commit df41d0d839ab3ef1884b35a824179b9cd1a3c1b2
author davidben@chromium.org <davidben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> Thu Mar 13 00:43:24 2014
committer davidben@chromium.org <davidben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> Thu Mar 13 00:43:24 2014
tree 7f75bab154a66a71bc770ca3b0022ca1b5751b28
parent 69c5613f1bc410b0fcfa5e16128c388a0e579e40

Move HttpAuth::ChallengeTokenizer to its own file.

Avoids a circulate dependency in preparation of using this tokenizer to strip
private data from net-export logs.

BUG=349502

Review URL: https://codereview.chromium.org/191563004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256715 0039d316-1c4b-4281-b951-d872f2087c98

net/http/http_auth_challenge_tokenizer.cc

diff --git a/net/http/http_auth_challenge_tokenizer.cc b/net/http/http_auth_challenge_tokenizer.cc
new file mode 100644
index 0000000..528566c8
--- /dev/null
+++ b/net/http/http_auth_challenge_tokenizer.cc
@@ -0,0 +1,61 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/http/http_auth_challenge_tokenizer.h"
+
+#include "base/strings/string_tokenizer.h"
+
+namespace net {
+
+HttpAuthChallengeTokenizer::HttpAuthChallengeTokenizer(
+    std::string::const_iterator begin,
+    std::string::const_iterator end)
+    : begin_(begin),
+      end_(end),
+      scheme_begin_(begin),
+      scheme_end_(begin),
+      params_begin_(end),
+      params_end_(end) {
+  Init(begin, end);
+}
+
+HttpUtil::NameValuePairsIterator HttpAuthChallengeTokenizer::param_pairs()
+    const {
+  return HttpUtil::NameValuePairsIterator(params_begin_, params_end_, ',');
+}
+
+std::string HttpAuthChallengeTokenizer::base64_param() const {
+  // Strip off any padding.
+  // (See https://bugzilla.mozilla.org/show_bug.cgi?id=230351.)
+  //
+  // Our base64 decoder requires that the length be a multiple of 4.
+  int encoded_length = params_end_ - params_begin_;
+  while (encoded_length > 0 && encoded_length % 4 != 0 &&
+         params_begin_[encoded_length - 1] == '=') {
+    --encoded_length;
+  }
+  return std::string(params_begin_, params_begin_ + encoded_length);
+}
+
+void HttpAuthChallengeTokenizer::Init(std::string::const_iterator begin,
+                                      std::string::const_iterator end) {
+  // The first space-separated token is the auth-scheme.
+  // NOTE: we are more permissive than RFC 2617 which says auth-scheme
+  // is separated by 1*SP.
+  base::StringTokenizer tok(begin, end, HTTP_LWS);
+  if (!tok.GetNext()) {
+    // Default param and scheme iterators provide empty strings
+    return;
+  }
+
+  // Save the scheme's position.
+  scheme_begin_ = tok.token_begin();
+  scheme_end_ = tok.token_end();
+
+  params_begin_ = scheme_end_;
+  params_end_ = end;
+  HttpUtil::TrimLWS(&params_begin_, &params_end_);
+}
+
+}  // namespace net