Speaking with a Webpage - Streaming Speech Transcripts
This lab is split into multiple sections, each section introduces a component of the final web application.
The webapp you'll create will take audio from the client's microphone and stream it to a Java servlet. The Java servlet passes the data to the Cloud Speech API, which will stream transcriptions of any speech it detects back to the servlet. The servlet then passes the transcription results to the client, which then displays it on the page.
To accomplish this, you'll need to create several components:
- A servlet Websocket handler to stream the sound bytes it receives from the client to the Cloud Speech API, and streams the transcription results from the Cloud Speech API back to the client.
What you'll do
- Create a virtual machine (VM)
- Start an HTTP Java servlet
- Capture audio on a webpage
- Transcribe voice to text
This lab assumes familiarity with:
- The Java programming language.
- Java servlets (specifically, the Jetty servlet container). While other servlet containers can be used, the sample solution uses Jetty, making solutions using other containers harder to verify against.
- The Linux command line. Much of the lab will take place at a Linux command prompt, and familiarity with some common tools and a text editor for that environment will make things easier.
- The Maven project management tool. While in principle, any Java project management tool can be used, the sample solution uses Maven, making solutions using other tools harder to verify against.
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Create a virtual machine (zone: us-central1-f)
Install necessary software on VM instance
Create a firewall rule to allow TCP traffic on 8443 port in the default network
Run the sample solution (hello-https)
Run the sample solution to capture audio on webpage