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/* 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 "nsCOMPtr.h"
#include "nsIInputStream.h"
#include "nsIStringStream.h"
#include "nsNetUtil.h"
#include "nsIFileURL.h"
#include "nsIJARURI.h"
#include "nsIResProtocolHandler.h"
#include "nsIChromeRegistry.h"
#include "nsAutoPtr.h"
#include "StartupCacheUtils.h"
#include "mozilla/scache/StartupCache.h"
#include "mozilla/Omnijar.h"
namespace mozilla {
namespace scache {
NS_EXPORT nsresult
NewObjectInputStreamFromBuffer(UniquePtr<char[]> buffer, uint32_t len,
nsIObjectInputStream** stream)
{
nsCOMPtr<nsIStringInputStream> stringStream =
do_CreateInstance("@mozilla.org/io/string-input-stream;1");
NS_ENSURE_TRUE(stringStream, NS_ERROR_FAILURE);
nsCOMPtr<nsIObjectInputStream> objectInput =
do_CreateInstance("@mozilla.org/binaryinputstream;1");
NS_ENSURE_TRUE(objectInput, NS_ERROR_FAILURE);
stringStream->AdoptData(buffer.release(), len);
objectInput->SetInputStream(stringStream);
objectInput.forget(stream);
return NS_OK;
}
NS_EXPORT nsresult
NewObjectOutputWrappedStorageStream(nsIObjectOutputStream **wrapperStream,
nsIStorageStream** stream,
bool wantDebugStream)
{
nsCOMPtr<nsIStorageStream> storageStream;
nsresult rv = NS_NewStorageStream(256, UINT32_MAX, getter_AddRefs(storageStream));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIObjectOutputStream> objectOutput
= do_CreateInstance("@mozilla.org/binaryoutputstream;1");
nsCOMPtr<nsIOutputStream> outputStream
= do_QueryInterface(storageStream);
objectOutput->SetOutputStream(outputStream);
#ifdef DEBUG
if (wantDebugStream) {
// Wrap in debug stream to detect unsupported writes of
// multiply-referenced non-singleton objects
StartupCache* sc = StartupCache::GetSingleton();
NS_ENSURE_TRUE(sc, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIObjectOutputStream> debugStream;
sc->GetDebugObjectOutputStream(objectOutput, getter_AddRefs(debugStream));
debugStream.forget(wrapperStream);
} else {
objectOutput.forget(wrapperStream);
}
#else
objectOutput.forget(wrapperStream);
#endif
storageStream.forget(stream);
return NS_OK;
}
NS_EXPORT nsresult
NewBufferFromStorageStream(nsIStorageStream *storageStream,
UniquePtr<char[]>* buffer, uint32_t* len)
{
nsresult rv;
nsCOMPtr<nsIInputStream> inputStream;
rv = storageStream->NewInputStream(0, getter_AddRefs(inputStream));
NS_ENSURE_SUCCESS(rv, rv);
uint64_t avail64;
rv = inputStream->Available(&avail64);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(avail64 <= UINT32_MAX, NS_ERROR_FILE_TOO_BIG);
uint32_t avail = (uint32_t)avail64;
auto temp = MakeUnique<char[]>(avail);
uint32_t read;
rv = inputStream->Read(temp.get(), avail, &read);
if (NS_SUCCEEDED(rv) && avail != read)
rv = NS_ERROR_UNEXPECTED;
if (NS_FAILED(rv)) {
return rv;
}
*len = avail;
*buffer = Move(temp);
return NS_OK;
}
static const char baseName[2][5] = { "gre/", "app/" };
static inline bool
canonicalizeBase(nsAutoCString &spec,
nsACString &out)
{
nsAutoCString greBase, appBase;
nsresult rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::GRE, greBase);
if (NS_FAILED(rv) || !greBase.Length())
return false;
rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::APP, appBase);
if (NS_FAILED(rv))
return false;
bool underGre = !greBase.Compare(spec.get(), false, greBase.Length());
bool underApp = appBase.Length() &&
!appBase.Compare(spec.get(), false, appBase.Length());
if (!underGre && !underApp)
return false;
/**
* At this point, if both underGre and underApp are true, it can be one
* of the two following cases:
* - the GRE directory points to a subdirectory of the APP directory,
* meaning spec points under GRE.
