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gecko-dev/uriloader/exthandler/nsExternalHelperAppService.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim:expandtab:shiftwidth=2:tabstop=2:
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Mozilla browser.
*
* The Initial Developer of the Original Code is Netscape
* Communications, Inc. Portions created by Netscape are
* Copyright (C) 1999, Mozilla. All Rights Reserved.
*
* Contributor(s):
* Scott MacGregor <mscott@netscape.com>
* Bill Law <law@netscape.com>
* Christian Biesinger <cbiesinger@web.de>
*/
#include "nsExternalHelperAppService.h"
#include "nsIURI.h"
#include "nsIURL.h"
#include "nsIFile.h"
#include "nsIFileURL.h"
#include "nsIChannel.h"
#include "nsIDirectoryService.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsIStringEnumerator.h"
#include "nsMemory.h"
#include "nsIStreamListener.h"
#include "nsIMIMEService.h"
#include "nsILoadGroup.h"
#include "nsCURILoader.h"
#include "nsIWebProgress.h"
#include "nsIWebProgressListener.h"
#include "nsIDownload.h"
#include "nsReadableUtils.h"
#include "nsIRequest.h"
// used to manage our in memory data source of helper applications
#include "nsRDFCID.h"
#include "rdf.h"
#include "nsIRDFService.h"
#include "nsIRDFRemoteDataSource.h"
#include "nsHelperAppRDF.h"
#include "nsIMIMEInfo.h"
#include "nsDirectoryServiceDefs.h"
#include "nsIRefreshURI.h"
#include "nsIDocumentLoader.h"
#include "nsIHelperAppLauncherDialog.h"
#include "nsNetUtil.h"
#include "nsIIOService.h"
#include "nsNetCID.h"
#include "nsMimeTypes.h"
// used for header disposition information.
#include "nsIHttpChannel.h"
#include "nsIEncodedChannel.h"
#include "nsIMultiPartChannel.h"
#include "nsIAtom.h"
#include "nsIObserverService.h" // so we can be a profile change observer
#if defined(XP_MAC) || defined (XP_MACOSX)
#include "nsILocalFileMac.h"
#include "nsIInternetConfigService.h"
#include "nsIAppleFileDecoder.h"
#endif // defined(XP_MAC) || defined (XP_MACOSX)
#include "nsIPluginHost.h"
#include "nsEscape.h"
#include "nsIStringBundle.h"
#include "nsIPromptService.h"
#include "nsIDOMWindow.h"
#include "nsITextToSubURI.h"
#include "nsIMIMEHeaderParam.h"
#include "nsIPrefService.h"
#include "nsIGlobalHistory.h"
#include "nsCRT.h"
#include "plstr.h"
#ifdef PR_LOGGING
PRLogModuleInfo* nsExternalHelperAppService::mLog = nsnull;
#endif
// Using level 3 here because the OSHelperAppServices use a log level
// of PR_LOG_DEBUG (4), and we want less detailed output here
// Using 3 instead of PR_LOG_WARN because we don't output warnings
#define LOG(args) PR_LOG(mLog, 3, args)
#define LOG_ENABLED() PR_LOG_TEST(mLog, 3)
static const char NEVER_ASK_PREF_BRANCH[] = "browser.helperApps.neverAsk.";
static const char NEVER_ASK_FOR_SAVE_TO_DISK_PREF[] = "saveToDisk";
static const char NEVER_ASK_FOR_OPEN_FILE_PREF[] = "openFile";
static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
static NS_DEFINE_CID(kPluginManagerCID, NS_PLUGINMANAGER_CID);
// Helper functions for Content-Disposition headers
/** Gets the content-disposition header from a channel, using nsIHttpChannel
* or nsIMultipartChannel if available
* @param aChannel The channel to extract the disposition header from
* @param aDisposition Reference to a string where the header is to be stored
*/
static void ExtractDisposition(nsIChannel* aChannel, nsACString& aDisposition)
{
aDisposition.Truncate();
// First see whether this is an http channel
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(aChannel));
if (httpChannel)
{
httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("content-disposition"), aDisposition);
}
if (aDisposition.IsEmpty())
{
nsCOMPtr<nsIMultiPartChannel> multipartChannel(do_QueryInterface(aChannel));
if (multipartChannel)
{
multipartChannel->GetContentDisposition(aDisposition);
}
}
}
/** Extracts the filename out of a content-disposition header
* @param aFilename [out] The filename. Can be empty on error.
* @param aDisposition Value of a Content-Disposition header
* @param aURI Optional. Will be used to get a fallback charset for the
* filename, if it is QI'able to nsIURL
* @param aMIMEHeaderParam Optional. Pointer to a nsIMIMEHeaderParam class, so
* that it doesn't need to be fetched by this function.
*/
static void GetFilenameFromDisposition(nsAString& aFilename,
const nsACString& aDisposition,
nsIURI* aURI = nsnull,
nsIMIMEHeaderParam* aMIMEHeaderParam = nsnull)
{
aFilename.Truncate();
nsCOMPtr<nsIMIMEHeaderParam> mimehdrpar(aMIMEHeaderParam);
if (!mimehdrpar) {
mimehdrpar = do_GetService(NS_MIMEHEADERPARAM_CONTRACTID);
if (!mimehdrpar)
return;
}
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
nsCAutoString fallbackCharset;
if (url)
url->GetOriginCharset(fallbackCharset);
// Get the value of 'filename' parameter
nsresult rv = mimehdrpar->GetParameter(aDisposition, "filename", fallbackCharset,
PR_TRUE, nsnull, aFilename);
if (NS_FAILED(rv) || aFilename.IsEmpty())
// Try 'name' parameter, instead.
rv = mimehdrpar->GetParameter(aDisposition, "name", fallbackCharset, PR_TRUE,
nsnull, aFilename);
}
/**
* Given a channel, returns the filename and extension the channel has.
* This uses the URL and other sources (nsIMultiPartChannel).
* Also gives back whether the channel requested external handling (i.e.
* whether Content-Disposition: attachment was sent)
* @param aChannel The channel to extract the filename/extension from
* @param aFileName [out] Reference to the string where the filename should be
* stored. Empty if it could not be retrieved.
* WARNING - this filename may contain characters which the OS does not
* allow as part of filenames!
* @param aExtension [out] Reference to the string where the extension should
* be stored. Empty if it could not be retrieved.
* @param aAllowURLExtension (optional) Get the extension from the URL if no
* Content-Disposition header is present. Default is true.
* @retval true The server sent Content-Disposition:attachment or equivalent
* @retval false Content-Disposition: inline or no content-disposition header
* was sent.
*/
static PRBool GetFilenameAndExtensionFromChannel(nsIChannel* aChannel,
nsAString& aFileName,
nsACString& aExtension,
PRBool aAllowURLExtension = PR_TRUE)
{
/*
* If the channel is an http or part of a multipart channel and we
* have a content disposition header set, then use the file name
* suggested there as the preferred file name to SUGGEST to the
* user. we shouldn't actually use that without their
* permission... otherwise just use our temp file
*/
nsCAutoString disp;
ExtractDisposition(aChannel, disp);
PRBool handleExternally = PR_FALSE;
nsCOMPtr<nsIURI> uri;
nsresult rv;
aChannel->GetURI(getter_AddRefs(uri));
// content-disposition: has format:
// disposition-type < ; name=value >* < ; filename=value > < ; name=value >*
if (!disp.IsEmpty())
{
nsCOMPtr<nsIMIMEHeaderParam> mimehdrpar = do_GetService(NS_MIMEHEADERPARAM_CONTRACTID, &rv);
if (NS_FAILED(rv))
return PR_FALSE;
nsAutoString dispToken;
// Get the disposition type
rv = mimehdrpar->GetParameter(disp, "", NS_LITERAL_CSTRING(""), PR_FALSE,
nsnull, dispToken);
// RFC 2183, section 2.8 says that an unknown disposition
// value should be treated as "attachment"
if (NS_FAILED(rv) ||
(!dispToken.EqualsIgnoreCase("inline") &&
// Broken sites just send
// Content-Disposition: filename="file"
// without a disposition token... screen those out.
!dispToken.EqualsIgnoreCase("filename", 8)))
{
// We have a content-disposition of "attachment" or unknown
handleExternally = PR_TRUE;
}
// We may not have a disposition type listed; some servers suck.
// But they could have listed a filename anyway.
GetFilenameFromDisposition(aFileName, disp, uri, mimehdrpar);
// Extract Extension, if we have a filename; otherwise,
// truncate the string
if (aFileName.IsEmpty())
{
aExtension.Truncate();
}
else
{
// XXX RFindCharInReadable!!
nsAutoString fileNameStr(aFileName);
PRInt32 idx = fileNameStr.RFindChar(PRUnichar('.'));
if (idx != kNotFound)
CopyUTF16toUTF8(StringTail(fileNameStr, fileNameStr.Length() - idx - 1), aExtension);
}
} // we had a disp header
// If the disposition header didn't work, try the filename from nsIURL
nsCOMPtr<nsIURL> url(do_QueryInterface(uri));
if (url && aFileName.IsEmpty())
{
if (aAllowURLExtension)
url->GetFileExtension(aExtension);
// try to extract the file name from the url and use that as a first pass as the
// leaf name of our temp file...
nsCAutoString leafName; // may be shortened by NS_UnescapeURL
url->GetFileName(leafName);
if (!leafName.IsEmpty())
{
nsCOMPtr<nsITextToSubURI> textToSubURI = do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv))
{
nsCAutoString originCharset;
url->GetOriginCharset(originCharset);
rv = textToSubURI->UnEscapeURIForUI(originCharset, leafName,
aFileName);
}
if (NS_FAILED(rv))
{
CopyUTF8toUTF16(leafName, aFileName); // use escaped name
}
}
}
return handleExternally;
}
/**
* Structure for storing extension->type mappings.
* @see defaultMimeEntries
*/
struct nsDefaultMimeTypeEntry {
const char* mMimeType;
const char* mFileExtension;
};
/**
* Default extension->mimetype mappings. These are not overridable.
*/
static nsDefaultMimeTypeEntry defaultMimeEntries [] =
{
// The following are those extensions that we're asked about during startup,
// sorted by order used
{ IMAGE_GIF, "gif" },
{ TEXT_XML, "xml" },
{ TEXT_RDF, "rdf" },
{ TEXT_XUL, "xul" },
{ IMAGE_PNG, "png" },
// -- end extensions used during startup
{ TEXT_CSS, "css" },
{ IMAGE_JPG, "jpeg" },
{ IMAGE_JPG, "jpg" },
{ TEXT_HTML, "html" },
{ TEXT_HTML, "htm" },
{ APPLICATION_XPINSTALL, "xpi" },
{ "application/xhtml+xml", "xhtml" },
{ "application/xhtml+xml", "xht" }
};
/**
* This is a small private struct used to help us initialize some
* default mime types.
*/
struct nsExtraMimeTypeEntry {
const char* mMimeType;
const char* mFileExtensions;
const char* mDescription;
PRUint32 mMactype;
PRUint32 mMacCreator;
};
#if defined(XP_MACOSX) || defined(XP_MAC)
#define MAC_TYPE(x) x
#else
#define MAC_TYPE(x) 0
#endif
/**
* This table lists all of the 'extra" content types that we can deduce from particular
* file extensions. These entries also ensure that we provide a good descriptive name
* when we encounter files with these content types and/or extensions. These can be
* overridden by user helper app prefs.
