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Diffstat (limited to 'netwerk/base/mozurl/MozURL.h')
| -rw-r--r-- | netwerk/base/mozurl/MozURL.h | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/netwerk/base/mozurl/MozURL.h b/netwerk/base/mozurl/MozURL.h new file mode 100644 index 0000000000..60e8c189ae --- /dev/null +++ b/netwerk/base/mozurl/MozURL.h @@ -0,0 +1,233 @@ +/* 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/. */ + +#ifndef mozURL_h__ +#define mozURL_h__ + +#include "mozilla/net/MozURL_ffi.h" +#include "mozilla/RefPtr.h" +#include "mozilla/Result.h" + +namespace mozilla { +namespace net { + +// This class provides a thread-safe, immutable URL parser. +// As long as there is RefPtr to the object, you may use it on any thread. +// The constructor is private. One can instantiate the object by +// calling the Init() method as such: +// +// RefPtr<MozURL> url; +// nsAutoCString href("http://example.com/path?query#ref"); +// nsresult rv = MozURL::Init(getter_AddRefs(url), href); +// if (NS_SUCCEEDED(rv)) { /* use url */ } +// +// When changing the URL is needed, you need to call the Mutate() method. +// This gives you a Mutator object, on which you can perform setter operations. +// Calling Finalize() on the Mutator will result in a new MozURL and a status +// code. If any of the setter operations failed, it will be reflected in the +// status code, and a null MozURL. +// +// Note: In the case of a domain name containing non-ascii characters, +// GetSpec and GetHostname will return the IDNA(punycode) version of the host. +// Also note that for now, MozURL only supports the UTF-8 charset. +// +// Implementor Note: This type is only a holder for methods in C++, and does not +// reflect the actual layout of the type. +class MozURL final { + public: + static nsresult Init(MozURL** aURL, const nsACString& aSpec, + const MozURL* aBaseURL = nullptr) { + return mozurl_new(aURL, &aSpec, aBaseURL); + } + + nsDependentCSubstring Spec() const { return mozurl_spec(this); } + nsDependentCSubstring Scheme() const { return mozurl_scheme(this); } + nsDependentCSubstring Username() const { return mozurl_username(this); } + nsDependentCSubstring Password() const { return mozurl_password(this); } + // Will return the hostname of URL. If the hostname is an IPv6 address, + // it will be enclosed in square brackets, such as `[::1]` + nsDependentCSubstring Host() const { return mozurl_host(this); } + // Will return the port number, if specified, or -1 + int32_t Port() const { return mozurl_port(this); } + int32_t RealPort() const { return mozurl_real_port(this); } + // If the URL's port number is equal to the default port, will only return the + // hostname, otherwise it will return a string of the form `{host}:{port}` + // See: https://url.spec.whatwg.org/#default-port + nsDependentCSubstring HostPort() const { return mozurl_host_port(this); } + nsDependentCSubstring FilePath() const { return mozurl_filepath(this); } + nsDependentCSubstring Path() const { return mozurl_path(this); } + nsDependentCSubstring Query() const { return mozurl_query(this); } + bool HasQuery() const { return mozurl_has_query(this); } + nsDependentCSubstring Ref() const { return mozurl_fragment(this); } + bool HasFragment() const { return mozurl_has_fragment(this); } + nsDependentCSubstring Directory() const { return mozurl_directory(this); } + nsDependentCSubstring PrePath() const { return mozurl_prepath(this); } + nsDependentCSubstring SpecNoRef() const { return mozurl_spec_no_ref(this); } + + // This matches the definition of origins and base domains in nsIPrincipal for + // almost all URIs (some rare file:// URIs don't match and it would be hard to + // fix them). It definitely matches nsIPrincipal for URIs used in quota + // manager and there are checks in quota manager and its clients that prevent + // different definitions (see QuotaManager::IsPrincipalInfoValid). + // See also TestMozURL.cpp which enumerates a huge pile of URIs and checks + // that origin and base domain definitions are in sync. + void Origin(nsACString& aOrigin) const { mozurl_origin(this, &aOrigin); } + nsresult BaseDomain(nsACString& aBaseDomain) const { + return mozurl_base_domain(this, &aBaseDomain); + } + bool CannotBeABase() { return mozurl_cannot_be_a_base(this); } + + nsresult GetCommonBase(const MozURL* aOther, MozURL** aCommon) const { + return mozurl_common_base(this, aOther, aCommon); + } + nsresult GetRelative(const