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GO Basic Microservice
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api: | |
container_name: app | |
build: ./ | |
ports: | |
- 8080:8080 | |
volumes: | |
- ./:/go/src/github.com/lucatironi/hello |
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FROM golang:onbuild | |
EXPOSE 8080 |
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package main | |
import ( | |
"encoding/json" | |
"log" | |
"net/http" | |
"time" | |
) | |
func Logger(inner http.HandlerFunc, name string) http.HandlerFunc { | |
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | |
start := time.Now() | |
inner.ServeHTTP(w, r) | |
log.Printf( | |
"%s\t%s\t%s\t%s", | |
r.Method, | |
r.RequestURI, | |
name, | |
time.Since(start), | |
) | |
}) | |
} | |
type HealthCheckStatus struct { | |
Status string `json:"status"` | |
} | |
func HealthCheckHandler(w http.ResponseWriter, r *http.Request) { | |
message := HealthCheckStatus{"OK"} | |
w.Header().Set("Content-Type", "application/json; charset=UTF-8") | |
w.WriteHeader(http.StatusOK) | |
if err := json.NewEncoder(w).Encode(message); err != nil { | |
panic(err) | |
} | |
} | |
func main() { | |
http.HandleFunc("/", Logger(HealthCheckHandler, "health#check")) | |
log.Printf("Service listening on port 8080") | |
log.Fatal(http.ListenAndServe(":8080", nil)) | |
} |
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package main | |
import ( | |
"encoding/json" | |
"net/http" | |
"net/http/httptest" | |
"testing" | |
) | |
func TestHealthCheckHandler(t *testing.T) { | |
req, err := http.NewRequest("GET", "/", nil) | |
if err != nil { | |
t.Fatal(err) | |
} | |
rec := httptest.NewRecorder() | |
handler := http.HandlerFunc(HealthCheckHandler) | |
handler.ServeHTTP(rec, req) | |
expectedStatusCode := http.StatusOK | |
if statusCode := rec.Code; statusCode != expectedStatusCode { | |
t.Errorf("handler returned wrong status code: got %v want %v", | |
statusCode, expectedStatusCode) | |
} | |
expectedContentType := "application/json; charset=UTF-8" | |
if contentType := rec.Header().Get("Content-Type"); contentType != expectedContentType { | |
t.Errorf("handler returned wrong Content-Type: got %v want %v", | |
contentType, expectedContentType) | |
} | |
var body HealthCheckStatus | |
json.Unmarshal(rec.Body.Bytes(), &body) | |
expectedBody := HealthCheckStatus{"OK"} | |
if body != expectedBody { | |
t.Errorf("handler returned unexpected body: got `%v` want `%v`", | |
body, expectedBody) | |
} | |
} |
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