Add support for the --browser option

CMakeLists.txt

@@ -55,6 +55,10 @@ list(APPEND SOURCE_FILES html.h)
 set(INCLUDE_DIRS ${OPENSSL_INCLUDE_DIR} ${LIBWEBSOCKETS_INCLUDE_DIR} ${JSON-C_INCLUDE_DIR})
 set(LINK_LIBS util pthread ${OPENSSL_LIBRARIES} ${LIBWEBSOCKETS_LIBRARIES} ${JSON-C_LIBRARY})
 
+if(WIN32)
+    list(APPEND LINK_LIBS shell32)
+endif()
+
 add_executable(${PROJECT_NAME} ${SOURCE_FILES})
 target_include_directories(${PROJECT_NAME} PUBLIC ${INCLUDE_DIRS})
 target_link_libraries(${PROJECT_NAME} ${LINK_LIBS})

README.md

@@ -77,6 +77,7 @@ OPTIONS:
     --client-option, -t     Send option to client (format: key=value), repeat to add more options
     --check-origin, -O      Do not allow websocket connection from different origin
     --once, -o              Accept only one client and exit on disconnection
+    --browser, -B           Open terminal with the default system browser
     --index, -I             Custom index.html path
     --ssl, -S               Enable SSL
     --ssl-cert, -C          SSL certificate file path

src/server.c

@@ -37,12 +37,13 @@ static const struct option options[] = {
         {"readonly",     no_argument,       NULL, 'R'},
         {"check-origin", no_argument,       NULL, 'O'},
         {"once",         no_argument,       NULL, 'o'},
+        {"browser",      no_argument,       NULL, 'B'},
         {"debug",        required_argument, NULL, 'd'},
         {"version",      no_argument,       NULL, 'v'},
         {"help",         no_argument,       NULL, 'h'},
         {NULL, 0, 0,                              0}
 };
-static const char *opt_string = "p:i:c:u:g:s:r:I:aSC:K:A:Rt:Ood:vh";
+static const char *opt_string = "p:i:c:u:g:s:r:I:aSC:K:A:Rt:OoBd:vh";
 
 void print_help() {
     fprintf(stderr, "ttyd is a tool for sharing terminal over the web\n\n"
@@ -62,6 +63,7 @@ void print_help() {
                     "    --client-option, -t     Send option to client (format: key=value), repeat to add more options\n"
                     "    --check-origin, -O      Do not allow websocket connection from different origin\n"
                     "    --once, -o              Accept only one client and exit on disconnection\n"
+                    "    --browser, -B           Open terminal with the default system browser\n"
                     "    --index, -I             Custom index.html path\n"
                     "    --ssl, -S               Enable SSL\n"
                     "    --ssl-cert, -C          SSL certificate file path\n"
@@ -218,6 +220,7 @@ main(int argc, char **argv) {
 
     int debug_level = LLL_ERR | LLL_WARN | LLL_NOTICE;
     char iface[128] = "";
+    bool browser = false;
     bool ssl = false;
     char cert_path[1024] = "";
     char key_path[1024] = "";
@@ -247,6 +250,9 @@ main(int argc, char **argv) {
             case 'o':
                 server->once = true;
                 break;
+            case 'B':
+                browser = true;
+                break;
             case 'p':
                 info.port = atoi(optarg);
                 if (info.port < 0) {
@@ -426,6 +432,11 @@ main(int argc, char **argv) {
         lwsl_notice("listening on socket %s\n", server->socket_path);
     } else {
         lwsl_notice("listening on port %d\n", info.port);
+        if (browser) {
+            char url[30];
+            sprintf(url, "%s://localhost:%d", ssl ? "https" : "http", info.port);
+            open_uri(url);
+        }
     }
 
     // libwebsockets main loop

src/utils.c

@@ -7,6 +7,11 @@
 #include <string.h>
 #include <signal.h>
 
+#if defined(_WIN32) || defined(__CYGWIN__)
+#include <windows.h>
+#include <shellapi.h>
+#endif
+
 void *
 xmalloc(size_t size) {
     if (size == 0)
@@ -63,6 +68,24 @@ get_sig(const char *sig_name) {
     return -1;
 }
 
+int
+open_uri(char *uri) {
+#ifdef __APPLE__
+    char command[256];
+    sprintf(command, "open %s > /dev/null 2>&1", uri);
+    return system(command);
+#elif defined(_WIN32) || defined(__CYGWIN__)
+    return ShellExecute(0, 0, uri, 0, 0 , SW_SHOW) > 32 ? 0 : 1;
+#else
+    // check if X server is running
+    if (system("xset -q > /dev/null 2>&1"))
+        return 1;
+    char command[256];
+    sprintf(command, "xdg-open %s > /dev/null 2>&1", uri);
+    return system(command);
+#endif
+}
+
 // https://github.com/darkk/redsocks/blob/master/base64.c
 char *
 base64_encode(const unsigned char *buffer, size_t length) {

src/utils.h

@@ -25,6 +25,10 @@ get_sig_name(int sig, char *buf);
 int
 get_sig(const char *sig_name);
 
+// Open uri with the default application of system
+int
+open_uri(char *uri);
+
 // Encode text to base64, the caller should free the returned string
 char *
 base64_encode(const unsigned char *buffer, size_t length);