civetweb/src/main.c

/* Copyright (c) 2004-2013 Sergey Lyubka
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
*/

#if defined(_WIN32)
#define _CRT_SECURE_NO_WARNINGS  /* Disable deprecation warning in VS2005 */
#else
#define _XOPEN_SOURCE 600  /* For PATH_MAX on linux */
#endif

#ifndef IGNORE_UNUSED_RESULT
#define IGNORE_UNUSED_RESULT(a) (void)((a) && 1)
#endif

#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <stdarg.h>
#include <ctype.h>

#include "civetweb.h"

#ifdef _WIN32
#include <windows.h>
#include <winsvc.h>
#include <shlobj.h>

#define getcwd(a,b) _getcwd(a,b)
extern char *_getcwd(char *buf, size_t size);

#ifndef PATH_MAX
#define PATH_MAX MAX_PATH
#endif

#ifndef S_ISDIR
#define S_ISDIR(x) ((x) & _S_IFDIR)
#endif

#define DIRSEP '\\'
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#define sleep(x) Sleep((x) * 1000)
#define WINCDECL __cdecl
#define abs_path(rel, abs, abs_size) _fullpath((abs), (rel), (abs_size))
#else
#include <sys/wait.h>
#include <unistd.h>
#define DIRSEP '/'
#define WINCDECL
#define abs_path(rel, abs, abs_size) realpath((rel), (abs))
#endif /* _WIN32 */

#define MAX_OPTIONS 100
#define MAX_CONF_FILE_LINE_SIZE (8 * 1024)

static int exit_flag;
static char server_name[40];        /* Set by init_server_name() */
static char config_file[PATH_MAX] = ""; /* Set by
                                           process_command_line_arguments() */
static struct mg_context *ctx;      /* Set by start_civetweb() */

#if !defined(CONFIG_FILE)
#define CONFIG_FILE "civetweb.conf"
#endif /* !CONFIG_FILE */

/* backup config file */
#if !defined(CONFIG_FILE2) && defined(LINUX)
#define CONFIG_FILE2 "/usr/local/etc/civetweb.conf"
#endif

static void WINCDECL signal_handler(int sig_num)
{
    exit_flag = sig_num;
}

static void die(const char *fmt, ...)
{
    va_list ap;
    char msg[200] = "";

    va_start(ap, fmt);
    (void) vsnprintf(msg, sizeof(msg) -1, fmt, ap);
    msg[sizeof(msg)-1] = 0;
    va_end(ap);

#if defined(_WIN32)
    MessageBox(NULL, msg, "Error", MB_OK);
#else
    fprintf(stderr, "%s\n", msg);
#endif

    exit(EXIT_FAILURE);
}

static void show_usage_and_exit(void)
{
    const struct mg_option *options;
    int i;

    fprintf(stderr, "Civetweb v%s, built on %s\n",
            mg_version(), __DATE__);
    fprintf(stderr, "Usage:\n");
    fprintf(stderr, "  civetweb -A <htpasswd_file> <realm> <user> <passwd>\n");
    fprintf(stderr, "  civetweb [config_file]\n");
    fprintf(stderr, "  civetweb [-option value ...]\n");
    fprintf(stderr, "\nOPTIONS:\n");

    options = mg_get_valid_options();
    for (i = 0; options[i].name != NULL; i++) {
        fprintf(stderr, "  -%s %s\n",
                options[i].name[i], options[i].default_value == NULL ? "<empty>" : options[i].default_value);
    }
    exit(EXIT_FAILURE);
}

#if defined(_WIN32) || defined(USE_COCOA)
static const char *config_file_top_comment =
    "# Civetweb web server configuration file.\n"
    "# For detailed description of every option, visit\n"
    "# https://github.com/sunsetbrew/civetweb/blob/master/docs/UserManual.md\n"
    "# Lines starting with '#' and empty lines are ignored.\n"
    "# To make a change, remove leading '#', modify option's value,\n"
    "# save this file and then restart Civetweb.\n\n";

static const char *get_url_to_first_open_port(const struct mg_context *ctx)
{
    static char url[100];
    const char *open_ports = mg_get_option(ctx, "listening_ports");
    int a, b, c, d, port, n;

    if (sscanf(open_ports, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &n) == 5) {
        snprintf(url, sizeof(url), "%s://%d.%d.%d.%d:%d",
                 open_ports[n] == 's' ? "https" : "http", a, b, c, d, port);
    } else if (sscanf(open_ports, "%d%n", &port, &n) == 1) {
        snprintf(url, sizeof(url), "%s://localhost:%d",
                 open_ports[n] == 's' ? "https" : "http", port);
    } else {
        snprintf(url, sizeof(url), "%s", "http://localhost:8080");
    }

    return url;
}

static void create_config_file(const char *path)
{
    const struct mg_option *options;
    const char *value;
    FILE *fp;
    int i;

