feat: blob URL support (#10045)

This commit adds blob URL support. Blob URLs are stored in a process
global storage, that can be accessed from all workers, and the module
loader. Blob URLs can be created using `URL.createObjectURL` and revoked
using `URL.revokeObjectURL`.

This commit does not add support for `fetch`ing blob URLs. This will be
added in a follow up commit.

Cargo.lock

@@ -621,6 +621,7 @@ name = "deno_file"
 version = "0.1.0"
 dependencies = [
  "deno_core",
+ "uuid",
 ]
 
 [[package]]

cli/disk_cache.rs

@@ -67,7 +67,7 @@ impl DiskCache {
           out.push(path_seg);
         }
       }
-      "http" | "https" | "data" => out = url_to_filename(url)?,
+      "http" | "https" | "data" | "blob" => out = url_to_filename(url)?,
       "file" => {
         let path = match url.to_file_path() {
           Ok(path) => path,

cli/file_fetcher.rs

@@ -18,9 +18,11 @@ use deno_core::futures;
 use deno_core::futures::future::FutureExt;
 use deno_core::ModuleSpecifier;
 use deno_runtime::deno_fetch::reqwest;
+use deno_runtime::deno_file::BlobUrlStore;
 use deno_runtime::permissions::Permissions;
 use log::debug;
 use log::info;
+use std::borrow::Borrow;
 use std::collections::HashMap;
 use std::env;
 use std::fs;
@@ -32,7 +34,8 @@ use std::sync::Arc;
 use std::sync::Mutex;
 
 static DENO_AUTH_TOKENS: &str = "DENO_AUTH_TOKENS";
-pub const SUPPORTED_SCHEMES: [&str; 4] = ["data", "file", "http", "https"];
+pub const SUPPORTED_SCHEMES: [&str; 5] =
+  ["data", "blob", "file", "http", "https"];
 
 /// A structure representing a source file.
 #[derive(Debug, Clone, Eq, PartialEq)]
@@ -317,6 +320,7 @@ pub struct FileFetcher {
   cache_setting: CacheSetting,
   http_cache: HttpCache,
   http_client: reqwest::Client,
+  blob_url_store: BlobUrlStore,
 }
 
 impl FileFetcher {
@@ -325,6 +329,7 @@ impl FileFetcher {
     cache_setting: CacheSetting,
     allow_remote: bool,
     ca_data: Option<Vec<u8>>,
+    blob_url_store: BlobUrlStore,
   ) -> Result<Self, AnyError> {
     Ok(Self {
       auth_tokens: AuthTokens::new(env::var(DENO_AUTH_TOKENS).ok()),
@@ -333,6 +338,7 @@ impl FileFetcher {
       cache_setting,
       http_cache,
       http_client: create_http_client(get_user_agent(), ca_data)?,
+      blob_url_store,
     })
   }
 
@@ -446,6 +452,62 @@ impl FileFetcher {
     })
   }
 
+  /// Get a blob URL.
+  fn fetch_blob_url(
+    &self,
+    specifier: &ModuleSpecifier,
+  ) -> Result<File, AnyError> {
+    debug!("FileFetcher::fetch_blob_url() - specifier: {}", specifier);
+    match self.fetch_cached(specifier, 0) {
+      Ok(Some(file)) => return Ok(file),
+      Ok(None) => {}
+      Err(err) => return Err(err),
+    }
+
+    if self.cache_setting == CacheSetting::Only {
+      return Err(custom_error(
+        "NotFound",
+        format!(
+          "Specifier not found in cache: \"{}\", --cached-only is specified.",
+          specifier
+        ),
+      ));
+    }
+
+    let blob_url_storage = self.blob_url_store.borrow();
+    let blob = blob_url_storage.get(specifier)?.ok_or_else(|| {
+      custom_error(
+        "NotFound",
+        format!("Blob URL not found: \"{}\".", specifier),
+      )
+    })?;
+
+    let content_type = blob.media_type;
+
+    let (media_type, maybe_charset) =
+      map_content_type(specifier, Some(content_type.clone()));
+    let source =
+      strip_shebang(get_source_from_bytes(blob.data, maybe_charset)?);
+
+    let local =
+      self
+        .http_cache
+        .get_cache_filename(specifier)
+        .ok_or_else(|| {
+          generic_error("Cannot convert specifier to cached filename.")
+        })?;
+    let mut headers = HashMap::new();
+    headers.insert("content-type".to_string(), content_type);
+    self.http_cache.set(specifier, headers, source.as_bytes())?;
+
+    Ok(File {
+      local,
+      maybe_types: None,
+      media_type,
+      source,
+      specifier: specifier.clone(),
+    })
+  }
   /// Asynchronously fetch remote source file specified by the URL following
   /// redirects.
   ///
@@ -555,6 +617,12 @@ impl FileFetcher {
         self.cache.insert(specifier.clone(), file.clone());
       }
       result
+    } else if scheme == "blob" {
+      let result = self.fetch_blob_url(specifier);
+      if let Ok(file) = &result {
+        self.cache.insert(specifier.clone(), file.clone());
+      }
+      result
     } else if !self.allow_remote {
       Err(custom_error(
         "NoRemote",
@@ -604,6 +672,7 @@ mod tests {
   use deno_core::error::get_custom_error_class;
   use deno_core::resolve_url;
   use deno_core::resolve_url_or_path;
+  use deno_runtime::deno_file::Blob;
   use std::rc::Rc;
   use tempfile::TempDir;
 
