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b/Cargo.toml new file mode 100644 index 0000000..162a5ab --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,18 @@ +[package] +name = "paste-eater" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +toml = "0.8.4" +serde = "1.0.189" +serde_derive = "1.0.189" +directories = "5.0.1" +clap = { version = "4.4.7", features = ["derive"] } +rocket = { version = "0.5.0-rc.3", features = ["tls", "json"] } +rand = "0.8.5" +chrono = "0.4.31" +lz4_flex = "0.11.1" + diff --git a/resources/Rocket.toml b/resources/Rocket.toml new file mode 100644 index 0000000..dd510df --- /dev/null +++ b/resources/Rocket.toml @@ -0,0 +1,28 @@ +[default] +address = "127.0.0.1" +port = 8000 +workers = 16 +max_blocking = 512 +keep_alive = 5 +ident = "Rocket" +ip_header = "X-Real-IP" # set to `false` to disable +log_level = "normal" +temp_dir = "/tmp" +cli_colors = true +secret_key = "" + +[default.limits] +form = "64 kB" +json = "1 MiB" +msgpack = "2 MiB" +"file/jpg" = "5 MiB" + +[default.tls] +certs = "path/to/cert-chain.pem" +key = "path/to/key.pem" + +[default.shutdown] +ctrlc = true +signals = ["term", "hup"] +grace = 5 +mercy = 5 \ No newline at end of file diff --git a/src/args.rs b/src/args.rs new file mode 100644 index 0000000..3d0e8f1 --- /dev/null +++ b/src/args.rs @@ -0,0 +1,25 @@ +use clap::Parser; + +#[derive(Parser, Debug)] +#[command(author, version, about, long_about = None)] +#[command(next_line_help = true)] +pub struct Args { + /// Where to store the pastes. By default this is a "data" sub-directory within the system-specific configuration directory for the application ( see https://github.com/dirs-dev/directories-rs#basedirs" ). + #[arg(short, long)] + pub location: Option, + + /// Max size of a single paste + #[arg(short = 'f', long, default_value_t = 10000000)] + pub max_file_size: u64, + + // /// Max size of all pastes existing on the server. Once this limit is reached, pastes will be deleted, starting with oldest first. + // #[arg(short = 's', long, default_value_t = 100000000)] + // pub max_storage_size: u64, + + /// Constant size of new paste identifiers being generated. Changing this does not alter existing pastes. + #[arg(short, long, default_value_t = 12)] + pub name_size: usize, + + #[arg(short, long, default_value_t = true)] + pub compress: bool +} \ No newline at end of file diff --git a/src/config.rs b/src/config.rs new file mode 100644 index 0000000..ca29201 --- /dev/null +++ b/src/config.rs @@ -0,0 +1,177 @@ +use std::{path::{Path, PathBuf}, fs::File, io::Write}; + +use directories::ProjectDirs; +use serde_derive::{Deserialize, Serialize}; + +use crate::{args::Args, error::PasteEaterError}; + +const PASTE_EATER_CONFIG_FILE: &str = "config.toml"; +const PASTE_EATER_QUALIFIER: &str = "dev.mvvasilev"; +const PASTE_EATER_ORGANIZATION: &str = "mvvasilev"; +const PASTE_EATER_APPLICATION: &str = "paste-eater"; + +type ConfigurationError = PasteEaterError; + +#[derive(Default, Debug, Clone, Serialize, Deserialize)] +pub struct PasteEaterConfig { + /// Where to store the pastes + #[serde(default = "default_files_location")] + pub files_location: String, + + /// Max size of a single paste + #[serde(default = "default_files_max_single_file_size_in_bytes")] + pub files_max_single_file_size_in_bytes: u64, + + // /// Max size of all pastes existing on the server. Once this limit is reached, pastes will be deleted, starting with oldest first. + // #[serde(default = "default_files_max_total_file_size_in_bytes")] + // pub files_max_total_file_size_in_bytes: u64, + + /// Constant size of new paste identifiers being generated. Changing this should