reading and setting system proxy

go.mod

@@ -7,4 +7,5 @@ require github.com/spf13/cobra v1.8.1
 require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/sys v0.24.0 // indirect
 )

go.sum

@@ -6,5 +6,7 @@ github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
 github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
+golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

proxy/types.go

@@ -0,0 +1,6 @@
+package proxy
+
+type Proxy struct {
+	Enabled bool
+	Server  string
+}

proxy/util.go

@@ -0,0 +1,49 @@
+package proxy
+
+import (
+	"errors"
+
+	"golang.org/x/sys/windows/registry"
+)
+
+func ReadSystemProxy() (*Proxy, error) {
+	key, err := registry.OpenKey(registry.CURRENT_USER, `Software\Microsoft\Windows\CurrentVersion\Internet Settings`, registry.QUERY_VALUE)
+	if err != nil {
+		return nil, err
+	}
+	defer key.Close()
+
+	enabled, _, err := key.GetIntegerValue("proxyEnable")
+	if err != nil {
+		return nil, err
+	}
+
+	server, _, err := key.GetStringValue("proxyServer")
+	if err != nil && !errors.Is(err, registry.ErrNotExist) {
+		return nil, err
+	}
+
+	return &Proxy{Enabled: enabled != 0, Server: server}, nil
+}
+
+func SetSystemProxy(state bool) error {
+	key, err := registry.OpenKey(registry.CURRENT_USER, `Software\Microsoft\Windows\CurrentVersion\Internet Settings`, registry.SET_VALUE)
+	if err != nil {
+		return err
+	}
+	defer key.Close()
+
+	var value uint32
+	if state {
+		value = 1
+	} else {
+		value = 0
+	}
+
+	err = key.SetDWordValue("proxyEnable", value)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}