@@ -611,14 +680,29 @@ mod tests {
     cache_setting: CacheSetting,
     maybe_temp_dir: Option<Rc<TempDir>>,
   ) -> (FileFetcher, Rc<TempDir>) {
+    let (file_fetcher, temp_dir, _) =
+      setup_with_blob_url_store(cache_setting, maybe_temp_dir);
+    (file_fetcher, temp_dir)
+  }
+
+  fn setup_with_blob_url_store(
+    cache_setting: CacheSetting,
+    maybe_temp_dir: Option<Rc<TempDir>>,
+  ) -> (FileFetcher, Rc<TempDir>, BlobUrlStore) {
     let temp_dir = maybe_temp_dir.unwrap_or_else(|| {
       Rc::new(TempDir::new().expect("failed to create temp directory"))
     });
     let location = temp_dir.path().join("deps");
-    let file_fetcher =
-      FileFetcher::new(HttpCache::new(&location), cache_setting, true, None)
+    let blob_url_store = BlobUrlStore::default();
+    let file_fetcher = FileFetcher::new(
+      HttpCache::new(&location),
+      cache_setting,
+      true,
+      None,
+      blob_url_store.clone(),
+    )
     .expect("setup failed");
-    (file_fetcher, temp_dir)
+    (file_fetcher, temp_dir, blob_url_store)
   }
 
   macro_rules! file_url {
@@ -988,6 +1072,36 @@ mod tests {
     assert_eq!(file.specifier, specifier);
   }
 
+  #[tokio::test]
+  async fn test_fetch_blob_url() {
+    let (file_fetcher, _, blob_url_store) =
+      setup_with_blob_url_store(CacheSetting::Use, None);
+
+    let specifier = blob_url_store.insert(
+      Blob {
+        data:
+          "export const a = \"a\";\n\nexport enum A {\n  A,\n  B,\n  C,\n}\n"
+            .as_bytes()
+            .to_vec(),
+        media_type: "application/typescript".to_string(),
+      },
+      None,
+    );
+
+    let result = file_fetcher
+      .fetch(&specifier, &Permissions::allow_all())
+      .await;
+    assert!(result.is_ok());
+    let file = result.unwrap();
+    assert_eq!(
+      file.source,
+      "export const a = \"a\";\n\nexport enum A {\n  A,\n  B,\n  C,\n}\n"
+    );
+    assert_eq!(file.media_type, MediaType::TypeScript);
+    assert_eq!(file.maybe_types, None);
+    assert_eq!(file.specifier, specifier);
+  }
+
   #[tokio::test]
   async fn test_fetch_complex() {
     let _http_server_guard = test_util::http_server();
@@ -1061,6 +1175,7 @@ mod tests {
       CacheSetting::ReloadAll,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("setup failed");
     let result = file_fetcher
@@ -1087,6 +1202,7 @@ mod tests {
       CacheSetting::Use,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not create file fetcher");
     let specifier =
@@ -1114,6 +1230,7 @@ mod tests {
       CacheSetting::Use,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not create file fetcher");
     let result = file_fetcher_02
@@ -1274,6 +1391,7 @@ mod tests {
       CacheSetting::Use,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not create file fetcher");
     let specifier =
@@ -1304,6 +1422,7 @@ mod tests {
       CacheSetting::Use,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not create file fetcher");
     let result = file_fetcher_02
@@ -1413,6 +1532,7 @@ mod tests {
       CacheSetting::Use,
       false,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not create file fetcher");
     let specifier =
@@ -1439,6 +1559,7 @@ mod tests {
       CacheSetting::Only,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not create file fetcher");
     let file_fetcher_02 = FileFetcher::new(
@@ -1446,6 +1567,7 @@ mod tests {
       CacheSetting::Use,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not create file fetcher");
     let specifier =

