mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-24 21:31:04 +00:00
243 lines
7.8 KiB
C++
243 lines
7.8 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 "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 "nsStringStream.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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nsresult NewObjectInputStreamFromBuffer(const char* buffer, uint32_t len,
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nsIObjectInputStream** stream) {
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nsCOMPtr<nsIInputStream> stringStream;
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nsresult rv = NS_NewByteInputStream(getter_AddRefs(stringStream),
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Span(buffer, len), NS_ASSIGNMENT_DEPEND);
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MOZ_ALWAYS_SUCCEEDS(rv);
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nsCOMPtr<nsIObjectInputStream> objectInput =
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NS_NewObjectInputStream(stringStream);
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objectInput.forget(stream);
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return NS_OK;
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}
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nsresult NewObjectOutputWrappedStorageStream(
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nsIObjectOutputStream** wrapperStream, nsIStorageStream** stream,
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bool wantDebugStream) {
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nsCOMPtr<nsIStorageStream> storageStream;
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nsresult rv =
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NS_NewStorageStream(256, UINT32_MAX, getter_AddRefs(storageStream));
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIOutputStream> outputStream = do_QueryInterface(storageStream);
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nsCOMPtr<nsIObjectOutputStream> objectOutput =
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NS_NewObjectOutputStream(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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nsresult NewBufferFromStorageStream(nsIStorageStream* storageStream,
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UniquePtr<char[]>* buffer, uint32_t* len) {
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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) 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 = std::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 canonicalizeBase(nsAutoCString& spec, nsACString& out) {
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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()) return false;
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rv = mozilla::Omnijar::GetURIString(mozilla::Omnijar::APP, appBase);
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if (NS_FAILED(rv)) return false;
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bool underGre = !greBase.Compare(spec.get(), false, greBase.Length());
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bool underApp =
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appBase.Length() && !appBase.Compare(spec.get(), false, appBase.Length());
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if (!underGre && !underApp) 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(
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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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* ResolveURI transforms a chrome: or resource: URI into the URI for its
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* underlying resource, or returns any other URI unchanged.
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*/
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nsresult ResolveURI(nsIURI* in, nsIURI** out) {
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nsresult rv;
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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 (in->SchemeIs("resource")) {
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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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nsAutoCString spec;
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rv = irph->ResolveURI(in, spec);
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NS_ENSURE_SUCCESS(rv, rv);
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return ioService->NewURI(spec, nullptr, nullptr, out);
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}
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if (in->SchemeIs("chrome")) {
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nsCOMPtr<nsIChromeRegistry> chromeReg =
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mozilla::services::GetChromeRegistry();
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if (!chromeReg) return NS_ERROR_UNEXPECTED;
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return chromeReg->ConvertChromeURL(in, out);
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}
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*out = do_AddRef(in).take();
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return NS_OK;
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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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nsresult PathifyURI(nsIURI* in, nsACString& out) {
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nsCOMPtr<nsIURI> uri;
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nsresult rv = ResolveURI(in, getter_AddRefs(uri));
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NS_ENSURE_SUCCESS(rv, rv);
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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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if (!canonicalizeBase(spec, out)) {
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if (uri->SchemeIs("file")) {
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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->GetPathQueryRef(path);
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NS_ENSURE_SUCCESS(rv, rv);
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out.Append(path);
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} else if (uri->SchemeIs("jar")) {
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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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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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