path: root/embed/mozilla/EphyHeaderSniffer.cpp

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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 Chimera code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   David Hyatt  <hyatt@netscape.com>
 *   Simon Fraser <sfraser@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK *****
 *
 * $Id$
 */

#include "mozilla-config.h"

#include "config.h"

#include "MozDownload.h"
#include "EphyHeaderSniffer.h"

#include "ephy-file-chooser.h"
#include "ephy-prefs.h"
#include "ephy-gui.h"
#include "eel-gconf-extensions.h"
#include "ephy-debug.h"

#include <glib/gi18n.h>
#include <libgnomevfs/gnome-vfs-utils.h>

#include <nsIChannel.h>
#include <nsIHttpChannel.h>
#include <nsIURL.h>
#include <nsIPrefService.h>
#include <nsIMIMEService.h>
#include <nsIMIMEInfo.h>
#include <nsIDOMHTMLDocument.h>
#include <nsIDownload.h>
#include <nsIMIMEHeaderParam.h>
#include <nsIWindowWatcher.h>

EphyHeaderSniffer::EphyHeaderSniffer (nsIWebBrowserPersist* aPersist, MozillaEmbedPersist *aEmbedPersist,
        nsIFile* aFile, nsIURI* aURL, nsIDOMDocument* aDocument, nsIInputStream* aPostData,
        EphyEmbedSingle *single)
: mPersist(aPersist)
, mEmbedPersist(aEmbedPersist)
, mTmpFile(aFile)
, mURL(aURL)
, mOriginalURI(nsnull)
, mDocument(aDocument)
, mPostData(aPostData)
{
        LOG ("EphyHeaderSniffer ctor (%p)", this);

        nsCOMPtr<nsIWindowWatcher> watcher
                (do_GetService("@mozilla.org/embedcomp/window-watcher;1"));
    if (!watcher) return;

    watcher->GetNewAuthPrompter (nsnull, getter_AddRefs (mAuthPrompt));

    mSingle = single;
    g_object_add_weak_pointer (G_OBJECT (mSingle),
                   (gpointer *)&mSingle);
}

EphyHeaderSniffer::~EphyHeaderSniffer()
{
    LOG ("EphyHeaderSniffer dtor (%p)", this);

    if (mSingle)
    {
        g_object_remove_weak_pointer (G_OBJECT (mSingle),
                          (gpointer *)&mSingle);
    }
}

NS_IMPL_ISUPPORTS2(EphyHeaderSniffer, nsIWebProgressListener, nsIAuthPrompt)

NS_IMETHODIMP
EphyHeaderSniffer::HandleContent ()
{
    gboolean handled = FALSE;
    nsEmbedCString uriSpec;

    if (mPostData || !mSingle) return NS_ERROR_FAILURE;

    mURL->GetSpec (uriSpec);
    
    g_signal_emit_by_name (mSingle, "handle_content", mContentType.get(),
                   uriSpec.get(), &handled);

    return handled ? NS_OK : NS_ERROR_FAILURE;
}

NS_IMETHODIMP 
EphyHeaderSniffer::OnStateChange (nsIWebProgress *aWebProgress, nsIRequest *aRequest, PRUint32 aStateFlags, 
                                  PRUint32 aStatus)
{  
    if (aStateFlags & nsIWebProgressListener::STATE_START)
    {
        /* be sure to keep it alive while we save since it owns
           us as a listener and keep ourselves alive */
        nsCOMPtr<nsIWebBrowserPersist> kungFuDeathGrip(mPersist);
        nsCOMPtr<nsIWebProgressListener> kungFuSuicideGrip(this);
    
        nsresult rv;
        nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest, &rv);
        if (!channel) return rv;
        channel->GetContentType(mContentType);
    
        nsCOMPtr<nsIURI> origURI;
        channel->GetOriginalURI(getter_AddRefs(origURI));
    
        nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
        if (httpChannel)
        {
            httpChannel->GetResponseHeader(nsEmbedCString("content-disposition"),
                               mContentDisposition);
        }
    
        mPersist->CancelSave();

