); self.magic.extend(magic_entries); let mime_dir = match fs::metadata(&mime_path) { Ok(v) => { let mtime = v.modified().unwrap_or_else(|_| SystemTime::now()); MimeDirectory { path: mime_path, mtime, } } Err(_) => MimeDirectory { path: mime_path, mtime: SystemTime::now(), }, }; self.mime_dirs.push(mime_dir); } /// Creates a new `SharedMimeInfo` instance containing all MIME information /// under the [standard XDG base directories][xdg-basedir]. /// /// [xdg-basedir]: http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html pub fn new() -> SharedMimeInfo { let mut db = SharedMimeInfo::create(); let data_home = dirs_next::data_dir().expect("Data directory is unset"); db.load_directory(data_home); let data_dirs = match env::var_os("XDG_DATA_DIRS") { Some(v) => env::split_paths(&v).collect(), None => vec![ PathBuf::from("/usr/local/share"), PathBuf::from("/usr/share"), ], }; for dir in data_dirs { db.load_directory(dir) } db } /// Loads all the MIME information under `directory`, and creates a new /// [`SharedMimeInfo`] instance for it. /// /// This method is only really useful for testing purposes; you should /// always use the [`new`] method, instead. /// /// [`SharedMimeInfo`]: struct.SharedMimeInfo.html /// [`new`]: #method.new pub fn new_for_directory<P: AsRef<Path>>(directory: P) -> SharedMimeInfo { let mut db = SharedMimeInfo::create(); db.load_directory(directory); db } /// Reloads the contents of the [`SharedMimeInfo`] type from the directories /// used to populate it at construction time. You should use this method /// if you're planning to keep the database around for long running operations /// or applications. /// /// This method does not do anything if the directories haven't changed /// since the time they were loaded last. /// /// This method will return `true` if the contents of the shared MIME /// database were updated. /// /// [`SharedMimeInfo`]: struct.SharedMimeInfo.html pub fn reload(&mut self) -> bool { let mut dropped_db = false; // Do not reload the data if nothing has changed for dir in &self.mime_dirs { let mtime = match fs::metadata(&dir.path) { Ok(v) => v.modified().unwrap_or_else(|_| dir.mtime), Err(_) => dir.mtime, }; // Drop everything if a directory was changed since // the last time we looked into it if dir.mtime < mtime { dropped_db = true; self.aliases.clear(); self.parents.clear(); self.globs.clear(); self.icons.clear(); self.generic_icons.clear(); self.magic.clear(); break; } } if dropped_db { let mime_dirs: Vec<MimeDirectory> = self.mime_dirs.to_vec(); self.mime_dirs.clear(); for dir in &mime_dirs { // Pop the `mime` chunk, since load_directory() will // automatically add it back let mut base_dir = PathBuf::new(); base_dir.push(&dir.path); base_dir.pop(); self.load_directory(base_dir); } } dropped_db } /// Retrieves the MIME type aliased by a MIME type, if any. pub fn unalias_mime_type(&self, mime_type: &Mime) -> Option<Mime> { self.aliases.unalias_mime_type(mime_type) } /// Looks up the icons associated to a MIME type. /// /// The icons can be looked up within the current [icon theme][xdg-icon-theme]. /// /// [xdg-icon-theme]: https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html pub fn lookup_icon_names(&self, mime_type: &Mime) -> Vec<String> { let mut res = Vec::new(); if let Some(v) = icon::find_icon(&self.icons, mime_type) { res.push(v); }; res.push(mime_type.essence_str().replace("/", "-")); match icon::find_icon(&self.generic_icons, mime_type) { Some(v) => res.push(v), None => { let generic = format!("{}-x-generic", mime_type.type_()); res.push(generic); } }; res } /// Looks up the generic icon associated to a MIME type. /// /// The icon can be looked up within the current [icon theme][xdg-icon-theme]. /// /// [xdg-icon-theme]: https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html pub fn lookup_generic_icon_name(&self, mime_type: &Mime) -> Option<String> { let res = match icon::find_icon(&self.generic_icons, mime_type) { Some(v) => v, None => format!