HTTP Proxy Logger

HTTP Proxy Logger is a small reverse proxy that prints incoming HTTP requests and outgoing responses to stdout. Bodies compressed with gzip, deflate, or br are automatically decompressed in the logs so that you can easily inspect them. The output uses ANSI colors similar to HTTPie: request and response lines, header names, and JSON or XML bodies are highlighted for readability.

Example output

Installation

Homebrew (macOS)

brew install stn1slv/tap/http-proxy-logger

Download binary (Linux / Windows / macOS)

Pre-built binaries for all platforms are available on the Releases page.

Download the binary for your OS/architecture, make it executable, and move it to a directory in your PATH:

# Example for Linux amd64
curl -fsSL https://github.com/stn1slv/http-proxy-logger/releases/latest/download/http-proxy-logger-linux-amd64 -o http-proxy-logger
chmod +x http-proxy-logger
sudo mv http-proxy-logger /usr/local/bin/

Docker

docker pull stn1slv/http-proxy-logger

From source

Requires Go 1.26+.

go build -o http-proxy-logger

Running

Set the TARGET environment variable to the upstream server and optionally PORT for the listen address. These values can also be provided with the -target and -port flags which override the environment.

Use the -requests and -responses flags to control which messages are printed. Both default to true.

Use the -no-color flag to disable colored output and remove ANSI color codes from the logs, useful for redirecting output to files or when colors are not desired.

The tool automatically highlights JSON and XML bodies with syntax coloring and proper formatting while preserving important structural information like XML namespaces and namespace prefixes (e.g., soapenv:Envelope).

Local execution

./http-proxy-logger -target http://example.com -port 8888 -responses=false

To disable colored output:

./http-proxy-logger -target http://example.com -port 8888 -no-color=true

Docker

docker run --rm -it -p 8888:8888 \
  stn1slv/http-proxy-logger \
  -target http://demo7704619.mockable.io \
  -port 8888

Add -responses=false to log only requests or -requests=false to log only responses. Add -no-color=true to disable colored output. Flags -target and -port may be used instead of the corresponding environment variables.

The proxy will forward traffic to the target and log each request/response pair using the format shown above.

License

This project is licensed under the MIT License.