        PRBool exists;
        mTmpFile->Exists(&exists);
        if (exists)
        {
            mTmpFile->Remove(PR_FALSE);
        }

        rv = HandleContent ();
        if (NS_SUCCEEDED (rv)) return NS_OK;

        rv = PerformSave(origURI);
        if (NS_FAILED(rv))
        {
            /* FIXME put up some UI */
      
        }
    }

    return NS_OK;
}

NS_IMETHODIMP 
EphyHeaderSniffer::OnProgressChange (nsIWebProgress *aWebProgress, 
                                     nsIRequest *aRequest, 
                                     PRInt32 aCurSelfProgress, 
                                     PRInt32 aMaxSelfProgress, 
                                     PRInt32 aCurTotalProgress, 
                                     PRInt32 aMaxTotalProgress)
{
    return NS_OK;
}

NS_IMETHODIMP 
EphyHeaderSniffer::OnLocationChange (nsIWebProgress *aWebProgress, 
                     nsIRequest *aRequest, 
                     nsIURI *location)
{
    return NS_OK;
}

NS_IMETHODIMP 
EphyHeaderSniffer::OnStatusChange (nsIWebProgress *aWebProgress, 
                   nsIRequest *aRequest, 
                   nsresult aStatus, 
                   const PRUnichar *aMessage)
{
    return NS_OK;
}

NS_IMETHODIMP 
EphyHeaderSniffer::OnSecurityChange (nsIWebProgress *aWebProgress, nsIRequest *aRequest, PRUint32 state)
{
    return NS_OK;
}

static void
filechooser_response_cb (GtkWidget *dialog,
             gint response, 
             EphyHeaderSniffer* sniffer)
{
    if (response == GTK_RESPONSE_ACCEPT)
    {
        char *filename;

        filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));

        if (ephy_gui_confirm_overwrite_file (dialog, filename) == FALSE)
        {
            g_free (filename);
            return;
        }

        nsCOMPtr<nsILocalFile> destFile = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID);
        if (destFile)
        {
            destFile->InitWithNativePath (nsEmbedCString (filename));

            sniffer->InitiateDownload (destFile);
        }

        g_free (filename);
    }

    // FIXME how to inform user of failed save ?

    gtk_widget_destroy (GTK_WIDGET (dialog));
}

nsresult EphyHeaderSniffer::PerformSave (nsIURI* inOriginalURI)
{
    nsresult rv;
    EphyEmbedPersistFlags flags;
    PRBool askDownloadDest;

    mOriginalURI = inOriginalURI;

    flags = ephy_embed_persist_get_flags (EPHY_EMBED_PERSIST (mEmbedPersist));
    askDownloadDest = flags & EPHY_EMBED_PERSIST_ASK_DESTINATION;

    nsEmbedString defaultFileName;

    if (!defaultFileName.Length() && mContentDisposition.Length())
    {
        /* 1 Use the HTTP header suggestion. */
        nsCOMPtr<nsIMIMEHeaderParam> mimehdrpar =
            do_GetService("@mozilla.org/network/mime-hdrparam;1");     
        
        if (mimehdrpar)
        {
            nsEmbedCString fallbackCharset;
            if (mURL)
            {
                mURL->GetOriginCharset(fallbackCharset);
            }
            
            nsEmbedString fileName;
            
            rv = mimehdrpar->GetParameter (mContentDisposition, "filename",
                               fallbackCharset, PR_TRUE, nsnull,
                               fileName);
            if (NS_FAILED(rv) || !fileName.Length())
            {
                rv = mimehdrpar->GetParameter (mContentDisposition, "name",
                                   fallbackCharset, PR_TRUE, nsnull,
                                   fileName);
            }

