Core of node-wot

The core of node-wot is the entry point allowing to attach dedicated bindings such as:

or to create user-specific bindings.

Current Maintainer(s): @danielpeintner @relu91 @JKRhb

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- npm install @node-wot/core

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see binding examples such as

- https://github.com/eclipse-thingweb/node-wot/blob/master/packages/binding-http
- https://github.com/eclipse-thingweb/node-wot/blob/master/packages/binding-coap

Codecs

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The octet-stream codec enables deserialization and serialization of binary data. To encode and decode sequences of bytes, the octet-stream codec uses the following content type parameters:
| Parameter | Description | Default |
| --- | --- | --- |
| length | Number of bytes produced during serialization or consumed during deserialization | |
| signed | Signedness of the data type, true or false | true |
| byteSeq | Endianness, enum of BIG_ENDIAN, LITTLE_ENDIAN, BIG_ENDIAN_BYTE_SWAP, LITTLE_ENDIAN_BYTE_SWAP | BIG_ENDIAN |

Additionally, the octet-stream codec supports the data schema terms below for addressing bit-fields:
| Term | Description | Default |
| --- | --- | --- |
| ex:bitLength | Number of bits produced during serialization or consumed during deserialization | |
| ex:bitOffset | Offset in bits from the beginning of the byte sequence | 0 |

With the help of the terms and parameters above, the octet-stream codec can be used to serialize and deserialize objects containing bit-fields and sequences of bytes, like in the following example.

#### Example

To serialize the object { flag1: true, numberProperty: 99, stringProperty: "Web" } to a sequence of bytes, the content type application/octet-stream;length=4;signed=false;, along with the following data schema can be used:

``json { "type": "object", "properties": { "flag1": { "type": "boolean", "ex:bitOffset": 0, "ex:bitLength": 1 }, "numberProperty": { "type": "integer", "ex:bitOffset": 1, "ex:bitLength": 7 }, "stringProperty": { "type": "string", "ex:bitOffset": 8, "ex:bitLength": 24 } } }``

More Details

See