cli/http_cache.rs

@@ -39,7 +39,7 @@ fn base_url_to_filename(url: &Url) -> Option<PathBuf> {
       };
       out.push(host_port);
     }
-    "data" => (),
+    "data" | "blob" => (),
     scheme => {
       error!("Don't know how to create cache name for scheme: {}", scheme);
       return None;

cli/main.rs

@@ -122,6 +122,7 @@ fn create_web_worker_callback(
       ts_version: version::TYPESCRIPT.to_string(),
       no_color: !colors::use_color(),
       get_error_class_fn: Some(&crate::errors::get_error_class_name),
+      blob_url_store: program_state.blob_url_store.clone(),
     };
 
     let mut worker = WebWorker::from_options(
@@ -199,6 +200,7 @@ pub fn create_main_worker(
     no_color: !colors::use_color(),
     get_error_class_fn: Some(&crate::errors::get_error_class_name),
     location: program_state.flags.location.clone(),
+    blob_url_store: program_state.blob_url_store.clone(),
   };
 
   let mut worker = MainWorker::from_options(main_module, permissions, &options);

cli/program_state.rs

@@ -14,6 +14,7 @@ use crate::module_graph::TypeLib;
 use crate::source_maps::SourceMapGetter;
 use crate::specifier_handler::FetchHandler;
 use crate::version;
+use deno_runtime::deno_file::BlobUrlStore;
 use deno_runtime::inspector::InspectorServer;
 use deno_runtime::permissions::Permissions;
 
@@ -56,6 +57,7 @@ pub struct ProgramState {
   pub maybe_import_map: Option<ImportMap>,
   pub maybe_inspector_server: Option<Arc<InspectorServer>>,
   pub ca_data: Option<Vec<u8>>,
+  pub blob_url_store: BlobUrlStore,
 }
 
 impl ProgramState {
@@ -80,11 +82,14 @@ impl ProgramState {
       CacheSetting::Use
     };
 
+    let blob_url_store = BlobUrlStore::default();
+
     let file_fetcher = FileFetcher::new(
       http_cache,
       cache_usage,
       !flags.no_remote,
       ca_data.clone(),
+      blob_url_store.clone(),
     )?;
 
     let lockfile = if let Some(filename) = &flags.lock {
@@ -131,6 +136,7 @@ impl ProgramState {
       maybe_import_map,
       maybe_inspector_server,
       ca_data,
+      blob_url_store,
     };
     Ok(Arc::new(program_state))
   }
@@ -257,7 +263,7 @@ impl ProgramState {
     match url.scheme() {
       // we should only be looking for emits for schemes that denote external
       // modules, which the disk_cache supports
-      "wasm" | "file" | "http" | "https" | "data" => (),
+      "wasm" | "file" | "http" | "https" | "data" | "blob" => (),
       _ => {
         return None;
       }

cli/source_maps.rs

@@ -142,6 +142,7 @@ pub fn get_orig_position<G: SourceMapGetter>(
               // around it. Use the `file_name` we get from V8 if
               // `source_file_name` does not parse as a URL.
               let file_name = match deno_core::resolve_url(source_file_name) {
+                Ok(m) if m.scheme() == "blob" => file_name,
                 Ok(m) => m.to_string(),
                 Err(_) => file_name,
               };

