first commit, everything works

fetch.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"os"
+	"strings"
+)
+
+func fetchFileContents(filepath string) ([]byte, error) {
+	if filepath == "/" {
+		filepath = "."
+	} else {
+		filepath_relative, _ := strings.CutPrefix(filepath, "/")
+		filepath = filepath_relative
+	}
+	fileinfo, err := os.Stat(filepath)
+	if err != nil {
+		return nil, err
+	}
+	if fileinfo.IsDir() {
+		filepath += "/index.html"
+	}
+	return os.ReadFile(filepath)
+
+}

log.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+func logIfError(err error) bool {
+	if err != nil {
+		logError(err.Error())
+		return true
+	}
+	return false
+}
+
+// func logAccess(
+// 	remoteAddr, remoteUser, timeLocal, request, status,
+// 	bodyBytesSent, httpReferrer, httpUseragent string,
+// ) {
+// 	out := fmt.Sprintf("%v - %v - [%v] \"%v\" %v %v \"%v\" \"%v\"\n",
+// 		remoteAddr, remoteUser, timeLocal, request, status, bodyBytesSent,
+// 		httpReferrer, httpUseragent,
+// 	)
+// 	file, err := os.OpenFile(PATH_ACCESSLOG, os.O_APPEND|os.O_WRONLY, os.ModeType)
+// 	if err != nil {
+// 		log.Println("couldn't open log access file at", PATH_ACCESSLOG)
+// 	}
+// 	defer file.Close()
+// 	file.WriteString(out)
+// }
+
+func logAccess(
+	remoteAddr, identifier, authuser, timestamp, request,
+	status, bytesSent string,
+) {
+	out := fmt.Sprintf("%v %v %v [%v] \"%v\" %v %v\n",
+		remoteAddr, identifier, authuser, timestamp, request, status, bytesSent,
+	)
+	file, err := os.OpenFile(PATH_ACCESSLOG, os.O_APPEND|os.O_WRONLY, os.ModeType)
+	if err != nil {
+		log.Println("couldn't open log access file at", PATH_ACCESSLOG)
+	}
+	defer file.Close()
+	file.WriteString(out)
+}
+
+func logError(str string) {
+	file, err := os.OpenFile(PATH_ERRORLOG, os.O_APPEND|os.O_WRONLY, os.ModeType)
+	if err != nil {
+		log.Println("couldn't open log error file at", PATH_ACCESSLOG)
+	}
+	defer file.Close()
+	file.WriteString(str + "\n")
+}
+
+func getOrDash(str string) string {
+	if str == "" {
+		return "-"
+	}
+	return str
+}

main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	PATH_ACCESSLOG string = "access.log"
+	PATH_ERRORLOG  string = "error.log"
+)
+
+func main() {
+	http.HandleFunc("/{resource...}", get)
+	log.Println("Server started")
+	http.ListenAndServe(":8080", nil)
+}
+
+func get(writer http.ResponseWriter, req *http.Request) {
+	fetchedData, fetchErr := fetchFileContents(req.URL.Path)
+	respStatusCode := int(200)
+	var sentBytes int = 0
+	if logIfError(fetchErr) {
+		respStatusCode = http.StatusNotFound
+		writer.WriteHeader(respStatusCode)
+	} else {
+		sentBytesCount, _ := writer.Write(fetchedData)
+		sentBytes = sentBytesCount
+	}
+	logAccess(strings.Split(req.RemoteAddr, ":")[0], "-", getOrDash(req.URL.User.Username()), time.Now().Format("02/Jan/2006:03:04:05 -0700"),
+		req.Method+" "+req.URL.Path+" "+getHttpString(req.ProtoMajor, req.ProtoMinor), strconv.Itoa(respStatusCode),
+		strconv.Itoa(sentBytes),
+	)
+}
+
+func getHttpString(major, minor int) string {
+	return "HTTP/" + strconv.Itoa(major) + "." + strconv.Itoa(minor)
+}