implement proper flow control for relaying postdata

[project/uhttpd.git] / file.c

diff --git a/file.c b/file.c
index 62c8ee7..e95a165 100644 (file)
--- a/file.c
+++ b/file.c
@@ -30,7 +30,6 @@
 #include "uhttpd.h"
 #include "mimetypes.h"
 
-static char _tag[128];
 static LIST_HEAD(index_files);
 static LIST_HEAD(dispatch_handlers);
 
@@ -234,8 +233,10 @@ uh_path_lookup(struct client *cl, const char *url)
                        continue;
 
                strcpy(pathptr, idx->name);
-               if (!stat(path_phys, &s) && (s.st_mode & S_IFREG))
+               if (!stat(path_phys, &s) && (s.st_mode & S_IFREG)) {
+                       memcpy(&p.stat, &s, sizeof(p.stat));
                        break;
+               }
 
                *pathptr = 0;
        }
@@ -247,10 +248,6 @@ uh_path_lookup(struct client *cl, const char *url)
        return p.phys ? &p : NULL;
 }
 
-#ifdef __APPLE__
-time_t timegm (struct tm *tm);
-#endif
-
 static const char * uh_file_mime_lookup(const char *path)
 {
        struct mimetype *m = &uh_mime_types[0];
@@ -272,14 +269,14 @@ static const char * uh_file_mime_lookup(const char *path)
        return "application/octet-stream";
 }
 
-static const char * uh_file_mktag(struct stat *s)
+static const char * uh_file_mktag(struct stat *s, char *buf)
 {
-       snprintf(_tag, sizeof(_tag), "\"%x-%x-%x\"",
+       snprintf(buf, sizeof(buf), "\"%x-%x-%x\"",
                         (unsigned int) s->st_ino,
                         (unsigned int) s->st_size,
                         (unsigned int) s->st_mtime);
 
-       return _tag;
+       return buf;
 }
 
 static time_t uh_file_date2unix(const char *date)
@@ -294,13 +291,13 @@ static time_t uh_file_date2unix(const char *date)
        return 0;
 }
 
-static char * uh_file_unix2date(time_t ts)
+static char * uh_file_unix2date(time_t ts, char *buf, int len)
 {
        struct tm *t = gmtime(&ts);
 
-       strftime(_tag, sizeof(_tag), "%a, %d %b %Y %H:%M:%S GMT", t);
+       strftime(buf, len, "%a, %d %b %Y %H:%M:%S GMT", t);
 
-       return _tag;
+       return buf;
 }
 
 static char *uh_file_header(struct client *cl, int idx)
@@ -313,12 +310,15 @@ static char *uh_file_header(struct client *cl, int idx)
 
 static void uh_file_response_ok_hdrs(struct client *cl, struct stat *s)
 {
+       char buf[128];
+
        if (s) {
-               ustream_printf(cl->us, "ETag: %s\r\n", uh_file_mktag(s));
+               ustream_printf(cl->us, "ETag: %s\r\n", uh_file_mktag(s, buf));
                ustream_printf(cl->us, "Last-Modified: %s\r\n",
-                              uh_file_unix2date(s->st_mtime));
+                              uh_file_unix2date(s->st_mtime, buf, sizeof(buf)));
        }
-       ustream_printf(cl->us, "Date: %s\r\n", uh_file_unix2date(time(NULL)));
+       ustream_printf(cl->us, "Date: %s\r\n",
+                      uh_file_unix2date(time(NULL), buf, sizeof(buf)));
 }
 
 static void uh_file_response_200(struct client *cl, struct stat *s)
@@ -341,7 +341,8 @@ static void uh_file_response_412(struct client *cl)
 
 static bool uh_file_if_match(struct client *cl, struct stat *s)
 {
-       const char *tag = uh_file_mktag(s);
+       char buf[128];
+       const char *tag = uh_file_mktag(s, buf);
        char *hdr = uh_file_header(cl, HDR_IF_MATCH);
        char *p;
        int i;
@@ -381,7 +382,8 @@ static int uh_file_if_modified_since(struct client *cl, struct stat *s)
 
 static int uh_file_if_none_match(struct client *cl, struct stat *s)
 {
-       const char *tag = uh_file_mktag(s);
+       char buf[128];
+       const char *tag = uh_file_mktag(s, buf);
        char *hdr = uh_file_header(cl, HDR_IF_NONE_MATCH);
        char *p;
        int i;
@@ -442,10 +444,11 @@ static void uh_file_dirlist(struct client *cl, struct path_info *pi)
 {
        int i;
        int count = 0;
-       char filename[PATH_MAX];
+       char *filename = uh_buf;
        char *pathptr;
        struct dirent **files = NULL;
        struct stat s;
+       char buf[128];
 
        uh_file_response_200(cl, NULL);
        ustream_printf(cl->us, "Content-Type: text/html\r\n\r\n");
@@ -458,14 +461,16 @@ static void uh_file_dirlist(struct client *cl, struct path_info *pi)
        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)];
+               int len;
+
+               strcpy(filename, pi->phys);
+               len = strlen(filename);
+               pathptr = filename + len;
+               len = PATH_MAX - len;
 
                /* list subdirs */
                for (i = 0; i < count; i++) {
-                       strncat(filename, files[i]->d_name,
-                                       sizeof(filename) - strlen(files[i]->d_name));
+                       snprintf(pathptr, len, "%s", files[i]->d_name);
 
                        if (!stat(filename, &s) &&
                                (s.st_mode & S_IFDIR) && (s.st_mode & S_IXOTH))
@@ -476,7 +481,7 @@ static void uh_file_dirlist(struct client *cl, struct path_info *pi)
                                        "<br /></small></li>",
                                        pi->name, files[i]->d_name,
                                        files[i]->d_name,
-                                       uh_file_unix2date(s.st_mtime),
+                                       uh_file_unix2date(s.st_mtime, buf, sizeof(buf)),
                                        s.st_size / 1024.0);
 
                        *pathptr = 0;
@@ -484,8 +489,7 @@ static void uh_file_dirlist(struct client *cl, struct path_info *pi)
 
                /* list files */
                for (i = 0; i < count; i++) {
-                       strncat(filename, files[i]->d_name,
-                                       sizeof(filename) - strlen(files[i]->d_name));
+                       snprintf(pathptr, len, "%s", files[i]->d_name);
 
                        if (!stat(filename, &s) &&
                                !(s.st_mode & S_IFDIR) && (s.st_mode & S_IROTH))
@@ -496,7 +500,7 @@ static void uh_file_dirlist(struct client *cl, struct path_info *pi)
                                        "<br /></small></li>",
                                        pi->name, files[i]->d_name,
                                        files[i]->d_name,
-                                       uh_file_unix2date(s.st_mtime),
+                                       uh_file_unix2date(s.st_mtime, buf, sizeof(buf)),
                                        uh_file_mime_lookup(filename),
                                        s.st_size / 1024.0);
 
@@ -681,7 +685,7 @@ static bool __handle_file_request(struct client *cl, const char *url)
 void uh_handle_request(struct client *cl)
 {
        struct dispatch_handler *d;
-       const char *url = cl->request.url;
+       const char *url = blobmsg_data(blob_data(cl->hdr.head));;
 
        d = dispatch_find(url, NULL);
        if (d) {
@@ -693,5 +697,5 @@ void uh_handle_request(struct client *cl)
            __handle_file_request(cl, conf.error_handler))
                return;
 
-       uh_client_error(cl, 404, "Not Found", "The requested URL %s was not found on this server.", cl->request.url);
+       uh_client_error(cl, 404, "Not Found", "The requested URL %s was not found on this server.", url);
 }