    /* Create config file if it is not present yet */
    if ((fp = fopen(path, "r")) != NULL) {
        fclose(fp);
    } else if ((fp = fopen(path, "a+")) != NULL) {
        fprintf(fp, "%s", config_file_top_comment);
        options = mg_get_valid_options();
        for (i = 0; options[i].name != NULL; i++) {
            value = mg_get_option(ctx, options[i].name);
            fprintf(fp, "# %s %s\n", options[i].name, value ? value : "<value>");
        }
        fclose(fp);
    }
}
#endif

static char *sdup(const char *str)
{
    size_t len;
    char *p;

    len = strlen(str) + 1;
    if ((p = (char *) malloc(len)) != NULL) {
        memcpy(p, str, len);
    }
    return p;
}

static int set_option(char **options, const char *name, const char *value)
{
    int i;

    for (i = 0; i < MAX_OPTIONS - 3; i++) {
        if (options[i] == NULL) {
            options[i] = sdup(name);
            options[i + 1] = sdup(value);
            options[i + 2] = NULL;
            break;
        } else if (!strcmp(options[i], name)) {
            free(options[i + 1]);
            options[i + 1] = sdup(value);
            break;
        }
    }

    if (i == MAX_OPTIONS - 3) {
        die("%s", "Too many options specified");
    }

    /* TODO: check if this option is defined and the correct data type, return 1 (OK) or 0 (false) */
    return 1;
}

static void read_config_file(const char *config_file, char **options)
{
    char line[MAX_CONF_FILE_LINE_SIZE], *p;
    FILE *fp = NULL;
    size_t i, j, cmd_line_opts_start = 1, line_no = 0;

    fp = fopen(config_file, "r");

    /* If config file was set in command line and open failed, die */
    if (cmd_line_opts_start == 2 && fp == NULL) {
        die("Cannot open config file %s: %s", config_file, strerror(errno));
    }

    /* Load config file settings first */
    if (fp != NULL) {
        fprintf(stderr, "Loading config file %s\n", config_file);

        /* Loop over the lines in config file */
        while (fgets(line, sizeof(line), fp) != NULL) {

            if (!line_no && !memcmp(line,"\xEF\xBB\xBF",3)) {
                /* strip UTF-8 BOM */
                p = line+3;
            } else {
                p = line;
            }
            line_no++;

            /* Ignore empty lines and comments */
            for (i = 0; isspace(* (unsigned char *) &line[i]); ) i++;
            if (p[i] == '#' || p[i] == '\0') {
                continue;
            }

            /* Skip spaces, \r and \n at the end of the line */
            for (j = strlen(line)-1; isspace(* (unsigned char *) &line[j]) || iscntrl(* (unsigned char *) &line[j]); ) line[j--]=0;

            /* Find the space character between option name and value */
            for (j=i; !isspace(* (unsigned char *) &line[j]) && (line[j]!=0); ) j++;

            /* Terminate the string - then the string at (line+i) contains the option name */
            line[j] = 0;
            j++;

            /* Trim additional spaces between option name and value - then (line+j) contains the option value */
            while (isspace(line[j])) j++;

            /* Set option */
            if (!set_option(options, line+i, line+j)) {
                printf("%s: line %d is invalid, ignoring it:\n %s",
                       config_file, (int) line_no, p);
            }
        }

        (void) fclose(fp);
    }
}

static void process_command_line_arguments(char *argv[], char **options)
{
    char *p;
    FILE *fp = NULL;
    size_t i, cmd_line_opts_start = 1, line_no = 0;

    /* Should we use a config file ? */
    if (argv[1] != NULL && argv[1][0] != '-') {
        snprintf(config_file, sizeof(config_file), "%s", argv[1]);
        cmd_line_opts_start = 2;
    } else if ((p = strrchr(argv[0], DIRSEP)) == NULL) {
        /* No command line flags specified. Look where binary lives */
        snprintf(config_file, sizeof(config_file)-1, "%s", CONFIG_FILE);
        config_file[sizeof(config_file)-1] = 0;
    } else {
        snprintf(config_file, sizeof(config_file)-1, "%.*s%c%s",
                 (int) (p - argv[0]), argv[0], DIRSEP, CONFIG_FILE);
        config_file[sizeof(config_file)-1] = 0;
    }

#ifdef CONFIG_FILE2
    fp = fopen(config_file, "r");

    /* try alternate config file */
    if (fp == NULL) {
        fp = fopen(CONFIG_FILE2, "r");
        if (fp != NULL) {
            strcpy(config_file, CONFIG_FILE2);
        }
    }
    if (fp != NULL) {
        fclose(fp);
    }
#endif

    /* read all configurations from a config file */
    (void)read_config_file(config_file, options);

