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workspace = true } +serde_urlencoded = { workspace = true } +tower = { workspace = true } +tracing = { workspace = true } +rand = { workspace = true } + +tokio = { workspace = true, optional = true } +image = { workspace = true, optional = true } +strum = { workspace = true, optional = true } +thiserror = { workspace = true, optional = true } + +[dev-dependencies] +tower-http = { workspace = true } + +[features] +default = [] +image = ["dep:image", "dep:strum", "dep:thiserror", "dep:tokio"] +"htmx-2.0.8" = [] diff --git a/crates/servable/htmx/htmx-2.0.8.min.js b/crates/servable/htmx/htmx-2.0.8.min.js new file mode 100644 index 0000000..faafa3e --- /dev/null +++ b/crates/servable/htmx/htmx-2.0.8.min.js @@ -0,0 +1 @@ +var htmx=function(){"use strict";const Q={onLoad:null,process:null,on:null,off:null,trigger:null,ajax:null,find:null,findAll:null,closest:null,values:function(e,t){const n=dn(e,t||"post");return 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t=te().querySelectorAll("[hx-trigger='restored'],[data-hx-trigger='restored']");e.addEventListener("htmx:abort",function(e){const t=e.detail.elt||e.target;const n=oe(t);if(n&&n.xhr){n.xhr.abort()}});const n=window.onpopstate?window.onpopstate.bind(window):null;window.onpopstate=function(e){if(e.state&&e.state.htmx){en();ie(t,function(e){ae(e,"htmx:restored",{document:te(),triggerEvent:ae})})}else{if(n){n(e)}}};b().setTimeout(function(){ae(e,"htmx:load",{});e=null},0)});return Q}(); \ No newline at end of file diff --git a/crates/servable/htmx/json-enc-1.9.12.js b/crates/servable/htmx/json-enc-1.9.12.js new file mode 100644 index 0000000..f37a9c5 --- /dev/null +++ b/crates/servable/htmx/json-enc-1.9.12.js @@ -0,0 +1,11 @@ +htmx.defineExtension('json-enc', { + onEvent: function (name, evt) { + if (name === "htmx:configRequest") { + evt.detail.headers['Content-Type'] = "application/json"; + } + }, + encodeParameters: function (xhr, parameters, elt) { + xhr.overrideMimeType('text/json'); + return (JSON.stringify(parameters)); + } +}); \ No newline at end of file diff --git a/crates/servable/src/lib.rs b/crates/servable/src/lib.rs new file mode 100644 index 0000000..8604905 --- /dev/null +++ b/crates/servable/src/lib.rs @@ -0,0 +1,56 @@ +#![doc = include_str!("../README.md")] + +pub mod mime; + +mod types; + +use rand::{Rng, distr::Alphanumeric}; +pub use types::*; + +mod router; +pub use router::*; + +mod servable; +pub use servable::*; + +#[cfg(test)] // Used in doctests +use tower_http as _; + +// +// +// + +#[cfg(feature = "image")] +pub mod transform; + +/// A unique string that can be used for cache-busting. +/// +/// Note that this string changes every time this code is started, +/// even if the data inside the program did not change. +pub static CACHE_BUST_STR: std::sync::LazyLock = std::sync::LazyLock::new(|| { + rand::rng() + .sample_iter(&Alphanumeric) + .take(10) + .map(char::from) + .collect() +}); + +// +// +// + +/// HTMX 2.0.8, minified +#[cfg(feature = "htmx-2.0.8")] +pub const HTMX_2_0_8: servable::StaticAsset = servable::StaticAsset { + bytes: include_str!("../htmx/htmx-2.0.8.min.js").as_bytes(), + mime: mime::MimeType::Javascript, +}; + +/// HTMX json extension, 1.19.2. +/// Compatible with: +/// - [HTMX_2_0_8] +#[cfg(feature = "htmx-2.0.8")] +pub const EXT_JSON_1_19_12: servable::StaticAsset = servable::StaticAsset { + bytes: include_str!("../htmx/json-enc-1.9.12.js").as_bytes(), + mime: mime::MimeType::Javascript, +}; diff --git a/crates/servable/src/mime.rs b/crates/servable/src/mime.rs new file mode 100644 index 0000000..476f569 --- /dev/null +++ b/crates/servable/src/mime.rs @@ -0,0 +1,811 @@ +//! Strongly-typed MIME types via [MimeType]. + +use serde::{Deserialize, Deserializer, Serialize, Serializer}; +use std::{fmt::Display, str::FromStr}; +use tracing::debug; + +/// A media type, conveniently parsed +#[derive(Debug, PartialEq, Eq, Clone)] +pub enum MimeType { + /// A mimetype we didn't recognize + Other(String), + + /// An unstructured binary blob (application/octet-stream) + Blob, + + // MARK: Audio + /// AAC audio file (audio/aac) + Aac, + /// FLAC audio file (audio/flac) + Flac, + /// MIDI audio file (audio/midi) + Midi, + /// MP3 audio file (audio/mpeg) + Mp3, + /// OGG audio file (audio/ogg) + Oga, + /// Opus audio file in Ogg container (audio/ogg) + Opus, + /// Waveform Audio Format (audio/wav) + Wav, + /// WEBM audio file (audio/webm) + Weba, + + // MARK: Video + /// AVI: Audio Video Interleave (video/x-msvideo) + Avi, + /// MP4 video file (video/mp4) + Mp4, + /// MPEG video file (video/mpeg) + Mpeg, + /// OGG video file (video/ogg) + Ogv, + /// MPEG transport stream (video/mp2t) + Ts, + /// WEBM video file (video/webm) + WebmVideo, + /// 3GPP audio/video container (video/3gpp) + ThreeGp, + /// 3GPP2 audio/video container (video/3gpp2) + ThreeG2, + + // MARK: Images + /// Animated Portable Network Graphics (image/apng) + Apng, + /// AVIF image (image/avif) + Avif, + /// Windows OS/2 Bitmap Graphics (image/bmp) + Bmp, + /// Graphics Interchange Format (image/gif) + Gif, + /// Icon format (image/vnd.microsoft.icon) + Ico, + /// JPEG image (image/jpeg) + Jpg, + /// Portable Network Graphics (image/png) + Png, + /// Quite ok Image Format + Qoi, + /// Scalable Vector Graphics (image/svg+xml) + Svg, + /// Tagged Image File Format (image/tiff) + Tiff, + /// WEBP image (image/webp) + Webp, + + // MARK: Text + /// Plain text (text/plain) + Text, + /// Cascading Style Sheets (text/css) + Css, + /// Comma-separated values (text/csv) + Csv, + /// HyperText Markup Language (text/html) + Html, + /// JavaScript (text/javascript) + Javascript, + /// JSON format (application/json) + Json, + /// JSON-LD format (application/ld+json) + JsonLd, + /// XML (application/xml) + Xml, + + // MARK: Documents + /// Adobe Portable Document Format (application/pdf) + Pdf, + /// Rich Text Format (application/rtf) + Rtf, + + // MARK: Archives + /// Archive document, multiple files embedded (application/x-freearc) + Arc, + /// BZip archive (application/x-bzip) + Bz, + /// BZip2 archive (application/x-bzip2) + Bz2, + /// GZip Compressed Archive (application/gzip) + Gz, + /// Java Archive (application/java-archive) + Jar, + /// OGG (application/ogg) + Ogg, + /// RAR archive (application/vnd.rar) + Rar, + /// 7-zip archive (application/x-7z-compressed) + SevenZ, + /// Tape Archive (application/x-tar) + Tar, + /// ZIP archive (application/zip) + Zip, + + // MARK: Fonts + /// MS Embedded OpenType fonts (application/vnd.ms-fontobject) + Eot, + /// OpenType font (font/otf) + Otf, + /// TrueType Font (font/ttf) + Ttf, + /// Web Open Font Format (font/woff) + Woff, + /// Web Open Font Format 2 (font/woff2) + Woff2, + + // MARK: Applications + /// AbiWord document (application/x-abiword) + Abiword, + /// Amazon Kindle eBook format (application/vnd.amazon.ebook) + Azw, + /// CD audio (application/x-cdf) + Cda, + /// C-Shell script (application/x-csh) + Csh, + /// Microsoft Word (application/msword) + Doc, + /// Microsoft Word OpenXML (application/vnd.openxmlformats-officedocument.wordprocessingml.document) + Docx, + /// Electronic publication (application/epub+zip) + Epub, + /// iCalendar format (text/calendar) + Ics, + /// Apple Installer Package (application/vnd.apple.installer+xml) + Mpkg, + /// OpenDocument presentation (application/vnd.oasis.opendocument.presentation) + Odp, + /// OpenDocument spreadsheet (application/vnd.oasis.opendocument.spreadsheet) + Ods, + /// OpenDocument text document (application/vnd.oasis.opendocument.text) + Odt, + /// Hypertext Preprocessor (application/x-httpd-php) + Php, + /// Microsoft PowerPoint (application/vnd.ms-powerpoint) + Ppt, + /// Microsoft PowerPoint OpenXML (application/vnd.openxmlformats-officedocument.presentationml.presentation) + Pptx, + /// Bourne shell script (application/x-sh) + Sh, + /// Microsoft Visio (application/vnd.visio) + Vsd, + /// XHTML (application/xhtml+xml) + Xhtml, + /// Microsoft Excel (application/vnd.ms-excel) + Xls, + /// Microsoft Excel OpenXML (application/vnd.openxmlformats-officedocument.spreadsheetml.sheet) + Xlsx, + /// XUL (application/vnd.mozilla.xul+xml) + Xul, +} + +// MARK: ser/de + +/* +impl utoipa::ToSchema for MimeType { + fn name() -> std::borrow::Cow<'static, str> { + std::borrow::Cow::Borrowed("MimeType") + } +} +impl utoipa::PartialSchema for MimeType { + fn schema() -> utoipa::openapi::RefOr { + utoipa::openapi::Schema::Object( + utoipa::openapi::schema::ObjectBuilder::new() + .schema_type(utoipa::openapi::schema::SchemaType::Type(Type::String)) + .description(Some( + "A media type string (e.g., 'application/json', 'text/plain')", + )) + .examples(Some("application/json")) + .build(), + ) + .into() + } +} +*/ + +impl Serialize for MimeType { + fn serialize(&self, serializer: S) -> Result + where + S: Serializer, + { + serializer.serialize_str(&self.to_string()) + } +} + +impl<'de> Deserialize<'de> for MimeType { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + let s = String::deserialize(deserializer)?; + Ok(MimeType::from_str(&s).unwrap()) + } +} + +// +// MARK: misc +// + +impl Default for MimeType { + fn default() -> Self { + Self::Blob + } +} + +impl From for MimeType { + fn from(value: String) -> Self { + Self::from_str(&value).unwrap() + } +} + +impl From<&str> for MimeType { + fn from(value: &str) -> Self { + Self::from_str(value).unwrap() + } +} + +impl From<&MimeType> for String { + fn from(value: &MimeType) -> Self { + value.to_string() + } +} + +// +// MARK: fromstr +// + +impl MimeType { + /// Parse a mimetype from a string that may contain + /// whitespace or ";" parameters. + /// + /// Parameters are discarded, write your own parser if you need them. + pub fn from_header(s: &str) -> Result::Err> { + let s = s.trim(); + let semi = s.find(';').unwrap_or(s.len()); + let space = s.find(' ').unwrap_or(s.len()); + let limit = semi.min(space); + let s = &s[0..limit]; + let s = s.trim(); + + return Self::from_str(s); + } +} + +impl FromStr for MimeType { + type Err = std::convert::Infallible; + + // Must match `display` below, but may provide other alternatives. + fn from_str(s: &str) -> Result { + Ok(match s { + "application/octet-stream" => Self::Blob, + + // Audio + "audio/aac" => Self::Aac, + "audio/flac" => Self::Flac, + "audio/midi" | "audio/x-midi" => Self::Midi, + "audio/mpeg" => Self::Mp3, + "audio/ogg" => Self::Oga, + "audio/wav" => Self::Wav, + "audio/webm" => Self::Weba, + + // Video + "video/x-msvideo" => Self::Avi, + "video/mp4" => Self::Mp4, + "video/mpeg" => Self::Mpeg, + "video/ogg" => Self::Ogv, + "video/mp2t" => Self::Ts, + "video/webm" => Self::WebmVideo, + "video/3gpp" => Self::ThreeGp, + "video/3gpp2" => Self::ThreeG2, + + // Images + "image/apng" => Self::Apng, + "image/avif" => Self::Avif, + "image/bmp" => Self::Bmp, + "image/gif" => Self::Gif, + "image/vnd.microsoft.icon" => Self::Ico, + "image/jpeg" | "image/jpg" => Self::Jpg, + "image/png" => Self::Png, + "image/svg+xml" => Self::Svg, + "image/tiff" => Self::Tiff, + "image/webp" => Self::Webp, + "image/qoi" => Self::Qoi, + + // Text + "text/plain" => Self::Text, + "text/css" => Self::Css, + "text/csv" => Self::Csv, + "text/html" => Self::Html, + "text/javascript" => Self::Javascript, + "application/json" => Self::Json, + "application/ld+json" => Self::JsonLd, + "application/xml" | "text/xml" => Self::Xml, + + // Documents + "application/pdf" => Self::Pdf, + "application/rtf" => Self::Rtf, + + // Archives + "application/x-freearc" => Self::Arc, + "application/x-bzip" => Self::Bz, + "application/x-bzip2" => Self::Bz2, + "application/gzip" | "application/x-gzip" => Self::Gz, + "application/java-archive" => Self::Jar, + "application/ogg" => Self::Ogg, + "application/vnd.rar" => Self::Rar, + "application/x-7z-compressed" => Self::SevenZ, + "application/x-tar" => Self::Tar, + "application/zip" | "application/x-zip-compressed" => Self::Zip, + + // Fonts + "application/vnd.ms-fontobject" => Self::Eot, + "font/otf" => Self::Otf, + "font/ttf" => Self::Ttf, + "font/woff" => Self::Woff, + "font/woff2" => Self::Woff2, + + // Applications + "application/x-abiword" => Self::Abiword, + "application/vnd.amazon.ebook" => Self::Azw, + "application/x-cdf" => Self::Cda, + "application/x-csh" => Self::Csh, + "application/msword" => Self::Doc, + "application/vnd.openxmlformats-officedocument.wordprocessingml.document" => Self::Docx, + "application/epub+zip" => Self::Epub, + "text/calendar" => Self::Ics, + "application/vnd.apple.installer+xml" => Self::Mpkg, + "application/vnd.oasis.opendocument.presentation" => Self::Odp, + "application/vnd.oasis.opendocument.spreadsheet" => Self::Ods, + "application/vnd.oasis.opendocument.text" => Self::Odt, + "application/x-httpd-php" => Self::Php, + "application/vnd.ms-powerpoint" => Self::Ppt, + "application/vnd.openxmlformats-officedocument.presentationml.presentation" => { + Self::Pptx + } + "application/x-sh" => Self::Sh, + "application/vnd.visio" => Self::Vsd, + "application/xhtml+xml" => Self::Xhtml, + "application/vnd.ms-excel" => Self::Xls, + "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" => Self::Xlsx, + "application/vnd.mozilla.xul+xml" => Self::Xul, + + _ => { + debug!(message = "Encountered unknown mimetype", mime_string = s); + Self::Other(s.into()) + } + }) + } +} + +// +// MARK: display +// + +impl Display for MimeType { + /// Get a string representation of this mimetype. + /// + /// The following always holds: + /// ```rust + /// # use servable::mime::MimeType; + /// # let x = MimeType::Blob; + /// assert_eq!(MimeType::from(x.to_string()), x); + /// ``` + /// + /// The following might not hold: + /// ```rust + /// # use servable::mime::MimeType; + /// # let y = "application/custom"; + /// // MimeType::from(y).to_string() may not equal y + /// ``` + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match self { + Self::Blob => write!(f, "application/octet-stream"), + + // Audio + Self::Aac => write!(f, "audio/aac"), + Self::Flac => write!(f, "audio/flac"), + Self::Midi => write!(f, "audio/midi"), + Self::Mp3 => write!(f, "audio/mpeg"), + Self::Oga => write!(f, "audio/ogg"), + Self::Opus => write!(f, "audio/ogg"), + Self::Wav => write!(f, "audio/wav"), + Self::Weba => write!(f, "audio/webm"), + + // Video + Self::Avi => write!(f, "video/x-msvideo"), + Self::Mp4 => write!(f, "video/mp4"), + Self::Mpeg => write!(f, "video/mpeg"), + Self::Ogv => write!(f, "video/ogg"), + Self::Ts => write!(f, "video/mp2t"), + Self::WebmVideo => write!(f, "video/webm"), + Self::ThreeGp => write!(f, "video/3gpp"), + Self::ThreeG2 => write!(f, "video/3gpp2"), + + // Images + Self::Apng => write!(f, "image/apng"), + Self::Avif => write!(f, "image/avif"), + Self::Bmp => write!(f, "image/bmp"), + Self::Gif => write!(f, "image/gif"), + Self::Ico => write!(f, "image/vnd.microsoft.icon"), + Self::Jpg => write!(f, "image/jpeg"), + Self::Png => write!(f, "image/png"), + Self::Svg => write!(f, "image/svg+xml"), + Self::Tiff => write!(f, "image/tiff"), + Self::Webp => write!(f, "image/webp"), + Self::Qoi => write!(f, "image/qoi"), + + // Text + Self::Text => write!(f, "text/plain"), + Self::Css => write!(f, "text/css"), + Self::Csv => write!(f, "text/csv"), + Self::Html => write!(f, "text/html"), + Self::Javascript => write!(f, "text/javascript"), + Self::Json => write!(f, "application/json"), + Self::JsonLd => write!(f, "application/ld+json"), + Self::Xml => write!(f, "application/xml"), + + // Documents + Self::Pdf => write!(f, "application/pdf"), + Self::Rtf => write!(f, "application/rtf"), + + // Archives + Self::Arc => write!(f, "application/x-freearc"), + Self::Bz => write!(f, "application/x-bzip"), + Self::Bz2 => write!(f, "application/x-bzip2"), + Self::Gz => write!(f, "application/gzip"), + Self::Jar => write!(f, "application/java-archive"), + Self::Ogg => write!(f, "application/ogg"), + Self::Rar => write!(f, "application/vnd.rar"), + Self::SevenZ => write!(f, "application/x-7z-compressed"), + Self::Tar => write!(f, "application/x-tar"), + Self::Zip => write!(f, "application/zip"), + + // Fonts + Self::Eot => write!(f, "application/vnd.ms-fontobject"), + Self::Otf => write!(f, "font/otf"), + Self::Ttf => write!(f, "font/ttf"), + Self::Woff => write!(f, "font/woff"), + Self::Woff2 => write!(f, "font/woff2"), + + // Applications + Self::Abiword => write!(f, "application/x-abiword"), + Self::Azw => write!(f, "application/vnd.amazon.ebook"), + Self::Cda => write!(f, "application/x-cdf"), + Self::Csh => write!(f, "application/x-csh"), + Self::Doc => write!(f, "application/msword"), + Self::Docx => write!( + f, + "application/vnd.openxmlformats-officedocument.wordprocessingml.document" + ), + Self::Epub => write!(f, "application/epub+zip"), + Self::Ics => write!(f, "text/calendar"), + Self::Mpkg => write!(f, "application/vnd.apple.installer+xml"), + Self::Odp => write!(f, "application/vnd.oasis.opendocument.presentation"), + Self::Ods => write!(f, "application/vnd.oasis.opendocument.spreadsheet"), + Self::Odt => write!(f, "application/vnd.oasis.opendocument.text"), + Self::Php => write!(f, "application/x-httpd-php"), + Self::Ppt => write!(f, "application/vnd.ms-powerpoint"), + Self::Pptx => write!( + f, + "application/vnd.openxmlformats-officedocument.presentationml.presentation" + ), + Self::Sh => write!(f, "application/x-sh"), + Self::Vsd => write!(f, "application/vnd.visio"), + Self::Xhtml => write!(f, "application/xhtml+xml"), + Self::Xls => write!