codecrafters submit [skip ci]

1 files changed, 33 insertions, 0 deletions

diff --git a/app/handler.go b/app/handler.go
new file mode 100644
index 0000000..634e4a9
--- /dev/null
+++ b/app/handler.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+func basePathHandler(request *Request) *Response {
+	return NewResponse(Ok, nil, nil)
+}
+
+func echoHandler(request *Request) *Response {
+	message := strings.Split(request.Target(), "/")[2]
+	return NewResponse(Ok, map[string]string{
+		"Content-Type":   "text/plain",
+		"Content-Length": strconv.Itoa(len(message)),
+	}, []byte(message))
+}
+
+func userAgentHandler(request *Request) *Response {
+	header := request.Header("User-Agent")
+	return NewResponse(Ok, map[string]string{
+		"Content-Type":   "text/plain",
+		"Content-Length": strconv.Itoa(len(header)),
+	}, []byte(header))
+}
+
+func Register(builder *RouterBuilder) {
+	builder.Add("GET", regexp.MustCompile("^/$"), basePathHandler)
+	builder.Add("GET", regexp.MustCompile("^/echo/[a-zA-Z]+$"), echoHandler)
+	builder.Add("GET", regexp.MustCompile("^/user-agent$"), userAgentHandler)
+}