gecko-dev/modules/libjar/nsJARProtocolHandler.cpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include "nsJARProtocolHandler.h"
#include "nsIIOService.h"
#include "nsCRT.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsJARURI.h"
#include "nsIURL.h"
#include "nsJARChannel.h"
#include "nsXPIDLString.h"
#include "nsString.h"
#include "nsNetCID.h"
#include "nsCExternalHandlerService.h"
#include "nsIMIMEService.h"
#include "nsMimeTypes.h"

static NS_DEFINE_CID(kZipReaderCacheCID, NS_ZIPREADERCACHE_CID);

#define NS_JAR_CACHE_SIZE       32

////////////////////////////////////////////////////////////////////////////////

nsJARProtocolHandler::nsJARProtocolHandler()
{
    NS_INIT_REFCNT();
}

nsresult
nsJARProtocolHandler::Init()
{
    nsresult rv;
    rv = nsComponentManager::CreateInstance(kZipReaderCacheCID,
                                            nsnull,
                                            NS_GET_IID(nsIZipReaderCache),
                                            getter_AddRefs(mJARCache));
    if (NS_FAILED(rv)) return rv;

    rv = mJARCache->Init(NS_JAR_CACHE_SIZE);
    return rv;
}

nsIMIMEService* 
nsJARProtocolHandler::GetCachedMimeService()
{
    if (!mMimeService) {
        mMimeService = do_GetService(NS_MIMESERVICE_CONTRACTID);
    }
    return mMimeService.get();
}

nsJARProtocolHandler::~nsJARProtocolHandler()
{
}

NS_IMPL_THREADSAFE_ISUPPORTS3(nsJARProtocolHandler,
                              nsIJARProtocolHandler,
                              nsIProtocolHandler,
                              nsISupportsWeakReference)

NS_METHOD
nsJARProtocolHandler::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
{
    if (aOuter)
        return NS_ERROR_NO_AGGREGATION;

    nsJARProtocolHandler* ph = new nsJARProtocolHandler();
    if (ph == nsnull)
        return NS_ERROR_OUT_OF_MEMORY;
    NS_ADDREF(ph);
    nsresult rv = ph->Init();
    if (NS_SUCCEEDED(rv)) {
        rv = ph->QueryInterface(aIID, aResult);
    }
    NS_RELEASE(ph);
    return rv;
}

NS_IMETHODIMP
nsJARProtocolHandler::GetJARCache(nsIZipReaderCache* *result)
{
    *result = mJARCache;
    NS_ADDREF(*result);
    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////
// nsIProtocolHandler methods:

NS_IMETHODIMP
nsJARProtocolHandler::GetScheme(nsACString &result)
{
    result = "jar";
    return NS_OK;
}

NS_IMETHODIMP
nsJARProtocolHandler::GetDefaultPort(PRInt32 *result)
{
    *result = -1;        // no port for JAR: URLs
    return NS_OK;
}

NS_IMETHODIMP
nsJARProtocolHandler::GetProtocolFlags(PRUint32 *result)
{
    *result = URI_NORELATIVE | URI_NOAUTH;
    /* Although jar uris have their own concept of relative urls
       it is very different from the standard behaviour, so we
       have to say norelative here! */
    return NS_OK;
}

NS_IMETHODIMP
nsJARProtocolHandler::NewURI(const nsACString &aSpec,
                             const char *aCharset,
                             nsIURI *aBaseURI,
                             nsIURI **result)
{
    nsresult rv = NS_OK;
    nsIURI* url;

    nsJARURI *jarURI = new nsJARURI();
    if (!jarURI)
        return NS_ERROR_OUT_OF_MEMORY;

    NS_ADDREF(url = jarURI);

    rv = jarURI->Init(aCharset);
    if (NS_FAILED(rv)) {
        NS_RELEASE(url);
        return rv;
    }

    if (aBaseURI) {
        nsCAutoString aResolvedURI;
        rv = aBaseURI->Resolve(aSpec, aResolvedURI);
        if (NS_FAILED(rv)) return rv;
        rv = url->SetSpec(aResolvedURI);
    }
    else
        rv = url->SetSpec(aSpec);

    if (NS_FAILED(rv)) {
        NS_RELEASE(url);
        return rv;
    }

    *result = url;
    return rv;
}

NS_IMETHODIMP
nsJARProtocolHandler::NewChannel(nsIURI* uri, nsIChannel* *result)
{
    nsresult rv;

    nsJARChannel* channel;
    rv = nsJARChannel::Create(nsnull, NS_GET_IID(nsIJARChannel), (void**)&channel);
    if (NS_FAILED(rv)) return rv;

    rv = channel->Init(this, uri);
    if (NS_FAILED(rv)) {
        NS_RELEASE(channel);
        return rv;
    }

    *result = channel;
    return NS_OK;
}


NS_IMETHODIMP
nsJARProtocolHandler::AllowPort(PRInt32 port, const char *scheme, PRBool *_retval)
{
    // don't override anything.
    *_retval = PR_FALSE;
    return NS_OK;
}

////////////////////////////////////////////////////////////////////////////////