("{}-x-generic", mime_type.type_()), }; Some(res) } /// Retrieves all the parent MIME types associated to `mime_type`. pub fn get_parents(&self, mime_type: &Mime) -> Option<Vec<Mime>> { let unaliased = match self.aliases.unalias_mime_type(mime_type) { Some(v) => v, None => return None, }; let mut res = Vec::new(); res.push(unaliased.clone()); if let Some(parents) = self.parents.lookup(&unaliased) { for parent in parents { res.push(parent.clone()); } }; Some(res) } /// Retrieves the list of matching MIME types for the given file name, /// without looking at the data inside the file. /// /// If no specific MIME-type can be determined, returns a single /// element vector containing the `application/octet-stream` MIME type. /// /// ```rust /// # use std::error::Error; /// # use std::str::FromStr; /// # use mime::Mime; /// # /// # fn main() -> Result<(), Box<dyn Error>> { /// # let mime_db = xdg_mime::SharedMimeInfo::new(); /// // let mime_db = ... /// let mime_types: Vec<Mime> = mime_db.get_mime_types_from_file_name("file.txt"); /// assert_eq!(mime_types, vec![Mime::from_str("text/plain")?]); /// # /// # Ok(()) /// # } /// ``` pub fn get_mime_types_from_file_name(&self, file_name: &str) -> Vec<Mime> { match self.globs.lookup_mime_type_for_file_name(file_name) { Some(v) => v, None => { let mut res = Vec::new(); res.push(mime::APPLICATION_OCTET_STREAM.clone()); res } } } /// Retrieves the MIME type for the given data, and the priority of the /// match. A priority above 80 means a certain match. pub fn get_mime_type_for_data(&self, data: &[u8]) -> Option<(Mime, u32)> { if data.is_empty() { let empty_mime: mime::Mime = "application/x-zerosize".parse().unwrap(); return Some((empty_mime, 100)); } magic::lookup_data(&self.magic, data) } /// Checks whether two MIME types are equal, taking into account /// eventual aliases. /// /// ```rust /// # use std::error::Error; /// # use std::str::FromStr; /// # use mime::Mime; /// # /// # fn main() -> Result<(), Box<dyn Error>> { /// # let mime_db = xdg_mime::SharedMimeInfo::new(); /// // let mime_db = ... /// let x_markdown: Mime = "text/x-markdown".parse()?; /// let markdown: Mime = "text/markdown".parse()?; /// assert!(mime_db.mime_type_equal(&x_markdown, &markdown)); /// # /// # Ok(()) /// # } /// ``` pub fn mime_type_equal(&self, mime_a: &Mime, mime_b: &Mime) -> bool { let unaliased_a = self .unalias_mime_type(mime_a) .unwrap_or_else(|| mime_a.clone()); let unaliased_b = self .unalias_mime_type(mime_b) .unwrap_or_else(|| mime_b.clone()); unaliased_a == unaliased_b } /// Checks whether a MIME type is a subclass of another MIME type. /// /// ```rust /// # use std::error::Error; /// # use std::str::FromStr; /// # use mime::Mime; /// # /// # fn main() -> Result<(), Box<dyn Error>> { /// # let mime_db = xdg_mime::SharedMimeInfo::new(); /// // let mime_db = ... /// let rust: Mime = "text/rust".parse()?; /// let text: Mime = "text/plain".parse()?; /// assert!(mime_db.mime_type_subclass(&rust, &text)); /// # /// # Ok(()) /// # } /// ``` pub fn mime_type_subclass(&self, mime_type: &Mime, base: &Mime) -> bool { let unaliased_mime = self .unalias_mime_type(mime_type) .unwrap_or_else(|| mime_type.clone()); let unaliased_base = self.unalias_mime_type(base).unwrap_or_else(|| base.clone()); if unaliased_mime == unaliased_base { return true; } // Handle super-types if unaliased_base.subtype() == mime::STAR { let base_type = unaliased_base.type_(); let unaliased_type = unaliased_mime.type_(); if base_type == unaliased_type { return true; } } // The text/plain and application/octet-stream require some // special handling: // // - All text/* types are subclasses of text/plain. // - All streamable types (ie, everything except the // inode/* types) are subclasses of application/octet-stream // // https://specifications.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html#subclassing if unaliased_base == mime::TEXT_PLAIN && unaliased_mime.type_() == mime::TEXT { return true; } if unaliased_base == mime::APPLICATION_OCTET_STREAM && unaliased_mime.type_() != "inode" { return true; } if let Some(parents) = self.parents.lookup(&unaliased_mime) { for parent in parents { if self.mime_type_subclass(parent, &unaliased_base) { return true; } } } false } /// Creates a new [`GuessBuilder`] that can be used to guess the MIME type /// of a file name, its contents, or a path. /// /// ```rust /// # use std::error::Error; /// # use std::str::FromStr; /// # use mime::Mime; /// # /// # fn main() -> Result<(), Box<dyn Error>> { /// # let mime_db = xdg_mime::SharedMimeInfo::new(); /// // let mime_db = ... /// let mut gb = mime_db.guess_mime_type(); /// let guess = gb.file_name("foo.txt").guess(); /// assert_eq!