cli/specifier_handler.rs

@@ -306,7 +306,9 @@ impl SpecifierHandler for FetchHandler {
           }
         })?;
       let url = &source_file.specifier;
-      let is_remote = !(url.scheme() == "file" || url.scheme() == "data");
+      let is_remote = !(url.scheme() == "file"
+        || url.scheme() == "data"
+        || url.scheme() == "blob");
       let filename = disk_cache.get_cache_filename_with_extension(url, "meta");
       let maybe_version = if let Some(filename) = filename {
         if let Ok(bytes) = disk_cache.get(&filename) {
@@ -569,6 +571,7 @@ pub mod tests {
   use crate::file_fetcher::CacheSetting;
   use crate::http_cache::HttpCache;
   use deno_core::resolve_url_or_path;
+  use deno_runtime::deno_file::BlobUrlStore;
   use tempfile::TempDir;
 
   macro_rules! map (
@@ -593,6 +596,7 @@ pub mod tests {
       CacheSetting::Use,
       true,
       None,
+      BlobUrlStore::default(),
     )
     .expect("could not setup");
     let disk_cache = deno_dir.gen_cache;

cli/standalone.rs

@@ -15,6 +15,7 @@ use deno_core::v8_set_flags;
 use deno_core::ModuleLoader;
 use deno_core::ModuleSpecifier;
 use deno_core::OpState;
+use deno_runtime::deno_file::BlobUrlStore;
 use deno_runtime::permissions::Permissions;
 use deno_runtime::permissions::PermissionsOptions;
 use deno_runtime::worker::MainWorker;
@@ -158,6 +159,7 @@ pub async fn run(
 ) -> Result<(), AnyError> {
   let main_module = resolve_url(SPECIFIER)?;
   let permissions = Permissions::from_options(&metadata.permissions);
+  let blob_url_store = BlobUrlStore::default();
   let module_loader = Rc::new(EmbeddedModuleLoader(source_code));
   let create_web_worker_cb = Arc::new(|_| {
     todo!("Worker are currently not supported in standalone binaries");
@@ -189,6 +191,7 @@ pub async fn run(
     no_color: !colors::use_color(),
     get_error_class_fn: Some(&get_error_class_name),
     location: metadata.location,
+    blob_url_store,
   };
   let mut worker =
     MainWorker::from_options(main_module.clone(), permissions, &options);

cli/tests/import_blob_url.ts

@@ -0,0 +1,13 @@
+const blob = new Blob(
+  ['export const a = "a";\n\nexport enum A {\n  A,\n  B,\n  C,\n}\n'],
+  {
+    type: "application/typescript",
+  },
+);
+const url = URL.createObjectURL(blob);
+
+const a = await import(url);
+
+console.log(a.a);
+console.log(a.A);
+console.log(a.A.A);

cli/tests/import_blob_url.ts.out

@@ -0,0 +1,3 @@
+a
+{ "0": "A", "1": "B", "2": "C", A: 0, B: 1, C: 2 }
+0

cli/tests/import_blob_url_error_stack.ts

@@ -0,0 +1,13 @@
+const blob = new Blob(
+  [
+    "enum A {\n  A,\n  B,\n  C,\n }\n \n export function a() {\n   throw new Error(`Hello ${A.C}`);\n }\n ",
+  ],
+  {
+    type: "application/typescript",
+  },
+);
+const url = URL.createObjectURL(blob);
+
+const { a } = await import(url);
+
+a();

cli/tests/import_blob_url_error_stack.ts.out

@@ -0,0 +1,6 @@
+[WILDCARD]error: Uncaught (in promise) Error: Hello 2
+   throw new Error(`Hello ${A.C}`);
+         ^
+    at a (blob:null/[WILDCARD]:8:10)
+    at file:///[WILDCARD]/cli/tests/import_blob_url_error_stack.ts:13:1
+[WILDCARD]

cli/tests/import_blob_url_import_relative.ts

@@ -0,0 +1,8 @@
+const blob = new Blob(['export { a } from "./a.ts";'], {
+  type: "application/javascript",
+});
+const url = URL.createObjectURL(blob);
+
+const a = await import(url);
+
+console.log(a);

cli/tests/import_blob_url_import_relative.ts.out

@@ -0,0 +1,4 @@
+error: Uncaught (in promise) TypeError: invalid URL: relative URL with a cannot-be-a-base base
+const a = await import(url);
+          ^
+    at async file://[WILDCARD]/cli/tests/import_blob_url_import_relative.ts:6:11

