mirror of
https://github.com/mozilla/gecko-dev.git
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f49b2c8d86
Similar to the previous change to NewObjectInputStreamFromBuffer, we want to make the ownership transfer out of NewBufferFromStorageStream more obvious. Doing this also lets us get rid of some uses of nsAutoArrayPtr, which is less idiomatic than UniquePtr.
252 lines
8.3 KiB
C++
252 lines
8.3 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsCOMPtr.h"
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#include "nsIInputStream.h"
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#include "nsIStringStream.h"
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#include "nsNetUtil.h"
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#include "nsIFileURL.h"
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#include "nsIJARURI.h"
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#include "nsIResProtocolHandler.h"
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#include "nsIChromeRegistry.h"
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#include "nsAutoPtr.h"
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#include "StartupCacheUtils.h"
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#include "mozilla/scache/StartupCache.h"
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#include "mozilla/Omnijar.h"
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namespace mozilla {
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namespace scache {
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NS_EXPORT nsresult
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NewObjectInputStreamFromBuffer(UniquePtr<char[]> buffer, uint32_t len,
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nsIObjectInputStream** stream)
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{
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nsCOMPtr<nsIStringInputStream> stringStream
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= do_CreateInstance("@mozilla.org/io/string-input-stream;1");
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nsCOMPtr<nsIObjectInputStream> objectInput
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= do_CreateInstance("@mozilla.org/binaryinputstream;1");
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stringStream->AdoptData(buffer.release(), len);
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objectInput->SetInputStream(stringStream);
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objectInput.forget(stream);
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return NS_OK;
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}
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NS_EXPORT nsresult
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NewObjectOutputWrappedStorageStream(nsIObjectOutputStream **wrapperStream,
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nsIStorageStream** stream,
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bool wantDebugStream)
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{
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nsCOMPtr<nsIStorageStream> storageStream;
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nsresult rv = NS_NewStorageStream(256, UINT32_MAX, getter_AddRefs(storageStream));
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIObjectOutputStream> objectOutput
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= do_CreateInstance("@mozilla.org/binaryoutputstream;1");
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nsCOMPtr<nsIOutputStream> outputStream
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= do_QueryInterface(storageStream);
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objectOutput->SetOutputStream(outputStream);
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#ifdef DEBUG
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if (wantDebugStream) {
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// Wrap in debug stream to detect unsupported writes of
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// multiply-referenced non-singleton objects
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StartupCache* sc = StartupCache::GetSingleton();
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NS_ENSURE_TRUE(sc, NS_ERROR_UNEXPECTED);
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nsCOMPtr<nsIObjectOutputStream> debugStream;
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sc->GetDebugObjectOutputStream(objectOutput, getter_AddRefs(debugStream));
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debugStream.forget(wrapperStream);
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} else {
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objectOutput.forget(wrapperStream);
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}
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#else
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objectOutput.forget(wrapperStream);
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#endif
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storageStream.forget(stream);
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return NS_OK;
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}
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NS_EXPORT nsresult
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NewBufferFromStorageStream(nsIStorageStream *storageStream,
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UniquePtr<char[]>* buffer, uint32_t* len)
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{
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nsresult rv;
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nsCOMPtr<nsIInputStream> inputStream;
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rv = storageStream->NewInputStream(0, getter_AddRefs(inputStream));
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NS_ENSURE_SUCCESS(rv, rv);
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uint64_t avail64;
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rv = inputStream->Available(&avail64);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(avail64 <= UINT32_MAX, NS_ERROR_FILE_TOO_BIG);
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uint32_t avail = (uint32_t)avail64;
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auto temp = MakeUnique<char[]>(avail);
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uint32_t read;
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rv = inputStream->Read(temp.get(), avail, &read);
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if (NS_SUCCEEDED(rv) && avail != read)
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rv = NS_ERROR_UNEXPECTED;
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if (NS_FAILED(rv)) {
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return rv;
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}
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*len = avail;
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*buffer = Move(temp);
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return NS_OK;
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}
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static const char baseName[2][5] = { "gre/", "app/" };
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static inline bool
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canonicalizeBase(nsAutoCString &spec,
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nsACString &out)
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{
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nsAutoCString greBase, appBase;
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nsresult rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::GRE, greBase);
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if (NS_FAILED(rv) || !greBase.Length())
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return false;
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rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::APP, appBase);
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if (NS_FAILED(rv))
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return false;
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bool underGre = !greBase.Compare(spec.get(), false, greBase.Length());
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bool underApp = appBase.Length() &&
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!appBase.Compare(spec.get(), false, appBase.Length());
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if (!underGre && !underApp)
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return false;
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/**
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* At this point, if both underGre and underApp are true, it can be one
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* of the two following cases:
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* - the GRE directory points to a subdirectory of the APP directory,
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* meaning spec points under GRE.