(f, "application/vnd.ms-excel"), + Self::Xlsx => write!( + f, + "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" + ), + Self::Xul => write!(f, "application/vnd.mozilla.xul+xml"), + + Self::Other(x) => write!(f, "{x}"), + } + } +} + +impl MimeType { + // + // MARK: from extension + // + + /// Try to guess a file's mime type from its extension. + /// `ext` should NOT start with a dot. + pub fn from_extension(ext: &str) -> Option { + Some(match ext { + // Audio + "aac" => Self::Aac, + "flac" => Self::Flac, + "mid" | "midi" => Self::Midi, + "mp3" => Self::Mp3, + "oga" => Self::Oga, + "opus" => Self::Opus, + "wav" => Self::Wav, + "weba" => Self::Weba, + + // Video + "avi" => Self::Avi, + "mp4" => Self::Mp4, + "mpeg" => Self::Mpeg, + "ogv" => Self::Ogv, + "ts" => Self::Ts, + "webm" => Self::WebmVideo, + "3gp" => Self::ThreeGp, + "3g2" => Self::ThreeG2, + + // Images + "apng" => Self::Apng, + "avif" => Self::Avif, + "bmp" => Self::Bmp, + "gif" => Self::Gif, + "ico" => Self::Ico, + "jpg" | "jpeg" => Self::Jpg, + "png" => Self::Png, + "svg" => Self::Svg, + "tif" | "tiff" => Self::Tiff, + "webp" => Self::Webp, + "qoi" => Self::Qoi, + + // Text + "txt" => Self::Text, + "css" => Self::Css, + "csv" => Self::Csv, + "htm" | "html" => Self::Html, + "js" | "mjs" => Self::Javascript, + "json" => Self::Json, + "jsonld" => Self::JsonLd, + "xml" => Self::Xml, + + // Documents + "pdf" => Self::Pdf, + "rtf" => Self::Rtf, + + // Archives + "arc" => Self::Arc, + "bz" => Self::Bz, + "bz2" => Self::Bz2, + "gz" => Self::Gz, + "jar" => Self::Jar, + "ogx" => Self::Ogg, + "rar" => Self::Rar, + "7z" => Self::SevenZ, + "tar" => Self::Tar, + "zip" => Self::Zip, + + // Fonts + "eot" => Self::Eot, + "otf" => Self::Otf, + "ttf" => Self::Ttf, + "woff" => Self::Woff, + "woff2" => Self::Woff2, + + // Applications + "abw" => Self::Abiword, + "azw" => Self::Azw, + "cda" => Self::Cda, + "csh" => Self::Csh, + "doc" => Self::Doc, + "docx" => Self::Docx, + "epub" => Self::Epub, + "ics" => Self::Ics, + "mpkg" => Self::Mpkg, + "odp" => Self::Odp, + "ods" => Self::Ods, + "odt" => Self::Odt, + "php" => Self::Php, + "ppt" => Self::Ppt, + "pptx" => Self::Pptx, + "sh" => Self::Sh, + "vsd" => Self::Vsd, + "xhtml" => Self::Xhtml, + "xls" => Self::Xls, + "xlsx" => Self::Xlsx, + "xul" => Self::Xul, + + _ => return None, + }) + } + + // + // MARK: to extension + // + + /// Get the extension we use for files with this type. + /// Never includes a dot. + pub fn extension(&self) -> Option<&'static str> { + match self { + Self::Blob => None, + Self::Other(_) => None, + + // Audio + Self::Aac => Some("aac"), + Self::Flac => Some("flac"), + Self::Midi => Some("midi"), + Self::Mp3 => Some("mp3"), + Self::Oga => Some("oga"), + Self::Opus => Some("opus"), + Self::Wav => Some("wav"), + Self::Weba => Some("weba"), + + // Video + Self::Avi => Some("avi"), + Self::Mp4 => Some("mp4"), + Self::Mpeg => Some("mpeg"), + Self::Ogv => Some("ogv"), + Self::Ts => Some("ts"), + Self::WebmVideo => Some("webm"), + Self::ThreeGp => Some("3gp"), + Self::ThreeG2 => Some("3g2"), + + // Images + Self::Apng => Some("apng"), + Self::Avif => Some("avif"), + Self::Bmp => Some("bmp"), + Self::Gif => Some("gif"), + Self::Ico => Some("ico"), + Self::Jpg => Some("jpg"), + Self::Png => Some("png"), + Self::Svg => Some("svg"), + Self::Tiff => Some("tiff"), + Self::Webp => Some("webp"), + Self::Qoi => Some("qoi"), + + // Text + Self::Text => Some("txt"), + Self::Css => Some("css"), + Self::Csv => Some("csv"), + Self::Html => Some("html"), + Self::Javascript => Some("js"), + Self::Json => Some("json"), + Self::JsonLd => Some("jsonld"), + Self::Xml => Some("xml"), + + // Documents + Self::Pdf => Some("pdf"), + Self::Rtf => Some("rtf"), + + // Archives + Self::Arc => Some("arc"), + Self::Bz => Some("bz"), + Self::Bz2 => Some("bz2"), + Self::Gz => Some("gz"), + Self::Jar => Some("jar"), + Self::Ogg => Some("ogx"), + Self::Rar => Some("rar"), + Self::SevenZ => Some("7z"), + Self::Tar => Some("tar"), + Self::Zip => Some("zip"), + + // Fonts + Self::Eot => Some("eot"), + Self::Otf => Some("otf"), + Self::Ttf => Some("ttf"), + Self::Woff => Some("woff"), + Self::Woff2 => Some("woff2"), + + // Applications + Self::Abiword => Some("abw"), + Self::Azw => Some("azw"), + Self::Cda => Some("cda"), + Self::Csh => Some("csh"), + Self::Doc => Some("doc"), + Self::Docx => Some("docx"), + Self::Epub => Some("epub"), + Self::Ics => Some("ics"), + Self::Mpkg => Some("mpkg"), + Self::Odp => Some("odp"), + Self::Ods => Some("ods"), + Self::Odt => Some("odt"), + Self::Php => Some("php"), + Self::Ppt => Some("ppt"), + Self::Pptx => Some("pptx"), + Self::Sh => Some("sh"), + Self::Vsd => Some("vsd"), + Self::Xhtml => Some("xhtml"), + Self::Xls => Some("xls"), + Self::Xlsx => Some("xlsx"), + Self::Xul => Some("xul"), + } + } + + // + // MARK: is_text + // + + /// Returns true if this MIME type is always plain text. + pub fn is_text(&self) -> bool { + match self { + // Text types + Self::Text => true, + Self::Css => true, + Self::Csv => true, + Self::Html => true, + Self::Javascript => true, + Self::Json => true, + Self::JsonLd => true, + Self::Xml => true, + Self::Svg => true, + Self::Ics => true, + Self::Xhtml => true, + + // Script types + Self::Csh => true, + Self::Php => true, + Self::Sh => true, + + // All other types are not plain text + Self::Other(_) => false, + Self::Blob => false, + + // Audio + Self::Aac => false, + Self::Flac => false, + Self::Midi => false, + Self::Mp3 => false, + Self::Oga => false, + Self::Opus => false, + Self::Wav => false, + Self::Weba => false, + + // Video + Self::Avi => false, + Self::Mp4 => false, + Self::Mpeg => false, + Self::Ogv => false, + Self::Ts => false, + Self::WebmVideo => false, + Self::ThreeGp => false, + Self::ThreeG2 => false, + + // Images + Self::Apng => false, + Self::Avif => false, + Self::Bmp => false, + Self::Gif => false, + Self::Ico => false, + Self::Jpg => false, + Self::Png => false, + Self::Qoi => false, + Self::Tiff => false, + Self::Webp => false, + + // Documents + Self::Pdf => false, + Self::Rtf => false, + + // Archives + Self::Arc => false, + Self::Bz => false, + Self::Bz2 => false, + Self::Gz => false, + Self::Jar => false, + Self::Ogg => false, + Self::Rar => false, + Self::SevenZ => false, + Self::Tar => false, + Self::Zip => false, + + // Fonts + Self::Eot => false, + Self::Otf => false, + Self::Ttf => false, + Self::Woff => false, + Self::Woff2 => false, + + // Applications + Self::Abiword => false, + Self::Azw => false, + Self::Cda => false, + Self::Doc => false, + Self::Docx => false, + Self::Epub => false, + Self::Mpkg => false, + Self::Odp => false, + Self::Ods => false, + Self::Odt => false, + Self::Ppt => false, + Self::Pptx => false, + Self::Vsd => false, + Self::Xls => false, + Self::Xlsx => false, + Self::Xul => false, + } + } +} diff --git a/crates/servable/src/router.rs b/crates/servable/src/router.rs new file mode 100644 index 0000000..ba47349 --- /dev/null +++ b/crates/servable/src/router.rs @@ -0,0 +1,296 @@ +use axum::{ + Router, + body::Body, + http::{HeaderMap, HeaderValue, Method, Request, StatusCode, header}, + response::{IntoResponse, Response}, +}; +use chrono::TimeDelta; +use std::{ + collections::{BTreeMap, HashMap}, + convert::Infallible, + net::SocketAddr, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Instant, +}; +use tower::Service; +use tracing::trace; + +use crate::{ + ClientInfo, RenderContext, Rendered, RenderedBody, + mime::MimeType, + servable::{Servable, ServableWithRoute}, +}; + +struct Default404 {} + +impl Servable for Default404 { + fn head<'a>( + &'a self, + _ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + return Rendered { + code: StatusCode::NOT_FOUND, + body: (), + ttl: Some(TimeDelta::days(1)), + immutable: true, + headers: HeaderMap::new(), + mime: Some(MimeType::Html), + }; + }) + } + + fn render<'a>( + &'a self, + ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { self.head(ctx).await.with_body(RenderedBody::Empty) }) + } +} + +/// A set of related [Servable]s under one route. +/// +/// Use as follows: +/// ```rust +/// use servable::{ServableRouter, StaticAsset, mime::MimeType}; +/// use axum::Router; +/// use tower_http::compression::{CompressionLayer, predicate::DefaultPredicate}; +/// +/// // Add compression, for example. +/// // Also consider CORS and timeout. +/// let compression: CompressionLayer = CompressionLayer::new() +/// .br(true) +/// .deflate(true) +/// .gzip(true) +/// .zstd(true) +/// .compress_when(DefaultPredicate::new()); +/// +/// let route = ServableRouter::new() +/// .add_page( +/// "/page", +/// StaticAsset { +/// bytes: "I am a page".as_bytes(), +/// mime: MimeType::Text, +/// }, +/// ); +/// +/// let router: Router<()> = route +/// .into_router() +/// .layer(compression.clone()); +/// ``` +#[derive(Clone)] +pub struct ServableRouter { + pages: Arc>>, + notfound: Arc, +} + +impl ServableRouter { + /// Create a new, empty [ServableRouter] + #[inline(always)] + pub fn new() -> Self { + Self { + pages: Arc::new(HashMap::new()), + notfound: Arc::new(Default404 {}), + } + } + + /// Set this server's "not found" page + #[inline(always)] + pub fn with_404(mut self, page: S) -> Self { + self.notfound = Arc::new(page); + self + } + + /// Add a [Servable] to this server at the given route. + /// - panics if route does not start with a `/`, ends with a `/`, or contains `//`. + /// - urls are normalized, routes that violate this condition will never be served. + /// - `/` is an exception, it is valid. + /// - panics if called after this service is started + /// - overwrites existing pages + #[inline(always)] + pub fn add_page(mut self, route: impl Into, page: S) -> Self { + let route = route.into(); + + if !route.starts_with("/") { + panic!