| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef URL_ORIGIN_H_ |
| #define URL_ORIGIN_H_ |
| |
| #include <stdint.h> |
| |
| #include <string> |
| |
| #include "base/strings/string16.h" |
| #include "base/strings/string_piece.h" |
| #include "url/scheme_host_port.h" |
| #include "url/third_party/mozilla/url_parse.h" |
| #include "url/url_canon.h" |
| #include "url/url_constants.h" |
| #include "url/url_export.h" |
| |
| class GURL; |
| |
| namespace url { |
| |
| // An Origin is a tuple of (scheme, host, port), as described in RFC 6454. |
| // |
| // TL;DR: If you need to make a security-relevant decision, use 'url::Origin'. |
| // If you only need to extract the bits of a URL which are relevant for a |
| // network connection, use 'url::SchemeHostPort'. |
| // |
| // STL;SDR: If you aren't making actual network connections, use 'url::Origin'. |
| // |
| // 'Origin', like 'SchemeHostPort', is composed of a tuple of (scheme, host, |
| // port), but contains a number of additional concepts which make it appropriate |
| // for use as a security boundary and access control mechanism between contexts. |
| // |
| // This class ought to be used when code needs to determine if two resources |
| // are "same-origin", and when a canonical serialization of an origin is |
| // required. Note that some origins are "unique", meaning that they are not |
| // same-origin with any other origin (including themselves). |
| // |
| // There are a few subtleties to note: |
| // |
| // * Invalid and non-standard GURLs are parsed as unique origins. This includes |
| // non-hierarchical URLs like 'data:text/html,...' and 'javascript:alert(1)'. |
| // |
| // * GURLs with schemes of 'filesystem' or 'blob' parse the origin out of the |
| // internals of the URL. That is, 'filesystem:https://example.com/temporary/f' |
| // is parsed as ('https', 'example.com', 443). |
| // |
| // * Unique origins all serialize to the string "null"; this means that the |
| // serializations of two unique origins are identical to each other, though |
| // the origins themselves are not "the same". This means that origins' |
| // serializations must not be relied upon for security checks. |
| // |
| // * GURLs with a 'file' scheme are tricky. They are parsed as ('file', '', 0), |
| // but their behavior may differ from embedder to embedder. |
| // |
| // * The host component of an IPv6 address includes brackets, just like the URL |
| // representation. |
| // |
| // Usage: |
| // |
| // * Origins are generally constructed from an already-canonicalized GURL: |
| // |
| // GURL url("https://example.com/"); |
| // url::Origin origin(url); |
| // origin.scheme(); // "https" |
| // origin.host(); // "example.com" |
| // origin.port(); // 443 |
| // origin.unique(); // false |
| // |
| // * To answer the question "Are |this| and |that| "same-origin" with each |
| // other?", use |Origin::IsSameOriginWith|: |
| // |
| // if (this.IsSameOriginWith(that)) { |
| // // Amazingness goes here. |
| // } |
| class URL_EXPORT Origin { |
| public: |
| // Creates a unique Origin. |
| Origin(); |
| |
| // Creates an Origin from |url|, as described at |
| // https://url.spec.whatwg.org/#origin, with the following additions: |
| // |
| // 1. If |url| is invalid or non-standard, a unique Origin is constructed. |
| // 2. 'filesystem' URLs behave as 'blob' URLs (that is, the origin is parsed |
| // out of everything in the URL which follows the scheme). |
| // 3. 'file' URLs all parse as ("file", "", 0). |
| explicit Origin(const GURL& url); |
| |
| // Creates an Origin from a |scheme|, |host|, and |port|. All the parameters |
| // must be valid and canonicalized. In particular, note that this cannot be |
| // used to create unique origins; 'url::Origin()' is the right way to do that. |
| // |
| // This constructor should be used in order to pass 'Origin' objects back and |
| // forth over IPC (as transitioning through GURL would risk potentially |
| // dangerous recanonicalization); other potential callers should prefer the |
| // 'GURL'-based constructor. |
| static Origin UnsafelyCreateOriginWithoutNormalization( |
| base::StringPiece scheme, |
| base::StringPiece host, |
| uint16_t port); |
| |
| ~Origin(); |
| |
| // For unique origins, these return ("", "", 0). |
| const std::string& scheme() const { return tuple_.scheme(); } |
| const std::string& host() const { return tuple_.host(); } |
| uint16_t port() const { return tuple_.port(); } |
| |
| bool unique() const { return unique_; } |
| |
| // An ASCII serialization of the Origin as per Section 6.2 of RFC 6454, with |
| // the addition that all Origins with a 'file' scheme serialize to "file://". |
| std::string Serialize() const; |
| |
| // Two Origins are "same-origin" if their schemes, hosts, and ports are exact |
| // matches; and neither is unique. |
| bool IsSameOriginWith(const Origin& other) const; |
| bool operator==(const Origin& other) const { |
| return IsSameOriginWith(other); |
| } |
| |
| // Allows Origin to be used as a key in STL (for example, a std::set or |
| // std::map). |
| bool operator<(const Origin& other) const; |
| |
| private: |
| Origin(base::StringPiece scheme, base::StringPiece host, uint16_t port); |
| |
| SchemeHostPort tuple_; |
| bool unique_; |
| }; |
| |
| URL_EXPORT std::ostream& operator<<(std::ostream& out, const Origin& origin); |
| |
| URL_EXPORT bool IsSameOriginWith(const GURL& a, const GURL& b); |
| |
| } // namespace url |
| |
| #endif // URL_ORIGIN_H_ |