*/
static nsExtraMimeTypeEntry extraMimeEntries [] =
{
#if defined(VMS)
{ APPLICATION_OCTET_STREAM, "exe,bin,sav,bck,pcsi,dcx_axpexe,dcx_vaxexe,sfx_axpexe,sfx_vaxexe", "Binary Executable", 0, 0 },
#elif defined(XP_MAC) || defined (XP_MACOSX)// don't define .bin on the mac...use internet config to look that up...
{ APPLICATION_OCTET_STREAM, "exe", "Binary Executable", 0, 0 },
#else
{ APPLICATION_OCTET_STREAM, "exe,bin", "Binary Executable", 0, 0 },
#endif
{ APPLICATION_GZIP2, "gz", "gzip", 0, 0 },
{ "application/x-arj", "arj", "ARJ file", 0,0 },
{ APPLICATION_XPINSTALL, "xpi", "XPInstall Install", MAC_TYPE('xpi*'), MAC_TYPE('MOSS') },
{ APPLICATION_POSTSCRIPT, "ps,eps,ai", "Postscript File", 0, 0 },
{ APPLICATION_JAVASCRIPT, "js", "Javascript Source File", MAC_TYPE('TEXT'), MAC_TYPE('ttxt') },
{ IMAGE_ART, "art", "ART Image", 0, 0 },
{ IMAGE_BMP, "bmp", "BMP Image", 0, 0 },
{ IMAGE_GIF, "gif", "GIF Image", 0,0 },
{ IMAGE_ICO, "ico,cur", "ICO Image", 0, 0 },
{ IMAGE_JPG, "jpeg,jpg,jfif,pjpeg,pjp", "JPEG Image", 0, 0 },
{ IMAGE_PNG, "png", "PNG Image", 0, 0 },
{ IMAGE_TIFF, "tiff,tif", "TIFF Image", 0, 0 },
{ IMAGE_XBM, "xbm", "XBM Image", 0, 0 },
{ "image/svg+xml", "svg", "Scalable Vector Graphics", MAC_TYPE('svg '), MAC_TYPE('ttxt') },
{ MESSAGE_RFC822, "eml", "RFC-822 data", MAC_TYPE('TEXT'), MAC_TYPE('MOSS') },
{ TEXT_PLAIN, "txt,text", "Text File", MAC_TYPE('TEXT'), MAC_TYPE('ttxt') },
{ TEXT_HTML, "html,htm,shtml,ehtml", "HyperText Markup Language", MAC_TYPE('TEXT'), MAC_TYPE('MOSS') },
{ "application/xhtml+xml", "xhtml,xht", "Extensible HyperText Markup Language", MAC_TYPE('TEXT'), MAC_TYPE('ttxt') },
{ TEXT_RDF, "rdf", "Resource Description Framework", MAC_TYPE('TEXT'), MAC_TYPE('ttxt') },
{ TEXT_XUL, "xul", "XML-Based User Interface Language", MAC_TYPE('TEXT'), MAC_TYPE('ttxt') },
{ TEXT_XML, "xml,xsl,xbl", "Extensible Markup Language", MAC_TYPE('TEXT'), MAC_TYPE('ttxt') },
{ TEXT_CSS, "css", "Style Sheet", MAC_TYPE('TEXT'), MAC_TYPE('ttxt') },
};
#undef MAC_TYPE
/**
* File extensions for which decoding should be disabled.
*/
static nsDefaultMimeTypeEntry nonDecodableExtensions [] = {
{ APPLICATION_GZIP, "gz" },
{ APPLICATION_GZIP, "tgz" },
{ APPLICATION_ZIP, "zip" },
{ APPLICATION_COMPRESS, "Z" }
};
NS_IMPL_THREADSAFE_ISUPPORTS6(
nsExternalHelperAppService,
nsIExternalHelperAppService,
nsPIExternalAppLauncher,
nsIExternalProtocolService,
nsIMIMEService,
nsIObserver,
nsISupportsWeakReference)
nsExternalHelperAppService::nsExternalHelperAppService()
: mDataSourceInitialized(PR_FALSE)
{
}
nsresult nsExternalHelperAppService::Init()
{
// Add an observer for profile change
nsresult rv = NS_OK;
nsCOMPtr<nsIObserverService> obs = do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef PR_LOGGING
if (!mLog) {
mLog = PR_NewLogModule("HelperAppService");
if (!mLog)
return NS_ERROR_OUT_OF_MEMORY;
}
#endif
return obs->AddObserver(this, "profile-before-change", PR_TRUE);
}
nsExternalHelperAppService::~nsExternalHelperAppService()
{
}
nsresult nsExternalHelperAppService::InitDataSource()
{
nsresult rv = NS_OK;
// don't re-initialize the data source if we've already done so...
if (mDataSourceInitialized)
return NS_OK;
nsCOMPtr<nsIRDFService> rdf = do_GetService(kRDFServiceCID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// Get URI of the mimeTypes.rdf data source. Do this the same way it's done in
// pref-applications-edit.xul, for example, to ensure we get the same data source!
// Note that the way it was done previously (using nsIFileSpec) worked better, but it
// produced a different uri (it had "file:///C|" instead of "file:///C:". What can you do?
nsCOMPtr<nsIFile> mimeTypesFile;
rv = NS_GetSpecialDirectory(NS_APP_USER_MIMETYPES_50_FILE, getter_AddRefs(mimeTypesFile));
NS_ENSURE_SUCCESS(rv, rv);
// Get file url spec to be used to initialize the DS.
nsCAutoString urlSpec;
rv = NS_GetURLSpecFromFile(mimeTypesFile, urlSpec);
NS_ENSURE_SUCCESS(rv, rv);
// Get the data source; if it is going to be created, then load is synchronous.
rv = rdf->GetDataSourceBlocking( urlSpec.get(), getter_AddRefs( mOverRideDataSource ) );
NS_ENSURE_SUCCESS(rv, rv);
// initialize our resources if we haven't done so already...
if (!kNC_Description)
{
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_DESCRIPTION),
getter_AddRefs(kNC_Description));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_VALUE),
getter_AddRefs(kNC_Value));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_FILEEXTENSIONS),
getter_AddRefs(kNC_FileExtensions));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_PATH),
getter_AddRefs(kNC_Path));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_SAVETODISK),
getter_AddRefs(kNC_SaveToDisk));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_USESYSTEMDEFAULT),
getter_AddRefs(kNC_UseSystemDefault));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_HANDLEINTERNAL),
getter_AddRefs(kNC_HandleInternal));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_ALWAYSASK),
getter_AddRefs(kNC_AlwaysAsk));
rdf->GetResource(NS_LITERAL_CSTRING(NC_RDF_PRETTYNAME),
getter_AddRefs(kNC_PrettyName));
}
mDataSourceInitialized = PR_TRUE;
return rv;
}
NS_IMETHODIMP nsExternalHelperAppService::DoContent(const char *aMimeContentType,
nsIRequest *aRequest,
nsISupports *aWindowContext,
nsIStreamListener ** aStreamListener)
{
nsAutoString fileName;
nsCAutoString fileExtension;
PRBool isAttachment = PR_FALSE;
nsresult rv;
// Get the file extension and name that we will need later
nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
if (channel) {
// Check if we have a POST request, in which case we don't want to use
// the url's extension
PRBool allowURLExt = PR_TRUE;
nsCOMPtr<nsIHttpChannel> httpChan = do_QueryInterface(channel);
if (httpChan) {
nsCAutoString requestMethod;
httpChan->GetRequestMethod(requestMethod);
allowURLExt = !requestMethod.Equals("POST");
}
nsCOMPtr<nsIURI> uri;
channel->GetURI(getter_AddRefs(uri));
// Check if we had a query string - we don't want to check the URL
// extension if a query is present in the URI
// If we already know we don't want to check the URL extension, don't
// bother checking the query
if (uri && allowURLExt) {
nsCOMPtr<nsIURL> url = do_QueryInterface(uri);
if (url) {
nsCAutoString query;
// We only care about the query for HTTP and HTTPS URLs
PRBool isHTTP, isHTTPS;
rv = uri->SchemeIs("http", &isHTTP);
if (NS_FAILED(rv))
isHTTP = PR_FALSE;
rv = uri->SchemeIs("https", &isHTTPS);
if (NS_FAILED(rv))
isHTTPS = PR_FALSE;
if (isHTTP || isHTTPS)
url->GetQuery(query);
// Only get the extension if the query is empty; if it isn't, then the
// extension likely belongs to a cgi script and isn't helpful
allowURLExt = query.IsEmpty();
}
}
// Extract name & extension
isAttachment = GetFilenameAndExtensionFromChannel(channel, fileName,
fileExtension,
allowURLExt);
LOG(("Found extension '%s' (filename is '%s', handling attachment: %s)",
fileExtension.get(), NS_ConvertUTF16toUTF8(fileName).get(),
isAttachment ? "true" : "false"));
}
LOG(("HelperAppService::DoContent: mime '%s', extension '%s'\n",
aMimeContentType, fileExtension.get()));
// Try to find a mime object by looking at the mime type/extension
nsCOMPtr<nsIMIMEInfo> mimeInfo;
GetFromTypeAndExtension(aMimeContentType, fileExtension.get(), getter_AddRefs(mimeInfo));
LOG(("Type/Ext lookup found 0x%p\n", mimeInfo.get()));
// No mimeinfo -> we can't continue. probably OOM.
if (!mimeInfo)
return NS_ERROR_OUT_OF_MEMORY;
*aStreamListener = nsnull;
// We want the mimeInfo's primary extension to pass it to
// CreateNewExternalHandler
nsXPIDLCString buf;
mimeInfo->GetPrimaryExtension(getter_Copies(buf));
// this code is incomplete and just here to get things started..
nsExternalAppHandler * handler = CreateNewExternalHandler(mimeInfo,
buf.get(),
fileName,
isAttachment,
aWindowContext);
if (!handler)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aStreamListener = handler);
return NS_OK;
}
NS_IMETHODIMP nsExternalHelperAppService::ApplyDecodingForExtension(const char *aExtension, const char* aEncodingType, PRBool *aApplyDecoding)
{
NS_PRECONDITION(aExtension, "Null extension");
NS_PRECONDITION(aEncodingType, "Null encoding type");
*aApplyDecoding = PR_TRUE;
PRUint32 i;
for(i = 0; i < NS_ARRAY_LENGTH(nonDecodableExtensions); ++i) {
if (!PL_strcasecmp(aExtension, nonDecodableExtensions[i].mFileExtension) &&
!PL_strcasecmp(aEncodingType, nonDecodableExtensions[i].mMimeType)) {
*aApplyDecoding = PR_FALSE;
break;
}
}
return NS_OK;
}
NS_IMETHODIMP nsExternalHelperAppService::LaunchAppWithTempFile(nsIMIMEInfo * aMimeInfo, nsIFile * aTempFile)
{
// this method should only be implemented by each OS specific implementation of this service.
return NS_ERROR_NOT_IMPLEMENTED;
}
nsExternalAppHandler * nsExternalHelperAppService::CreateNewExternalHandler(nsIMIMEInfo * aMIMEInfo,
const char * aTempFileExtension,
const nsAString& aFileName,
PRBool aIsAttachment,
nsISupports * aWindowContext)
{
nsExternalAppHandler* handler = nsnull;
NS_NEWXPCOM(handler, nsExternalAppHandler);
if (!handler)
return nsnull;
// add any XP intialization code for an external handler that we may need here...
