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gecko/netwerk/protocol/about/nsAboutCache.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsAboutCache.h"
#include "nsIInputStream.h"
#include "nsIStorageStream.h"
#include "nsIURI.h"
#include "nsCOMPtr.h"
#include "nsNetUtil.h"
#include "nsContentUtils.h"
#include "nsEscape.h"
#include "nsAboutProtocolUtils.h"
#include "nsPrintfCString.h"
#include "nsDOMString.h"
#include "nsICacheStorageService.h"
#include "nsICacheStorage.h"
#include "CacheFileUtils.h"
#include "CacheObserver.h"
#include "nsThreadUtils.h"
using namespace mozilla::net;
NS_IMPL_ISUPPORTS(nsAboutCache, nsIAboutModule, nsICacheStorageVisitor)
NS_IMETHODIMP
nsAboutCache::NewChannel(nsIURI* aURI,
nsILoadInfo* aLoadInfo,
nsIChannel** result)
{
NS_ENSURE_ARG_POINTER(aURI);
nsresult rv;
*result = nullptr;
nsCOMPtr<nsIInputStream> inputStream;
rv = NS_NewPipe(getter_AddRefs(inputStream), getter_AddRefs(mStream),
16384, (uint32_t)-1,
true, // non-blocking input
false // blocking output
);
if (NS_FAILED(rv)) return rv;
nsAutoCString storageName;
rv = ParseURI(aURI, storageName);
if (NS_FAILED(rv)) return rv;
mOverview = storageName.IsEmpty();
if (mOverview) {
// ...and visit all we can
mStorageList.AppendElement(NS_LITERAL_CSTRING("memory"));
mStorageList.AppendElement(NS_LITERAL_CSTRING("disk"));
mStorageList.AppendElement(NS_LITERAL_CSTRING("appcache"));
} else {
// ...and visit just the specified storage, entries will output too
mStorageList.AppendElement(storageName);
}
// The entries header is added on encounter of the first entry
mEntriesHeaderAdded = false;
nsCOMPtr<nsIChannel> channel;
// Bug 1087720 (and Bug 1099296):
// Once all callsites have been updated to call NewChannel2()
// instead of NewChannel() we should have a non-null loadInfo
// consistently. Until then we have to branch on the loadInfo.
if (aLoadInfo) {
rv = NS_NewInputStreamChannelInternal(getter_AddRefs(channel),
aURI,
inputStream,
NS_LITERAL_CSTRING("text/html"),
NS_LITERAL_CSTRING("utf-8"),
aLoadInfo);
}
else {
rv = NS_NewInputStreamChannel(getter_AddRefs(channel),
aURI,
inputStream,
nsContentUtils::GetSystemPrincipal(),
nsILoadInfo::SEC_NORMAL,
nsIContentPolicy::TYPE_OTHER,
NS_LITERAL_CSTRING("text/html"),
NS_LITERAL_CSTRING("utf-8"));
}
if (NS_FAILED(rv)) return rv;
mBuffer.AssignLiteral(
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
" <title>Network Cache Storage Information</title>\n"
" <meta charset=\"utf-8\">\n"
" <link rel=\"stylesheet\" href=\"chrome://global/skin/about.css\"/>\n"
" <link rel=\"stylesheet\" href=\"chrome://global/skin/aboutCache.css\"/>\n"
" <script src=\"chrome://global/content/aboutCache.js\"></script>"
"</head>\n"
"<body class=\"aboutPageWideContainer\">\n"
"<h1>Information about the Network Cache Storage Service</h1>\n");
// Add the context switch controls
mBuffer.AppendLiteral(
"<label><input id='priv' type='checkbox'/> Private</label>\n"
"<label><input id='anon' type='checkbox'/> Anonymous</label>\n"
);
if (CacheObserver::UseNewCache()) {
// Visit scoping by browser and appid is not implemented for
// the old cache, simply don't add these controls.
