Initial implementation of getBasicAuth, a *Context helper method

pbdeuchler · pbdeuchler · commit 90a5c6a3b583 · 2013-06-26T12:07:00.000-04:00
Fixed implementation

Added extra error checking
diff --git a/helpers.go b/helpers.go
@@ -2,6 +2,8 @@ package web
 
 import (
     "bytes"
+    "encoding/base64"
+    "errors"
     "net/http"
     "net/url"
     "os"
@@ -88,3 +90,22 @@ func NewCookie(name string, value string, age int64) *http.Cookie {
     }
     return &http.Cookie{Name: name, Value: value, Expires: utctime}
 }
+
+// GetBasicAuth is a helper method of *Context that returns the decoded 
+// user and password from the *Context's authorization header
+func (ctx *Context) GetBasicAuth() (string, string, error) {
+    authHeader := ctx.Request.Header["Authorization"][0]
+    authString := strings.Split(string(authHeader), " ")
+    if authString[0] != "Basic" {
+        return "", "", errors.New("Not Basic Authentication")
+    }
+    decodedAuth, err := base64.StdEncoding.DecodeString(authString[1])
+    if err != nil {
+        return "", "", err
+    }
+    authSlice := strings.Split(string(decodedAuth), ":")
+    if len(authSlice) != 2 {
+        return "", "", errors.New("Error delimiting authString into username/password. Malformed input: " + authString[1])
+    }
+    return authSlice[0], authSlice[1], nil
+}
