@loaders.gl/zip - npm Package Compare versions

Comparing version 4.0.4 to 4.1.0-alpha.1

dist/index.d.ts

 export { ZipLoader } from './zip-loader';
 export { ZipWriter } from './zip-writer';
 export { TarBuilder } from './tar-builder';
-export { parseZipCDFileHeader, makeZipCDHeaderIterator, signature as cdSignature } from './parse-zip/cd-file-header';
+export { parseZipCDFileHeader, makeZipCDHeaderIterator, signature as CD_HEADER_SIGNATURE, generateCDHeader } from './parse-zip/cd-file-header';
 export { parseZipLocalFileHeader, signature as localHeaderSignature } from './parse-zip/local-file-header';
@@ -6,0 +6,0 @@ export { parseEoCDRecord } from './parse-zip/end-of-central-directory';

dist/index.js

 export { ZipLoader } from "./zip-loader.js";
 export { ZipWriter } from "./zip-writer.js";
 export { TarBuilder } from "./tar-builder.js";
-export { parseZipCDFileHeader, makeZipCDHeaderIterator, signature as cdSignature } from "./parse-zip/cd-file-header.js";
+export { parseZipCDFileHeader, makeZipCDHeaderIterator, signature as CD_HEADER_SIGNATURE, generateCDHeader } from "./parse-zip/cd-file-header.js";
 export { parseZipLocalFileHeader, signature as localHeaderSignature } from "./parse-zip/local-file-header.js";
@@ -6,0 +6,0 @@ export { parseEoCDRecord } from "./parse-zip/end-of-central-directory.js";

dist/parse-zip/cd-file-header.d.ts

@@ -36,2 +36,20 @@ import { FileProvider } from '@loaders.gl/loader-utils';
 export declare function makeZipCDHeaderIterator(fileProvider: FileProvider): AsyncIterable<ZipCDFileHeader>;
+/** info that can be placed into cd header */
+type GenerateCDOptions = {
+    /** CRC-32 of uncompressed data */
+    crc32: number;
+    /** File name */
+    fileName: string;
+    /** File size */
+    length: number;
+    /** Relative offset of local file header */
+    offset: number;
+};
+/**
+ * generates cd header for the file
+ * @param options info that can be placed into cd header
+ * @returns buffer with header
+ */
+export declare function generateCDHeader(options: GenerateCDOptions): ArrayBuffer;
+export {};
 //# sourceMappingURL=cd-file-header.d.ts.map

dist/parse-zip/cd-file-header.js

@@ -1,3 +0,4 @@
-import { compareArrayBuffers } from '@loaders.gl/loader-utils';
+import { compareArrayBuffers, concatenateArrayBuffers } from '@loaders.gl/loader-utils';
 import { parseEoCDRecord } from "./end-of-central-directory.js";
+import { createZip64Info, NUMBER_SETTERS } from "./zip64-info-generation.js";
 const CD_COMPRESSED_SIZE_OFFSET = 20n;
@@ -99,2 +100,101 @@ const CD_UNCOMPRESSED_SIZE_OFFSET = 24n;
 };
+export function generateCDHeader(options) {
+  const optionsToUse = {
+    ...options,
+    fnlength: options.fileName.length,
+    extraLength: 0
+  };
+  let zip64header = new ArrayBuffer(0);
+  const optionsToZip64 = {};
+  if (optionsToUse.offset >= 0xffffffff) {
+    optionsToZip64.offset = optionsToUse.offset;
+    optionsToUse.offset = 0xffffffff;
+  }
+  if (optionsToUse.length >= 0xffffffff) {
+    optionsToZip64.size = optionsToUse.length;
+    optionsToUse.length = 0xffffffff;
+  }
+  if (Object.keys(optionsToZip64).length) {
+    zip64header = createZip64Info(optionsToZip64);
+    optionsToUse.extraLength = zip64header.byteLength;
+  }
+  const header = new DataView(new ArrayBuffer(46));
+  for (const field of ZIP_HEADER_FIELDS) {
+    var _ref, _optionsToUse, _field$name;
+    NUMBER_SETTERS[field.size](header, field.offset, (_ref = (_optionsToUse = optionsToUse[(_field$name = field.name) !== null && _field$name !== void 0 ? _field$name : '']) !== null && _optionsToUse !== void 0 ? _optionsToUse : field.default) !== null && _ref !== void 0 ? _ref : 0);
+  }
+  const encodedName = new TextEncoder().encode(optionsToUse.fileName);
+  const resHeader = concatenateArrayBuffers(header.buffer, encodedName, zip64header);
+  return resHeader;
+}
+const ZIP_HEADER_FIELDS = [{
+  offset: 0,
+  size: 4,
+  default: new DataView(signature.buffer).getUint32(0, true)
+}, {
+  offset: 4,
+  size: 2,
+  default: 45
+}, {
+  offset: 6,
+  size: 2,
+  default: 45
+}, {
+  offset: 8,
+  size: 2,
+  default: 0
+}, {
+  offset: 10,
+  size: 2,
+  default: 0
+}, {
+  offset: 12,
+  size: 2,
+  default: 0
+}, {
+  offset: 14,
+  size: 2,
+  default: 0
+}, {
+  offset: 16,
+  size: 4,
+  name: 'crc32'
+}, {
+  offset: 20,
+  size: 4,
+  name: 'length'
+}, {
+  offset: 24,
+  size: 4,
+  name: 'length'
+}, {
+  offset: 28,
+  size: 2,
+  name: 'fnlength'
+}, {
+  offset: 30,
+  size: 2,
+  default: 0,
+  name: 'extraLength'
+}, {
+  offset: 32,
+  size: 2,
+  default: 0
+}, {
+  offset: 34,
+  size: 2,
+  default: 0
+}, {
+  offset: 36,
+  size: 2,
+  default: 0
+}, {
+  offset: 38,
+  size: 4,
+  default: 0
+}, {
+  offset: 42,
+  size: 4,
+  name: 'offset'
+}];
 //# sourceMappingURL=cd-file-header.js.map