    /* If we're under MacOS and started by launchd, then the second
       argument is process serial number, -psn_.....
       In this case, don't process arguments at all. */
    if (argv[1] == NULL || memcmp(argv[1], "-psn_", 5) != 0) {
        /* Handle command line flags.
           They override config file and default settings. */
        for (i = cmd_line_opts_start; argv[i] != NULL; i += 2) {
            if (argv[i][0] != '-' || argv[i + 1] == NULL) {
                show_usage_and_exit();
            }
            set_option(options, &argv[i][1], argv[i + 1]);
        }
    }
}

static void init_server_name(void)
{
    snprintf(server_name, sizeof(server_name), "Civetweb v%s",
             mg_version());
}

static int log_message(const struct mg_connection *conn, const char *message)
{
    (void) conn;
    printf("%s\n", message);
    return 0;
}

static int is_path_absolute(const char *path)
{
#ifdef _WIN32
    return path != NULL &&
           ((path[0] == '\\' && path[1] == '\\') ||  /* UNC path, e.g.
                                                        \\server\dir */
            (isalpha(path[0]) && path[1] == ':' && path[2] == '\\'));  /* E.g. X:\dir */
#else
    return path != NULL && path[0] == '/';
#endif
}

static char *get_option(char **options, const char *option_name)
{
    int i;

    for (i = 0; options[i] != NULL; i++)
        if (!strcmp(options[i], option_name))
            return options[i + 1];

    return NULL;
}

static void verify_existence(char **options, const char *option_name,
                             int must_be_dir)
{
    struct stat st;
    const char *path = get_option(options, option_name);

#ifdef _WIN32
    wchar_t wbuf[1024];
    char mbbuf[1024];
    int len;

    if (path) {
        memset(wbuf, 0, sizeof(wbuf));
        memset(mbbuf, 0, sizeof(mbbuf));
        len = MultiByteToWideChar(CP_UTF8, 0, path, -1, wbuf, (int) sizeof(wbuf)/sizeof(wbuf[0])-1);
        wcstombs(mbbuf, wbuf, sizeof(mbbuf)-1);
        path = mbbuf;
    }
#endif

    if (path != NULL && (stat(path, &st) != 0 ||
                         ((S_ISDIR(st.st_mode) ? 1 : 0) != must_be_dir))) {
        die("Invalid path for %s: [%s]: (%s). Make sure that path is either "
            "absolute, or it is relative to civetweb executable.",
            option_name, path, strerror(errno));
    }
}

static void set_absolute_path(char *options[], const char *option_name,
                              const char *path_to_civetweb_exe)
{
    char path[PATH_MAX] = "", abs[PATH_MAX] = "", *option_value;
    const char *p;

    /* Check whether option is already set */
    option_value = get_option(options, option_name);

    /* If option is already set and it is an absolute path,
       leave it as it is -- it's already absolute. */
    if (option_value != NULL && !is_path_absolute(option_value)) {
        /* Not absolute. Use the directory where civetweb executable lives
           be the relative directory for everything.
           Extract civetweb executable directory into path. */
        if ((p = strrchr(path_to_civetweb_exe, DIRSEP)) == NULL) {
            IGNORE_UNUSED_RESULT(getcwd(path, sizeof(path)));
        } else {
            snprintf(path, sizeof(path)-1, "%.*s", (int) (p - path_to_civetweb_exe),
                     path_to_civetweb_exe);
            path[sizeof(path)-1] = 0;
        }

        strncat(path, "/", sizeof(path) - 1);
        strncat(path, option_value, sizeof(path) - 1);

        /* Absolutize the path, and set the option */
        IGNORE_UNUSED_RESULT(abs_path(path, abs, sizeof(abs)));
        set_option(options, option_name, abs);
    }
}

static void start_civetweb(int argc, char *argv[])
{
    struct mg_callbacks callbacks;
    char *options[MAX_OPTIONS];
    int i;

    /* Edit passwords file if -A option is specified */
    if (argc > 1 && !strcmp(argv[1], "-A")) {
        if (argc != 6) {
            show_usage_and_exit();
        }
        exit(mg_modify_passwords_file(argv[2], argv[3], argv[4], argv[5]) ?
             EXIT_SUCCESS : EXIT_FAILURE);
    }

    /* Show usage if -h or --help options are specified */
    if (argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))) {
        show_usage_and_exit();
    }

    options[0] = NULL;
    set_option(options, "document_root", ".");

    /* Update config based on command line arguments */
    process_command_line_arguments(argv, options);

    /* Make sure we have absolute paths for files and directories */
    set_absolute_path(options, "document_root", argv[0]);
    set_absolute_path(options, "put_delete_auth_file", argv[0]);
    set_absolute_path(options, "cgi_interpreter", argv[0]);
    set_absolute_path(options, "access_log_file", argv[0]);
    set_absolute_path(options, "error_log_file", argv[0]);
    set_absolute_path(options, "global_auth_file", argv[0]);
#ifdef USE_LUA
    set_absolute_path(options, "lua_preload_file", argv[0]);
#endif
    set_absolute_path(options, "ssl_certificate", argv[0]);

    /* Make extra verification for certain options */
    verify_existence(options, "document_root", 1);
    verify_existence(options, "cgi_interpreter", 0);
    verify_existence(options, "ssl_certificate", 0);
#ifdef USE_LUA
    verify_existence(options, "lua_preload_file", 0);
#endif

    /* Setup signal handler: quit on Ctrl-C */
    signal(SIGTERM, signal_handler);
    signal(SIGINT, signal_handler);