// right now we don't have any but i bet we will before we are done.
handler->Init(aMIMEInfo, aTempFileExtension, aWindowContext, aFileName, aIsAttachment, this);
return handler;
}
nsresult nsExternalHelperAppService::FillTopLevelProperties(const char * aContentType, nsIRDFResource * aContentTypeNodeResource,
nsIRDFService * aRDFService, nsIMIMEInfo * aMIMEInfo)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIRDFNode> target;
nsCOMPtr<nsIRDFLiteral> literal;
const PRUnichar * stringValue;
rv = InitDataSource();
if (NS_FAILED(rv)) return NS_OK;
// set the mime type
aMIMEInfo->SetMIMEType(aContentType);
// set the pretty name description, if nonempty
FillLiteralValueFromTarget(aContentTypeNodeResource,kNC_Description, &stringValue);
if (stringValue && *stringValue)
aMIMEInfo->SetDescription(stringValue);
// now iterate over all the file type extensions...
nsCOMPtr<nsISimpleEnumerator> fileExtensions;
mOverRideDataSource->GetTargets(aContentTypeNodeResource, kNC_FileExtensions, PR_TRUE, getter_AddRefs(fileExtensions));
PRBool hasMoreElements = PR_FALSE;
nsCAutoString fileExtension;
nsCOMPtr<nsISupports> element;
if (fileExtensions)
{
fileExtensions->HasMoreElements(&hasMoreElements);
while (hasMoreElements)
{
fileExtensions->GetNext(getter_AddRefs(element));
if (element)
{
literal = do_QueryInterface(element);
if (!literal) return NS_ERROR_FAILURE;
literal->GetValueConst(&stringValue);
fileExtension.AssignWithConversion(stringValue);
if (!fileExtension.IsEmpty())
aMIMEInfo->AppendExtension(fileExtension.get());
}
fileExtensions->HasMoreElements(&hasMoreElements);
} // while we have more extensions to parse....
}
return rv;
}
nsresult nsExternalHelperAppService::FillLiteralValueFromTarget(nsIRDFResource * aSource, nsIRDFResource * aProperty, const PRUnichar ** aLiteralValue)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIRDFLiteral> literal;
nsCOMPtr<nsIRDFNode> target;
*aLiteralValue = nsnull;
rv = InitDataSource();
if (NS_FAILED(rv)) return rv;
mOverRideDataSource->GetTarget(aSource, aProperty, PR_TRUE, getter_AddRefs(target));
if (target)
{
literal = do_QueryInterface(target);
if (!literal)
return NS_ERROR_FAILURE;
literal->GetValueConst(aLiteralValue);
}
else
rv = NS_ERROR_FAILURE;
return rv;
}
nsresult nsExternalHelperAppService::FillContentHandlerProperties(const char * aContentType,
nsIRDFResource * aContentTypeNodeResource,
nsIRDFService * aRDFService,
nsIMIMEInfo * aMIMEInfo)
{
nsCOMPtr<nsIRDFNode> target;
nsCOMPtr<nsIRDFLiteral> literal;
const PRUnichar * stringValue = nsnull;
nsresult rv = NS_OK;
rv = InitDataSource();
if (NS_FAILED(rv)) return rv;
nsCAutoString contentTypeHandlerNodeName(NC_CONTENT_NODE_HANDLER_PREFIX);
contentTypeHandlerNodeName.Append(aContentType);
nsCOMPtr<nsIRDFResource> contentTypeHandlerNodeResource;
aRDFService->GetResource(contentTypeHandlerNodeName, getter_AddRefs(contentTypeHandlerNodeResource));
NS_ENSURE_TRUE(contentTypeHandlerNodeResource, NS_ERROR_FAILURE); // that's not good! we have an error in the rdf file
// now process the application handler information
aMIMEInfo->SetPreferredAction(nsIMIMEInfo::useHelperApp);
// save to disk
FillLiteralValueFromTarget(contentTypeHandlerNodeResource,kNC_SaveToDisk, &stringValue);
NS_NAMED_LITERAL_STRING(trueString, "true");
NS_NAMED_LITERAL_STRING(falseString, "false");
if (stringValue && trueString.Equals(stringValue))
aMIMEInfo->SetPreferredAction(nsIMIMEInfo::saveToDisk);
// use system default
FillLiteralValueFromTarget(contentTypeHandlerNodeResource,kNC_UseSystemDefault, &stringValue);
if (stringValue && trueString.Equals(stringValue))
aMIMEInfo->SetPreferredAction(nsIMIMEInfo::useSystemDefault);
// handle internal
FillLiteralValueFromTarget(contentTypeHandlerNodeResource,kNC_HandleInternal, &stringValue);
if (stringValue && trueString.Equals(stringValue))
aMIMEInfo->SetPreferredAction(nsIMIMEInfo::handleInternally);
// always ask
FillLiteralValueFromTarget(contentTypeHandlerNodeResource,kNC_AlwaysAsk, &stringValue);
// Only skip asking if we are absolutely sure the user does not want
// to be asked. Any sort of bofus data should mean we ask.
aMIMEInfo->SetAlwaysAskBeforeHandling(!stringValue ||
!falseString.Equals(stringValue));
// now digest the external application information
nsCAutoString externalAppNodeName (NC_CONTENT_NODE_EXTERNALAPP_PREFIX);
externalAppNodeName.Append(aContentType);
nsCOMPtr<nsIRDFResource> externalAppNodeResource;
aRDFService->GetResource(externalAppNodeName, getter_AddRefs(externalAppNodeResource));
// Clear out any possibly set preferred application, to match the datasource
aMIMEInfo->SetApplicationDescription(nsnull);
aMIMEInfo->SetPreferredApplicationHandler(nsnull);
if (externalAppNodeResource)
{
FillLiteralValueFromTarget(externalAppNodeResource, kNC_PrettyName, &stringValue);
if (stringValue)
aMIMEInfo->SetApplicationDescription(stringValue);
FillLiteralValueFromTarget(externalAppNodeResource, kNC_Path, &stringValue);
if (stringValue && stringValue[0])
{
nsCOMPtr<nsIFile> application;
GetFileTokenForPath(stringValue, getter_AddRefs(application));
if (application)
aMIMEInfo->SetPreferredApplicationHandler(application);
}
}
return rv;
}
PRBool nsExternalHelperAppService::MIMETypeIsInDataSource(const char * aContentType)
{
nsresult rv = InitDataSource();
if (NS_FAILED(rv)) return PR_FALSE;
if (mOverRideDataSource)
{
// Get the RDF service.
nsCOMPtr<nsIRDFService> rdf = do_GetService(kRDFServiceCID, &rv);
if (NS_FAILED(rv)) return PR_FALSE;
// Build uri for the mimetype resource.
nsCAutoString contentTypeNodeName(NC_CONTENT_NODE_PREFIX);
nsCAutoString contentType(aContentType);
ToLowerCase(contentType);
contentTypeNodeName.Append(contentType);
// Get the mime type resource.
nsCOMPtr<nsIRDFResource> contentTypeNodeResource;
rv = rdf->GetResource(contentTypeNodeName, getter_AddRefs(contentTypeNodeResource));
if (NS_FAILED(rv)) return PR_FALSE;
// Test that there's a #value arc from the mimetype resource to the mimetype literal string.
nsCOMPtr<nsIRDFLiteral> mimeLiteral;
NS_ConvertUTF8toUCS2 mimeType(contentType);
rv = rdf->GetLiteral( mimeType.get(), getter_AddRefs( mimeLiteral ) );
if (NS_FAILED(rv)) return PR_FALSE;
PRBool exists = PR_FALSE;
rv = mOverRideDataSource->HasAssertion(contentTypeNodeResource, kNC_Value, mimeLiteral, PR_TRUE, &exists );
if (NS_SUCCEEDED(rv) && exists) return PR_TRUE;
}
return PR_FALSE;
}
nsresult nsExternalHelperAppService::GetMIMEInfoForMimeTypeFromDS(const char * aContentType, nsIMIMEInfo * aMIMEInfo)
{
NS_ENSURE_ARG_POINTER(aMIMEInfo);
nsresult rv = InitDataSource();
if (NS_FAILED(rv)) return rv;
// can't do anything if we have no datasource...
if (!mOverRideDataSource)
return NS_ERROR_FAILURE;
// Get the RDF service.
nsCOMPtr<nsIRDFService> rdf = do_GetService(kRDFServiceCID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// Build uri for the mimetype resource.
nsCAutoString contentTypeNodeName(NC_CONTENT_NODE_PREFIX);
nsCAutoString contentType(aContentType);
ToLowerCase(contentType);
contentTypeNodeName.Append(contentType);
// Get the mime type resource.
nsCOMPtr<nsIRDFResource> contentTypeNodeResource;
rv = rdf->GetResource(contentTypeNodeName, getter_AddRefs(contentTypeNodeResource));
NS_ENSURE_SUCCESS(rv, rv);
// we need a way to determine if this content type resource is really in the graph or not...
// ...Test that there's a #value arc from the mimetype resource to the mimetype literal string.
nsCOMPtr<nsIRDFLiteral> mimeLiteral;
NS_ConvertUTF8toUCS2 mimeType(contentType);
rv = rdf->GetLiteral( mimeType.get(), getter_AddRefs( mimeLiteral ) );
NS_ENSURE_SUCCESS(rv, rv);
PRBool exists = PR_FALSE;
rv = mOverRideDataSource->HasAssertion(contentTypeNodeResource, kNC_Value, mimeLiteral, PR_TRUE, &exists );
if (NS_SUCCEEDED(rv) && exists)
{
// fill the mimeinfo in based on the values from the data source
rv = FillTopLevelProperties(contentType.get(), contentTypeNodeResource, rdf, aMIMEInfo);
NS_ENSURE_SUCCESS(rv, rv);
rv = FillContentHandlerProperties(contentType.get(), contentTypeNodeResource, rdf, aMIMEInfo);
} // if we have a node in the graph for this content type
// If we had success, but entry doesn't exist, we don't want to return success
else if (NS_SUCCEEDED(rv)) {
rv = NS_ERROR_NOT_AVAILABLE;
}
return rv;
}
nsresult nsExternalHelperAppService::GetMIMEInfoForExtensionFromDS(const char * aFileExtension, nsIMIMEInfo * aMIMEInfo)
{
NS_ENSURE_ARG_POINTER(aMIMEInfo);
nsresult rv = InitDataSource();
if (NS_FAILED(rv)) return rv;
// Can't do anything without a datasource
if (!mOverRideDataSource)
return NS_ERROR_FAILURE;
// Get the RDF service.
nsCOMPtr<nsIRDFService> rdf = do_GetService(kRDFServiceCID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
NS_ConvertUTF8toUCS2 extension(aFileExtension);
ToLowerCase(extension);
nsCOMPtr<nsIRDFLiteral> extensionLiteral;
rv = rdf->GetLiteral(extension.get(), getter_AddRefs( extensionLiteral));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIRDFResource> contentTypeNodeResource;
rv = mOverRideDataSource->GetSource(kNC_FileExtensions,
extensionLiteral,
PR_TRUE,
getter_AddRefs(contentTypeNodeResource));
nsCAutoString contentTypeStr;
if (NS_SUCCEEDED(rv) && contentTypeNodeResource)
{
const PRUnichar* contentType = nsnull;
rv = FillLiteralValueFromTarget(contentTypeNodeResource, kNC_Value, &contentType);
if (contentType)
contentTypeStr.AssignWithConversion(contentType);
if (NS_SUCCEEDED(rv))
{
// fill the mimeinfo based on the values from the data source
rv = FillTopLevelProperties(contentTypeStr.get(), contentTypeNodeResource, rdf, aMIMEInfo);
NS_ENSURE_SUCCESS(rv, rv);
rv = FillContentHandlerProperties(contentTypeStr.get(), contentTypeNodeResource, rdf, aMIMEInfo);
}
} // if we have a node in the graph for this extension
else if (!contentTypeNodeResource)
rv = NS_ERROR_NOT_AVAILABLE;
return rv;
}
already_AddRefed<nsIMIMEInfo> nsExternalHelperAppService::GetMIMEInfoFromOS(const char * aContentType, const char * aFileExt, PRBool* aFound)
{
NS_NOTREACHED("Should be implemented by per-platform derived classes");
return nsnull;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////
// begin external protocol service default implementation...