("route must start with /") + }; + + if route.ends_with("/") && route != "/" { + panic!("route must not end with /") + }; + + if route.contains("//") { + panic!("route must not contain //") + }; + + #[expect(clippy::expect_used)] + Arc::get_mut(&mut self.pages) + .expect("add_pages called after service was started") + .insert(route, Arc::new(page)); + + self + } + + /// Add a [ServableWithRoute] to this server. + /// Behaves exactly like [Self::add_page]. + #[inline(always)] + pub fn add_page_with_route( + self, + servable_with_route: &'static ServableWithRoute, + ) -> Self { + self.add_page(servable_with_route.route(), servable_with_route) + } + + /// Convenience method. + /// Turns this service into a router. + /// + /// Equivalent to: + /// ```ignore + /// Router::new().fallback_service(self) + /// ``` + #[inline(always)] + pub fn into_router(self) -> Router { + Router::new().fallback_service(self) + } +} + +// +// MARK: impl Service +// + +impl Service> for ServableRouter { + type Response = Response; + type Error = Infallible; + type Future = + Pin> + Send + 'static>>; + + fn poll_ready(&mut self, _cx: &mut Context<'_>) -> Poll> { + Poll::Ready(Ok(())) + } + + fn call(&mut self, req: Request) -> Self::Future { + if req.method() != Method::GET && req.method() != Method::HEAD { + let mut headers = HeaderMap::with_capacity(1); + headers.insert(header::ACCEPT, HeaderValue::from_static("GET,HEAD")); + return Box::pin(async { + Ok((StatusCode::METHOD_NOT_ALLOWED, headers).into_response()) + }); + } + + let pages = self.pages.clone(); + let notfound = self.notfound.clone(); + Box::pin(async move { + let addr = req.extensions().get::().copied(); + let route = req.uri().path().to_owned(); + let headers = req.headers().clone(); + let query: BTreeMap = + serde_urlencoded::from_str(req.uri().query().unwrap_or("")).unwrap_or_default(); + + let start = Instant::now(); + let client_info = ClientInfo::from_headers(&headers); + let ua = headers + .get("user-agent") + .and_then(|x| x.to_str().ok()) + .unwrap_or(""); + + trace!( + message = "Serving route", + route, + addr = ?addr, + user_agent = ua, + device_type = ?client_info.device_type + ); + + // Normalize url with redirect + if (route.ends_with('/') && route != "/") || route.contains("//") { + let mut new_route = route.clone(); + while new_route.contains("//") { + new_route = new_route.replace("//", "/"); + } + let new_route = new_route.trim_matches('/'); + + trace!( + message = "Redirecting", + route, + new_route, + addr = ?addr, + user_agent = ua, + device_type = ?client_info.device_type + ); + + let mut headers = HeaderMap::with_capacity(1); + match HeaderValue::from_str(&format!("/{new_route}")) { + Ok(x) => headers.append(header::LOCATION, x), + Err(_) => return Ok(StatusCode::BAD_REQUEST.into_response()), + }; + return Ok((StatusCode::PERMANENT_REDIRECT, headers).into_response()); + } + + let ctx = RenderContext { + client_info, + route, + query, + }; + + let page = pages.get(&ctx.route).unwrap_or(¬found); + let mut rend = match req.method() == Method::HEAD { + true => page.head(&ctx).await.with_body(RenderedBody::Empty), + false => page.render(&ctx).await, + }; + + // Tweak headers + { + if !rend.headers.contains_key(header::CACHE_CONTROL) { + let max_age = rend.ttl.map(|x| x.num_seconds()).unwrap_or(1).max(1); + + let mut value = String::new(); + if rend.immutable { + value.push_str("immutable, "); + } + + value.push_str("public, "); + value.push_str(&format!("max-age={}, ", max_age)); + + #[expect(clippy::unwrap_used)] + rend.headers.insert( + header::CACHE_CONTROL, + HeaderValue::from_str(value.trim().trim_end_matches(',')).unwrap(), + ); + } + + if !rend.headers.contains_key("Accept-CH") { + rend.headers + .insert("Accept-CH", HeaderValue::from_static("Sec-CH-UA-Mobile")); + } + + if !rend.headers.contains_key(header::CONTENT_TYPE) + && let Some(mime) = &rend.mime + { + #[expect(clippy::unwrap_used)] + rend.headers.insert( + header::CONTENT_TYPE, + HeaderValue::from_str(&mime.to_string()).unwrap(), + ); + } + } + + trace!( + message = "Served route", + route = ctx.route, + addr = ?addr, + user_agent = ua, + device_type = ?client_info.device_type, + time_ns = start.elapsed().as_nanos() + ); + + Ok(match rend.body { + RenderedBody::Static(d) => (rend.code, rend.headers, d).into_response(), + RenderedBody::Bytes(d) => (rend.code, rend.headers, d).into_response(), + RenderedBody::String(s) => (rend.code, rend.headers, s).into_response(), + RenderedBody::Empty => (rend.code, rend.headers).into_response(), + }) + }) + } +} diff --git a/crates/servable/src/servable/asset.rs b/crates/servable/src/servable/asset.rs new file mode 100644 index 0000000..1596afe --- /dev/null +++ b/crates/servable/src/servable/asset.rs @@ -0,0 +1,213 @@ +use axum::http::{HeaderMap, StatusCode}; +use chrono::TimeDelta; +use std::pin::Pin; + +use crate::{RenderContext, Rendered, RenderedBody, mime::MimeType, servable::Servable}; + +const TTL: Option = Some(TimeDelta::days(1)); + +/// A static blob of bytes +pub struct StaticAsset { + /// The data to return + pub bytes: &'static [u8], + + /// The type of `bytes` + pub mime: MimeType, +} + +#[cfg(feature = "image")] +impl Servable for StaticAsset { + fn head<'a>( + &'a self, + ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + use crate::transform::TransformerChain; + use std::str::FromStr; + + let is_image = TransformerChain::mime_is_image(&self.mime); + + let transform = match (is_image, ctx.query.get("t")) { + (false, _) | (_, None) => None, + + (true, Some(x)) => match TransformerChain::from_str(x) { + Ok(x) => Some(x), + Err(_err) => { + return Rendered { + code: StatusCode::BAD_REQUEST, + body: (), + ttl: TTL, + immutable: true, + + headers: HeaderMap::new(), + mime: None, + }; + } + }, + }; + + match transform { + Some(transform) => { + return Rendered { + code: StatusCode::OK, + body: (), + ttl: TTL, + immutable: true, + + headers: HeaderMap::new(), + mime: Some( + transform + .output_mime(&self.mime) + .unwrap_or(self.mime.clone()), + ), + }; + } + + None => { + return Rendered { + code: StatusCode::OK, + body: (), + ttl: TTL, + immutable: true, + + headers: HeaderMap::new(), + mime: Some(self.mime.clone()), + }; + } + } + }) + } + + fn render<'a>( + &'a self, + ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + use crate::transform::TransformerChain; + use std::str::FromStr; + use tracing::{error, trace}; + + // Automatically provide transformation if this is an image + let is_image = TransformerChain::mime_is_image(&self.mime); + + let transform = match (is_image, ctx.query.get("t")) { + (false, _) | (_, None) => None, + + (true, Some(x)) => match TransformerChain::from_str(x) { + Ok(x) => Some(x), + Err(err) => { + return Rendered { + code: StatusCode::BAD_REQUEST, + body: RenderedBody::String(err), + ttl: TTL, + immutable: true, + + headers: HeaderMap::new(), + mime: None, + }; + } + }, + }; + + match transform { + Some(transform) => { + trace!(message = "Transforming image", ?transform); + + let task = { + let mime = Some(self.mime.clone()); + let bytes = self.bytes; + tokio::task::spawn_blocking(move || { + transform.transform_bytes(bytes, mime.as_ref()) + }) + }; + + let res = match task.await { + Ok(x) => x, + Err(error) => { + error!(message = "Error while transforming image", ?error); + return Rendered { + code: StatusCode::INTERNAL_SERVER_ERROR, + body: RenderedBody::String(format!( + "Error while transforming image: {error:?}" + )), + ttl: None, + immutable: true, + + headers: HeaderMap::new(), + mime: None, + }; + } + }; + + match res { + Ok((mime, bytes)) => { + return Rendered { + code: StatusCode::OK, + body: RenderedBody::Bytes(bytes), + ttl: TTL, + immutable: true, + + headers: HeaderMap::new(), + mime: Some(mime), + }; + } + + Err(err) => { + return Rendered { + code: StatusCode::INTERNAL_SERVER_ERROR, + body: RenderedBody::String(format!