not alter existing pastes. + #[serde(default = "default_name_size")] + pub name_size: usize, + + #[serde(default = "default_compress")] + pub compress: bool + + // TODO: Encrypted pastes? +} + +fn default_files_location() -> String { + if let Some(config_dirs) = ProjectDirs::from(PASTE_EATER_QUALIFIER, PASTE_EATER_ORGANIZATION, PASTE_EATER_APPLICATION) { + let mut dir = config_dirs.config_dir().to_path_buf(); + + dir.push(Path::new("data")); + + dir.display().to_string() + } else { + Path::new(".").to_path_buf().display().to_string() + } +} + +fn default_files_max_single_file_size_in_bytes() -> u64 { + 10_000_000 +} + +fn default_files_max_total_file_size_in_bytes() -> u64 { + 100_000_000 +} + +fn default_name_size() -> usize { + 12 +} + +fn default_compress() -> bool { + true +} + +pub struct ConfigurationHandler { + config_path: PathBuf +} + +impl ConfigurationHandler { + pub fn new() -> Result { + if let Some(config_dirs) = ProjectDirs::from(PASTE_EATER_QUALIFIER, PASTE_EATER_ORGANIZATION, PASTE_EATER_APPLICATION) { + ConfigurationHandler::new_with_path(config_dirs.config_dir()) + } else { + Err(ConfigurationError::new("Unable to determine configuration path")) + } + } + + pub fn new_with_args(args: &Args) -> Result { + let config = PasteEaterConfig { + files_location: args.location.clone().unwrap_or(default_files_location()), + files_max_single_file_size_in_bytes: args.max_file_size, + // files_max_total_file_size_in_bytes: args.max_storage_size, + name_size: args.name_size, + compress: args.compress + }; + + + + if let Some(config_dirs) = ProjectDirs::from(PASTE_EATER_QUALIFIER, PASTE_EATER_ORGANIZATION, PASTE_EATER_APPLICATION) { + ConfigurationHandler::new_with_defaults(config_dirs.config_dir(), &config) + } else { + Err(ConfigurationError::new("Unable to determine configuration path")) + } + } + + pub fn new_with_path(path: &Path) -> Result { + ConfigurationHandler::new_with_defaults(path, &PasteEaterConfig { + files_location: default_files_location(), + files_max_single_file_size_in_bytes: default_files_max_single_file_size_in_bytes(), + // files_max_total_file_size_in_bytes: default_files_max_total_file_size_in_bytes(), + name_size: default_name_size(), + compress: default_compress() + }) + } + + pub fn new_with_defaults(path: &Path, default_config: &PasteEaterConfig) -> Result { + if path.extension().is_some() { + return Err(ConfigurationError::new(&format!("Provided configuration path '{}' is not a directory.", path.display()))); + } + + let mut pathbuf = path.to_path_buf(); + + match pathbuf.try_exists() { + Ok(exists) => { + if !exists { + match std::fs::create_dir_all(&pathbuf) { + Ok(_) => {}, + Err(internal) => return Err(ConfigurationError::new_internal(&format!("Failed to create configuration directory '{}'.", path.display()), Box::new(internal))), + } + } + }, + Err(err) => return Err(ConfigurationError::new_internal(&format!("Failed to check if configuration directory '{}' exists.", path.display()), Box::new(err))), + } + + pathbuf.push(Path::new(PASTE_EATER_CONFIG_FILE)); + + if !pathbuf.exists() { + match File::create(&pathbuf) { + Ok(mut f) => { + + let config = PasteEaterConfig { + files_location: if default_config.files_location.is_empty() { default_files_location() } else { default_config.files_location.clone() }, + files_max_single_file_size_in_bytes: default_config.files_max_single_file_size_in_bytes, + // files_max_total_file_size_in_bytes: default_config.files_max_total_file_size_in_bytes, + name_size: default_config.name_size, + compress: default_config.compress + }; + + let serialized_default_config = toml::to_string_pretty(&config); + + let write_default_config = match serialized_default_config { + Ok(ser) => f.write_all(ser.as_bytes()), + Err(err) => return Err(ConfigurationError::new_internal("Failed to create default configuration.", Box::new(err))), + }; + + match write_default_config { + Ok(_) => {}, + Err(err) => return Err(ConfigurationError::new_internal("Failed to create default configuration.", Box::new(err))), + } + }, + Err(err) => return Err(ConfigurationError::new_internal(&format!