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Loading native Node module fails with "stream did not contain valid UTF-8" #17246

Open ealib opened 1 year ago

ealib commented 1 year ago

Deno

Output

error: Unable to load C:\Users\UserName\AppData\Local\deno\npm\registry.npmjs.org\node-mdaemon-api\22.0.3-alpha.19\node-mdaemon-api.node imported from file:///C:/tmp/test-native.ts

Caused by:
    stream did not contain valid UTF-8

How to reproduce

Command

deno run --unstable --allow-all test-native.ts

Script test-native.ts is

import { getModuleInfo } from 'npm:node-mdaemon-api'; 

const moduleInfo = getModuleInfo();

console.dir(moduleInfo);
ealib commented 1 year ago

For comparison, this script

'use strict'

const md = require('node-mdaemon-api');

const moduleInfo = md.getModuleInfo();

console.dir(moduleInfo);

works correctly under Node v18.13.0.

bartlomieju commented 1 year ago

Node.js refuses to load this file:

node:internal/errors:484
    ErrorCaptureStackTrace(err);
    ^

TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".node" for /Users/ib/dev/test_napi/asdf/asdf.darwin-arm64.node
    at new NodeError (node:internal/errors:393:5)
    at Object.getFileProtocolModuleFormat [as file:] (node:internal/modules/esm/get_format:75:9)
    at defaultGetFormat (node:internal/modules/esm/get_format:114:38)
    at defaultLoad (node:internal/modules/esm/load:81:20)
    at nextLoad (node:internal/modules/esm/loader:161:28)
    at ESMLoader.load (node:internal/modules/esm/loader:594:26)
    at ESMLoader.moduleProvider (node:internal/modules/esm/loader:446:22)
    at new ModuleJob (node:internal/modules/esm/module_job:64:26)
    at #createModuleJob (node:internal/modules/esm/loader:469:17)
    at ESMLoader.getModuleJob (node:internal/modules/esm/loader:423:34) {
  code: 'ERR_UNKNOWN_FILE_EXTENSION'
}

From what I gather native extensions must always be require()d. We need to improve error message here.

ealib commented 1 year ago

Thank you @bartlomieju for taking the time to verify this behaviour. Unfortunately I forgot to point out that the native node-mdaemon-api module (I am the author) only exists for Windows x64, not for Mac.

I created a repository with these scripts by specifying exactly the requirements in the package.json and, in particular, "type": "module", to force Node to operate in ESM mode, thus explicitly requiring native modules to be loaded with require, as you observed.

bartlomieju commented 1 year ago

Thank you @bartlomieju for taking the time to verify this behaviour. Unfortunately I forgot to point out that the native node-mdaemon-api module (I am the author) only exists for Windows x64, not for Mac.

No worries, I figured that out and created a simple project that does the same thing but can be compiled on ARM.

I created a repository with these scripts by specifying exactly the requirements in the package.json and, in particular, "type": "module", to force Node to operate in ESM mode, thus explicitly requiring native modules to be loaded with require, as you observed.

Sure, I'll try to look into fixing this problem next week - we should at least have a nice error saying what's wrong here. Side note: it's surprising that there's still no way to import Node API modules via ESM.

ealib commented 1 year ago

With

C:\>deno --version
deno 1.33.3 (release, x86_64-pc-windows-msvc)
v8 11.4.183.2
typescript 5.0.4

the error message has changed

error: Unable to load C:\Users\UserName\AppData\Local\deno\npm\registry.npmjs.org\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api\node-mdaemon-api.node imported from file:///C:/tmp/test-native.ts

Caused by:
    invalid utf-8 sequence of 1 bytes from index 2
ealib commented 1 year ago

As @loynoir suggested in #19130 , I tried to directly import the native binary module, but Deno fails with the same error:

C:\Users\UserName\deno-issue-17246>deno repl -A
Deno 1.33.4
exit using ctrl+d, ctrl+c, or close()
> const md = await import('npm:node-mdaemon-api@23.0.0-alpha.21/node-mdaemon-api.node');
Uncaught TypeError: Unable to load C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api\node-mdaemon-api.node
  Caused by:
    invalid utf-8 sequence of 1 bytes from index 2
    at async <anonymous>:2:13
>
loynoir commented 1 year ago

@ealib

I did not suggest that.

I suggest

> await import('npm:node-mdaemon-api@23.0.0-alpha.21/cjs-wrapper-to-node-mdaemon-api-node.cjs');
ealib commented 1 year ago

@loynoir Sorry, I didn't realise you were suggesting writing a CJS module that in turn would take care of loading the native module.