("{err}")), + ttl: TTL, + immutable: true, + + headers: HeaderMap::new(), + mime: None, + }; + } + } + } + + None => { + return Rendered { + code: StatusCode::OK, + body: RenderedBody::Static(self.bytes), + ttl: TTL, + immutable: true, + headers: HeaderMap::new(), + mime: Some(self.mime.clone()), + }; + } + } + }) + } +} + +#[cfg(not(feature = "image"))] +impl Servable for StaticAsset { + fn head<'a>( + &'a self, + _ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + return Rendered { + code: StatusCode::OK, + body: (), + ttl: TTL, + immutable: true, + + headers: HeaderMap::new(), + mime: Some(self.mime.clone()), + }; + }) + } + + fn render<'a>( + &'a self, + ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + self.head(ctx) + .await + .with_body(RenderedBody::Static(self.bytes)) + }) + } +} diff --git a/crates/servable/src/servable/html.rs b/crates/servable/src/servable/html.rs new file mode 100644 index 0000000..544beea --- /dev/null +++ b/crates/servable/src/servable/html.rs @@ -0,0 +1,302 @@ +use axum::http::{HeaderMap, StatusCode}; +use chrono::TimeDelta; +use maud::{DOCTYPE, Markup, PreEscaped, html}; +use serde::Deserialize; +use std::{hash::Hash, pin::Pin, sync::Arc}; + +use crate::{RenderContext, Rendered, RenderedBody, mime::MimeType, servable::Servable}; + +#[expect(missing_docs)] +#[derive(Debug, Clone, Hash, PartialEq, Eq, Deserialize)] +pub struct PageMetadata { + /// The title of this page. + /// Browsers display this on the page's tab. + pub title: String, + + /// The page author (metadata only) + pub author: Option, + + /// The page description (metadata only) + pub description: Option, + + /// The page image. + /// Browsers display this on the page's tab. + pub image: Option, +} + +impl Default for PageMetadata { + fn default() -> Self { + Self { + title: "Untitled page".into(), + author: None, + description: None, + image: None, + } + } +} + +#[expect(missing_docs)] +#[derive(Debug, Clone, PartialEq, Eq, Hash)] +pub enum ScriptSource { + /// Raw script data + Inline(S), + + /// Load script from a url + Linked(S), +} + +/// A complete, dynamically-rendered blob of HTML. +#[derive(Clone)] +pub struct HtmlPage { + /// This page's metadata + pub meta: PageMetadata, + + /// If true, the contents of this page never change + pub immutable: bool, + + /// How long this page's html may be cached. + /// This controls the maximum age of a page shown to the user. + /// + /// If `None`, this page is never cached. + pub ttl: Option, + + /// A function that generates this page's html. + /// + /// This should return the contents of this page's tag, + /// or the contents of a wrapper element (defined in the page server struct). + /// + /// This closure must never return `` or ``. + pub render: Arc< + dyn Send + + Sync + + 'static + + for<'a> Fn( + &'a HtmlPage, + &'a RenderContext, + ) -> Pin + Send + Sync + 'a>>, + >, + + /// The response code that should accompany this html + pub response_code: StatusCode, + + /// Scripts to include in this page. Order is preserved. + pub scripts: Vec>, + + /// Styles to include in this page. Order is preserved. + pub styles: Vec>, + + /// `name`, `content` for extra `` tags + pub extra_meta: Vec<(String, String)>, +} + +impl Default for HtmlPage { + fn default() -> Self { + HtmlPage { + // No cache by default + ttl: None, + immutable: false, + + meta: Default::default(), + render: Arc::new(|_, _| Box::pin(async { html!() })), + response_code: StatusCode::OK, + scripts: Vec::new(), + styles: Vec::new(), + extra_meta: Vec::new(), + } + } +} + +impl HtmlPage { + /// Set `self.meta` + #[inline(always)] + pub fn with_meta(mut self, meta: PageMetadata) -> Self { + self.meta = meta; + self + } + + /// Set `self.generate` + #[inline(always)] + pub fn with_render< + R: Send + + Sync + + 'static + + for<'a> Fn( + &'a HtmlPage, + &'a RenderContext, + ) -> Pin + Send + Sync + 'a>>, + >( + mut self, + render: R, + ) -> Self { + self.render = Arc::new(render); + self + } + + /// Set `self.immutable` + #[inline(always)] + pub fn with_immutable(mut self, immutable: bool) -> Self { + self.immutable = immutable; + self + } + + /// Set `self.html_ttl` + #[inline(always)] + pub fn with_ttl(mut self, ttl: Option) -> Self { + self.ttl = ttl; + self + } + + /// Set `self.response_code` + #[inline(always)] + pub fn with_code(mut self, response_code: StatusCode) -> Self { + self.response_code = response_code; + self + } + + /// Add an inline script to this page (after existing scripts) + #[inline(always)] + pub fn with_script_inline(mut self, script: impl Into) -> Self { + self.scripts.push(ScriptSource::Inline(script.into())); + self + } + + /// Add a linked script to this page (after existing scripts) + #[inline(always)] + pub fn with_script_linked(mut self, url: impl Into) -> Self { + self.scripts.push(ScriptSource::Linked(url.into())); + self + } + + /// Add a script to this page (after existing scripts) + #[inline(always)] + pub fn with_script(mut self, script: ScriptSource>) -> Self { + let script = match script { + ScriptSource::Inline(x) => ScriptSource::Inline(x.into()), + ScriptSource::Linked(x) => ScriptSource::Linked(x.into()), + }; + + self.scripts.push(script); + self + } + + /// Add an inline script to this page (after existing styles) + #[inline(always)] + pub fn with_style_inline(mut self, style: impl Into) -> Self { + self.styles.push(ScriptSource::Inline(style.into())); + self + } + + /// Add a linked style to this page (after existing styles) + #[inline(always)] + pub fn with_style_linked(mut self, url: impl Into) -> Self { + self.styles.push(ScriptSource::Linked(url.into())); + self + } + + /// Add a style to this page (after existing scripts) + #[inline(always)] + pub fn with_style(mut self, style: ScriptSource>) -> Self { + let style = match style { + ScriptSource::Inline(x) => ScriptSource::Inline(x.into()), + ScriptSource::Linked(x) => ScriptSource::Linked(x.into()), + }; + + self.scripts.push(style); + self + } + + /// Add a `` to this page (after existing `s`) + #[inline(always)] + pub fn with_extra_meta(mut self, key: impl Into, value: impl Into) -> Self { + self.extra_meta.push((key.into(), value.into())); + self + } +} + +impl Servable for HtmlPage { + fn head<'a>( + &'a self, + _ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + return Rendered { + code: self.response_code, + body: (), + ttl: self.ttl, + immutable: self.immutable, + headers: HeaderMap::new(), + mime: Some(MimeType::Html), + }; + }) + } + + fn render<'a>( + &'a self, + ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + let inner_html = (self.render)(self, ctx).await; + + let html = html! { + (DOCTYPE) + html { + head { + meta charset="UTF-8"; + meta name="viewport" content="width=device-width, initial-scale=1,user-scalable=no"; + meta content="text/html; charset=UTF-8" http-equiv="content-type"; + meta property="og:type" content="website"; + @for (name, content) in &self.extra_meta { + meta name=(name) content=(content); + } + + // + // Metadata + // + title { (PreEscaped(self.meta.title.clone())) } + meta property="og:site_name" content=(self.meta.title); + meta name="title" content=(self.meta.title); + meta property="og:title" content=(self.meta.title); + meta property="twitter:title" content=(self.meta.title); + + @if let Some(author) = &self.meta.author { + meta name="author" content=(author); + } + + @if let Some(desc) = &self.meta.description { + meta name="description" content=(desc); + meta property="og:description" content=(desc); + meta property="twitter:description" content=(desc); + } + + @if let Some(image) = &self.meta.image { + meta content=(image) property="og:image"; + link rel="shortcut icon" href=(image) type="image/x-icon"; + } + + // + // Scripts & styles + // + + @for style in &self.styles { + @match style { + ScriptSource::Linked(x) => link rel="stylesheet" type="text/css" href=(x);, + ScriptSource::Inline(x) => style { (PreEscaped(x)) } + } + } + + @for script in &self.scripts { + @match script { + ScriptSource::Linked(x) => script src=(x) {}, + ScriptSource::Inline(x) => script { (PreEscaped(x)) } + } + } + } + + body { main { (inner_html) } } + } + }; + + return self.head(ctx).await.with_body(RenderedBody::String(html.0)); + }) + } +} diff --git a/crates/servable/src/servable/mod.rs b/crates/servable/src/servable/mod.rs new file mode 100644 index 0000000..401bb15 --- /dev/null +++ b/crates/servable/src/servable/mod.rs @@ -0,0 +1,123 @@ +//! This module provides the [Servable] trait, +//! as well as a few helper structs that implement it. + +mod asset; + +pub use asset::*; + +mod html; +pub use html::*; + +mod