Make sure that HttpRequestHeaders contains valid key-value pairs.

net/http/http_util.h

 // Copyright (c) 2012 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 NET_HTTP_HTTP_UTIL_H_
 #define NET_HTTP_HTTP_UTIL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 57 matching lines @@
 
   // Scans the '\r\n'-delimited headers for the given header name.  Returns
   // true if a match is found.  Input is assumed to be well-formed.
   // TODO(darin): kill this
   static bool HasHeader(const std::string& headers, const char* name);
 
   // Returns true if it is safe to allow users and scripts to specify the header
   // named |name|.
   static bool IsSafeHeader(const std::string& name);
 
+  // Returns true if |name| is a valid HTTP header name.
+  static bool IsValidHeaderName(const std::string& name);
+
+  // Returns true if |value| is a valid HTTP header value.

[mmenke, 2014/08/25 16:32:44]

This isn't accurate.  It doesn't do a full validation (For example, it doesn't
check for control characters).

Maybe "Returns false if |value| contains vertical white space or NULs.  Does not
do a full validity check."

[robwu, 2014/08/25 18:58:29]

Done.

+  static bool IsValidHeaderValue(const std::string& value);
+
   // Strips all header lines from |headers| whose name matches
   // |headers_to_remove|. |headers_to_remove| is a list of null-terminated
   // lower-case header names, with array length |headers_to_remove_len|.
   // Returns the stripped header lines list, separated by "\r\n".
   static std::string StripHeaders(const std::string& headers,
                                   const char* const headers_to_remove[],
                                   size_t headers_to_remove_len);
 
   // Multiple occurances of some headers cannot be coalesced into a comma-
   // separated list since their values are (or contain) unquoted HTTP-date
@@ skipping 262 matching lines @@
     // into the original's unquoted_value_ member.
     std::string unquoted_value_;
 
     bool value_is_quoted_;
   };
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_UTIL_H_