("Failed to create configuration file '{}'", path.display()), Box::new(err))), + } + } + + Ok(Self { + config_path: pathbuf + }) + } + + pub fn fetch_config(&self) -> Result { + let config_as_string = std::fs::read_to_string(&self.config_path); + + let config: PasteEaterConfig = match config_as_string { + Ok(s) => { + match toml::from_str(&s) { + Ok(config) => config, + Err(err) => return Err(ConfigurationError::new_internal(&format!("Failed to parse configuration file '{}'", self.config_path.display()), Box::new(err))), + } + }, + Err(err) => return Err(ConfigurationError::new_internal(&format!("Failed to read configuration file '{}'", self.config_path.display()), Box::new(err))), + }; + + Ok(config) + } +} \ No newline at end of file diff --git a/src/error.rs b/src/error.rs new file mode 100644 index 0000000..1a5a421 --- /dev/null +++ b/src/error.rs @@ -0,0 +1,37 @@ +use std::{error::Error, fmt::Display}; + +#[derive(Debug)] +pub struct PasteEaterError { + internal_error: Option>, + message: String +} + +impl PasteEaterError { + pub fn new(message: &str) -> Self { + Self { + message: message.to_string(), + internal_error: None + } + } + + pub fn new_internal(message: &str, internal: Box) -> Self { + Self { + message: message.to_string(), + internal_error: Some(internal) + } + } +} + +impl Display for PasteEaterError { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!( + f, + "Paste eater error: {}, internal: {}", + self.message, + self.internal_error.as_ref().map_or("".to_string(), |e| format!("{}", e)) + ) + } +} + +impl Error for PasteEaterError { +} \ No newline at end of file diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..12d9d9d --- /dev/null +++ b/src/main.rs @@ -0,0 +1,12 @@ +mod server; +mod config; +mod args; +mod paste; +mod error; + +#[rocket::main] +async fn main() -> Result<(), rocket::Error> { + server::app::start_paste_eater().await?; + + Ok(()) +} \ No newline at end of file diff --git a/src/paste.rs b/src/paste.rs new file mode 100644 index 0000000..7ff9098 --- /dev/null +++ b/src/paste.rs @@ -0,0 +1,221 @@ +use std::{path::{Path, PathBuf}, fs::File}; + +use chrono::{DateTime, Local}; +use lz4_flex::{compress_prepend_size, decompress_size_prepended}; +use rand::{Rng, distributions::Alphanumeric}; +use serde_derive::{Serialize, Deserialize}; + +use crate::{config::ConfigurationHandler, error::PasteEaterError}; + +type PasteError = PasteEaterError; + +type PasteUID = String; + +#[repr(u8)] +#[derive(Debug, Clone, Serialize, Deserialize)] +pub enum PasteLanguage { + None = 0u8, + CSharp = 1u8, + Java = 2u8, + CPlusPlus = 3u8, + C = 4u8, + Python = 5u8, + Rust = 6u8, + Go = 7u8, +} + +fn convert_u8_to_language(val: u8) -> PasteLanguage { + match val { + 0u8 => PasteLanguage::None, + 1u8 => PasteLanguage::CSharp, + 2u8 => PasteLanguage::Java, + 3u8 => PasteLanguage::CPlusPlus, + 4u8 => PasteLanguage::C, + 5u8 => PasteLanguage::Python, + 6u8 => PasteLanguage::Rust, + 7u8 => PasteLanguage::Go, + _ => PasteLanguage::None + } +} + +#[derive(Debug, Clone, Serialize, Deserialize)] +pub struct PasteOutput { + pub encrypted: bool, + pub created: String, + pub last_accessed: String, + pub language: PasteLanguage, + pub data: String +} + +pub struct PasteHandler { + config_handler: ConfigurationHandler, + // storage_size_cache: u64, TODO: Optimize storage size tracking + +} + +impl PasteHandler { + pub fn new(config_handler: ConfigurationHandler) -> Self { + Self { + config_handler, + // storage_size_cache: 0 + } + } + + pub fn create_new_paste(&self, encrypt: bool, language: &PasteLanguage, paste_data: &String) -> Result { + let config = self.config_handler.fetch_config()?; + + let data_path = Path::new(&config.files_location); + + match data_path.try_exists() { + Ok(exists) => { + if !exists { + match std::fs::create_dir_all(data_path) { + Ok(_) => {}, + Err(internal) => return Err(PasteError::new_internal(&format!("Failed to create data directory '{}'.", data_path.display()), Box::new(internal))), + } + } + }, + Err(err) => return Err(PasteError::new_internal(&format!("Failed to check if data directory '{}' exists.", data_path.display()), Box::new(err))), + } + + // TODO: Encrypt (?) + + if paste_data.len() as u64 > config.files_max_single_file_size_in_bytes { + return Err(PasteError::new("Uploaded paste is larger than maximum allowed size.")); + } + + + // TODO: Enforce max size for single file and max total sizes. Note: scrapped for now. + // if self.determine_current_storage_size() + paste_data.len() as u64 > config.files_max_total_file_size_in_bytes { + // if let Err(e) = std::fs::remove_file(self.find_oldest_paste_larger_than(paste_data.len() as u64)) { + // return Err(PasteError::new_internal("Unable to save paste, overloads capacity and no additional storage could be acquired.", Box::new(e))); + // } + // } + + let (file_path, uid) = self.create_new_paste_file(Path::new(&config.files_location), config.name_size)?; + + // paste file format: + // 0: is encrypted | is compressed | unused | unused | unused | unused | unused | unused + // 1: language byte + // 2-end: data bytes + + let mut file_data: Vec = Vec::new(); + + let mut flags = 0b0000_0000; + + if encrypt { + flags |= 0b1000_0000; + } + + if config.compress { + flags |= 0b0100_0000; + } + + file_data.push(flags); + file_data.push(language.to_owned() as u8); + + if config.compress { + file_data.extend(compress_prepend_size(paste_data.as_bytes())); + } + + match std::fs::write(&file_path, file_data) { + Ok(_) => Ok(uid), + Err(e) => Err(PasteError::new_internal(&format!("Failed to write paste file '{}'.", file_path.display()), Box::new(e))), + } + } + + // fn determine_current_storage_size(&self) -> u64 { + // 0 + // } + + // fn find_oldest_paste_larger_than(&self, size: u64) -> PathBuf { + // Path::new(".").to_path_buf() + // } + + fn create_new_paste_file(&self, directory: &Path, name_size: usize) -> Result<(PathBuf, PasteUID), PasteError> { + let mut uid: String; + let mut file_path; + + loop { + uid = rand::thread_rng() + .sample_iter(&Alphanumeric) + .take(name_size) + .map(char::from) + .collect(); + + file_path = directory.to_path_buf(); + + file_path.push(Path::new(&format!("{}.paste", uid))); + + if !file_path.exists() { + break; + } + } + + match File::create(&file_path) { + Ok(_) => Ok((file_path, uid)), + Err(e) => Err(PasteError::new_internal(&format!("Failed to create paste file '{}'.", file_path.display()), Box::new(e))), + } + } + + pub fn fetch_raw_paste(&self, uid: PasteUID) -> Result { + let config = self.config_handler.fetch_config()?; + + let mut file_path = Path::new(&config.files_location).to_path_buf(); + + file_path.push(Path::new(&format!("{}.paste", uid))); + + if !file_path.exists() { + return Err(PasteError::new(&format!("Requested paste '{}' does not exist.", uid))); + } + + let file_bytes = match std::fs::read(&file_path) { + Ok(bytes) => bytes, + Err(e) => return Err(PasteError::new_internal(&format!