mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 00:06:09 +03:00
72 lines
3.0 KiB
C
72 lines
3.0 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_MIME_SNIFFER_H__
|
||
|
|
#define NET_BASE_MIME_SNIFFER_H__
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
#include "net/base/net_export.h"
|
||
|
|
|
||
|
|
class GURL;
|
||
|
|
|
||
|
|
namespace net {
|
||
|
|
|
||
|
|
// The maximum number of bytes used by any internal mime sniffing routine. May
|
||
|
|
// be useful for callers to determine an efficient buffer size to pass to
|
||
|
|
// |SniffMimeType|.
|
||
|
|
// This must be updated if any internal sniffing routine needs more bytes.
|
||
|
|
const int kMaxBytesToSniff = 1024;
|
||
|
|
|
||
|
|
// Examine the URL and the mime_type and decide whether we should sniff a
|
||
|
|
// replacement mime type from the content.
|
||
|
|
//
|
||
|
|
// @param url The URL from which we obtained the content.
|
||
|
|
// @param mime_type The current mime type, e.g. from the Content-Type header.
|
||
|
|
// @return Returns true if we should sniff the mime type.
|
||
|
|
NET_EXPORT bool ShouldSniffMimeType(const GURL& url,
|
||
|
|
const std::string& mime_type);
|
||
|
|
|
||
|
|
// Guess a mime type from the first few bytes of content an its URL. Always
|
||
|
|
// assigns |result| with its best guess of a mime type.
|
||
|
|
//
|
||
|
|
// @param content A buffer containing the bytes to sniff.
|
||
|
|
// @param content_size The number of bytes in the |content| buffer.
|
||
|
|
// @param url The URL from which we obtained this content.
|
||
|
|
// @param type_hint The current mime type, e.g. from the Content-Type header.
|
||
|
|
// @param result Address at which to place the sniffed mime type.
|
||
|
|
// @return Returns true if we have enough content to guess the mime type.
|
||
|
|
NET_EXPORT bool SniffMimeType(const char* content, size_t content_size,
|
||
|
|
const GURL& url, const std::string& type_hint,
|
||
|
|
std::string* result);
|
||
|
|
|
||
|
|
// Attempt to identify a MIME type from the first few bytes of content only.
|
||
|
|
// Uses a bigger set of media file searches than |SniffMimeType()|.
|
||
|
|
// If finds a match, fills in |result| and returns true,
|
||
|
|
// otherwise returns false.
|
||
|
|
//
|
||
|
|
// The caller should understand the security ramifications of trusting
|
||
|
|
// uncontrolled data before accepting the results of this function.
|
||
|
|
//
|
||
|
|
// @param content A buffer containing the bytes to sniff.
|
||
|
|
// @param content_size The number of bytes in the |content| buffer.
|
||
|
|
// @param result Address at which to place the sniffed mime type.
|
||
|
|
// @return Returns true if a MIME type match was found.
|
||
|
|
NET_EXPORT bool SniffMimeTypeFromLocalData(const char* content,
|
||
|
|
size_t content_size,
|
||
|
|
std::string* result);
|
||
|
|
|
||
|
|
// Returns true if |content| contains bytes that are control codes that do
|
||
|
|
// not usually appear in plain text.
|
||
|
|
// @param content A buffer contains bytes that may be binary.
|
||
|
|
// @param size The number of bytes in the |content| buffer.
|
||
|
|
// @return Returns true if |content| looks like binary.
|
||
|
|
NET_EXPORT_PRIVATE bool LooksLikeBinary(const char* content, size_t size);
|
||
|
|
|
||
|
|
} // namespace net
|
||
|
|
|
||
|
|
#endif // NET_BASE_MIME_SNIFFER_H__
|