+++ /dev/null
-/*
- * uhttpd - Tiny single-threaded httpd - Static file handler
- *
- * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define _XOPEN_SOURCE 500 /* strptime() */
-#define _BSD_SOURCE /* scandir(), timegm() */
-
-#include "uhttpd.h"
-#include "uhttpd-utils.h"
-#include "uhttpd-file.h"
-
-#include "uhttpd-mimetypes.h"
-
-
-static const char * uh_file_mime_lookup(const char *path)
-{
- struct mimetype *m = &uh_mime_types[0];
- char *p, *pd, *ps;
-
- ps = strrchr(path, '/');
- pd = strrchr(path, '.');
-
- /* use either slash or dot as separator, whatever comes last */
- p = (ps && pd && (ps > pd)) ? ps : pd;
-
- if( (p != NULL) && (*(++p) != 0) )
- {
- while( m->extn )
- {
- if( ! strcasecmp(p, m->extn) )
- return m->mime;
-
- m++;
- }
- }
-
- return "application/octet-stream";
-}
-
-static const char * uh_file_mktag(struct stat *s)
-{
- static char tag[128];
-
- snprintf(tag, sizeof(tag), "\"%x-%x-%x\"",
- (unsigned int) s->st_ino,
- (unsigned int) s->st_size,
- (unsigned int) s->st_mtime
- );
-
- return tag;
-}
-
-static time_t uh_file_date2unix(const char *date)
-{
- struct tm t;
-
- memset(&t, 0, sizeof(t));
-
- if( strptime(date, "%a, %d %b %Y %H:%M:%S %Z", &t) != NULL )
- return timegm(&t);
-
- return 0;
-}
-
-static char * uh_file_unix2date(time_t ts)
-{
- static char str[128];
- struct tm *t = gmtime(&ts);
-
- strftime(str, sizeof(str), "%a, %d %b %Y %H:%M:%S GMT", t);
-
- return str;
-}
-
-static char * uh_file_header_lookup(struct http_request *req, const char *name)
-{
- int i;
-
- foreach_header(i, req->headers)
- {
- if( ! strcasecmp(req->headers[i], name) )
- return req->headers[i+1];
- }
-
- return NULL;
-}
-
-static void uh_file_response_ok_hdrs(struct client *cl, struct http_request *req, struct stat *s)
-{
- uh_http_sendf(cl, NULL, "Connection: close\r\n");
-
- if( s )
- {
- uh_http_sendf(cl, NULL, "ETag: %s\r\n", uh_file_mktag(s));
- uh_http_sendf(cl, NULL, "Last-Modified: %s\r\n", uh_file_unix2date(s->st_mtime));
- }
-
- uh_http_sendf(cl, NULL, "Date: %s\r\n", uh_file_unix2date(time(NULL)));
-}
-
-static void uh_file_response_200(struct client *cl, struct http_request *req, struct stat *s)
-{
- uh_http_sendf(cl, NULL, "HTTP/%.1f 200 OK\r\n", req->version);
- uh_file_response_ok_hdrs(cl, req, s);
-}
-
-static void uh_file_response_304(struct client *cl, struct http_request *req, struct stat *s)
-{
- uh_http_sendf(cl, NULL, "HTTP/%.1f 304 Not Modified\r\n", req->version);
- uh_file_response_ok_hdrs(cl, req, s);
-}
-
-static void uh_file_response_412(struct client *cl, struct http_request *req)
-{
- uh_http_sendf(cl, NULL,
- "HTTP/%.1f 412 Precondition Failed\r\n"
- "Connection: close\r\n", req->version);
-}
-
-static int uh_file_if_match(struct client *cl, struct http_request *req, struct stat *s)
-{
- const char *tag = uh_file_mktag(s);
- char *hdr = uh_file_header_lookup(req, "If-Match");
- char *p;
- int i;
-
- if( hdr )
- {
- p = &hdr[0];
-
- for( i = 0; i < strlen(hdr); i++ )
- {
- if( (hdr[i] == ' ') || (hdr[i] == ',') )
- {
- hdr[i++] = 0;
- p = &hdr[i];
- }
- else if( !strcmp(p, "*") || !strcmp(p, tag) )
- {
- return 1;
- }
- }
-
- uh_file_response_412(cl, req);
- return 0;
- }
-
- return 1;
-}
-
-static int uh_file_if_modified_since(struct client *cl, struct http_request *req, struct stat *s)
-{
- char *hdr = uh_file_header_lookup(req, "If-Modified-Since");
-
- if( hdr )
- {
- if( uh_file_date2unix(hdr) < s->st_mtime )
- {
- return 1;
- }
- else
- {
- uh_file_response_304(cl, req, s);
- return 0;
- }
- }
-
- return 1;
-}
-
-static int uh_file_if_none_match(struct client *cl, struct http_request *req, struct stat *s)
-{
- const char *tag = uh_file_mktag(s);
- char *hdr = uh_file_header_lookup(req, "If-None-Match");
- char *p;
- int i;
-
- if( hdr )
- {
- p = &hdr[0];
-
- for( i = 0; i < strlen(hdr); i++ )
- {
- if( (hdr[i] == ' ') || (hdr[i] == ',') )
- {
- hdr[i++] = 0;
- p = &hdr[i];
- }
- else if( !strcmp(p, "*") || !strcmp(p, tag) )
- {
- if( (req->method == UH_HTTP_MSG_GET) ||
- (req->method == UH_HTTP_MSG_HEAD) )
- uh_file_response_304(cl, req, s);
- else
- uh_file_response_412(cl, req);
-
- return 0;
- }
- }
- }
-
- return 1;
-}
-
-static int uh_file_if_range(struct client *cl, struct http_request *req, struct stat *s)