("Failed to read paste '{}'.", uid), Box::new(e))), + }; + + let flags = file_bytes[0]; + + let encrypted = 0b1000_0000 & flags != 0; + let compressed = 0b0100_0000 & flags != 0; + + let language = convert_u8_to_language(file_bytes[1]); + + let bytes = if compressed { + match decompress_size_prepended(&file_bytes[2..]) { + Ok(d) => d, + Err(e) => return Err(PasteError::new_internal(&format!("Failed to decompress paste '{}'.", uid), Box::new(e))), + } + } else { + file_bytes[2..].to_vec() + }; + + let data = match String::from_utf8(bytes) { + Ok(d) => d, + Err(e) => return Err(PasteError::new_internal(&format!("Failed to parse paste '{}'.", uid), Box::new(e))), + }; + + let mut paste = PasteOutput { + encrypted, + last_accessed: DateTime::UNIX_EPOCH.to_rfc2822(), + created: DateTime::UNIX_EPOCH.to_rfc2822(), + language, + data + }; + + if let Ok(metadata) = std::fs::metadata(file_path) { + paste.created = match metadata.created() { + Ok(created) => DateTime::::from(created).to_rfc2822(), + Err(_) => paste.created, + }; + + paste.last_accessed = match metadata.accessed() { + Ok(accessed) => DateTime::::from(accessed).to_rfc2822(), + Err(_) => paste.last_accessed, + }; + } + + Ok(paste) + } +} + diff --git a/src/server/app.rs b/src/server/app.rs new file mode 100644 index 0000000..6bfd733 --- /dev/null +++ b/src/server/app.rs @@ -0,0 +1,29 @@ +use clap::Parser; +use rocket::routes; + +use crate::{server::endpoints, args::Args, config::ConfigurationHandler, paste::PasteHandler, error::PasteEaterError}; + +pub async fn start_paste_eater() -> Result<(), rocket::Error> { + let paste_handler = match create_paste_handler() { + Ok(ph) => ph, + Err(e) => { + panic!("{}", e); + }, + }; + + let _rocket = rocket::build() + .manage(paste_handler) + .mount("/api", routes![endpoints::create_paste, endpoints::get_paste]) + .launch() + .await?; + + Ok(()) +} + +fn create_paste_handler() -> Result { + let args = Args::parse(); + + let config_handler = ConfigurationHandler::new_with_args(&args)?; + + Ok(PasteHandler::new(config_handler)) +} \ No newline at end of file diff --git a/src/server/endpoints.rs b/src/server/endpoints.rs new file mode 100644 index 0000000..1c4e863 --- /dev/null +++ b/src/server/endpoints.rs @@ -0,0 +1,33 @@ +use rocket::{post, get, response::status::Custom, http::Status, State, serde::json::Json}; +use serde_derive::{Serialize, Deserialize}; + +use crate::paste::{PasteHandler, PasteOutput, PasteLanguage}; + +#[derive(Serialize, Deserialize)] +pub struct PasteInput { + encrypted: bool, + language: PasteLanguage, + data: String +} + +#[post("/paste", data = "")] +pub fn create_paste(paste: Json, paste_handler: &State) -> Custom { + match paste_handler.create_new_paste(paste.encrypted, &paste.language, &paste.data) { + Ok(uid) => Custom(Status::Ok, uid), + Err(e) => Custom(Status::InternalServerError, format!("{}", e)), + } +} + +#[derive(Serialize, Deserialize)] +pub struct PasteResponse { + pub paste: Option, + pub error: Option +} + +#[get("/paste/")] +pub fn get_paste(uid: String, paste_handler: &State) -> Custom> { + match paste_handler.fetch_raw_paste(uid) { + Ok(paste) => Custom(Status::Ok, Json(PasteResponse { paste: Some(paste), error: None })), + Err(e) => Custom(Status::InternalServerError, Json(PasteResponse { paste: None, error: Some(format!("{}", e)) })), + } +} \ No newline at end of file diff --git a/src/server/mod.rs b/src/server/mod.rs new file mode 100644 index 0000000..84d6ff7 --- /dev/null +++ b/src/server/mod.rs @@ -0,0 +1,3 @@ +mod endpoints; + +pub mod app; \ No newline at end of file