added configuration file and logging

binit.cfg

@@ -0,0 +1,8 @@
+##
+## These are comments
+##
+
+host=localhost
+port=8080
+paste_dir=./pastes
+templ_dir=./html

config.go

@@ -0,0 +1,83 @@
+package main
+
+
+import (
+	"fmt"
+	"os"
+	"bufio"
+	"regexp"
+	"strings"
+	"log"
+)
+
+
+type Config struct {
+	host string
+	port string
+	paste_dir string
+	templ_dir string
+	log_fname string
+	logger *log.Logger
+}
+
+
+func (c Config) String() string {
+
+	var s string
+
+	s+= "Host: " + c.host + "\n"
+	s+= "Port: " + c.port + "\n"
+	s+= "paste_dir: " + c.paste_dir + "\n"
+	s+= "templ_dir: " + c.templ_dir + "\n"
+
+	return s
+	
+}
+
+func parse_config (fname string, c *Config) error {
+
+	
+	f, err := os.Open(fname);
+	if  err != nil {
+		return err
+	}
+
+	r := bufio.NewScanner(f)
+
+	line := 0
+	for r.Scan (){
+		s := r.Text()
+		line += 1
+		if matched, _ := regexp.MatchString("^([ \t]*)$", s); matched != true {
+			// it's not a blank line
+			if matched, _ := regexp.MatchString("^#", s); matched != true  {
+				// This is not a comment...
+				if matched, _ := regexp.MatchString("^([a-z_]+)=.*", s);  matched == true {
+					// and contains an assignment
+					fields := strings.Split(s, "=")
+					switch fields[0]{
+					case "host":
+						c.host = fields[1]
+					case "port":
+						c.port = fields[1]
+					case "paste_dir":
+						c.paste_dir = fields[1]					
+					case "templ_dir":
+						c.templ_dir = fields[1]
+					case "log_fname":
+						c.log_fname = fields[1]
+					default:
+						fmt.Fprintf(os.Stderr, "Error reading config file %s at line %d: unknown variable '%s'\n",
+							fname, line, fields[0])
+					}
+				} else {
+					fmt.Fprintf(os.Stderr, "Error reading config file %s at line %d: unknown statement '%s'\n",
+						fname, line, s)
+				}
+			}
+		}
+	}
+	return nil
+}
+
+

main.go

@@ -1,35 +1,49 @@
 package main
 
 import (
-	"fmt"
-	"net/http"
 	"crypto/sha256"
+	"fmt"
+	"io/ioutil"
 	"log"
-	"path/filepath"
+	"net/http"
 	"os"
+	"path/filepath"
 	"time"
-	"io/ioutil"
+	"io"
 )
 
 
-func handle_get_paste(w http.ResponseWriter, r *http.Request){
+var p_conf = Config{
+	host: "localhost",
+	port: "8000",
+	paste_dir: "./pastes",
+	templ_dir: "./tmpl",
+	log_fname: "./binit.log",
+}
+
+
+
+
+func handle_get_paste(w http.ResponseWriter, r *http.Request) {
 
 	var paste_name, orig_name string
 	var err error
 
 	orig_name = filepath.Clean(r.URL.Path)
-	paste_name = "./pastes/" + orig_name
+	paste_name = p_conf.paste_dir + "/" + orig_name
 
-	fmt.Printf("orig_name: '%s'\npaste_name: '%s'\n", orig_name, paste_name)
+	orig_IP := r.RemoteAddr
+	
+	log.Printf("Received GET from %s for  '%s'\n", orig_IP, orig_name)
 
 	// The default is to serve index.html
-	if (orig_name == "/" ) || ( orig_name == "/index.html" ) {
+	if (orig_name == "/") || (orig_name == "/index.html") {
-		http.ServeFile(w, r, "index.html")
+		http.ServeFile(w, r, p_conf.templ_dir + "/index.html")
 	} else {
 		// otherwise, if the requested paste exists, we serve it...
 		if _, err = os.Stat(paste_name); err == nil && orig_name != "./" {
 			http.ServeFile(w, r, paste_name)
-		}	else {
+		} else {
 			// otherwise, we give say we didn't find it
 			fmt.Fprintf(w, "Paste '%s' not found\n", orig_name)
 			return
@@ -37,19 +51,20 @@ func handle_get_paste(w http.ResponseWriter, r *http.Request){
 	}
 }
 