package.json

 {
   "name": "@loaders.gl/zip",
-  "version": "4.0.4",
+  "version": "4.1.0-alpha.1",
   "description": "Zip Archive Loader",
@@ -41,9 +41,9 @@ "license": "MIT",
   "dependencies": {
-    "@loaders.gl/compression": "4.0.4",
-    "@loaders.gl/crypto": "4.0.4",
-    "@loaders.gl/loader-utils": "4.0.4",
+    "@loaders.gl/compression": "4.1.0-alpha.1",
+    "@loaders.gl/crypto": "4.1.0-alpha.1",
+    "@loaders.gl/loader-utils": "4.1.0-alpha.1",
     "jszip": "^3.1.5",
     "md5": "^2.3.0"
   },
-  "gitHead": "4dc810fa04bb400f4aedfef98a83c7ef882ed3d7"
+  "gitHead": "6a4d3da93d45115ad99861474a43c3f4a0b280a7"
 }

src/index.ts

@@ -11,3 +11,4 @@ // loaders.gl, MIT license
   makeZipCDHeaderIterator,
-  signature as cdSignature
+  signature as CD_HEADER_SIGNATURE,
+  generateCDHeader
 } from './parse-zip/cd-file-header';
@@ -14,0 +15,0 @@ export {

src/parse-zip/cd-file-header.ts

 // loaders.gl, MIT license
 // Copyright (c) vis.gl contributors
 
-import {FileProvider, compareArrayBuffers} from '@loaders.gl/loader-utils';
+import {FileProvider, compareArrayBuffers, concatenateArrayBuffers} from '@loaders.gl/loader-utils';
 import {parseEoCDRecord} from './end-of-central-directory';
 import {ZipSignature} from './search-from-the-end';
+import {createZip64Info, NUMBER_SETTERS} from './zip64-info-generation';
 