* - the APP directory points to a subdirectory of the GRE directory,
* meaning spec points under APP.
* Checking the GRE and APP path length is enough to know in which case
* we are.
*/
if (underGre && underApp && greBase.Length() < appBase.Length())
underGre = false;
out.AppendLiteral("/resource/");
out.Append(baseName[underGre ? mozilla::Omnijar::GRE : mozilla::Omnijar::APP]);
out.Append(Substring(spec, underGre ? greBase.Length() : appBase.Length()));
return true;
}
/**
* PathifyURI transforms uris into useful zip paths
* to make it easier to manipulate startup cache entries
* using standard zip tools.
* Transformations applied:
* * resource:// URIs are resolved to their corresponding file/jar URI to
* canonicalize resources URIs other than gre and app.
* * Paths under GRE or APP directory have their base path replaced with
* resource/gre or resource/app to avoid depending on install location.
* * jar:file:///path/to/file.jar!/sub/path urls are replaced with
* /path/to/file.jar/sub/path
*
* The result is appended to the string passed in. Adding a prefix before
* calling is recommended to avoid colliding with other cache users.
*
* For example, in the js loader (string is prefixed with jsloader by caller):
* resource://gre/modules/XPCOMUtils.jsm or
* file://$GRE_DIR/modules/XPCOMUtils.jsm or
* jar:file://$GRE_DIR/omni.jar!/modules/XPCOMUtils.jsm becomes
* jsloader/resource/gre/modules/XPCOMUtils.jsm
* file://$PROFILE_DIR/extensions/{uuid}/components/component.js becomes
* jsloader/$PROFILE_DIR/extensions/%7Buuid%7D/components/component.js
* jar:file://$PROFILE_DIR/extensions/some.xpi!/components/component.js becomes
* jsloader/$PROFILE_DIR/extensions/some.xpi/components/component.js
*/
NS_EXPORT nsresult
PathifyURI(nsIURI *in, nsACString &out)
{
bool equals;
nsresult rv;
nsCOMPtr<nsIURI> uri = in;
nsAutoCString spec;
// Resolve resource:// URIs. At the end of this if/else block, we
// have both spec and uri variables identifying the same URI.
if (NS_SUCCEEDED(in->SchemeIs("resource", &equals)) && equals) {
nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIProtocolHandler> ph;
rv = ioService->GetProtocolHandler("resource", getter_AddRefs(ph));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIResProtocolHandler> irph(do_QueryInterface(ph, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = irph->ResolveURI(in, spec);
NS_ENSURE_SUCCESS(rv, rv);
rv = ioService->NewURI(spec, nullptr, nullptr, getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
} else {
if (NS_SUCCEEDED(in->SchemeIs("chrome", &equals)) && equals) {
nsCOMPtr<nsIChromeRegistry> chromeReg =
mozilla::services::GetChromeRegistryService();
if (!chromeReg)
return NS_ERROR_UNEXPECTED;
rv = chromeReg->ConvertChromeURL(in, getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
}
rv = uri->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!canonicalizeBase(spec, out)) {
if (NS_SUCCEEDED(uri->SchemeIs("file", &equals)) && equals) {
nsCOMPtr<nsIFileURL> baseFileURL;
baseFileURL = do_QueryInterface(uri, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString path;
rv = baseFileURL->GetPath(path);
NS_ENSURE_SUCCESS(rv, rv);
out.Append(path);
} else if (NS_SUCCEEDED(uri->SchemeIs("jar", &equals)) && equals) {
nsCOMPtr<nsIJARURI> jarURI = do_QueryInterface(uri, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> jarFileURI;
rv = jarURI->GetJARFile(getter_AddRefs(jarFileURI));
NS_ENSURE_SUCCESS(rv, rv);
rv = PathifyURI(jarFileURI, out);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString path;
rv = jarURI->GetJAREntry(path);
NS_ENSURE_SUCCESS(rv, rv);
out.Append('/');
out.Append(path);
} else { // Very unlikely
rv = uri->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
out.Append('/');
out.Append(spec);
}
}
return NS_OK;
}
} // namespace scache
} // namespace mozilla