//////////////////////////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP nsExternalHelperAppService::ExternalProtocolHandlerExists(const char * aProtocolScheme,
PRBool * aHandlerExists)
{
// this method should only be implemented by each OS specific implementation of this service.
*aHandlerExists = PR_FALSE;
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsExternalHelperAppService::IsExposedProtocol(const char * aProtocolScheme, PRBool * aResult)
{
// by default, no protocol is exposed. i.e., by default all link clicks must
// go through the external protocol service. most applications override this
// default behavior.
*aResult = PR_FALSE;
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs)
{
PRBool val;
nsresult rv;
// check the per protocol setting first. it always takes precidence.
// if not set, then use the global setting.
nsCAutoString name;
name = NS_LITERAL_CSTRING("network.protocol-handler.expose.")
+ nsDependentCString(aProtocolScheme);
rv = prefs->GetBoolPref(name.get(), &val);
if (NS_SUCCEEDED(rv))
{
*aResult = val;
}
else
{
rv = prefs->GetBoolPref("network.protocol-handler.expose-all", &val);
if (NS_SUCCEEDED(rv) && val)
*aResult = PR_TRUE;
}
}
return NS_OK;
}
NS_IMETHODIMP nsExternalHelperAppService::LoadUrl(nsIURI * aURL)
{
// this method should only be implemented by each OS specific implementation of this service.
return NS_ERROR_NOT_IMPLEMENTED;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////
// Methods related to deleting temporary files on exit
//////////////////////////////////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP nsExternalHelperAppService::DeleteTemporaryFileOnExit(nsIFile * aTemporaryFile)
{
nsresult rv = NS_OK;
PRBool isFile = PR_FALSE;
nsCOMPtr<nsILocalFile> localFile (do_QueryInterface(aTemporaryFile, &rv));
NS_ENSURE_SUCCESS(rv, rv);
// as a safety measure, make sure the nsIFile is really a file and not a directory object.
localFile->IsFile(&isFile);
if (!isFile) return NS_OK;
mTemporaryFilesList.AppendObject(localFile);
return NS_OK;
}
nsresult nsExternalHelperAppService::ExpungeTemporaryFiles()
{
PRInt32 numEntries = mTemporaryFilesList.Count();
nsILocalFile* localFile;
for (PRInt32 index = 0; index < numEntries; index++)
{
localFile = mTemporaryFilesList[index];
if (localFile)
localFile->Remove(PR_FALSE);
}
mTemporaryFilesList.Clear();
return NS_OK;
}
// XPCOM Shutdown observer
NS_IMETHODIMP
nsExternalHelperAppService::Observe(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData )
{
if (!strcmp(aTopic, "profile-before-change")) {
ExpungeTemporaryFiles();
nsCOMPtr <nsIRDFRemoteDataSource> flushableDataSource = do_QueryInterface(mOverRideDataSource);
if (flushableDataSource)
flushableDataSource->Flush();
mOverRideDataSource = nsnull;
mDataSourceInitialized = PR_FALSE;
}
return NS_OK;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////
// begin external app handler implementation
//////////////////////////////////////////////////////////////////////////////////////////////////////
NS_IMPL_THREADSAFE_ADDREF(nsExternalAppHandler)
NS_IMPL_THREADSAFE_RELEASE(nsExternalAppHandler)
NS_INTERFACE_MAP_BEGIN(nsExternalAppHandler)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStreamListener)
NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
NS_INTERFACE_MAP_ENTRY(nsIHelperAppLauncher)
NS_INTERFACE_MAP_ENTRY(nsIURIContentListener)
NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_END_THREADSAFE
nsExternalAppHandler::nsExternalAppHandler()
{
mCanceled = PR_FALSE;
mReceivedDispositionInfo = PR_FALSE;
mHandlingAttachment = PR_FALSE;
mStopRequestIssued = PR_FALSE;
mDataBuffer = (char *) nsMemory::Alloc((sizeof(char) * DATA_BUFFER_SIZE));
mProgressListenerInitialized = PR_FALSE;
mContentLength = -1;
mProgress = 0;
mHelperAppService = nsnull;
}
nsExternalAppHandler::~nsExternalAppHandler()
{
if (mDataBuffer)
nsMemory::Free(mDataBuffer);
NS_IF_RELEASE(mHelperAppService);
}
NS_IMETHODIMP nsExternalAppHandler::GetInterface(const nsIID & aIID, void * *aInstancePtr)
{
NS_ENSURE_ARG_POINTER(aInstancePtr);
return QueryInterface(aIID, aInstancePtr);
}
NS_IMETHODIMP nsExternalAppHandler::Observe(nsISupports *aSubject, const char *aTopic, const PRUnichar *aData )
{
if (PL_strcmp(aTopic, "oncancel") == 0)
{
// User pressed cancel button on dialog.
return this->Cancel();
}
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::SetWebProgressListener(nsIWebProgressListener * aWebProgressListener)
{
// this call back means we've succesfully brought up the
// progress window so set the appropriate flag, even though
// aWebProgressListener might be null
if (mReceivedDispositionInfo)
mProgressListenerInitialized = PR_TRUE;
// Go ahead and register the progress listener....
if (mLoadCookie)
{
nsCOMPtr<nsIWebProgress> webProgress(do_QueryInterface(mLoadCookie));
if (webProgress)
{
mWebProgressListener = aWebProgressListener;
}
}
// while we were bringing up the progress dialog, we actually finished processing the
// url. If that's the case then mStopRequestIssued will be true. We need to execute the
// operation since we are actually done now.
if (mStopRequestIssued && aWebProgressListener)
{
return ExecuteDesiredAction();
}
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::GetTargetFile(nsIFile** aTarget)
{
if (mFinalFileDestination)
*aTarget = mFinalFileDestination;
else
*aTarget = mTempFile;
NS_IF_ADDREF(*aTarget);
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::GetTimeDownloadStarted(PRTime* aTime)
{
*aTime = mTimeDownloadStarted;
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::CloseProgressWindow()
{
// make our docloader release the progress listener from the progress window...
if (mLoadCookie && mWebProgressListener)
{
nsCOMPtr<nsIWebProgress> webProgress(do_QueryInterface(mLoadCookie));
if (webProgress)
{
webProgress->RemoveProgressListener(mWebProgressListener);
}
}
// release extra state...
mWebProgressListener = nsnull;
mLoadCookie = nsnull;
return NS_OK;
}
nsresult nsExternalAppHandler::RetargetLoadNotifications(nsIRequest *request)
{
// we are going to run the downloading of the helper app in our own little docloader / load group context.
// so go ahead and force the creation of a load group and doc loader for us to use...
nsresult rv = NS_OK;
nsCOMPtr<nsIChannel> aChannel = do_QueryInterface(request);
NS_ENSURE_TRUE(aChannel, NS_ERROR_FAILURE);
nsCOMPtr<nsIURILoader> uriLoader(do_GetService(NS_URI_LOADER_CONTRACTID));
NS_ENSURE_TRUE(uriLoader, NS_ERROR_FAILURE);
nsCOMPtr<nsILoadGroup> newLoadGroup;
nsCOMPtr<nsILoadGroup> oldLoadGroup;
uriLoader->GetLoadGroupForContext(NS_STATIC_CAST(nsIURIContentListener*, this), getter_AddRefs(newLoadGroup));
aChannel->GetLoadGroup(getter_AddRefs(oldLoadGroup));
// we need to store off the original (pre redirect!) channel that initiated the load. We do
// this so later on, we can pass any refresh urls associated with the original channel back to the
// window context which started the whole process. More comments about that are listed below....
// HACK ALERT: it's pretty bogus that we are getting the document channel from the doc loader.
// ideally we should be able to just use mChannel (the channel we are extracting content from) or
// the default load channel associated with the original load group. Unfortunately because
// a redirect may have occurred, the doc loader is the only one with a ptr to the original channel
// which is what we really want....
nsCOMPtr<nsIDocumentLoader> origContextLoader;
uriLoader->GetDocumentLoaderForContext(mWindowContext, getter_AddRefs(origContextLoader));
if (origContextLoader)
origContextLoader->GetDocumentChannel(getter_AddRefs(mOriginalChannel));
if(oldLoadGroup)
oldLoadGroup->RemoveRequest(request, nsnull, NS_OK);
aChannel->SetLoadGroup(newLoadGroup);
nsCOMPtr<nsIInterfaceRequestor> req (do_QueryInterface(mLoadCookie));
aChannel->SetNotificationCallbacks(req);
rv = newLoadGroup->AddRequest(request, nsnull);
return rv;
}
#define SALT_SIZE 8
#define TABLE_SIZE 36
const PRUnichar table[] =
{ 'a','b','c','d','e','f','g','h','i','j',
'k','l','m','n','o','p','q','r','s','t',
'u','v','w','x','y','z','0','1','2','3',
'4','5','6','7','8','9'};
/**
* Make mTempFileExtension contain an extension exactly when its previous value
* is different from mSuggestedFileName's extension, so that it can be appended
* to mSuggestedFileName and form a valid, useful leaf name.
* This is required so that the (renamed) temporary file has the correct extension
* after downloading to make sure the OS will launch the application corresponding
* to the MIME type (which was used to calculate mTempFileExtension). This prevents
* a cgi-script named foobar.exe that returns application/zip from being named
* foobar.exe and executed as an executable file. It also blocks content that
* a web site might provide with a content-disposition header indicating
* filename="foobar.exe" from being downloaded to a file with extension .exe
* and executed.
*/
void nsExternalAppHandler::EnsureSuggestedFileName()
{
// Make sure there is a mTempFileExtension (not "" or ".").
// Remember that mTempFileExtension will always have the leading "."