cli/tests/import_blob_url_imports.ts

@@ -0,0 +1,11 @@
+const blob = new Blob(
+  [
+    'export { printHello } from "http://localhost:4545/cli/tests/subdir/mod2.ts"',
+  ],
+  { type: "application/javascript" },
+);
+const url = URL.createObjectURL(blob);
+
+const { printHello } = await import(url);
+
+printHello();

cli/tests/import_blob_url_imports.ts.out

@@ -0,0 +1 @@
+Hello

cli/tests/import_blob_url_jsx.ts

@@ -0,0 +1,16 @@
+const blob = new Blob(
+  ["export default function() {\n  return <div>Hello Deno!</div>\n}\n"],
+  { type: "text/jsx" },
+);
+const url = URL.createObjectURL(blob);
+
+const { default: render } = await import(url);
+
+// deno-lint-ignore no-explicit-any
+(globalThis as any).React = {
+  createElement(...args: unknown[]) {
+    console.log(...args);
+  },
+};
+
+render();

cli/tests/import_blob_url_jsx.ts.out

@@ -0,0 +1 @@
+div null Hello Deno!

cli/tests/integration_tests.rs

@@ -3683,6 +3683,34 @@ console.log("finish");
     output: "import_dynamic_data_url.ts.out",
   });
 
+  itest!(import_blob_url_error_stack {
+    args: "run --quiet --reload import_blob_url_error_stack.ts",
+    output: "import_blob_url_error_stack.ts.out",
+    exit_code: 1,
+  });
+
+  itest!(import_blob_url_import_relative {
+    args: "run --quiet --reload import_blob_url_import_relative.ts",
+    output: "import_blob_url_import_relative.ts.out",
+    exit_code: 1,
+  });
+
+  itest!(import_blob_url_imports {
+    args: "run --quiet --reload import_blob_url_imports.ts",
+    output: "import_blob_url_imports.ts.out",
+    http_server: true,
+  });
+
+  itest!(import_blob_url_jsx {
+    args: "run --quiet --reload import_blob_url_jsx.ts",
+    output: "import_blob_url_jsx.ts.out",
+  });
+
+  itest!(import_blob_url {
+    args: "run --quiet --reload import_blob_url.ts",
+    output: "import_blob_url.ts.out",
+  });
+
   itest!(import_file_with_colon {
     args: "run --quiet --reload import_file_with_colon.ts",
     output: "import_file_with_colon.ts.out",

cli/tests/unsupported_dynamic_import_scheme.out

@@ -1,5 +1,6 @@
 error: Uncaught (in promise) TypeError: Unsupported scheme "xxx" for module "xxx:". Supported schemes: [
     "data",
+    "blob",
     "file",
     "http",
     "https",

cli/tsc.rs

@@ -110,6 +110,19 @@ fn hash_data_url(
   format!("data:///{}{}", hash, media_type.as_ts_extension())
 }
 
+fn hash_blob_url(
+  specifier: &ModuleSpecifier,
+  media_type: &MediaType,
+) -> String {
+  assert_eq!(
+    specifier.scheme(),
+    "blob",
+    "Specifier must be a blob: specifier."
+  );
+  let hash = crate::checksum::gen(&[specifier.path().as_bytes()]);
+  format!("blob:///{}{}", hash, media_type.as_ts_extension())
+}
+
 /// tsc only supports `.ts`, `.tsx`, `.d.ts`, `.js`, or `.jsx` as root modules
 /// and so we have to detect the apparent media type based on extensions it
 /// supports.
@@ -378,15 +391,19 @@ fn resolve(state: &mut State, args: Value) -> Result<Value, AnyError> {
               resolved_specifier
             )
           };
-          let resolved_specifier_str = if resolved_specifier.scheme() == "data"
-          {
-            let specifier_str = hash_data_url(&resolved_specifier, &media_type);
+          let resolved_specifier_str = match resolved_specifier.scheme() {
+            "data" | "blob" => {
+              let specifier_str = if resolved_specifier.scheme() == "data" {
+                hash_data_url(&resolved_specifier, &media_type)
+              } else {
+                hash_blob_url(&resolved_specifier, &media_type)
+              };
               state
                 .data_url_map
                 .insert(specifier_str.clone(), resolved_specifier);
               specifier_str
-          } else {
-            resolved_specifier.to_string()
+            }
+            _ => resolved_specifier.to_string(),
           };
           resolved.push((
             resolved_specifier_str,
@@ -439,12 +456,17 @@ pub fn exec(request: Request) -> Result<Response, AnyError> {
   let root_names: Vec<String> = request
     .root_names
     .iter()
-    .map(|(s, mt)| {
-      if s.scheme() == "data" {
-        let specifier_str = hash_data_url(s, mt);
+    .map(|(s, mt)| match s.scheme() {
+      "data" | "blob" => {
+        let specifier_str = if s.scheme() == "data" {
+          hash_data_url(&s, &mt)
+        } else {
+          hash_blob_url(&s, &mt)
+        };
         data_url_map.insert(specifier_str.clone(), s.clone());
         specifier_str
-      } else {
+      }
+      _ => {
         let ext_media_type = get_tsc_media_type(s);
         if mt != &ext_media_type {
           let new_specifier = format!("{}{}", s, mt.as_ts_extension());

