adding oauth token support

Author: hriprsd

README.md

@@ -34,6 +34,9 @@ To setup an Incoming Webhook, go to
 - `url`: *Required.* The webhook URL as provided by Slack. Usually
   in the form: `https://hooks.slack.com/services/XXXX`.
 
+- `token`: *Optional.* The slack token to use for the API calls. Usually
+  in the form: `xoxb-XXXX`. ** Required parameter if `url` not specified **
+
 - `insecure`: *Optional.* Connect to Slack insecurely - i.e. skip
   SSL validation. Defaults to `false` if not provided.
 

out

@@ -24,7 +24,8 @@ if [[ ${disable} == "true" ]]; then
     exit 0
 fi
 
-webhook_url=$(   jq --raw-output '.source.url'                 <<< "${payload}")
+webhook_url="$(  jq --raw-output '.source.url // "https://slack.com/api/chat.postMessage"' < "${payload}")"
+oauth_token="$(  jq --raw-output '.source.token' < "${payload}")"
 allow_insecure=$(jq --raw-output '.source.insecure // "false"' <<< "${payload}")
 raw_ca_certs=$(  jq              '.source.ca_certs // []'      <<< "${payload}")
 
@@ -174,24 +175,44 @@ EOF
             )
         elif [[ "${silent}" == "true" ]]; then
             echo "INFO: using silent output"
-            curl --silent --fail --show-error --location "${CURL_OPTIONS[@]}" \
-                --request "POST" --url "${webhook_url}" \
-                --data-raw "${compact_body}"
+            if [[ -n ${oauth_token} ]]; then
+                curl -s -X POST -H 'Content-type: application/json' \
+                     -H "Authorization: Bearer ${oauth_token}" \
+                     -T /tmp/compact_body.json ${CURL_OPTION} "${webhook_url}"
+            else
+                curl --silent --fail --show-error --location "${CURL_OPTIONS[@]}" \
+                    --request "POST" --url "${webhook_url}" \
+                    --data-raw "${compact_body}"
+            fi
             curl_errors=$(( ${curl_errors} + $? ))
         elif [[ "${redact_hook}" == "true" ]]; then
             url_path=$(
                 sed -Ee 's,https?://[^/]*(/[^?&#]*).*,\1,' <<< "${webhook_url}"
             )
-            curl --verbose --silent --fail --show-error --location "${CURL_OPTIONS[@]}" \
-                    --request "POST" --url "${webhook_url}" \
-                    --data-raw "${compact_body}" 2>&1 \
-                | sed -e "s#${url_path}#***WEBHOOK URL REDACTED***#g"
+            if [[ -n ${oauth_token} ]]; then
+                curl -v -X POST -H 'Content-type: application/json' \
+                     -H "Authorization: Bearer ${oauth_token}" \
+                     -T /tmp/compact_body.json \
+                     ${CURL_OPTION} "${webhook_url}" 2>&1 | sed -e "s#${url_path}#***WEBHOOK URL REDACTED***#g"
+            else
+                curl --verbose --silent --fail --show-error --location "${CURL_OPTIONS[@]}" \
+                        --request "POST" --url "${webhook_url}" \
+                        --data-raw "${compact_body}" 2>&1 \
+                    | sed -e "s#${url_path}#***WEBHOOK URL REDACTED***#g"
+            fi
             curl_errors=$(( ${curl_errors} + ${PIPESTATUS[0]} ))
         else
-            curl --verbose --silent --fail --show-error --location "${CURL_OPTIONS[@]}" \
-                    --request "POST" --url "${webhook_url}" \
-                    --data-raw "${compact_body}" \
-                | sed -e "s#${url_path}#***WEBHOOK URL REDACTED***#g"
+            if [[ -n ${oauth_token} ]]; then
+                curl -v -X POST -H 'Content-type: application/json' \
+                     -H "Authorization: Bearer ${oauth_token}" \
+                     -T /tmp/compact_body.json \
+                     ${CURL_OPTION} "${webhook_url}" | sed -e "s#${url_path}#***WEBHOOK URL REDACTED***#g"
+            else
+                curl --verbose --silent --fail --show-error --location "${CURL_OPTIONS[@]}" \
+                        --request "POST" --url "${webhook_url}" \
+                        --data-raw "${compact_body}" \
+                    | sed -e "s#${url_path}#***WEBHOOK URL REDACTED***#g"
+            fi
             curl_errors=$(( ${curl_errors} + ${PIPESTATUS[0]} ))
         fi
     fi