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#!/usr/bin/python from __future__ import unicode_literals from ..utils import floatToGoString CONTENT_TYPE_LATEST = str('application/openmetrics-text; version=0.0.1; charset=utf-8') """Content type of the latest OpenMetrics text format""" def generate_latest(registry): '''Returns the metrics from the registry in latest text format as a string.''' output = [] for metric in registry.collect(): try: mname = metric.name output.append('# HELP {0} {1}\n'.format( mname, metric.documentation.replace('\\', r'\\').replace('\n', r'\n').replace('"', r'\"'))) output.append('# TYPE {0} {1}\n'.format(mname, metric.type)) if metric.unit: output.append('# UNIT {0} {1}\n'.format(mname, metric.unit)) for s in metric.samples: if s.labels: labelstr = '{{{0}}}'.format(','.join( ['{0}="{1}"'.format( k, v.replace('\\', r'\\').replace('\n', r'\n').replace('"', r'\"')) for k, v in sorted(s.labels.items())])) else: labelstr = '' if s.exemplar: if metric.type not in ('histogram', 'gaugehistogram') or not s.name.endswith('_bucket'): raise ValueError("Metric {0} has exemplars, but is not a histogram bucket".format(metric.name)) labels = '{{{0}}}'.format(','.join( ['{0}="{1}"'.format( k, v.replace('\\', r'\\').replace('\n', r'\n').replace('"', r'\"')) for k, v in sorted(s.exemplar.labels.items())])) if s.exemplar.timestamp is not None: exemplarstr = ' # {0} {1} {2}'.format( labels, floatToGoString(s.exemplar.value), s.exemplar.timestamp, ) else: exemplarstr = ' # {0} {1}'.format( labels, floatToGoString(s.exemplar.value), ) else: exemplarstr = '' timestamp = '' if s.timestamp is not None: timestamp = ' {0}'.format(s.timestamp) output.append('{0}{1} {2}{3}{4}\n'.format( s.name, labelstr, floatToGoString(s.value), timestamp, exemplarstr, )) except Exception as exception: exception.args = (exception.args or ('',)) + (metric,) raise output.append('# EOF\n') return ''.join(output).encode('utf-8')