TykTechnologies · JRWu · Oct 23, 2024
diff --git a/README.md b/README.md
@@ -25,16 +25,17 @@ Golang | Analytics          | Manipulate Tyk analytics records
 
 ### gRPC Plugin Languages
 
-Language | Phase | Description                                                                                              | Link 
--------- | ----- |----------------------------------------------------------------------------------------------------------| --- 
-gRPC (GoLang)	|	Pre	| 	Header Injection & Auth example	                                                                        |	[Link](plugins/grpc_go-auth-pre_headerinject_authhook) 
-gRPC (GoLang)	|	Pre	| 	Invokes an AWS Lambda	                                                                                  |	[Link](plugins/grpc_go-pre-aws_lambda) 
-gRPC (Node)	|	Pre / Autg	| 	Simple NODE example with access to config data Lambda	                                                                                  |	[Link](plugins/grpc_node-auth-simple) 
-gRPC (Java)	|	Auth	| 	Decodes JWT, inserts a claim and resigns it	                                                            |	[Link](plugins/grpc_java-auth-jwt_decoder_repackager) 
-gRPC (Java)	|	Post	| 	Inserts Metadata from the portal requested key as an HTTP header	                                       |	[Link](plugins/grpc_java-post-insert_metadata_as_header) 
-gRPC (.NET)	|	Auth	| 	Performs auth check against a SQL server	                                                               |	[Link](plugins/grpc_dotnet-auth_sql_basicauth ) 
-gRPC (Ruby)	|	Pre  | 	Modifies HTTP header	                                                                                   |	[Link](plugins/grpc_ruby-pre-header_modify) 
-gRPC (Python)	|	Pre  | 	Inserts a HTTP header	                                                                                  |	[Link](plugins/grpc_python-pre-insert_header) 
+Language | Phase | Description                                                        | Link 
+-------- | ----- |--------------------------------------------------------------------| --- 
+gRPC (GoLang)	|	Pre	| 	Header Injection Example (standalone gRPC Server) 	               |	[Link](plugins/grpc-go-pre-headerinject)
+gRPC (GoLang)	|	Pre	| 	Header Injection & Auth example (bundle)	                         |	[Link](plugins/grpc_go-auth-pre_headerinject_authhook) 
+gRPC (GoLang)	|	Pre	| 	Invokes an AWS Lambda	                                            |	[Link](plugins/grpc_go-pre-aws_lambda) 
+gRPC (Node)	|	Pre / Autg	| 	Simple NODE example with access to config data Lambda	            |	[Link](plugins/grpc_node-auth-simple) 
+gRPC (Java)	|	Auth	| 	Decodes JWT, inserts a claim and resigns it	                      |	[Link](plugins/grpc_java-auth-jwt_decoder_repackager) 
+gRPC (Java)	|	Post	| 	Inserts Metadata from the portal requested key as an HTTP header	 |	[Link](plugins/grpc_java-post-insert_metadata_as_header) 
+gRPC (.NET)	|	Auth	| 	Performs auth check against a SQL server	                         |	[Link](plugins/grpc_dotnet-auth_sql_basicauth ) 
+gRPC (Ruby)	|	Pre  | 	Modifies HTTP header	                                             |	[Link](plugins/grpc_ruby-pre-header_modify) 
+gRPC (Python)	|	Pre  | 	Inserts a HTTP header	                                            |	[Link](plugins/grpc_python-pre-insert_header) 
 
 ### Javascript Plugin Languages
 

diff --git a/plugins/grpc-go-pre-headerinject/go.mod b/plugins/grpc-go-pre-headerinject/go.mod
@@ -0,0 +1,113 @@
+module github.com/TykTechnologies/tyk-grpc-go-basicauth-jwt
+
+go 1.22
+
+replace github.com/jeffail/tunny v0.1.4 => github.com/Jeffail/tunny v0.1.4
+
+replace github.com/hashicorp/terraform v1.0.1 => github.com/hashicorp/terraform v0.14.11
+
+require (
+	github.com/TykTechnologies/again v0.0.0-20190805133618-6ad301e7eaed // indirect
