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gecko-dev/netwerk/protocol/ftp/nsFtpProtocolHandler.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/.
*
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 03/27/2000 IBM Corp. Added PR_CALLBACK for Optlink
* use in OS2
*/
#include "mozilla/net/NeckoChild.h"
#include "mozilla/net/FTPChannelChild.h"
using namespace mozilla;
using namespace mozilla::net;
#include "nsFtpProtocolHandler.h"
#include "nsFTPChannel.h"
#include "nsIStandardURL.h"
#include "mozilla/Logging.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsIObserverService.h"
#include "nsEscape.h"
#include "nsAlgorithm.h"
//-----------------------------------------------------------------------------
//
// Log module for FTP Protocol logging...
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsFtp:5
// set NSPR_LOG_FILE=nspr.log
//
// this enables LogLevel::Debug level information and places all output in
// the file nspr.log
//
PRLogModuleInfo* gFTPLog = nullptr;
#undef LOG
#define LOG(args) MOZ_LOG(gFTPLog, mozilla::LogLevel::Debug, args)
//-----------------------------------------------------------------------------
#define IDLE_TIMEOUT_PREF "network.ftp.idleConnectionTimeout"
#define IDLE_CONNECTION_LIMIT 8 /* TODO pref me */
#define QOS_DATA_PREF "network.ftp.data.qos"
#define QOS_CONTROL_PREF "network.ftp.control.qos"
nsFtpProtocolHandler *gFtpHandler = nullptr;
//-----------------------------------------------------------------------------
nsFtpProtocolHandler::nsFtpProtocolHandler()
: mIdleTimeout(-1)
, mSessionId(0)
, mControlQoSBits(0x00)
, mDataQoSBits(0x00)
{
if (!gFTPLog)
gFTPLog = PR_NewLogModule("nsFtp");
LOG(("FTP:creating handler @%x\n", this));
gFtpHandler = this;
}
nsFtpProtocolHandler::~nsFtpProtocolHandler()
{
LOG(("FTP:destroying handler @%x\n", this));
NS_ASSERTION(mRootConnectionList.Length() == 0, "why wasn't Observe called?");
gFtpHandler = nullptr;
}
NS_IMPL_ISUPPORTS(nsFtpProtocolHandler,
nsIProtocolHandler,
nsIProxiedProtocolHandler,
nsIObserver,
nsISupportsWeakReference)
nsresult
nsFtpProtocolHandler::Init()
{
if (IsNeckoChild())
NeckoChild::InitNeckoChild();
if (mIdleTimeout == -1) {
nsresult rv;
nsCOMPtr<nsIPrefBranch> branch = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
rv = branch->GetIntPref(IDLE_TIMEOUT_PREF, &mIdleTimeout);
if (NS_FAILED(rv))
mIdleTimeout = 5*60; // 5 minute default
rv = branch->AddObserver(IDLE_TIMEOUT_PREF, this, true);
if (NS_FAILED(rv)) return rv;
int32_t val;
rv = branch->GetIntPref(QOS_DATA_PREF, &val);
if (NS_SUCCEEDED(rv))
mDataQoSBits = (uint8_t) clamped(val, 0, 0xff);
rv = branch->AddObserver(QOS_DATA_PREF, this, true);
if (NS_FAILED(rv)) return rv;
rv = branch->GetIntPref(QOS_CONTROL_PREF, &val);
if (NS_SUCCEEDED(rv))
mControlQoSBits = (uint8_t) clamped(val, 0, 0xff);
rv = branch->AddObserver(QOS_CONTROL_PREF, this, true);
if (NS_FAILED(rv)) return rv;
}
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(this,
"network:offline-about-to-go-offline",
true);
observerService->AddObserver(this,
"net:clear-active-logins",
true);
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsIProtocolHandler methods:
NS_IMETHODIMP
nsFtpProtocolHandler::GetScheme(nsACString &result)
{
result.AssignLiteral("ftp");
return NS_OK;
}
NS_IMETHODIMP
nsFtpProtocolHandler::GetDefaultPort(int32_t *result)
{
*result = 21;
return NS_OK;
}
NS_IMETHODIMP
nsFtpProtocolHandler::GetProtocolFlags(uint32_t *result)
{
*result = URI_STD | ALLOWS_PROXY | ALLOWS_PROXY_HTTP |
URI_LOADABLE_BY_ANYONE;
return NS_OK;
}
NS_IMETHODIMP
nsFtpProtocolHandler::NewURI(const nsACString &aSpec,
const char *aCharset,
nsIURI *aBaseURI,
nsIURI **result)
{
nsAutoCString spec(aSpec);
spec.Trim(" \t\n\r"); // Match NS_IsAsciiWhitespace instead of HTML5
char *fwdPtr = spec.BeginWriting();
// now unescape it... %xx reduced inline to resulting character
int32_t len = NS_UnescapeURL(fwdPtr);
// NS_UnescapeURL() modified spec's buffer, truncate to ensure
// spec knows its new length.