+func handle_put_paste(w http.ResponseWriter, r *http.Request) {
 
 	
-func handle_put_paste(w http.ResponseWriter, r *http.Request){
+	if err := r.ParseForm(); err != nil {
-
-
-	fmt.Printf("We are inside handle_put_paste\n");
-	
-	if err := r.ParseForm(); err != nil{
 		// Invalid POST -- let's serve the default file
-		http.ServeFile(w, r, "index.html")
+		http.ServeFile(w, r, p_conf.templ_dir + "/index.html")
 	} else {
 		h := sha256.New()
 		req_body := r.PostForm
+
+		orig_IP := r.RemoteAddr
+
+		log.Printf("Received new POST from %s\n", orig_IP)
+		
 		// get title, body, and time
 		title := req_body.Get("title")
 		paste := req_body.Get("paste")
@@ -58,31 +73,39 @@ func handle_put_paste(w http.ResponseWriter, r *http.Request){
 		content := fmt.Sprintf("# Title: %s\n# Pasted: %s\n------------\n%s", title, now, paste)
 
 		// ccompute the sha256 hash using title, body, and time
-		h.Write([]byte (content))
+		h.Write([]byte(content))
 
 		paste_hash := fmt.Sprintf("%x", h.Sum(nil))
-		fmt.Printf("hash: %s fname: %s\n", paste_hash, paste_hash[:16])
+		log.Printf("  `-- hash: %s\n", paste_hash)
-		paste_dir := "./pastes/"
+		paste_dir := p_conf.paste_dir + "/"
 
 		// Now we save the file
-		for i := 0; i < len(paste_hash) - 16; i ++ {
+		for i := 0; i < len(paste_hash)-16; i++ {
-
+			paste_name := paste_hash[i:i+16]
-			if _, err := os.Stat(paste_dir + paste_hash[i:i+16]); os.IsNotExist(err) {
+			if _, err := os.Stat(paste_dir + paste_name); os.IsNotExist(err) {
 				// The file does not exist, so we can create it
-				if err := ioutil.WriteFile(paste_dir + paste_hash[i:i+16], []byte (content), 0644); err == nil{
+				if err := ioutil.WriteFile(paste_dir+ paste_name, []byte(content), 0644); err == nil {
 					// and then we return the URL:
-					fmt.Fprintf(w, "<html><body>Link: <a href='%s'>%s</a></body></html>",
+					log.Printf("  `-- saving paste to : %s", paste_dir + paste_name)
-						paste_hash[i:i+16], paste_hash[i:i+16])
+					hostname := r.Host
-					return
+					if show := req_body.Get("show"); show != "" {
+						fmt.Fprintf(w, "%s/%s", hostname, paste_name)
+						return
+					} else{
+						fmt.Fprintf(w, "<html><body>Link: <a href='%s'>%s</a></body></html>",
+							paste_hash[i:i+16], paste_hash[i:i+16])
+						return
+					}
 				} else {
-					fmt.Fprintf(w, "Cannot create the paste!!!\n")
+					fmt.Fprintf(w, "Cannot create the paste.. Sorry!\n")
+					return
 				}
 			}
 		}
 	}
 }
 
-func req_handler(w http.ResponseWriter, r *http.Request){
+func req_handler(w http.ResponseWriter, r *http.Request) {
 
 	switch r.Method {
 	case "GET":
@@ -94,7 +117,29 @@ func req_handler(w http.ResponseWriter, r *http.Request){
 	}
 }
 
-func main(){
+func main() {
+
+	
+	
+	parse_config("binit.cfg", &p_conf)
+	
+
+	f, err := os.OpenFile(p_conf.log_fname, os.O_APPEND | os.O_CREATE | os.O_RDWR, 0600)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error opening logfile: %s. Exiting\n", p_conf.log_fname)
+		os.Exit(1)
+	}
+	
+	log.SetOutput(io.Writer(f))
+	log.SetPrefix("[binit]: ")
+	log.SetFlags(log.Ldate | log.Ltime | log.Lmicroseconds)
+
+	log.Println("Binit version 0.1 -- Starting ")
+	log.Printf("  + listening on: %s:%s\n", p_conf.host, p_conf.port )
+	log.Printf("  + paste_dir: %s\n", p_conf.paste_dir)
+	log.Printf("  + templ_dir: %s\n", p_conf.templ_dir)
+
+	
 	http.HandleFunc("/", req_handler)
-	log.Fatal(http.ListenAndServe("localhost:8000", nil))
+	log.Fatal(http.ListenAndServe(p_conf.host + ":" +  p_conf.port, nil))
 }