Initial stab at http authentication (basic + digest) in new http stack.

General design:
- class HttpAuth -- utility class for http-auth logic.
- class HttpAuth::ChallengeTokenizer -- parsing of www-Authenticate headers.
- class HttpAuthHandler -- base class for authentication schemes (inspired by nsIHttpAuthenticator)
- class HttpAuthHandlerBasic : HttpAuthHandler -- logic for basic auth.
- class HttpAuthHandlerDigest : HttpAuthHandler -- logic for digest auth.
- The auth integration in HttpNetworkTransaction mimics that of HttpTransactionWinHttp:
  + HttpNetworkTransaction::ApplyAuth() -- set the authorization headers.
  + HttpNetworkTransaction::PopulateAuthChallenge() -- process the challenges.

BUG=2346

Review URL: http://codereview.chromium.org/4063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@2658 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 22 insertions, 0 deletions

diff --git a/net/base/net_util.cc b/net/base/net_util.cc
index 305cbcc..57448af 100644
--- a/net/base/net_util.cc
+++ b/net/base/net_util.cc
@@ -913,4 +913,26 @@ bool IsPortAllowedByFtp(int port) {
   return IsPortAllowedByDefault(port);
 }
 
+std::string GetImplicitPort(const GURL& url) {
+  if (url.has_port())
+    return url.port();
+
+  // TODO(eroman): unify with DefaultPortForScheme()
+  // [url_canon_stdurl.cc]
+
+  static const struct {
+    const char* scheme;
+    const char* port;
+  } scheme_map[] = {
+    { "http", "80" },
+    { "https", "443" },
+    { "ftp", "21" }
+  };
+  for (int i = 0; i < static_cast<int>(ARRAYSIZE_UNSAFE(scheme_map)); ++i) {
+    if (url.SchemeIs(scheme_map[i].scheme))
+      return scheme_map[i].port;
+  }
+  return std::string("");
+}
+
 }  // namespace net