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fix(alerting): Resolve Mattermost issue with bad payload when condition has " in it

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This commit is contained in:
TwiN 2022-10-20 17:05:01 -04:00
parent ade3d05983
commit d101c17136
2 changed files with 54 additions and 36 deletions
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74
alerting/provider/mattermost/mattermost.go
View File

@ -2,6 +2,7 @@ package mattermost
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
@ -68,9 +69,31 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
return err
}
type Body struct {
Text string `json:"text"`
Username string `json:"username"`
IconURL string `json:"icon_url"`
Attachments []Attachment `json:"attachments"`
}
type Attachment struct {
Title string `json:"title"`
Fallback string `json:"fallback"`
Text string `json:"text"`
Short bool `json:"short"`
Color string `json:"color"`
Fields []Field `json:"fields"`
}
type Field struct {
Title string `json:"title"`
Value string `json:"value"`
Short bool `json:"short"`
}
// buildRequestBody builds the request body for the provider
func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
var message, color string
func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
var message, color, results string
if resolved {
message = fmt.Sprintf("An alert for *%s* has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
color = "#36A64F"
@ -78,7 +101,6 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
message = fmt.Sprintf("An alert for *%s* has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
color = "#DD0000"
}
var results string
for _, conditionResult := range result.ConditionResults {
var prefix string
if conditionResult.Success {
@ -86,38 +108,34 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
} else {
prefix = ":x:"
}
results += fmt.Sprintf("%s - `%s`\\n", prefix, conditionResult.Condition)
results += fmt.Sprintf("%s - `%s`\n", prefix, conditionResult.Condition)
}
var description string
if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
description = ":\\n> " + alertDescription
description = ":\n> " + alertDescription
}
return fmt.Sprintf(`{
"text": "",
"username": "gatus",
"icon_url": "https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png",
"attachments": [
body, _ := json.Marshal(Body{
Text: "",
Username: "gatus",
IconURL: "https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png",
Attachments: []Attachment{
{
"title": ":rescue_worker_helmet: Gatus",
"fallback": "Gatus - %s",
"text": "%s%s",
"short": false,
"color": "%s",
"fields": [
Title: ":helmet_with_white_cross: Gatus",
Fallback: "Gatus - " + message,
Text: message + description,
Short: false,
Color: color,
Fields: []Field{
{
"title": "URL",
"value": "%s",
"short": false
Title: "Condition results",
Value: results,
Short: false,
},
{
"title": "Condition results",
"value": "%s",
"short": false
}
]
}
]
}`, message, message, description, color, endpoint.URL, results)
},
},
},
})
return body
}
// getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group

10
alerting/provider/mattermost/mattermost_test.go
View File

@ -155,14 +155,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
Provider: AlertProvider{},
Alert: alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: false,
ExpectedBody: "{\n \"text\": \"\",\n \"username\": \"gatus\",\n \"icon_url\": \"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\n \"attachments\": [\n {\n \"title\": \":rescue_worker_helmet: Gatus\",\n \"fallback\": \"Gatus - An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row\",\n \"text\": \"An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row:\\n> description-1\",\n \"short\": false,\n \"color\": \"#DD0000\",\n \"fields\": [\n {\n \"title\": \"URL\",\n \"value\": \"\",\n \"short\": false\n },\n {\n \"title\": \"Condition results\",\n \"value\": \":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\n \"short\": false\n }\n ]\n }\n ]\n}",
ExpectedBody: "{\"text\":\"\",\"username\":\"gatus\",\"icon_url\":\"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"fallback\":\"Gatus - An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row\",\"text\":\"An alert for *endpoint-name* has been triggered due to having failed 3 time(s) in a row:\\n\\u003e description-1\",\"short\":false,\"color\":\"#DD0000\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
},
{
Name: "resolved",
Provider: AlertProvider{},
Alert: alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
Resolved: true,
ExpectedBody: "{\n \"text\": \"\",\n \"username\": \"gatus\",\n \"icon_url\": \"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\n \"attachments\": [\n {\n \"title\": \":rescue_worker_helmet: Gatus\",\n \"fallback\": \"Gatus - An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row\",\n \"text\": \"An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row:\\n> description-2\",\n \"short\": false,\n \"color\": \"#36A64F\",\n \"fields\": [\n {\n \"title\": \"URL\",\n \"value\": \"\",\n \"short\": false\n },\n {\n \"title\": \"Condition results\",\n \"value\": \":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\n \"short\": false\n }\n ]\n }\n ]\n}",
ExpectedBody: "{\"text\":\"\",\"username\":\"gatus\",\"icon_url\":\"https://raw.githubusercontent.com/TwiN/gatus/master/.github/assets/logo.png\",\"attachments\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"fallback\":\"Gatus - An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row\",\"text\":\"An alert for *endpoint-name* has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"short\":false,\"color\":\"#36A64F\",\"fields\":[{\"title\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n\",\"short\":false}]}]}",
},
}
for _, scenario := range scenarios {
@ -178,11 +178,11 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
},
scenario.Resolved,
)
if body != scenario.ExpectedBody {
t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
if string(body) != scenario.ExpectedBody {
t.Errorf("expected:\n%s\ngot:\n%s", scenario.ExpectedBody, body)
}
out := make(map[string]interface{})
if err := json.Unmarshal([]byte(body), &out); err != nil {
if err := json.Unmarshal(body, &out); err != nil {
t.Error("expected body to be valid JSON, got error:", err.Error())
}
})