I wrote a simple one index.cjs

'use strict'
const md = require('./node-mdaemon-api.node');
module.exports = md;

and running the minimal test.ts script

deno run --allow-all test.ts
const md = await import ('npm:node-mdaemon-api@23.0.0-alpha.21/index.cjs');

now outputs 

C:\Users\UserName\deno-issue-17246>deno run --allow-all test.ts
error: Uncaught TypeError: LoadLibraryExW failed
    at Object.Module._extensions..node (ext:deno_node/01_require.js:1029:24)
    at Module.load (ext:deno_node/01_require.js:880:32)
    at Function.Module._load (ext:deno_node/01_require.js:714:12)
    at Module.require (ext:deno_node/01_require.js:902:19)
    at require (ext:deno_node/01_require.js:1042:16)
    at Object.<anonymous> (file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs:2:12)
    at Object.<anonymous> (file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs:4:4)
    at Module._compile (ext:deno_node/01_require.js:969:34)
    at Object.Module._extensions..js (ext:deno_node/01_require.js:1002:10)
    at Module.load (ext:deno_node/01_require.js:880:32)

where I see that Deno finds the script correctly (it is in the same directory as node-mdaemon-api.node and Node executes it correctly), but then Deno itself fails to open the DLL file (LoadLibraryExW).

loynoir commented 1 year ago

@ealib

Are you using Node-API?

https://github.com/denoland/deno/issues/18444#issuecomment-1484151518

https://github.com/nodejs/node-addon-examples

ealib commented 1 year ago

@loynoir yes, I am (via node-addon-api 6.1.0).

ealib commented 1 year ago

With current deno --version

deno 1.36.0 (release, x86_64-pc-windows-msvc)
v8 11.6.189.12
typescript 5.1.6

you get a slightly different message when running test-native.ts:

C:\Users\UserName\deno-issue-17246>npm run start-deno

> deno-issue-17246@1.0.0 start-deno
> deno run --allow-all test-native.ts

error: Could not find npm package 'node-mdaemon-api' matching '*'.
    at file:///C:/Users/UserName/deno-issue-17246/test-native.ts:1:31

C:\Users\UserName\deno-issue-17246>

However, when running the minimal script

const md = await import ('npm:node-mdaemon-api@23.0.0-alpha.21/index.cjs');

but having placed the index.cjs file in the package, as suggested by @loynoir , the same LoadLibraryExW issue appears as with previous version:

C:\Users\UserName\deno-issue-17246>deno run -A --log-level debug test.ts
DEBUG RS - deno::args::package_json:147 - package.json file found at 'C:\Users\UserName\deno-issue-17246\package.json'
DEBUG RS - deno::cache::cache_db:129 - Opening cache C:\Users\Utente\AppData\Local\deno\dep_analysis_cache_v1...
DEBUG RS - deno::cache::cache_db:129 - Opening cache C:\Users\Utente\AppData\Local\deno\node_analysis_cache_v1...
DEBUG RS - deno::js:10 - Deno isolate init with snapshots.
DEBUG JS - args []
DEBUG RS - deno::worker:140 - main_module file:///C:/Users/UserName/deno-issue-17246/test.ts
DEBUG RS - deno::module_loader:111 - Preparing module load.
DEBUG RS - deno::module_loader:125 - Creating module graph.
DEBUG RS - deno::file_fetcher:516 - FileFetcher::fetch() - specifier: file:///C:/Users/UserName/deno-issue-17246/test.ts
DEBUG RS - deno_runtime::permissions:86 - ⚠️️  Granted read access to "C:\Users\UserName\deno-issue-17246\test.ts"
DEBUG RS - deno_npm::resolution::snapshot:712 - Resolved node-mdaemon-api@23.0.0-alpha.21 to node-mdaemon-api@23.0.0-alpha.21
DEBUG RS - deno_npm::resolution::graph:972 - <package-req> - Resolved node-mdaemon-api@23.0.0-alpha.21 to node-mdaemon-api@23.0.0-alpha.21
DEBUG RS - deno::util::fs:546 - Acquiring file lock at C:\Users\UserName\deno-issue-17246\node_modules\.deno\.deno.lock
DEBUG RS - deno::util::fs:565 - Acquired file lock at C:\Users\UserName\deno-issue-17246\node_modules\.deno\.deno.lock
DEBUG RS - deno::module_loader:188 - Prepared module load.
DEBUG RS - deno_core::runtime::bindings:272 - dyn_import specifier npm:node-mdaemon-api@23.0.0-alpha.21/index.cjs referrer file:///C:/Users/UserName/deno-issue-17246/test.ts
DEBUG RS - deno::npm::resolvers:121 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:121 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:121 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:141 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:121 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:141 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:141 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:141 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:141 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::resolvers:141 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno_runtime::permissions:86 - ⚠️️  Granted ffi access to "C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api\node-mdaemon-api.node"
error: Uncaught TypeError: LoadLibraryExW failed
    at Object.Module._extensions..node (node:module:778:26)
    at Module.load (node:module:656:34)
    at Function.Module._load (node:module:539:16)
    at Module.require (node:module:675:23)
    at require (node:module:789:20)
    at Object.<anonymous> (file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs:2:12)
    at Object.<anonymous> (file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs:6:4)
    at Module._compile (node:module:731:36)
    at Object.Module._extensions..js (node:module:745:12)
    at Module.load (node:module:656:34)