            if (NS_SUCCEEDED(rv) && fileName.Length())
            {
                defaultFileName = fileName;
            }
        }
    }
    
    if (!defaultFileName.Length())
    {
        /* 2 For file URLs, use the file name. */

        nsCOMPtr<nsIURL> url(do_QueryInterface(mURL));
        if (url)
        {
            nsEmbedCString fileNameCString;
            url->GetFileName(fileNameCString);
            NS_CStringToUTF16 (fileNameCString, NS_CSTRING_ENCODING_UTF8,
                       defaultFileName);
        }
    }
    
    if (!defaultFileName.Length() && mDocument)
    {
        /* 3 Use the title of the document. */

        nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(mDocument));
        if (htmlDoc)
        {
            htmlDoc->GetTitle(defaultFileName);
        }
    }
    
    if (!defaultFileName.Length() && mURL)
    {
        /* 4 Use the host. */
        nsEmbedCString hostName;
        mURL->GetHost(hostName);
        NS_CStringToUTF16 (hostName, NS_CSTRING_ENCODING_UTF8,
                   defaultFileName);
    }
    
    /* 5 One last case to handle about:blank and other untitled pages. */
    if (!defaultFileName.Length())
    {
        NS_CStringToUTF16 (nsEmbedCString(_("Untitled")),
                   NS_CSTRING_ENCODING_UTF8, defaultFileName);
    }
        
    /* Validate the file name to ensure legality. */
    nsEmbedCString cDefaultFileName;
    NS_UTF16ToCString (defaultFileName, NS_CSTRING_ENCODING_UTF8,
               cDefaultFileName);
    char *default_name = g_strdup (cDefaultFileName.get());
    default_name = g_strdelimit (default_name, "/\\:", ' ');

    const char *key;
    key = ephy_embed_persist_get_persist_key (EPHY_EMBED_PERSIST (mEmbedPersist));

    /* FIXME: do better here by using nsITextToSubURI service, like in
     * http://lxr.mozilla.org/seamonkey/source/xpfe/communicator/resources/content/contentAreaUtils.js#763
     */
        char *filename;
        filename = gnome_vfs_unescape_string (default_name, NULL);

        if (!g_utf8_validate (filename, -1, NULL))
        {
                g_free (filename);
                filename = g_strdup (default_name);
        }

    g_free (default_name);

    if (askDownloadDest)
    {
        EphyFileChooser *dialog;
        GtkWindow *window;
        const char *title;

        title = ephy_embed_persist_get_fc_title (EPHY_EMBED_PERSIST (mEmbedPersist));
        window = ephy_embed_persist_get_fc_parent (EPHY_EMBED_PERSIST (mEmbedPersist));

        dialog = ephy_file_chooser_new (title ? title: _("Save"),
                        GTK_WIDGET (window),
                        GTK_FILE_CHOOSER_ACTION_SAVE,
                        key ? key : CONF_STATE_SAVE_DIR,
                        EPHY_FILE_FILTER_ALL_SUPPORTED);

        gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (dialog),
                                                   filename);

        g_signal_connect (dialog, "response",
                  G_CALLBACK (filechooser_response_cb), this);

        gtk_widget_show (GTK_WIDGET (dialog));

                g_free (filename);
        return NS_OK;
    }
    /* FIXME: how to inform user of failed save ? */

    nsCOMPtr<nsILocalFile> destFile;
    BuildDownloadPath (filename, getter_AddRefs (destFile));
        g_free (filename);
    NS_ENSURE_TRUE (destFile, NS_ERROR_FAILURE);

    return InitiateDownload (destFile);
}

nsresult EphyHeaderSniffer::InitiateDownload (nsILocalFile *aDestFile)
{
    LOG ("Initiating download");

    return InitiateMozillaDownload (mDocument, mURL, aDestFile,
                    mContentType.get(), mOriginalURI, mEmbedPersist,
                    mPostData, nsnull, -1);
}