How to deserialize avro in nodejs?

Question

I have an avro file. I want to use nodejs to open and read its schema and iterate through its records. How to do this? The avro libraries I see in nodejs appear to require you to pass in a schema instead of getting the schema out of the .avro file. Also, I want to be able to support arrays, which there does not seem to exist a node library that does (node-avro-io).

My avro/avroschema Contains:

1. A nested field {a:{suba: vala, subb: vala}}.
2. An array field {a:["A","B"]}. node-avro-io does not work.

Error I get with node-avro-io:

Avro Invalid Schema Error: Primitive type must be one of: ["null","boolean","int","long","float","double","bytes","string"]; got DependencyNode

Answer 1

In case you're still looking, you can do this with avsc. The code would look something like:

var avro = require('avsc');

// To stream the file's records (they will already be decoded):
avro.createFileDecoder('your/data.avro')
  .on('data', function (record) { /* Do something with the record. */ });

// Or, if you just want the file's header (which includes the schema):
var header = avro.extractFileHeader('your/data.avro');