C:\Users\UserName\deno-issue-17246>
ealib commented 1 year ago

It all seems to boil down to a problem in the LoadLibraryExW call, as seen in these other issues: #16642 #17411

ealib commented 1 year ago

With current deno --version

deno 1.38.0 (release, x86_64-pc-windows-msvc)
v8 12.0.267.1
typescript 5.2.2

with same index.cjs file in the package, running a test.ts which contains the very bare code

const md = await import ('npm:node-mdaemon-api@23.0.0-alpha.21/index.cjs');

outputs

c:\Users\UserName\deno-issue-17246>deno run -A --log-level debug test.ts
DEBUG RS - deno::args::package_json:147 - package.json file found at 'C:\Users\UserName\deno-issue-17246\package.json'
DEBUG RS - deno::cache::cache_db:130 - Opening cache C:\Users\Utente\AppData\Local\deno\dep_analysis_cache_v1...
DEBUG RS - deno::cache::cache_db:130 - Opening cache C:\Users\Utente\AppData\Local\deno\node_analysis_cache_v1...
DEBUG RS - deno::js:11 - Deno isolate init with snapshots.
DEBUG JS - args []
DEBUG RS - deno::worker:150 - main_module file:///C:/Users/UserName/deno-issue-17246/test.ts
DEBUG RS - deno::module_loader:117 - Preparing module load.
DEBUG RS - deno::module_loader:132 - Creating module graph.
DEBUG RS - deno::file_fetcher:550 - FileFetcher::fetch() - specifier: file:///C:/Users/UserName/deno-issue-17246/test.ts
DEBUG RS - deno_runtime::permissions:86 - ⚠️️  Granted read access to "C:\Users\UserName\deno-issue-17246\test.ts"
DEBUG RS - deno_npm::resolution::snapshot:711 - Resolved node-mdaemon-api@23.0.0-alpha.21 to node-mdaemon-api@23.0.0-alpha.21
DEBUG RS - deno_npm::resolution::graph:972 - <package-req> - Resolved node-mdaemon-api@23.0.0-alpha.21 to node-mdaemon-api@23.0.0-alpha.21
DEBUG RS - deno::util::fs:577 - Acquiring file lock at C:\Users\UserName\deno-issue-17246\node_modules\.deno\.deno.lock
DEBUG RS - deno::util::fs:596 - Acquired file lock at C:\Users\UserName\deno-issue-17246\node_modules\.deno\.deno.lock
DEBUG RS - deno::module_loader:197 - Prepared module load.
DEBUG RS - deno_core::runtime::bindings:298 - dyn_import specifier npm:node-mdaemon-api@23.0.0-alpha.21/index.cjs referrer file:///C:/Users/UserName/deno-issue-17246/test.ts
DEBUG RS - deno::npm::managed:297 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::managed:297 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::managed:297 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::managed:297 - Resolved package folder of node-mdaemon-api@23.0.0-alpha.21 to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::managed:518 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno::npm::managed:518 - Resolved package folder of file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs to C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api
DEBUG RS - deno_runtime::permissions:86 - ⚠️️  Granted ffi access to "C:\Users\UserName\deno-issue-17246\node_modules\.deno\node-mdaemon-api@23.0.0-alpha.21\node_modules\node-mdaemon-api\node-mdaemon-api.node"
error: Uncaught (in promise) TypeError: LoadLibraryExW failed
    at Object.Module._extensions..node (node:module:780:24)
    at Module.load (node:module:658:32)
    at Function.Module._load (node:module:539:12)
    at Module.require (node:module:677:19)
    at require (node:module:791:16)
    at Object.<anonymous> (file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs:2:12)
    at Object.<anonymous> (file:///C:/Users/UserName/deno-issue-17246/node_modules/.deno/node-mdaemon-api@23.0.0-alpha.21/node_modules/node-mdaemon-api/index.cjs:4:4)
    at Module._compile (node:module:733:34)
    at Object.Module._extensions..js (node:module:747:10)
    at Module.load (node:module:658:32)

c:\Users\UserName\deno-issue-17246>
ealib commented 8 months ago

See also #22652

ealib commented 5 months ago

Something changed recently, but it doesn't work yet. It seems that Deno tries to load a binary *.node file as a text file.

C:\deno-issue-17246>deno --version
deno 1.44.4 (release, x86_64-pc-windows-msvc)
v8 12.6.228.9
typescript 5.4.5

C:\deno-issue-17246>node --version
v20.15.0

C:\deno-issue-17246>yarn run start-node
yarn run v1.22.22
$ node test-native.js
{
  fileName: '\\\\?\\C:\\deno-issue-17246\\node_modules\\.deno\\node-mdaemon-api@24.0.0-alpha.32\\node_modules\\node-mdaemon-api\\node-mdaemon-api.node',
  isPrerelease: true,
  isFreeVersion: true,
  name: 'node-mdaemon-api',
  version: {
    full: '24.0.0-alpha.32',
    major: 24,
    minor: 0,
    release: 0,
    build: 173,
    tag: 'alpha.32'
  }
}
Done in 0.22s.

C:\deno-issue-17246>yarn run start-deno
yarn run v1.22.22
$ deno run --reload --allow-all test-native.ts
error: Unexpected character '�' at file:///C:/deno-issue-17246/node_modules/.deno/node-mdaemon-api@24.0.0-alpha.32/node_modules/node-mdaemon-api/node-mdaemon-api.node:1:3

  MZ�♥♦���@►☺♫▼�♫�      �!�☺L�!Th...
    ~
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

C:\deno-issue-17246>
ealib commented 1 month ago

I'm just checking whether it was left open by mistake:

C:\deno-issue-17246>deno --version 
deno 2.0.0 (stable, release, x86_64-pc-windows-msvc)
v8 12.9.202.13-rusty
typescript 5.6.2

C:\deno-issue-17246>node --version
v20.18.0

C:\deno-issue-17246>yarn start
yarn run v1.22.22
$ node native.js
{
  fileName: '\\\\?\\C:\\deno-issue-17246\\node_modules\\.deno\\node-mdaemon-api@24.0.2-alpha.34\\node_modules\\node-mdaemon-api\\node-mdaemon-api.node',
  isPrerelease: true,
  isFreeVersion: true,
  name: 'node-mdaemon-api',
  version: {
    full: '24.0.2-alpha.34',
    major: 24,
    minor: 0,
    release: 2,
    build: 232,
    tag: 'alpha.34'
  }
}
Done in 0.35s.

C:\deno-issue-17246>deno task start:debug
Task start:debug deno run --reload --allow-all --log-level debug native.ts
DEBUG RS - deno_config::deno_json:779 - Config file found at 'C:\deno-issue-17246\deno.json'
DEBUG RS - deno_config::workspace::discovery:266 - package.json file found at 'C:\deno-issue-17246\package.json'
DEBUG RS - deno::args:930 - Finished config loading.
DEBUG RS - deno::cache::cache_db:168 - Opening cache C:\Users\User\AppData\Local\deno\dep_analysis_cache_v2...
DEBUG RS - deno::cache::cache_db:168 - Opening cache C:\Users\User\AppData\Local\deno\node_analysis_cache_v2...
DEBUG RS - deno::cache::cache_db:168 - Opening cache C:\Users\User\AppData\Local\deno\v8_code_cache_v2...
DEBUG RS - deno_config::workspace::resolver:315 - Workspace config generated this import map {
  "imports": {
    "@std/assert": "jsr:@std/assert@1",
    "@std/assert/": "jsr:/@std/assert@1/"
  }
}
DEBUG RS - deno::js:10 - Deno isolate init with snapshots.
DEBUG RS - deno::worker:182 - main_module file:///C:/deno-issue-17246/native.ts
DEBUG RS - import_map:1110 - Specifier "file:///C:/deno-issue-17246/native.ts" was not mapped in import map.
DEBUG RS - import_map:1110 - Specifier "file:///C:/deno-issue-17246/native.ts" was not mapped in import map.
DEBUG RS - deno::module_loader:111 - Preparing module load.
DEBUG RS - deno::module_loader:135 - Building module graph.
DEBUG RS - deno::file_fetcher:622 - FileFetcher::fetch_no_follow_with_options - specifier: file:///C:/deno-issue-17246/native.ts
DEBUG RS - import_map:1110 - Specifier "npm:node-mdaemon-api" was not mapped in import map.
DEBUG RS - deno::module_loader:181 - Prepared module load.
DEBUG RS - import_map:1110 - Specifier "file:///C:/deno-issue-17246/native.ts" was not mapped in import map.
error: Expected ';', '}' or <eof> at file:///C:/deno-issue-17246/node_modules/.deno/node-mdaemon-api@24.0.2-alpha.34/node_modules/node-mdaemon-api/node-mdaemon-api.node:1:3

  MZ�♥♦���@►☺♫▼�♫�      �!�☺L�!Th...
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