redirect; +pub use redirect::*; + +/// Something that may be served over http. If implementing this trait, +/// refer to sample implementations in [redirect::Redirect], [asset::StaticAsset] and [html::HtmlPage]. +pub trait Servable: Send + Sync { + /// Return the same response as [Servable::render], but with an empty body. + /// + /// This method is used to respond to `HEAD` requests. + fn head<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin> + 'a + Send + Sync>>; + + /// Render this page. Must return the same metadata as [Servable::head]. + /// Consider using [crate::Rendered::with_body] and [Servable::head] to implement this fn. + /// + /// This method is used to respond to `GET` requests. + fn render<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin< + Box> + 'a + Send + Sync>, + >; +} + +// +// MARK: ServableWithRoute +// + +/// A [Servable] and the route it is available at +pub struct ServableWithRoute { + /// The resource + servable: S, + + /// The route this resource is available at + route: std::sync::LazyLock, +} + +impl ServableWithRoute { + /// Create a new [ServableWithRoute] + pub const fn new(route_init: fn() -> std::string::String, servable: S) -> Self { + Self { + servable, + route: std::sync::LazyLock::new(route_init), + } + } + + /// Get the route associated with this resource + pub fn route(&self) -> &str { + &self.route + } +} + +impl Servable for ServableWithRoute { + #[inline(always)] + fn head<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin> + 'a + Send + Sync>> { + self.servable.head(ctx) + } + + #[inline(always)] + fn render<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin< + Box> + 'a + Send + Sync>, + > { + self.servable.render(ctx) + } +} + +impl Servable for &'static S { + #[inline(always)] + fn head<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin> + 'a + Send + Sync>> { + (*self).head(ctx) + } + + #[inline(always)] + fn render<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin< + Box> + 'a + Send + Sync>, + > { + (*self).render(ctx) + } +} + +impl Servable for std::sync::LazyLock { + #[inline(always)] + fn head<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin> + 'a + Send + Sync>> { + (**self).head(ctx) + } + + #[inline(always)] + fn render<'a>( + &'a self, + ctx: &'a crate::RenderContext, + ) -> std::pin::Pin< + Box> + 'a + Send + Sync>, + > { + (**self).render(ctx) + } +} diff --git a/crates/servable/src/servable/redirect.rs b/crates/servable/src/servable/redirect.rs new file mode 100644 index 0000000..35a7870 --- /dev/null +++ b/crates/servable/src/servable/redirect.rs @@ -0,0 +1,75 @@ +use std::pin::Pin; + +use axum::http::{ + HeaderMap, HeaderValue, StatusCode, + header::{self, InvalidHeaderValue}, +}; + +use crate::{RenderContext, Rendered, RenderedBody, servable::Servable}; + +#[expect(missing_docs)] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum RedirectCode { + /// Reply with an http 307 (temporary redirect) + Http307, + + /// Reply with an http 308 (permanent redirect) + Http308, +} + +/// A simple http edirect +pub struct Redirect { + to: HeaderValue, + code: RedirectCode, +} + +impl Redirect { + /// Create a new [Redirect] to the given route. + /// Returns an http 308 (permanent redirect) + pub fn new(to: impl Into) -> Result { + Ok(Self { + to: HeaderValue::from_str(&to.into())?, + code: RedirectCode::Http308, + }) + } + + /// Create a new [Redirect] to the given route. + /// Returns an http 307 (temporary redirect) + pub fn new_307(to: impl Into) -> Result { + Ok(Self { + to: HeaderValue::from_str(&to.into())?, + code: RedirectCode::Http307, + }) + } +} + +impl Servable for Redirect { + fn head<'a>( + &'a self, + _ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { + let mut headers = HeaderMap::with_capacity(1); + headers.append(header::LOCATION, self.to.clone()); + + return Rendered { + code: match self.code { + RedirectCode::Http307 => StatusCode::TEMPORARY_REDIRECT, + RedirectCode::Http308 => StatusCode::PERMANENT_REDIRECT, + }, + headers, + body: (), + ttl: None, + immutable: true, + mime: None, + }; + }) + } + + fn render<'a>( + &'a self, + ctx: &'a RenderContext, + ) -> Pin> + 'a + Send + Sync>> { + Box::pin(async { self.head(ctx).await.with_body(RenderedBody::Empty) }) + } +} diff --git a/crates/servable/src/transform/chain.rs b/crates/servable/src/transform/chain.rs new file mode 100644 index 0000000..59f9155 --- /dev/null +++ b/crates/servable/src/transform/chain.rs @@ -0,0 +1,176 @@ +use image::{DynamicImage, ImageFormat}; +use serde::{Deserialize, Deserializer, de}; +use std::{fmt::Display, hash::Hash, io::Cursor, str::FromStr}; +use thiserror::Error; + +use super::transformers::{ImageTransformer, TransformerEnum}; +use crate::mime::MimeType; + +#[expect(missing_docs)] +#[derive(Debug, Error)] +pub enum TransformBytesError { + /// We tried to transform non-image data + #[error("{0} is not a valid image type")] + NotAnImage(String), + + /// We encountered an error while processing + /// an image. + #[error("error while processing image")] + ImageError(#[from] image::ImageError), +} + +/// A sequence of transformations to apply to an image +#[derive(Debug, Clone)] +pub struct TransformerChain { + steps: Vec, +} + +impl TransformerChain { + /// Returns `true` if `mime` is a type that can be transformed + #[inline(always)] + pub fn mime_is_image(mime: &MimeType) -> bool { + ImageFormat::from_mime_type(mime.to_string()).is_some() + } + + /// Transform the given image using this chain + #[inline(always)] + pub fn transform_image(&self, mut image: DynamicImage) -> DynamicImage { + for step in &self.steps { + match step { + TransformerEnum::Format { .. } => {} + TransformerEnum::MaxDim(t) => t.transform(&mut image), + TransformerEnum::Crop(t) => t.transform(&mut image), + } + } + + return image; + } + + /// Return the mime this chain will produce when given an image + /// with type `input_mime`. If this returns `None`, the input mime + /// cannot be transformed. + #[inline(always)] + pub fn output_mime(&self, input_mime: &MimeType) -> Option { + let mime = self + .steps + .last() + .and_then(|x| match x { + TransformerEnum::Format { format } => Some(MimeType::from(format.to_mime_type())), + _ => None, + }) + .unwrap_or(input_mime.clone()); + + let fmt = ImageFormat::from_mime_type(mime.to_string()); + fmt.map(|_| mime) + } + + /// Transform `image_bytes` using this chain. + /// Returns `(output_type, output_bytes)`. + /// + /// `image_format` tells us the type of `image_bytes`. + /// If it is `None`, we try to infer it. + pub fn transform_bytes( + &self, + image_bytes: &[u8], + image_format: Option<&MimeType>, + ) -> Result<(MimeType, Vec), TransformBytesError> { + let format: ImageFormat = match image_format { + Some(x) => ImageFormat::from_mime_type(x.to_string()) + .ok_or(TransformBytesError::NotAnImage(x.to_string()))?, + None => image::guess_format(image_bytes)?, + }; + + let out_format = self + .steps + .last() + .and_then(|x| match x { + TransformerEnum::Format { format } => Some(format), + _ => None, + }) + .unwrap_or(&format); + + let img = image::load_from_memory_with_format(image_bytes, format)?; + let img = self.transform_image(img); + + let out_mime = MimeType::from(out_format.to_mime_type()); + let mut out_bytes = Cursor::new(Vec::new()); + img.write_to(&mut out_bytes, *out_format)?; + + return Ok((out_mime, out_bytes.into_inner())); + } +} + +impl FromStr for TransformerChain { + type Err = String; + fn from_str(s: &str) -> Result { + let steps_str = s.split(";"); + + let mut steps = Vec::new(); + for s in steps_str { + let s = s.trim(); + if s.is_empty() { + continue; + } + + let step = s.parse(); + match step { + Ok(x) => steps.push(x), + Err(msg) => return Err(format!("invalid step `{s}`: {msg}")), + } + } + + let n_format = steps + .iter() + .filter(|x| matches!(x, TransformerEnum::Format { .. })) + .count(); + if n_format > 2 { + return Err("provide at most one format()".to_owned()); + } + + if n_format == 1 && !matches!(steps.last(), Some(TransformerEnum::Format { .. })) { + return Err("format() must be last".to_owned()); + } + + return Ok(Self { steps }); + } +} + +impl<'de> Deserialize<'de> for TransformerChain { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + let s = String::deserialize(deserializer)?; + Self::from_str(&s).map_err(de::Error::custom) + } +} + +impl Display for TransformerChain { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + let mut first = true; + for step in &self.steps { + if first { + write!(f, "{step}")?; + first = false + } else { + write!