    /* Start Civetweb */
    memset(&callbacks, 0, sizeof(callbacks));
    callbacks.log_message = &log_message;
    ctx = mg_start(&callbacks, NULL, (const char **) options);
    for (i = 0; options[i] != NULL; i++) {
        free(options[i]);
    }

    if (ctx == NULL) {
        die("%s", "Failed to start Civetweb.");
    }
}

#ifdef _WIN32
enum {
    ID_ICON = 100, ID_QUIT, ID_SETTINGS, ID_SEPARATOR, ID_INSTALL_SERVICE,
    ID_REMOVE_SERVICE, ID_STATIC, ID_GROUP,
    ID_SAVE, ID_RESET_DEFAULTS, ID_RESET_FILE, ID_RESET_ACTIVE,
    ID_STATUS, ID_CONNECT,

    /* All dynamically created text boxes for options have IDs starting from
       ID_CONTROLS, incremented by one. */
    ID_CONTROLS = 200,

    /* Text boxes for files have "..." buttons to open file browser. These
       buttons have IDs that are ID_FILE_BUTTONS_DELTA higher than associated
       text box ID. */
    ID_FILE_BUTTONS_DELTA = 1000
};
static HICON hIcon;
static SERVICE_STATUS ss;
static SERVICE_STATUS_HANDLE hStatus;
static const char *service_magic_argument = "--";
static NOTIFYICONDATA TrayIcon;

static void WINAPI ControlHandler(DWORD code)
{
    if (code == SERVICE_CONTROL_STOP || code == SERVICE_CONTROL_SHUTDOWN) {
        ss.dwWin32ExitCode = 0;
        ss.dwCurrentState = SERVICE_STOPPED;
    }
    SetServiceStatus(hStatus, &ss);
}

static void WINAPI ServiceMain(void)
{
    ss.dwServiceType = SERVICE_WIN32;
    ss.dwCurrentState = SERVICE_RUNNING;
    ss.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;

    hStatus = RegisterServiceCtrlHandler(server_name, ControlHandler);
    SetServiceStatus(hStatus, &ss);

    while (ss.dwCurrentState == SERVICE_RUNNING) {
        Sleep(1000);
    }
    mg_stop(ctx);

    ss.dwCurrentState = SERVICE_STOPPED;
    ss.dwWin32ExitCode = (DWORD) -1;
    SetServiceStatus(hStatus, &ss);
}


static void show_error(void)
{
    char buf[256];
    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                  NULL, GetLastError(),
                  MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                  buf, sizeof(buf), NULL);
    MessageBox(NULL, buf, "Error", MB_OK);
}

static void *align(void *ptr, DWORD alig)
{
    ULONG ul = (ULONG) ptr;
    ul += alig;
    ul &= ~alig;
    return ((void *) ul);
}

/*
static int is_boolean_option(const char *option_name)
{
    return !strcmp(option_name, "enable_directory_listing") ||
           !strcmp(option_name, "enable_keep_alive");
}

static int is_filename_option(const char *option_name)
{
    return !strcmp(option_name, "cgi_interpreter") ||
           !strcmp(option_name, "global_auth_file") ||
           !strcmp(option_name, "put_delete_auth_file") ||
           !strcmp(option_name, "access_log_file") ||
           !strcmp(option_name, "error_log_file") ||
#ifdef USE_LUA
           !strcmp(option_name, "lua_preload_file") ||
#endif
           !strcmp(option_name, "ssl_certificate");
}

static int is_directory_option(const char *option_name)
{
    return !strcmp(option_name, "document_root") ||
#if defined(USE_WEBSOCKET)
           !strcmp(option_name, "websocket_root") ||
#endif
           0;
}

static int is_numeric_options(const char *option_name)
{
    return !strcmp(option_name, "num_threads") ||
           !strcmp(option_name, "request_timeout_ms");
}
*/

static void save_config(HWND hDlg, FILE *fp)
{
    char value[2000] = "";
    const char *default_value;
    const struct mg_option *options;
    int i, id;

    fprintf(fp, "%s", config_file_top_comment);
    options = mg_get_valid_options();
    for (i = 0; options[i].name != NULL; i++) {
        id = ID_CONTROLS + i;
        if (options[i].type == CONFIG_TYPE_BOOLEAN) {
            snprintf(value, sizeof(value)-1, "%s",
                     IsDlgButtonChecked(hDlg, id) ? "yes" : "no");
            value[sizeof(value)-1] = 0;
        } else {
            GetDlgItemText(hDlg, id, value, sizeof(value));
        }
        default_value = options[i].default_value == NULL ? "" : options[i].default_value;
        /* If value is the same as default, skip it */
        if (strcmp(value, default_value) != 0) {
            fprintf(fp, "%s %s\n", options[i].name, value);
        }
    }
}

static BOOL CALLBACK DlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM lP)
{
    FILE *fp;
    int i, j;
    const char *name, *value;
    const struct mg_option *default_options = mg_get_valid_options();
    char *file_options[MAX_OPTIONS] = {0};

    switch (msg) {
    case WM_CLOSE:
        DestroyWindow(hDlg);
        break;

