loader improvements: add PackageLoader for pkg:// scheme

use pkgutil.get_data() instead of pkg_resources
template loading: load assets file through load() interface, use standard PackageLoader

pywb/urlrewrite/templateview.py

@@ -1,5 +1,7 @@
 from pywb.utils.timeutils import timestamp_to_datetime, timestamp_to_sec
 from pywb.utils.timeutils import timestamp_now
+from pywb.utils.loaders import load
+
 from six.moves.urllib.parse import urlsplit
 
 from jinja2 import Environment
@@ -15,13 +17,6 @@ import json
 import os
 
 
-# ============================================================================
-class FileOnlyPackageLoader(PackageLoader):
-    def get_source(self, env, template):
-        dir_, file_ = os.path.split(template)
-        return super(FileOnlyPackageLoader, self).get_source(env, file_)
-
-
 # ============================================================================
 class RelEnvironment(Environment):
     """Override join_path() to enable relative template paths."""
@@ -65,7 +60,7 @@ class JinjaEnv(object):
 
         # init assets
         if assets_path:
-            assets_loader = YAMLLoader(assets_path)
+            assets_loader = YAMLLoader(load(assets_path))
             assets_env = assets_loader.load_environment()
             assets_env.resolver = PkgResResolver()
             jinja_env.assets_environment = assets_env
@@ -78,7 +73,7 @@ class JinjaEnv(object):
 
         # add loaders for all specified packages
         for package in packages:
-            loaders.append(FileOnlyPackageLoader(package))
+            loaders.append(PackageLoader(package))
 
         return loaders
 

pywb/utils/loaders.py

@@ -12,7 +12,7 @@ from six.moves.urllib.request import pathname2url, url2pathname
 from six.moves.urllib.parse import urljoin, unquote_plus, urlsplit, urlencode
 
 import time
-import pkg_resources
+import pkgutil
 import base64
 import cgi
 
@@ -39,16 +39,20 @@ def to_file_url(filename):
     return url
 
 
+#=================================================================
+def load(filename):
+    return BlockLoader().load(filename)
+
+
 #=================================================================
 def load_yaml_config(config_file):
     import yaml
     config = None
     configdata = None
     try:
-        configdata = BlockLoader().load(config_file)
+        configdata = load(config_file)
         config = yaml.load(configdata)
     finally:
-        configdata.close()
         if configdata:
             configdata.close()
 
@@ -310,6 +314,7 @@ class BlockLoader(BaseLoader):
         BlockLoader.loaders['https'] = HttpLoader
         BlockLoader.loaders['s3'] = S3Loader
         BlockLoader.loaders['file'] = LocalFileLoader
+        BlockLoader.loaders['pkg'] = PackageLoader
 
     @staticmethod
     def set_profile_loader(src):
@@ -326,7 +331,33 @@ class BlockLoader(BaseLoader):
 
 
 #=================================================================
-class LocalFileLoader(BaseLoader):
+class PackageLoader(BaseLoader):
+    def load(self, url, offset=0, length=-1):
+        if url.startswith('pkg://'):
+            url = url[len('pkg://'):]
+
+        # then, try as package.path/file
+        pkg_split = url.split('/', 1)
+        if len(pkg_split) == 1:
+            raise
+
+        data = pkgutil.get_data(pkg_split[0], pkg_split[1])
+        if offset > 0:
+            data = data[offset:]
+
+        if length > -1:
+            data = data[:length]
+
+        buff = BytesIO(data)
+        buff.name = url
+        return buff
+
+        #afile = pkg_resources.resource_stream(pkg_split[0],
+        #                                      pkg_split[1])
+
+
+#=================================================================
+class LocalFileLoader(PackageLoader):
     def load(self, url, offset=0, length=-1):
         """
         Load a file-like reader from the local file system
@@ -348,13 +379,7 @@ class LocalFileLoader(BaseLoader):
             if file_only:
                 raise
 
-            # then, try as package.path/file
-            pkg_split = url.split('/', 1)
-            if len(pkg_split) == 1:
-                raise
-
-            afile = pkg_resources.resource_stream(pkg_split[0],
-                                                  pkg_split[1])
+            return super(LocalFileLoader, self).load(url, offset, length)
 
         if offset > 0:
             afile.seek(offset)

pywb/webagg/utils.py

@@ -9,6 +9,7 @@ from contextlib import closing
 
 from pywb.utils.timeutils import timestamp_to_http_date
 from pywb.utils.wbexception import BadRequestException
+from pywb.utils.loaders import load_yaml_config
 
 from six.moves.urllib.parse import quote
 from tempfile import SpooledTemporaryFile
@@ -223,22 +224,20 @@ def load_config(main_env_var, main_default_file='',
                 overlay_env_var='', overlay_file=''):
 
     configfile = os.environ.get(main_env_var, main_default_file)
+    config = None
 
     if configfile:
         configfile = os.path.expandvars(configfile)
-        # Load config
-        with open(configfile, 'rb') as fh:
-            config = yaml.load(fh)
 
-    else:
-        config = {}
+        config = load_yaml_config(configfile)
+
+    config = config or {}
 
     overlay_configfile = os.environ.get(overlay_env_var, overlay_file)
 
     if overlay_configfile:
         overlay_configfile = os.path.expandvars(overlay_configfile)
-        with open(overlay_configfile, 'rb') as fh:
-            config.update(yaml.load(fh))
+        config.update(load_yaml_config(overlay_configfile))
 
     return config