Repository: ollama/ollama
Pull request: pass flags to `serve` to allow setting allowed-origins + host and port

resolves: https://github.com/jmorganca/ollama/issues/300 and https://github.com/jmorganca/ollama/issues/282

example usage:
```
ollama serve --port 9999 --allowed-origins "http://foo.example.com,http://192.0.0.1"
```

Changed files:
filename: cmd/cmd.go
patch: @@ -513,23 +513,44 @@ func generateBatch(cmd *cobra.Command, model string) error {
 	return nil
 }
 
-func RunServer(_ *cobra.Command, _ []string) error {
-	host := os.Getenv("OLLAMA_HOST")
-	if host == "" {
-		host = "127.0.0.1"
+// getRunServerParams takes a command and the environment variables and returns the correct params
+// given the order of precedence: command line args (highest), environment variables, defaults (lowest)
+func getRunServerParams(cmd *cobra.Command) (host, port string, extraOrigins []string, err error) {
+	host = os.Getenv("OLLAMA_HOST")
+	hostFlag := cmd.Flags().Lookup("host")
+	if hostFlag == nil {
+		return "", "", nil, errors.New("host unset")
+	}
+	if hostFlag.Changed || host == "" {
+		host = hostFlag.Value.String()
+	}
+	port = os.Getenv("OLLAMA_PORT")
+	portFlag := cmd.Flags().Lookup("port")
+	if portFlag == nil {
+		return "", "", nil, errors.New("port unset")
+	}
+	if portFlag.Changed || port == "" {
+		port = portFlag.Value.String()
+	}
+	extraOrigins, err = cmd.Flags().GetStringSlice("allowed-origins")
+	if err != nil {
+		return "", "", nil, err
 	}
+	return host, port, extraOrigins, nil
+}
 
-	port := os.Getenv("OLLAMA_PORT")
-	if port == "" {
-		port = "11434"
+func RunServer(cmd *cobra.Command, _ []string) error {
+	host, port, extraOrigins, err := getRunServerParams(cmd)
+	if err != nil {
+		return err
 	}
 
 	ln, err := net.Listen("tcp", fmt.Sprintf("%s:%s", host, port))
 	if err != nil {
 		return err
 	}
 
-	return server.Serve(ln)
+	return server.Serve(ln, extraOrigins)
 }
 
 func startMacApp(client *api.Client) error {
@@ -621,6 +642,10 @@ func NewCLI() *cobra.Command {
 		RunE:    RunServer,
 	}
 
+	serveCmd.Flags().String("port", "11434", "Port to listen on, may also use OLLAMA_PORT environment variable")
+	serveCmd.Flags().String("host", "127.0.0.1", "Host listen address, may also use OLLAMA_HOST environment variable")
+	serveCmd.Flags().StringSlice("allowed-origins", []string{}, "Additional allowed CORS origins (outside of localhost), specify as comma-separated list")
+
 	pullCmd := &cobra.Command{
 		Use:     "pull MODEL",
 		Short:   "Pull a model from a registry",

filename: cmd/cmd_test.go
patch: @@ -0,0 +1,103 @@
+package cmd
+
+import (
+	"os"
+	"testing"
+)
+
+func TestGetRunServerParams(t *testing.T) {
+	t.Run("default values", func(t *testing.T) {
+		cmd := NewCLI()
+		serveCmd, _, err := cmd.Find([]string{"serve"})
+		if err != nil {
+			t.Errorf("expected serve command, got %s", err)
+		}
+		host, port, extraOrigins, err := getRunServerParams(serveCmd)
+		// assertions
+		if err != nil {
+			t.Errorf("unexpected error, got %s", err)
+		}
+		if host != "127.0.0.1" {
+			t.Errorf("unexpected host, got %s", host)
+		}
+		if port != "11434" {
+			t.Errorf("unexpected port, got %s", port)
+		}
+		if len(extraOrigins) != 0 {
+			t.Errorf("unexpected origins, got %s", extraOrigins)
+		}
+	})
+	t.Run("environment variables take precedence over default", func(t *testing.T) {
+		cmd := NewCLI()
+		serveCmd, _, err := cmd.Find([]string{"serve"})
+		if err != nil {
+			t.Errorf("expected serve command, got %s", err)
+		}
+		// setup environment variables
+		err = os.Setenv("OLLAMA_HOST", "0.0.0.0")
+		if err != nil {
+			t.Errorf("could not set env var")
+		}
+		err = os.Setenv("OLLAMA_PORT", "9999")
+		if err != nil {
+			t.Errorf("could not set env var")
+		}
+		defer func() {
+			os.Unsetenv("OLLAMA_HOST")
+			os.Unsetenv("OLLAMA_PORT")
+		}()
+
+		host, port, extraOrigins, err := getRunServerParams(serveCmd)
+		// assertions
+		if err != nil {
+			t.Errorf("unexpected error, got %s", err)
+		}
+		if host != "0.0.0.0" {
+			t.Errorf("unexpected host, got %s", host)
+		}
+		if port != "9999" {
+			t.Errorf("unexpected port, got %s", port)
+		}
+		if len(extraOrigins) != 0 {
+			t.Errorf("unexpected origins, got %s", extraOrigins)
+		}
+	})
+	t.Run("command line args take precedence over env vars", func(t *testing.T) {
+		cmd := NewCLI()
+		serveCmd, _, err := cmd.Find([]string{"serve"})
+		if err != nil {
+			t.Errorf("expected serve command, got %s", err)
+		}
+		// setup environment variables
+		err = os.Setenv("OLLAMA_HOST", "0.0.0.0")
+		if err != nil {
+			t.Errorf("could not set env var")
+		}
+		err = os.Setenv("OLLAMA_PORT", "9999")
+		if err != nil {
+			t.Errorf("could not set env var")
+		}
+		defer func() {
+			os.Unsetenv("OLLAMA_HOST")
+			os.Unsetenv("OLLAMA_PORT")
+		}()
+		// now set command flags
+		serveCmd.Flags().Set("host", "localhost")
+		serveCmd.Flags().Set("port", "8888")
+		serveCmd.Flags().Set("allowed-origins", "http://foo.example.com,http://192.168.1.1")
+
+		host, port, extraOrigins, err := getRunServerParams(serveCmd)
+		if err != nil {
+			t.Errorf("unexpected error, got %s", err)
+		}
+		if host != "localhost" {
+			t.Errorf("unexpected host, got %s", host)
+		}
+		if port != "8888" {
+			t.Errorf("unexpected port, got %s", port)
+		}
+		if len(extraOrigins) != 2 {
+			t.Errorf("expected two origins, got length %d", len(extraOrigins))
+		}
+	})
+}

filename: server/routes.go
patch: @@ -301,11 +301,11 @@ func CopyModelHandler(c *gin.Context) {
 	}
 }
 
-func Serve(ln net.Listener) error {
+func Serve(ln net.Listener, extraOrigins []string) error {
 	config := cors.DefaultConfig()
 	config.AllowWildcard = true
 	// only allow http/https from localhost
-	config.AllowOrigins = []string{
+	allowedOrigins := []string{
 		"http://localhost",
 		"http://localhost:*",
 		"https://localhost",
@@ -315,6 +315,8 @@ func Serve(ln net.Listener) error {
 		"https://127.0.0.1",
 		"https://127.0.0.1:*",
 	}
+	allowedOrigins = append(allowedOrigins, extraOrigins...)
+	config.AllowOrigins = allowedOrigins
 
 	r := gin.Default()
 	r.Use(cors.New(config))