    case WM_COMMAND:
        switch (LOWORD(wParam)) {

        case ID_SAVE:
            EnableWindow(GetDlgItem(hDlg, ID_SAVE), FALSE);
            if ((fp = fopen(config_file, "w+")) != NULL) {
                save_config(hDlg, fp);
                fclose(fp);
                mg_stop(ctx);
                start_civetweb(__argc, __argv);
            }
            EnableWindow(GetDlgItem(hDlg, ID_SAVE), TRUE);
            break;

        case ID_RESET_DEFAULTS:
            for (i = 0; default_options[i].name != NULL; i++) {
                name = default_options[i].name;
                value = default_options[i].default_value == NULL ? "" : default_options[i].default_value;
                if (default_options[i].type == CONFIG_TYPE_BOOLEAN) {
                    CheckDlgButton(hDlg, ID_CONTROLS + i, !strcmp(value, "yes") ?
                                   BST_CHECKED : BST_UNCHECKED);
                } else {
                    SetWindowText(GetDlgItem(hDlg, ID_CONTROLS + i), value);
                }
            }
            break;

        case ID_RESET_FILE:
            read_config_file(config_file, file_options);
            for (i = 0; default_options[i].name != NULL; i++) {
                name = default_options[i].name;
                value = default_options[i].default_value;
                for (j = 0; file_options[j * 2] != NULL; j++) {
                    if (!strcmp(name, file_options[j * 2])) {
                        value = file_options[j * 2 + 1];
                    }
                }
                if (value == NULL) {
                    value = "";
                }
                if (default_options[i].type == CONFIG_TYPE_BOOLEAN) {
                    CheckDlgButton(hDlg, ID_CONTROLS + i, !strcmp(value, "yes") ? BST_CHECKED : BST_UNCHECKED);
                } else {
                    SetWindowText(GetDlgItem(hDlg, ID_CONTROLS + i), value);
                }
            }
            for (i = 0; i<MAX_OPTIONS; i++) {
                free(file_options[i]);
            }
            break;

        case ID_RESET_ACTIVE:
            for (i = 0; default_options[i].name != NULL; i++) {
                name = default_options[i].name;
                value = mg_get_option(ctx, name);
                if (default_options[i].type == CONFIG_TYPE_BOOLEAN) {
                    CheckDlgButton(hDlg, ID_CONTROLS + i, !strcmp(value, "yes") ?
                                   BST_CHECKED : BST_UNCHECKED);
                } else {
                    SetWindowText(GetDlgItem(hDlg, ID_CONTROLS + i), value);
                }
            }
            break;
        }

        for (i = 0; default_options[i].name != NULL; i++) {
            name = default_options[i].name;
            if ((is_filename_option(name) || is_directory_option(name)) &&
                LOWORD(wParam) == ID_CONTROLS + i + ID_FILE_BUTTONS_DELTA) {
                OPENFILENAME of;
                BROWSEINFO bi;
                char path[PATH_MAX] = "";

                memset(&of, 0, sizeof(of));
                of.lStructSize = sizeof(of);
                of.hwndOwner = (HWND) hDlg;
                of.lpstrFile = path;
                of.nMaxFile = sizeof(path);
                of.lpstrInitialDir = mg_get_option(ctx, "document_root");
                of.Flags = OFN_CREATEPROMPT | OFN_NOCHANGEDIR | OFN_HIDEREADONLY;

                memset(&bi, 0, sizeof(bi));
                bi.hwndOwner = (HWND) hDlg;
                bi.lpszTitle = "Choose WWW root directory:";
                bi.ulFlags = BIF_RETURNONLYFSDIRS;

                if (is_directory_option(name)) {
                    SHGetPathFromIDList(SHBrowseForFolder(&bi), path);
                } else {
                    GetOpenFileName(&of);
                }

                if (path[0] != '\0') {
                    SetWindowText(GetDlgItem(hDlg, ID_CONTROLS + i), path);
                }
            }
        }
        break;

    case WM_INITDIALOG:
        SendMessage(hDlg, WM_SETICON,(WPARAM) ICON_SMALL, (LPARAM) hIcon);
        SendMessage(hDlg, WM_SETICON,(WPARAM) ICON_BIG, (LPARAM) hIcon);
        SetWindowText(hDlg, "Civetweb settings");
        SetFocus(GetDlgItem(hDlg, ID_SAVE));
        for (i = 0; default_options[i].name != NULL; i++) {
            name = default_options[i].name;
            value = mg_get_option(ctx, name);
            if (default_options[i].type == CONFIG_TYPE_BOOLEAN) {
                CheckDlgButton(hDlg, ID_CONTROLS + i, !strcmp(value, "yes") ?
                               BST_CHECKED : BST_UNCHECKED);
            } else {
                SetDlgItemText(hDlg, ID_CONTROLS + i, value == NULL ? "" : value);
            }
        }
        break;

    default:
        break;
    }

    return FALSE;
}

static void add_control(unsigned char **mem, DLGTEMPLATE *dia, WORD type,
                        DWORD id, DWORD style, WORD x, WORD y,
                        WORD cx, WORD cy, const char *caption)
{
    DLGITEMTEMPLATE *tp;
    LPWORD p;

    dia->cdit++;

