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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| extproc "github.com/envoyproxy/go-control-plane/envoy/service/ext_proc/v3" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/reflection" | ||
| "gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer" | ||
| "gopkg.in/DataDog/dd-trace-go.v1/internal/appsec/emitter/httpsec" | ||
| "net" | ||
| "os" | ||
| ) | ||
|
|
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| // AppsecCalloutServiceExtensionService defines the struct that follows the ExternalProcessorServer interface. | ||
| type AppsecCalloutServiceExtensionService struct { | ||
| extproc.ExternalProcessorServer | ||
| } | ||
|
|
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| func main() { | ||
| var customService AppsecCalloutServiceExtensionService | ||
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| os.Setenv("DD_APPSEC_ENABLED", "true") | ||
| tracer.Start(tracer.WithServiceName("appsec-callout-service-extension")) | ||
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| go StartGRPC(&customService) | ||
| println("gRPC server started on port 50051") | ||
|
|
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| select {} | ||
| } | ||
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| // NewAppsecCalloutServiceExtensionService creates a new instance of AppsecCalloutServiceExtensionService. | ||
| func NewAppsecCalloutServiceExtensionService() *AppsecCalloutServiceExtensionService { | ||
| service := &AppsecCalloutServiceExtensionService{} | ||
| return service | ||
| } | ||
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| func (s *AppsecCalloutServiceExtensionService) Process(stream extproc.ExternalProcessor_ProcessServer) error { | ||
| println("Processing request...") | ||
|
|
||
| for { | ||
| req, err := stream.Recv() | ||
| if err != nil { | ||
| println("Error receiving request: ", err) | ||
| return err | ||
| } | ||
|
|
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| // Request section | ||
| var requestHeaders = req.GetRequestHeaders() | ||
| var requestBody = req.GetRequestBody() | ||
| var requestTrailers = req.GetRequestTrailers() | ||
|
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| // Pretty print | ||
| println("Request Headers: ", requestHeaders.GetHeaders().String()) | ||
| println("Request Body: ", requestBody.GetBody()) | ||
| println("Request Trailers: ", requestTrailers.GetTrailers().String()) | ||
|
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| // Build response | ||
| // Empty response because no changes should be made - except on blocking | ||
| var calloutResponse = &extproc.ProcessingResponse{} | ||
|
|
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| // Send response | ||
| if err := stream.Send(calloutResponse); err != nil { | ||
| println("Error sending response: ", err) | ||
| return err | ||
| } | ||
|
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| httpsec.MakeHandlerOperationArgs(nil, "127.0.0.1", nil) | ||
|
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| println("Response sent") | ||
| } | ||
| } | ||
|
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| func StartGRPC(service extproc.ExternalProcessorServer) { | ||
| lis, err := net.Listen("tcp", "0.0.0.0:50051") | ||
| if err != nil { | ||
| println("Failed to listen on insecure port: %v", err) | ||
| } | ||
| grpcServer := grpc.NewServer() | ||
| extproc.RegisterExternalProcessorServer(grpcServer, service) | ||
| reflection.Register(grpcServer) | ||
| if err := grpcServer.Serve(lis); err != nil { | ||
| println("Failed to serve gRPC on insecure port: %v", err) | ||
| } | ||
| } |
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