From b533c08f92ae4dcfe3fb7e7bffc4eda796918382 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Fri, 1 Nov 2024 22:25:02 -0400
Subject: implement server POST humidity

---
 Makefile  | 10 ++++++++++
 server.go | 21 +++++++++++++++------
 2 files changed, 25 insertions(+), 6 deletions(-)
 create mode 100644 Makefile

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8954492
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+SRC = server.go record.go
+
+server: ${SRC}
+	go build $^
+
+fmt:
+	gofmt -l -s -w ${SRC}
+
+clean:
+	rm -f server
diff --git a/server.go b/server.go
index 67d153d..2684c3e 100644
--- a/server.go
+++ b/server.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"strconv"
 )
 
 const addr = ":9090"
@@ -16,7 +17,8 @@ func newHumidityHandler() humidityHandler {
 	return humidityHandler{newRecord[float32]()}
 }
 
-func (h *humidityHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+func (h humidityHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	log.Println(r.Method, r.URL)
 	switch r.Method {
 	case http.MethodGet:
 		h.get(w, r)
@@ -28,7 +30,7 @@ func (h *humidityHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-func (h *humidityHandler) get(w http.ResponseWriter, r *http.Request) {
+func (h humidityHandler) get(w http.ResponseWriter, r *http.Request) {
 	c := make(chan float32)
 	h.humidity.getRecent <- c
 	humidity, ok := <-c
@@ -37,15 +39,22 @@ func (h *humidityHandler) get(w http.ResponseWriter, r *http.Request) {
 		fmt.Fprintf(w, "no humidity data stored on server")
 		return
 	}
-	fmt.Fprintf(w, "%f", humidity)
+	fmt.Fprintf(w, "%.2f", humidity)
 }
 
-func (h *humidityHandler) post(w http.ResponseWriter, r *http.Request) {
-	w.WriteHeader(http.StatusNotImplemented)
+func (h humidityHandler) post(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.RawQuery
+	humidity, err := strconv.ParseFloat(query, 32)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		fmt.Fprintf(w, "invalid query string: '%s'", query)
+		return
+	}
+	h.humidity.put <- float32(humidity)
 }
 
 func main() {
-	http.Handle("/humidity", new(humidityHandler))
+	http.Handle("/humidity", newHumidityHandler())
 	fmt.Printf("Listening on %s...\n", addr)
 	log.Fatal(http.ListenAndServe(addr, nil))
 }
-- 
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