op_crates/file/03_blob_url.js

@@ -0,0 +1,63 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+// @ts-check
+/// <reference no-default-lib="true" />
+/// <reference path="../../core/lib.deno_core.d.ts" />
+/// <reference path="../webidl/internal.d.ts" />
+/// <reference path="../web/internal.d.ts" />
+/// <reference path="../web/lib.deno_web.d.ts" />
+/// <reference path="../url/internal.d.ts" />
+/// <reference path="../url/lib.deno_url.d.ts" />
+/// <reference path="./internal.d.ts" />
+/// <reference path="./lib.deno_file.d.ts" />
+/// <reference lib="esnext" />
+"use strict";
+
+((window) => {
+  const core = Deno.core;
+  // const webidl = window.__bootstrap.webidl;
+  const { _byteSequence } = window.__bootstrap.file;
+  const { URL } = window.__bootstrap.url;
+
+  /** 
+   * @param {Blob} blob
+   * @returns {string}
+   */
+  function createObjectURL(blob) {
+    // const prefix = "Failed to execute 'createObjectURL' on 'URL'";
+    // webidl.requiredArguments(arguments.length, 1, { prefix });
+    // blob = webidl.converters["Blob"](blob, {
+    //   context: "Argument 1",
+    //   prefix,
+    // });
+
+    const url = core.jsonOpSync(
+      "op_file_create_object_url",
+      blob.type,
+      blob[_byteSequence],
+    );
+
+    return url;
+  }
+
+  /** 
+   * @param {string} url
+   * @returns {void}
+   */
+  function revokeObjectURL(url) {
+    // const prefix = "Failed to execute 'revokeObjectURL' on 'URL'";
+    // webidl.requiredArguments(arguments.length, 1, { prefix });
+    // url = webidl.converters["DOMString"](url, {
+    //   context: "Argument 1",
+    //   prefix,
+    // });
+
+    core.jsonOpSync(
+      "op_file_revoke_object_url",
+      url,
+    );
+  }
+
+  URL.createObjectURL = createObjectURL;
+  URL.revokeObjectURL = revokeObjectURL;
+})(globalThis);

op_crates/file/Cargo.toml

@@ -15,3 +15,4 @@ path = "lib.rs"
 
 [dependencies]
 deno_core = { version = "0.83.0", path = "../../core" }
+uuid = { version = "0.8.2", features = ["v4"] }

