diff options
Diffstat (limited to 'synapse/metrics/metric.py')
| -rw-r--r-- | synapse/metrics/metric.py | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/synapse/metrics/metric.py b/synapse/metrics/metric.py index 89bd47c3f7..1a09e417c9 100644 --- a/synapse/metrics/metric.py +++ b/synapse/metrics/metric.py @@ -16,6 +16,7 @@ from itertools import chain import logging +import re logger = logging.getLogger(__name__) @@ -56,8 +57,7 @@ class BaseMetric(object): return not len(self.labels) def _render_labelvalue(self, value): - # TODO: escape backslashes, quotes and newlines - return '"%s"' % (value) + return '"%s"' % (_escape_label_value(value),) def _render_key(self, values): if self.is_scalar(): @@ -299,3 +299,21 @@ class MemoryUsageMetric(object): "process_psutil_rss:total %d" % sum_rss, "process_psutil_rss:count %d" % len_rss, ] + + +def _escape_character(c): + """Replaces a single character with its escape sequence. + """ + if c == "\\": + return "\\\\" + elif c == "\"": + return "\\\"" + elif c == "\n": + return "\\n" + return c + + +def _escape_label_value(value): + """Takes a label value and escapes quotes, newlines and backslashes + """ + return re.sub(r"([\n\"\\])", lambda m: _escape_character(m.group(1)), value) |