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65 changes: 65 additions & 0 deletions
65
internal/component/compute/process/examples/go/restrict/main.go
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,65 @@ | ||
package main | ||
|
||
import ( | ||
"github.com/extism/go-pdk" | ||
"slices" | ||
"strings" | ||
) | ||
|
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//export process | ||
func process() int32 { | ||
in := pdk.Input() | ||
pt, err := parsePassthrough(in) | ||
if err != nil { | ||
pdk.SetError(err) | ||
return 1 | ||
} | ||
allowed := pt.Config["allowed_services"] | ||
allowedServices := strings.Split(allowed, ",") | ||
// If allowed is empty then allow all. | ||
if len(allowedServices) == 0 { | ||
pdk.Output(in) | ||
return 0 | ||
} | ||
// Could practice to pass along things unchanged unless | ||
// you explicitly don't want them to. | ||
outPT := &Passthrough{ | ||
Prommetrics: make([]*PrometheusMetric, 0), | ||
Metrics: pt.Metrics, | ||
Logs: pt.Logs, | ||
Traces: pt.Traces, | ||
} | ||
for _, metric := range pt.Prommetrics { | ||
// Check for the service label | ||
var serviceValue string | ||
for _, lbl := range metric.Labels { | ||
if lbl.Name == "service" { | ||
serviceValue = lbl.Value | ||
break | ||
} | ||
} | ||
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if serviceValue == "" { | ||
continue | ||
} | ||
if slices.Contains(allowedServices, serviceValue) { | ||
outPT.Prommetrics = append(outPT.Prommetrics, metric) | ||
} | ||
} | ||
bb, err := outPT.MarshalVT() | ||
if err != nil { | ||
pdk.SetError(err) | ||
return 1 | ||
} | ||
pdk.Output(bb) | ||
return 0 | ||
} | ||
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func parsePassthrough(bb []byte) (*Passthrough, error) { | ||
pt := &Passthrough{} | ||
err := pt.UnmarshalVT(bb) | ||
return pt, err | ||
} | ||
|
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// this has to exist to compile with tinygo | ||
func main() {} |
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