op_crates/file/lib.rs

@@ -1,7 +1,85 @@
 // Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
 
+use deno_core::error::null_opbuf;
+use deno_core::error::AnyError;
+use deno_core::url::Url;
 use deno_core::JsRuntime;
+use deno_core::ModuleSpecifier;
+use deno_core::ZeroCopyBuf;
+use std::collections::HashMap;
 use std::path::PathBuf;
+use std::sync::Arc;
+use std::sync::Mutex;
+use uuid::Uuid;
+
+#[derive(Clone)]
+pub struct Blob {
+  pub data: Vec<u8>,
+  pub media_type: String,
+}
+
+pub struct Location(pub Url);
+
+#[derive(Default, Clone)]
+pub struct BlobUrlStore(Arc<Mutex<HashMap<Url, Blob>>>);
+
+impl BlobUrlStore {
+  pub fn get(&self, url: &ModuleSpecifier) -> Result<Option<Blob>, AnyError> {
+    let blob_store = self.0.lock().unwrap();
+    Ok(blob_store.get(url).cloned())
+  }
+
+  pub fn insert(&self, blob: Blob, maybe_location: Option<Url>) -> Url {
+    let origin = if let Some(location) = maybe_location {
+      location.origin().ascii_serialization()
+    } else {
+      "null".to_string()
+    };
+    let id = Uuid::new_v4();
+    let url = Url::parse(&format!("blob:{}/{}", origin, id)).unwrap();
+
+    let mut blob_store = self.0.lock().unwrap();
+    blob_store.insert(url.clone(), blob);
+
+    url
+  }
+
+  pub fn remove(&self, url: &ModuleSpecifier) {
+    let mut blob_store = self.0.lock().unwrap();
+    blob_store.remove(&url);
+  }
+}
+
+pub fn op_file_create_object_url(
+  state: &mut deno_core::OpState,
+  media_type: String,
+  zero_copy: Option<ZeroCopyBuf>,
+) -> Result<String, AnyError> {
+  let data = zero_copy.ok_or_else(null_opbuf)?;
+  let blob = Blob {
+    data: data.to_vec(),
+    media_type,
+  };
+
+  let maybe_location = state.try_borrow::<Location>();
+  let blob_store = state.borrow::<BlobUrlStore>();
+
+  let url =
+    blob_store.insert(blob, maybe_location.map(|location| location.0.clone()));
+
+  Ok(url.to_string())
+}
+
+pub fn op_file_revoke_object_url(
+  state: &mut deno_core::OpState,
+  url: String,
+  _zero_copy: Option<ZeroCopyBuf>,
+) -> Result<(), AnyError> {
+  let url = Url::parse(&url)?;
+  let blob_store = state.borrow::<BlobUrlStore>();
+  blob_store.remove(&url);
+  Ok(())
+}
 
 /// Load and execute the javascript code.
 pub fn init(isolate: &mut JsRuntime) {
@@ -11,6 +89,10 @@ pub fn init(isolate: &mut JsRuntime) {
       "deno:op_crates/file/02_filereader.js",
       include_str!("02_filereader.js"),
     ),
+    (
+      "deno:op_crates/file/03_blob_url.js",
+      include_str!("03_blob_url.js"),
+    ),
   ];
   for (url, source_code) in files {
     isolate.execute(url, source_code).unwrap();

op_crates/url/00_url.js

@@ -389,14 +389,6 @@
     toJSON() {
       return this.href;
     }
-
-    static createObjectURL() {
-      throw new Error("Not implemented");
-    }
-
-    static revokeObjectURL() {
-      throw new Error("Not implemented");
-    }
   }
 
   window.__bootstrap.url = {

op_crates/url/lib.deno_url.d.ts

@@ -155,8 +155,8 @@ declare class URLSearchParams {
 /** The URL interface represents an object providing static methods used for creating object URLs. */
 declare class URL {
   constructor(url: string, base?: string | URL);
-  createObjectURL(object: any): string;
-  revokeObjectURL(url: string): void;
+  static createObjectURL(blob: Blob): string;
+  static revokeObjectURL(url: string): void;
 
   hash: string;
   host: string;

runtime/examples/hello_runtime.rs

@@ -2,6 +2,7 @@
 
 use deno_core::error::AnyError;
 use deno_core::FsModuleLoader;
+use deno_runtime::deno_file::BlobUrlStore;
 use deno_runtime::permissions::Permissions;
 use deno_runtime::worker::MainWorker;
 use deno_runtime::worker::WorkerOptions;
@@ -39,6 +40,7 @@ async fn main() -> Result<(), AnyError> {
     no_color: false,
     get_error_class_fn: Some(&get_error_class_name),
     location: None,
+    blob_url_store: BlobUrlStore::default(),
   };
 