@@ -191,1 +192,181 @@ /**
 };
+
+/** info that can be placed into cd header */
+type GenerateCDOptions = {
+  /** CRC-32 of uncompressed data */
+  crc32: number;
+  /** File name */
+  fileName: string;
+  /** File size */
+  length: number;
+  /** Relative offset of local file header */
+  offset: number;
+};
+
+/**
+ * generates cd header for the file
+ * @param options info that can be placed into cd header
+ * @returns buffer with header
+ */
+export function generateCDHeader(options: GenerateCDOptions): ArrayBuffer {
+  const optionsToUse = {
+    ...options,
+    fnlength: options.fileName.length,
+    extraLength: 0
+  };
+
+  let zip64header: ArrayBuffer = new ArrayBuffer(0);
+
+  const optionsToZip64: any = {};
+  if (optionsToUse.offset >= 0xffffffff) {
+    optionsToZip64.offset = optionsToUse.offset;
+    optionsToUse.offset = 0xffffffff;
+  }
+  if (optionsToUse.length >= 0xffffffff) {
+    optionsToZip64.size = optionsToUse.length;
+    optionsToUse.length = 0xffffffff;
+  }
+
+  if (Object.keys(optionsToZip64).length) {
+    zip64header = createZip64Info(optionsToZip64);
+    optionsToUse.extraLength = zip64header.byteLength;
+  }
+  const header = new DataView(new ArrayBuffer(46));
+
+  for (const field of ZIP_HEADER_FIELDS) {
+    NUMBER_SETTERS[field.size](
+      header,
+      field.offset,
+      optionsToUse[field.name ?? ''] ?? field.default ?? 0
+    );
+  }
+
+  const encodedName = new TextEncoder().encode(optionsToUse.fileName);
+
+  const resHeader = concatenateArrayBuffers(header.buffer, encodedName, zip64header);
+
+  return resHeader;
+}
+
+/** Fields map */
+const ZIP_HEADER_FIELDS = [
+  // Central directory file header signature = 0x02014b50
+  {
+    offset: 0,
+    size: 4,
+    default: new DataView(signature.buffer).getUint32(0, true)
+  },
+
+  // Version made by
+  {
+    offset: 4,
+    size: 2,
+    default: 45
+  },
+
+  // Version needed to extract (minimum)
+  {
+    offset: 6,
+    size: 2,
+    default: 45
+  },
+
+  // General purpose bit flag
+  {
+    offset: 8,
+    size: 2,
+    default: 0
+  },
+
+  // Compression method
+  {
+    offset: 10,
+    size: 2,
+    default: 0
+  },
+
+  // File last modification time
+  {
+    offset: 12,
+    size: 2,
+    default: 0
+  },
+
+  // File last modification date
+  {
+    offset: 14,
+    size: 2,
+    default: 0
+  },
+
+  // CRC-32 of uncompressed data
+  {
+    offset: 16,
+    size: 4,
+    name: 'crc32'
+  },
+
+  // Compressed size (or 0xffffffff for ZIP64)
+  {
+    offset: 20,
+    size: 4,
+    name: 'length'
+  },
+
+  // Uncompressed size (or 0xffffffff for ZIP64)
+  {
+    offset: 24,
+    size: 4,
+    name: 'length'
+  },
+
+  // File name length (n)
+  {
+    offset: 28,
+    size: 2,
+    name: 'fnlength'
+  },
+
+  // Extra field length (m)
+  {
+    offset: 30,
+    size: 2,
+    default: 0,
+    name: 'extraLength'
+  },
+
+  // File comment length (k)
+  {
+    offset: 32,
+    size: 2,
+    default: 0
+  },
+
+  // Disk number where file starts (or 0xffff for ZIP64)
+  {
+    offset: 34,
+    size: 2,
+    default: 0
+  },
+
+  // Internal file attributes
+  {
+    offset: 36,
+    size: 2,
+    default: 0
+  },
+
+  // External file attributes
+  {
+    offset: 38,
+    size: 4,
+    default: 0
+  },
+
+  // Relative offset of local file header
+  {
+    offset: 42,
+    size: 4,
+    name: 'offset'
+  }
+];

New alerts

No v1

Quality

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

552466

increased by5.87%

Number of package files

80

increased by6.67%

Lines of code

11756

increased by6.93%

Worsened metrics

Number of low quality alerts

2

increased by100%

Dependency changes

• + [e-mail]/compression@4.1.0-alpha.1(transitive)

• + [e-mail]/crypto@4.1.0-alpha.1(transitive)

• + [e-mail]/loader-utils@4.1.0-alpha.1(transitive)

• + [e-mail]/worker-utils@4.1.0-alpha.1(transitive)

• - [e-mail]/compression@4.0.4(transitive)

• - [e-mail]/crypto@4.0.4(transitive)

• - [e-mail]/loader-utils@4.0.4(transitive)

• - [e-mail]/worker-utils@4.0.4(transitive)

• [e-mail]/compression@4.1.0-alpha.1

• [e-mail]/crypto@4.1.0-alpha.1

• [e-mail]/loader-utils@4.1.0-alpha.1