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[ML] Fix custom URLs processing for security app (#76957)
* [ML] fix custom urls processing for security app * [ML] improve query string parsing * [ML] remove escaping with !, adjust a unit test for security app * [ML] unit test * [ML] unit test
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‎x-pack/plugins/ml/public/application/util/custom_url_utils.test.ts‎

Lines changed: 106 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -61,8 +61,13 @@ describe('ML - custom URL utils', () => {
6161
influencer_field_name: 'airline',
6262
influencer_field_values: ['<>:;[}")'],
6363
},
64+
{
65+
influencer_field_name: 'odd:field,name',
66+
influencer_field_values: [">:&12<'"],
67+
},
6468
],
6569
airline: ['<>:;[}")'],
70+
'odd:field,name': [">:&12<'"],
6671
};
6772

6873
const TEST_RECORD_MULTIPLE_INFLUENCER_VALUES: CustomUrlAnomalyRecordDoc = {
@@ -98,7 +103,7 @@ describe('ML - custom URL utils', () => {
98103
url_name: 'Raw data',
99104
time_range: 'auto',
100105
url_value:
101-
"discover#/?_g=(time:(from:'$earliest$',mode:absolute,to:'$latest$'))&_a=(index:bf6e5860-9404-11e8-8d4c-593f69c47267,query:(language:kuery,query:'airline:\"$airline$\"'))",
106+
"discover#/?_g=(time:(from:'$earliest$',mode:absolute,to:'$latest$'))&_a=(index:bf6e5860-9404-11e8-8d4c-593f69c47267,query:(language:kuery,query:'airline:\"$airline$\" and odd:field,name : $odd:field,name$'))",
102107
};
103108

104109
const TEST_DASHBOARD_LUCENE_URL: KibanaUrlConfig = {
@@ -263,9 +268,55 @@ describe('ML - custom URL utils', () => {
263268
);
264269
});
265270

266-
test('returns expected URL for a Kibana Discover type URL when record field contains special characters', () => {
271+
test.skip('returns expected URL for a Kibana Discover type URL when record field contains special characters', () => {
267272
expect(getUrlForRecord(TEST_DISCOVER_URL, TEST_RECORD_SPECIAL_CHARS)).toBe(
268-
"discover#/?_g=(time:(from:'2017-02-09T15:10:00.000Z',mode:absolute,to:'2017-02-09T17:15:00.000Z'))&_a=(index:bf6e5860-9404-11e8-8d4c-593f69c47267,query:(language:kuery,query:'airline:\"%3C%3E%3A%3B%5B%7D%5C%22)\"'))"
273+
"discover#/?_g=(time:(from:'2017-02-09T15:10:00.000Z',mode:absolute,to:'2017-02-09T17:15:00.000Z'))&_a=(index:bf6e5860-9404-11e8-8d4c-593f69c47267,query:(language:kuery,query:'airline:\"%3C%3E%3A%3B%5B%7D%5C%22)\" and odd:field,name:>:&12<''))"
274+
);
275+
});
276+
277+
test('correctly encodes special characters inside of a query string', () => {
278+
const testUrl = {
279+
url_name: 'Show dashboard',
280+
time_range: 'auto',
281+
url_value: `dashboards#/view/351de820-f2bb-11ea-ab06-cb93221707e9?_a=(filters:!(),query:(language:kuery,query:'at@name:"$at@name$" and singlequote!'name:"$singlequote!'name$"'))&_g=(filters:!(),time:(from:'$earliest$',mode:absolute,to:'$latest$'))`,
282+
};
283+
284+
const testRecord = {
285+
job_id: 'spec-char',
286+
result_type: 'record',
287+
probability: 0.0028099428534745633,
288+
multi_bucket_impact: 5,
289+
record_score: 49.00785814424704,
290+
initial_record_score: 49.00785814424704,
291+
bucket_span: 900,
292+
detector_index: 0,
293+
is_interim: false,
294+
timestamp: 1549593000000,
295+
partition_field_name: 'at@name',
296+
partition_field_value: "contains a ' quote",
297+
function: 'mean',
298+
function_description: 'mean',
299+
typical: [1993.2657340111837],
300+
actual: [1808.3334418402778],
301+
field_name: 'metric%$£&!{(]field',
302+
influencers: [
303+
{
304+
influencer_field_name: "singlequote'name",
305+
influencer_field_values: ["contains a ' quote"],
306+
},
307+
{
308+
influencer_field_name: 'at@name',
309+
influencer_field_values: ["contains a ' quote"],
310+
},
311+
],
312+
"singlequote'name": ["contains a ' quote"],
313+
'at@name': ["contains a ' quote"],
314+
earliest: '2019-02-08T00:00:00.000Z',
315+
latest: '2019-02-08T23:59:59.999Z',
316+
};
317+
318+
expect(getUrlForRecord(testUrl, testRecord)).toBe(
319+
`dashboards#/view/351de820-f2bb-11ea-ab06-cb93221707e9?_a=(filters:!(),query:(language:kuery,query:'at@name:"contains%20a%20!'%20quote" AND singlequote!'name:"contains%20a%20!'%20quote"'))&_g=(filters:!(),time:(from:'2019-02-08T00:00:00.000Z',mode:absolute,to:'2019-02-08T23:59:59.999Z'))`
269320
);
270321
});
271322