spec.Truncate(len);
// return an error if we find a NUL, CR, or LF in the path
if (spec.FindCharInSet(CRLF) >= 0 || spec.FindChar('\0') >= 0)
return NS_ERROR_MALFORMED_URI;
nsresult rv;
nsCOMPtr<nsIStandardURL> url = do_CreateInstance(NS_STANDARDURL_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
rv = url->Init(nsIStandardURL::URLTYPE_AUTHORITY, 21, aSpec, aCharset, aBaseURI);
if (NS_FAILED(rv)) return rv;
return CallQueryInterface(url, result);
}
NS_IMETHODIMP
nsFtpProtocolHandler::NewChannel2(nsIURI* url,
nsILoadInfo* aLoadInfo,
nsIChannel** result)
{
return NewProxiedChannel2(url, nullptr, 0, nullptr, aLoadInfo, result);
}
NS_IMETHODIMP
nsFtpProtocolHandler::NewChannel(nsIURI* url, nsIChannel* *result)
{
return NewChannel2(url, nullptr, result);
}
NS_IMETHODIMP
nsFtpProtocolHandler::NewProxiedChannel2(nsIURI* uri, nsIProxyInfo* proxyInfo,
uint32_t proxyResolveFlags,
nsIURI *proxyURI,
nsILoadInfo* aLoadInfo,
nsIChannel* *result)
{
NS_ENSURE_ARG_POINTER(uri);
nsRefPtr<nsBaseChannel> channel;
if (IsNeckoChild())
channel = new FTPChannelChild(uri);
else
channel = new nsFtpChannel(uri, proxyInfo);
nsresult rv = channel->Init();
if (NS_FAILED(rv)) {
return rv;
}
// set the loadInfo on the new channel
rv = channel->SetLoadInfo(aLoadInfo);
if (NS_FAILED(rv)) {
return rv;
}
channel.forget(result);
return rv;
}
NS_IMETHODIMP
nsFtpProtocolHandler::NewProxiedChannel(nsIURI* uri, nsIProxyInfo* proxyInfo,
uint32_t proxyResolveFlags,
nsIURI *proxyURI,
nsIChannel* *result)
{
return NewProxiedChannel2(uri, proxyInfo, proxyResolveFlags,
proxyURI, nullptr /*loadinfo*/,
result);
}
NS_IMETHODIMP
nsFtpProtocolHandler::AllowPort(int32_t port, const char *scheme, bool *_retval)
{
*_retval = (port == 21 || port == 22);
return NS_OK;
}
// connection cache methods
void
nsFtpProtocolHandler::Timeout(nsITimer *aTimer, void *aClosure)
{
LOG(("FTP:timeout reached for %p\n", aClosure));
bool found = gFtpHandler->mRootConnectionList.RemoveElement(aClosure);
if (!found) {
NS_ERROR("timerStruct not found");
return;
}
timerStruct* s = (timerStruct*)aClosure;
delete s;
}
nsresult
nsFtpProtocolHandler::RemoveConnection(nsIURI *aKey, nsFtpControlConnection* *_retval)
{
NS_ASSERTION(_retval, "null pointer");
NS_ASSERTION(aKey, "null pointer");
*_retval = nullptr;
nsAutoCString spec;
aKey->GetPrePath(spec);
LOG(("FTP:removing connection for %s\n", spec.get()));
timerStruct* ts = nullptr;
uint32_t i;
bool found = false;
for (i=0;i<mRootConnectionList.Length();++i) {
ts = mRootConnectionList[i];
if (strcmp(spec.get(), ts->key) == 0) {
found = true;
mRootConnectionList.RemoveElementAt(i);
break;
}
}
if (!found)
return NS_ERROR_FAILURE;
// swap connection ownership
*_retval = ts->conn;
ts->conn = nullptr;
delete ts;
