https://github.com/winebarrel/gap

Simple HTTP proxy with Google Oauth2 access token verification.
https://github.com/winebarrel/gap

golang google oauth2 proxy

Last synced: 5 months ago
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Simple HTTP proxy with Google Oauth2 access token verification.

• Host: GitHub
• URL: https://github.com/winebarrel/gap
• Owner: winebarrel
• License: mit
• Created: 2025-08-31T07:57:19.000Z (10 months ago)
• Default Branch: main
• Last Pushed: 2025-11-14T05:47:23.000Z (7 months ago)
• Last Synced: 2025-11-14T07:23:37.669Z (7 months ago)
• Topics: golang, google, oauth2, proxy
• Language: Go
• Homepage:
• Size: 58.6 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# gap

[![CI](https://github.com/winebarrel/gap/actions/workflows/ci.yml/badge.svg)](https://github.com/winebarrel/gap/actions/workflows/ci.yml)

Simple HTTP proxy with Google Oauth2 access token verification.

## Usage

```

Usage: gap --backend=BACKEND --port=UINT --header-name=STRING --allow-list=ALLOW-LIST,... [flags]

Flags:

  -h, --help                  Show help.

  -b, --backend=BACKEND       Backend URL ($GAP_BACKEND).

  -p, --port=UINT             Listening port ($GAP_PORT).

  -n, --header-name=STRING    Header name to pass the access token

                              ($GAP_HEADER).

  -e, --allow-list=ALLOW-LIST,...

                              Allowed email list that may contain wildcards

                              ($GAP_ALLOW_LIST).

      --version

```

```sh

$ go run ./cmd/gap -b https://example.com -e '*@example.com' -p 8080 -n x-my-gap-token

# When using Docker:

# docker run --rm -p 8080:8080 ghcr.io/winebarrel/gap -b https://example.com -e '*@example.com' -p 8080 -n x-my-gap-token

```

```sh

# Get Oauth2 token from Apps Script and set it in an environment variable.

# e.g. https://developers.google.com/apps-script/reference/script/script-app#getOAuthToken()

$ export TOKEN='xxx'

$ curl  -H "x-my-gap-token: ${NOT_CORRECT_TOKEN}" localhost:8080

forbidden

~% curl -H "x-my-gap-token: ${TOKEN}" localhost:8080

    Example Domain

...

```