node:zlib implem: Expose zlib.constants

src/node/internal/internal_zlib.ts

@@ -1,6 +1,6 @@
 import { default as zlibUtil } from 'node-internal:zlib';
 import { Buffer } from 'node-internal:internal_buffer';
-import { validateUint32  } from 'node-internal:validators';
+import { validateUint32 } from 'node-internal:validators';
 import { isArrayBufferView } from 'node-internal:internal_types';
 import { ERR_INVALID_ARG_TYPE } from 'node-internal:internal_errors';
 
@@ -14,6 +14,22 @@ function crc32(data: ArrayBufferView | string, value: number = 0): number {
   return zlibUtil.crc32(data, value);
 }
 
+
+const constPrefix = 'CONST_'; 
+const constants = {};
+
+// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+Object.defineProperties(constants, Object.fromEntries(Object.entries(Object.getPrototypeOf(zlibUtil))
+  .filter(([k,]) => k.startsWith(constPrefix))
+  .map(([k, v]) => [k.slice(constPrefix.length), {
+    value: v,
+    writable: false,
+    configurable: false,
+    enumerable: true
+  }])
+));
+
 export {
   crc32,
+  constants,
 }

src/node/internal/zlib.d.ts

@@ -1 +1,115 @@
 export function crc32(data: ArrayBufferView, value: number): number;
+
+// zlib.constants (part of the API contract for node:zlib)
+export const CONST_Z_NO_FLUSH: number;
+export const CONST_Z_PARTIAL_FLUSH: number;
+export const CONST_Z_SYNC_FLUSH: number;
+export const CONST_Z_FULL_FLUSH: number;
+export const CONST_Z_FINISH: number;
+export const CONST_Z_BLOCK: number;
+
+export const CONST_Z_OK: number;
+export const CONST_Z_STREAM_END: number;
+export const CONST_Z_NEED_DICT: number;
+export const CONST_Z_ERRNO: number;
+export const CONST_Z_STREAM_ERROR: number;
+export const CONST_Z_DATA_ERROR: number;
+export const CONST_Z_MEM_ERROR: number;
+export const CONST_Z_BUF_ERROR: number;
+export const CONST_Z_VERSION_ERROR: number;
+
+export const CONST_Z_NO_COMPRESSION: number;
+export const CONST_Z_BEST_SPEED: number;
+export const CONST_Z_BEST_COMPRESSION: number;
+export const CONST_Z_DEFAULT_COMPRESSION: number;
+export const CONST_Z_FILTERED: number;
+export const CONST_Z_HUFFMAN_ONLY: number;
+export const CONST_Z_RLE: number;
+export const CONST_Z_FIXED: number;
+export const CONST_Z_DEFAULT_STRATEGY: number;
+export const CONST_ZLIB_VERNUM: number;
+
+export const CONST_DEFLATE: number;
+export const CONST_INFLATE: number;
+export const CONST_GZIP: number;
+export const CONST_GUNZIP: number;
+export const CONST_DEFLATERAW: number;
+export const CONST_INFLATERAW: number;
+export const CONST_UNZIP: number;
+export const CONST_BROTLI_DECODE: number;
+export const CONST_BROTLI_ENCODE: number;
+
+export const CONST_Z_MIN_WINDOWBITS: number;
+export const CONST_Z_MAX_WINDOWBITS: number;
+export const CONST_Z_DEFAULT_WINDOWBITS: number;
+export const CONST_Z_MIN_CHUNK: number;
+export const CONST_Z_MAX_CHUNK: number;
+export const CONST_Z_DEFAULT_CHUNK: number;
+export const CONST_Z_MIN_MEMLEVEL: number;
+export const CONST_Z_MAX_MEMLEVEL: number;
+export const CONST_Z_DEFAULT_MEMLEVEL: number;
+export const CONST_Z_MIN_LEVEL: number;
+export const CONST_Z_MAX_LEVEL: number;
+export const CONST_Z_DEFAULT_LEVEL: number;
+