(guess.mime_type(), &mime::TEXT_PLAIN); /// assert_eq!(guess.uncertain(), false); /// # /// # Ok(()) /// # } /// ``` /// /// [`GuessBuilder`]: struct.GuessBuilder.html pub fn guess_mime_type(&self) -> GuessBuilder { GuessBuilder { db: &self, file_name: None, data: Vec::new(), metadata: None, path: None, } } } #[cfg(test)] mod tests { use super::*; use std::env; use std::str::FromStr; fn load_test_data() -> SharedMimeInfo { let cwd = env::current_dir().unwrap().to_string_lossy().into_owned(); let dir = PathBuf::from(&format!("{}/test_files", cwd)); SharedMimeInfo::new_for_directory(dir) } #[test] fn load_from_directory() { let cwd = env::current_dir().unwrap().to_string_lossy().into_owned(); let dir = PathBuf::from(&format!("{}/test_files", cwd)); SharedMimeInfo::new_for_directory(dir); } #[test] fn load_system() { let _db = SharedMimeInfo::new(); } #[test] fn load_default() { let _db: SharedMimeInfo = Default::default(); } #[test] fn reload() { // We don't load the system data in the, admittedly, remote case the system // is getting updated *while* we run the test suite. let mut _db = load_test_data(); assert_eq!(_db.reload(), false); } #[test] fn lookup_generic_icons() { let mime_db = load_test_data(); assert_eq!( mime_db.lookup_generic_icon_name(&mime::APPLICATION_JSON), Some("text-x-script".to_string()) ); assert_eq!( mime_db.lookup_generic_icon_name(&mime::TEXT_PLAIN), Some("text-x-generic".to_string()) ); } #[test] fn unalias() { let mime_db = load_test_data(); assert_eq!( mime_db.unalias_mime_type(&Mime::from_str("application/ics").unwrap()), Some(Mime::from_str("text/calendar").unwrap()) ); assert_eq!( mime_db.unalias_mime_type(&Mime::from_str("text/plain").unwrap()), None ); } #[test] fn mime_type_equal() { let mime_db = load_test_data(); assert_eq!( mime_db.mime_type_equal( &Mime::from_str("application/wordperfect").unwrap(), &Mime::from_str("application/vnd.wordperfect").unwrap(), ), true ); assert_eq!( mime_db.mime_type_equal( &Mime::from_str("application/x-gnome-app-info").unwrap(), &Mime::from_str("application/x-desktop").unwrap(), ), true ); assert_eq!( mime_db.mime_type_equal( &Mime::from_str("application/x-wordperfect").unwrap(), &Mime::from_str("application/vnd.wordperfect").unwrap(), ), true ); assert_eq!( mime_db.mime_type_equal( &Mime::from_str("application/x-wordperfect").unwrap(), &Mime::from_str("audio/x-midi").unwrap(), ), false ); assert_eq!( mime_db.mime_type_equal( &Mime::from_str("application/octet-stream").unwrap(), &Mime::from_str("text/plain").unwrap(), ), false ); assert_eq!( mime_db.mime_type_equal( &Mime::from_str("text/plain").unwrap(), &Mime::from_str("text/*").unwrap(), ), false ); } #[test] fn mime_type_for_file_name() { let mime_db = load_test_data(); assert_eq!( mime_db.get_mime_types_from_file_name("foo.txt"), vec![Mime::from_str("text/plain").unwrap()] ); assert_eq!( mime_db.get_mime_types_from_file_name("bar.gif"), vec![Mime::from_str("image/gif").unwrap()] ); } #[test] fn mime_type_for_file_data() { let mime_db = load_test_data(); let svg_data = include_bytes!("../test_files/files/rust-logo.svg"); assert_eq!( mime_db.get_mime_type_for_data(svg_data), Some((Mime::from_str("image/svg+xml").unwrap(), 80)) ); let png_data = include_bytes!("../test_files/files/rust-logo.png"); assert_eq!( mime_db.get_mime_type_for_data(png_data), Some((Mime::from_str("image/png").unwrap(), 50)) ); } #[test] fn mime_type_subclass() { let mime_db = load_test_data(); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("application/rtf").unwrap(), &Mime::from_str("text/plain").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("message/news").unwrap(), &Mime::from_str("text/plain").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("message/news").unwrap(), &Mime::from_str("message/*").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("message/news").unwrap(), &Mime::from_str("text/*").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("message/news").unwrap(), &Mime::from_str("application/octet-stream").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("application/rtf").unwrap(), &Mime::from_str("application/octet-stream").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("application/x-gnome-app-info").unwrap(), &Mime::from_str("text/plain").