mirror of
https://github.com/denoland/deno.git
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300 lines
9.3 KiB
Rust
300 lines
9.3 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use crate::colors;
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use crate::file_fetcher::get_source_from_data_url;
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use crate::flags::Flags;
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use crate::ops;
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use crate::proc_state::ProcState;
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use crate::version;
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use deno_core::error::anyhow;
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use deno_core::error::type_error;
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use deno_core::error::AnyError;
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use deno_core::error::Context;
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use deno_core::futures::FutureExt;
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use deno_core::located_script_name;
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use deno_core::resolve_url;
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use deno_core::serde::Deserialize;
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use deno_core::serde::Serialize;
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use deno_core::serde_json;
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use deno_core::url::Url;
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use deno_core::v8_set_flags;
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use deno_core::ModuleLoader;
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use deno_core::ModuleSpecifier;
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use deno_runtime::deno_broadcast_channel::InMemoryBroadcastChannel;
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use deno_runtime::deno_web::BlobStore;
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use deno_runtime::permissions::Permissions;
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use deno_runtime::permissions::PermissionsOptions;
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use deno_runtime::worker::MainWorker;
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use deno_runtime::worker::WorkerOptions;
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use deno_runtime::BootstrapOptions;
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use deno_tls::create_default_root_cert_store;
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use log::Level;
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use std::convert::TryInto;
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use std::env::current_exe;
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use std::fs::File;
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use std::io::BufReader;
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use std::io::Cursor;
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use std::io::Read;
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use std::io::Seek;
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use std::io::SeekFrom;
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use std::iter::once;
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use std::pin::Pin;
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use std::rc::Rc;
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use std::sync::Arc;
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#[derive(Deserialize, Serialize)]
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pub struct Metadata {
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pub argv: Vec<String>,
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pub unstable: bool,
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pub seed: Option<u64>,
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pub permissions: PermissionsOptions,
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pub location: Option<Url>,
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pub v8_flags: Vec<String>,
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pub log_level: Option<Level>,
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pub ca_stores: Option<Vec<String>>,
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pub ca_data: Option<Vec<u8>>,
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pub unsafely_ignore_certificate_errors: Option<Vec<String>>,
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}
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pub const MAGIC_TRAILER: &[u8; 8] = b"d3n0l4nd";
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/// This function will try to run this binary as a standalone binary
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/// produced by `deno compile`. It determines if this is a standalone
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/// binary by checking for the magic trailer string `D3N0` at EOF-12.
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/// The magic trailer is followed by:
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/// - a u64 pointer to the JS bundle embedded in the binary
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/// - a u64 pointer to JSON metadata (serialized flags) embedded in the binary
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/// These are dereferenced, and the bundle is executed under the configuration
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/// specified by the metadata. If no magic trailer is present, this function
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/// exits with `Ok(None)`.
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pub fn extract_standalone(
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args: Vec<String>,
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) -> Result<Option<(Metadata, String)>, AnyError> {
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let current_exe_path = current_exe()?;
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let mut current_exe = File::open(current_exe_path)?;
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let trailer_pos = current_exe.seek(SeekFrom::End(-24))?;
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let mut trailer = [0; 24];
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current_exe.read_exact(&mut trailer)?;
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let (magic_trailer, rest) = trailer.split_at(8);
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if magic_trailer != MAGIC_TRAILER {
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return Ok(None);
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}
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let (bundle_pos, rest) = rest.split_at(8);
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let metadata_pos = rest;
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let bundle_pos = u64_from_bytes(bundle_pos)?;
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let metadata_pos = u64_from_bytes(metadata_pos)?;
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let bundle_len = metadata_pos - bundle_pos;
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let metadata_len = trailer_pos - metadata_pos;
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current_exe.seek(SeekFrom::Start(bundle_pos))?;
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let bundle = read_string_slice(&mut current_exe, bundle_pos, bundle_len)
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.context("Failed to read source bundle from the current executable")?;
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let metadata =
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read_string_slice(&mut current_exe, metadata_pos, metadata_len)
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.context("Failed to read metadata from the current executable")?;
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let mut metadata: Metadata = serde_json::from_str(&metadata).unwrap();
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metadata.argv.append(&mut args[1..].to_vec());
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Ok(Some((metadata, bundle)))
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}
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fn u64_from_bytes(arr: &[u8]) -> Result<u64, AnyError> {
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let fixed_arr: &[u8; 8] = arr
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.try_into()
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.context("Failed to convert the buffer into a fixed-size array")?;
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Ok(u64::from_be_bytes(*fixed_arr))
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}
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fn read_string_slice(
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file: &mut File,
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pos: u64,
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len: u64,
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) -> Result<String, AnyError> {
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let mut string = String::new();
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file.seek(SeekFrom::Start(pos))?;
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file.take(len).read_to_string(&mut string)?;
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// TODO: check amount of bytes read
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Ok(string)
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}
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const SPECIFIER: &str = "file://$deno$/bundle.js";
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struct EmbeddedModuleLoader(String);
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impl ModuleLoader for EmbeddedModuleLoader {
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fn resolve(
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&self,
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specifier: &str,
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_referrer: &str,
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_is_main: bool,
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) -> Result<ModuleSpecifier, AnyError> {
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if let Ok(module_specifier) = resolve_url(specifier) {
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if get_source_from_data_url(&module_specifier).is_ok()
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|| specifier == SPECIFIER
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{
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return Ok(module_specifier);
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}
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}
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Err(type_error(
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"Self-contained binaries don't support module loading",
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))
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}
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fn load(
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&self,
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module_specifier: &ModuleSpecifier,
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_maybe_referrer: Option<ModuleSpecifier>,
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_is_dynamic: bool,
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) -> Pin<Box<deno_core::ModuleSourceFuture>> {