    *mem = align(*mem, 3);
    tp = (DLGITEMTEMPLATE *) *mem;

    tp->id = (WORD)id;
    tp->style = style;
    tp->dwExtendedStyle = 0;
    tp->x = x;
    tp->y = y;
    tp->cx = cx;
    tp->cy = cy;

    p = align(*mem + sizeof(*tp), 1);
    *p++ = 0xffff;
    *p++ = type;

    while (*caption != '\0') {
        *p++ = (WCHAR) *caption++;
    }
    *p++ = 0;
    p = align(p, 1);

    *p++ = 0;
    *mem = (unsigned char *) p;
}

static void show_settings_dialog()
{
#define HEIGHT 15
#define WIDTH 460
#define LABEL_WIDTH 90

    unsigned char mem[4096], *p;
    const struct mg_option *options;
    DWORD style;
    DLGTEMPLATE *dia = (DLGTEMPLATE *) mem;
    WORD i, cl, x, y, width, nelems = 0;
    static int guard = 0; /* test if dialog is already open */

    static struct {
        DLGTEMPLATE template; /* 18 bytes */
        WORD menu, class;
        wchar_t caption[1];
        WORD fontsiz;
        wchar_t fontface[7];
    } dialog_header = {{
            WS_CAPTION | WS_POPUP | WS_SYSMENU | WS_VISIBLE |
            DS_SETFONT | WS_DLGFRAME, WS_EX_TOOLWINDOW, 0, 200, 200, WIDTH, 0
        },
        0, 0, L"", 8, L"Tahoma"
    };

    if (guard == 0) {
        guard++;
    } else {
        return;
    }

    (void) memset(mem, 0, sizeof(mem));
    (void) memcpy(mem, &dialog_header, sizeof(dialog_header));
    p = mem + sizeof(dialog_header);

    options = mg_get_valid_options();
    for (i = 0; options[i].name != NULL; i++) {
        style = WS_CHILD | WS_VISIBLE | WS_TABSTOP;
        x = 10 + (WIDTH / 2) * (nelems % 2);
        y = (nelems/2 + 1) * HEIGHT + 5;
        width = WIDTH / 2 - 20 - LABEL_WIDTH;
        if (is_numeric_options(options[i].name)) {
            style |= ES_NUMBER;
            cl = 0x81;
            style |= WS_BORDER | ES_AUTOHSCROLL;
        } else if (options[i].type == CONFIG_TYPE_BOOLEAN) {
            cl = 0x80;
            style |= BS_AUTOCHECKBOX;
        } else if (is_filename_option(options[i].name) ||
                   is_directory_option(options[i].name)) {
            style |= WS_BORDER | ES_AUTOHSCROLL;
            width -= 20;
            cl = 0x81;
            add_control(&p, dia, 0x80,
                        ID_CONTROLS + i + ID_FILE_BUTTONS_DELTA,
                        WS_VISIBLE | WS_CHILD | BS_PUSHBUTTON,
                        (WORD) (x + width + LABEL_WIDTH + 5),
                        y, 15, 12, "...");
        } else {
            cl = 0x81;
            style |= WS_BORDER | ES_AUTOHSCROLL;
        }
        add_control(&p, dia, 0x82, ID_STATIC, WS_VISIBLE | WS_CHILD,
                    x, y, LABEL_WIDTH, HEIGHT, options[i].name);
        add_control(&p, dia, cl, ID_CONTROLS + i, style,
                    (WORD) (x + LABEL_WIDTH), y, width, 12, "");
        nelems++;
    }

    y = (WORD) (((nelems + 1) / 2 + 1) * HEIGHT + 5);
    add_control(&p, dia, 0x80, ID_GROUP, WS_CHILD | WS_VISIBLE |
                BS_GROUPBOX, 5, 5, WIDTH - 10, y, " Settings ");
    y += 10;
    add_control(&p, dia, 0x80, ID_SAVE,
                WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | WS_TABSTOP,
                WIDTH - 70, y, 65, 12, "Save Settings");
    add_control(&p, dia, 0x80, ID_RESET_DEFAULTS,
                WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | WS_TABSTOP,
                WIDTH - 140, y, 65, 12, "Reset to defaults");
    add_control(&p, dia, 0x80, ID_RESET_FILE,
                WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | WS_TABSTOP,
                WIDTH - 210, y, 65, 12, "Reload from file");
    add_control(&p, dia, 0x80, ID_RESET_ACTIVE,
                WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | WS_TABSTOP,
                WIDTH - 280, y, 65, 12, "Reload active");
    add_control(&p, dia, 0x82, ID_STATIC,
                WS_CHILD | WS_VISIBLE | WS_DISABLED,
                5, y, 100, 12, server_name);

    dia->cy = ((nelems + 1) / 2 + 1) * HEIGHT + 30;
    DialogBoxIndirectParam(NULL, dia, NULL, DlgProc, (LPARAM) NULL);
    guard--;
}

static int manage_service(int action)
{
    static const char *service_name = "Civetweb";
    SC_HANDLE hSCM = NULL, hService = NULL;
    SERVICE_DESCRIPTION descr = {server_name};
    char path[PATH_MAX + 20] = "";/* Path to executable plus magic argument */
    int success = 1;

