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mod_autoext.c

Special, 2007-07-06 23:08

 
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "base.h"
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#include "log.h"
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#include "buffer.h"
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#include "plugin.h"
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/*
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 * Copyright (c) 2007 John Brooks (special@inspircd.org)
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 *
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 * Permission is hereby granted, free of charge, to any person
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 * obtaining a copy of this software and associated documentation
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 * files (the "Software"), to deal in the Software without
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 * restriction, including without limitation the rights to use,
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 * copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following
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 * conditions:
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 * 
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 * The above copyright notice and this permission notice shall be
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 * included in all copies or substantial portions of the Software.
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 * 
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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 * OTHER DEALINGS IN THE SOFTWARE.
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 */
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/* plugin config for all request/connections */
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typedef struct {
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        array *suffixes;
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} plugin_config;
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typedef struct {
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        PLUGIN_DATA;
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        plugin_config **config_storage;
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        plugin_config conf;
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} plugin_data;
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/* init the plugin data */
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INIT_FUNC(mod_autoext_init)
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{
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        plugin_data *p;
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        p = calloc(1, sizeof(*p));
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        return p;
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}
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/* detroy the plugin data */
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FREE_FUNC(mod_autoext_free)
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{
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        plugin_data *p = p_d;
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        UNUSED(srv);
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        if (!p)
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                return HANDLER_GO_ON;
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        if (p->config_storage)
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        {
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                size_t i;
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                for (i = 0; i < srv->config_context->used; i++)
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                {
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                        plugin_config *s = p->config_storage[i];
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                        if (!s)
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                                continue;
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                        array_free(s->suffixes);
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                        free(s);
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                }
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                free(p->config_storage);
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        }
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        free(p);
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        return HANDLER_GO_ON;
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}
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/* handle plugin config and check values */
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SETDEFAULTS_FUNC(mod_autoext_set_defaults)
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{
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        plugin_data *p = p_d;
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        size_t i = 0;
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        config_values_t cv[] = {
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                { "autoext.suffixes",           NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },
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                { NULL,                         NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
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        };
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        if (!p)
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                return HANDLER_ERROR;
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        p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config*));
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        for (i = 0; i < srv->config_context->used; i++)
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        {
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                plugin_config *s;
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                s = calloc(1, sizeof(plugin_config));
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                s->suffixes    = array_init();
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                cv[0].destination = s->suffixes;
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                p->config_storage[i] = s;
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                if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv))
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                        return HANDLER_ERROR;
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        }
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        return HANDLER_GO_ON;
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}
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#define PATCH(x) p->conf.x = s->x;
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static int mod_autoext_patch_connection(server *srv, connection *con, plugin_data *p)
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{
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        size_t i, j;
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        plugin_config *s = p->config_storage[0];
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        PATCH(suffixes);
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        /* skip the first, the global context */
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        for (i = 1; i < srv->config_context->used; i++)
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        {
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                data_config *dc = (data_config *)srv->config_context->data[i];
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                s = p->config_storage[i];
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                /* condition didn't match */
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                if (!config_check_cond(srv, con, dc))
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                        continue;
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                /* merge config */
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                for (j = 0; j < dc->value->used; j++)
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                {
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                        data_unset *du = dc->value->data[j];
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                        if (buffer_is_equal_string(du->key, CONST_STR_LEN("autoext.suffixes")))
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                        {
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                                PATCH(suffixes);
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                        }
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                }
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        }
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        return 0;
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}
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#undef PATCH
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PHYSICALPATH_FUNC(mod_autoext_handle_physical)
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{
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        struct stat st;
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        size_t i, k;
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        plugin_data *p = (plugin_data *) p_d;
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        if (stat(con->physical.path->ptr, &st) == 0)
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                return HANDLER_GO_ON;
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        buffer_copy_string_buffer(srv->tmp_buf, con->physical.path);
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        mod_autoext_patch_connection(srv, con, p);
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        for (i = 1; i < srv->tmp_buf->used; i++)
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        {
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                if (srv->tmp_buf->ptr[i] != '/' && srv->tmp_buf->ptr[i] != '\0')
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                        continue;
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                srv->tmp_buf->ptr[i] = '\0';
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                if (stat(srv->tmp_buf->ptr, &st) != 0 && errno == ENOENT)
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                {
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                        // We have our file that doesn't exist! Now, find out which suffix, if any, this has
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                        buffer *apbuf = buffer_init();
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                        buffer_copy_string(apbuf, srv->tmp_buf->ptr);
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                        int apbaselen = apbuf->used;
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                        for (k = 0; k < p->conf.suffixes->used; k++)
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                        {
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                                apbuf->used = apbaselen;
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                                buffer_append_string(apbuf, ((data_string*) p->conf.suffixes->data[k])->value->ptr);
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                                if (stat(apbuf->ptr, &st) == 0)
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                                {
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                                        // Match!
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                                        buffer_append_string(apbuf, con->physical.path->ptr + i);
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                                        buffer_reset(con->physical.path);
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                                        buffer_copy_string(con->physical.path, apbuf->ptr);
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                                        return HANDLER_GO_ON;
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                                }
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                        }
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                        break;
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                }
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                srv->tmp_buf->ptr[i] = '/';
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        }
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        return HANDLER_GO_ON;
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}
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/* this function is called at dlopen() time and inits the callbacks */
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int mod_autoext_plugin_init(plugin *p) {
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        p->version     = LIGHTTPD_VERSION_ID;
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        p->name        = buffer_init_string("autoext");
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        p->init        = mod_autoext_init;
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        p->handle_physical = mod_autoext_handle_physical;
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        p->set_defaults  = mod_autoext_set_defaults;
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        p->cleanup     = mod_autoext_free;
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        p->data        = NULL;
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        return 0;
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}