github.com/mier85/go-sensor@v1.30.1-0.20220920111756-9bf41b3bc7e0/eum.go (about) 1 // (c) Copyright IBM Corp. 2021 2 // (c) Copyright Instana Inc. 2018 3 4 package instana 5 6 import ( 7 "bytes" 8 "io/ioutil" 9 "sort" 10 "strings" 11 ) 12 13 const eumTemplate string = "eum.js" 14 15 // EumSnippet generates javascript code to initialize JavaScript agent 16 // 17 // Deprecated: this snippet is outdated and this method will be removed in 18 // the next major version. To learn about the way to install Instana EUM snippet 19 // please refer to https://docs.instana.io/products/website_monitoring/#installation 20 func EumSnippet(apiKey string, traceID string, meta map[string]string) string { 21 22 if len(apiKey) == 0 || len(traceID) == 0 { 23 return "" 24 } 25 26 b, err := ioutil.ReadFile(eumTemplate) 27 if err != nil { 28 return "" 29 } 30 31 snippet := strings.Replace(string(b), "$apiKey", apiKey, -1) 32 snippet = strings.Replace(snippet, "$traceId", traceID, -1) 33 34 var keys []string 35 for k := range meta { 36 keys = append(keys, k) 37 } 38 sort.Strings(keys) 39 40 var metaBuffer bytes.Buffer 41 for _, k := range keys { 42 metaBuffer.WriteString("ineum('meta','" + k + "','" + meta[k] + "');") 43 } 44 45 snippet = strings.Replace(snippet, "$meta", metaBuffer.String(), -1) 46 47 return snippet 48 }