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gecko-dev/netwerk/protocol/about/nsAboutCache.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Henrik Gemal <mozilla@gemal.dk>
* Darin Fisher <darin@netscape.com>
* Alexey Chernyak <alexeyc@bigfoot.com> (XHTML 1.1 conversion)
* Steffen Wilberg <steffen.wilberg@web.de> (new layout)
*
* 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 ***** */
#include "nsAboutCache.h"
#include "nsIIOService.h"
#include "nsIServiceManager.h"
#include "nsIInputStream.h"
#include "nsIStorageStream.h"
#include "nsISimpleEnumerator.h"
#include "nsXPIDLString.h"
#include "nsIURI.h"
#include "nsCOMPtr.h"
#include "nsNetUtil.h"
#include "prtime.h"
#include "nsEscape.h"
#include "nsICacheService.h"
static PRTime SecondsToPRTime(PRUint32 t_sec)
{
PRTime t_usec, usec_per_sec;
LL_I2L(t_usec, t_sec);
LL_I2L(usec_per_sec, PR_USEC_PER_SEC);
LL_MUL(t_usec, t_usec, usec_per_sec);
return t_usec;
}
static void PrintTimeString(char *buf, PRUint32 bufsize, PRUint32 t_sec)
{
PRExplodedTime et;
PRTime t_usec = SecondsToPRTime(t_sec);
PR_ExplodeTime(t_usec, PR_LocalTimeParameters, &et);
PR_FormatTime(buf, bufsize, "%Y-%m-%d %H:%M:%S", &et);
}
NS_IMPL_ISUPPORTS2(nsAboutCache, nsIAboutModule, nsICacheVisitor)
NS_IMETHODIMP
nsAboutCache::NewChannel(nsIURI *aURI, nsIChannel **result)
{
NS_ENSURE_ARG_POINTER(aURI);
nsresult rv;
PRUint32 bytesWritten;
*result = nsnull;
// Get the cache manager service
nsCOMPtr<nsICacheService> cacheService =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIStorageStream> storageStream;
nsCOMPtr<nsIOutputStream> outputStream;
// Init: (block size, maximum length)
rv = NS_NewStorageStream(256, (PRUint32)-1, getter_AddRefs(storageStream));
if (NS_FAILED(rv)) return rv;
rv = storageStream->GetOutputStream(0, getter_AddRefs(outputStream));
if (NS_FAILED(rv)) return rv;
mBuffer.AssignLiteral(
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
" <title>Information about the Cache Service</title>\n"
" <link rel=\"stylesheet\" "
"href=\"chrome://global/skin/about.css\" type=\"text/css\"/>\n"
" <link rel=\"stylesheet\" "
"href=\"chrome://global/skin/aboutCache.css\" type=\"text/css\"/>\n"
"</head>\n"
"<body class=\"aboutPageWideContainer\">\n"
"<h1>Information about the Cache Service</h1>\n");
outputStream->Write(mBuffer.get(), mBuffer.Length(), &bytesWritten);
rv = ParseURI(aURI, mDeviceID);
if (NS_FAILED(rv)) return rv;
mStream = outputStream;
// nsCacheService::VisitEntries calls nsMemoryCacheDevice::Visit,
// nsDiskCacheDevice::Visit and nsOfflineCacheDevice::Visit,
// each of which call
// 1. VisitDevice (for about:cache),
// 2. VisitEntry in a loop (for about:cache?device=disk etc.)