return NS_OK;
}
nsresult
nsFtpProtocolHandler::InsertConnection(nsIURI *aKey, nsFtpControlConnection *aConn)
{
NS_ASSERTION(aConn, "null pointer");
NS_ASSERTION(aKey, "null pointer");
if (aConn->mSessionId != mSessionId)
return NS_ERROR_FAILURE;
nsAutoCString spec;
aKey->GetPrePath(spec);
LOG(("FTP:inserting connection for %s\n", spec.get()));
nsresult rv;
nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1", &rv);
if (NS_FAILED(rv)) return rv;
timerStruct* ts = new timerStruct();
if (!ts)
return NS_ERROR_OUT_OF_MEMORY;
rv = timer->InitWithFuncCallback(nsFtpProtocolHandler::Timeout,
ts,
mIdleTimeout*1000,
nsITimer::TYPE_REPEATING_SLACK);
if (NS_FAILED(rv)) {
delete ts;
return rv;
}
ts->key = ToNewCString(spec);
if (!ts->key) {
delete ts;
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(aConn);
ts->conn = aConn;
ts->timer = timer;
//
// limit number of idle connections. if limit is reached, then prune
// eldest connection with matching key. if none matching, then prune
// eldest connection.
//
if (mRootConnectionList.Length() == IDLE_CONNECTION_LIMIT) {
uint32_t i;
for (i=0;i<mRootConnectionList.Length();++i) {
timerStruct *candidate = mRootConnectionList[i];
if (strcmp(candidate->key, ts->key) == 0) {
mRootConnectionList.RemoveElementAt(i);
delete candidate;
break;
}
}
if (mRootConnectionList.Length() == IDLE_CONNECTION_LIMIT) {
timerStruct *eldest = mRootConnectionList[0];
mRootConnectionList.RemoveElementAt(0);
delete eldest;
}
}
mRootConnectionList.AppendElement(ts);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsIObserver
NS_IMETHODIMP
nsFtpProtocolHandler::Observe(nsISupports *aSubject,
const char *aTopic,
const char16_t *aData)
{
LOG(("FTP:observing [%s]\n", aTopic));
if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
nsCOMPtr<nsIPrefBranch> branch = do_QueryInterface(aSubject);
if (!branch) {
NS_ERROR("no prefbranch");
return NS_ERROR_UNEXPECTED;
}
int32_t val;
nsresult rv = branch->GetIntPref(IDLE_TIMEOUT_PREF, &val);
if (NS_SUCCEEDED(rv))
mIdleTimeout = val;
rv = branch->GetIntPref(QOS_DATA_PREF, &val);
if (NS_SUCCEEDED(rv))
mDataQoSBits = (uint8_t) clamped(val, 0, 0xff);
rv = branch->GetIntPref(QOS_CONTROL_PREF, &val);
if (NS_SUCCEEDED(rv))
mControlQoSBits = (uint8_t) clamped(val, 0, 0xff);
} else if (!strcmp(aTopic, "network:offline-about-to-go-offline")) {
ClearAllConnections();
} else if (!strcmp(aTopic, "net:clear-active-logins")) {
ClearAllConnections();
mSessionId++;
} else {
NS_NOTREACHED("unexpected topic");
}
return NS_OK;
}
void
nsFtpProtocolHandler::ClearAllConnections()
{
uint32_t i;
for (i=0;i<mRootConnectionList.Length();++i)
delete mRootConnectionList[i];
mRootConnectionList.Clear();
}
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