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-# go-fasthttp-keycloak-middleware
+# Purpose
+Specific JWT Validation Middleware for Keycloak Authorization Permission Scope.
+
+# Support
+* Go Application with Fast HTTP Web Framework.
+* JWT Validation with Json Web Key(JWK).
+
+# Dependency
+* [Fast HTTP Framework](https://github.com/valyala/fasthttp)
+* [JWT by cristalhq](https://github.com/cristalhq/jwt)
+* [GoDotEnv by joho](https://github.com/joho/godotenv)
+
+# Install
+Go Version 1.22+
+```
+go get github.com/erajayatech/go-fasthttp-keycloak-middleware
+```
+
+# Setup Environment
+* KEYCLOAK_JWT_ENABLED
+```.env
+example in .env file: 
+KEYCLOAK_JWT_ENABLED=1
+```
+* KEYCLOAK_JWT_ISS
+```.env
+example in .env file: 
+KEYCLOAK_JWT_ISS=http://localhost:9999/auth/realms/dashboard
+```
+* KEYCLOAK_JWT_JWK_ENDPOINT
+```.env
+example in .env file: 
+KEYCLOAK_JWT_JWK_ENDPOINT=http://localhost:9999/auth/realms/dashboard/protocol/openid-connect/certs
+```
+
+# Example: Keycloak Token
+```
+eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJtU0czMFVkV3FfZU5XLU1PdEdSWWxrVkx1Z3RjbjA5NTJfU3BJc04xX0RVIn0.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.FTN91cHm4JoarE4co6MrMDhdbsdUuELfbcU0rAGYydf-LrImUHsFnbJ6n0efDtar3Wy4VoxAnCFyTl38uhbg5Q7wKpyAs4hZQyyz9owvKKeR7rzGMGB1tAWhB2hObd3qN_YQvmxJqkwZbeanmeqUAmU5qPxAmyk9r2ZUaUou0um0IO5HfLDsPzu0TJlD35CBTO699lH8ggC7GVcutEBVfHnOJMuTmFM5-2ZlXpU_Q5CGs7MFzRVNKpJiCxSJO4vDjh3l5xUoafU4j1FehU0lxXNPg1Oif0IOZZRR-eHZ-oaDnMJ_8aWFMSf6nMX5QrUihl0dHr3cMNQhFVOe8qd1hw
+```
+Payload:
+```json
+{
+     "exp": 1640839414,
+     "iat": 1640839114,
+     "jti": "c1c27012-325f-4f5a-83ed-5290e5211d0b",
+     "iss": "http://localhost:9999/auth/realms/dashboard",
+     "aud": "dashboard-api",
+     "sub": "1dfdb9c2-12e6-4e5f-adf8-69a4ce1f24db",
+     "typ": "Bearer",
+     "azp": "dashboard-api",
+     "session_state": "2dd10105-3a77-4525-b2c1-5f6cfb071565",
+     "acr": "1",
+     "realm_access": {
+       "roles": [
+         "order_viewer"
+       ]
+     },
+     "authorization": {
+       "permissions": [
+         {
+           "scopes": [
+             "order:list",
+             "order:detail"
+           ],
+           "rsid": "7396778e-e61b-4fe7-af9f-36918494d677",
+           "rsname": "order"
+         }
+       ]
+     },
+     "scope": "profile email",
+     "sid": "2dd10105-3a77-4525-b2c1-5f6cfb071565",
+     "email_verified": true,
+     "name": "Cak Obob",
+     "preferred_username": "cakobob",
+     "given_name": "Cak",
+     "family_name": "Obob",
+     "email": "bobby.brillian@gmail.com"
+   }
+```
+
+Please read for key `authorization` in `permission scope`, this package is intended to validate that section.
+This package also attach `name` as `keycloak_name`, `preferred_username` as `keycloak_username`, and `email` as `keycloak_email` in gin context.
+
+# Example: Setup in Route
+* Import package in route setting file.
+```go
+import keycloakmiddleware "github.com/erajayatech/go-fasthttp-keycloak-middleware"
+```
+* Setup in route
+  for example we have scope `order:view`, `order:list`, and `order:update`.
+```go
+router := router.New()
+scopeMiddleware := keycloakmiddleware.Construct(0) // 0: default wrapper, 1: standard wrapper, 2: traceable wrapper
+router.POST("/order", scopeMiddleware.Validate([]string{"order:view", "order:list"}, orderListHandler))
+router.PUT("/order/{id}", scopeMiddleware.Validate([]string{"order:update"}, orderUpdateHandler))
+```
+
+# Example: Retrieve Additional Data in Context
+This package attach jwt payload `name` as `keycloak_name`, `preferred_username` as `keycloak_username`, and `email` as `keycloak_email` in gin context.
+When you want to get that data from context in your handler, then just do something like this:
+```go
+username := context.GetString("keycloak_username")
+name := context.GetString("keycloak_name")
+email := context.GetString("keycloak_email")
+```
+
+# License
+[MIT License](LICENSE).
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