1 files changed, 156 insertions, 0 deletions
diff --git a/webapp/django/core/files/uploadedfile.py b/webapp/django/core/files/uploadedfile.py
new file mode 100644
index 0000000000..afbcdba0f0
--- /dev/null
+++ b/webapp/django/core/files/uploadedfile.py
@@ -0,0 +1,156 @@
+"""
+Classes representing uploaded files.
+"""
+
+import os
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from StringIO import StringIO
+
+from django.conf import settings
+from django.core.files.base import File
+from django.core.files import temp as tempfile
+
+__all__ = ('UploadedFile', 'TemporaryUploadedFile', 'InMemoryUploadedFile',
+           'SimpleUploadedFile')
+
+class UploadedFile(File):
+    """
+    A abstract uploaded file (``TemporaryUploadedFile`` and
+    ``InMemoryUploadedFile`` are the built-in concrete subclasses).
+
+    An ``UploadedFile`` object behaves somewhat like a file object and
+    represents some file data that the user submitted with a form.
+    """
+    DEFAULT_CHUNK_SIZE = 64 * 2**10
+
+    def __init__(self, name=None, content_type=None, size=None, charset=None):
+        self.name = name
+        self.size = size
+        self.content_type = content_type
+        self.charset = charset
+
+    def __repr__(self):
+        return "<%s: %s (%s)>" % (self.__class__.__name__, self.name, self.content_type)
+
+    def _get_name(self):
+        return self._name
+
+    def _set_name(self, name):
+        # Sanitize the file name so that it can't be dangerous.
+        if name is not None:
+            # Just use the basename of the file -- anything else is dangerous.
+            name = os.path.basename(name)
+
+            # File names longer than 255 characters can cause problems on older OSes.
+            if len(name) > 255:
+                name, ext = os.path.splitext(name)
+                name = name[:255 - len(ext)] + ext
+
+        self._name = name
+
+    name = property(_get_name, _set_name)
+
+    # Abstract methods; subclasses *must* define read() and probably should
+    # define open/close.
+    def read(self, num_bytes=None):
+        raise NotImplementedError()
+
+    def open(self):
+        pass
+
+    def close(self):
+        pass
+
+class TemporaryUploadedFile(UploadedFile):
+    """
+    A file uploaded to a temporary location (i.e. stream-to-disk).
+    """
+    def __init__(self, name, content_type, size, charset):
+        super(TemporaryUploadedFile, self).__init__(name, content_type, size, charset)
+        if settings.FILE_UPLOAD_TEMP_DIR:
+            self._file = tempfile.NamedTemporaryFile(suffix='.upload', dir=settings.FILE_UPLOAD_TEMP_DIR)
+        else:
+            self._file = tempfile.NamedTemporaryFile(suffix='.upload')
+
+    def temporary_file_path(self):
+        """
+        Returns the full path of this file.
+        """
+        return self._file.name
+
+    # Most methods on this object get proxied to NamedTemporaryFile.
+    # We can't directly subclass because NamedTemporaryFile is actually a
+    # factory function
+    def read(self, *args):          return self._file.read(*args)
+    def seek(self, offset):         return self._file.seek(offset)
+    def write(self, s):             return self._file.write(s)
+    def __iter__(self):             return iter(self._file)
+    def readlines(self, size=None): return self._file.readlines(size)
+    def xreadlines(self):           return self._file.xreadlines()
+    def close(self):
+        try:
+            return self._file.close()
+        except OSError, e:
+            if e.errno == 2:
+                # Means the file was moved or deleted before the tempfile could unlink it.
+                # Still sets self._file.close_called and calls self._file.file.close()
+                # before the exception
+                return
+            else:
+                raise e
+
+class InMemoryUploadedFile(UploadedFile):
+    """
+    A file uploaded into memory (i.e. stream-to-memory).
+    """
+    def __init__(self, file, field_name, name, content_type, size, charset):
+        super(InMemoryUploadedFile, self).__init__(name, content_type, size, charset)
+        self.file = file
+        self.field_name = field_name
+        self.file.seek(0)
+
+    def seek(self, *args, **kwargs):
+        self.file.seek(*args, **kwargs)
+
+    def open(self):
+        self.seek(0)
+
+    def read(self, *args, **kwargs):
+        return self.file.read(*args, **kwargs)
+
+    def chunks(self, chunk_size=None):
+        self.file.seek(0)
+        yield self.read()
+
+    def multiple_chunks(self, chunk_size=None):
+        # Since it's in memory, we'll never have multiple chunks.
+        return False
+
+class SimpleUploadedFile(InMemoryUploadedFile):
+    """
+    A simple representation of a file, which just has content, size, and a name.
+    """
+    def __init__(self, name, content, content_type='text/plain'):
+        self.file = StringIO(content or '')
+        self.name = name
+        self.field_name = None
+        self.size = len(content or '')
+        self.content_type = content_type
+        self.charset = None
+        self.file.seek(0)
+
+    def from_dict(cls, file_dict):
+        """
+        Creates a SimpleUploadedFile object from
+        a dictionary object with the following keys:
+           - filename
+           - content-type
+           - content
+        """
+        return cls(file_dict['filename'],
+                   file_dict['content'],
+                   file_dict.get('content-type', 'text/plain'))
+
+    from_dict = classmethod(from_dict)