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("image/x-djvu").unwrap(), &Mime::from_str("image/vnd.djvu").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("image/vnd.djvu").unwrap(), &Mime::from_str("image/x-djvu").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("image/vnd.djvu").unwrap(), &Mime::from_str("text/plain").unwrap(), ), false ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("image/vnd.djvu").unwrap(), &Mime::from_str("text/*").unwrap(), ), false ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("text/*").unwrap(), &Mime::from_str("text/plain").unwrap(), ), true ); assert_eq!( mime_db.mime_type_subclass( &Mime::from_str("application/x-shellscript").unwrap(), &mime::APPLICATION_OCTET_STREAM ), true ); } #[test] fn guess_none() { let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb.guess(); assert_eq!(guess.mime_type(), &mime::APPLICATION_OCTET_STREAM); assert_eq!(guess.uncertain(), true); } #[test] fn guess_filename() { let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb.file_name("foo.txt").guess(); assert_eq!(guess.mime_type(), &mime::TEXT_PLAIN); assert_eq!(guess.uncertain(), false); } #[test] fn guess_data() { let svg_data = include_bytes!("../test_files/files/rust-logo.svg"); let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb.data(svg_data).guess(); assert_eq!(guess.mime_type(), &Mime::from_str("image/svg+xml").unwrap()); assert_eq!(guess.uncertain(), false); } #[test] fn guess_both() { let png_data = include_bytes!("../test_files/files/rust-logo.png"); let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb.file_name("rust-logo.png").data(png_data).guess(); assert_eq!(guess.mime_type(), &Mime::from_str("image/png").unwrap()); assert_eq!(guess.uncertain(), false); } #[test] fn guess_script() { let sh_data = include_bytes!("../test_files/files/script"); let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb.data(sh_data).guess(); assert_eq!( guess.mime_type(), &Mime::from_str("application/x-shellscript").unwrap() ); } #[test] fn guess_script_with_name() { let sh_data = include_bytes!("../test_files/files/gp"); let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb.file_name("gp").data(sh_data).guess(); assert_eq!( guess.mime_type(), &Mime::from_str("application/x-shellscript").unwrap() ); } #[test] fn guess_empty() { let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let cwd = env::current_dir().unwrap().to_string_lossy().into_owned(); let file = PathBuf::from(&format!("{}/test_files/files/empty", cwd)); let guess = gb.path(file).guess(); assert_ne!(guess.mime_type(), &mime::TEXT_PLAIN); assert_eq!( guess.mime_type(), &Mime::from_str("application/x-zerosize").unwrap() ); } #[test] fn guess_text() { let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let cwd = env::current_dir().unwrap().to_string_lossy().into_owned(); let file = PathBuf::from(&format!("{}/test_files/files/text", cwd)); let guess = gb.path(file).guess(); assert_eq!(guess.mime_type(), &mime::TEXT_PLAIN); } #[test] fn looks_like_text_works() { assert!(looks_like_text(&[])); assert!(looks_like_text(b"hello")); assert!(!looks_like_text(b"hello\x00")); assert!(!looks_like_text(&[0, 1, 2])); } #[test] fn guess_turtle() { let cwd = env::current_dir().unwrap().to_string_lossy().into_owned(); let ttl_file = PathBuf::from(&format!("{}/test_files/files/example.ttl", cwd)); let ttl_data = include_bytes!("../test_files/files/example.ttl"); let ttl_meta = std::fs::metadata(ttl_file).unwrap(); let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb .file_name("example.ttl") .metadata(ttl_meta) .data(ttl_data) .guess(); assert_eq!(guess.mime_type(), &Mime::from_str("text/turtle").unwrap()); } #[test] fn guess_dodgy_desktop_file() { let cwd = env::current_dir().unwrap().to_string_lossy().into_owned(); let desktop_file = PathBuf::from(&format!("{}/test_files/files/launcher", cwd)); let desktop_data = include_bytes!("../test_files/files/launcher"); let desktop_meta = std::fs::metadata(desktop_file).unwrap(); let mime_db = load_test_data(); let mut gb = mime_db.guess_mime_type(); let guess = gb .file_name("launcher") .metadata(desktop_meta) .data(desktop_data) .guess(); assert_eq!(guess.mime_type(), &Mime::from_str("text/plain").unwrap()); } }