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 *****
 *
 * $Id$
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "MozillaPrivate.h"

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

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

#include "nsReadableUtils.h"
#include "nsIChannel.h"
#include "nsIHttpChannel.h"
#include "nsIURL.h"
#include "nsIStringEnumerator.h"
#include "nsIPrefService.h"
#include "nsIMIMEService.h"
#include "nsIMIMEInfo.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDownload.h"

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

EphyHeaderSniffer::EphyHeaderSniffer (nsIWebBrowserPersist* aPersist, MozillaEmbedPersist *aEmbedPersist,
        nsIFile* aFile, nsIURI* aURL, nsIDOMDocument* aDocument, nsIInputStream* aPostData)
: mPersist(aPersist)
, mEmbedPersist(aEmbedPersist)
, mTmpFile(aFile)
, mURL(aURL)
, mOriginalURI(nsnull)
, mDocument(aDocument)
, mPostData(aPostData)
{
    mPrompt = do_GetService("@mozilla.org/embedcomp/prompt-service;1");

    LOG ("EphyHeaderSniffer constructor")
}

EphyHeaderSniffer::~EphyHeaderSniffer()
{
    LOG ("EphyHeaderSniffer destructor")
}

NS_IMPL_ISUPPORTS2(EphyHeaderSniffer, nsIWebProgressListener, nsIAuthPrompt)

NS_IMETHODIMP
EphyHeaderSniffer::HandleContent ()
{
    EphyEmbedSingle *single;
    gboolean handled = FALSE;
    nsCString uriSpec;

    if (mPostData) return NS_ERROR_FAILURE;

    mURL->GetSpec (uriSpec);    
    single = ephy_embed_shell_get_embed_single (embed_shell);
    g_signal_emit_by_name (single, "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(nsCAutoString("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 (EphyFileChooser *dialog, gint response, EphyHeaderSniffer* sniffer)
{
    if (response == EPHY_RESPONSE_SAVE)
    {
        char *filename;
        GtkWidget *parent = NULL; // FIXME!

        filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));

        LOG ("Filename %s", filename)

        if (filename &&
            ephy_gui_confirm_overwrite_file (parent, filename) == TRUE)
        {
            nsCOMPtr<nsILocalFile> destFile = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID);
            if (destFile)
            {
                destFile->InitWithNativePath (nsDependentCString (filename));
            
                sniffer->InitiateDownload (destFile);
            }
        }
    }

    // FIXME how to inform user of failed save ?

    gtk_widget_destroy (GTK_WIDGET (dialog));
}

nsresult EphyHeaderSniffer::PerformSave (nsIURI* inOriginalURI)
{
    nsresult rv;
    char *path, *download_dir;
    EmbedPersistFlags flags;
    PRBool askDownloadDest;

    mOriginalURI = inOriginalURI;

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

    nsAutoString defaultFileName;

    if (defaultFileName.IsEmpty() && !mContentDisposition.IsEmpty())
    {
        /* 1 Use the HTTP header suggestion. */
        PRInt32 index = mContentDisposition.Find("filename=");
        if (index >= 0)
        {
            /* Take the substring following the prefix. */
            index += strlen ("filename=");
            nsCAutoString filename;
            mContentDisposition.Right(filename, mContentDisposition.Length() - index);
            defaultFileName = NS_ConvertUTF8toUCS2(filename);
        }
    }
    
    if (defaultFileName.IsEmpty())
    {
        /* 2 For file URLs, use the file name. */

        nsCOMPtr<nsIURL> url(do_QueryInterface(mURL));
        if (url)
        {
            nsCAutoString fileNameCString;
            url->GetFileName(fileNameCString);
            defaultFileName = NS_ConvertUTF8toUCS2(fileNameCString);
        }
    }
    
    if (defaultFileName.IsEmpty() && mDocument)
    {
        /* 3 Use the title of the document. */

        nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(mDocument));
        if (htmlDoc)
        {
            htmlDoc->GetTitle(defaultFileName);
        }
    }
    
    if (defaultFileName.IsEmpty() && mURL)
    {
        /* 4 Use the host. */
        nsCAutoString hostName;
        mURL->GetHost(hostName);
        defaultFileName = NS_ConvertUTF8toUCS2(hostName);
    }
    
