Add basic archive support using libarchive

All files I/O are currently done by archive_write_disk. However,
epiphany will get a segfault if the archive contains absolute path.
This may be able to be solved by using GIO for file I/O.

1 files changed, 99 insertions, 1 deletions

diff --git a/embed/ephy-download.c b/embed/ephy-download.c
index 60cbbb873..369e0ebff 100644
--- a/embed/ephy-download.c
+++ b/embed/ephy-download.c
@@ -648,6 +648,102 @@ ephy_download_do_download_action (EphyDownload *download,
 gboolean
 ephy_download_do_extract_archive (EphyDownload *download)
 {
+  gboolean failed;
+  struct archive *ar;
+  struct archive *ar_writer;
+  struct archive_entry *entry;
+  char *archive_filename;
+  char *output_dir;
+  int r;
+
+  failed = FALSE;
+
+  archive_filename = g_filename_from_uri (download->priv->destination, NULL, NULL);
+  if (archive_filename == NULL)
+    return FALSE;
+
+  output_dir = g_path_get_dirname (archive_filename);
+  if (*output_dir == '.') {
+    g_free (output_dir);
+    output_dir = ephy_file_get_downloads_dir ();
+  }
+
+  LOG ("ephy_download_do_extract_archive archive file: %s", archive_filename);
+  LOG ("ephy_download_do_extract_archive output dir: %s", output_dir);
+
+  ar = archive_read_new ();
+  archive_read_support_filter_all (ar);
+  archive_read_support_format_all (ar);
+
+  ar_writer = archive_write_disk_new ();
+  archive_write_disk_set_options (ar_writer,
+                                  ARCHIVE_EXTRACT_OWNER |
+                                  ARCHIVE_EXTRACT_PERM |
+                                  ARCHIVE_EXTRACT_TIME |
+                                  ARCHIVE_EXTRACT_NO_OVERWRITE |
+                                  ARCHIVE_EXTRACT_ACL |
+                                  ARCHIVE_EXTRACT_FFLAGS |
+                                  ARCHIVE_EXTRACT_XATTR |
+                                  ARCHIVE_EXTRACT_SPARSE);
+  archive_write_disk_set_standard_lookup (ar_writer);
+
+  if (archive_read_open_filename(ar, archive_filename, BUFFER_SIZE) != ARCHIVE_OK) {
+    LOG ("ephy_download_do_extract_archive cannot open then archive file");
+    archive_read_free (ar);
+    archive_write_free (ar_writer);
+    g_free (archive_filename);
+    return FALSE;
+  }
+
+  while(archive_read_next_header (ar, &entry) == ARCHIVE_OK) {
+    struct archive_entry *entry_writer;
+    char *extracted_filename;
+
+    extracted_filename = (char*)archive_entry_pathname (entry);
+    LOG ("ephy_download_do_extract_archive file name in archive: %s", extracted_filename);
+    entry_writer = archive_entry_clone (entry);
+
+    if(*extracted_filename != '/')
+      extracted_filename = g_build_path (G_DIR_SEPARATOR_S, output_dir, extracted_filename, NULL);
+
+    LOG ("ephy_download_do_extract_archive extracted file: %s", extracted_filename);
+    archive_entry_set_pathname (entry_writer, extracted_filename);
+
+    if ((r = archive_write_header (ar_writer, entry_writer)) != ARCHIVE_OK) {
+      LOG ("ephy_download_do_extract_archive header FAILED");
+      g_free (extracted_filename);
+      archive_entry_free (entry_writer);
+      continue;
+    }
+
+    LOG ("ephy_download_do_extract_archive header OK");
+
+    if (archive_entry_size (entry) > 0) {
+      size_t size;
+      off_t offset;
+      const void* buffer;
+      while ((r = archive_read_data_block (ar, &buffer, &size, &offset) == ARCHIVE_OK) &&
+                  archive_write_data (ar_writer, buffer, size) >= 0);
+      if (r != ARCHIVE_EOF)
+        failed = TRUE;
+    }
+
+    archive_write_finish_entry (ar_writer);
+    archive_entry_free (entry_writer);
+    g_free (extracted_filename);
+  }
+
+  archive_read_close (ar);
+  archive_read_free (ar);
+  archive_write_close (ar_writer);
+  archive_write_free (ar_writer);
+  g_free (archive_filename);
+  g_free (output_dir);
+
+  if (failed) {
+    return FALSE;
+  }
+
   return TRUE;
 }
 
@@ -912,7 +1008,9 @@ download_finished_cb (WebKitDownload *wk_download,
   g_signal_emit_by_name (download, "completed");
 
   if(g_settings_get_boolean (EPHY_SETTINGS_MAIN, EPHY_PREFS_EXTRACT_DOWNLOADED_ARCHIVES)){
-    ephy_download_do_extract_archive (download);
+    gboolean extract_ok;
+    extract_ok = ephy_download_do_extract_archive (download);
+    LOG ("download_finished_cb extract_ok: %hhd", extract_ok);
   }
 
   if (g_settings_get_boolean (EPHY_SETTINGS_MAIN, EPHY_PREFS_AUTO_DOWNLOADS) &&