@@ -405,6 +456,58 @@ describe('ML - custom URL utils', () => {
405456
);
406457
});
407458

459+
test('return expected url for Security app', () => {
460+
const urlConfig = {
461+
url_name: 'Hosts Details by process name',
462+
url_value:
463+
"security/hosts/ml-hosts/$host.name$?_g=()&query=(query:'process.name%20:%20%22$process.name$%22',language:kuery)&timerange=(global:(linkTo:!(timeline),timerange:(from:'$earliest$',kind:absolute,to:'$latest$')),timeline:(linkTo:!(global),timerange:(from:'$earliest$',kind:absolute,to:'$latest$')))",
464+
};
465+
466+
const testRecords = {
467+
job_id: 'rare_process_by_host_linux_ecs',
468+
result_type: 'record',
469+
probability: 0.018122957282324745,
470+
multi_bucket_impact: 0,
471+
record_score: 20.513469583273547,
472+
initial_record_score: 20.513469583273547,
473+
bucket_span: 900,
474+
detector_index: 0,
475+
is_interim: false,
476+
timestamp: 1549043100000,
477+
by_field_name: 'process.name',
478+
by_field_value: 'seq',
479+
partition_field_name: 'host.name',
480+
partition_field_value: 'showcase',
481+
function: 'rare',
482+
function_description: 'rare',
483+
typical: [0.018122957282324745],
484+
actual: [1],
485+
influencers: [
486+
{
487+
influencer_field_name: 'user.name',
488+
influencer_field_values: ['sophie'],
489+
},
490+
{
491+
influencer_field_name: 'process.name',
492+
influencer_field_values: ['seq'],
493+
},
494+
{
495+
influencer_field_name: 'host.name',
496+
influencer_field_values: ['showcase'],
497+
},
498+
],
499+
'process.name': ['seq'],
500+
'user.name': ['sophie'],
501+
'host.name': ['showcase'],
502+
earliest: '2019-02-01T16:00:00.000Z',
503+
latest: '2019-02-01T18:59:59.999Z',
504+
};
505+
506+
expect(getUrlForRecord(urlConfig, testRecords)).toBe(
507+
"security/hosts/ml-hosts/showcase?_g=()&query=(language:kuery,query:'process.name:\"seq\"')&timerange=(global:(linkTo:!(timeline),timerange:(from:'2019-02-01T16:00:00.000Z',kind:absolute,to:'2019-02-01T18:59:59.999Z')),timeline:(linkTo:!(global),timerange:(from:'2019-02-01T16%3A00%3A00.000Z',kind:absolute,to:'2019-02-01T18%3A59%3A59.999Z')))"
508+
);
509+
});
510+
408511
test('removes an empty path component with a trailing slash', () => {
409512
const urlConfig = {
410513
url_name: 'APM',

