mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 08:16:09 +03:00
68 lines
2.7 KiB
C
68 lines
2.7 KiB
C
|
// Copyright (c) 2011 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_BASE_DATA_URL_H_
|
||
|
|
#define NET_BASE_DATA_URL_H_
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
#include "net/base/net_export.h"
|
||
|
|
|
||
|
|
class GURL;
|
||
|
|
|
||
|
|
namespace net {
|
||
|
|
|
||
|
|
// See RFC 2397 for a complete description of the 'data' URL scheme.
|
||
|
|
//
|
||
|
|
// Briefly, a 'data' URL has the form:
|
||
|
|
//
|
||
|
|
// data:[<mediatype>][;base64],<data>
|
||
|
|
//
|
||
|
|
// The <mediatype> is an Internet media type specification (with optional
|
||
|
|
// parameters.) The appearance of ";base64" means that the data is encoded as
|
||
|
|
// base64. Without ";base64", the data (as a sequence of octets) is represented
|
||
|
|
// using ASCII encoding for octets inside the range of safe URL characters and
|
||
|
|
// using the standard %xx hex encoding of URLs for octets outside that range.
|
||
|
|
// If <mediatype> is omitted, it defaults to text/plain;charset=US-ASCII. As a
|
||
|
|
// shorthand, "text/plain" can be omitted but the charset parameter supplied.
|
||
|
|
//
|
||
|
|
class NET_EXPORT DataURL {
|
||
|
|
public:
|
||
|
|
// This method can be used to parse a 'data' URL into its component pieces.
|
||
|
|
//
|
||
|
|
// The resulting mime_type is normalized to lowercase. The data is the
|
||
|
|
// decoded data (e.g.., if the data URL specifies base64 encoding, then the
|
||
|
|
// returned data is base64 decoded, and any %-escaped bytes are unescaped).
|
||
|
|
//
|
||
|
|
// If the media type value doesn't match the media-type production defined in
|
||
|
|
// RFC 7231, mime_type will be set to the default value "text/plain". We
|
||
|
|
// don't simply fail for this grammar violation since Chromium had been
|
||
|
|
// accepting such invalid values. For example, <img> element with the src
|
||
|
|
// attribute set to a data URL with an invalid media type "image" (without a
|
||
|
|
// slash and subtype) had been displayed. However, the value this method will
|
||
|
|
// store in mime_type argument can be used for generating other headers, etc.
|
||
|
|
// This could lead to security vulnerability. We don't want to accept
|
||
|
|
// arbitrary value and ask each caller to validate the return value.
|
||
|
|
//
|
||
|
|
// If the charset parameter is specified but its value doesn't match the
|
||
|
|
// token production defined in RFC 7230, this method simply fails and returns
|
||
|
|
// false.
|
||
|
|
//
|
||
|
|
// If there's any other grammar violation in the URL, then this method will
|
||
|
|
// return false. Output variables may be changed and contain invalid data. On
|
||
|
|
// success, true is returned.
|
||
|
|
//
|
||
|
|
// OPTIONAL: If |data| is NULL, then the <data> section will not be parsed
|
||
|
|
// or validated.
|
||
|
|
//
|
||
|
|
static bool Parse(const GURL& url,
|
||
|
|
std::string* mime_type,
|
||
|
|
std::string* charset,
|
||
|
|
std::string* data);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace net
|
||
|
|
|
||
|
|
#endif // NET_BASE_DATA_URL_H_
|