source: trunk/third/evolution/e-util/e-url.c @ 16787

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/*
 * e-url.c
 *
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Developed by Jon Trowbridge <trow@ximian.com>
 *              Rodrigo Moya   <rodrigo@ximian.com>
 */

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

#include <config.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "e-url.h"

char *
e_url_shroud (const char *url)
{
        const char *first_colon = NULL;
        const char *last_at = NULL;
        const char *p;
        char *shrouded;
        
        if (url == NULL)
                return NULL;

        /* Skip past the moniker */
        for (p = url; *p && *p != ':'; ++p);
        if (*p)
                ++p;

        while (*p) {
                if (first_colon == NULL && *p == ':')
                        first_colon = p;
                if (*p == '@')
                        last_at = p;
                ++p;
        }

        if (first_colon && last_at && first_colon < last_at) {
                shrouded = g_strdup_printf ("%.*s%s", first_colon - url, url, last_at);
        } else {
                shrouded = g_strdup (url);
        }

        return shrouded;
}

gboolean
e_url_equal (const char *url1, const char *url2)
{
        char *shroud1 = e_url_shroud (url1);
        char *shroud2 = e_url_shroud (url2);
        gint len1, len2;
        gboolean rv;

        if (shroud1 == NULL || shroud2 == NULL) {
                rv = (shroud1 == shroud2);
        } else {
                len1 = strlen (shroud1);
                len2 = strlen (shroud2);

                rv = !strncmp (shroud1, shroud2, MIN (len1, len2));
        }

        g_free (shroud1);
        g_free (shroud2);

        return rv;
}

#define HEXVAL(c) (isdigit (c) ? (c) - '0' : tolower (c) - 'a' + 10)

static void
uri_decode (char *part)
{
        guchar *s, *d;

        s = d = (guchar *)part;
        while (*s) {
                if (*s == '%') {
                        if (isxdigit (s[1]) && isxdigit (s[2])) {
                                *d++ = HEXVAL (s[1]) * 16 + HEXVAL (s[2]);
                                s += 3;
                        } else
                                *d++ = *s++;
                } else
                        *d++ = *s++;
        }
        *d = '\0';
}

EUri *
e_uri_new (const char *uri_string)
{
        EUri *uri;
        const char *end, *hash, *colon, *semi, *at, *slash, *question;
        const char *p;

        uri = g_new0 (EUri, 1);

        /* find fragment */
        end = hash = strchr (uri_string, '#');
        if (hash && hash[1]) {
                uri->fragment = g_strdup (hash + 1);
                uri_decode (uri->fragment);
        }
        else
                end = uri_string + strlen (uri_string);

        /* find protocol: initial [a-z+.-]* substring until ":" */
        p = uri_string;
        while (p < end && (isalnum ((unsigned char) *p) ||
                           *p == '.' || *p == '+' || *p == '-'))
                p++;

        if (p > uri_string && *p == ':') {
                uri->protocol = g_strndup (uri_string, p - uri_string);
                g_strdown (uri->protocol);
                uri_string = p + 1;
        }
        else
                uri->protocol = g_strdup ("file");

        if (!*uri_string)
                return uri;

        /* check for authority */
        if (strncmp (uri_string, "//", 2) == 0) {
                uri_string += 2;

                slash = uri_string + strcspn (uri_string, "/#");
                at = strchr (uri_string, '@');
                if (at && at < slash) {
                        colon = strchr (uri_string, ':');
                        if (colon && colon < at) {
                                uri->passwd = g_strndup (colon + 1, at - colon - 1);
                                uri_decode (uri->passwd);
                        }
                        else {
                                uri->passwd = NULL;
                                colon = at;
                        }

                        semi = strchr (uri_string, ';');
                        if (semi && semi < colon &&
                            !strncasecmp (semi, ";auth=", 6)) {
                                uri->authmech = g_strndup (semi + 6, colon - semi - 6);
                                uri_decode (uri->authmech);
                        }
                        else {
                                uri->authmech = NULL;
                                semi = colon;
                        }

                        uri->user = g_strndup (uri_string, semi - uri_string);
                        uri_decode (uri->user);
                        uri_string = at + 1;
                }
                else
                        uri->user = uri->passwd = uri->authmech = NULL;