(f, ";{step}")?; + } + } + + return Ok(()); + } +} + +impl PartialEq for TransformerChain { + fn eq(&self, other: &Self) -> bool { + self.to_string() == other.to_string() + } +} + +impl Eq for TransformerChain {} + +impl Hash for TransformerChain { + fn hash(&self, state: &mut H) { + self.to_string().hash(state); + } +} diff --git a/crates/servable/src/transform/mod.rs b/crates/servable/src/transform/mod.rs new file mode 100644 index 0000000..cea3ac0 --- /dev/null +++ b/crates/servable/src/transform/mod.rs @@ -0,0 +1,9 @@ +//! Provides simple server-side image optimization +//! using query parameters. + +mod pixeldim; + +pub mod transformers; + +mod chain; +pub use chain::*; diff --git a/crates/servable/src/transform/pixeldim.rs b/crates/servable/src/transform/pixeldim.rs new file mode 100644 index 0000000..b742c21 --- /dev/null +++ b/crates/servable/src/transform/pixeldim.rs @@ -0,0 +1,68 @@ +use serde::{Deserialize, Deserializer}; +use std::fmt; +use std::str::FromStr; + +// TODO: parse -, + (100vw - 10px) +// TODO: parse 100vw [min] 10 +// TODO: parse 100vw [max] 10 + +#[derive(Debug, Clone, PartialEq)] +pub enum PixelDim { + Pixels(u32), + WidthPercent(f32), + HeightPercent(f32), +} + +impl FromStr for PixelDim { + type Err = String; + + fn from_str(s: &str) -> Result { + let numeric_end = s.find(|c: char| !c.is_ascii_digit() && c != '.'); + + let (quantity, unit) = numeric_end.map(|x| s.split_at(x)).unwrap_or((s, "px")); + let quantity = quantity.trim(); + let unit = unit.trim(); + + match unit { + "vw" => Ok(PixelDim::WidthPercent( + quantity + .parse() + .map_err(|_err| format!("invalid quantity {quantity}"))?, + )), + + "vh" => Ok(PixelDim::HeightPercent( + quantity + .parse() + .map_err(|_err| format!("invalid quantity {quantity}"))?, + )), + + "px" => Ok(PixelDim::Pixels( + quantity + .parse() + .map_err(|_err| format!("invalid quantity {quantity}"))?, + )), + + _ => Err(format!("invalid unit {unit}")), + } + } +} + +impl<'de> Deserialize<'de> for PixelDim { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + let s = String::deserialize(deserializer)?; + FromStr::from_str(&s).map_err(serde::de::Error::custom) + } +} + +impl fmt::Display for PixelDim { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + PixelDim::Pixels(px) => write!(f, "{px}"), + PixelDim::WidthPercent(p) => write!(f, "{p:.2}vw"), + PixelDim::HeightPercent(p) => write!(f, "{p:.2}vh"), + } + } +} diff --git a/crates/servable/src/transform/transformers/crop.rs b/crates/servable/src/transform/transformers/crop.rs new file mode 100644 index 0000000..f517313 --- /dev/null +++ b/crates/servable/src/transform/transformers/crop.rs @@ -0,0 +1,188 @@ +use image::DynamicImage; +use serde::{Deserialize, Serialize}; +use std::{fmt::Display, str::FromStr}; +use strum::{Display, EnumString}; + +use super::super::{pixeldim::PixelDim, transformers::ImageTransformer}; + +#[expect(missing_docs)] +#[derive(Debug, Clone, Copy, PartialEq, Eq, EnumString, Serialize, Deserialize, Display)] +pub enum Direction { + #[serde(rename = "n")] + #[strum(to_string = "n")] + #[strum(serialize = "north")] + North, + + #[serde(rename = "e")] + #[strum(serialize = "e")] + #[strum(serialize = "east")] + East, + + #[serde(rename = "s")] + #[strum(serialize = "s")] + #[strum(serialize = "south")] + South, + + #[serde(rename = "w")] + #[strum(to_string = "w")] + #[strum(serialize = "west")] + West, + + #[serde(rename = "c")] + #[strum(serialize = "c")] + #[strum(serialize = "center")] + Center, + + #[serde(rename = "ne")] + #[strum(serialize = "ne")] + #[strum(serialize = "northeast")] + NorthEast, + + #[serde(rename = "se")] + #[strum(serialize = "se")] + #[strum(serialize = "southeast")] + SouthEast, + + #[serde(rename = "nw")] + #[strum(serialize = "nw")] + #[strum(serialize = "northwest")] + NorthWest, + + #[serde(rename = "sw")] + #[strum(serialize = "sw")] + #[strum(serialize = "southwest")] + SouthWest, +} + +/// Crop an image to (at most) the given size. +/// See [Self::new] for details. +#[derive(Debug, Clone, PartialEq)] +pub struct CropTransformer { + w: PixelDim, + h: PixelDim, + float: Direction, +} + +impl CropTransformer { + /// Create a new [CropTransformer] with the given parameters. + /// + /// A [CropTransformer] creates an image of size `w x h`, but... + /// - does not reduce width if `w` is greater than image width + /// - does not reduce height if `h` is greater than image height + /// - does nothing if `w` or `h` is less than or equal to zero. + pub fn new(w: PixelDim, h: PixelDim, float: Direction) -> Self { + Self { w, h, float } + } + + fn crop_dim(&self, img_width: u32, img_height: u32) -> (u32, u32) { + let crop_width = match self.w { + PixelDim::Pixels(w) => w, + PixelDim::WidthPercent(pct) => ((img_width as f32) * pct / 100.0) as u32, + PixelDim::HeightPercent(pct) => ((img_height as f32) * pct / 100.0) as u32, + }; + + let crop_height = match self.h { + PixelDim::Pixels(h) => h, + PixelDim::WidthPercent(pct) => ((img_width as f32) * pct / 100.0) as u32, + PixelDim::HeightPercent(pct) => ((img_height as f32) * pct / 100.0) as u32, + }; + + (crop_width, crop_height) + } + + #[expect(clippy::integer_division)] + fn crop_pos( + &self, + img_width: u32, + img_height: u32, + crop_width: u32, + crop_height: u32, + ) -> (u32, u32) { + match self.float { + Direction::North => { + let x = (img_width - crop_width) / 2; + let y = 0; + (x, y) + } + Direction::East => { + let x = img_width - crop_width; + let y = (img_height - crop_height) / 2; + (x, y) + } + Direction::South => { + let x = (img_width - crop_width) / 2; + let y = img_height - crop_height; + (x, y) + } + Direction::West => { + let x = 0; + let y = (img_height - crop_height) / 2; + (x, y) + } + Direction::Center => { + let x = (img_width - crop_width) / 2; + let y = (img_height - crop_height) / 2; + (x, y) + } + Direction::NorthEast => { + let x = img_width - crop_width; + let y = 0; + (x, y) + } + Direction::SouthEast => { + let x = img_width - crop_width; + let y = img_height - crop_height; + (x, y) + } + Direction::NorthWest => { + let x = 0; + let y = 0; + (x, y) + } + Direction::SouthWest => { + let x = 0; + let y = img_height - crop_height; + (x, y) + } + } + } +} + +impl Display for CropTransformer { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "crop({},{},{})", self.w, self.h, self.float) + } +} + +impl ImageTransformer for CropTransformer { + fn parse_args(args: &str) -> Result { + let args: Vec<&str> = args.split(",").collect(); + if args.len() != 3 { + return Err(format!("expected 3 args, got {}", args.len())); + } + + let w = args[0].trim().parse::()?; + let h = args[1].trim().parse::()?; + + let direction = args[2].trim(); + let direction = Direction::from_str(direction) + .map_err(|_err| format!("invalid direction {direction}"))?; + + Ok(Self { + w, + h, + float: direction, + }) + } + + fn transform(&self, input: &mut DynamicImage) { + let (img_width, img_height) = (input.width(), input.height()); + let (crop_width, crop_height) = self.crop_dim(img_width, img_height); + + if (crop_width < img_width || crop_height < img_height) && crop_width > 0 && crop_height > 0 + { + let (x, y) = self.crop_pos(img_width, img_height, crop_width, crop_height); + *input = input.crop(x, y, crop_width, crop_height); + } + } +} diff --git a/crates/servable/src/transform/transformers/maxdim.rs b/crates/servable/src/transform/transformers/maxdim.rs new file mode 100644 index 0000000..a207b1f --- /dev/null +++ b/crates/servable/src/transform/transformers/maxdim.rs @@ -0,0 +1,86 @@ +use image::{DynamicImage, imageops::FilterType}; +use std::fmt::Display; + +use super::super::{pixeldim::PixelDim, transformers::ImageTransformer}; + +/// Scale an image until it fits in a configured bounding box. +#[derive(Debug, Clone, PartialEq)] +pub struct MaxDimTransformer { + w: PixelDim, + h: PixelDim, +} + +impl MaxDimTransformer { + /// Create a new [MaxDimTransformer] that scales an image down + /// until it fits in a box of dimension `w x h`. + /// + /// Images are never scaled up. + pub fn new(w: PixelDim, h: PixelDim) -> Self { + Self { w, h } + } + + fn target_dim(&self, img_width: u32, img_height: u32) -> (u32, u32) { + let max_width = match self.w { + PixelDim::Pixels(w) => Some(w), + PixelDim::WidthPercent(pct) => Some(((img_width as f32) * pct / 100.0) as u32), + PixelDim::HeightPercent(_) => None, + }; + + let max_height = match self.h { + PixelDim::Pixels(h) => Some(h), + PixelDim::HeightPercent(pct) => Some(((img_height as f32) * pct / 100.0) as u32), + PixelDim::WidthPercent(_) => None, + }; + + if max_width.map(|x| img_width <= x).unwrap_or(true) + && max_height.map(|x| img_height <= x).unwrap_or(true) + { + return (img_width, img_height); + } + + let width_ratio = max_width + .map(|x| x as f32 / img_width as f32) + .unwrap_or(1.0); + + let height_ratio = max_height + .map(|x| x as f32 / img_height as f32) + .unwrap_or(1.0); + + let ratio = width_ratio.min(height_ratio); + + ( + (img_width as f32 * ratio) as u32, + (img_height as f32 * ratio) as u32, + ) + } +} + +impl Display for MaxDimTransformer { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "maxdim({},{})", self.w, self.h) + } +} + +impl ImageTransformer for MaxDimTransformer { + fn parse_args(args: &str) -> Result { + let args: Vec<&str> = args.split(",").collect(); + if args.len() != 2 { + return Err(format!