// (the check for empty is just to be safe).
if (mTempFileExtension.Length() > 1)
{
// Get mSuggestedFileName's current extension.
nsAutoString fileExt;
PRInt32 pos = mSuggestedFileName.RFindChar('.');
if (pos != kNotFound)
mSuggestedFileName.Right(fileExt, mSuggestedFileName.Length() - pos);
// Now, compare fileExt to mTempFileExtension.
if (fileExt.Equals(mTempFileExtension, nsCaseInsensitiveStringComparator()))
{
// Matches -> mTempFileExtension can be empty
mTempFileExtension.Truncate();
}
}
}
nsresult nsExternalAppHandler::SetUpTempFile(nsIChannel * aChannel)
{
nsresult rv = NS_OK;
#if defined(XP_MAC) || defined (XP_MACOSX)
// create a temp file for the data...and open it for writing.
// use NS_MAC_DEFAULT_DOWNLOAD_DIR which gets download folder from InternetConfig
// if it can't get download folder pref, then it uses desktop folder
NS_GetSpecialDirectory(NS_MAC_DEFAULT_DOWNLOAD_DIR, getter_AddRefs(mTempFile));
#else
// create a temp file for the data...and open it for writing.
NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(mTempFile));
#endif
// We need to generate a name for the temp file that we are going to be streaming data to.
// We don't want this name to be predictable for security reasons so we are going to generate a
// "salted" name.....
nsAutoString saltedTempLeafName;
// this salting code was ripped directly from the profile manager.
// turn PR_Now() into milliseconds since epoch
// and salt rand with that.
double fpTime;
LL_L2D(fpTime, PR_Now());
srand((uint)(fpTime * 1e-6 + 0.5));
PRInt32 i;
for (i=0;i<SALT_SIZE;i++)
{
saltedTempLeafName.Append(table[(rand()%TABLE_SIZE)]);
}
// now append our extension.
nsXPIDLCString ext;
mMimeInfo->GetPrimaryExtension(getter_Copies(ext));
if (!ext.IsEmpty()) {
if (ext.First() != '.')
saltedTempLeafName.Append(PRUnichar('.'));
AppendUTF8toUTF16(ext, saltedTempLeafName);
}
mTempFile->Append(saltedTempLeafName); // make this file unique!!!
mTempFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0600);
#if defined(XP_MAC) || defined (XP_MACOSX)
// Now that the file exists set Mac type and creator
if (mMimeInfo)
{
nsCOMPtr<nsILocalFileMac> macfile = do_QueryInterface(mTempFile);
if (macfile)
{
PRUint32 type, creator;
mMimeInfo->GetMacType(&type);
mMimeInfo->GetMacCreator(&creator);
macfile->SetFileType(type);
macfile->SetFileCreator(creator);
}
}
#endif
rv = NS_NewLocalFileOutputStream(getter_AddRefs(mOutStream), mTempFile,
PR_WRONLY | PR_CREATE_FILE, 0600);
#if defined(XP_MAC) || defined (XP_MACOSX)
nsXPIDLCString contentType;
mMimeInfo->GetMIMEType(getter_Copies(contentType));
if (contentType &&
(nsCRT::strcasecmp(contentType, APPLICATION_APPLEFILE) == 0) ||
(nsCRT::strcasecmp(contentType, MULTIPART_APPLEDOUBLE) == 0))
{
nsCOMPtr<nsIAppleFileDecoder> appleFileDecoder = do_CreateInstance(NS_IAPPLEFILEDECODER_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv) && appleFileDecoder)
{
rv = appleFileDecoder->Initialize(mOutStream, mTempFile);
if (NS_SUCCEEDED(rv))
mOutStream = do_QueryInterface(appleFileDecoder, &rv);
}
}
#endif
return rv;
}
NS_IMETHODIMP nsExternalAppHandler::OnStartRequest(nsIRequest *request, nsISupports * aCtxt)
{
NS_ENSURE_ARG_POINTER(request);
// first, check to see if we've been canceled....
if (mCanceled) // then go cancel our underlying channel too
return request->Cancel(NS_BINDING_ABORTED);
nsCOMPtr<nsIChannel> aChannel = do_QueryInterface(request);
// Get content length and URI.
if (aChannel)
{
aChannel->GetContentLength(&mContentLength);
aChannel->GetURI(getter_AddRefs(mSourceUrl));
}
nsresult rv = SetUpTempFile(aChannel);
// Extract mime type for later use below.
nsXPIDLCString MIMEType;
mMimeInfo->GetMIMEType( getter_Copies( MIMEType ) );
// retarget all load notifications to our docloader instead of the original window's docloader...
RetargetLoadNotifications(request);
nsCOMPtr<nsIEncodedChannel> encChannel = do_QueryInterface( aChannel );
if (encChannel)
{
// Turn off content encoding conversions if needed
PRBool applyConversion = PR_TRUE;
nsCOMPtr<nsIURL> sourceURL(do_QueryInterface(mSourceUrl));
if (sourceURL)
{
nsCAutoString extension;
sourceURL->GetFileExtension(extension);
if (!extension.IsEmpty())
{
nsCOMPtr<nsIUTF8StringEnumerator> encEnum;
encChannel->GetContentEncodings(getter_AddRefs(encEnum));
if (encEnum)
{
PRBool hasMore;
rv = encEnum->HasMore(&hasMore);
if (NS_SUCCEEDED(rv) && hasMore)
{
nsCAutoString encType;
rv = encEnum->GetNext(encType);
if (NS_SUCCEEDED(rv) && !encType.IsEmpty())
{
NS_ASSERTION(mHelperAppService, "Not initialized");
mHelperAppService->ApplyDecodingForExtension(extension.get(),
encType.get(),
&applyConversion);
}
}
}
}
}
encChannel->SetApplyConversion( applyConversion );
}
mTimeDownloadStarted = PR_Now();
// now that the temp file is set up, find out if we need to invoke a dialog asking the user what
// they want us to do with this content...
PRBool alwaysAsk = PR_TRUE;
// If we're handling an attachment we want to default to saving but
// always ask just in case
if (!mHandlingAttachment)
{
mMimeInfo->GetAlwaysAskBeforeHandling(&alwaysAsk);
}
if (alwaysAsk)
{
// But we *don't* ask if this mimeInfo didn't come from
// our mimeTypes.rdf data source and the user has said
// at some point in the distant past that they don't
// want to be asked. The latter fact would have been
// stored in pref strings back in the old days.
NS_ASSERTION(mHelperAppService, "Not initialized properly");
if (!mHelperAppService->MIMETypeIsInDataSource(MIMEType.get()))
{
if (!GetNeverAskFlagFromPref(NEVER_ASK_FOR_SAVE_TO_DISK_PREF, MIMEType.get()))
{
// Don't need to ask after all.
alwaysAsk = PR_FALSE;
// Make sure action matches pref (save to disk).
mMimeInfo->SetPreferredAction(nsIMIMEInfo::saveToDisk);
}
else if (!GetNeverAskFlagFromPref(NEVER_ASK_FOR_OPEN_FILE_PREF, MIMEType.get()))
{
// Don't need to ask after all.
alwaysAsk = PR_FALSE;
}
}
}
if (alwaysAsk)
{
// do this first! make sure we don't try to take an action until the user tells us what they want to do
// with it...
mReceivedDispositionInfo = PR_FALSE;
// invoke the dialog!!!!! use mWindowContext as the window context parameter for the dialog request
mDialog = do_CreateInstance( NS_IHELPERAPPLAUNCHERDLG_CONTRACTID, &rv );
NS_ENSURE_SUCCESS(rv, rv);
rv = mDialog->Show( this, mWindowContext, mHandlingAttachment );
// what do we do if the dialog failed? I guess we should call Cancel and abort the load....
}
else
{
mReceivedDispositionInfo = PR_TRUE; // no need to wait for a response from the user
// We need to do the save/open immediately, then.
PRInt32 action = nsIMIMEInfo::saveToDisk;
mMimeInfo->GetPreferredAction( &action );
#ifdef XP_WIN
/* We need to see whether the file we've got here could be
* executable. If it could, we had better not try to open it!
* This code mirrors the code in
* nsExternalAppHandler::LaunchWithApplication so that what we
* test here is as close as possible to what will really be
* happening if we decide to execute
*/
nsCOMPtr<nsIFile> fileToTest;
GetTargetFile(getter_AddRefs(fileToTest));
if (fileToTest) {
PRBool isExecutable;
rv = fileToTest->IsExecutable(&isExecutable);
if ((NS_SUCCEEDED(rv) && isExecutable) ||
NS_FAILED(rv)) { // Paranoia is good
action = nsIMIMEInfo::saveToDisk;
}
} else { // Paranoia is good here too, though this really should not happen
NS_WARNING("GetDownloadInfo returned a null file after the temp file has been set up! ");
action = nsIMIMEInfo::saveToDisk;
}
#endif
if (action == nsIMIMEInfo::useHelperApp ||
action == nsIMIMEInfo::useSystemDefault)
{
rv = LaunchWithApplication(nsnull, PR_FALSE);
}
else // Various unknown actions go here too
{
rv = SaveToDisk(nsnull, PR_FALSE);
}
}
// Now let's mark the downloaded URL as visited
nsCOMPtr<nsIGlobalHistory> history(do_GetService(NS_GLOBALHISTORY_CONTRACTID));
nsCAutoString spec;
mSourceUrl->GetSpec(spec);
if (history && !spec.IsEmpty())
{
history->AddPage(spec.get());
}
return NS_OK;
}
// Convert error info into proper message text and send OnStatusChange notification
// to the web progress listener.
void nsExternalAppHandler::SendStatusChange(ErrorType type, nsresult rv, nsIRequest *aRequest, const nsAFlatString &path)
{
nsAutoString msgId;
switch(rv)
{
case NS_ERROR_OUT_OF_MEMORY:
// No memory
msgId = NS_LITERAL_STRING("noMemory");
break;
case NS_ERROR_FILE_DISK_FULL:
case NS_ERROR_FILE_NO_DEVICE_SPACE:
// Out of space on target volume.
msgId = NS_LITERAL_STRING("diskFull");
break;
case NS_ERROR_FILE_READ_ONLY:
// Attempt to write to read/only file.
msgId = NS_LITERAL_STRING("readOnly");
break;
case NS_ERROR_FILE_ACCESS_DENIED:
// Attempt to write without sufficient permissions.
msgId = NS_LITERAL_STRING("accessError");
break;
case NS_ERROR_FILE_NOT_FOUND:
case NS_ERROR_FILE_TARGET_DOES_NOT_EXIST:
case NS_ERROR_FILE_UNRECOGNIZED_PATH:
// Helper app not found, let's verify this happened on launch
if (type == kLaunchError) {
msgId = NS_LITERAL_STRING("helperAppNotFound");
break;
}
// fall through
default:
// Generic read/write/launch error message.
switch(type)
{
case kReadError:
msgId = NS_LITERAL_STRING("readError");
break;
case kWriteError:
msgId = NS_LITERAL_STRING("writeError");
break;
case kLaunchError:
msgId = NS_LITERAL_STRING("launchError");
break;
}
break;
}
PR_LOG(nsExternalHelperAppService::mLog, PR_LOG_ERROR,
("Error: %s, listener=0x%p, rv=0x%08X\n", NS_LossyConvertUCS2toASCII(msgId).get(), mWebProgressListener.get(), rv));
// Get properties file bundle and extract status string.
