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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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+/* -*- Mode: C++; tab-width: 2; 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 nsIURI;
+interface nsIPrefBranch;
+
+/**
+ * nsINetUtil provides various network-related utility methods.
+ */
+[scriptable, uuid(fe2625ec-b884-4df1-b39c-9e830e47aa94)]
+interface nsINetUtil : nsISupports
+{
+ /**
+ * Parse a Content-Type header value in strict mode. This is a more
+ * conservative parser that reject things that violate RFC 7231 section
+ * 3.1.1.1. This is typically useful for parsing Content-Type header values
+ * that are used for HTTP requests, and those that are used to make security
+ * decisions.
+ *
+ * @param aTypeHeader the header string to parse
+ * @param [out] aCharset the charset parameter specified in the
+ * header, if any.
+ * @param [out] aHadCharset whether a charset was explicitly specified.
+ * @return the MIME type specified in the header, in lower-case.
+ */
+ AUTF8String parseRequestContentType(in AUTF8String aTypeHeader,
+ out AUTF8String aCharset,
+ out boolean aHadCharset);
+
+ /**
+ * Parse a Content-Type header value in relaxed mode. This is a more
+ * permissive parser that ignores things that go against RFC 7231 section
+ * 3.1.1.1. This is typically useful for parsing Content-Type header values
+ * received from web servers where we want to make a best effort attempt
+ * at extracting a useful MIME type and charset.
+ *
+ * NOTE: DO NOT USE THIS if you're going to make security decisions
+ * based on the result.
+ *
+ * @param aTypeHeader the header string to parse
+ * @param [out] aCharset the charset parameter specified in the
+ * header, if any.
+ * @param [out] aHadCharset whether a charset was explicitly specified.
+ * @return the MIME type specified in the header, in lower-case.
+ */
+ AUTF8String parseResponseContentType(in AUTF8String aTypeHeader,
+ out AUTF8String aCharset,
+ out boolean aHadCharset);
+
+ /**
+ * Test whether the given URI's handler has the given protocol flags.
+ *
+ * @param aURI the URI in question
+ * @param aFlags the flags we're testing for.
+ *
+ * @return whether the protocol handler for aURI has all the flags
+ * in aFlags.
+ */
+ boolean protocolHasFlags(in nsIURI aURI, in unsigned long aFlag);
+
+ /**
+ * Test whether the protocol handler for this URI or that for any of
+ * its inner URIs has the given protocol flags. This will QI aURI to
+ * nsINestedURI and walk the nested URI chain.
+ *
+ * @param aURI the URI in question
+ * @param aFlags the flags we're testing for.
+ *
+ * @return whether any of the protocol handlers involved have all the flags
+ * in aFlags.
+ */
+ boolean URIChainHasFlags(in nsIURI aURI, in unsigned long aFlags);
+
+ /**
+ * Take aURI and produce an immutable version of it for the caller. If aURI
+ * is immutable this will be aURI itself; otherwise this will be a clone,
+ * marked immutable if possible. Passing null to this method is allowed; in
+ * that case it will return null.
+ */
+ nsIURI toImmutableURI(in nsIURI aURI);
+
+ /**
+ * Create a simple nested URI using the result of
+ * toImmutableURI on the passed-in aURI which may not be null.
+ * Note: The return URI will not have had its spec set yet.
