forked from zhurui/management
44 lines
964 B
JavaScript
44 lines
964 B
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = readBuffer;
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function readBuffer(pipe, length, callback) {
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if (length === 0) {
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callback(null, Buffer.alloc(0));
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return;
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}
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let remainingLength = length;
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const buffers = [];
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const readChunk = () => {
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const onChunk = arg => {
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let chunk = arg;
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let overflow;
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if (chunk.length > remainingLength) {
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overflow = chunk.slice(remainingLength);
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chunk = chunk.slice(0, remainingLength);
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remainingLength = 0;
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} else {
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remainingLength -= chunk.length;
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}
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buffers.push(chunk);
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if (remainingLength === 0) {
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pipe.removeListener('data', onChunk);
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pipe.pause();
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if (overflow) {
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pipe.unshift(overflow);
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}
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callback(null, Buffer.concat(buffers, length));
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}
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};
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pipe.on('data', onChunk);
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pipe.resume();
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};
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readChunk();
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}
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