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utils.go
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utils.go
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package elasticapm
import (
"os"
"regexp"
"runtime"
"strings"
"github.com/pkg/errors"
"github.com/elastic/apm-agent-go/internal/apmstrings"
"github.com/elastic/apm-agent-go/model"
)
var (
currentProcess model.Process
goAgent = model.Agent{Name: "go", Version: AgentVersion}
goLanguage = model.Language{Name: "go", Version: runtime.Version()}
goRuntime = model.Runtime{Name: runtime.Compiler, Version: runtime.Version()}
localSystem model.System
serviceNameInvalidRegexp = regexp.MustCompile("[^" + serviceNameValidClass + "]")
)
const (
envHostname = "ELASTIC_APM_HOSTNAME"
serviceNameValidClass = "a-zA-Z0-9 _-"
)
func init() {
currentProcess = getCurrentProcess()
localSystem = getLocalSystem()
}
func getCurrentProcess() model.Process {
ppid := os.Getppid()
title, err := currentProcessTitle()
if err != nil {
title = os.Args[0]
}
return model.Process{
Pid: os.Getpid(),
Ppid: &ppid,
Title: truncateString(title),
Argv: os.Args,
}
}
func makeService(name, version, environment string) model.Service {
return model.Service{
Name: truncateString(name),
Version: truncateString(version),
Environment: truncateString(environment),
Agent: goAgent,
Language: &goLanguage,
Runtime: &goRuntime,
}
}
func getLocalSystem() model.System {
system := model.System{
Architecture: runtime.GOARCH,
Platform: runtime.GOOS,
}
system.Hostname = os.Getenv(envHostname)
if system.Hostname == "" {
if hostname, err := os.Hostname(); err == nil {
system.Hostname = hostname
}
}
system.Hostname = truncateString(system.Hostname)
return system
}
func validTagKey(k string) bool {
return !strings.ContainsAny(k, `.*"`)
}
func validateServiceName(name string) error {
idx := serviceNameInvalidRegexp.FindStringIndex(name)
if idx == nil {
return nil
}
return errors.Errorf(
"invalid service name %q: character %q is not in the allowed set (%s)",
name, name[idx[0]], serviceNameValidClass,
)
}
func sanitizeServiceName(name string) string {
return serviceNameInvalidRegexp.ReplaceAllString(name, "_")
}
func truncateString(s string) string {
// At the time of writing, all length limits are 1024.
return apmstrings.Truncate(s, 1024)
}