+ */
+ nsIURI newSimpleNestedURI(in nsIURI aURI);
+
+ /** Escape every character with its %XX-escaped equivalent */
+ const unsigned long ESCAPE_ALL = 0;
+
+ /** Leave alphanumeric characters intact and %XX-escape all others */
+ const unsigned long ESCAPE_XALPHAS = 1;
+
+ /** Leave alphanumeric characters intact, convert spaces to '+',
+ %XX-escape all others */
+ const unsigned long ESCAPE_XPALPHAS = 2;
+
+ /** Leave alphanumeric characters and forward slashes intact,
+ %XX-escape all others */
+ const unsigned long ESCAPE_URL_PATH = 4;
+
+ /**
+ * escape a string with %00-style escaping
+ */
+ ACString escapeString(in ACString aString, in unsigned long aEscapeType);
+
+ /** %XX-escape URL scheme */
+ const unsigned long ESCAPE_URL_SCHEME = 1;
+
+ /** %XX-escape username in the URL */
+ const unsigned long ESCAPE_URL_USERNAME = 1 << 1;
+
+ /** %XX-escape password in the URL */
+ const unsigned long ESCAPE_URL_PASSWORD = 1 << 2;
+
+ /** %XX-escape URL host */
+ const unsigned long ESCAPE_URL_HOST = 1 << 3;
+
+ /** %XX-escape URL directory */
+ const unsigned long ESCAPE_URL_DIRECTORY = 1 << 4;
+
+ /** %XX-escape file basename in the URL */
+ const unsigned long ESCAPE_URL_FILE_BASENAME = 1 << 5;
+
+ /** %XX-escape file extension in the URL */
+ const unsigned long ESCAPE_URL_FILE_EXTENSION = 1 << 6;
+
+ /** %XX-escape URL parameters */
+ const unsigned long ESCAPE_URL_PARAM = 1 << 7;
+
+ /** %XX-escape URL query */
+ const unsigned long ESCAPE_URL_QUERY = 1 << 8;
+
+ /** %XX-escape URL ref */
+ const unsigned long ESCAPE_URL_REF = 1 << 9;
+
+ /** %XX-escape URL path - same as escaping directory, basename and extension */
+ const unsigned long ESCAPE_URL_FILEPATH =
+ ESCAPE_URL_DIRECTORY | ESCAPE_URL_FILE_BASENAME | ESCAPE_URL_FILE_EXTENSION;
+
+ /** %XX-escape scheme, username, password, host, path, params, query and ref */
+ const unsigned long ESCAPE_URL_MINIMAL =
+ ESCAPE_URL_SCHEME | ESCAPE_URL_USERNAME | ESCAPE_URL_PASSWORD |
+ ESCAPE_URL_HOST | ESCAPE_URL_FILEPATH | ESCAPE_URL_PARAM |
+ ESCAPE_URL_QUERY | ESCAPE_URL_REF;
+
+ /** Force %XX-escaping of already escaped sequences */
+ const unsigned long ESCAPE_URL_FORCED = 1 << 10;
+
+ /** Skip non-ascii octets, %XX-escape all others */
+ const unsigned long ESCAPE_URL_ONLY_ASCII = 1 << 11;
+
+ /**
+ * Skip graphic octets (0x20-0x7E) when escaping
+ * Skips all ASCII octets (0x00-0x7F) when unescaping
+ */
+ const unsigned long ESCAPE_URL_ONLY_NONASCII = 1 << 12;
+
+ /** Force %XX-escape of colon */
+ const unsigned long ESCAPE_URL_COLON = 1 << 14;
+
+ /** Skip C0 and DEL from unescaping */
+ const unsigned long ESCAPE_URL_SKIP_CONTROL = 1 << 15;
+
+ /**
+ * %XX-Escape invalid chars in a URL segment.
+ *
+ * @param aStr the URL to be escaped
+ * @param aFlags the URL segment type flags
+ *
+ * @return the escaped string (the string itself if escaping did not happen)
+ *
+ */
+ ACString escapeURL(in ACString aStr, in unsigned long aFlags);
+
+ /**
+ * Expands URL escape sequences
+ *
+ * @param aStr the URL to be unescaped
+ * @param aFlags only ESCAPE_URL_ONLY_NONASCII and ESCAPE_URL_SKIP_CONTROL
+ * are recognized. If |aFlags| is 0 all escape sequences are
+ * unescaped
+ * @return unescaped string
+ */
+ ACString unescapeString(in AUTF8String aStr, in unsigned long aFlags);
+
+ /**
+ * Extract the charset parameter location and value from a content-type
+ * header.
+ *
+ * @param aTypeHeader the header string to parse
+ * @param [out] aCharset the charset parameter specified in the
+ * header, if any.
+ * @param [out] aCharsetStart index of the start of the charset parameter
+ * (the ';' separating it from what came before) in aTypeHeader.
+ * If this function returns false, this argument will still be
+ * set, to the index of the location where a new charset should
+ * be inserted.
+ * @param [out] aCharsetEnd index of the end of the charset parameter (the
+ * ';' separating it from what comes after, or the end
+ * of the string) in aTypeHeader. If this function returns
+ * false, this argument will still be set, to the index of the
+ * location where a new charset should be inserted.
+ *
+ * @return whether a charset parameter was found. This can be false even in
+ * cases when parseContentType would claim to have a charset, if the type
+ * that won out does not have a charset parameter specified.
+ */
+ boolean extractCharsetFromContentType(in AUTF8String aTypeHeader,
+ out AUTF8String aCharset,
+ out long aCharsetStart,
+ out long aCharsetEnd);
+
+/**
+ * Parse an attribute referrer policy string (no-referrer, origin, unsafe-url)
+ * and return the according integer code (defined in nsIHttpChannel.idl)
+ *
+ * @param aPolicyString
+ * the policy string given as attribute
+ * @return aPolicyEnum
+ * referrer policy code from nsIHttpChannel.idl, (see parser in
+ * ReferrerPolicy.h for details)
+ */
+ unsigned long parseAttributePolicyString(in AString aPolicyString);
+};