finished code to extract link rel tags

diff --git a/webcit/auth.c b/webcit/auth.c
index 620f9869e94b34e9ef6654b54894475d562a8e5b..1c0c87c9409483ff9f9f61e5d48a6bab0906d7b4 100644 (file)
--- a/webcit/auth.c
+++ b/webcit/auth.c
@@ -281,9 +281,66 @@ void extract_link(char *target_buf, int target_size, char *rel, char *source_buf
 {
        char *ptr = source_buf;
 
+       if (!target_buf) return;
+       if (!rel) return;
+       if (!source_buf) return;
+
+       target_buf[0] = 0;
+
        while (ptr = bmstrcasestr(ptr, "<link"), ptr != NULL) {
 
-       lprintf(9, "Got something\n", ptr);             // FIXME
+               char work_buffer[1024];
+               char *link_tag_start = NULL;
+               char *link_tag_end = NULL;
+
+               char rel_tag[1024];
+               char href_tag[1024];
+
+               link_tag_start = ptr;
+               link_tag_end = strchr(ptr, '>');
+               rel_tag[0] = 0;
+               href_tag[0] = 0;
+
+               if ((link_tag_end) && (link_tag_end > link_tag_start)) {
+                       int len;
+                       len = link_tag_end - link_tag_start;
+                       if (len > sizeof work_buffer) len = sizeof work_buffer;
+                       memcpy(work_buffer, link_tag_start, len);
+               
+                       char *rel_start = NULL;
+                       char *rel_end = NULL;
+                       rel_start = bmstrcasestr(work_buffer, "rel=");
+                       if (rel_start) {
+                               rel_start = strchr(rel_start, '\"');
+                               if (rel_start) {
+                                       ++rel_start;
+                                       rel_end = strchr(rel_start, '\"');
+                                       if ((rel_end) && (rel_end > rel_start)) {
+                                               safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1);
+                                       }
+                               }
+                       }
+
+                       char *href_start = NULL;
+                       char *href_end = NULL;
+                       href_start = bmstrcasestr(work_buffer, "href=");
+                       if (href_start) {
+                               href_start = strchr(href_start, '\"');
+                               if (href_start) {
+                                       ++href_start;
+                                       href_end = strchr(href_start, '\"');
+                                       if ((href_end) && (href_end > href_start)) {
+                                               safestrncpy(href_tag, href_start, href_end - href_start + 1);
+                                       }
+                               }
+                       }
+
+                       if (!strcasecmp(rel, rel_tag)) {
+                               safestrncpy(target_buf, href_tag, target_size);
+                               return;
+                       }
+
+               }
 
        ++ptr;
        }