From 56d71638dbf48b8e4885e1e5ed5d0f1859674541 Mon Sep 17 00:00:00 2001 From: jow Date: Thu, 25 Mar 2010 15:46:16 +0000 Subject: [package] add uhttpd (moved from LuCI trunk) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20428 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- package/uhttpd/src/uhttpd-file.c | 395 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 395 insertions(+) create mode 100644 package/uhttpd/src/uhttpd-file.c (limited to 'package/uhttpd/src/uhttpd-file.c') diff --git a/package/uhttpd/src/uhttpd-file.c b/package/uhttpd/src/uhttpd-file.c new file mode 100644 index 000000000..2a06f8520 --- /dev/null +++ b/package/uhttpd/src/uhttpd-file.c @@ -0,0 +1,395 @@ +/* + * uhttpd - Tiny single-threaded httpd - Static file handler + * + * Copyright (C) 2010 Jo-Philipp Wich + * + * 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, + "Index of %s" + "

Index of %s

    ", + 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, + "
  1. %s/
    " + "modified: %s
    directory - %.02f kbyte" + "

    2. ", + 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, + "
  2. %s
    " + "modified: %s
    %s - %.02f kbyte
    " + "
    3. ", + 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, "
"); + 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"); + } +} + -- cgit v1.2.3