Allow accepting remote connections

Close #3498

  # FZF_API_KEY is required for a non-localhost listen address
  FZF_API_KEY=xxx fzf --listen 0.0.0.0:6266

1 files changed, 9 insertions, 11 deletions

diff --git a/src/options.go b/src/options.go
index b4f74e95..4176292f 100644
--- a/src/options.go
+++ b/src/options.go
@@ -118,7 +118,7 @@ const usage = `usage: fzf [options]
     --read0                Read input delimited by ASCII NUL characters
     --print0               Print output delimited by ASCII NUL characters
     --sync                 Synchronous search for multi-staged filtering
-    --listen[=HTTP_PORT]   Start HTTP server to receive actions (POST /)
+    --listen[=[ADDR:]PORT] Start HTTP server to receive actions (POST /)
     --version              Display version information and exit
 
   Environment variables
@@ -334,7 +334,7 @@ type Options struct {
 	PreviewLabel labelOpts
 	Unicode      bool
 	Tabstop      int
-	ListenPort   *int
+	ListenAddr   *string
 	ClearOnExit  bool
 	Version      bool
 }
@@ -1833,10 +1833,13 @@ func parseOptions(opts *Options, allArgs []string) {
 		case "--tabstop":
 			opts.Tabstop = nextInt(allArgs, &i, "tab stop required")
 		case "--listen":
-			port := optionalNumeric(allArgs, &i, 0)
-			opts.ListenPort = &port
+			given, addr := optionalNextString(allArgs, &i)
+			if !given {
+				addr = defaultListenAddr
+			}
+			opts.ListenAddr = &addr
 		case "--no-listen":
-			opts.ListenPort = nil
+			opts.ListenAddr = nil
 		case "--clear":
 			opts.ClearOnExit = true
 		case "--no-clear":
@@ -1927,8 +1930,7 @@ func parseOptions(opts *Options, allArgs []string) {
 			} else if match, value := optString(arg, "--tabstop="); match {
 				opts.Tabstop = atoi(value)
 			} else if match, value := optString(arg, "--listen="); match {
-				port := atoi(value)
-				opts.ListenPort = &port
+				opts.ListenAddr = &value
 			} else if match, value := optString(arg, "--hscroll-off="); match {
 				opts.HscrollOff = atoi(value)
 			} else if match, value := optString(arg, "--scroll-off="); match {
@@ -1958,10 +1960,6 @@ func parseOptions(opts *Options, allArgs []string) {
 		errorExit("tab stop must be a positive integer")
 	}
 
-	if opts.ListenPort != nil && (*opts.ListenPort < 0 || *opts.ListenPort > 65535) {
-		errorExit("invalid listen port")
-	}
-
 	if len(opts.JumpLabels) == 0 {
 		errorExit("empty jump labels")
 	}