   let js_path =

runtime/ops/file.rs

@@ -0,0 +1,31 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+use deno_core::url::Url;
+use deno_file::op_file_create_object_url;
+use deno_file::op_file_revoke_object_url;
+use deno_file::BlobUrlStore;
+use deno_file::Location;
+
+pub fn init(
+  rt: &mut deno_core::JsRuntime,
+  blob_url_store: BlobUrlStore,
+  maybe_location: Option<Url>,
+) {
+  {
+    let op_state = rt.op_state();
+    let mut op_state = op_state.borrow_mut();
+    op_state.put(blob_url_store);
+    if let Some(location) = maybe_location {
+      op_state.put(Location(location));
+    }
+  }
+  super::reg_json_sync(
+    rt,
+    "op_file_create_object_url",
+    op_file_create_object_url,
+  );
+  super::reg_json_sync(
+    rt,
+    "op_file_revoke_object_url",
+    op_file_revoke_object_url,
+  );
+}

runtime/ops/mod.rs

@@ -2,6 +2,7 @@
 
 pub mod crypto;
 pub mod fetch;
+pub mod file;
 pub mod fs;
 pub mod fs_events;
 pub mod io;

runtime/permissions.rs

@@ -587,6 +587,7 @@ impl Permissions {
         ))),
       },
       "data" => Ok(()),
+      "blob" => Ok(()),
       _ => self.net.check_url(specifier),
     }
   }

runtime/web_worker.rs

@@ -23,6 +23,7 @@ use deno_core::JsRuntime;
 use deno_core::ModuleLoader;
 use deno_core::ModuleSpecifier;
 use deno_core::RuntimeOptions;
+use deno_file::BlobUrlStore;
 use log::debug;
 use std::env;
 use std::rc::Rc;
@@ -155,6 +156,7 @@ pub struct WebWorkerOptions {
   /// Sets `Deno.noColor` in JS runtime.
   pub no_color: bool,
   pub get_error_class_fn: Option<GetErrorClassFn>,
+  pub blob_url_store: BlobUrlStore,
 }
 
 impl WebWorker {
@@ -217,7 +219,7 @@ impl WebWorker {
       }
 
       ops::web_worker::init(js_runtime, sender.clone(), handle);
-      ops::runtime::init(js_runtime, main_module);
+      ops::runtime::init(js_runtime, main_module.clone());
       ops::fetch::init(
         js_runtime,
         options.user_agent.clone(),
@@ -232,6 +234,11 @@ impl WebWorker {
       ops::reg_json_sync(js_runtime, "op_close", deno_core::op_close);
       ops::reg_json_sync(js_runtime, "op_resources", deno_core::op_resources);
       ops::url::init(js_runtime);
+      ops::file::init(
+        js_runtime,
+        options.blob_url_store.clone(),
+        Some(main_module),
+      );
       ops::io::init(js_runtime);
       ops::webgpu::init(js_runtime);
       ops::websocket::init(
@@ -518,6 +525,7 @@ mod tests {
       ts_version: "x".to_string(),
       no_color: true,
       get_error_class_fn: None,
+      blob_url_store: BlobUrlStore::default(),
     };
 
     let mut worker = WebWorker::from_options(

runtime/worker.rs

@@ -21,6 +21,7 @@ use deno_core::ModuleId;
 use deno_core::ModuleLoader;
 use deno_core::ModuleSpecifier;
 use deno_core::RuntimeOptions;
+use deno_file::BlobUrlStore;
 use log::debug;
 use std::env;
 use std::rc::Rc;
@@ -66,6 +67,7 @@ pub struct WorkerOptions {
   pub no_color: bool,
   pub get_error_class_fn: Option<GetErrorClassFn>,
   pub location: Option<Url>,
+  pub blob_url_store: BlobUrlStore,
 }
 
 impl MainWorker {
@@ -129,6 +131,11 @@ impl MainWorker {
       ops::reg_json_sync(js_runtime, "op_close", deno_core::op_close);
       ops::reg_json_sync(js_runtime, "op_resources", deno_core::op_resources);
       ops::url::init(js_runtime);
+      ops::file::init(
+        js_runtime,
+        options.blob_url_store.clone(),
+        options.location.clone(),
+      );
       ops::fs_events::init(js_runtime);
       ops::fs::init(js_runtime);
       ops::io::init(js_runtime);
@@ -298,6 +305,7 @@ mod tests {
       no_color: true,
       get_error_class_fn: None,
       location: None,
+      blob_url_store: BlobUrlStore::default(),
     };
 
     MainWorker::from_options(main_module, permissions, &options)