@zip.js/zip.js
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    Class Reader<Type>

    Represents an instance used to read unknown type of data.

    Here is an example of custom Reader class used to read binary strings:

    class BinaryStringReader extends Reader {

      constructor(binaryString) {
        super();
        this.binaryString = binaryString;
      }

      init() {
        super.init();
        this.size = this.binaryString.length;
      }

      readUint8Array(offset, length) {
        const result = new Uint8Array(length);
        for (let indexCharacter = 0; indexCharacter < length; indexCharacter++) {
          result[indexCharacter] = this.binaryString.charCodeAt(indexCharacter + offset) & 0xFF;
        }
        return result;
      }
    }

    Type Parameters

    • Type

    Hierarchy (View Summary)

    Implements

    Index
    constructor
    readable size
    createReadable init? readUint8Array
    readable: ReadableStream

    The ReadableStream instance.

    size: number

    The total size of the data in bytes.

    • Creates a ReadableStream of the data, optionally restricted to a byte range.

      The default implementation reads the data with Reader#readUint8Array. Custom readers can override this method to return a stream provided natively by the underlying data source.

      Parameters

      Returns ReadableStream<Uint8Array<ArrayBufferLike>>

      The ReadableStream instance.

    • Reads a chunk of data

      Parameters

      • index: number

        The byte index of the data to read.

      • length: number

        The length of the data to read in bytes.

      Returns Promise<Uint8Array<ArrayBufferLike>>

      A promise resolving to a chunk of data. The data must be trucated to the remaining size if the requested length is larger than the remaining size.

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