-{
- char *hdr = uh_file_header_lookup(req, "If-Range");
-
- if( hdr )
- {
- uh_file_response_412(cl, req);
- return 0;
- }
-
- return 1;
-}
-
-static int uh_file_if_unmodified_since(struct client *cl, struct http_request *req, struct stat *s)
-{
- char *hdr = uh_file_header_lookup(req, "If-Unmodified-Since");
-
- if( hdr )
- {
- if( uh_file_date2unix(hdr) <= s->st_mtime )
- {
- uh_file_response_412(cl, req);
- return 0;
- }
- }
-
- return 1;
-}
-
-
-static int uh_file_scandir_filter_dir(const struct dirent *e)
-{
- return strcmp(e->d_name, ".") ? 1 : 0;
-}
-
-static void uh_file_dirlist(struct client *cl, struct http_request *req, struct path_info *pi)
-{
- int i, count;
- char filename[PATH_MAX];
- char *pathptr;
- struct dirent **files = NULL;
- struct stat s;
-
- uh_http_sendf(cl, req,
- "<html><head><title>Index of %s</title></head>"
- "<body><h1>Index of %s</h1><hr /><ol>",
- pi->name, pi->name
- );
-
- if( (count = scandir(pi->phys, &files, uh_file_scandir_filter_dir, alphasort)) > 0 )
- {
- memset(filename, 0, sizeof(filename));
- memcpy(filename, pi->phys, sizeof(filename));
- pathptr = &filename[strlen(filename)];
-
- /* list subdirs */
- for( i = 0; i < count; i++ )
- {
- strncat(filename, files[i]->d_name,
- sizeof(filename) - strlen(files[i]->d_name));
-
- if( !stat(filename, &s) && (s.st_mode & S_IFDIR) )
- uh_http_sendf(cl, req,
- "<li><strong><a href='%s%s'>%s</a>/</strong><br />"
- "<small>modified: %s<br />directory - %.02f kbyte"
- "<br /><br /></small></li>",
- pi->name, files[i]->d_name, files[i]->d_name,
- uh_file_unix2date(s.st_mtime), s.st_size / 1024.0
- );
-
- *pathptr = 0;
- }
-
- /* list files */
- for( i = 0; i < count; i++ )
- {
- strncat(filename, files[i]->d_name,
- sizeof(filename) - strlen(files[i]->d_name));
-
- if( !stat(filename, &s) && !(s.st_mode & S_IFDIR) )
- uh_http_sendf(cl, req,
- "<li><strong><a href='%s%s'>%s</a></strong><br />"
- "<small>modified: %s<br />%s - %.02f kbyte<br />"
- "<br /></small></li>",
- pi->name, files[i]->d_name, files[i]->d_name,
- uh_file_unix2date(s.st_mtime),
- uh_file_mime_lookup(filename), s.st_size / 1024.0
- );
-
- *pathptr = 0;
- free(files[i]);
- }
- }
-
- free(files);
-
- uh_http_sendf(cl, req, "</ol><hr /></body></html>");
- uh_http_sendf(cl, req, "");
-}
-
-
-void uh_file_request(struct client *cl, struct http_request *req, struct path_info *pi)
-{
- int fd, rlen;
- char buf[UH_LIMIT_MSGHEAD];
-
- /* we have a file */
- if( (pi->stat.st_mode & S_IFREG) && ((fd = open(pi->phys, O_RDONLY)) > 0) )
- {
- /* test preconditions */
- if(
- uh_file_if_modified_since(cl, req, &pi->stat) &&
- uh_file_if_match(cl, req, &pi->stat) &&
- uh_file_if_range(cl, req, &pi->stat) &&
- uh_file_if_unmodified_since(cl, req, &pi->stat) &&
- uh_file_if_none_match(cl, req, &pi->stat)
- ) {
- /* write status */
- uh_file_response_200(cl, req, &pi->stat);
-
- uh_http_sendf(cl, NULL, "Content-Type: %s\r\n", uh_file_mime_lookup(pi->name));
- uh_http_sendf(cl, NULL, "Content-Length: %i\r\n", pi->stat.st_size);
-
- /* if request was HTTP 1.1 we'll respond chunked */
- if( (req->version > 1.0) && (req->method != UH_HTTP_MSG_HEAD) )
- uh_http_send(cl, NULL, "Transfer-Encoding: chunked\r\n", -1);
-
- /* close header */
- uh_http_send(cl, NULL, "\r\n", -1);
-
- /* send body */
- if( req->method != UH_HTTP_MSG_HEAD )
- {
- /* pump file data */
- while( (rlen = read(fd, buf, sizeof(buf))) > 0 )
- {
- if( uh_http_send(cl, req, buf, rlen) < 0 )
- break;
- }
-
- /* send trailer in chunked mode */
- uh_http_send(cl, req, "", 0);
- }
- }
-
- /* one of the preconditions failed, terminate opened header and exit */
- else
- {
- uh_http_send(cl, NULL, "\r\n", -1);
- }
-
- close(fd);
- }
-
- /* directory */
- else if( pi->stat.st_mode & S_IFDIR )
- {
- /* write status */
- uh_file_response_200(cl, req, NULL);
-
- if( req->version > 1.0 )
- uh_http_send(cl, NULL, "Transfer-Encoding: chunked\r\n", -1);
-
- uh_http_send(cl, NULL, "Content-Type: text/html\r\n\r\n", -1);
-
- /* content */
- uh_file_dirlist(cl, req, pi);
- }
-
- /* 403 */
- else
- {
- uh_http_sendhf(cl, 403, "Forbidden",
- "Access to this resource is forbidden");
- }
-}
-
projects / project / luci.git / blobdiff