("expected 2 args, got {}", args.len())); + } + + let w = args[0].parse::()?; + let h = args[1].parse::()?; + + Ok(Self { w, h }) + } + + fn transform(&self, input: &mut DynamicImage) { + let (img_width, img_height) = (input.width(), input.height()); + let (target_width, target_height) = self.target_dim(img_width, img_height); + + // Only resize if needed + if target_width != img_width || target_height != img_height { + *input = input.resize(target_width, target_height, FilterType::Lanczos3); + } + } +} diff --git a/crates/servable/src/transform/transformers/mod.rs b/crates/servable/src/transform/transformers/mod.rs new file mode 100644 index 0000000..a777f5b --- /dev/null +++ b/crates/servable/src/transform/transformers/mod.rs @@ -0,0 +1,171 @@ +//! Defines all transformation steps we can apply to an image + +use image::{DynamicImage, ImageFormat}; +use std::fmt; +use std::fmt::{Debug, Display}; +use std::str::FromStr; + +mod crop; +pub use crop::*; + +mod maxdim; +pub use maxdim::*; + +/// A single transformation that may be applied to an image. +pub trait ImageTransformer +where + Self: PartialEq, + Self: Sized + Clone, + Self: Display + Debug, +{ + /// Transform the given image in place + fn transform(&self, input: &mut DynamicImage); + + /// Parse an arg string. + /// + /// `name({arg_string})` + fn parse_args(args: &str) -> Result; +} + +use serde::{Deserialize, Deserializer}; + +/// An enum of all [`ImageTransformer`]s +#[derive(Debug, Clone, PartialEq)] +pub enum TransformerEnum { + /// Usage: `maxdim(w, h)` + /// + /// Scale the image so its width is smaller than `w` + /// and its height is smaller than `h`. Aspect ratio is preserved. + /// + /// To only limit the size of one dimension, use `vw` or `vh`. + /// For example, `maxdim(50,100vh)` will not limit width. + MaxDim(MaxDimTransformer), + + /// Usage: `crop(w, h, float)` + /// + /// Crop the image to at most `w` by `h` pixels, + /// floating the crop area in the specified direction. + /// + /// Directions are one of: + /// - Cardinal: n,e,s,w + /// - Diagonal: ne,nw,se,sw, + /// - Centered: c + /// + /// Examples: + /// - `crop(100vw, 50)` gets the top 50 pixels of the image \ + /// (or fewer, if the image's height is smaller than 50) + /// + /// To only limit the size of one dimension, use `vw` or `vh`. + /// For example, `maxdim(50,100vh)` will not limit width. + Crop(CropTransformer), + + /// Usage: `format(format)` + /// + /// Transcode the image to the given format. + /// This step must be last, and cannot be provided + /// more than once. + /// + /// Valid formats: + /// - bmp + /// - gif + /// - ico + /// - jpeg or jpg + /// - png + /// - qoi + /// - webp + /// + /// Example: + /// - `format(png)` + /// + /// When transcoding an animated gif, the first frame is taken + /// and all others are thrown away. This happens even if we + /// transcode from a gif to a gif. + Format { + /// The format to produce + format: ImageFormat, + }, +} + +impl FromStr for TransformerEnum { + type Err = String; + + fn from_str(s: &str) -> Result { + let s = s.trim(); + + let (name, args) = { + let name_len = match s.find('(') { + Some(x) => x + 1, + None => { + return Err(format!( + "invalid transformation {s}. Must look like name(args)." + )); + } + }; + + let mut balance = 1; + let mut end = name_len; + for i in s[name_len..].bytes() { + match i { + b')' => balance -= 1, + b'(' => balance += 1, + _ => {} + } + + if balance == 0 { + break; + } + + end += 1; + } + + if balance != 0 { + return Err(format!("mismatched parenthesis in {s}")); + } + + let name = s[0..name_len - 1].trim(); + let args = s[name_len..end].trim(); + let trail = s[end + 1..].trim(); + if !trail.is_empty() { + return Err(format!( + "invalid transformation {s}. Must look like name(args)." + )); + } + + (name, args) + }; + + match name { + "maxdim" => Ok(Self::MaxDim(MaxDimTransformer::parse_args(args)?)), + "crop" => Ok(Self::Crop(CropTransformer::parse_args(args)?)), + + "format" => Ok(TransformerEnum::Format { + format: ImageFormat::from_extension(args) + .ok_or(format!("invalid image format {args}"))?, + }), + + _ => Err(format!("unknown transformation {name}")), + } + } +} + +impl<'de> Deserialize<'de> for TransformerEnum { + fn deserialize(deserializer: D) -> Result + where + D: Deserializer<'de>, + { + let s = String::deserialize(deserializer)?; + s.parse().map_err(serde::de::Error::custom) + } +} + +impl Display for TransformerEnum { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + TransformerEnum::MaxDim(x) => Display::fmt(x, f), + TransformerEnum::Crop(x) => Display::fmt(x, f), + TransformerEnum::Format { format } => { + write!(f, "format({})", format.extensions_str()[0]) + } + } + } +} diff --git a/crates/servable/src/types.rs b/crates/servable/src/types.rs new file mode 100644 index 0000000..c4231a6 --- /dev/null +++ b/crates/servable/src/types.rs @@ -0,0 +1,148 @@ +use axum::http::{HeaderMap, StatusCode}; +use chrono::TimeDelta; +use std::collections::BTreeMap; + +use crate::mime::MimeType; + +// +// MARK: rendered +// + +/// The contents of a response +/// produced by a [crate::servable::Servable] +#[derive(Clone)] +pub enum RenderedBody { + /// Static raw bytes + Static(&'static [u8]), + + /// Dynamic raw bytes + Bytes(Vec), + + /// A UTF-8 string + String(String), + + /// No body. Equivalent to `Self::Static(&[])`. + Empty, +} + +trait RenderedBodyTypeSealed {} +impl RenderedBodyTypeSealed for () {} +impl RenderedBodyTypeSealed for RenderedBody {} + +/// A utility trait, used to control the +/// kind of body [Rendered] contains. +/// +/// This trait is only implemented by two types: +/// - `()`, when a request must return an empty body (i.e, HEAD) +/// - [RenderedBody], when a request should return a full response (i.e, GET) +#[expect(private_bounds)] +pub trait RenderedBodyType: RenderedBodyTypeSealed {} +impl RenderedBodyType for T {} + +/// An asset to return from an http route +#[derive(Clone)] +pub struct Rendered { + /// The code to return + pub code: StatusCode, + + /// The headers to return + pub headers: HeaderMap, + + /// The content to return + pub body: T, + + /// The type of `self.body` + pub mime: Option, + + /// How long to cache this response. + /// If none, don't cache. + pub ttl: Option, + + /// If true, the data at this route will never change. + pub immutable: bool, +} + +impl Rendered<()> { + /// Turn this [Rendered] into a [Rendered] with a body. + pub fn with_body(self, body: RenderedBody) -> Rendered { + Rendered { + code: self.code, + headers: self.headers, + body, + mime: self.mime, + ttl: self.ttl, + immutable: self.immutable, + } + } +} + +/// Additional context available to [crate::servable::Servable]s +/// when generating their content +#[derive(Debug, Clone, PartialEq, Eq, Hash)] +pub struct RenderContext { + /// Information about the request + pub client_info: ClientInfo, + + /// The route that was requested. + /// Starts with a /. + pub route: String, + + /// This request's query parameters + pub query: BTreeMap, +} + +/// The type of device that requested a page +#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] +pub enum DeviceType { + /// This is a mobile device, like a phone. + Mobile, + + /// This is a device with a large screen + /// and a mouse, like a laptop. + Desktop, +} + +impl Default for DeviceType { + fn default() -> Self { + Self::Desktop + } +} + +/// Inferred information about the client +/// that requested a certain route. +#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] +pub struct ClientInfo { + /// The type of device that is viewing this page. + /// + /// We do our best to detect this value automatically, + /// but we may be wrong. + pub device_type: DeviceType, +} + +impl ClientInfo { + pub(crate) fn from_headers(headers: &HeaderMap) -> Self { + let ua = headers + .get("user-agent") + .and_then(|x| x.to_str().ok()) + .unwrap_or(""); + + let ch_mobile = headers + .get("Sec-CH-UA-Mobile") + .and_then(|x| x.to_str().ok()) + .unwrap_or(""); + + let mut device_type = None; + + if device_type.is_none() && ch_mobile.contains("1") { + device_type = Some(DeviceType::Mobile); + } + + if device_type.is_none() && ua.contains("Mobile") { + device_type = Some(DeviceType::Mobile); + } + + Self { + device_type: device_type.unwrap_or_default(), + } + } +}