129 lines
3.9 KiB
JavaScript
129 lines
3.9 KiB
JavaScript
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var Int64 = require('./int64').Int64;
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var splitMessage = require('./split-message').splitMessage;
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var BOOLEAN_TAG = 'boolean';
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var BYTE_TAG = 'byte';
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var SHORT_TAG = 'short';
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var INT_TAG = 'integer';
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var LONG_TAG = 'long';
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var BINARY_TAG = 'binary';
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var STRING_TAG = 'string';
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var TIMESTAMP_TAG = 'timestamp';
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var UUID_TAG = 'uuid';
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/**
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* @api private
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*
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* @param {Buffer} headers
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*/
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function parseHeaders(headers) {
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var out = {};
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var position = 0;
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while (position < headers.length) {
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var nameLength = headers.readUInt8(position++);
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var name = headers.slice(position, position + nameLength).toString();
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position += nameLength;
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switch (headers.readUInt8(position++)) {
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case 0 /* boolTrue */:
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out[name] = {
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type: BOOLEAN_TAG,
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value: true
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};
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break;
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case 1 /* boolFalse */:
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out[name] = {
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type: BOOLEAN_TAG,
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value: false
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};
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break;
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case 2 /* byte */:
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out[name] = {
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type: BYTE_TAG,
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value: headers.readInt8(position++)
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};
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break;
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case 3 /* short */:
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out[name] = {
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type: SHORT_TAG,
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value: headers.readInt16BE(position)
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};
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position += 2;
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break;
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case 4 /* integer */:
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out[name] = {
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type: INT_TAG,
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value: headers.readInt32BE(position)
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};
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position += 4;
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break;
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case 5 /* long */:
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out[name] = {
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type: LONG_TAG,
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value: new Int64(headers.slice(position, position + 8))
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};
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position += 8;
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break;
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case 6 /* byteArray */:
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var binaryLength = headers.readUInt16BE(position);
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position += 2;
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out[name] = {
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type: BINARY_TAG,
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value: headers.slice(position, position + binaryLength)
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};
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position += binaryLength;
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break;
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case 7 /* string */:
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var stringLength = headers.readUInt16BE(position);
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position += 2;
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out[name] = {
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type: STRING_TAG,
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value: headers.slice(
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position,
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position + stringLength
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).toString()
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};
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position += stringLength;
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break;
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case 8 /* timestamp */:
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out[name] = {
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type: TIMESTAMP_TAG,
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value: new Date(
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new Int64(headers.slice(position, position + 8))
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.valueOf()
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)
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};
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position += 8;
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break;
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case 9 /* uuid */:
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var uuidChars = headers.slice(position, position + 16)
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.toString('hex');
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position += 16;
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out[name] = {
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type: UUID_TAG,
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value: uuidChars.substr(0, 8) + '-' +
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uuidChars.substr(8, 4) + '-' +
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uuidChars.substr(12, 4) + '-' +
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uuidChars.substr(16, 4) + '-' +
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uuidChars.substr(20)
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};
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break;
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default:
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throw new Error('Unrecognized header type tag');
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}
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}
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return out;
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}
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function parseMessage(message) {
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var parsed = splitMessage(message);
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return { headers: parseHeaders(parsed.headers), body: parsed.body };
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}
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/**
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* @api private
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*/
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module.exports = {
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parseMessage: parseMessage
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};
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