+	github.com/TykTechnologies/circuitbreaker v2.2.2+incompatible // indirect
+	github.com/TykTechnologies/drl v0.0.0-20231218155806-88e4363884a2 // indirect
+	github.com/TykTechnologies/goautosocket v0.0.0-20190430121222-97bfa5e7e481 // indirect
+	github.com/TykTechnologies/gojsonschema v0.0.0-20170222154038-dcb3e4bb7990 // indirect
+	github.com/TykTechnologies/gorpc v0.0.0-20241016124253-606484472fbb // indirect
+	github.com/TykTechnologies/goverify v0.0.0-20220808203004-1486f89e7708 // indirect
+	github.com/TykTechnologies/leakybucket v0.0.0-20170301023702-71692c943e3c // indirect
+	github.com/TykTechnologies/murmur3 v0.0.0-20230310161213-aad17efd5632 // indirect
+	github.com/TykTechnologies/openid2go v0.1.2 // indirect
+	github.com/bshuster-repo/logrus-logstash-hook v1.1.0 // indirect
+	github.com/buger/jsonparser v1.1.1 // indirect
+	github.com/cenk/backoff v2.2.1+incompatible // indirect
+	github.com/clbanning/mxj v1.8.4 // indirect
+	github.com/evalphobia/logrus_sentry v0.8.2 // indirect
+	github.com/gemnasium/logrus-graylog-hook v2.0.7+incompatible // indirect
+	github.com/go-jose/go-jose/v3 v3.0.3 // indirect
+	github.com/gocraft/health v0.0.0-20170925182251-8675af27fef0 // indirect
+	github.com/golang-jwt/jwt/v4 v4.5.0 // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/gorilla/mux v1.8.1 // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/justinas/alice v1.2.0 // indirect
+	github.com/kelseyhightower/envconfig v1.4.0 // indirect
+	github.com/lonelycode/osin v0.0.0-20160423095202-da239c9dacb6 // indirect
+	github.com/mavricknz/ldap v0.0.0-20160227184754-f5a958005e43 // indirect
+	github.com/miekg/dns v1.1.62 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/opentracing/opentracing-go v1.2.0 // indirect
+	github.com/openzipkin/zipkin-go v0.4.3 // indirect
+	github.com/oschwald/maxminddb-golang v1.13.1 // indirect
+	github.com/paulbellamy/ratecounter v0.2.0 // indirect
+	github.com/pires/go-proxyproto v0.7.0 // indirect
+	github.com/pmylund/go-cache v2.1.0+incompatible // indirect
+	github.com/robertkrimen/otto v0.4.0 // indirect
+	github.com/rs/cors v1.11.1 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect; test
+	github.com/uber/jaeger-client-go v2.30.1-0.20220110192849-8d8e8fcfd04d+incompatible // indirect
+	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
+	golang.org/x/crypto v0.27.0 // indirect
+	golang.org/x/net v0.29.0
+	google.golang.org/grpc v1.66.2
+	google.golang.org/protobuf v1.34.2 // indirect
+	gopkg.in/vmihailenco/msgpack.v2 v2.9.2 // indirect
+	gopkg.in/xmlpath.v2 v2.0.0-20150820204837-860cbeca3ebc // indirect
+)
+
+require github.com/TykTechnologies/tyk v2.9.5+incompatible
+
+require (
+	github.com/Jeffail/gabs v1.4.0 // indirect
+	github.com/Masterminds/goutils v1.1.1 // indirect
+	github.com/Masterminds/semver v1.5.0 // indirect
+	github.com/agext/levenshtein v1.2.2 // indirect
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
+	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
+	github.com/apparentlymart/go-textseg/v13 v13.0.0 // indirect
+	github.com/certifi/gocertifi v0.0.0-20210507211836-431795d63e8d // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/facebookgo/clock v0.0.0-20150410010913-600d898af40a // indirect
+	github.com/franela/goblin v0.0.0-20211003143422-0a4f594942bf // indirect
+	github.com/franela/goreq v0.0.0-20171204163338-bcd34c9993f8 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/getsentry/raven-go v0.2.0 // indirect
+	github.com/go-redis/redis v6.15.9+incompatible // indirect
+	github.com/go-test/deep v1.0.8 // indirect
+	github.com/hashicorp/errwrap v1.1.0 // indirect
+	github.com/hashicorp/hcl/v2 v2.9.1 // indirect
+	github.com/hashicorp/terraform v1.0.1 // indirect
+	github.com/huandu/xstrings v1.5.0 // indirect
+	github.com/imdario/mergo v0.3.13 // indirect
