def parse_multipart_form_data(content_type, body, args, files):
boundary = escape.utf8(content_type.split('boundary=')[-1])
end_index = body.rfind(b'--' + boundary + b'--')
if end_index == -1: # 如果没有结尾符的话，则说明这个主体格式是错误的
gen_log.error('Invalid multipart/form-data: no final boundary')
return
parts = body[:end_index].split(b'--' + boundary + CRLF)
for _part in parts:
if not _part:
continue
_args_part, _body_part = _part.split(CRLF * 2)[:2]
body = _body_part[:-2]
headers = HTTPHeaders._parse_headers(_args_part) # 这里的headers是指某一个数据块的头部信息
con_dis = headers.get(b'Content-Disposition', None)
if not con_dis:
gen_log.error('must have Content-Disposition')
return
con_dis = parse_content_disposition(con_dis)
name = escape.to_unicode(con_dis[b'name'])
if b'filename' in con_dis: # 如果有filename，则表示这是一个文件
filename = con_dis.get(b'filename')
if not filename:
continue
files.setdefault(name, []).append(
HTTPFile(filename = escape.to_unicode(filename), body = body,
content_type = escape.to_unicode(headers.get(b'Content-Type', 'application/octet-stream'))))
else:
args.setdefault(name, []).append(escape.to_unicode(body))
def __init__(self, template_string, name="<string>", loader=None,
compress_whitespace=None, autoescape=_UNSET):
self.name = name
if compress_whitespace is None:
compress_whitespace = name.endswith(".html") or \
name.endswith(".js")
if autoescape is not _UNSET:
self.autoescape = autoescape
elif loader:
self.autoescape = loader.autoescape
else:
self.autoescape = _DEFAULT_AUTOESCAPE
self.namespace = loader.namespace if loader else {}
reader = _TemplateReader(name, escape.native_str(template_string))
self.file = _File(self, _parse(reader, self))
self.code = self._generate_python(loader, compress_whitespace)
self.loader = loader
try:
# Under python2.5, the fake filename used here must match
# the module name used in __name__ below.
# The dont_inherit flag prevents template.py's future imports
# from being applied to the generated code.
self.compiled = compile(
escape.to_unicode(self.code),
"%s.generated.py" % self.name.replace('.', '_'),
"exec", dont_inherit=True)
except Exception:
formatted_code = _format_code(self.code).rstrip()
gen_log.error("%s code:\n%s", self.name, formatted_code)
raise
