Added anonymization patterns for URLs and email addresses

components/feedback/anonymizer_tool.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_FEEDBACK_ANONYMIZER_TOOL_H_
 #define COMPONENTS_FEEDBACK_ANONYMIZER_TOOL_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
-#include <base/macros.h>
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace re2 {
+class RE2;
+}
 
 namespace feedback {
 
+struct CustomPatternWithoutContext {
+  // A string literal used in anonymized tests. Matches to the |pattern| are
+  // replaced with <|alias|: 1>, <|alias|: 2>, ...
+  const char* alias;
+  // A RE2 regexp with exactly one capture group. Matches will be replaced by
+  // the alias reference described above.
+  const char* pattern;
+};
+
 class AnonymizerTool {
  public:
   AnonymizerTool();
   ~AnonymizerTool();
 
   // Returns an anonymized version of |input|. PII-sensitive data (such as MAC
   // addresses) in |input| is replaced with unique identifiers.
   std::string Anonymize(const std::string& input);
 
  private:
   friend class AnonymizerToolTest;
 
+  re2::RE2* GetRegExp(const std::string& pattern);
+
   std::string AnonymizeMACAddresses(const std::string& input);
   std::string AnonymizeCustomPatterns(std::string input);
-  static std::string AnonymizeCustomPattern(
+  std::string AnonymizeCustomPatternWithContext(
       const std::string& input,
       const std::string& pattern,
       std::map<std::string, std::string>* identifier_space);
+  std::string AnonymizeCustomPatternWithoutContext(
+      const std::string& input,
+      const CustomPatternWithoutContext& pattern,
+      std::map<std::string, std::string>* identifier_space);
 
   // Map of MAC addresses discovered in anonymized strings to anonymized
   // representations. 11:22:33:44:55:66 gets anonymized to 11:22:33:00:00:01,
   // where the first three bytes represent the manufacturer. The last three
   // bytes are used to distinguish different MAC addresses and are incremented
   // for each newly discovered MAC address.
   std::map<std::string, std::string> mac_addresses_;
 
   // Like mac addresses, identifiers in custom patterns are anonymized.
-  // custom_patterns_[i] contains a map of original identifier to anonymized
-  // identifier for custom pattern number i.
-  std::vector<std::map<std::string, std::string>> custom_patterns_;
+  // custom_patterns_with_context_[i] contains a map of original identifier to
+  // anonymized identifier for custom pattern number i.
+  std::vector<std::map<std::string, std::string>> custom_patterns_with_context_;
+  std::vector<std::map<std::string, std::string>>
+      custom_patterns_without_context_;
+
+  // Cache to prevent the repeated compilation of the same regular expression
+  // pattern. Key is the string representation of the RegEx.
+  std::map<std::string, scoped_ptr<re2::RE2>> regexp_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(AnonymizerTool);
 };
 
 }  // namespace feedback
 
 #endif  // COMPONENTS_FEEDBACK_ANONYMIZER_TOOL_H_