+export const CONST_BROTLI_OPERATION_PROCESS: number;
+export const CONST_BROTLI_OPERATION_FLUSH: number;
+export const CONST_BROTLI_OPERATION_FINISH: number;
+export const CONST_BROTLI_OPERATION_EMIT_METADATA: number;
+export const CONST_BROTLI_PARAM_MODE: number;
+export const CONST_BROTLI_MODE_GENERIC: number;
+export const CONST_BROTLI_MODE_TEXT: number;
+export const CONST_BROTLI_MODE_FONT: number;
+export const CONST_BROTLI_DEFAULT_MODE: number;
+export const CONST_BROTLI_PARAM_QUALITY: number;
+export const CONST_BROTLI_MIN_QUALITY: number;
+export const CONST_BROTLI_MAX_QUALITY: number;
+export const CONST_BROTLI_DEFAULT_QUALITY: number;
+export const CONST_BROTLI_PARAM_LGWIN: number;
+export const CONST_BROTLI_MIN_WINDOW_BITS: number;
+export const CONST_BROTLI_MAX_WINDOW_BITS: number;
+export const CONST_BROTLI_LARGE_MAX_WINDOW_BITS: number;
+export const CONST_BROTLI_DEFAULT_WINDOW: number;
+export const CONST_BROTLI_PARAM_LGBLOCK: number;
+export const CONST_BROTLI_MIN_INPUT_BLOCK_BITS: number;
+export const CONST_BROTLI_MAX_INPUT_BLOCK_BITS: number;
+export const CONST_BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING: number;
+export const CONST_BROTLI_PARAM_SIZE_HINT: number;
+export const CONST_BROTLI_PARAM_LARGE_WINDOW: number;
+export const CONST_BROTLI_PARAM_NPOSTFIX: number;
+export const CONST_BROTLI_PARAM_NDIRECT: number;
+export const CONST_BROTLI_DECODER_RESULT_ERROR: number;
+export const CONST_BROTLI_DECODER_RESULT_SUCCESS: number;
+export const CONST_BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: number;
+export const CONST_BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: number;
+export const CONST_BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: number;
+export const CONST_BROTLI_DECODER_PARAM_LARGE_WINDOW: number;
+export const CONST_BROTLI_DECODER_NO_ERROR: number;
+export const CONST_BROTLI_DECODER_SUCCESS: number;
+export const CONST_BROTLI_DECODER_NEEDS_MORE_INPUT: number;
+export const CONST_BROTLI_DECODER_NEEDS_MORE_OUTPUT: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_RESERVED: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_CL_SPACE: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_TRANSFORM: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_DICTIONARY: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_PADDING_1: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_PADDING_2: number;
+export const CONST_BROTLI_DECODER_ERROR_FORMAT_DISTANCE: number;
+export const CONST_BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET: number;
+export const CONST_BROTLI_DECODER_ERROR_INVALID_ARGUMENTS: number;
+export const CONST_BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES: number;
+export const CONST_BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS: number;
+export const CONST_BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP: number;
+export const CONST_BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1: number;
+export const CONST_BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2: number;
+export const CONST_BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES: number;
+export const CONST_BROTLI_DECODER_ERROR_UNREACHABLE: number;

