feat: proxy configuration

package.json

@@ -1,6 +1,6 @@
 {
   "name": "splunk-slack-alerts",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "description": "Slack alert action for Splunk Enterprise",
   "private": true,
   "splunk": {

src/app/README/alert_actions.conf.spec

@@ -11,6 +11,9 @@ param.webhook_url = <string>
 * The webhook URL to send the Slack message requests to. This can be obtained
 * by creating a new "Incoming webhook" integration in Slack.
 
+param.http_proxy = <string>
+* your proxy http://proxy:port
+
 param.from_user = <string>
 * DEPRECATED - This is only used in the deprecated webhook_url parameter.
 * The name of the user sending the Slack message. By default this is "Splunk".

src/app/README/savedsearches.conf.spec

@@ -27,3 +27,6 @@ action.slack.param.slack_app_oauth_token_override = <string>
 action.slack.param.webhook_url_override = <string>
 * Override the Slack webhook URL for a single alert. This useful when wanting
 * to send some alerts to different Slack teams.
+
+action.slack.param.proxy_url_override = <string>
+* Override Proxy setting for single alert.

src/app/bin/slack.py

@@ -103,6 +103,18 @@ def send_slack_message(payload):
         config = payload.get('configuration')
         body = json.dumps(build_slack_message(payload))
 
+        http_proxy = config.get('http_proxy', '')
+
+        if config.get('proxy_url_override'):
+            http_proxy = config.get('proxy_url_override', '')
+            log("DEBUG Using proxy URL from proxy_url_override: %s" % http_proxy)
+
+        req = urllib.request
+        if http_proxy:
+            proxy_handler = req.ProxyHandler({ 'http': "%s" % http_proxy, 'https': "%s" % http_proxy})
+            opener = req.build_opener(proxy_handler)
+            req.install_opener(opener) 
+
         # Since Slack webhook URLs are deprecated, we will bias towards using Slack Apps, if they are provided
         is_using_slack_app = (("slack_app_oauth_token" in config and config["slack_app_oauth_token"]) or ("slack_app_oauth_token_override" in config and config["slack_app_oauth_token_override"]))
         if is_using_slack_app:
@@ -114,7 +126,7 @@ def send_slack_message(payload):
                 log("INFO Using configured Slack App OAuth token: %s" % token)
 
             log('DEBUG Calling url="https://slack.com/api/chat.postMessage" with token=%s and body=%s' % (token, body))
-            req = urllib.request.Request("https://slack.com/api/chat.postMessage", ensure_binary(body), {"Content-Type": "application/json", 'Authorization': "Bearer %s" % token})
+            msg_req = req.Request("https://slack.com/api/chat.postMessage", ensure_binary(body), {"Content-Type": "application/json", 'Authorization': "Bearer %s" % token})
 
         # To preserve backwards compatibility, we will fallback to the webhook_url configuration, if a Slack App OAuth token is not provided
         else:
@@ -133,10 +145,10 @@ def send_slack_message(payload):
                 return ERROR_CODE_VALIDATION_FAILED
 
             log('DEBUG Calling url="%s" with body=%s' % (url, body))
-            req = urllib.request.Request(url, ensure_binary(body), {"Content-Type": "application/json"})
+            msg_req = req.Request(url, ensure_binary(body), {"Content-Type": "application/json"})
 
         try:
-            res = urllib.request.urlopen(req)
+            res = urllib.request.urlopen(msg_req)
             res_body = str(res.read())
             log("INFO Slack API responded with HTTP status=%d" % res.code)
             log("DEBUG Slack API response: %s" % res_body)

src/app/default/alert_actions.slap.conf

@@ -18,4 +18,5 @@ param.attachment_alert_title = :bell: {search_name}
 param.attachment_adhoc_title = :zap: Ad-hoc search
 param.attachment_results_link = <{results_link}|Show results in Splunk> :mag:
 param.attachment_footer_text = Splunk Alert
-param.attachment_fallback = Alert generated by Splunk: {results_link}
+param.attachment_fallback = Alert generated by Splunk: {results_link}
+param.http_proxy =

src/app/default/data/ui/alerts/slack.html

@@ -56,6 +56,20 @@
             </span>
         </div>
     </div>
+    <div style="clear: both;" class="control-group">
+        <label class="control-label" for="proxy_url_override">Proxy URL</label>
+        <div class="controls">
+            <input
+                type="text"
+                name="action.slack.param.proxy_url_override"
+                id="slack_fields"
+                placeholder="Optional"
+            />
+            <span class="help-block">
+                You can override the default proxy setting. Use <code>http://yourproxy:port </code>
+            </span>
+        </div>
+    </div>
     <br clear="both" />
     <div style="clear: both" class="control-group">
         <label class="control-label" for="slack_url_override">Webhook URL</label>

src/ui/pages/slack_alerts_setup/api.js

@@ -17,6 +17,7 @@ export function loadAlertActionConfig() {
                 webhook_url: d['param.webhook_url'],
                 from_user: d['param.from_user'],
                 from_user_icon: d['param.from_user_icon'],
+                http_proxy: d['param.http_proxy'],
             };
         });
 }
@@ -31,6 +32,7 @@ export function updateAlertActionConfig(data) {
                 `param.webhook_url=${encodeURIComponent(data.webhook_url)}`,
                 `param.from_user=${encodeURIComponent(data.from_user)}`,
                 `param.from_user_icon=${encodeURIComponent(data.from_user_icon)}`,
+                `param.http_proxy=${encodeURIComponent(data.http_proxy)}`,
             ].join('&'),
             headers: {
                 'Content-Type': 'application/x-www-form-urlencoded',

src/ui/pages/slack_alerts_setup/form.jsx

@@ -19,11 +19,13 @@ export function SetupForm() {
     const updateUrl = useCallback((e, { value }) => update({ ...data, webhook_url: value }));
     const updateUser = useCallback((e, { value }) => update({ ...data, from_user: value }));
     const updateUserIcon = useCallback((e, { value }) => update({ ...data, from_user_icon: value }));
+    const updateProxy = useCallback((e, { value }) => update({ ...data, http_proxy: value }));
 
     const slackAppOauthToken = loading ? '' : data.slack_app_oauth_token;
     const webhookUrl = loading ? '' : data.webhook_url;
     const fromUserName = loading ? '' : data.from_user;
     const fromUserIcon = loading ? '' : data.from_user_icon;
+    const httpProxy = loading ? '' : data.http_proxy;
 
     const oauth_app_manifest = `
 display_information:
@@ -144,6 +146,20 @@ settings:
             </TabLayout>
 
             <div style={{ margin: 20 }}>
+                <Heading level={3}>Proxy Setting</Heading>
+                <Paragraph>
+                    The following settings will configure the default proxy server for slack alerts.
+                </Paragraph>
+                <FormWrapper>
+                    <ControlGroup label="Proxy URL" help="Configure proxy, leave empty if you don't need proxy">
+                        <Text
+                            value={httpProxy}
+                            onChange={updateProxy}
+                            disabled={loading}
+                            placeholder="http://yourproxy:port"
+                        />
+                    </ControlGroup>
+                </FormWrapper>
                 <Heading level={3}>Message Appearance</Heading>
                 <Paragraph>
                     The following settings will influence how messages will show up in Slack.{' '}