rv = cacheService->VisitEntries(this);
mBuffer.Truncate();
if (rv == NS_ERROR_NOT_AVAILABLE) {
mBuffer.AppendLiteral("<h2>The cache is disabled.</h2>\n");
}
else if (NS_FAILED(rv)) {
return rv;
}
if (!mDeviceID.IsEmpty()) {
mBuffer.AppendLiteral("</table>\n");
}
mBuffer.AppendLiteral("</body>\n"
"</html>\n");
outputStream->Write(mBuffer.get(), mBuffer.Length(), &bytesWritten);
nsCOMPtr<nsIInputStream> inStr;
rv = storageStream->NewInputStream(0, getter_AddRefs(inStr));
if (NS_FAILED(rv)) return rv;
nsIChannel* channel;
rv = NS_NewInputStreamChannel(&channel, aURI, inStr,
NS_LITERAL_CSTRING("text/html"),
NS_LITERAL_CSTRING("utf-8"));
if (NS_FAILED(rv)) return rv;
*result = channel;
return rv;
}
NS_IMETHODIMP
nsAboutCache::GetURIFlags(nsIURI *aURI, PRUint32 *result)
{
*result = 0;
return NS_OK;
}
NS_IMETHODIMP
nsAboutCache::VisitDevice(const char *deviceID,
nsICacheDeviceInfo *deviceInfo,
PRBool *visitEntries)
{
PRUint32 bytesWritten, value, entryCount;
nsXPIDLCString str;
*visitEntries = PR_FALSE;
if (mDeviceID.IsEmpty() || mDeviceID.Equals(deviceID)) {
// We need mStream for this
if (!mStream)
return NS_ERROR_FAILURE;
// Write out the Cache Name
deviceInfo->GetDescription(getter_Copies(str));
mBuffer.AssignLiteral("<h2>");
mBuffer.Append(str);
mBuffer.AppendLiteral("</h2>\n"
"<table id=\"");
mBuffer.Append(deviceID);
mBuffer.AppendLiteral("\">\n");
// Write out cache info
// Number of entries
mBuffer.AppendLiteral(" <tr>\n"
" <th>Number of entries:</th>\n"
" <td>");
entryCount = 0;
deviceInfo->GetEntryCount(&entryCount);
mBuffer.AppendInt(entryCount);
mBuffer.AppendLiteral("</td>\n"
" </tr>\n");
// Maximum storage size
mBuffer.AppendLiteral(" <tr>\n"
" <th>Maximum storage size:</th>\n"
" <td>");
value = 0;
deviceInfo->GetMaximumSize(&value);
mBuffer.AppendInt(value/1024);
mBuffer.AppendLiteral(" KiB</td>\n"
" </tr>\n");
// Storage in use
mBuffer.AppendLiteral(" <tr>\n"
" <th>Storage in use:</th>\n"
" <td>");
value = 0;
deviceInfo->GetTotalSize(&value);
mBuffer.AppendInt(value/1024);
mBuffer.AppendLiteral(" KiB</td>\n"
" </tr>\n");
deviceInfo->GetUsageReport(getter_Copies(str));
mBuffer.Append(str);
if (mDeviceID.IsEmpty()) { // The about:cache case
if (entryCount != 0) { // Add the "List Cache Entries" link
mBuffer.AppendLiteral(" <tr>\n"
" <th><a href=\"about:cache?device=");
mBuffer.Append(deviceID);
mBuffer.AppendLiteral("\">List Cache Entries</a></th>\n"
" </tr>\n");
}
mBuffer.AppendLiteral("</table>\n");
} else { // The about:cache?device=disk etc. case
mBuffer.AppendLiteral("</table>\n");
if (entryCount != 0) {
*visitEntries = PR_TRUE;
mBuffer.AppendLiteral("<hr/>\n"
"<table id=\"entries\">\n"
" <colgroup>\n"
" <col id=\"col-key\">\n"
" <col id=\"col-dataSize\">\n"
" <col id=\"col-fetchCount\">\n"
" <col id=\"col-lastModified\">\n"
" <col id=\"col-expires\">\n"
" </colgroup>\n"
" <thead>\n"
" <tr>\n"
" <th>Key</th>\n"
" <th>Data size</th>\n"
" <th>Fetch count</th>\n"
" <th>Last modified</th>\n"
" <th>Expires</th>\n"
" </tr>\n"
" </thead>\n");
}
}
mStream->Write(mBuffer.get(), mBuffer.Length(), &bytesWritten);
}
return NS_OK;
}
NS_IMETHODIMP
nsAboutCache::VisitEntry(const char *deviceID,
nsICacheEntryInfo *entryInfo,
PRBool *visitNext)
{
// We need mStream for this
if (!mStream)
return NS_ERROR_FAILURE;
nsresult rv;
PRUint32 bytesWritten;
nsCAutoString key;
nsXPIDLCString clientID;
PRBool streamBased;
rv = entryInfo->GetKey(key);
if (NS_FAILED(rv)) return rv;
rv = entryInfo->GetClientID(getter_Copies(clientID));
if (NS_FAILED(rv)) return rv;
rv = entryInfo->IsStreamBased(&streamBased);
if (NS_FAILED(rv)) return rv;
// Generate a about:cache-entry URL for this entry...