nsCOMPtr<nsIStringBundleService> s = do_GetService(NS_STRINGBUNDLE_CONTRACTID);
if (s)
{
nsCOMPtr<nsIStringBundle> bundle;
if (NS_SUCCEEDED(s->CreateBundle("chrome://global/locale/nsWebBrowserPersist.properties", getter_AddRefs(bundle))))
{
nsXPIDLString msgText;
const PRUnichar *strings[] = { path.get() };
if(NS_SUCCEEDED(bundle->FormatStringFromName(msgId.get(), strings, 1, getter_Copies(msgText))))
{
if (mWebProgressListener)
{
// We have a listener, let it handle the error.
mWebProgressListener->OnStatusChange(nsnull, (type == kReadError) ? aRequest : nsnull, rv, msgText);
}
else
{
// We don't have a listener. Simply show the alert ourselves.
nsCOMPtr<nsIPromptService> prompter(do_GetService("@mozilla.org/embedcomp/prompt-service;1"));
nsXPIDLString title;
bundle->FormatStringFromName(NS_LITERAL_STRING("title").get(),
strings,
1,
getter_Copies(title));
if (prompter)
{
// Extract parent window from context.
nsCOMPtr<nsIDOMWindow> parent(do_GetInterface(mWindowContext));
prompter->Alert(parent, title, msgText);
}
}
}
}
}
}
NS_IMETHODIMP nsExternalAppHandler::OnDataAvailable(nsIRequest *request, nsISupports * aCtxt,
nsIInputStream * inStr, PRUint32 sourceOffset, PRUint32 count)
{
nsresult rv = NS_OK;
// first, check to see if we've been canceled....
if (mCanceled) // then go cancel our underlying channel too
return request->Cancel(NS_BINDING_ABORTED);
// read the data out of the stream and write it to the temp file.
if (mOutStream && mDataBuffer && count > 0)
{
PRUint32 numBytesRead = 0;
PRUint32 numBytesWritten = 0;
mProgress += count;
PRBool readError = PR_TRUE;
while (NS_SUCCEEDED(rv) && count > 0) // while we still have bytes to copy...
{
readError = PR_TRUE;
rv = inStr->Read(mDataBuffer, PR_MIN(count, DATA_BUFFER_SIZE - 1), &numBytesRead);
if (NS_SUCCEEDED(rv))
{
if (count >= numBytesRead)
count -= numBytesRead; // subtract off the number of bytes we just read
else
count = 0;
readError = PR_FALSE;
// Write out the data until something goes wrong, or, it is
// all written. We loop because for some errors (e.g., disk
// full), we get NS_OK with some bytes written, then an error.
// So, we want to write again in that case to get the actual
// error code.
const char *bufPtr = mDataBuffer; // Where to write from.
while (NS_SUCCEEDED(rv) && numBytesRead)
{
numBytesWritten = 0;
rv = mOutStream->Write(bufPtr, numBytesRead, &numBytesWritten);
if (NS_SUCCEEDED(rv))
{
numBytesRead -= numBytesWritten;
bufPtr += numBytesWritten;
// Force an error if (for some reason) we get NS_OK but
// no bytes written.
if (!numBytesWritten)
{
rv = NS_ERROR_FAILURE;
}
}
}
}
}
if (NS_SUCCEEDED(rv))
{
// Set content length if we haven't already got it.
if (mContentLength == -1)
{
nsCOMPtr<nsIChannel> aChannel(do_QueryInterface(request));
if (aChannel)
{
aChannel->GetContentLength(&mContentLength);
}
}
// Send progress notification.
if (mWebProgressListener)
{
mWebProgressListener->OnProgressChange(nsnull, request, mProgress, mContentLength, mProgress, mContentLength);
}
}
else
{
// An error occurred, notify listener.
nsAutoString tempFilePath;
if (mTempFile)
mTempFile->GetPath(tempFilePath);
SendStatusChange(readError ? kReadError : kWriteError, rv, request, tempFilePath);
// Cancel the download.
Cancel();
}
}
return rv;
}
NS_IMETHODIMP nsExternalAppHandler::OnStopRequest(nsIRequest *request, nsISupports *aCtxt,
nsresult aStatus)
{
mStopRequestIssued = PR_TRUE;
// Cancel if the request did not complete successfully.
if (!mCanceled && NS_FAILED(aStatus))
{
// Send error notification.
nsAutoString tempFilePath;
if (mTempFile)
mTempFile->GetPath(tempFilePath);
SendStatusChange( kReadError, aStatus, request, tempFilePath );
Cancel();
}
// first, check to see if we've been canceled....
if (mCanceled) { // then go cancel our underlying channel too
nsresult rv = request->Cancel(NS_BINDING_ABORTED);
return rv;
}
// close the stream...
if (mOutStream)
{
mOutStream->Close();
mOutStream = nsnull;
}
// Do what the user asked for
return ExecuteDesiredAction();
}
nsresult nsExternalAppHandler::ExecuteDesiredAction()
{
nsresult rv = NS_OK;
if (mProgressListenerInitialized && !mCanceled)
{
nsMIMEInfoHandleAction action = nsIMIMEInfo::saveToDisk;
mMimeInfo->GetPreferredAction(&action);
if (action == nsIMIMEInfo::useHelperApp ||
action == nsIMIMEInfo::useSystemDefault)
{
// Make sure the suggested name is unique since in this case we don't
// have a file name that was guaranteed to be unique by going through
// the File Save dialog
rv = mFinalFileDestination->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0600);
if (NS_SUCCEEDED(rv))
{
// Source and dest dirs should be == so this should just do a rename
rv = MoveFile(mFinalFileDestination);
if (NS_SUCCEEDED(rv))
rv = OpenWithApplication(nsnull);
}
}
else // Various unknown actions go here too
{
// XXX Put progress dialog in barber-pole mode
// and change text to say "Copying from:".
rv = MoveFile(mFinalFileDestination);
}
// Notify dialog that download is complete.
// By waiting till this point, it ensures that the progress dialog doesn't indicate
// success until we're really done.
if(mWebProgressListener)
{
if (!mCanceled)
{
mWebProgressListener->OnProgressChange(nsnull, nsnull, mContentLength, mContentLength, mContentLength, mContentLength);
}
mWebProgressListener->OnStateChange(nsnull, nsnull, nsIWebProgressListener::STATE_STOP, NS_OK);
}
}
return rv;
}
nsresult nsExternalAppHandler::Init(nsIMIMEInfo * aMIMEInfo,
const char * aTempFileExtension,
nsISupports * aWindowContext,
const nsAString& aSuggestedFilename,
PRBool aIsAttachment,
nsExternalHelperAppService *aHelperAppService)
{
mWindowContext = aWindowContext;
mMimeInfo = aMIMEInfo;
mHandlingAttachment = aIsAttachment;
// make sure the extention includes the '.'
if (aTempFileExtension && *aTempFileExtension != '.')
mTempFileExtension = PRUnichar('.');
mTempFileExtension.AppendWithConversion(aTempFileExtension);
mSuggestedFileName = aSuggestedFilename;
// replace platform specific path separator and illegal characters to avoid any confusion
mSuggestedFileName.ReplaceChar(FILE_PATH_SEPARATOR FILE_ILLEGAL_CHARACTERS, '-');
mTempFileExtension.ReplaceChar(FILE_PATH_SEPARATOR FILE_ILLEGAL_CHARACTERS, '-');
// Make sure extension is correct.
EnsureSuggestedFileName();
mHelperAppService = aHelperAppService;
NS_IF_ADDREF(mHelperAppService);
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::GetMIMEInfo(nsIMIMEInfo ** aMIMEInfo)
{
*aMIMEInfo = mMimeInfo;
NS_IF_ADDREF(*aMIMEInfo);
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::GetSource(nsIURI ** aSourceURI)
{
NS_ENSURE_ARG(aSourceURI);
*aSourceURI = mSourceUrl;
NS_IF_ADDREF(*aSourceURI);
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::GetSuggestedFileName(PRUnichar ** aSuggestedFileName)
{
*aSuggestedFileName = ToNewUnicode(mSuggestedFileName);
return NS_OK;
}
nsresult nsExternalAppHandler::InitializeDownload(nsIDownload* aDownload)
{
nsresult rv;
nsCOMPtr<nsILocalFile> local = do_QueryInterface(mFinalFileDestination);
rv = aDownload->Init(mSourceUrl, local, nsnull,
mMimeInfo, mTimeDownloadStarted, nsnull);
if (NS_FAILED(rv)) return rv;
rv = aDownload->SetObserver(this);
return rv;
}
nsresult nsExternalAppHandler::CreateProgressListener()
{
// we are back from the helper app dialog (where the user chooses to save or open), but we aren't
// done processing the load. in this case, throw up a progress dialog so the user can see what's going on...
nsresult rv;
nsCOMPtr<nsIWebProgressListener> listener;
nsCOMPtr<nsIDownload> dl = do_CreateInstance("@mozilla.org/download;1", &rv);
if (NS_SUCCEEDED(rv)) {
InitializeDownload(dl);
listener = do_QueryInterface(dl);
}
// note we might not have a listener here if the QI() failed, or if
// there is no nsIDownload object, but we still call
// SetWebProgressListener() to make sure our progress state is sane
SetWebProgressListener(listener);
return rv;
}
nsresult nsExternalAppHandler::PromptForSaveToFile(nsILocalFile ** aNewFile, const nsAFlatString &aDefaultFile, const nsAFlatString &aFileExtension)
{
// invoke the dialog!!!!! use mWindowContext as the window context parameter for the dialog request
// XXX Convert to use file picker?
nsresult rv = NS_OK;
if (!mDialog)
{
// Get helper app launcher dialog.
mDialog = do_CreateInstance( NS_IHELPERAPPLAUNCHERDLG_CONTRACTID, &rv );
NS_ENSURE_SUCCESS(rv, rv);
}
// we want to explicitly unescape aDefaultFile b4 passing into the dialog. we can't unescape
// it because the dialog is implemented by a JS component which doesn't have a window so no unescape routine is defined...
rv = mDialog->PromptForSaveToFile(this,
mWindowContext,
aDefaultFile.get(),
aFileExtension.get(),
aNewFile);
return rv;
}
nsresult nsExternalAppHandler::MoveFile(nsIFile * aNewFileLocation)
{
nsresult rv = NS_OK;
NS_ASSERTION(mStopRequestIssued, "uhoh, how did we get here if we aren't done getting data?");
nsCOMPtr<nsILocalFile> fileToUse = do_QueryInterface(aNewFileLocation);
// if the on stop request was actually issued then it's now time to actually perform the file move....
if (mStopRequestIssued && fileToUse)
{
// Unfortunately, MoveTo will fail if a file already exists at the user specified location....
// but the user has told us, this is where they want the file! (when we threw up the save to file dialog,
// it told them the file already exists and do they wish to over write it. So it should be okay to delete
// fileToUse if it already exists.