MozURL* aOther, nsACString* aRelative) const { + return mozurl_relative(this, aOther, aRelative); + } + + size_t SizeOf() { return mozurl_sizeof(this); } + + class Mutator { + public: + // Calling this method will result in the creation of a new MozURL that + // adopts the mutator's mURL. + // If any of the setters failed with an error code, that error code will be + // returned here. It will also return an error code if Finalize is called + // more than once on the Mutator. + nsresult Finalize(MozURL** aURL) { + nsresult rv = GetStatus(); + if (NS_SUCCEEDED(rv)) { + mURL.forget(aURL); + } else { + *aURL = nullptr; + } + return rv; + } + + // These setter methods will return a reference to `this` so that you may + // chain setter operations as such: + // + // RefPtr<MozURL> url2; + // nsresult rv = url->Mutate().SetHostname("newhost"_ns) + // .SetFilePath("new/file/path"_ns) + // .Finalize(getter_AddRefs(url2)); + // if (NS_SUCCEEDED(rv)) { /* use url2 */ } + Mutator& SetScheme(const nsACString& aScheme) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_scheme(mURL, &aScheme); + } + return *this; + } + Mutator& SetUsername(const nsACString& aUser) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_username(mURL, &aUser); + } + return *this; + } + Mutator& SetPassword(const nsACString& aPassword) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_password(mURL, &aPassword); + } + return *this; + } + Mutator& SetHostname(const nsACString& aHost) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_hostname(mURL, &aHost); + } + return *this; + } + Mutator& SetHostPort(const nsACString& aHostPort) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_host_port(mURL, &aHostPort); + } + return *this; + } + Mutator& SetFilePath(const nsACString& aPath) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_pathname(mURL, &aPath); + } + return *this; + } + Mutator& SetQuery(const nsACString& aQuery) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_query(mURL, &aQuery); + } + return *this; + } + Mutator& SetRef(const nsACString& aRef) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_fragment(mURL, &aRef); + } + return *this; + } + Mutator& SetPort(int32_t aPort) { + if (NS_SUCCEEDED(GetStatus())) { + mStatus = mozurl_set_port_no(mURL, aPort); + } + return *this; + } + + // This method returns the status code of the setter operations. + // If any of the setters failed, it will return the code of the first error + // that occured. If none of the setters failed, it will return NS_OK. + // This method is useful to avoid doing expensive operations when the result + // would not be used because an error occurred. For example: + // + // RefPtr<MozURL> url2; + // MozURL::Mutator mut = url->Mutate(); + // mut.SetScheme("!@#$"); // this would fail + // if (NS_SUCCEDED(mut.GetStatus())) { + // nsAutoCString host(ExpensiveComputing()); + // rv = mut.SetHostname(host).Finalize(getter_AddRefs(url2)); + // } + // if (NS_SUCCEEDED(rv)) { /* use url2 */ } + nsresult GetStatus() { return mURL ? mStatus : NS_ERROR_NOT_AVAILABLE; } + + static Result<Mutator, nsresult> FromSpec( + const nsACString& aSpec, const MozURL* aBaseURL = nullptr) { + Mutator m = Mutator(aSpec, aBaseURL); + if (m.mURL) { + MOZ_ASSERT(NS_SUCCEEDED(m.mStatus)); + return m; + } + + MOZ_ASSERT(NS_FAILED(m.mStatus)); + return Err(m.mStatus); + } + + private: + explicit Mutator(MozURL* aUrl) : mStatus(NS_OK) { + mozurl_clone(aUrl, getter_AddRefs(mURL)); + } + + // This is only used to create a mutator from a string without cloning it + // so we avoid a pointless copy in FromSpec. It is important that we + // check the value of mURL afterwards. + explicit Mutator(const nsACString& aSpec, + const MozURL* aBaseURL = nullptr) { + mStatus = mozurl_new(getter_AddRefs(mURL), &aSpec, aBaseURL); + } + RefPtr<MozURL> mURL; + nsresult mStatus; + friend class MozURL; + }; + + Mutator Mutate() { return Mutator(this); } + + // AddRef and Release are non-virtual on this type, and always call into rust. + void AddRef() { mozurl_addref(this); } + void Release() { mozurl_release(this); } + + private: + // Make it a compile time error for C++ code to ever create, destruct, or copy + // MozURL objects. All of these operations will be performed by rust. + MozURL(); /* never defined */ + ~MozURL(); /* never defined */ + MozURL(const MozURL&) = delete; + MozURL& operator=(const MozURL&) = delete; +}; + +} // namespace net +} // namespace mozilla + +#endif // mozURL_h__ |