--- /dev/null
+#define _XOPEN_SOURCE 500 /* strptime() ... */
+#define _BSD_SOURCE /* scandir() ... */
+
+#include "uhttpd.h"
+#include "uhttpd-file.h"
+#include "uhttpd-utils.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 mktime(&t);
+
+ return 0;
+}
+
+static char * uh_file_unix2date(time_t ts)
+{
+ static char str[128];
+ struct tm *t = localtime(&ts);
+
+ strftime(str, sizeof(str), "%a, %d %b %Y %H:%M:%S %Z", 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)
+{
+ 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",
+ 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 uh_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)
+{
+ int fd, rlen;
+ char buf[UH_LIMIT_MSGHEAD];
+ struct uh_path_info *pi;
+
+ /* obtain path information */
+ if( (pi = uh_path_lookup(cl, req->url)) != NULL )
+ {
+ /* 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 )
+ uh_http_send(cl, NULL, "Transfer-Encoding: chunked\r\n", -1);
+
+ /* close header */
+ uh_http_send(cl, NULL, "\r\n", -1);
+
+ /* pump file data */
+ while( (rlen = read(fd, buf, sizeof(buf))) > 0 )
+ {
+ uh_http_send(cl, req, buf, rlen);
+ }
+
+ /* 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");
+ }
+ }
+
+ /* 404 */
+ else
+ {
+ uh_http_sendhf(cl, 404, "Not Found",
+ "No such file or directory");
+ }
+}
+
projects / project / luci.git / blobdiff