PRBool equalToTempFile = PR_FALSE;
PRBool filetoUseAlreadyExists = PR_FALSE;
fileToUse->Equals(mTempFile, &equalToTempFile);
fileToUse->Exists(&filetoUseAlreadyExists);
if (filetoUseAlreadyExists && !equalToTempFile)
fileToUse->Remove(PR_FALSE);
// extract the new leaf name from the file location
nsCAutoString fileName;
fileToUse->GetNativeLeafName(fileName);
nsCOMPtr<nsIFile> directoryLocation;
fileToUse->GetParent(getter_AddRefs(directoryLocation));
if (directoryLocation)
{
rv = mTempFile->MoveToNative(directoryLocation, fileName);
}
if (NS_FAILED(rv))
{
// Send error notification.
nsAutoString path;
fileToUse->GetPath(path);
SendStatusChange(kWriteError, rv, nsnull, path);
Cancel(); // Cancel (and clean up temp file).
}
}
return rv;
}
// SaveToDisk should only be called by the helper app dialog which allows
// the user to say launch with application or save to disk. It doesn't actually
// perform the save, it just prompts for the destination file name. The actual save
// won't happen until we are done downloading the content and are sure we've
// shown a progress dialog. This was done to simplify the
// logic that was showing up in this method. Internal callers who actually want
// to preform the save should call ::MoveFile
NS_IMETHODIMP nsExternalAppHandler::SaveToDisk(nsIFile * aNewFileLocation, PRBool aRememberThisPreference)
{
nsresult rv = NS_OK;
if (mCanceled)
return NS_OK;
mMimeInfo->SetPreferredAction(nsIMIMEInfo::saveToDisk);
// The helper app dialog has told us what to do.
mReceivedDispositionInfo = PR_TRUE;
nsCOMPtr<nsILocalFile> fileToUse = do_QueryInterface(aNewFileLocation);
if (!fileToUse)
{
nsAutoString leafName;
mTempFile->GetLeafName(leafName);
if (mSuggestedFileName.IsEmpty())
rv = PromptForSaveToFile(getter_AddRefs(fileToUse), leafName, mTempFileExtension);
else
{
nsAutoString fileExt;
PRInt32 pos = mSuggestedFileName.RFindChar('.');
if (pos >= 0)
mSuggestedFileName.Right(fileExt, mSuggestedFileName.Length() - pos);
if (fileExt.IsEmpty())
fileExt = mTempFileExtension;
rv = PromptForSaveToFile(getter_AddRefs(fileToUse), mSuggestedFileName, fileExt);
}
if (NS_FAILED(rv) || !fileToUse) {
Cancel();
return NS_ERROR_FAILURE;
}
}
mFinalFileDestination = do_QueryInterface(fileToUse);
if (!mProgressListenerInitialized)
CreateProgressListener();
// now that the user has chosen the file location to save to, it's okay to fire the refresh tag
// if there is one. We don't want to do this before the save as dialog goes away because this dialog
// is modal and we do bad things if you try to load a web page in the underlying window while a modal
// dialog is still up.
ProcessAnyRefreshTags();
return NS_OK;
}
nsresult nsExternalAppHandler::OpenWithApplication(nsIFile * aApplication)
{
nsresult rv = NS_OK;
if (mCanceled)
return NS_OK;
// we only should have gotten here if the on stop request had been fired already.
NS_ASSERTION(mStopRequestIssued, "uhoh, how did we get here if we aren't done getting data?");
// if a stop request was already issued then proceed with launching the application.
if (mStopRequestIssued)
{
NS_ASSERTION(mHelperAppService, "Not initialized");
rv = mHelperAppService->LaunchAppWithTempFile(mMimeInfo, mFinalFileDestination);
if (NS_FAILED(rv))
{
// Send error notification.
nsAutoString path;
mFinalFileDestination->GetPath(path);
SendStatusChange(kLaunchError, rv, nsnull, path);
Cancel(); // Cancel, and clean up temp file.
}
else
{
#if !defined(XP_MAC) && !defined (XP_MACOSX)
// Mac users have been very verbal about temp files being deleted on app exit - they
// don't like it - but we'll continue to do this on other platforms for now
mHelperAppService->DeleteTemporaryFileOnExit(mFinalFileDestination);
#endif
}
}
return rv;
}
// LaunchWithApplication should only be called by the helper app dialog which allows
// the user to say launch with application or save to disk. It doesn't actually
// perform launch with application. That won't happen until we are done downloading
// the content and are sure we've showna progress dialog. This was done to simplify the
// logic that was showing up in this method.
NS_IMETHODIMP nsExternalAppHandler::LaunchWithApplication(nsIFile * aApplication, PRBool aRememberThisPreference)
{
if (mCanceled)
return NS_OK;
// user has chosen to launch using an application, fire any refresh tags now...
ProcessAnyRefreshTags();
mReceivedDispositionInfo = PR_TRUE;
if (mMimeInfo && aApplication)
mMimeInfo->SetPreferredApplicationHandler(aApplication);
// Now check if the file is local, in which case we won't bother with saving
// it to a temporary directory and just launch it from where it is
nsCOMPtr<nsIFileURL> fileUrl(do_QueryInterface(mSourceUrl));
if (fileUrl)
{
Cancel();
nsCOMPtr<nsIFile> file;
nsresult rv = fileUrl->GetFile(getter_AddRefs(file));
if (NS_SUCCEEDED(rv))
{
NS_ASSERTION(mHelperAppService, "Not initialized");
rv = mHelperAppService->LaunchAppWithTempFile(mMimeInfo, file);
if (NS_SUCCEEDED(rv))
return NS_OK;
}
nsAutoString path;
if (file)
file->GetPath(path);
// If we get here, an error happened
SendStatusChange(kLaunchError, rv, nsnull, path);
return rv;
}
// Now that the user has elected to launch the downloaded file with a helper app, we're justified in
// removing the 'salted' name. We'll rename to what was specified in mSuggestedFileName after the
// download is done prior to launching the helper app. So that any existing file of that name won't
// be overwritten we call CreateUnique() before calling MoveFile(). Also note that we use the same
// directory as originally downloaded to so that MoveFile() just does an in place rename.
nsCOMPtr<nsIFile> fileToUse;
// The directories specified here must match those specified in SetUpTempFile(). This avoids
// having to do a copy of the file when it finishes downloading and the potential for errors
// that would introduce
#if defined(XP_MAC) || defined (XP_MACOSX)
NS_GetSpecialDirectory(NS_MAC_DEFAULT_DOWNLOAD_DIR, getter_AddRefs(fileToUse));
#else
NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(fileToUse));
#endif
if (mSuggestedFileName.IsEmpty())
{
// Keep using the leafname of the temp file, since we're just starting a helper
mTempFile->GetLeafName(mSuggestedFileName);
}
#ifdef XP_WIN
fileToUse->Append(mSuggestedFileName + mTempFileExtension);
#else
fileToUse->Append(mSuggestedFileName);
#endif
// We'll make sure this results in a unique name later
mFinalFileDestination = do_QueryInterface(fileToUse);
// launch the progress window now that the user has picked the desired action.
if (!mProgressListenerInitialized)
CreateProgressListener();
return NS_OK;
}
NS_IMETHODIMP nsExternalAppHandler::Cancel()
{
mCanceled = PR_TRUE;
// shutdown our stream to the temp file
if (mOutStream)
{
mOutStream->Close();
mOutStream = nsnull;
}
// clean up after ourselves and delete the temp file...
if (mTempFile)
{
mTempFile->Remove(PR_TRUE);
mTempFile = nsnull;
}
return NS_OK;
}
void nsExternalAppHandler::ProcessAnyRefreshTags()
{
// one last thing, try to see if the original window context supports a refresh interface...
// Sometimes, when you download content that requires an external handler, there is
// a refresh header associated with the download. This refresh header points to a page
// the content provider wants the user to see after they download the content. How do we
// pass this refresh information back to the caller? For now, try to get the refresh URI
// interface. If the window context where the request originated came from supports this
// then we can force it to process the refresh information (if there is any) from this channel.
if (mWindowContext && mOriginalChannel)
{
nsCOMPtr<nsIRefreshURI> refreshHandler (do_GetInterface(mWindowContext));
if (refreshHandler)
refreshHandler->SetupRefreshURI(mOriginalChannel);
mOriginalChannel = nsnull;
}
}
PRBool nsExternalAppHandler::GetNeverAskFlagFromPref(const char * prefName, const char * aContentType)
{
// Search the obsolete pref strings.
nsresult rv;
nsCOMPtr<nsIPrefService> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
nsCOMPtr<nsIPrefBranch> prefBranch;
if (prefs)
rv = prefs->GetBranch(NEVER_ASK_PREF_BRANCH, getter_AddRefs(prefBranch));
if (NS_SUCCEEDED(rv) && prefBranch)
{
nsXPIDLCString prefCString;
nsCAutoString prefValue;
rv = prefBranch->GetCharPref(prefName, getter_Copies(prefCString));
if (NS_SUCCEEDED(rv) && !prefCString.IsEmpty())
{
NS_UnescapeURL(prefCString);
nsACString::const_iterator start, end;
prefCString.BeginReading(start);
prefCString.EndReading(end);
if (CaseInsensitiveFindInReadable(nsDependentCString(aContentType), start, end))
return PR_FALSE;
}
}
// Default is true, if not found in the pref string.
return PR_TRUE;
}
// nsIURIContentListener implementation
NS_IMETHODIMP
nsExternalAppHandler::OnStartURIOpen(nsIURI* aURI, PRBool* aAbortOpen)
{
return NS_OK;
}
NS_IMETHODIMP
nsExternalAppHandler::IsPreferred(const char * aContentType,
char ** aDesiredContentType,
PRBool * aCanHandleContent)
{
NS_NOTREACHED("IsPreferred");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsExternalAppHandler::CanHandleContent(const char * aContentType,
PRBool aIsContentPreferred,
char ** aDesiredContentType,
PRBool * aCanHandleContent)
{
NS_NOTREACHED("CanHandleContent");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsExternalAppHandler::DoContent(const char * aContentType,
PRBool aIsContentPreferred,
nsIRequest * aRequest,
nsIStreamListener ** aContentHandler,
PRBool * aAbortProcess)
{
NS_NOTREACHED("DoContent");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsExternalAppHandler::GetParentContentListener(nsIURIContentListener** aParent)
{
*aParent = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsExternalAppHandler::SetParentContentListener(nsIURIContentListener* aParent)
{
return NS_OK;
}
NS_IMETHODIMP
nsExternalAppHandler::GetLoadCookie(nsISupports ** aLoadCookie)
{
*aLoadCookie = mLoadCookie;
NS_IF_ADDREF(*aLoadCookie);
return NS_OK;
}
NS_IMETHODIMP
nsExternalAppHandler::SetLoadCookie(nsISupports * aLoadCookie)
{
mLoadCookie = aLoadCookie;
return NS_OK;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
// The following section contains our nsIMIMEService implementation and related methods.
