add proxy settings

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

back/internal/search/manager.go

@@ -10,6 +10,7 @@ import (
 	"github.com/google/uuid"
 
 	"github.com/anotherhadi/iknowyou/config"
+	"github.com/anotherhadi/iknowyou/internal/proxy"
 	"github.com/anotherhadi/iknowyou/internal/tools"
 )
 
@@ -66,6 +67,24 @@ func (m *Manager) Start(
 
 	ctx, cancel := context.WithCancel(parentCtx)
 
+	// Inject proxy-aware HTTP client into context.
+	if httpClient, err := proxy.NewClient(cfg.Proxies); err != nil {
+		cancel()
+		return nil, fmt.Errorf("manager: building proxy client: %w", err)
+	} else if httpClient != nil {
+		ctx = proxy.WithClient(ctx, httpClient)
+	}
+
+	// Generate proxychains config for external binary tools.
+	var proxychainsCleanup func()
+	if confPath, cleanup, err := proxy.WriteProxychainsConf(cfg.Proxies); err != nil {
+		cancel()
+		return nil, fmt.Errorf("manager: writing proxychains config: %w", err)
+	} else if confPath != "" {
+		ctx = proxy.WithProxychainsConf(ctx, confPath)
+		proxychainsCleanup = cleanup
+	}
+
 	s := &Search{
 		ID:           uuid.NewString(),
 		Target:       target,
@@ -81,7 +100,7 @@ func (m *Manager) Start(
 	m.searches[s.ID] = s
 	m.mu.Unlock()
 
-	go m.runAll(ctx, s, activeTools)
+	go m.runAll(ctx, s, activeTools, proxychainsCleanup)
 
 	return s, nil
 }
@@ -208,7 +227,10 @@ func (m *Manager) instantiate(cfg *config.Config, inputType tools.InputType, pro
 	return runners, statuses, nil
 }
 
-func (m *Manager) runAll(ctx context.Context, s *Search, runners []tools.ToolRunner) {
+func (m *Manager) runAll(ctx context.Context, s *Search, runners []tools.ToolRunner, cleanup func()) {
+	if cleanup != nil {
+		defer cleanup()
+	}
 	var wg sync.WaitGroup
 	for _, tool := range runners {
 		wg.Add(1)