You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
396 lines
8.7 KiB
C
396 lines
8.7 KiB
C
/*
|
|
* 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");
|
|
}
|
|
}
|
|
|