    if ((hSCM = OpenSCManager(NULL, NULL, action == ID_INSTALL_SERVICE ?
                              GENERIC_WRITE : GENERIC_READ)) == NULL) {
        success = 0;
        show_error();
    } else if (action == ID_INSTALL_SERVICE) {
        path[sizeof(path)-1] = 0;
        GetModuleFileName(NULL, path, sizeof(path)-1);
        strncat(path, " ", sizeof(path)-1);
        strncat(path, service_magic_argument, sizeof(path)-1);
        hService = CreateService(hSCM, service_name, service_name,
                                 SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS,
                                 SERVICE_AUTO_START, SERVICE_ERROR_NORMAL,
                                 path, NULL, NULL, NULL, NULL, NULL);
        if (hService) {
            ChangeServiceConfig2(hService, SERVICE_CONFIG_DESCRIPTION, &descr);
        } else {
            show_error();
        }
    } else if (action == ID_REMOVE_SERVICE) {
        if ((hService = OpenService(hSCM, service_name, DELETE)) == NULL ||
            !DeleteService(hService)) {
            show_error();
        }
    } else if ((hService = OpenService(hSCM, service_name,
                                       SERVICE_QUERY_STATUS)) == NULL) {
        success = 0;
    }

    if (hService)
        CloseServiceHandle(hService);
    if (hSCM)
        CloseServiceHandle(hSCM);

    return success;
}

static LRESULT CALLBACK WindowProc(HWND hWnd, UINT msg, WPARAM wParam,
                                   LPARAM lParam)
{
    static SERVICE_TABLE_ENTRY service_table[] = {
        {server_name, (LPSERVICE_MAIN_FUNCTION) ServiceMain},
        {NULL, NULL}
    };
    int service_installed;
    char buf[200], *service_argv[] = {__argv[0], NULL};
    POINT pt;
    HMENU hMenu;
    static UINT s_uTaskbarRestart; /* for taskbar creation */

    switch (msg) {
    case WM_CREATE:
        if (__argv[1] != NULL &&
            !strcmp(__argv[1], service_magic_argument)) {
            start_civetweb(1, service_argv);
            StartServiceCtrlDispatcher(service_table);
            exit(EXIT_SUCCESS);
        } else {
            start_civetweb(__argc, __argv);
            s_uTaskbarRestart = RegisterWindowMessage(TEXT("TaskbarCreated"));
        }
        break;
    case WM_COMMAND:
        switch (LOWORD(wParam)) {
        case ID_QUIT:
            mg_stop(ctx);
            Shell_NotifyIcon(NIM_DELETE, &TrayIcon);
            PostQuitMessage(0);
            return 0;
        case ID_SETTINGS:
            show_settings_dialog();
            break;
        case ID_INSTALL_SERVICE:
        case ID_REMOVE_SERVICE:
            manage_service(LOWORD(wParam));
            break;
        case ID_CONNECT:
            printf("[%s]\n", get_url_to_first_open_port(ctx));
            ShellExecute(NULL, "open", get_url_to_first_open_port(ctx),
                         NULL, NULL, SW_SHOW);
            break;
        }
        break;
    case WM_USER:
        switch (lParam) {
        case WM_RBUTTONUP:
        case WM_LBUTTONUP:
        case WM_LBUTTONDBLCLK:
            hMenu = CreatePopupMenu();
            AppendMenu(hMenu, MF_STRING | MF_GRAYED, ID_SEPARATOR, server_name);
            AppendMenu(hMenu, MF_SEPARATOR, ID_SEPARATOR, "");
            service_installed = manage_service(0);
            snprintf(buf, sizeof(buf)-1, "NT service: %s installed",
                     service_installed ? "" : "not");
            buf[sizeof(buf)-1] = 0;
            AppendMenu(hMenu, MF_STRING | MF_GRAYED, ID_SEPARATOR, buf);
            AppendMenu(hMenu, MF_STRING | (service_installed ? MF_GRAYED : 0),
                       ID_INSTALL_SERVICE, "Install service");
            AppendMenu(hMenu, MF_STRING | (!service_installed ? MF_GRAYED : 0),
                       ID_REMOVE_SERVICE, "Deinstall service");
            AppendMenu(hMenu, MF_SEPARATOR, ID_SEPARATOR, "");
            AppendMenu(hMenu, MF_STRING, ID_CONNECT, "Start browser");
            AppendMenu(hMenu, MF_STRING, ID_SETTINGS, "Edit Settings");
            AppendMenu(hMenu, MF_SEPARATOR, ID_SEPARATOR, "");
            AppendMenu(hMenu, MF_STRING, ID_QUIT, "Exit");
            GetCursorPos(&pt);
            SetForegroundWindow(hWnd);
            TrackPopupMenu(hMenu, 0, pt.x, pt.y, 0, hWnd, NULL);
            PostMessage(hWnd, WM_NULL, 0, 0);
            DestroyMenu(hMenu);
            break;
        }
        break;
    case WM_CLOSE:
        mg_stop(ctx);
        Shell_NotifyIcon(NIM_DELETE, &TrayIcon);
        PostQuitMessage(0);
        return 0;/* We've just sent our own quit message, with proper hwnd. */
    default:
        if (msg==s_uTaskbarRestart)
            Shell_NotifyIcon(NIM_ADD, &TrayIcon);
    }

    return DefWindowProc(hWnd, msg, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR cmdline, int show)
{
    WNDCLASS cls;
    HWND hWnd;
    MSG msg;

    init_server_name();
    memset(&cls, 0, sizeof(cls));
    cls.lpfnWndProc = (WNDPROC) WindowProc;
    cls.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    cls.lpszClassName = server_name;

