Source, SourceType, and Index are all optional

Splunk will pick reasonable defaults if the first two are omitted.

A default index is always assigned when a token in created in Splunk.
However, the JSON request must not refer to a blank index if this
default is to be used.  Without the json omitempty, the log entry is
written to the index "main" where you might not think to look.

Author: CodyDWJones

splunk/splunk.go

@@ -13,20 +13,19 @@ import (
 
 // Event represents the log event object that is sent to Splunk when Client.Log is called.
 type Event struct {
-	Time       int64       `json:"time" binding:"required"`       // epoch time in seconds
-	Host       string      `json:"host" binding:"required"`       // hostname
-	Source     string      `json:"source" binding:"required"`     // app name
-	SourceType string      `json:"sourcetype" binding:"required"` // Splunk bucket to group logs in
-	Index      string      `json:"index" binding:"required"`      // idk what it does..
-	Event      interface{} `json:"event" binding:"required"`      // throw any useful key/val pairs here
+	Time       int64       `json:"time"`                 // epoch time in seconds
+	Host       string      `json:"host"`                 // hostname
+	Source     string      `json:"source,omitempty"`     // optional description of the source of the event; typically the app's name
+	SourceType string      `json:"sourcetype,omitempty"` // optional name of a Splunk parsing configuration; this is usually inferred by Splunk
+	Index      string      `json:"index,omitempty"`      // optional name of the Splunk index to store the event in; not required if the token has a default index set in Splunk
+	Event      interface{} `json:"event"`                // throw any useful key/val pairs here
 }
 
 // Client manages communication with Splunk's HTTP Event Collector.
 // New client objects should be created using the NewClient function.
 //
 // The URL field must be defined and pointed at a Splunk servers Event Collector port (i.e. https://{your-splunk-URL}:8088/services/collector).
 // The Token field must be defined with your access token to the Event Collector.
-// The Source, SourceType, and Index fields must be defined.
 type Client struct {
 	HTTPClient *http.Client // HTTP client used to communicate with the API
 	URL        string