src/node/zlib.ts

@@ -1,9 +1,11 @@
-import { crc32 } from 'node-internal:internal_zlib';
+import { crc32, constants } from 'node-internal:internal_zlib';
 
 export {
   crc32,
+  constants,
 }
 
 export default {
   crc32,
+  constants,
 }

src/workerd/api/node/BUILD.bazel

@@ -8,14 +8,14 @@ wd_cc_library(
     hdrs = glob(["**/*.h"]),
     implementation_deps = [
         "//src/workerd/util:perfetto",
-        "@capnp-cpp//src/kj/compat:kj-brotli",
         "@capnp-cpp//src/kj/compat:kj-gzip",
         "@simdutf",
         "@nbytes",
     ],
     visibility = ["//visibility:public"],
     deps = [
         "//src/workerd/io",
+        "@capnp-cpp//src/kj/compat:kj-brotli",
     ],
 )
 

src/workerd/api/node/tests/zlib-nodejs-test.js

@@ -1,9 +1,10 @@
 import {
   strictEqual,
   throws,
+    deepStrictEqual
 } from 'node:assert';
 import { Buffer } from 'node:buffer';
-import { crc32 } from 'node:zlib';
+import { crc32, constants } from 'node:zlib';
 
 
 // The following test data comes from
@@ -213,3 +214,117 @@ export const crc32Test = {
     });
   }
 }
+
+export const constantsTest = {
+  test() {
+    deepStrictEqual(Object.keys(constants).sort(), [
+      "BROTLI_DECODE",
+      "BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES",
+      "BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP",
+      "BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES",
+      "BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1",
+      "BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2",
+      "BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS",
+      "BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET",
+      "BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1",
+      "BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2",
+      "BROTLI_DECODER_ERROR_FORMAT_CL_SPACE",
+      "BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT",
+      "BROTLI_DECODER_ERROR_FORMAT_DICTIONARY",
+      "BROTLI_DECODER_ERROR_FORMAT_DISTANCE",
+      "BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE",
+      "BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE",
+      "BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE",
+      "BROTLI_DECODER_ERROR_FORMAT_PADDING_1",
+      "BROTLI_DECODER_ERROR_FORMAT_PADDING_2",
+      "BROTLI_DECODER_ERROR_FORMAT_RESERVED",
+      "BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET",
+      "BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME",
+      "BROTLI_DECODER_ERROR_FORMAT_TRANSFORM",
+      "BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS",
+      "BROTLI_DECODER_ERROR_INVALID_ARGUMENTS",
+      "BROTLI_DECODER_ERROR_UNREACHABLE",
+      "BROTLI_DECODER_NEEDS_MORE_INPUT",
+      "BROTLI_DECODER_NEEDS_MORE_OUTPUT",
+      "BROTLI_DECODER_NO_ERROR",
+      "BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION",
+      "BROTLI_DECODER_PARAM_LARGE_WINDOW",
+      "BROTLI_DECODER_RESULT_ERROR",
+      "BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT",
+      "BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT",
+      "BROTLI_DECODER_RESULT_SUCCESS",
+      "BROTLI_DECODER_SUCCESS",
+      "BROTLI_DEFAULT_MODE",
+      "BROTLI_DEFAULT_QUALITY",
+      "BROTLI_DEFAULT_WINDOW",
+      "BROTLI_ENCODE",
+      "BROTLI_LARGE_MAX_WINDOW_BITS",
+      "BROTLI_MAX_INPUT_BLOCK_BITS",
+      "BROTLI_MAX_QUALITY",
+      "BROTLI_MAX_WINDOW_BITS",
+      "BROTLI_MIN_INPUT_BLOCK_BITS",
+      "BROTLI_MIN_QUALITY",
+      "BROTLI_MIN_WINDOW_BITS",
+      "BROTLI_MODE_FONT",
+      "BROTLI_MODE_GENERIC",
+      "BROTLI_MODE_TEXT",
+      "BROTLI_OPERATION_EMIT_METADATA",
+      "BROTLI_OPERATION_FINISH",
+      "BROTLI_OPERATION_FLUSH",
+      "BROTLI_OPERATION_PROCESS",
+      "BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING",
+      "BROTLI_PARAM_LARGE_WINDOW",
+      "BROTLI_PARAM_LGBLOCK",
+      "BROTLI_PARAM_LGWIN",
+      "BROTLI_PARAM_MODE",
+      "BROTLI_PARAM_NDIRECT",
+      "BROTLI_PARAM_NPOSTFIX",
+      "BROTLI_PARAM_QUALITY",
+      "BROTLI_PARAM_SIZE_HINT",
+      "DEFLATE",
+      "DEFLATERAW",
+      "GUNZIP",
+      "GZIP",
+      "INFLATE",
+      "INFLATERAW",
+      "UNZIP",
+      "ZLIB_VERNUM",
+      "Z_BEST_COMPRESSION",
+      "Z_BEST_SPEED",
+      "Z_BLOCK",
+      "Z_BUF_ERROR",
+      "Z_DATA_ERROR",
+      "Z_DEFAULT_CHUNK",
+      "Z_DEFAULT_COMPRESSION",
+      "Z_DEFAULT_LEVEL",
+      "Z_DEFAULT_MEMLEVEL",
+      "Z_DEFAULT_STRATEGY",
+      "Z_DEFAULT_WINDOWBITS",
+      "Z_ERRNO",
+      "Z_FILTERED",
+      "Z_FINISH",
+      "Z_FIXED",
+      "Z_FULL_FLUSH",
+      "Z_HUFFMAN_ONLY",
+      "Z_MAX_CHUNK",
+      "Z_MAX_LEVEL",
+      "Z_MAX_MEMLEVEL",
+      "Z_MAX_WINDOWBITS",
+      "Z_MEM_ERROR",
+      "Z_MIN_CHUNK",
+      "Z_MIN_LEVEL",
+      "Z_MIN_MEMLEVEL",
+      "Z_MIN_WINDOWBITS",
+      "Z_NEED_DICT",
+      "Z_NO_COMPRESSION",
+      "Z_NO_FLUSH",
+      "Z_OK",
+      "Z_PARTIAL_FLUSH",
+      "Z_RLE",
+      "Z_STREAM_END",
+      "Z_STREAM_ERROR",
+      "Z_SYNC_FLUSH",
+      "Z_VERSION_ERROR"
+    ]);
+ }
+}

src/workerd/api/node/zlib-util.c++

@@ -3,13 +3,9 @@
 //     https://opensource.org/licenses/Apache-2.0
 #include "zlib-util.h"
 
-#include "zlib.h"
-
 namespace workerd::api::node {
-
 uint32_t ZlibUtil::crc32Sync(kj::Array<kj::byte> data, uint32_t value) {
   // Note: Bytef is defined in zlib.h
   return crc32(value, reinterpret_cast<const Bytef*>(data.begin()), data.size());
 }
-
 } // namespace workerd::api::node