Logs: Fix parsing for logfmt fields that have parens (#21407)

* Logs: Fix parsing for logfmt fields that have parens

- added `()`, `[]`, and `{}` to be allowed in logfmt field names

* Fix matcher

packages/grafana-data/src/utils/logs.test.ts

@@ -98,21 +98,25 @@ describe('LogsParsers', () => {
     test('should return parsed fields', () => {
       expect(
         parser.getFields(
-          'foo=bar baz="42 + 1" msg="[resolver] received A record \\"127.0.0.1\\" for \\"localhost.\\" from udp:192.168.65.1"'
+          'foo=bar baz="42 + 1" msg="[resolver] received A record \\"127.0.0.1\\" for \\"localhost.\\" from udp:192.168.65.1" time(ms)=50 label{foo}=bar'
         )
       ).toEqual([
         'foo=bar',
         'baz="42 + 1"',
         'msg="[resolver] received A record \\"127.0.0.1\\" for \\"localhost.\\" from udp:192.168.65.1"',
+        'time(ms)=50',
+        'label{foo}=bar',
       ]);
     });
 
     test('should return label for field', () => {
       expect(parser.getLabelFromField('foo=bar')).toBe('foo');
+      expect(parser.getLabelFromField('time(ms)=50')).toBe('time(ms)');
     });
 
     test('should return value for field', () => {
       expect(parser.getValueFromField('foo=bar')).toBe('bar');
+      expect(parser.getValueFromField('time(ms)=50')).toBe('50');
       expect(
         parser.getValueFromField(
           'msg="[resolver] received A record \\"127.0.0.1\\" for \\"localhost.\\" from udp:192.168.65.1"'
@@ -126,6 +130,13 @@ describe('LogsParsers', () => {
       expect(match).toBeDefined();
       expect(match![1]).toBe('bar');
     });
+
+    test('should build a valid complex value matcher', () => {
+      const matcher = parser.buildMatcher('time(ms)');
+      const match = 'time(ms)=50'.match(matcher);
+      expect(match).toBeDefined();
+      expect(match![1]).toBe('50');
+    });
   });
 
   describe('JSON', () => {

packages/grafana-data/src/utils/logs.ts

-import { countBy, chain } from 'lodash';
+import { countBy, chain, escapeRegExp } from 'lodash';
 
 import { LogLevel, LogRowModel, LogLabelStatsModel, LogsParser } from '../types/logs';
 import { DataFrame, FieldType } from '../types/index';
@@ -8,7 +8,7 @@ import { ArrayVector } from '../vector/ArrayVector';
 // first a label from start of the string or first white space, then any word chars until "="
 // second either an empty quotes, or anything that starts with quote and ends with unescaped quote,
 // or any non whitespace chars that do not start with qoute
-const LOGFMT_REGEXP = /(?:^|\s)(\w+)=(""|(?:".*?[^\\]"|[^"\s]\S*))/;
+const LOGFMT_REGEXP = /(?:^|\s)([\w\(\)\[\]\{\}]+)=(""|(?:".*?[^\\]"|[^"\s]\S*))/;
 
 /**
  * Returns the log level of a log line.
@@ -85,7 +85,7 @@ export const LogsParsers: { [name: string]: LogsParser } = {
   },
 
   logfmt: {
-    buildMatcher: label => new RegExp(`(?:^|\\s)${label}=("[^"]*"|\\S+)`),
+    buildMatcher: label => new RegExp(`(?:^|\\s)${escapeRegExp(label)}=("[^"]*"|\\S+)`),
     getFields: line => {
       const fields: string[] = [];
       line.replace(new RegExp(LOGFMT_REGEXP, 'g'), substring => {