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* - the APP directory points to a subdirectory of the GRE directory,
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* meaning spec points under APP.
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* Checking the GRE and APP path length is enough to know in which case
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* we are.
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*/
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if (underGre && underApp && greBase.Length() < appBase.Length())
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underGre = false;
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out.AppendLiteral("/resource/");
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out.Append(baseName[underGre ? mozilla::Omnijar::GRE : mozilla::Omnijar::APP]);
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out.Append(Substring(spec, underGre ? greBase.Length() : appBase.Length()));
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return true;
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}
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/**
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* PathifyURI transforms uris into useful zip paths
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* to make it easier to manipulate startup cache entries
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* using standard zip tools.
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* Transformations applied:
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* * resource:// URIs are resolved to their corresponding file/jar URI to
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* canonicalize resources URIs other than gre and app.
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* * Paths under GRE or APP directory have their base path replaced with
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* resource/gre or resource/app to avoid depending on install location.
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* * jar:file:///path/to/file.jar!/sub/path urls are replaced with
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* /path/to/file.jar/sub/path
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*
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* The result is appended to the string passed in. Adding a prefix before
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* calling is recommended to avoid colliding with other cache users.
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*
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* For example, in the js loader (string is prefixed with jsloader by caller):
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* resource://gre/modules/XPCOMUtils.jsm or
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* file://$GRE_DIR/modules/XPCOMUtils.jsm or
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* jar:file://$GRE_DIR/omni.jar!/modules/XPCOMUtils.jsm becomes
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* jsloader/resource/gre/modules/XPCOMUtils.jsm
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* file://$PROFILE_DIR/extensions/{uuid}/components/component.js becomes
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* jsloader/$PROFILE_DIR/extensions/%7Buuid%7D/components/component.js
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* jar:file://$PROFILE_DIR/extensions/some.xpi!/components/component.js becomes
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* jsloader/$PROFILE_DIR/extensions/some.xpi/components/component.js
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*/
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NS_EXPORT nsresult
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PathifyURI(nsIURI *in, nsACString &out)
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{
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bool equals;
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nsresult rv;
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nsCOMPtr<nsIURI> uri = in;
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nsAutoCString spec;
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// Resolve resource:// URIs. At the end of this if/else block, we
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// have both spec and uri variables identifying the same URI.
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if (NS_SUCCEEDED(in->SchemeIs("resource", &equals)) && equals) {
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nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIProtocolHandler> ph;
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rv = ioService->GetProtocolHandler("resource", getter_AddRefs(ph));
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIResProtocolHandler> irph(do_QueryInterface(ph, &rv));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = irph->ResolveURI(in, spec);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = ioService->NewURI(spec, nullptr, nullptr, getter_AddRefs(uri));
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NS_ENSURE_SUCCESS(rv, rv);
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} else {
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if (NS_SUCCEEDED(in->SchemeIs("chrome", &equals)) && equals) {
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nsCOMPtr<nsIChromeRegistry> chromeReg =
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mozilla::services::GetChromeRegistryService();
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if (!chromeReg)
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return NS_ERROR_UNEXPECTED;
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rv = chromeReg->ConvertChromeURL(in, getter_AddRefs(uri));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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rv = uri->GetSpec(spec);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (!canonicalizeBase(spec, out)) {
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if (NS_SUCCEEDED(uri->SchemeIs("file", &equals)) && equals) {
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nsCOMPtr<nsIFileURL> baseFileURL;
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baseFileURL = do_QueryInterface(uri, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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nsAutoCString path;
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rv = baseFileURL->GetPath(path);
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NS_ENSURE_SUCCESS(rv, rv);
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out.Append(path);
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} else if (NS_SUCCEEDED(uri->SchemeIs("jar", &equals)) && equals) {
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nsCOMPtr<nsIJARURI> jarURI = do_QueryInterface(uri, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIURI> jarFileURI;
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rv = jarURI->GetJARFile(getter_AddRefs(jarFileURI));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = PathifyURI(jarFileURI, out);
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NS_ENSURE_SUCCESS(rv, rv);
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nsAutoCString path;
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rv = jarURI->GetJAREntry(path);
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NS_ENSURE_SUCCESS(rv, rv);
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out.Append('/');
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out.Append(path);
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} else { // Very unlikely
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nsAutoCString spec;
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rv = uri->GetSpec(spec);
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NS_ENSURE_SUCCESS(rv, rv);
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out.Append('/');
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out.Append(spec);
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}
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}
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return NS_OK;
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}
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} // namespace scache
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} // namespace mozilla
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