nsCAutoString url;
url.AssignLiteral("about:cache-entry?client=");
url += clientID;
url.AppendLiteral("&amp;sb=");
url += streamBased ? '1' : '0';
url.AppendLiteral("&amp;key=");
char* escapedKey = nsEscapeHTML(key.get());
url += escapedKey; // key
// Entry start...
mBuffer.AssignLiteral(" <tr>\n");
// URI
mBuffer.AppendLiteral(" <td><a href=\"");
mBuffer.Append(url);
mBuffer.AppendLiteral("\">");
mBuffer.Append(escapedKey);
nsMemory::Free(escapedKey);
mBuffer.AppendLiteral("</a></td>\n");
// Content length
PRUint32 length = 0;
entryInfo->GetDataSize(&length);
mBuffer.AppendLiteral(" <td>");
mBuffer.AppendInt(length);
mBuffer.AppendLiteral(" bytes</td>\n");
// Number of accesses
PRInt32 fetchCount = 0;
entryInfo->GetFetchCount(&fetchCount);
mBuffer.AppendLiteral(" <td>");
mBuffer.AppendInt(fetchCount);
mBuffer.AppendLiteral("</td>\n");
// vars for reporting time
char buf[255];
PRUint32 t;
// Last modified time
mBuffer.AppendLiteral(" <td>");
entryInfo->GetLastModified(&t);
if (t) {
PrintTimeString(buf, sizeof(buf), t);
mBuffer.Append(buf);
} else
mBuffer.AppendLiteral("No last modified time");
mBuffer.AppendLiteral("</td>\n");
// Expires time
mBuffer.AppendLiteral(" <td>");
entryInfo->GetExpirationTime(&t);
if (t < 0xFFFFFFFF) {
PrintTimeString(buf, sizeof(buf), t);
mBuffer.Append(buf);
} else {
mBuffer.AppendLiteral("No expiration time");
}
mBuffer.AppendLiteral("</td>\n");
// Entry is done...
mBuffer.AppendLiteral(" </tr>\n");
mStream->Write(mBuffer.get(), mBuffer.Length(), &bytesWritten);
*visitNext = PR_TRUE;
return NS_OK;
}
nsresult
nsAboutCache::ParseURI(nsIURI * uri, nsCString &deviceID)
{
//
// about:cache[?device=string]
//
nsresult rv;
deviceID.Truncate();
nsCAutoString path;
rv = uri->GetPath(path);
if (NS_FAILED(rv)) return rv;
nsACString::const_iterator start, valueStart, end;
path.BeginReading(start);
path.EndReading(end);
valueStart = end;
if (!FindInReadable(NS_LITERAL_CSTRING("?device="), start, valueStart))
return NS_OK;
deviceID.Assign(Substring(valueStart, end));
return NS_OK;
}
nsresult
nsAboutCache::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
{
nsAboutCache* about = new nsAboutCache();
if (about == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(about);
nsresult rv = about->QueryInterface(aIID, aResult);
NS_RELEASE(about);
return rv;
}
////////////////////////////////////////////////////////////////////////////////
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