Do not trust file extensions when getting the command needed to uncompress

[evince.git] / libdocument / ev-file-helpers.c

diff --git a/libdocument/ev-file-helpers.c b/libdocument/ev-file-helpers.c
index 20c7bc4eabd1b8c66927ceafc401500b708a11de..34d24f0c4d17eb033dc6727a522e2d39acf68b08 100644 (file)
--- a/libdocument/ev-file-helpers.c
+++ b/libdocument/ev-file-helpers.c
@@ -62,15 +62,10 @@ ev_dot_dir (void)
        if (dot_dir == NULL) {
                gboolean exists;
 
-#if WITH_GNOME
-               dot_dir = g_build_filename (gnome_user_dir_get (),
-                                           "evince",
-                                           NULL);
-#else
-               dot_dir = g_build_filename (g_get_user_config_dir (),
+               dot_dir = g_build_filename (g_get_home_dir (),
+                                           ".gnome2",
                                            "evince",
                                            NULL);
-#endif
 
                exists = ensure_dir_exists (dot_dir);
                if (!exists)
@@ -214,7 +209,7 @@ ev_xfer_uri_simple (const char *from,
 {
        GFile *source_file;
        GFile *target_file;
-       GError *ioerror;
+       GError *ioerror = NULL;
        gboolean result;
        
        if (!from)
@@ -237,6 +232,66 @@ ev_xfer_uri_simple (const char *from,
 
 }
 
+static gchar *
+get_mime_type_from_uri (const gchar *uri, GError **error)
+{
+       GFile     *file;
+       GFileInfo *file_info;
+       gchar     *mime_type;
+
+       file = g_file_new_for_uri (uri);
+       file_info = g_file_query_info (file,
+                                      G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
+                                      0, NULL, error);
+       g_object_unref (file);
+
+       if (file_info == NULL)
+               return NULL;
+
+       mime_type = g_strdup (g_file_info_get_content_type (file_info));
+       g_object_unref (file_info);
+
+       return mime_type;
+}
+
+static gchar *
+get_mime_type_from_data (const gchar *uri, GError **error)
+{
+       GFile            *file;
+       GFileInputStream *input_stream;
+       gssize            size_read;
+       guchar            buffer[1024];
+
+       file = g_file_new_for_uri (uri);
+       
+       input_stream = g_file_read (file, NULL, error);
+       if (!input_stream) {
+               g_object_unref (file);
+               return NULL;
+       }
+
+       size_read = g_input_stream_read (G_INPUT_STREAM (input_stream),
+                                        buffer, 1024, NULL, NULL);
+       g_input_stream_close (G_INPUT_STREAM (input_stream), NULL, error);
+
+       g_object_unref (file);
+
+       if (size_read == -1)
+               return NULL;
+
+       return g_content_type_guess (NULL, /* no filename */
+                                    buffer, 1024,
+                                    NULL);
+}
+
+gchar *
+ev_file_get_mime_type (const gchar *uri,
+                      gboolean     fast,
+                      GError     **error)
+{
+       return fast ? get_mime_type_from_uri (uri, error) : get_mime_type_from_data (uri, error);
+}
+
 /* Compressed files support */
 #define BZIPCOMMAND "bzip2"
 #define GZIPCOMMAND "gzip"