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Remove newlines from XML responses

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This is a second attempt at resolving the issues with producing an XML consistent with what is produced from AWS (i.e., no spaces/new lines between tags). Another attempt (https://github.com/spulec/moto/pull/2205) is currently failing in tests.

This attempt uses precompiled regex patterns as class attributes of the `_TemplateEnvironmentMixin` to remove trailing spaces and newlines after a `">"`, and preceding newlines/spaces before a `"<"`. This *explicitly* wasn't done with a single regex to ensure that even things like `"...<ID>\n      12345\n    </ID>"` are properly collapsed.
This commit is contained in:
Patrick Mende 2019-10-30 14:08:24 -07:00 committed by GitHub
parent 8f3116220c
commit 5cccb03c91
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1 changed files with 8 additions and 1 deletions
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9
moto/core/responses.py
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@ -83,6 +83,8 @@ class DynamicDictLoader(DictLoader):
class _TemplateEnvironmentMixin(object):
LEFT_PATTERN = re.compile(r"[\s\n]+<")
RIGHT_PATTERN = re.compile(r">[\s\n]+")
def __init__(self):
super(_TemplateEnvironmentMixin, self).__init__()
@ -101,7 +103,12 @@ class _TemplateEnvironmentMixin(object):
def response_template(self, source):
template_id = id(source)
if not self.contains_template(template_id):
self.loader.update({template_id: source})
collapsed = re.sub(
self.RIGHT_PATTERN,
">",
re.sub(self.LEFT_PATTERN, "<", source)
)
self.loader.update({template_id: collapsed})
self.environment = Environment(loader=self.loader, autoescape=self.should_autoescape, trim_blocks=True,
lstrip_blocks=True)
return self.environment.get_template(template_id)