//
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
// nsIMIMEService methods
NS_IMETHODIMP nsExternalHelperAppService::GetFromTypeAndExtension(const char *aMIMEType, const char *aFileExt, nsIMIMEInfo **_retval)
{
NS_PRECONDITION((aMIMEType && *aMIMEType) ||
(aFileExt && *aFileExt),
"Give me something to work with");
LOG(("Getting mimeinfo from type '%s' ext '%s'\n", aMIMEType, aFileExt));
*_retval = nsnull;
// (1) Ask the OS for a mime info
PRBool found;
*_retval = GetMIMEInfoFromOS(aMIMEType, aFileExt, &found).get();
LOG(("OS gave back 0x%p - found: %s\n", *_retval, found ? "yes" : "no"));
// If we got no mimeinfo, something went wrong. Probably lack of memory.
if (!*_retval)
return NS_ERROR_OUT_OF_MEMORY;
// (2) Now, let's see if we can find something in our datasource
nsresult rv = NS_ERROR_FAILURE;
if (aMIMEType && *aMIMEType) {
// This will not overwrite the OS information that interests us
// (i.e. default application, default app. description)
rv = GetMIMEInfoForMimeTypeFromDS(aMIMEType, *_retval);
found = found || NS_SUCCEEDED(rv);
}
LOG(("Data source: Via type: retval 0x%08x\n", rv));
if (!found || NS_FAILED(rv)) {
// No type match, try extension match
if (aFileExt && *aFileExt) {
rv = GetMIMEInfoForExtensionFromDS(aFileExt, *_retval);
LOG(("Data source: Via ext: retval 0x%08x\n", rv));
found = NS_SUCCEEDED(rv);
if (found && aMIMEType && *aMIMEType)
(*_retval)->SetMIMEType(aMIMEType);
}
}
// (3) No match yet. Ask extras.
if (!found) {
rv = NS_ERROR_FAILURE;
if (aMIMEType && *aMIMEType) {
#ifdef XP_WIN
/* XXX Gross hack to wallpaper over the most common Win32
* extension issues caused by the fix for bug 116938. See bug
* 120327, comment 271 for why this is needed. Not even sure we
* want to remove this once we have fixed all this stuff to work
* right; any info we get from extras on this type is pretty much
* useless....
*/
if (PL_strcasecmp(aMIMEType, APPLICATION_OCTET_STREAM) != 0)
#endif
rv = GetMIMEInfoForMimeTypeFromExtras(aMIMEType, *_retval);
LOG(("Searched extras (by type), rv 0x%08X\n", rv));
}
// If that didn't work out, try file extension from extras
if (NS_FAILED(rv) && aFileExt && *aFileExt) {
rv = GetMIMEInfoForExtensionFromExtras(aFileExt, *_retval);
if (NS_SUCCEEDED(rv) && aMIMEType && *aMIMEType)
(*_retval)->SetMIMEType(aMIMEType);
LOG(("Searched extras (by ext), rv 0x%08X\n", rv));
}
}
// Finally, check if we got a file extension and if yes, if it is an
// extension on the mimeinfo, in which case we want it to be the primary one
if (aFileExt && *aFileExt) {
PRBool matches = PR_FALSE;
(*_retval)->ExtensionExists(aFileExt, &matches);
LOG(("Extension '%s' matches mime info: %s\n", aFileExt, matches ? "yes" : "no"));
if (matches)
(*_retval)->SetPrimaryExtension(aFileExt);
}
// Verify we have a type.
nsXPIDLCString type;
(*_retval)->GetMIMEType(getter_Copies(type));
#ifdef PR_LOGGING
if (LOG_ENABLED()) {
nsXPIDLCString ext;
(*_retval)->GetPrimaryExtension(getter_Copies(ext));
LOG(("MIME Info Summary: Type '%s', Primary Ext '%s'\n", type.get(), ext.get()));
}
#endif
if (type.IsEmpty()) {
NS_RELEASE(*_retval);
return NS_ERROR_NOT_AVAILABLE;
}
return NS_OK;
}
NS_IMETHODIMP nsExternalHelperAppService::GetTypeFromExtension(const char *aFileExt, char **aContentType)
{
// First of all, check our default entries
for (size_t i = 0; i < NS_ARRAY_LENGTH(defaultMimeEntries); i++)
{
if (nsCRT::strcasecmp(defaultMimeEntries[i].mFileExtension, aFileExt) == 0) {
*aContentType = nsCRT::strdup(defaultMimeEntries[i].mMimeType);
return NS_OK;
}
}
nsresult rv = NS_OK;
nsCOMPtr<nsIMIMEInfo> info;
rv = GetFromTypeAndExtension(nsnull, aFileExt, getter_AddRefs(info));
if (NS_FAILED(rv)) {
// Try the plugins
const char* mimeType;
nsCOMPtr<nsIPluginHost> pluginHost (do_GetService(kPluginManagerCID, &rv));
if (NS_SUCCEEDED(rv)) {
if (pluginHost->IsPluginEnabledForExtension(aFileExt, mimeType) == NS_OK)
{
*aContentType = nsCRT::strdup(mimeType);
rv = NS_OK;
return rv;
}
else
{
rv = NS_ERROR_FAILURE;
}
}
}
if (NS_FAILED(rv)) {
return rv;
} // endif
return info->GetMIMEType(aContentType);
}
NS_IMETHODIMP nsExternalHelperAppService::GetPrimaryExtension(const char* aMIMEType, const char* aFileExt, char** _retval)
{
NS_ENSURE_ARG_POINTER(aMIMEType);
nsCOMPtr<nsIMIMEInfo> mi;
nsresult rv = GetFromTypeAndExtension(aMIMEType, aFileExt, getter_AddRefs(mi));
if (NS_FAILED(rv))
return rv;
return mi->GetPrimaryExtension(_retval);
}
NS_IMETHODIMP nsExternalHelperAppService::GetTypeFromURI(nsIURI *aURI, char **aContentType)
{
NS_PRECONDITION(aContentType, "Null out param!");
nsresult rv = NS_ERROR_NOT_AVAILABLE;
*aContentType = nsnull;
// First look for a file to use. If we have one, we just use that.
nsCOMPtr<nsIFileURL> fileUrl = do_QueryInterface(aURI);
if (fileUrl) {
nsCOMPtr<nsIFile> file;
rv = fileUrl->GetFile(getter_AddRefs(file));
if (NS_SUCCEEDED(rv)) {
rv = GetTypeFromFile(file, aContentType);
if (NS_SUCCEEDED(rv)) {
// we got something!
return rv;
}
}
}
// Now try to get an nsIURL so we don't have to do our own parsing
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
if (url) {
nsCAutoString ext;
rv = url->GetFileExtension(ext);
if (NS_FAILED(rv)) return rv;
if (ext.IsEmpty()) {
return NS_ERROR_NOT_AVAILABLE;
}
return GetTypeFromExtension(ext.get(), aContentType);
}
// no url, let's give the raw spec a shot
nsCAutoString specStr;
rv = aURI->GetSpec(specStr);
if (NS_FAILED(rv)) return rv;
// find the file extension (if any)
PRInt32 extLoc = specStr.RFindChar('.');
PRInt32 specLength = specStr.Length();
if (-1 != extLoc &&
extLoc != specLength - 1 &&
// nothing over 20 chars long can be sanely considered an
// extension.... Dat dere would be just data.
specLength - extLoc < 20)
{
return GetTypeFromExtension(PromiseFlatCString(
Substring(specStr, extLoc + 1, specStr.Length() - extLoc - 1)
).get(), aContentType);
}
// We found no information; say so.
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP nsExternalHelperAppService::GetTypeFromFile( nsIFile* aFile, char **aContentType )
{
nsresult rv;
nsCOMPtr<nsIMIMEInfo> info;
// Get the Extension
nsCAutoString fileName;
const char* ext = nsnull;
rv = aFile->GetNativeLeafName(fileName);
if (NS_FAILED(rv)) return rv;
if (!fileName.IsEmpty())
{
PRInt32 len = fileName.Length();
for (PRInt32 i = len; i >= 0; i--)
{
if (fileName[i] == '.')
{
ext = fileName.get() + i + 1;
break;
}
}
}
nsCAutoString fileExt( ext );
// Handle the mac case
#if defined(XP_MAC) || defined (XP_MACOSX)
nsCOMPtr<nsILocalFileMac> macFile;
macFile = do_QueryInterface( aFile, &rv );
if ( NS_SUCCEEDED( rv ) && fileExt.IsEmpty())
{
PRUint32 type, creator;
macFile->GetFileType( (OSType*)&type );
macFile->GetFileCreator( (OSType*)&creator );
nsCOMPtr<nsIInternetConfigService> icService (do_GetService(NS_INTERNETCONFIGSERVICE_CONTRACTID));
if (icService)
{
rv = icService->GetMIMEInfoFromTypeCreator(type, creator, fileExt.get(), getter_AddRefs(info));
if ( NS_SUCCEEDED( rv) )
return info->GetMIMEType(aContentType);
}
}
#endif
// Windows, unix and mac when no type match occured.
if (fileExt.IsEmpty())
return NS_ERROR_FAILURE;
return GetTypeFromExtension( fileExt.get(), aContentType );
}
nsresult nsExternalHelperAppService::GetMIMEInfoForMimeTypeFromExtras(const char * aContentType, nsIMIMEInfo * aMIMEInfo )
{
NS_ENSURE_ARG( aMIMEInfo );
NS_ENSURE_ARG_POINTER( aContentType );
NS_ENSURE_ARG( *aContentType );
// Look for default entry with matching mime type.
nsCAutoString MIMEType(aContentType);
ToLowerCase(MIMEType);
PRInt32 numEntries = NS_ARRAY_LENGTH(extraMimeEntries);
for (PRInt32 index = 0; index < numEntries; index++)
{
if ( MIMEType.Equals(extraMimeEntries[index].mMimeType) )
{
// This is the one. Set attributes appropriately.
aMIMEInfo->SetFileExtensions(extraMimeEntries[index].mFileExtensions);
aMIMEInfo->SetDescription(NS_ConvertASCIItoUCS2(extraMimeEntries[index].mDescription).get());
aMIMEInfo->SetMacType(extraMimeEntries[index].mMactype);
aMIMEInfo->SetMacCreator(extraMimeEntries[index].mMacCreator);
return NS_OK;
}
}
return NS_ERROR_NOT_AVAILABLE;
}
nsresult nsExternalHelperAppService::GetMIMEInfoForExtensionFromExtras(const char* aExtension, nsIMIMEInfo * aMIMEInfo )
{
NS_ENSURE_ARG( aMIMEInfo );
NS_ASSERTION(aExtension, "Null aExtension parameter!");
NS_ASSERTION(*aExtension, "Empty aExtension parameter!");
// Look for default entry with matching extension.
nsDependentCString extension(aExtension);
nsDependentCString::const_iterator start, end, iter;
PRInt32 numEntries = NS_ARRAY_LENGTH(extraMimeEntries);
for (PRInt32 index = 0; index < numEntries; index++)
{
nsDependentCString extList(extraMimeEntries[index].mFileExtensions);
extList.BeginReading(start);
extList.EndReading(end);
iter = start;
while (start != end)
{
FindCharInReadable(',', iter, end);
if (Substring(start, iter).Equals(extension,
nsCaseInsensitiveCStringComparator()))
{
// Set attributes appropriately.
aMIMEInfo->SetMIMEType(extraMimeEntries[index].mMimeType);
aMIMEInfo->SetFileExtensions(extraMimeEntries[index].mFileExtensions);
aMIMEInfo->SetDescription(NS_ConvertASCIItoUCS2(extraMimeEntries[index].mDescription).get());
aMIMEInfo->SetMacType(extraMimeEntries[index].mMactype);
aMIMEInfo->SetMacCreator(extraMimeEntries[index].mMacCreator);
return NS_OK;
}
if (iter != end) {
++iter;
}
start = iter;
}
}
return NS_ERROR_NOT_AVAILABLE;
}
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