Go Pub/Sub UI

This tool eases debugging Google Clouds Pub/Sub with a simple UI.

Features include:

• Subscription to given topics
• Automatic creation of non-existent topics or subscriptions
• Publishing messages from UI to configured topics
• Configurable pre-defined payloads per topic
• Live update of received messages
• Multi-projects

Configuration

Following environment variables may be set:

Variable	Usage	Default value
GOPUBSUB_CONFIG	Config file path	config.yaml (within /go/src/app/ in Docker image)
GOPUBSUB_PORT	Listening HTTP port	8080
GOPUBSUB_MAX_MESSAGES	Only keep last n messages per topic	10
GOOGLE_APPLICATION_CREDENTIALS	Path to JSON credentials file	none
PUBSUB_EMULATOR_HOST	Host of emulator (see below)	none
GOOGLE_CLOUD_PROJECT	Default project name	default-project

The config.yaml file

To get GoPubSub working, you'll need to create config.yaml file with your topics and subscriptions info:

topics:
  -
    name: my-topic
    project: my-gcp-project
    subscription: my-subscription
  -
    name: my-other-topic
    project: other-gcp-project
    subscription: my-other-subscription
    payloads:
      -
        name: hello
        payload: |
          {"hello": "world"}
      -
        name: hello-again
        payload: |
          {"hello": "world again"}
  -
    name: my-last-topic

Note that all non-existant topic or subscription will be created. If no subscription is given for a topic, it will be created as sub-<topic-name>.

Usage

Using binary

Download latest release for your OS from the releases page, or run:

go get -u github.com/clickandmortar/gopubsub

Then:

export GOPUBSUB_CONFIG="/path/to/config.yaml"

# To use local emulator
export PUBSUB_EMULATOR_HOST=localhost:8085

# To use actual Pub/Sub service
export GOOGLE_APPLICATION_CREDENTIALS="/path/to/application_default_credentials.json"

gopubsub

And open http://localhost:8080.

Using Docker image

docker pull clickandmortar/gopubsub
docker run -d \
 -v $(pwd)/config.yaml:/go/src/app/config.yaml \
 -p 8080:8080 \
 --name="gopubsub" \
 -e PUBSUB_EMULATOR_HOST=pubsub:8085 \
 clickandmortar/gopubsub

With docker-compose

docker-compose up -d

From source

go run main.go

Build

Binaries

make

Linux and macOS (Darwin) binaries will be available under the bin/ directory.

Docker image

make docker

Improvements

• Remove initial AJAX call
• Output message attributes
• Use Vue.js for form
• Fetch available topics list
• Multi-project compatibility
• Live update (using SSE)
• JSON pretty-printing
• Working message publication
• Samples for message publication

Credits

This app is heavily inspired by Google's sample.