Created
September 14, 2015 13:26
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Simple Go URL Shortener. No persistence, just stores everything in memory.
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package main | |
import ( | |
"fmt" | |
"net/http" | |
"strconv" | |
) | |
type ShortURL struct { | |
ID uint64 | |
URL string | |
Hits uint64 | |
} | |
var shortURLs map[string]ShortURL | |
var lastID uint64 | |
func redirectHandler(w http.ResponseWriter, r *http.Request) { | |
prefix := "/tyn" | |
if len(r.URL.Path) > len(prefix) { | |
shortCode := r.URL.Path[len(prefix):] | |
if shortURL, ok := shortURLs[shortCode]; ok { | |
// fmt.Fprintf(w, "%s -> %v", shortCode, shortURL) | |
http.Redirect(w, r, shortURL.URL, 301) | |
} else { | |
http.NotFound(w, r) | |
} | |
} else { | |
fmt.Fprintf(w, "HELLO!") | |
} | |
} | |
func newURLHandler(w http.ResponseWriter, r *http.Request) { | |
// newURL := r.URL.Path[len("/new/"):] | |
newURL := r.FormValue("url") | |
lastID++ | |
newShortURL := ShortURL{lastID, newURL, 0} | |
newHash := strconv.FormatUint(lastID*3, 36) | |
shortURLs[newHash] = newShortURL | |
fmt.Fprintf(w, "New url: %v", newShortURL) | |
fmt.Fprintf(w, "New hash: %s", newHash) | |
} | |
func allURLsHandler(w http.ResponseWriter, r *http.Request) { | |
fmt.Fprintf(w, "All urls: %v", shortURLs) | |
} | |
func main() { | |
shortURLs = make(map[string]ShortURL) | |
lastID = 1500 | |
http.HandleFunc("/", redirectHandler) | |
http.HandleFunc("/new/", newURLHandler) | |
http.HandleFunc("/all/", allURLsHandler) | |
http.ListenAndServe(":8080", nil) | |
} |
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