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// 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_BASE_MIME_UTIL_H__
#define NET_BASE_MIME_UTIL_H__
// This file defines MIME utility functions. All of them assume the MIME type
// to be of the format specified by rfc2045. According to it, MIME types are
// case strongly insensitive except parameter values, which may or may not be
// case sensitive.
//
// These utilities perform a *case-sensitive* matching for parameter values,
// which may produce some false negatives. Except that, matching is
// case-insensitive.
//
// All constants in mime_util.cc must be written in lower case, except parameter
// values, which can be any case.
#include <stddef.h>
#include <string>
#include <vector>
#include "base/files/file_path.h"
#include "net/base/net_export.h"
namespace net {
// Gets the mime type (if any) that is associated with the given file extension.
// Returns true if a corresponding mime type exists.
NET_EXPORT bool GetMimeTypeFromExtension(const base::FilePath::StringType& ext,
std::string* mime_type);
// Gets the mime type (if any) that is associated with the given file extension.
// Returns true if a corresponding mime type exists. In this method,
// the search for a mime type is constrained to a limited set of
// types known to the net library, the OS/registry is not consulted.
NET_EXPORT bool GetWellKnownMimeTypeFromExtension(
const base::FilePath::StringType& ext,
std::string* mime_type);
// Gets the mime type (if any) that is associated with the given file. Returns
// true if a corresponding mime type exists.
NET_EXPORT bool GetMimeTypeFromFile(const base::FilePath& file_path,
std::string* mime_type);
// Gets the preferred extension (if any) associated with the given mime type.
// Returns true if a corresponding file extension exists. The extension is
// returned without a prefixed dot, ex "html".
NET_EXPORT bool GetPreferredExtensionForMimeType(
const std::string& mime_type,
base::FilePath::StringType* extension);
// Returns true if this the mime_type_pattern matches a given mime-type.
// Checks for absolute matching and wildcards. MIME types are case insensitive.
NET_EXPORT bool MatchesMimeType(const std::string& mime_type_pattern,
const std::string& mime_type);
// Returns true if the |type_string| is a correctly-formed mime type specifier
// with no parameter, i.e. string that matches the following ABNF (see the
// definition of content ABNF in RFC2045 and media-type ABNF httpbis p2
// semantics).
//
// token "/" token
//
// If |top_level_type| is non-NULL, sets it to parsed top-level type string.
// If |subtype| is non-NULL, sets it to parsed subtype string.
//
// This function strips leading and trailing whitespace from the MIME type.
// TODO: investigate if we should strip strictly HTTP whitespace.
NET_EXPORT bool ParseMimeTypeWithoutParameter(const std::string& type_string,
std::string* top_level_type,
std::string* subtype);
// Returns true if the |type_string| is a top-level type of any media type
// registered with IANA media types registry at
// http://www.iana.org/assignments/media-types/media-types.xhtml or an
// experimental type (type with x- prefix).
//
// This method doesn't check that the input conforms to token ABNF, so if input
// is experimental type strings, you need to check check that before using
// this method.
NET_EXPORT bool IsValidTopLevelMimeType(const std::string& type_string);
// Get the extensions associated with the given mime type.
//
// There could be multiple extensions for a given mime type, like "html,htm" for
// "text/html", or "txt,text,html,..." for "text/*". Note that we do not erase
// the existing elements in the the provided vector. Instead, we append the
// result to it. The new extensions are returned in no particular order.
NET_EXPORT void GetExtensionsForMimeType(
const std::string& mime_type,
std::vector<base::FilePath::StringType>* extensions);
// Generates a random MIME multipart boundary.
// The returned string is guaranteed to be at most 70 characters long.
NET_EXPORT std::string GenerateMimeMultipartBoundary();
// Prepares one value as part of a multi-part upload request.
NET_EXPORT void AddMultipartValueForUpload(const std::string& value_name,
const std::string& value,
const std::string& mime_boundary,
const std::string& content_type,
std::string* post_data);
// Prepares one value as part of a multi-part upload request, with file name as
// an additional parameter.
NET_EXPORT void AddMultipartValueForUploadWithFileName(
const std::string& value_name,
const std::string& file_name,
const std::string& value,
const std::string& mime_boundary,
const std::string& content_type,
std::string* post_data);
// Adds the final delimiter to a multi-part upload request.
NET_EXPORT void AddMultipartFinalDelimiterForUpload(
const std::string& mime_boundary,
std::string* post_data);
} // namespace net
#endif // NET_BASE_MIME_UTIL_H__
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