Remove the word middleware (#1067)

* Rename middleware to plugin

first pass; mostly used 'sed', few spots where I manually changed
text.

This still builds a coredns binary.

* fmt error

* Rename AddMiddleware to AddPlugin

* Readd AddMiddleware to remain backwards compat

1 files changed, 324 insertions, 0 deletions

diff --git a/plugin/proxy/upstream_test.go b/plugin/proxy/upstream_test.go
new file mode 100644
index 000000000..42d50cac3
--- /dev/null
+++ b/plugin/proxy/upstream_test.go
@@ -0,0 +1,324 @@
+package proxy
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/coredns/coredns/plugin/test"
+
+	"github.com/mholt/caddy"
+)
+
+func TestAllowedDomain(t *testing.T) {
+	upstream := &staticUpstream{
+		from:              "miek.nl.",
+		IgnoredSubDomains: []string{"download.miek.nl.", "static.miek.nl."}, // closing dot mandatory
+	}
+	tests := []struct {
+		name     string
+		expected bool
+	}{
+		{"miek.nl.", true},
+		{"download.miek.nl.", false},
+		{"static.miek.nl.", false},
+		{"blaat.miek.nl.", true},
+	}
+
+	for i, test := range tests {
+		isAllowed := upstream.IsAllowedDomain(test.name)
+		if test.expected != isAllowed {
+			t.Errorf("Test %d: expected %v found %v for %s", i+1, test.expected, isAllowed, test.name)
+		}
+	}
+}
+
+func TestProxyParse(t *testing.T) {
+	rmFunc, cert, key, ca := getPEMFiles(t)
+	defer rmFunc()
+
+	grpc1 := "proxy . 8.8.8.8:53 {\n protocol grpc " + ca + "\n}"
+	grpc2 := "proxy . 8.8.8.8:53 {\n protocol grpc " + cert + " " + key + "\n}"
+	grpc3 := "proxy . 8.8.8.8:53 {\n protocol grpc " + cert + " " + key + " " + ca + "\n}"
+	grpc4 := "proxy . 8.8.8.8:53 {\n protocol grpc " + key + "\n}"
+
+	tests := []struct {
+		inputUpstreams string
+		shouldErr      bool
+	}{
+		{
+			`proxy . 8.8.8.8:53`,
+			false,
+		},
+		{
+			`proxy 10.0.0.0/24 8.8.8.8:53`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    policy round_robin
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    fail_timeout 5s
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    max_fails 10
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    health_check /health:8080
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    without without
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    except miek.nl example.org 10.0.0.0/24
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    spray
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+    error_option
+}`,
+			true,
+		},
+		{
+			`
+proxy . some_bogus_filename`,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol dns
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol grpc
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol grpc insecure
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol dns force_tcp
+}`,
+			false,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol grpc a b c d
+}`,
+			true,
+		},
+		{
+			grpc1,
+			false,
+		},
+		{
+			grpc2,
+			false,
+		},
+		{
+			grpc3,
+			false,
+		},
+		{
+			grpc4,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol foobar
+}`,
+			true,
+		},
+		{
+			`proxy`,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol foobar
+}`,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	policy
+}`,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	fail_timeout
+}`,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	fail_timeout junky
+}`,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	health_check
+}`,
+			true,
+		},
+		{
+			`
+proxy . 8.8.8.8:53 {
+	protocol dns force
+}`,
+			true,
+		},
+	}
+	for i, test := range tests {
+		c := caddy.NewTestController("dns", test.inputUpstreams)
+		_, err := NewStaticUpstreams(&c.Dispenser)
+		if (err != nil) != test.shouldErr {
+			t.Errorf("Test %d expected no error, got %v for %s", i+1, err, test.inputUpstreams)
+		}
+	}
+}
+
+func TestResolvParse(t *testing.T) {
+	tests := []struct {
+		inputUpstreams string
+		filedata       string
+		shouldErr      bool
+		expected       []string
+	}{
+		{
+			`
+proxy . FILE
+`,
+			`
+nameserver 1.2.3.4
+nameserver 4.3.2.1
+`,
+			false,
+			[]string{"1.2.3.4:53", "4.3.2.1:53"},
+		},
+		{
+			`
+proxy example.com 1.1.1.1:5000
+proxy . FILE
+proxy example.org 2.2.2.2:1234
+`,
+			`
+nameserver 1.2.3.4
+`,
+			false,
+			[]string{"1.1.1.1:5000", "1.2.3.4:53", "2.2.2.2:1234"},
+		},
+		{
+			`
+proxy example.com 1.1.1.1:5000
+proxy . FILE
+proxy example.org 2.2.2.2:1234
+`,
+			`
+junky resolve.conf
+`,
+			false,
+			[]string{"1.1.1.1:5000", "2.2.2.2:1234"},
+		},
+	}
+	for i, tc := range tests {
+
+		path, rm, err := test.TempFile(".", tc.filedata)
+		if err != nil {
+			t.Fatalf("Test %d could not creat temp file %v", i, err)
+		}
+		defer rm()
+
+		config := strings.Replace(tc.inputUpstreams, "FILE", path, -1)
+		c := caddy.NewTestController("dns", config)
+		upstreams, err := NewStaticUpstreams(&c.Dispenser)
+		if (err != nil) != tc.shouldErr {
+			t.Errorf("Test %d expected no error, got %v", i+1, err)
+		}
+		var hosts []string
+		for _, u := range upstreams {
+			for _, h := range u.(*staticUpstream).Hosts {
+				hosts = append(hosts, h.Name)
+			}
+		}
+		if !tc.shouldErr {
+			if len(hosts) != len(tc.expected) {
+				t.Errorf("Test %d expected %d hosts got %d", i+1, len(tc.expected), len(upstreams))
+			} else {
+				ok := true
+				for i, v := range tc.expected {
+					if v != hosts[i] {
+						ok = false
+					}
+				}
+				if !ok {
+					t.Errorf("Test %d expected %v got %v", i+1, tc.expected, upstreams)
+				}
+			}
+		}
+	}
+}
+
+func getPEMFiles(t *testing.T) (rmFunc func(), cert, key, ca string) {
+	tempDir, rmFunc, err := test.WritePEMFiles("")
+	if err != nil {
+		t.Fatalf("Could not write PEM files: %s", err)
+	}
+
+	cert = filepath.Join(tempDir, "cert.pem")
+	key = filepath.Join(tempDir, "key.pem")
+	ca = filepath.Join(tempDir, "ca.pem")
+
+	return
+}