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let module_specifier = module_specifier.clone();
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let is_data_uri = get_source_from_data_url(&module_specifier).ok();
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let code = if let Some((ref source, _)) = is_data_uri {
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source.to_string()
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} else {
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self.0.to_string()
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};
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async move {
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if is_data_uri.is_none() && module_specifier.to_string() != SPECIFIER {
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return Err(type_error(
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"Self-contained binaries don't support module loading",
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));
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}
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Ok(deno_core::ModuleSource {
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code,
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module_url_specified: module_specifier.to_string(),
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module_url_found: module_specifier.to_string(),
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})
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}
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.boxed_local()
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}
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}
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fn metadata_to_flags(metadata: &Metadata) -> Flags {
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let permissions = metadata.permissions.clone();
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Flags {
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argv: metadata.argv.clone(),
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unstable: metadata.unstable,
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seed: metadata.seed,
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location: metadata.location.clone(),
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allow_env: permissions.allow_env,
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allow_hrtime: permissions.allow_hrtime,
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allow_net: permissions.allow_net,
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allow_ffi: permissions.allow_ffi,
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allow_read: permissions.allow_read,
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allow_run: permissions.allow_run,
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allow_write: permissions.allow_write,
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v8_flags: metadata.v8_flags.clone(),
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log_level: metadata.log_level,
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ca_stores: metadata.ca_stores.clone(),
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..Default::default()
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}
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}
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pub async fn run(
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source_code: String,
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metadata: Metadata,
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) -> Result<(), AnyError> {
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let flags = metadata_to_flags(&metadata);
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let main_module = resolve_url(SPECIFIER)?;
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let ps = ProcState::build(flags).await?;
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let permissions = Permissions::from_options(&metadata.permissions);
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let blob_store = BlobStore::default();
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let broadcast_channel = InMemoryBroadcastChannel::default();
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let module_loader = Rc::new(EmbeddedModuleLoader(source_code));
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let create_web_worker_cb = Arc::new(|_| {
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todo!("Worker are currently not supported in standalone binaries");
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});
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// Keep in sync with `main.rs`.
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v8_set_flags(
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once("UNUSED_BUT_NECESSARY_ARG0".to_owned())
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.chain(metadata.v8_flags.iter().cloned())
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.collect::<Vec<_>>(),
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);
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let mut root_cert_store = ps
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.root_cert_store
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.clone()
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.unwrap_or_else(create_default_root_cert_store);
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if let Some(cert) = metadata.ca_data {
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let reader = &mut BufReader::new(Cursor::new(cert));
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// This function does not return specific errors, if it fails give a generic message.
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if let Err(_err) = root_cert_store.add_pem_file(reader) {
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return Err(anyhow!("Unable to add pem file to certificate store"));
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}
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}
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let options = WorkerOptions {
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bootstrap: BootstrapOptions {
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apply_source_maps: false,
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args: metadata.argv,
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cpu_count: num_cpus::get(),
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debug_flag: metadata.log_level.map_or(false, |l| l == log::Level::Debug),
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enable_testing_features: false,
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location: metadata.location,
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no_color: !colors::use_color(),
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runtime_version: version::deno(),
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ts_version: version::TYPESCRIPT.to_string(),
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unstable: metadata.unstable,
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},
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user_agent: version::get_user_agent(),
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unsafely_ignore_certificate_errors: metadata
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.unsafely_ignore_certificate_errors,
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root_cert_store: Some(root_cert_store),
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seed: metadata.seed,
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js_error_create_fn: None,
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create_web_worker_cb,
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maybe_inspector_server: None,
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should_break_on_first_statement: false,
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module_loader,
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get_error_class_fn: Some(&get_error_class_name),
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origin_storage_dir: None,
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blob_store,
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broadcast_channel,
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shared_array_buffer_store: None,
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compiled_wasm_module_store: None,
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};
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let mut worker = MainWorker::bootstrap_from_options(
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main_module.clone(),
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permissions,
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options,
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);
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// TODO(@AaronO): move to a JsRuntime Extension passed into options
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{
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let js_runtime = &mut worker.js_runtime;
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js_runtime
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.op_state()
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.borrow_mut()
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.put::<ProcState>(ps.clone());
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ops::errors::init(js_runtime);
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ops::runtime_compiler::init(js_runtime);
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js_runtime.sync_ops_cache();
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}
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worker.execute_main_module(&main_module).await?;
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worker.execute_script(
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&located_script_name!(),
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"window.dispatchEvent(new Event('load'))",
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)?;
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worker.run_event_loop(true).await?;
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worker.execute_script(
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&located_script_name!(),
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"window.dispatchEvent(new Event('unload'))",
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)?;
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std::process::exit(0);
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}
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fn get_error_class_name(e: &AnyError) -> &'static str {
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deno_runtime::errors::get_error_class_name(e).unwrap_or_else(|| {
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panic!(
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"Error '{}' contains boxed error of unsupported type:{}",
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e,
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e.chain()
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.map(|e| format!("\n {:?}", e))
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.collect::<String>()
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);
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})
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}
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