98 lines
2.0 KiB
Go
98 lines
2.0 KiB
Go
package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"net/http"
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"time"
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)
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type PersonRequest struct {
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Name string
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Age int
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}
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type PersonResponse struct {
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Greeting string
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Errors string
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}
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type StatusResponse struct {
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StartDateTime string
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UpTime string
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Status string
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}
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var startTime = time.Now()
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func main() {
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portPtr := flag.Int("port", 8080, "port for webserver")
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flag.Parse()
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port := *portPtr
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fmt.Printf("Server is listening on port: %d", port)
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server := http.NewServeMux()
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server.HandleFunc("/status", statusHandler)
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server.HandleFunc("/greeting", greetingHandler)
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err := http.ListenAndServe(fmt.Sprintf("localhost:%d", port), server)
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if err != nil {
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fmt.Println("Error:", err)
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return
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}
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}
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func greetingHandler(writer http.ResponseWriter, request *http.Request) {
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decoder := json.NewDecoder(request.Body)
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decoder.DisallowUnknownFields()
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var p = PersonRequest{}
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errDecode := decoder.Decode(&p)
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if errDecode != nil {
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println("Error: ", errDecode)
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writer.WriteHeader(400)
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_, _ = writer.Write([]byte("Bad request data"))
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return
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}
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r := PersonResponse{
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Greeting: fmt.Sprintf("Hey %s. Your age is %d", p.Name, p.Age),
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Errors: "",
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}
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writer.Header().Add("Content-Type", "application/json")
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encoder := produceEncoder(writer)
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errEncode := encoder.Encode(&r)
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if errEncode != nil {
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writer.WriteHeader(500)
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println("Error: ", errEncode)
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return
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}
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writer.WriteHeader(200)
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}
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func produceEncoder(writer http.ResponseWriter) *json.Encoder {
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encoder := json.NewEncoder(writer)
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return encoder
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}
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func statusHandler(writer http.ResponseWriter, _ *http.Request) {
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upTime := time.Now().Unix() - startTime.Unix()
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status := StatusResponse{
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Status: "Ok",
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StartDateTime: startTime.Format("2006-01-02 15:04:05.000-0700"),
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UpTime: fmt.Sprintf("%d", upTime),
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}
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writer.Header().Add("Content-Type", "application/json")
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encoder := produceEncoder(writer)
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errEncode := encoder.Encode(&status)
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if errEncode != nil {
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writer.WriteHeader(500)
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println("Error: ", errEncode)
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return
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}
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writer.WriteHeader(200)
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}
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