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Original file line number | Diff line number | Diff line change |
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@@ -1,41 +1,86 @@ | ||
'use strict'; | ||
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const PROTOCOL_VERSION = 1; | ||
const HANDSHAKE_LENGTH = 36; | ||
const PARCEL_LENGTH = 16; | ||
const CHUNK_LENGTH = 12; | ||
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const parcel = (buffer) => { | ||
const readParcel = (buffer) => { | ||
// Read parcel from buffer | ||
// Return parcel object | ||
const rest = Buffer.from(buffer, 1, PARCEL_LENGTH); | ||
return rest; | ||
}; | ||
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const chunk = (buffer) => { | ||
const parcel = ( | ||
// Encode parcel structure to Buffer | ||
// id, // parcelId: 4b | ||
// type, // parcelType: 4b | ||
// compression, // 1b: no = 0, gzip = 1 | ||
// encoding, // 1b: binary = 0, jstp = 1, json = 2, bson = 3, v8 = 4 | ||
// length // 8b | ||
) => { | ||
const parcel = Buffer.alloc(PARCEL_LENGTH); | ||
parcel.writeInt8(0, 0); | ||
// Write parcel fields to buffer | ||
return parcel; | ||
}; | ||
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const readChunk = (buffer) => { | ||
// Read chunkk from buffer | ||
// Return chunk object | ||
const rest = Buffer.from(buffer, 1, CHUNK_LENGTH); | ||
return rest; | ||
}; | ||
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const handshake = (buffer) => { | ||
const chunk = ( | ||
// Encode chunk structure to Buffer | ||
// id, // parcelId: 4b | ||
// flags, // 1b: more = 1, stop = 2, pause = 4, resume = 8 | ||
// length, // 2b | ||
// payload // Buffer | ||
) => { | ||
const chunk = Buffer.alloc(CHUNK_LENGTH); | ||
chunk.writeInt8(1, 0); | ||
// Write chunk fields to buffer | ||
return chunk; | ||
}; | ||
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const readHandshake = (buffer) => { | ||
// Read handshake from buffer | ||
// Return handshake object | ||
const rest = Buffer.from(buffer, 0, HANDSHAKE_LENGTH); | ||
return rest; | ||
}; | ||
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const handshake = ( | ||
// Encode handshake structure to Buffer | ||
// status // 1b: 0 = new, 1 = restore | ||
// reserved // 1b | ||
// token // 32b (optional) | ||
) => { | ||
const handshake = Buffer.alloc(HANDSHAKE_LENGTH); | ||
handshake.writeInt16LE(PROTOCOL_VERSION, 0); | ||
// Write handshake to buffer | ||
return handshake; | ||
}; | ||
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const structTypes = [ | ||
/* 0 */ parcel, | ||
/* 1 */ chunk | ||
/* 0 */ readParcel, | ||
/* 1 */ readChunk | ||
]; | ||
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const structure = (buffer) => { | ||
const readStruct = (buffer) => { | ||
// Read structure from buffer | ||
// Return parcel or chunk object | ||
const structType = buffer.readInt8(0, true); | ||
const parser = structTypes[structType]; | ||
if (parser) return parser(buffer); | ||
}; | ||
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module.exports = { structure, handshake, chunk, parcel }; | ||
module.exports = { | ||
handshake, readHandshake, | ||
chunk, readChunk, | ||
parcel, readParcel, | ||
readStruct | ||
}; |