                /* find host and port */
                colon = strchr (uri_string, ':');
                if (colon && colon < slash) {
                        uri->host = g_strndup (uri_string, colon - uri_string);
                        uri->port = strtoul (colon + 1, NULL, 10);
                }
                else {
                        uri->host = g_strndup (uri_string, slash - uri_string);
                        uri_decode (uri->host);
                        uri->port = 0;
                }

                uri_string = slash;
        }

        /* find query */
        question = memchr (uri_string, '?', end - uri_string);
        if (question) {
                if (question[1]) {
                        uri->query = g_strndup (question + 1, end - (question + 1));
                        uri_decode (uri->query);
                }
                end = question;
        }

        /* find parameters */
        semi = memchr (uri_string, ';', end - uri_string);
        if (semi) {
                if (semi[1]) {
                        const char *cur, *p, *eq;
                        char *name, *value;

                        for (cur = semi + 1; cur < end; cur = p + 1) {
                                p = memchr (cur, ';', end - cur);
                                if (!p)
                                        p = end;
                                eq = memchr (cur, '=', p - cur);
                                if (eq) {
                                        name = g_strndup (cur, eq - cur);
                                        value = g_strndup (eq + 1, p - (eq + 1));
                                        uri_decode (value);
                                } else {
                                        name = g_strndup (cur, p - cur);
                                        value = g_strdup ("");
                                }
                                uri_decode (name);
                                g_datalist_set_data_full (&uri->params, name,
                                                          value, g_free);
                                g_free (name);
                        }
                }
                end = semi;
        }

        if (end != uri_string) {
                uri->path = g_strndup (uri_string, end - uri_string);
                uri_decode (uri->path);
        }

        return uri;
}

void
e_uri_free (EUri *uri)
{
        if (uri) {
                g_free (uri->protocol);
                g_free (uri->user);
                g_free (uri->authmech);
                g_free (uri->passwd);
                g_free (uri->host);
                g_free (uri->path);
                g_datalist_clear (&uri->params);
                g_free (uri->query);
                g_free (uri->fragment);

                g_free (uri);
        }
}

const char *
e_uri_get_param (EUri *uri, const char *name)
{
        return g_datalist_get_data (&uri->params, name);
}

static void
copy_param_cb (GQuark key_id, gpointer data, gpointer user_data)
{
        GData *params = (GData *) user_data;

        g_datalist_id_set_data_full (&params, key_id, g_strdup (data), g_free);
}

EUri *
e_uri_copy (EUri *uri)
{
        EUri *uri_copy;

        g_return_val_if_fail (uri != NULL, NULL);

        uri_copy = g_new0 (EUri, 1);
        uri_copy->protocol = g_strdup (uri->protocol);
        uri_copy->user = g_strdup (uri->user);
        uri_copy->authmech = g_strdup (uri->authmech);
        uri_copy->passwd = g_strdup (uri->passwd);
        uri_copy->host = g_strdup (uri->host);
        uri_copy->port = uri->port;
        uri_copy->path = g_strdup (uri->path);
        uri_copy->query = g_strdup (uri->query);
        uri_copy->fragment = g_strdup (uri->fragment);

        /* copy uri->params */
        g_datalist_foreach (&uri->params,
                            (GDataForeachFunc) copy_param_cb,
                            &uri_copy->params);

        return uri_copy;
}

char *
e_uri_to_string (EUri *uri, gboolean show_password)
{
        char *str_uri = NULL;

        g_return_val_if_fail (uri != NULL, NULL);

        if (uri->port != 0)
                str_uri = g_strdup_printf (
                        "%s://%s%s%s%s%s%s%s:%d%s%s%s",
                        uri->protocol,
                        uri->user ? uri->user : "",
                        uri->authmech ? ";auth=" : "",
                        uri->authmech ? uri->authmech : "",
                        uri->passwd && show_password ? ":" : "",
                        uri->passwd && show_password ? uri->passwd : "",
                        uri->user ? "@" : "",
                        uri->host ? uri->host : "",
                        uri->port,
                        uri->path ? uri->path : "",
                        uri->query ? "?" : "",
                        uri->query ? uri->query : "");
        else
                str_uri = g_strdup_printf(
                        "%s://%s%s%s%s%s%s%s%s%s%s",
                        uri->protocol,
                        uri->user ? uri->user : "",
                        uri->authmech ? ";auth=" : "",
                        uri->authmech ? uri->authmech : "",
                        uri->passwd && show_password ? ":" : "",
                        uri->passwd && show_password ? uri->passwd : "",
                        uri->user ? "@" : "",
                        uri->host ? uri->host : "",
                        uri->path ? uri->path : "",
                        uri->query ? "?" : "",
                        uri->query ? uri->query : "");

        return str_uri;
}