src/net/http_metainfo.c

   1 /* libquvi
   2  * Copyright (C) 2012,2013  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This file is part of libquvi <http://quvi.sourceforge.net/>.
   5  *
   6  * This library is free software: you can redistribute it and/or
   7  * modify it under the terms of the GNU Affero General Public
   8  * License as published by the Free Software Foundation, either
   9  * version 3 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General
  17  * Public License along with this library.  If not, see
  18  * <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <glib/gi18n-lib.h>
  24 #include <glib.h>
  25 #include <lauxlib.h>
  26
  27 #include "quvi.h"
  28 /* -- */
  29 #include "_quvi_s.h"
  30 #include "_quvi_http_metainfo_s.h"
  31 #include "_quvi_net_s.h"
  32 #include "_quvi_macro.h"
  33 /* -- */
  34 #include "net/handle.h"
  35
  36 extern QuviError l_exec_util_to_file_ext(_quvi_t, const gchar*, GString*);
  37 extern QuviError c_http_metainfo(_quvi_t, _quvi_net_t);
  38
  39 static const gdouble MIN_LIKELY_MEDIA_LENGTH = 50*1024;
  40
  41 static QuviError _http_metainfo(_quvi_http_metainfo_t qmi)
  42 {
  43   _quvi_net_t n;
  44   QuviError rc;
  45   _quvi_t q;
  46
  47   q = qmi->handle.quvi;
  48   n = n_new(q, qmi->url.input->str);
  49
  50   if (q->cb.http_metainfo != NULL)
  51     rc = q->cb.http_metainfo(n);
  52   else
  53     rc = c_http_metainfo(q, n); /* Query using cURL (default). */
  54
  55   if (rc == QUVI_OK)
  56     {
  57       rc = l_exec_util_to_file_ext(q, n->http_metainfo.content_type->str,
  58                                    qmi->file_ext);
  59       if (rc == QUVI_OK)
  60         {
  61           g_string_assign(qmi->content_type, n->http_metainfo.content_type->str);
  62           qmi->length_bytes = n->http_metainfo.content_length;
  63         }
  64
  65       if (q->cb.status != NULL)
  66         {
  67           const glong p = q_makelong(QUVI_CALLBACK_STATUS_HTTP_QUERY_METAINFO,
  68                                      QUVI_CALLBACK_STATUS_DONE);
  69
  70           if (q->cb.status(p, 0, q->cb.userdata.status) != QUVI_OK)
  71             rc = QUVI_ERROR_CALLBACK_ABORTED;
  72         }
  73     }
  74   else
  75     {
  76       /* Save returned error message. */
  77       if (n->status.errmsg->len >0)
  78         g_string_assign(q->status.errmsg, n->status.errmsg->str);
  79       else
  80         {
  81           g_string_assign(q->status.errmsg,
  82                           "unknown error: http_metainfo: callback returned "
  83                           "an empty errmsg");
  84         }
  85     }
  86
  87   q->status.resp_code = n->status.resp_code;
  88   n_free(n);
  89
  90   return (rc);
  91 }
  92
  93 QuviError n_http_metainfo(_quvi_http_metainfo_t qmi)
  94 {
  95   _quvi_t q;
  96   gchar *s;
  97
  98   q = qmi->handle.quvi;
  99   s = g_uri_parse_scheme(qmi->url.input->str);
 100
 101   if (s != NULL) /* HTTP(S) only. */
 102     {
 103       const gboolean r = (gboolean) g_strcmp0(s, "http") == 0
 104                          || g_strcmp0(s, "https") == 0;
 105
 106       g_free(s);
 107       s = NULL;
 108
 109       if (r == FALSE)
 110         return (QUVI_OK); /* Skip process. */
 111     }
 112   else
 113     {
 114       g_string_printf(q->status.errmsg,
 115                       _("Failed to parse URL: %s"), qmi->url.input->str);
 116       return (QUVI_ERROR_INVALID_ARG); /* Skip process. */
 117     }
 118
 119   if (q->cb.status != NULL)
 120     {
 121       const glong p = q_makelong(QUVI_CALLBACK_STATUS_HTTP_QUERY_METAINFO, 0);
 122
 123       if (q->cb.status(p, 0, q->cb.userdata.status) != QUVI_OK)
 124         return (QUVI_ERROR_CALLBACK_ABORTED);
 125     }
 126
 127   return (_http_metainfo(qmi));
 128 }
 129
 130 /* vim: set ts=2 sw=2 tw=72 expandtab: */