stoc/source/uriproc/ExternalUriReferenceTranslator.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <string_view>
  23
  24 #include <com/sun/star/lang/XServiceInfo.hpp>
  25 #include <com/sun/star/uno/Sequence.hxx>
  26 #include <com/sun/star/uri/XExternalUriReferenceTranslator.hpp>
  27 #include <cppuhelper/implbase.hxx>
  28 #include <cppuhelper/supportsservice.hxx>
  29 #include <cppuhelper/weak.hxx>
  30 #include <osl/thread.h>
  31 #include <rtl/string.h>
  32 #include <rtl/textenc.h>
  33 #include <rtl/uri.h>
  34 #include <rtl/uri.hxx>
  35 #include <rtl/ustrbuf.hxx>
  36 #include <rtl/ustring.hxx>
  37 #include <sal/types.h>
  38
  39 namespace com::sun::star::uno { class XInterface; }
  40 namespace com::sun::star::uno { class XComponentContext; }
  41
  42 namespace {
  43
  44 class Translator:
  45     public cppu::WeakImplHelper<
  46         css::lang::XServiceInfo, css::uri::XExternalUriReferenceTranslator>
  47 {
  48 public:
  49     Translator() {}
  50
  51     Translator(const Translator&) = delete;
  52     Translator& operator=(const Translator&) = delete;
  53
  54     virtual OUString SAL_CALL getImplementationName() override;
  55
  56     virtual sal_Bool SAL_CALL supportsService(OUString const & serviceName) override;
  57
  58     virtual css::uno::Sequence< OUString > SAL_CALL
  59     getSupportedServiceNames() override;
  60
  61     virtual OUString SAL_CALL
  62     translateToInternal(OUString const & externalUriReference) override;
  63
  64     virtual OUString SAL_CALL
  65     translateToExternal(OUString const & internalUriReference) override;
  66
  67 private:
  68     virtual ~Translator() override {}
  69 };
  70
  71 OUString Translator::getImplementationName()
  72 {
  73     return "com.sun.star.comp.uri.ExternalUriReferenceTranslator";
  74 }
  75
  76 sal_Bool Translator::supportsService(OUString const & serviceName)
  77 {
  78     return cppu::supportsService(this, serviceName);
  79 }
  80
  81 css::uno::Sequence< OUString > Translator::getSupportedServiceNames()
  82 {
  83     css::uno::Sequence< OUString > s { "com.sun.star.uri.ExternalUriReferenceTranslator" };
  84     return s;
  85 }
  86
  87 OUString Translator::translateToInternal(
  88     OUString const & externalUriReference)
  89 {
  90     if (!externalUriReference.matchIgnoreAsciiCase("file:/"))
  91     {
  92         return externalUriReference;
  93     }
  94     sal_Int32 i = RTL_CONSTASCII_LENGTH("file:");
  95     OUStringBuffer buf(128);
  96     buf.append(std::u16string_view(externalUriReference).substr(0, i));
  97     // Some environments (e.g., Java) produce illegal file URLs without an
  98     // authority part; treat them as having an empty authority part:
  99     if (!externalUriReference.match("//", i))
 100     {
 101         buf.append("//");
 102     }
 103     rtl_TextEncoding encoding = osl_getThreadTextEncoding();
 104     for (bool path = true;;) {
 105         sal_Int32 j = i;
 106         while (j != externalUriReference.getLength()
 107                && externalUriReference[j] != '#'
 108                && (!path || externalUriReference[j] != '/'))
 109         {
 110             ++j;
 111         }
 112         if (j != i) {
 113             OUString seg(
 114                 rtl::Uri::encode(
 115                     rtl::Uri::decode(
 116                         externalUriReference.copy(i, j - i),
 117                         rtl_UriDecodeStrict, encoding),
 118                     rtl_UriCharClassPchar, rtl_UriEncodeStrict,
 119                     RTL_TEXTENCODING_UTF8));
 120             if (seg.isEmpty()) {
 121                 return OUString();
 122             }
 123             buf.append(seg);
 124         }
 125         if (j == externalUriReference.getLength()) {
 126             break;
 127         }
 128         buf.append(externalUriReference[j]);
 129         path = externalUriReference[j] == '/';
 130         i = j + 1;
 131     }
 132     return buf.makeStringAndClear();
 133 }
 134
 135 OUString Translator::translateToExternal(
 136     OUString const & internalUriReference)
 137 {
 138     if (!internalUriReference.matchIgnoreAsciiCase("file://"))
 139     {
 140         return internalUriReference;
 141     }
 142     sal_Int32 i = RTL_CONSTASCII_LENGTH("file://");
 143     OUStringBuffer buf(128);
 144     buf.append(std::u16string_view(internalUriReference).substr(0, i));
 145     rtl_TextEncoding encoding = osl_getThreadTextEncoding();
 146     for (bool path = true;;) {
 147         sal_Int32 j = i;
 148         while (j != internalUriReference.getLength()
 149                && internalUriReference[j] != '#'
 150                && (!path || internalUriReference[j] != '/'))
 151         {
 152             ++j;
 153         }
 154         if (j != i) {
 155             // Use rtl_UriDecodeToIuri -> rtl_UriEncodeStrictKeepEscapes instead
 156             // of rtl_UriDecodeStrict -> rtl_UriEncodeStrict, so that spurious
 157             // non--UTF-8 octets like "%FE" are copied verbatim:
 158             OUString seg(
 159                 rtl::Uri::encode(
 160                     rtl::Uri::decode(
 161                         internalUriReference.copy(i, j - i),
 162                         rtl_UriDecodeToIuri, RTL_TEXTENCODING_UTF8),
 163                     rtl_UriCharClassPchar, rtl_UriEncodeStrictKeepEscapes,
 164                     encoding));
 165             if (seg.isEmpty()) {
 166                 return OUString();
 167             }
 168             buf.append(seg);
 169         }
 170         if (j == internalUriReference.getLength()) {
 171             break;
 172         }
 173         buf.append(internalUriReference[j]);
 174         path = internalUriReference[j] == '/';
 175         i = j + 1;
 176     }
 177     return buf.makeStringAndClear();
 178 }
 179
 180 }
 181
 182 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
 183 com_sun_star_comp_uri_ExternalUriReferenceTranslator_get_implementation(css::uno::XComponentContext* ,
 184         css::uno::Sequence<css::uno::Any> const &)
 185 {
 186     return ::cppu::acquire(new Translator);
 187 }
 188
 189 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */