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| -rw-r--r-- | netwerk/mime/nsIMIMEService.idl | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/netwerk/mime/nsIMIMEService.idl b/netwerk/mime/nsIMIMEService.idl new file mode 100644 index 0000000000..89cda79ee5 --- /dev/null +++ b/netwerk/mime/nsIMIMEService.idl @@ -0,0 +1,258 @@ +/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "nsISupports.idl" + +interface nsIFile; +interface nsIMIMEInfo; +interface nsIURI; +interface nsIChannel; + +%{C++ +#define NS_MIMESERVICE_CID \ +{ /* 03af31da-3109-11d3-8cd0-0060b0fc14a3 */ \ + 0x03af31da, \ + 0x3109, \ + 0x11d3, \ + {0x8c, 0xd0, 0x00, 0x60, 0xb0, 0xfc, 0x14, 0xa3} \ +} +%} + +/** + * The MIME service is responsible for mapping file extensions to MIME-types + * (see RFC 2045). It also provides access to nsIMIMEInfo interfaces and + * acts as a general convenience wrapper of nsIMIMEInfo interfaces. + * + * The MIME service maintains a database with a <b>one</b> MIME type <b>to many</b> + * file extensions rule. Adding the same file extension to multiple MIME types + * is illegal and behavior is undefined. + * + * @see nsIMIMEInfo + */ +[scriptable, main_process_scriptable_only, uuid(5b3675a1-02db-4f8f-a560-b34736635f47)] +interface nsIMIMEService : nsISupports { + /** + * Retrieves an nsIMIMEInfo using both the extension + * and the type of a file. The type is given preference + * during the lookup. One of aMIMEType and aFileExt + * can be an empty string. At least one of aMIMEType and aFileExt + * must be nonempty. + */ + nsIMIMEInfo getFromTypeAndExtension(in ACString aMIMEType, in AUTF8String aFileExt); + + /** + * Retrieves a ACString representation of the MIME type + * associated with this file extension. + * + * @param A file extension (excluding the dot ('.')). + * @return The MIME type, if any. + */ + ACString getTypeFromExtension(in AUTF8String aFileExt); + + /** + * Retrieves a ACString representation of the MIME type + * associated with this URI. The association is purely + * file extension to MIME type based. No attempt to determine + * the type via server headers or byte scanning is made. + * + * @param The URI the user wants MIME info on. + * @return The MIME type, if any. + */ + ACString getTypeFromURI(in nsIURI aURI); + + /** + * Retrieves a ACString representation of the MIME type + * associated with this file extension. Only the default + * builtin list is examined. Unless you need a restricted + * set use getTypeFromURI. + * + * @param The URI the user wants MIME info on. + * @return The MIME type, if any. + */ + ACString getDefaultTypeFromURI(in nsIURI aURI); + + // + ACString getTypeFromFile(in nsIFile aFile); + + /** + * Given a Type/Extension combination, returns the default extension + * for this type. This may be identical to the passed-in extension. + * + * @param aMIMEType The Type to get information on. Must not be empty. + * @param aFileExt File Extension. Can be empty. + */ + AUTF8String getPrimaryExtension(in ACString aMIMEType, in AUTF8String aFileExt); + + /* + * Returns an nsIMIMEInfo for the provided MIME type and extension + * obtained from an OS lookup. If no handler is found for the type and + * extension, returns a generic nsIMIMEInfo object. The MIME type and + * extension can be the empty string. When the type and extension don't + * map to the same handler, the semantics/resolution are platform + * specific. See the platform implementations for details. + * + * @param aType The MIME type to get handler information for. + * @param aFileExtension The filename extension to use either alone + * or with the MIME type to get handler information + * for. UTF-8 encoded. + * @param [out] aFound Out param indicating whether a MIMEInfo could + * be found for the provided type and/or extension. + * Set to false when neither extension nor the MIME + * type are mapped to a handler. + * @return A nsIMIMEInfo object. This function must return + * a MIMEInfo object if it can allocate one. The + * only justifiable reason for not returning one is + * an out-of-memory error. + */ + nsIMIMEInfo getMIMEInfoFromOS(in ACString aType, + in ACString aFileExtension, + out boolean aFound); + + /** + * Update the mime info's default app information based on OS + * lookups. + * Note: normally called automatically by nsIMIMEInfo. If you find + * yourself needing to call this from elsewhere, file a bug instead. + */ + void updateDefaultAppInfo(in nsIMIMEInfo aMIMEInfo); + + /** + * Default filename validation for getValidFileName and + * validateFileNameForSaving where other flags are not true. + * That is, the extension is modified to fit the content type, + * duplicate whitespace is collapsed, and long filenames are + * truncated. A valid content type must be supplied. See the + * description of getValidFileName for more details about how + * the flags are used. + */ + const long VALIDATE_DEFAULT = 0; + + /** + * If true, then the filename is only validated to ensure that it is + * acceptable for the file system. If false, then the extension is also + * checked to ensure that it is valid for the content type. If the + * extension is not valid, the filename is modified to have the proper + * extension. + */ + const long VALIDATE_SANITIZE_ONLY = 1; + + /** + * Don't collapse strings of duplicate whitespace into a single string. + */ + const long VALIDATE_DONT_COLLAPSE_WHITESPACE = 2; + + /** + * Don't truncate long filenames. + */ + const long VALIDATE_DONT_TRUNCATE = 4; + + /** + * True to ignore the content type and guess the type from any existing + * extension instead. "application/octet-stream" is used as the default + * if there is no extension or there is no information available for + * the extension. + */ + const long VALIDATE_GUESS_FROM_EXTENSION = 8; + + /** + * If the filename is empty, return the empty filename + * without modification. + */ + const long VALIDATE_ALLOW_EMPTY = 16; + + /** + * Don't apply a default filename if the non-extension portion of the + * filename is empty. + */ + const long VALIDATE_NO_DEFAULT_FILENAME = 32; + + /** + * When the filename has an invalid extension, force the the filename to + * have a valid extension appended to the end of the filename when that + * extension would normally be ignored for the given content type. This + * primarily is used when saving pages to ensure that the html extension + * is applied over any extension that might have been generated from a + * page title. + */ + const long VALIDATE_FORCE_APPEND_EXTENSION = 64; + + /** + * Don't modify filenames or extensions that might be invalid or dangerous + * on some platforms. If this flag is not used, these filenames will be + * modified so that the operating system does not treat them specially. + */ + const long VALIDATE_ALLOW_INVALID_FILENAMES = 128; + + /** + * Generate a valid filename from the channel that can be used to save + * the content of the channel to the local disk. + * + * The filename is determined from the content disposition, the filename + * of the uri, or a default filename. The following modifications are + * applied: + * - If the VALIDATE_SANITIZE_ONLY flag is not specified, then the + * extension of the filename is modified to suit the supplied content type. + * - Path separators (typically / and \) are replaced by underscores (_) + * - Characters that are not valid or would be confusing in filenames are + * replaced by spaces (*, :, etc) + * - Bidi related marks are replaced by underscores (_) + * - Whitespace and periods are removed from the beginning and end. + * - Unless VALIDATE_DONT_COLLAPSE_WHITESPACE is specified, multiple + * consecutive whitespace characters are collapsed to a single space + * character, either ' ' or an ideographic space 0x3000 if present. + * - Unless VALIDATE_DONT_TRUNCATE is specified, the filename is truncated + * to a maximum length, preserving the extension if possible. + * - Some filenames and extensions are invalid on certain platforms. + * These are replaced if possible unless VALIDATE_ALLOW_INVALID_FILENAMES + * is specified. + * + * If the VALIDATE_NO_DEFAULT_FILENAME flag is not specified, and after the + * rules above are applied, the resulting filename is empty, a default + * filename is used. + * + * If the VALIDATE_ALLOW_EMPTY flag is specified, an empty string may be + * returned only if the filename could not be determined or was blank. + * + * If either the VALIDATE_SANITIZE_ONLY or VALIDATE_GUESS_FROM_EXTENSION flags + * are specified, then the content type may be empty. Otherwise, the type must + * not be empty. + * + * The aOriginalURI would be specified if the channel is for a local file but + * it was originally sourced from a different uri. + * + * When saving an image, use validateFileNameForSaving instead and + * pass the result of imgIRequest::GetFileName() as the filename to + * check. + * + * @param aChannel The channel of the content to save. + * @param aType The MIME type to use, which would usually be the + * same as the content type of the channel. + * @param aOriginalURL the source url of the file, but may be null. + * @param aFlags one or more of the flags above. + * @returns The resulting filename. + */ + AString getValidFileName(in nsIChannel aChannel, + in ACString aType, + in nsIURI aOriginalURI, + in unsigned long aFlags); + + /** + * Similar to getValidFileName, but used when a specific filename needs + * to be validated. The filename is modified as needed based on the + * content type in the same manner as getValidFileName. + * + * If the filename came from a uri, it should not be escaped, that is, + * any needed unescaping of the filename should happen before calling + * this method. + * + * @param aType The MIME type to use. + * @param aFlags one or more of the flags above. + * @param aFileName The filename to validate. + * @returns The validated filename. + */ + AString validateFileNameForSaving(in AString aFileName, + in ACString aType, + in unsigned long aFlags); +}; |