I need a good solution, preferably existing one, such as Google Rest API, for data to stream/insert into BigQuery. I don't want to use POST method to send data - for many design reasons. I am expecting 1000s of writes per seconds. The data will be appended in url's query parameters. It's very similar to what Google analytics does, sending analytics data using Get method.
Google cloud functions (GCF) solved the problem. GCF is still in beta but well most google products are in beta anyway. GCF is serverless and one can write http triggers in few line of codes. For further information visit -> https://console.cloud.google.com/functions