// The appid/inbrowser entries are already mixed in the default
// view anyway.
mBuffer.AppendLiteral(
"<label><input id='appid' type='text' size='6'/> AppID</label>\n"
"<label><input id='inbrowser' type='checkbox'/> In Browser Element</label>\n"
);
}
mBuffer.AppendLiteral(
"<label><input id='submit' type='button' value='Update' onclick='navigate()'/></label>\n"
);
if (!mOverview) {
mBuffer.AppendLiteral("<a href=\"about:cache?storage=&amp;context=");
char* escapedContext = nsEscapeHTML(mContextString.get());
mBuffer.Append(escapedContext);
nsMemory::Free(escapedContext);
mBuffer.AppendLiteral("\">Back to overview</a>");
}
FlushBuffer();
// Kick it, this goes async.
rv = VisitNextStorage();
if (NS_FAILED(rv)) return rv;
channel.forget(result);
return NS_OK;
}
nsresult
nsAboutCache::ParseURI(nsIURI * uri, nsACString & storage)
{
//
// about:cache[?storage=<storage-name>[&context=<context-key>]]
//
nsresult rv;
nsAutoCString path;
rv = uri->GetPath(path);
if (NS_FAILED(rv)) return rv;
mContextString.Truncate();
mLoadInfo = CacheFileUtils::ParseKey(NS_LITERAL_CSTRING(""));
storage.Truncate();
nsACString::const_iterator start, valueStart, end;
path.BeginReading(start);
path.EndReading(end);
valueStart = end;
if (!FindInReadable(NS_LITERAL_CSTRING("?storage="), start, valueStart)) {
return NS_OK;
}
nsACString::const_iterator storageNameBegin = valueStart;
start = valueStart;
valueStart = end;
if (!FindInReadable(NS_LITERAL_CSTRING("&context="), start, valueStart))
start = end;
nsACString::const_iterator storageNameEnd = start;
mContextString = Substring(valueStart, end);
mLoadInfo = CacheFileUtils::ParseKey(mContextString);
storage.Assign(Substring(storageNameBegin, storageNameEnd));
return NS_OK;
}
nsresult
nsAboutCache::VisitNextStorage()
{
if (!mStorageList.Length())
return NS_ERROR_NOT_AVAILABLE;
mStorageName = mStorageList[0];
mStorageList.RemoveElementAt(0);
// Must re-dispatch since we cannot start another visit cycle
// from visitor callback. The cache v1 service doesn't like it.
// TODO - mayhemer, bug 913828, remove this dispatch and call
// directly.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(this, &nsAboutCache::FireVisitStorage);
return NS_DispatchToMainThread(event);
}
void
nsAboutCache::FireVisitStorage()
{
nsresult rv;
rv = VisitStorage(mStorageName);
if (NS_FAILED(rv)) {
if (mLoadInfo) {
char* escaped = nsEscapeHTML(mStorageName.get());
mBuffer.Append(
nsPrintfCString("<p>Unrecognized storage name '%s' in about:cache URL</p>",
escaped));
nsMemory::Free(escaped);
} else {
char* escaped = nsEscapeHTML(mContextString.get());
mBuffer.Append(
nsPrintfCString("<p>Unrecognized context key '%s' in about:cache URL</p>",
escaped));
nsMemory::Free(escaped);
}
FlushBuffer();
// Simulate finish of a visit cycle, this tries the next storage
// or closes the output stream (i.e. the UI loader will stop spinning)
OnCacheEntryVisitCompleted();
}
}
nsresult
nsAboutCache::VisitStorage(nsACString const & storageName)
{
nsresult rv;
rv = GetStorage(storageName, mLoadInfo, getter_AddRefs(mStorage));
if (NS_FAILED(rv)) return rv;
rv = mStorage->AsyncVisitStorage(this, !mOverview);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
//static
nsresult
nsAboutCache::GetStorage(nsACString const & storageName,
nsILoadContextInfo* loadInfo,