‎x-pack/plugins/ml/public/application/util/custom_url_utils.ts‎

Lines changed: 80 additions & 57 deletions
Original file line numberDiff line numberDiff line change
@@ -8,6 +8,7 @@
88

99
import { get, flow } from 'lodash';
1010
import moment from 'moment';
11+
import rison, { RisonObject, RisonValue } from 'rison-node';
1112

1213
import { parseInterval } from '../../../common/util/parse_interval';
1314
import { escapeForElasticsearchQuery, replaceStringTokens } from './string_utils';
@@ -131,25 +132,78 @@ function escapeForKQL(value: string | number): string {
131132

132133
type GetResultTokenValue = (v: string) => string;
133134

135+
export const isRisonObject = (value: RisonValue): value is RisonObject => {
136+
return value !== null && typeof value === 'object';
137+
};
138+
139+
const getQueryStringResultProvider = (
140+
record: CustomUrlAnomalyRecordDoc,
141+
getResultTokenValue: GetResultTokenValue
142+
) => (resultPrefix: string, queryString: string, resultPostfix: string): string => {
143+
const URL_LENGTH_LIMIT = 2000;
144+
145+
let availableCharactersLeft = URL_LENGTH_LIMIT - resultPrefix.length - resultPostfix.length;
146+
147+
// URL template might contain encoded characters
148+
const queryFields = queryString
149+
// Split query string by AND operator.
150+
.split(/\sand\s/i)
151+
// Get property name from `influencerField:$influencerField$` string.
152+
.map((v) => String(v.split(/:(.+)?\$/)[0]).trim());
153+
154+
const queryParts: string[] = [];
155+
const joinOperator = ' AND ';
156+
157+
fieldsLoop: for (let i = 0; i < queryFields.length; i++) {
158+
const field = queryFields[i];
159+
// Use lodash get to allow nested JSON fields to be retrieved.
160+
let tokenValues: string[] | string | null = get(record, field) || null;
161+
if (tokenValues === null) {
162+
continue;
163+
}
164+
tokenValues = Array.isArray(tokenValues) ? tokenValues : [tokenValues];
165+
166+
// Create a pair `influencerField:value`.
167+
// In cases where there are multiple influencer field values for an anomaly
168+
// combine values with OR operator e.g. `(influencerField:value or influencerField:another_value)`.
169+
let result = '';
170+
for (let j = 0; j < tokenValues.length; j++) {
171+
const part = `${j > 0 ? ' OR ' : ''}${field}:"${getResultTokenValue(tokenValues[j])}"`;
172+
173+
// Build up a URL string which is not longer than the allowed length and isn't corrupted by invalid query.
174+
if (availableCharactersLeft < part.length) {
175+
if (result.length > 0) {
176+
queryParts.push(j > 0 ? `(${result})` : result);
177+
}
178+
break fieldsLoop;
179+
}
180+
181+
result += part;
182+
183+
availableCharactersLeft -= result.length;
184+
}
185+
186+
if (result.length > 0) {
187+
queryParts.push(tokenValues.length > 1 ? `(${result})` : result);
188+
}
189+
}
190+
return queryParts.join(joinOperator);
191+
};
192+
134193
/**
135194
* Builds a Kibana dashboard or Discover URL from the supplied config, with any
136195
* dollar delimited tokens substituted from the supplied anomaly record.
137196
*/
138197
function buildKibanaUrl(urlConfig: UrlConfig, record: CustomUrlAnomalyRecordDoc) {
139198
const urlValue = urlConfig.url_value;
140-
const URL_LENGTH_LIMIT = 2000;
141199

142200
const isLuceneQueryLanguage = urlValue.includes('language:lucene');
143201

144202
const queryLanguageEscapeCallback = isLuceneQueryLanguage
145203
? escapeForElasticsearchQuery
146204
: escapeForKQL;
147205

148-
const commonEscapeCallback = flow(
149-
// Kibana URLs used rison encoding, so escape with ! any ! or ' characters
150-
(v: string): string => v.replace(/[!']/g, '!$&'),
151-
encodeURIComponent
152-
);
206+
const commonEscapeCallback = flow(encodeURIComponent);
153207