+	github.com/jeffail/tunny v0.1.4 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/lonelycode/go-uuid v0.0.0-20141202165402-ed3ca8a15a93 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mavricknz/asn1-ber v0.0.0-20151103223136-b9df1c2f4213 // indirect
+	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
+	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
+	github.com/newrelic/go-agent v2.13.0+incompatible // indirect
+	github.com/onsi/ginkgo v1.16.5 // indirect
+	github.com/onsi/gomega v1.33.1 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/rogpeppe/go-internal v1.11.1-0.20231026093722-fa6a31e0812c // indirect
+	github.com/uber/jaeger-lib v2.4.2-0.20210604143007-135cf5605a6d+incompatible // indirect
+	github.com/x-cray/logrus-prefixed-formatter v0.5.2 // indirect
+	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
+	github.com/zclconf/go-cty v1.8.0 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+	golang.org/x/term v0.24.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
+	google.golang.org/appengine v1.6.8 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240604185151-ef581f913117 // indirect
+	gopkg.in/Masterminds/sprig.v2 v2.22.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	rsc.io/letsencrypt v0.0.3 // indirect
+)
diff --git a/plugins/grpc-go-pre-headerinject/main.go b/plugins/grpc-go-pre-headerinject/main.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+	"github.com/TykTechnologies/tyk/coprocess"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"log"
+	"net"
+)
+
+// Dispatcher implementation
+type Dispatcher struct{}
+
+// Dispatch will be called on every request:
+func (d *Dispatcher) Dispatch(ctx context.Context, object *coprocess.Object) (*coprocess.Object, error) {
+	log.Println("Receiving object:", object)
+
+	// We dispatch the object based on the hook name (as specified in the manifest file), these functions are in hooks.go:
+	switch object.HookName {
+	case "MyPreHook":
+		log.Println("MyPreHook is called!")
+		return MyPreHook(object)
+	}
+
+	log.Println("Unknown hook: ", object.HookName)
+
+	return object, nil
+}
+
+// DispatchEvent will be called when a Tyk event is triggered:
+func (d *Dispatcher) DispatchEvent(ctx context.Context, event *coprocess.Event) (*coprocess.EventReply, error) {
+	return &coprocess.EventReply{}, nil
+}
+
+const (
+	ListenAddress = ":5555"
+)
+
+// MyPreHook performs a header injection:
+func MyPreHook(object *coprocess.Object) (*coprocess.Object, error) {
+	object.Request.SetHeaders = map[string]string{
+		"Myheader": "Myvalue",
+	}
+
+	return object, nil
+}
+
+func main() {
+	lis, err := net.Listen("tcp", ListenAddress)
+	if err != nil {
+		log.Fatalf("Failed to listen: %v", err)
+	}
+
+	log.Printf("starting grpc server on %v", ListenAddress)
+	s := grpc.NewServer()
+	coprocess.RegisterDispatcherServer(s, &Dispatcher{})
+	s.Serve(lis)
+}
diff --git a/plugins/grpc-go-pre-headerinject/readme.md b/plugins/grpc-go-pre-headerinject/readme.md
@@ -0,0 +1,23 @@
+# grpc-go-pre-headerinject
+
+Allows a user to spin up a gRPC server in Go to service requests from Tyk.
+Leverages the updated Protobuf definitions from Tyk. The included file `tykapidef_classic_grpc_go_header_injection.json` can be imported into Tyk and leverages the plugin.
+
+## Quickstart
+```zsh
+# Navigate into the repo
+cd grpc-go-pre-headerinject
+
+go mod tidy
+
+go run main.go
+```
+
+The gRPC server will now be running on localhost:5555. Import the file `tykapidef_classic_grpc_go_header_injection.json` into your Tyk installation and then invoke the resultant API to see the header injected.
+
+## Note
+The go.mod is sourced from [here](https://github.com/TykTechnologies/tyk/blob/master/go.mod).
+
+The flatmap error can be overcome with the following replace statement in the go.mod file:
+
+`replace github.com/hashicorp/terraform v1.0.1 => github.com/hashicorp/terraform v0.14.11`