nsICacheStorage **storage)
{
nsresult rv;
nsCOMPtr<nsICacheStorageService> cacheService =
do_GetService("@mozilla.org/netwerk/cache-storage-service;1", &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsICacheStorage> cacheStorage;
if (storageName == "disk") {
rv = cacheService->DiskCacheStorage(
loadInfo, false, getter_AddRefs(cacheStorage));
} else if (storageName == "memory") {
rv = cacheService->MemoryCacheStorage(
loadInfo, getter_AddRefs(cacheStorage));
} else if (storageName == "appcache") {
rv = cacheService->AppCacheStorage(
loadInfo, nullptr, getter_AddRefs(cacheStorage));
} else {
rv = NS_ERROR_UNEXPECTED;
}
if (NS_FAILED(rv)) return rv;
cacheStorage.forget(storage);
return NS_OK;
}
NS_IMETHODIMP
nsAboutCache::OnCacheStorageInfo(uint32_t aEntryCount, uint64_t aConsumption,
uint64_t aCapacity, nsIFile * aDirectory)
{
// We need mStream for this
if (!mStream) {
return NS_ERROR_FAILURE;
}
mBuffer.AssignLiteral("<h2>");
mBuffer.Append(mStorageName);
mBuffer.AppendLiteral("</h2>\n"
"<table id=\"");
mBuffer.AppendLiteral("\">\n");
// Write out cache info
// Number of entries
mBuffer.AppendLiteral(" <tr>\n"
" <th>Number of entries:</th>\n"
" <td>");
mBuffer.AppendInt(aEntryCount);
mBuffer.AppendLiteral("</td>\n"
" </tr>\n");
// Maximum storage size
mBuffer.AppendLiteral(" <tr>\n"
" <th>Maximum storage size:</th>\n"
" <td>");
mBuffer.AppendInt(aCapacity / 1024);
mBuffer.AppendLiteral(" KiB</td>\n"
" </tr>\n");
// Storage in use
mBuffer.AppendLiteral(" <tr>\n"
" <th>Storage in use:</th>\n"
" <td>");
mBuffer.AppendInt(aConsumption / 1024);
mBuffer.AppendLiteral(" KiB</td>\n"
" </tr>\n");
// Storage disk location
mBuffer.AppendLiteral(" <tr>\n"
" <th>Storage disk location:</th>\n"
" <td>");
if (aDirectory) {
nsAutoString path;
aDirectory->GetPath(path);
mBuffer.Append(NS_ConvertUTF16toUTF8(path));
} else {
mBuffer.AppendLiteral("none, only stored in memory");
}
mBuffer.AppendLiteral(" </td>\n"
" </tr>\n");
if (mOverview) { // The about:cache case
if (aEntryCount != 0) { // Add the "List Cache Entries" link
mBuffer.AppendLiteral(" <tr>\n"
" <th><a href=\"about:cache?storage=");
mBuffer.Append(mStorageName);
mBuffer.AppendLiteral("&amp;context=");
char* escapedContext = nsEscapeHTML(mContextString.get());
mBuffer.Append(escapedContext);
nsMemory::Free(escapedContext);
mBuffer.AppendLiteral("\">List Cache Entries</a></th>\n"
" </tr>\n");
}
}
mBuffer.AppendLiteral("</table>\n");
// The entries header is added on encounter of the first entry
mEntriesHeaderAdded = false;
FlushBuffer();
if (mOverview) {
// OnCacheEntryVisitCompleted() is not called when we do not iterate
// cache entries. Since this moves forward to the next storage in
// the list we want to visit, artificially call it here.
OnCacheEntryVisitCompleted();
}
return NS_OK;
}
NS_IMETHODIMP
nsAboutCache::OnCacheEntryInfo(nsIURI *aURI, const nsACString & aIdEnhance,
int64_t aDataSize, int32_t aFetchCount,
uint32_t aLastModified, uint32_t aExpirationTime)
{
// We need mStream for this
if (!mStream) {
return NS_ERROR_FAILURE;
}
if (!mEntriesHeaderAdded) {
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 Modifed</th>\n"
" <th>Expires</th>\n"
" </tr>\n"
" </thead>\n");
mEntriesHeaderAdded = true;
}
// Generate a about:cache-entry URL for this entry...
