dirmngr: Extended the http_get_header function.

* dirmngr/http.c (send_request): Add arg 'skip'.  Adjust all callers.
--

GnuPG-bug-id: 6719

dirmngr/http.c

@@ -2845,18 +2845,27 @@ store_header (http_t hd, char *line)
 
 
 /* Return the header NAME from the last response.  The returned value
-   is valid as along as HD has not been closed and no other request
-   has been send. If the header was not found, NULL is returned.  NAME
-   must be canonicalized, that is the first letter of each dash
-   delimited part must be uppercase and all other letters lowercase.  */
+ * is valid as along as HD has not been closed and no other request
+ * has been send. If the header was not found, NULL is returned.  NAME
+ * must be canonicalized, that is the first letter of each dash
+ * delimited part must be uppercase and all other letters lowercase.
+ * SKIP gives the number of entries of the requested NAME to skip
+ * before returning; this can be used to enumerate headers with the
+ * same name (see store_header).
+*/
 const char *
-http_get_header (http_t hd, const char *name)
+http_get_header (http_t hd, const char *name, unsigned int skip)
 {
   header_t h;
 
   for (h=hd->headers; h; h = h->next)
-    if ( !strcmp (h->name, name) )
-      return h->value;
+    if (!strcmp (h->name, name))
+      {
+        if (skip)
+          skip--;
+        else
+          return h->value;
+      }
   return NULL;
 }
 
@@ -2979,7 +2988,7 @@ parse_response (http_t hd)
   cookie->content_length_valid = 0;
   if (!(hd->flags & HTTP_FLAG_IGNORE_CL))
     {
-      s = http_get_header (hd, "Content-Length");
+      s = http_get_header (hd, "Content-Length", 0);
       if (s)
         {
           cookie->content_length_valid = 1;

dirmngr/http.h

@@ -195,7 +195,7 @@ estream_t http_get_read_ptr (http_t hd);
 estream_t http_get_write_ptr (http_t hd);
 unsigned int http_get_status_code (http_t hd);
 const char *http_get_tls_info (http_t hd, const char *what);
-const char *http_get_header (http_t hd, const char *name);
+const char *http_get_header (http_t hd, const char *name, unsigned int skip);
 const char **http_get_header_names (http_t hd);
 gpg_error_t http_verify_server_credentials (http_session_t sess);
 

dirmngr/ks-engine-hkp.c

@@ -1327,7 +1327,7 @@ send_request (ctrl_t ctrl, const char *request, const char *hostportstr,
       {
         xfree (request_buffer);
         err = http_prepare_redirect (&redirinfo, http_get_status_code (http),
-                                     http_get_header (http, "Location"),
+                                     http_get_header (http, "Location", 0),
                                      &request_buffer);
         if (err)
           goto leave;

dirmngr/ks-engine-http.c

@@ -180,7 +180,7 @@ ks_http_fetch (ctrl_t ctrl, const char *url, unsigned int flags,
       {
         xfree (request_buffer);
         err = http_prepare_redirect (&redirinfo, http_get_status_code (http),
-                                     http_get_header (http, "Location"),
+                                     http_get_header (http, "Location", 0),
                                      &request_buffer);
         if (err)
           goto leave;

dirmngr/ocsp.c

@@ -227,7 +227,7 @@ do_ocsp_request (ctrl_t ctrl, ksba_ocsp_t ocsp,
             case 301:
             case 302:
               {
-                const char *s = http_get_header (http, "Location");
+                const char *s = http_get_header (http, "Location", 0);
 
                 log_info (_("URL '%s' redirected to '%s' (%u)\n"),
                           url, s?s:"[none]", http_get_status_code (http));

dirmngr/t-http.c

@@ -463,7 +463,7 @@ main (int argc, char **argv)
       log_fatal ("http_get_header_names failed: %s\n",
                  gpg_strerror (gpg_error_from_syserror ()));
     for (i = 0; names[i]; i++)
-      printf ("HDR: %s: %s\n", names[i], http_get_header (hd, names[i]));
+      printf ("HDR: %s: %s\n", names[i], http_get_header (hd, names[i], 0));
     xfree (names);
   }
   fflush (stdout);
@@ -489,7 +489,7 @@ main (int argc, char **argv)
     case 301:
     case 302:
     case 307:
-      log_info ("Redirected to: %s\n", http_get_header (hd, "Location"));
+      log_info ("Redirected to: %s\n", http_get_header (hd, "Location", 0));
       break;
     }
   http_close (hd, 0);