feat: add environment variables

Author: openscript

.devcontainer/devcontainer.env

@@ -0,0 +1,4 @@
+PORT=3000
+REDIRECT_PATH=https://example.com
+REDIRECT_SESSION_PARAM_KEY=ory_kratos_session
+SESSION_COOKIE_KEY=ory_kratos_session

.devcontainer/devcontainer.json

@@ -27,5 +27,8 @@
 	// "postCreateCommand": "go version",
 
 	// Set `remoteUser` to `root` to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
-	"remoteUser": "vscode"
+	"remoteUser": "vscode",
+
+	// Load environment variables: https://code.visualstudio.com/remote/advancedcontainers/environment-variables#_option-2-use-an-env-file
+	"runArgs": ["--env-file",".devcontainer/devcontainer.env"]
 }

Dockerfile

@@ -9,6 +9,9 @@ RUN go mod verify
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /go/bin/ory-kratos-session-catcher
 
 FROM scratch
+ENV PORT=3000
+ENV REDIRECT_SESSION_PARAM_KEY=ory_kratos_session
+ENV SESSION_COOKIE_KEY=ory_kratos_session
 COPY --from=builder /go/bin/ory-kratos-session-catcher /go/bin/ory-kratos-session-catcher
-EXPOSE 3000
+EXPOSE $PORT
 ENTRYPOINT ["/go/bin/ory-kratos-session-catcher"]

README.md

@@ -1,6 +1,6 @@
 # Ory Kratos Session Catcher
 
-Unfortunately with [Ory Kratos](https://www.ory.sh/kratos/) it is currently impossible to offer authentication via one of the social login providers (Google, Apple, ..) for non-browser API apps like mobile apps. The browser API cannot be used, because the session is sent as a HttpOnly cookie to the client. It is hard or impossible to extract the session from a mobile webview.
+Unfortunately with [Ory Kratos](https://www.ory.sh/kratos/) alone it is currently impossible to offer authentication via one of the social login providers (Google, Apple, ..) for non-browser API apps like mobile apps. The browser API cannot be used, because the session is sent as a HttpOnly cookie to the client. It is hard or impossible to extract the session from a mobile webview.
 
 This service can be called after a session is returned from Kratos to a browser endpoint. It will read the cookie and redirects the user back to a non-browser app via deep linking.
 

ory_kratos_session_catcher.go

@@ -1,12 +1,36 @@
 package main
 
 import (
+	"fmt"
 	"log"
+	"os"
 
 	"github.com/gofiber/fiber/v2"
 )
 
+type configuration struct {
+	port                    string
+	redirectPath            string
+	redirectSessionParamKey string
+	sessionCookieKey        string
+}
+
+func (c *configuration) load() {
+	c.port = os.Getenv("PORT")
+	c.redirectPath = os.Getenv("REDIRECT_PATH")
+	c.redirectSessionParamKey = os.Getenv("REDIRECT_SESSION_PARAM_KEY")
+	c.sessionCookieKey = os.Getenv("SESSION_COOKIE_KEY")
+}
+
+func (c *configuration) display() {
+	fmt.Println("Configuration:\n##############", "\nPORT: ", c.port, "\nREDIRECT_PATH: ", c.redirectPath, "\nREDIRECT_SESSION_PARAM_KEY: ", c.redirectSessionParamKey, "\nSESSION_COOKIE_KEY: ", c.sessionCookieKey)
+}
+
 func main() {
+	c := &configuration{}
+	c.load()
+	c.display()
+
 	app := fiber.New(fiber.Config{
 		AppName: "Ory Kratos Session Catcher",
 	})
@@ -15,5 +39,5 @@ func main() {
 		return c.SendString("Hello, World!")
 	})
 
-	log.Fatal(app.Listen(":3000"))
+	log.Fatal(app.Listen(fmt.Sprintf(":%s", c.port)))
 }