    /* 5 One last case to handle about:blank and other untitled pages. */
    if (defaultFileName.IsEmpty())
    {
        defaultFileName.AssignWithConversion(_("Untitled"));
    }
        
    /* Validate the file name to ensure legality. */
    for (PRUint32 i = 0; i < defaultFileName.Length(); i++)
    {
        if (defaultFileName[i] == ':' || defaultFileName[i] == '/')
        {
            defaultFileName.SetCharAt(i, PRUnichar(' '));
        }
    }

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

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

        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_DOWNLOAD_DIR);

        gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (dialog),
                           NS_ConvertUCS2toUTF8 (defaultFileName).get());

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

        gtk_widget_show (GTK_WIDGET (dialog));

        return NS_OK;
    }
    /* FIXME ask user if overwriting ? */

    /* FIXME: how to inform user of failed save ? */

    download_dir = eel_gconf_get_string (CONF_STATE_DOWNLOAD_DIR);
    if (!download_dir)
    {
        /* Emergency download destination */
        download_dir = g_strdup (g_get_home_dir ());
    }

    if (!strcmp (download_dir, "Desktop"))
    {
        if (eel_gconf_get_boolean (CONF_DESKTOP_IS_HOME_DIR))
        {
            path = g_build_filename 
                (g_get_home_dir (),
                 NS_ConvertUCS2toUTF8 (defaultFileName).get(),
                 NULL);
        }
        else
        {
            path = g_build_filename 
                (g_get_home_dir (), "Desktop",
                 NS_ConvertUCS2toUTF8 (defaultFileName).get(),
                 NULL);
        }
    }
    else
    {
        path = g_build_filename
            (gnome_vfs_expand_initial_tilde (download_dir),
             NS_ConvertUCS2toUTF8 (defaultFileName).get(),
             NULL);
    }
    g_free (download_dir);
            
        nsCOMPtr<nsILocalFile> destFile = do_CreateInstance (NS_LOCAL_FILE_CONTRACTID);
    destFile->InitWithNativePath (nsDependentCString (path));
    g_free (path);

    return InitiateDownload (destFile);
}

nsresult EphyHeaderSniffer::InitiateDownload (nsILocalFile *aDestFile)
{
    LOG ("Initiating download")
    return InitiateMozillaDownload (mDocument, mURL, aDestFile,
                    mContentType.get(), mOriginalURI, mEmbedPersist,
                    mPostData, nsnull);
}

NS_IMETHODIMP EphyHeaderSniffer::Prompt (const PRUnichar *dialogTitle, const PRUnichar *text,
                         const PRUnichar *passwordRealm, PRUint32 savePassword,
                         const PRUnichar *defaultText, PRUnichar **result, PRBool *_retval)
{
    if (defaultText) *result = ToNewUnicode(nsDependentString(defaultText));

    return mPrompt->Prompt (nsnull, dialogTitle, text, result,
                nsnull, nsnull, _retval);
}                                                                                                                            

NS_IMETHODIMP EphyHeaderSniffer::PromptUsernameAndPassword (const PRUnichar *dialogTitle, const PRUnichar *text,
                                    const PRUnichar *passwordRealm, PRUint32 savePassword,
                                    PRUnichar **user, PRUnichar **pwd, PRBool *_retval)
{
    *_retval = savePassword;

    return mPrompt->PromptUsernameAndPassword (nsnull, dialogTitle, text, user, pwd,
                           nsnull, nsnull, _retval);
}

NS_IMETHODIMP EphyHeaderSniffer::PromptPassword (const PRUnichar *dialogTitle, const PRUnichar *text,
                             const PRUnichar *passwordRealm, PRUint32 savePassword,
                             PRUnichar **pwd, PRBool *_retval)
{
    *_retval = savePassword;

    return mPrompt->PromptPassword (nsnull, dialogTitle, text, pwd,
                    nsnull, nsnull, _retval);
}