nsAutoCString url;
url.AssignLiteral("about:cache-entry?storage=");
url.Append(mStorageName);
url.AppendLiteral("&amp;context=");
char* escapedContext = nsEscapeHTML(mContextString.get());
url += escapedContext;
nsMemory::Free(escapedContext);
url.AppendLiteral("&amp;eid=");
char* escapedEID = nsEscapeHTML(aIdEnhance.BeginReading());
url += escapedEID;
nsMemory::Free(escapedEID);
nsAutoCString cacheUriSpec;
aURI->GetAsciiSpec(cacheUriSpec);
char* escapedCacheURI = nsEscapeHTML(cacheUriSpec.get());
url.AppendLiteral("&amp;uri=");
url += escapedCacheURI;
// Entry start...
mBuffer.AppendLiteral(" <tr>\n");
// URI
mBuffer.AppendLiteral(" <td><a href=\"");
mBuffer.Append(url);
mBuffer.AppendLiteral("\">");
if (!aIdEnhance.IsEmpty()) {
mBuffer.Append(aIdEnhance);
mBuffer.Append(':');
}
mBuffer.Append(escapedCacheURI);
mBuffer.AppendLiteral("</a></td>\n");
nsMemory::Free(escapedCacheURI);
// Content length
mBuffer.AppendLiteral(" <td>");
mBuffer.AppendInt(aDataSize);
mBuffer.AppendLiteral(" bytes</td>\n");
// Number of accesses
mBuffer.AppendLiteral(" <td>");
mBuffer.AppendInt(aFetchCount);
mBuffer.AppendLiteral("</td>\n");
// vars for reporting time
char buf[255];
// Last modified time
mBuffer.AppendLiteral(" <td>");
if (aLastModified) {
PrintTimeString(buf, sizeof(buf), aLastModified);
mBuffer.Append(buf);
} else {
mBuffer.AppendLiteral("No last modified time (bug 1000338)");
}
mBuffer.AppendLiteral("</td>\n");
// Expires time
mBuffer.AppendLiteral(" <td>");
if (aExpirationTime < 0xFFFFFFFF) {
PrintTimeString(buf, sizeof(buf), aExpirationTime);
mBuffer.Append(buf);
} else {
mBuffer.AppendLiteral("No expiration time");
}
mBuffer.AppendLiteral("</td>\n");
// Entry is done...
mBuffer.AppendLiteral(" </tr>\n");
FlushBuffer();
return NS_OK;
}
NS_IMETHODIMP
nsAboutCache::OnCacheEntryVisitCompleted()
{
if (!mStream) {
return NS_ERROR_FAILURE;
}
if (mEntriesHeaderAdded) {
mBuffer.AppendLiteral("</table>\n");
}
// Kick another storage visiting (from a storage that allows us.)
while (mStorageList.Length()) {
nsresult rv = VisitNextStorage();
if (NS_SUCCEEDED(rv)) {
// Expecting new round of OnCache* calls.
return NS_OK;
}
}
// We are done!
mBuffer.AppendLiteral("</body>\n"
"</html>\n");
FlushBuffer();
mStream->Close();
return NS_OK;
}
void
nsAboutCache::FlushBuffer()
{
uint32_t bytesWritten;
mStream->Write(mBuffer.get(), mBuffer.Length(), &bytesWritten);
mBuffer.Truncate();
}
NS_IMETHODIMP
nsAboutCache::GetURIFlags(nsIURI *aURI, uint32_t *result)
{
*result = 0;
return NS_OK;
}
NS_IMETHODIMP
nsAboutCache::GetIndexedDBOriginPostfix(nsIURI *aURI, nsAString &result)
{
SetDOMStringToNull(result);
return NS_ERROR_NOT_IMPLEMENTED;
}
// static
nsresult
nsAboutCache::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
{
nsAboutCache* about = new nsAboutCache();
if (about == nullptr)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(about);
nsresult rv = about->QueryInterface(aIID, aResult);
NS_RELEASE(about);
return rv;
}
////////////////////////////////////////////////////////////////////////////////
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