From c1fcf109b0f005bf91ae1773b061d94f77212665 Mon Sep 17 00:00:00 2001
From: Fufu Fang <fangfufu2003@gmail.com>
Date: Tue, 24 Jul 2018 06:44:41 +0100
Subject: [PATCH] added timestamp support

---
 main.c    |  5 +++--
 network.c | 55 +++++++++++++++++++++++++++++++------------------------
 network.h |  1 +
 3 files changed, 35 insertions(+), 26 deletions(-)

diff --git a/main.c b/main.c
index dd7b501..4a9bf76 100644
--- a/main.c
+++ b/main.c
@@ -74,6 +74,9 @@ static int fs_getattr(const char *path, struct stat *stbuf)
         if (!link) {
             return -ENOENT;
         }
+        struct timespec spec;
+        spec.tv_sec = link->time;
+        stbuf->st_mtim = spec;
         switch (link->type) {
             case LINK_DIR:
                 stbuf->st_mode = S_IFDIR | 0755;
@@ -88,8 +91,6 @@ static int fs_getattr(const char *path, struct stat *stbuf)
                 return -ENOENT;
         }
     }
-
-
     return res;
 }
 
diff --git a/network.c b/network.c
index 23fe291..a622f59 100644
--- a/network.c
+++ b/network.c
@@ -18,7 +18,7 @@ typedef struct {
 } MemoryStruct;
 
 typedef enum {
-    FILESIZE = 's',
+    FILESTAT = 's',
     DATA = 'd'
 } TransferType;
 
@@ -43,11 +43,12 @@ static CURLM *curl_multi;
 
 /* Link related */
 static Link *Link_new(const char *p_url, LinkType type);
-static void Link_get_size(Link *this_link);
+static void Link_get_stat(Link *this_link);
 static Link *path_to_Link_recursive(char *path, LinkTable *linktbl);
 static CURL *Link_to_curl(Link *link);
 static LinkType p_url_type(const char *p_url);
 static char *url_append(const char *url, const char *sublink);
+static void link_set_stat(Link* this_link, CURL *curl);
 
 /* LinkTable related */
 static void LinkTable_add(LinkTable *linktbl, Link *link);
@@ -170,29 +171,13 @@ static int curl_multi_perform_once()
                         url);
             } else {
                 /* Transfer successful, query the file size */
-                if (transfer->type == FILESIZE) {
-                    Link *this_link = transfer->link;
-                    long http_resp;
-                    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_resp);
-                    if (http_resp == HTTP_OK) {
-                        double cl = 0;
-                        curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
-                        if (cl == -1) {
-                            /* Turns out not to be a file after all */
-                            this_link->content_length = 0;
-                            this_link->type = LINK_DIR;
-                        } else {
-                            this_link->content_length = cl;
-                            this_link->type = LINK_FILE;
-                        }
-                    } else {
-                        this_link->type = LINK_INVALID;
-                    }
+                if (transfer->type == FILESTAT) {
+                    link_set_stat(transfer->link, curl);
                 }
             }
             curl_multi_remove_handle(curl_multi, curl);
             /* clean up the handle, if we are querying the file size */
-            if (transfer->type == FILESIZE) {
+            if (transfer->type == FILESTAT) {
                 curl_easy_cleanup(curl);
                 free(transfer);
             }
@@ -467,7 +452,28 @@ static void LinkTable_add(LinkTable *linktbl, Link *link)
     linktbl->links[linktbl->num - 1] = link;
 }
 
-void Link_get_size(Link *this_link)
+static void link_set_stat(Link* this_link, CURL *curl)
+{
+    long http_resp;
+    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_resp);
+    if (http_resp == HTTP_OK) {
+        double cl = 0;
+        curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
+        curl_easy_getinfo(curl, CURLINFO_FILETIME, &(this_link->time));
+        if (cl == -1) {
+            /* Turns out not to be a file after all */
+            this_link->content_length = 0;
+            this_link->type = LINK_DIR;
+        } else {
+            this_link->content_length = cl;
+            this_link->type = LINK_FILE;
+        }
+    } else {
+        this_link->type = LINK_INVALID;
+    }
+}
+
+void Link_get_stat(Link *this_link)
 {
 #ifdef HTTPDIRFS_INFO
     fprintf(stderr, "Link_get_size(%s);\n", this_link->f_url);
@@ -476,13 +482,14 @@ void Link_get_size(Link *this_link)
     if (this_link->type == LINK_FILE) {
         CURL *curl = Link_to_curl(this_link);
         curl_easy_setopt(curl, CURLOPT_NOBODY, 1);
+        curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
 
         TransferStruct *transfer = malloc(sizeof(TransferStruct));
         if (!transfer) {
             fprintf(stderr, "Link_get_size(): malloc failed!\n");
         }
         transfer->link = this_link;
-        transfer->type = FILESIZE;
+        transfer->type = FILESTAT;
         curl_easy_setopt(curl, CURLOPT_PRIVATE, transfer);
 
         nonblocking_transfer(curl);
@@ -500,7 +507,7 @@ void LinkTable_fill(LinkTable *linktbl)
             strncpy(this_link->f_url, url, URL_LEN_MAX);
             free(url);
             if (this_link->type == LINK_FILE && !(this_link->content_length)) {
-                Link_get_size(this_link);
+                Link_get_stat(this_link);
             }
         }
     }
diff --git a/network.h b/network.h
index 9290f53..d1dfc0d 100644
--- a/network.h
+++ b/network.h
@@ -35,6 +35,7 @@ struct Link {
     LinkType type;
     size_t content_length;
     LinkTable *next_table;
+    long time;
 };
 
 struct LinkTable {