115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* uhttpd - Tiny single-threaded httpd
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*
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* Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
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* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#define _GNU_SOURCE
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#include <libubox/blobmsg.h>
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#include "uhttpd.h"
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static LIST_HEAD(interpreters);
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void uh_interpreter_add(const char *ext, const char *path)
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{
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struct interpreter *in;
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char *new_ext, *new_path;
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in = calloc_a(sizeof(*in),
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&new_ext, strlen(ext) + 1,
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&new_path, strlen(path) + 1);
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in->ext = strcpy(new_ext, ext);
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in->path = strcpy(new_path, path);
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list_add_tail(&in->list, &interpreters);
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}
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static void cgi_main(struct client *cl, struct path_info *pi, char *url)
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{
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const struct interpreter *ip = pi->ip;
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struct env_var *var;
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clearenv();
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setenv("PATH", conf.cgi_path, 1);
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for (var = uh_get_process_vars(cl, pi); var->name; var++) {
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if (!var->value)
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continue;
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setenv(var->name, var->value, 1);
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}
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if (!chdir(pi->root)) {
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if (ip)
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execl(ip->path, ip->path, pi->phys, NULL);
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else
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execl(pi->phys, pi->phys, NULL);
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}
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printf("Status: 500 Internal Server Error\r\n\r\n"
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"Unable to launch the requested CGI program:\n"
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" %s: %s\n", ip ? ip->path : pi->phys, strerror(errno));
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}
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static void cgi_handle_request(struct client *cl, char *url, struct path_info *pi)
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{
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unsigned int mode = S_IFREG | S_IXOTH;
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if (!pi->ip && !((pi->stat.st_mode & mode) == mode)) {
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uh_client_error(cl, 403, "Forbidden",
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"You don't have permission to access %s on this server.",
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url);
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return;
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}
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if (!uh_create_process(cl, pi, url, cgi_main)) {
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uh_client_error(cl, 500, "Internal Server Error",
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"Failed to create CGI process: %s", strerror(errno));
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return;
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}
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return;
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}
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static bool check_cgi_path(struct path_info *pi, const char *url)
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{
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struct interpreter *ip;
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const char *path = pi->phys;
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int path_len = strlen(path);
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list_for_each_entry(ip, &interpreters, list) {
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int len = strlen(ip->ext);
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if (len >= path_len)
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continue;
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if (strcmp(path + path_len - len, ip->ext) != 0)
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continue;
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pi->ip = ip;
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return true;
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}
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pi->ip = NULL;
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return uh_path_match(conf.cgi_docroot_path, pi->phys);
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}
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struct dispatch_handler cgi_dispatch = {
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.script = true,
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.check_path = check_cgi_path,
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.handle_request = cgi_handle_request,
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};
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