New version

npmproxy/proxy.go

@@ -0,0 +1,95 @@
+package npmproxy
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type Override struct {
+	Namespace   string
+	Upstream    string
+	PackageRoot string
+}
+
+type Proxy struct {
+	ProjectRoot       string
+	Port              int
+	InternalPort      int
+	DefaultRegistry   string
+	Overrides         []Override
+	pkgCachePath      string
+	externalProxyHost string
+	internalProxyHost string
+	internalProxyUrl  string
+}
+
+type ProxyOption func(*Proxy)
+
+func WithPort(port int) ProxyOption {
+	return func(p *Proxy) {
+		p.Port = port
+	}
+}
+
+func WithInternalPort(port int) ProxyOption {
+	return func(p *Proxy) {
+		p.InternalPort = port
+	}
+}
+
+func WithPkgCachePath(path string) ProxyOption {
+	return func(p *Proxy) {
+		p.pkgCachePath = path
+	}
+}
+
+func WithDefaultRegistry(registry string) ProxyOption {
+	return func(p *Proxy) {
+		p.DefaultRegistry = strings.TrimSuffix(registry, "/")
+	}
+}
+
+func New(overrides []Override, projectRoot string, options ...ProxyOption) *Proxy {
+	p := &Proxy{
+		ProjectRoot:     projectRoot,
+		Port:            1234,
+		InternalPort:    1235,
+		DefaultRegistry: "https://registry.npmjs.org",
+		Overrides:       overrides,
+	}
+
+	for _, option := range options {
+		option(p)
+	}
+
+	if p.pkgCachePath == "" {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			homeDir = "."
+		}
+		p.pkgCachePath = filepath.Join(homeDir, ".gowebbuild", "proxy", "cache")
+	}
+
+	p.externalProxyHost = fmt.Sprintf("127.0.0.1:%d", p.Port)
+	p.internalProxyHost = fmt.Sprintf("127.0.0.1:%d", p.InternalPort)
+	p.internalProxyUrl = fmt.Sprintf("http://%s", p.internalProxyHost)
+
+	return p
+}
+
+func (p *Proxy) Start(ctx context.Context) {
+	go p.internalHTTPServer(ctx)
+	p.externalHTTPServer(ctx)
+}
+
+func (p *Proxy) matchingOverride(path string) (*Override, bool) {
+	for _, o := range p.Overrides {
+		if strings.HasPrefix(path, o.Namespace) {
+			return &o, true
+		}
+	}
+	return nil, false
+}