commit 0f8ade8

Propagate 'last-modified' and 'etag' fields while proxying.

But does it work?

 1@@ -2796,7 +2796,8 @@ xs_str *html_notifications(snac *user, int skip, int show)
 2 
 3 
 4 int html_get_handler(const xs_dict *req, const char *q_path,
 5-                     char **body, int *b_size, char **ctype, xs_str **etag)
 6+                     char **body, int *b_size, char **ctype,
 7+                     xs_str **etag, xs_str **last_modified)
 8 {
 9     const char *accept = xs_dict_get(req, "accept");
10     int status = HTTP_STATUS_NOT_FOUND;
11@@ -3227,6 +3228,11 @@ int html_get_handler(const xs_dict *req, const char *q_path,
12 
13             if (valid_status(status)) {
14                 const char *ct = xs_dict_get(rsp, "content-type");
15+                const char *lm = xs_dict_get(rsp, "last-modified");
16+                const char *et = xs_dict_get(rsp, "etag");
17+
18+                if (lm) *last_modified = xs_dup(lm);
19+                if (et) *etag = xs_dup(et);
20 
21                 /* find the content-type in the static mime types,
22                    and return that value instead of ct, which will

 1@@ -278,6 +278,7 @@ void httpd_connection(FILE *f)
 2     xs *q_path   = NULL;
 3     xs *payload  = NULL;
 4     xs *etag     = NULL;
 5+    xs *last_modified = NULL;
 6     int p_size   = 0;
 7     const char *p;
 8     int fcgi_id;
 9@@ -329,7 +330,7 @@ void httpd_connection(FILE *f)
10 #endif /* NO_MASTODON_API */
11 
12         if (status == 0)
13-            status = html_get_handler(req, q_path, &body, &b_size, &ctype, &etag);
14+            status = html_get_handler(req, q_path, &body, &b_size, &ctype, &etag, &last_modified);
15     }
16     else
17     if (strcmp(method, "POST") == 0) {
18@@ -423,6 +424,8 @@ void httpd_connection(FILE *f)
19 
20     if (!xs_is_null(etag))
21         headers = xs_dict_append(headers, "etag", etag);
22+    if (!xs_is_null(last_modified))
23+        headers = xs_dict_append(headers, "last-modified", last_modified);
24 
25     /* if there are any additional headers, add them */
26     const xs_dict *more_headers = xs_dict_get(srv_config, "http_headers");

 1@@ -349,7 +349,9 @@ xs_str *html_timeline(snac *user, const xs_list *list, int read_only,
 2                       const char *title, const char *page, int utl, const char *error);
 3 
 4 int html_get_handler(const xs_dict *req, const char *q_path,
 5-                     char **body, int *b_size, char **ctype, xs_str **etag);
 6+                     char **body, int *b_size, char **ctype,
 7+                     xs_str **etag, xs_str **last_modified);
 8+
 9 int html_post_handler(const xs_dict *req, const char *q_path,
10                       char *payload, int p_size,
11                       char **body, int *b_size, char **ctype);