Implement a parser for Content-Disposition header fields

third_party/WebKit/Source/platform/network/ContentHeaderFieldInput.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 11 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef ParsedContentType_h
-#define ParsedContentType_h
+#ifndef ContentHeaderFieldInput_h
+#define ContentHeaderFieldInput_h
 
-#include "platform/PlatformExport.h"
-#include "platform/wtf/Allocator.h"
-#include "platform/wtf/HashMap.h"
-#include "platform/wtf/text/StringHash.h"
+#include "platform/network/ParsedContentHeaderFieldParameters.h"
+#include "platform/wtf/text/WTFString.h"
 
 namespace blink {
 
-// ParsedContentType parses the constructor argument as specified in RFC2045
-// and stores the result.
-// FIXME: add support for comments.
-class PLATFORM_EXPORT ParsedContentType final {
+class ContentHeaderFieldInput final {
   STACK_ALLOCATED();
 
  public:
-  // When |Relaxed| is specified, the parser parses parameter values in a sloppy
-  // manner, i.e., only ';' and '"' are treated as special characters.
-  // See https://chromiumcodereview.appspot.com/23043002.
-  // When |Strict| is specified, the parser does not allow multiple values
-  // for the same parameter. Some RFCs based on RFC2045 (e.g. RFC6838) note that
-  // "It is an error for a specific parameter to be specified more than once."
-  enum class Mode {
-    kNormal,
-    kRelaxed,
-    kStrict,
-  };
-  explicit ParsedContentType(const String&, Mode = Mode::kNormal);
+  using Mode = ParsedContentHeaderFieldParameters::Mode;
 
-  String MimeType() const { return mime_type_; }
-  String Charset() const;
+  explicit ContentHeaderFieldInput(const String& header_field);
+  ContentHeaderFieldInput(ContentHeaderFieldInput&&);
 
-  // Note that in the case of multiple values for the same name, the last value
-  // is returned.
-  String ParameterValueForName(const String&) const;
-  size_t ParameterCount() const;
-
-  bool IsValid() const { return is_valid_; }
+  bool Consume(char);
+  bool ConsumeToken(Mode, StringView& output);
+  bool ConsumeTokenOrQuotedString(Mode, String& output);
+  unsigned Index() const { return index_; }
+  bool IsConsumed() const { return index_ >= input_.length(); }
+  void SkipSpaces();
 
  private:
-  bool Parse(const String&);
+  bool ConsumeQuotedString(String& output);
 
-  const Mode mode_;
-  bool is_valid_;
-
-  typedef HashMap<String, String> KeyValuePairs;
-  KeyValuePairs parameters_;
-  String mime_type_;
+  unsigned index_;
+  const String input_;
 };
 
 }  // namespace blink
 
 #endif