154208
const replaceSingleTokenValues = (str: string) => {
155209
const getResultTokenValue: GetResultTokenValue = flow(
@@ -172,65 +226,34 @@ function buildKibanaUrl(urlConfig: UrlConfig, record: CustomUrlAnomalyRecordDoc)
172226
return flow(
173227
(str: string) => str.replace('$earliest$', record.earliest).replace('$latest$', record.latest),
174228
// Process query string content of the URL
229+
decodeURIComponent,
175230
(str: string) => {
176231
const getResultTokenValue: GetResultTokenValue = flow(
177232
queryLanguageEscapeCallback,
178233
commonEscapeCallback
179234
);
235+
236+
const getQueryStringResult = getQueryStringResultProvider(record, getResultTokenValue);
237+
238+
const match = str.match(/(.+)(\(.*\blanguage:(?:lucene|kuery)\b.*?\))(.+)/);
239+
240+
if (match !== null && match[2] !== undefined) {
241+
const [, prefix, queryDef, postfix] = match;
242+
243+
const q = rison.decode(queryDef);
244+
245+
if (isRisonObject(q) && q.hasOwnProperty('query')) {
246+
const [resultPrefix, resultPostfix] = [prefix, postfix].map(replaceSingleTokenValues);
247+
const resultQuery = getQueryStringResult(resultPrefix, q.query as string, resultPostfix);
248+
return `${resultPrefix}${rison.encode({ ...q, query: resultQuery })}${resultPostfix}`;
249+
}
250+
}
251+
180252
return str.replace(
181-
/(.+query:'|.+&kuery=)([^']*)(['&].+)/,
253+
/(.+&kuery=)(.*?)[^!](&.+)/,
182254
(fullMatch, prefix: string, queryString: string, postfix: string) => {
183255
const [resultPrefix, resultPostfix] = [prefix, postfix].map(replaceSingleTokenValues);
184-
185-
let availableCharactersLeft =
186-
URL_LENGTH_LIMIT - resultPrefix.length - resultPostfix.length;
187-
const queryFields = queryString
188-
// Split query string by AND operator.
189-
.split(/\sand\s/i)
190-
// Get property name from `influencerField:$influencerField$` string.
191-
.map((v) => v.split(':')[0]);
192-
193-
const queryParts: string[] = [];
194-
const joinOperator = ' AND ';
195-
196-
fieldsLoop: for (let i = 0; i < queryFields.length; i++) {
197-
const field = queryFields[i];
198-
// Use lodash get to allow nested JSON fields to be retrieved.
199-
let tokenValues: string[] | string | null = get(record, field) || null;
200-
if (tokenValues === null) {
201-
continue;
202-
}
203-
tokenValues = Array.isArray(tokenValues) ? tokenValues : [tokenValues];
204-
205-
// Create a pair `influencerField:value`.
206-
// In cases where there are multiple influencer field values for an anomaly
207-
// combine values with OR operator e.g. `(influencerField:value or influencerField:another_value)`.
208-
let result = '';
209-
for (let j = 0; j < tokenValues.length; j++) {
210-
const part = `${j > 0 ? ' OR ' : ''}${field}:"${getResultTokenValue(
211-
tokenValues[j]
212-
)}"`;
213-
214-
// Build up a URL string which is not longer than the allowed length and isn't corrupted by invalid query.
215-
if (availableCharactersLeft < part.length) {
216-
if (result.length > 0) {
217-
queryParts.push(j > 0 ? `(${result})` : result);
218-
}
219-
break fieldsLoop;
220-
}
221-
222-
result += part;
223-
224-
availableCharactersLeft -= result.length;
225-
}
226-
227-
if (result.length > 0) {
228-
queryParts.push(tokenValues.length > 1 ? `(${result})` : result);
229-
}
230-
}
231-
232-
const resultQuery = queryParts.join(joinOperator);
233-
256+
const resultQuery = getQueryStringResult(resultPrefix, queryString, resultPostfix);
234257
return `${resultPrefix}${resultQuery}${resultPostfix}`;
235258
}
236259
);

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