imap: Added support for parsing URL query strings

Added support for parsing query strings from the URL as defined by
RFC-5092.

lib/imap.c

@@ -131,8 +131,7 @@ const struct Curl_handler Curl_handler_imap = {
   ZERO_NULL,                        /* readwrite */
   PORT_IMAP,                        /* defport */
   CURLPROTO_IMAP,                   /* protocol */
-  PROTOPT_CLOSEACTION | PROTOPT_NEEDSPWD
-  | PROTOPT_NOURLQUERY              /* flags */
+  PROTOPT_CLOSEACTION | PROTOPT_NEEDSPWD  /* flags */
 };
 
 #ifdef USE_SSL
@@ -157,8 +156,8 @@ const struct Curl_handler Curl_handler_imaps = {
   ZERO_NULL,                        /* readwrite */
   PORT_IMAPS,                       /* defport */
   CURLPROTO_IMAP | CURLPROTO_IMAPS, /* protocol */
-  PROTOPT_CLOSEACTION | PROTOPT_SSL | PROTOPT_NEEDSPWD
-  | PROTOPT_NOURLQUERY              /* flags */
+  PROTOPT_CLOSEACTION | PROTOPT_SSL |
+  PROTOPT_NEEDSPWD                  /* flags */
 };
 #endif
 
@@ -1902,6 +1901,7 @@ static CURLcode imap_done(struct connectdata *conn, CURLcode status,
   Curl_safefree(imap->uidvalidity);
   Curl_safefree(imap->uid);
   Curl_safefree(imap->section);
+  Curl_safefree(imap->query);
   Curl_safefree(imap->custom);
   Curl_safefree(imap->custom_params);
 
@@ -2476,6 +2476,21 @@ static CURLcode imap_parse_url_path(struct connectdata *conn)
     Curl_safefree(value);
   }
 
+  /* Does the URL contain a query parameter? Only valid when we have a mailbox
+     and no UID as per RFC-5092 */
+  if(imap->mailbox && !imap->uid && *ptr == '?') {
+    /* Find the length of the query parameter */
+    begin = ++ptr;
+    while(imap_is_bchar(*ptr))
+      ptr++;
+
+    /* Decode the query parameter */
+    result = Curl_urldecode(data, begin, ptr - begin, &imap->query, NULL,
+                            TRUE);
+    if(result)
+      return result;
+  }
+
   /* Any extra stuff at the end of the URL is an error */
   if(*ptr)
     return CURLE_URL_MALFORMAT;

lib/imap.h

@@ -68,6 +68,7 @@ struct IMAP {
   char *uidvalidity;      /* UIDVALIDITY to check in select */
   char *uid;              /* Message UID to fetch */
   char *section;          /* Message SECTION to fetch */
+  char *query;            /* Query to search for */
   char *custom;           /* Custom request */
   char *custom_params;    /* Parameters for the custom request */
 };