    RegisterClass(&cls);
    hWnd = CreateWindow(cls.lpszClassName, server_name, WS_OVERLAPPEDWINDOW,
                        0, 0, 0, 0, NULL, NULL, NULL, NULL);
    ShowWindow(hWnd, SW_HIDE);

    TrayIcon.cbSize = sizeof(TrayIcon);
    TrayIcon.uID = ID_ICON;
    TrayIcon.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
    TrayIcon.hIcon = hIcon = LoadImage(GetModuleHandle(NULL),
                                       MAKEINTRESOURCE(ID_ICON),
                                       IMAGE_ICON, 16, 16, 0);
    TrayIcon.hWnd = hWnd;
    snprintf(TrayIcon.szTip, sizeof(TrayIcon.szTip), "%s", server_name);
    TrayIcon.uCallbackMessage = WM_USER;
    Shell_NotifyIcon(NIM_ADD, &TrayIcon);

    while (GetMessage(&msg, hWnd, 0, 0) > 0) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    /* Return the WM_QUIT value. */
    return (int) msg.wParam;
}
#elif defined(USE_COCOA)
#import <Cocoa/Cocoa.h>

@interface Civetweb :
NSObject<NSApplicationDelegate>
- (void) openBrowser;
- (void) shutDown;
@end

@implementation Civetweb
- (void) openBrowser {
    [[NSWorkspace sharedWorkspace]
openURL:[NSURL URLWithString:
[NSString stringWithUTF8String:get_url_to_first_open_port(ctx)]]];
}
- (void) editConfig {
    create_config_file(config_file);
    [[NSWorkspace sharedWorkspace]
openFile:[NSString stringWithUTF8String:config_file]
withApplication:@"TextEdit"];
}
- (void)shutDown {
[NSApp terminate:nil];
}
@end

int main(int argc, char *argv[])
{
    init_server_name();
    start_civetweb(argc, argv);

    [NSAutoreleasePool new];
    [NSApplication sharedApplication];

    /* Add delegate to process menu item actions */
    Civetweb *myDelegate = [[Civetweb alloc] autorelease];
[NSApp setDelegate: myDelegate];

    /* Run this app as agent */
    ProcessSerialNumber psn = { 0, kCurrentProcess };
    TransformProcessType(&psn, kProcessTransformToBackgroundApplication);
    SetFrontProcess(&psn);

    /* Add status bar menu */
    id menu = [[NSMenu new] autorelease];

    /* Add version menu item */
[menu addItem:[[[NSMenuItem alloc]
                    /*initWithTitle:[NSString stringWithFormat:@"%s", server_name]*/
                initWithTitle:[NSString stringWithUTF8String:server_name]
                action:@selector(noexist) keyEquivalent:@""] autorelease]];

    /* Add configuration menu item */
[menu addItem:[[[NSMenuItem alloc]
                initWithTitle:@"Edit configuration"
                action:@selector(editConfig) keyEquivalent:@""] autorelease]];

    /* Add connect menu item */
[menu addItem:[[[NSMenuItem alloc]
                initWithTitle:@"Open web root in a browser"
                action:@selector(openBrowser) keyEquivalent:@""] autorelease]];

    /* Separator */
[menu addItem:[NSMenuItem separatorItem]];

    /* Add quit menu item */
[menu addItem:[[[NSMenuItem alloc]
                initWithTitle:@"Quit"
                action:@selector(shutDown) keyEquivalent:@"q"] autorelease]];

    /* Attach menu to the status bar */
    id item = [[[NSStatusBar systemStatusBar]
            statusItemWithLength:NSVariableStatusItemLength] retain];
[item setHighlightMode:YES];
[item setImage:[NSImage imageNamed:@"civetweb_22x22.png"]];
[item setMenu:menu];

    /* Run the app */
[NSApp activateIgnoringOtherApps:YES];
    [NSApp run];

    mg_stop(ctx);

    return EXIT_SUCCESS;
}
#else
int main(int argc, char *argv[])
{
    init_server_name();
    start_civetweb(argc, argv);
    printf("%s started on port(s) %s with web root [%s]\n",
           server_name, mg_get_option(ctx, "listening_ports"),
           mg_get_option(ctx, "document_root"));
    while (exit_flag == 0) {
        sleep(1);
    }
    printf("Exiting on signal %d, waiting for all threads to finish...",
           exit_flag);
    fflush(stdout);
    mg_stop(ctx);
    printf("%s", " done.\n");

    return EXIT_SUCCESS;
}
#endif /* _WIN32 */