sc/source/core/tool/webservicelink.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   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
  10 #include <comphelper/processfactory.hxx>
  11 #include <sfx2/linkmgr.hxx>
  12 #include <sfx2/bindings.hxx>
  13
  14 #include <com/sun/star/ucb/XSimpleFileAccess3.hpp>
  15 #include <com/sun/star/ucb/SimpleFileAccess.hpp>
  16 #include <com/sun/star/io/XInputStream.hpp>
  17
  18 #include <tools/hostfilter.hxx>
  19 #include <tools/urlobj.hxx>
  20
  21 #include <utility>
  22 #include <webservicelink.hxx>
  23 #include <brdcst.hxx>
  24 #include <document.hxx>
  25 #include <sc.hrc>
  26
  27 ScWebServiceLink::ScWebServiceLink(ScDocument* pD, OUString _aURL)
  28     : ::sfx2::SvBaseLink(SfxLinkUpdateMode::ALWAYS, SotClipboardFormatId::STRING)
  29     , pDoc(pD)
  30     , aURL(std::move(_aURL))
  31     , bHasResult(false)
  32 {
  33 }
  34
  35 ScWebServiceLink::~ScWebServiceLink() {}
  36
  37 sfx2::SvBaseLink::UpdateResult ScWebServiceLink::DataChanged(const OUString&, const css::uno::Any&)
  38 {
  39     aResult.clear();
  40     bHasResult = false;
  41
  42     INetURLObject aURLObject(aURL);
  43     const OUString sHost = aURLObject.GetHost();
  44     if (HostFilter::isForbidden(sHost))
  45     {
  46         SAL_WARN("sc.ui", "ScWebServiceLink::DataChanged: blocked access to external file: \""
  47                               << aURL << "\"");
  48         return ERROR_GENERAL;
  49     }
  50
  51     css::uno::Reference<css::ucb::XSimpleFileAccess3> xFileAccess
  52         = css::ucb::SimpleFileAccess::create(comphelper::getProcessComponentContext());
  53     if (!xFileAccess.is())
  54         return ERROR_GENERAL;
  55
  56     css::uno::Reference<css::io::XInputStream> xStream;
  57     try
  58     {
  59         xStream = xFileAccess->openFileRead(aURL);
  60     }
  61     catch (...)
  62     {
  63         // don't let any exceptions pass
  64         return ERROR_GENERAL;
  65     }
  66     if (!xStream.is())
  67         return ERROR_GENERAL;
  68
  69     const sal_Int32 BUF_LEN = 8000;
  70     css::uno::Sequence<sal_Int8> buffer(BUF_LEN);
  71     OStringBuffer aBuffer(64000);
  72
  73     sal_Int32 nRead = 0;
  74     while ((nRead = xStream->readBytes(buffer, BUF_LEN)) == BUF_LEN)
  75         aBuffer.append(reinterpret_cast<const char*>(buffer.getConstArray()), nRead);
  76
  77     if (nRead > 0)
  78         aBuffer.append(reinterpret_cast<const char*>(buffer.getConstArray()), nRead);
  79
  80     xStream->closeInput();
  81
  82     aResult = OStringToOUString(aBuffer, RTL_TEXTENCODING_UTF8);
  83     bHasResult = true;
  84
  85     //  Something happened...
  86     if (HasListeners())
  87     {
  88         Broadcast(ScHint(SfxHintId::ScDataChanged, ScAddress()));
  89         pDoc->TrackFormulas(); // must happen immediately
  90         pDoc->StartTrackTimer();
  91     }
  92
  93     return SUCCESS;
  94 }
  95
  96 void ScWebServiceLink::ListenersGone()
  97 {
  98     ScDocument* pStackDoc = pDoc; // member pDoc can't be used after removing the link
  99
 100     sfx2::LinkManager* pLinkMgr = pDoc->GetLinkManager();
 101     pLinkMgr->Remove(this); // deletes this
 102
 103     if (pLinkMgr->GetLinks().empty()) // deleted the last one ?
 104     {
 105         SfxBindings* pBindings = pStackDoc->GetViewBindings(); // don't use member pDoc!
 106         if (pBindings)
 107             pBindings->Invalidate(SID_LINKS);
 108     }
 109 }
 110
 111 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */