thrift/lib/nodejs/README.md

Thrift Node.js Library

License

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Compatibility

node version 6 or later is required

Install

npm install thrift 

Thrift Compiler

You can compile IDL sources for Node.js with the following command:

thrift --gen js:node thrift_file

Cassandra Client Example:

Here is a Cassandra example:

var thrift = require('thrift'),
    Cassandra = require('./gen-nodejs/Cassandra')
    ttypes = require('./gen-nodejs/cassandra_types');

var connection = thrift.createConnection("localhost", 9160),
    client = thrift.createClient(Cassandra, connection);

connection.on('error', function(err) {
  console.error(err);
});

client.get_slice("Keyspace", "key", new ttypes.ColumnParent({column_family: "ExampleCF"}), new ttypes.SlicePredicate({slice_range: new ttypes.SliceRange({start: '', finish: ''})}), ttypes.ConsistencyLevel.ONE, function(err, data) {
  if (err) {
    // handle err
  } else {
    // data == [ttypes.ColumnOrSuperColumn, ...]
  }
  connection.end();
});

Int64

Since JavaScript represents all numbers as doubles, int64 values cannot be accurately represented naturally. To solve this, int64 values in responses will be wrapped with Thrift.Int64 objects. The Int64 implementation used is broofa/node-int64.

Client and server examples

Several example clients and servers are included in the thrift/lib/nodejs/examples folder and the cross language tutorial thrift/tutorial/nodejs folder.

Use on browsers

You can use code generated with js:node on browsers with Webpack. Here is an example.

thrift --gen js:node,ts,es6,with_ns

import * as thrift from 'thrift';
import { MyServiceClient } from '../gen-nodejs/MyService';

let host = window.location.hostname;
let port = 443;
let opts = {
  transport: thrift.TBufferedTransport,
  protocol: thrift.TJSONProtocol, 
    headers: {
     'Content-Type': 'application/vnd.apache.thrift.json',
    },
    https: true,
    path: '/url/path',
    useCORS: true,
};

let connection = thrift.createXHRConnection(host, port, opts);
let thriftClient = thrift.createXHRClient(MyServiceClient, connection);

connection.on('error', (err) => {
  console.error(err);
});

thriftClient.myService(param)
  .then((result) => {
    console.log(result);
  })
  .catch((err) => {
    ....
  });

Bundlers, like webpack, will use thrift/browser.js by default because of the "browser": "./lib/nodejs/lib/thrift/browser.js" field in package.json.

Browser example with WebSocket, BufferedTransport and BinaryProtocol

import thrift from 'thrift';
import { MyServiceClient } from '../gen-nodejs/MyService';

const host = window.location.hostname;
const port = 9090;
const opts = {
  transport: thrift.TBufferedTransport,
  protocol: thrift.TBinaryProtocol
}
const connection = thrift.createWSConnection(host, port, opts);
connection.open();
const thriftClient = thrift.createWSClient(MyServiceClient, connection);

connection.on('error', (err) => {
  console.error(err);
});

thriftClient.myService(param)
  .then((result) => {
    console.log(result);
  })
  .catch((err) => {
    ....
  });