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f3062b422e
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/.idea/
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Mozilla Public License Version 2.0
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||||||
|
==================================
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||||||
|
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|
1. Definitions
|
||||||
|
--------------
|
||||||
|
|
||||||
|
1.1. "Contributor"
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|
means each individual or legal entity that creates, contributes to
|
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|
the creation of, or owns Covered Software.
|
||||||
|
|
||||||
|
1.2. "Contributor Version"
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||||||
|
means the combination of the Contributions of others (if any) used
|
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|
by a Contributor and that particular Contributor's Contribution.
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|
|
||||||
|
1.3. "Contribution"
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||||||
|
means Covered Software of a particular Contributor.
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||||||
|
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||||||
|
1.4. "Covered Software"
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||||||
|
means Source Code Form to which the initial Contributor has attached
|
||||||
|
the notice in Exhibit A, the Executable Form of such Source Code
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|
Form, and Modifications of such Source Code Form, in each case
|
||||||
|
including portions thereof.
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||||||
|
|
||||||
|
1.5. "Incompatible With Secondary Licenses"
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||||||
|
means
|
||||||
|
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|
(a) that the initial Contributor has attached the notice described
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||||||
|
in Exhibit B to the Covered Software; or
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||||||
|
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||||||
|
(b) that the Covered Software was made available under the terms of
|
||||||
|
version 1.1 or earlier of the License, but not also under the
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||||||
|
terms of a Secondary License.
|
||||||
|
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||||||
|
1.6. "Executable Form"
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||||||
|
means any form of the work other than Source Code Form.
|
||||||
|
|
||||||
|
1.7. "Larger Work"
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||||||
|
means a work that combines Covered Software with other material, in
|
||||||
|
a separate file or files, that is not Covered Software.
|
||||||
|
|
||||||
|
1.8. "License"
|
||||||
|
means this document.
|
||||||
|
|
||||||
|
1.9. "Licensable"
|
||||||
|
means having the right to grant, to the maximum extent possible,
|
||||||
|
whether at the time of the initial grant or subsequently, any and
|
||||||
|
all of the rights conveyed by this License.
|
||||||
|
|
||||||
|
1.10. "Modifications"
|
||||||
|
means any of the following:
|
||||||
|
|
||||||
|
(a) any file in Source Code Form that results from an addition to,
|
||||||
|
deletion from, or modification of the contents of Covered
|
||||||
|
Software; or
|
||||||
|
|
||||||
|
(b) any new file in Source Code Form that contains any Covered
|
||||||
|
Software.
|
||||||
|
|
||||||
|
1.11. "Patent Claims" of a Contributor
|
||||||
|
means any patent claim(s), including without limitation, method,
|
||||||
|
process, and apparatus claims, in any patent Licensable by such
|
||||||
|
Contributor that would be infringed, but for the grant of the
|
||||||
|
License, by the making, using, selling, offering for sale, having
|
||||||
|
made, import, or transfer of either its Contributions or its
|
||||||
|
Contributor Version.
|
||||||
|
|
||||||
|
1.12. "Secondary License"
|
||||||
|
means either the GNU General Public License, Version 2.0, the GNU
|
||||||
|
Lesser General Public License, Version 2.1, the GNU Affero General
|
||||||
|
Public License, Version 3.0, or any later versions of those
|
||||||
|
licenses.
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||||||
|
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||||||
|
1.13. "Source Code Form"
|
||||||
|
means the form of the work preferred for making modifications.
|
||||||
|
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||||||
|
1.14. "You" (or "Your")
|
||||||
|
means an individual or a legal entity exercising rights under this
|
||||||
|
License. For legal entities, "You" includes any entity that
|
||||||
|
controls, is controlled by, or is under common control with You. For
|
||||||
|
purposes of this definition, "control" means (a) the power, direct
|
||||||
|
or indirect, to cause the direction or management of such entity,
|
||||||
|
whether by contract or otherwise, or (b) ownership of more than
|
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|
fifty percent (50%) of the outstanding shares or beneficial
|
||||||
|
ownership of such entity.
|
||||||
|
|
||||||
|
2. License Grants and Conditions
|
||||||
|
--------------------------------
|
||||||
|
|
||||||
|
2.1. Grants
|
||||||
|
|
||||||
|
Each Contributor hereby grants You a world-wide, royalty-free,
|
||||||
|
non-exclusive license:
|
||||||
|
|
||||||
|
(a) under intellectual property rights (other than patent or trademark)
|
||||||
|
Licensable by such Contributor to use, reproduce, make available,
|
||||||
|
modify, display, perform, distribute, and otherwise exploit its
|
||||||
|
Contributions, either on an unmodified basis, with Modifications, or
|
||||||
|
as part of a Larger Work; and
|
||||||
|
|
||||||
|
(b) under Patent Claims of such Contributor to make, use, sell, offer
|
||||||
|
for sale, have made, import, and otherwise transfer either its
|
||||||
|
Contributions or its Contributor Version.
|
||||||
|
|
||||||
|
2.2. Effective Date
|
||||||
|
|
||||||
|
The licenses granted in Section 2.1 with respect to any Contribution
|
||||||
|
become effective for each Contribution on the date the Contributor first
|
||||||
|
distributes such Contribution.
|
||||||
|
|
||||||
|
2.3. Limitations on Grant Scope
|
||||||
|
|
||||||
|
The licenses granted in this Section 2 are the only rights granted under
|
||||||
|
this License. No additional rights or licenses will be implied from the
|
||||||
|
distribution or licensing of Covered Software under this License.
|
||||||
|
Notwithstanding Section 2.1(b) above, no patent license is granted by a
|
||||||
|
Contributor:
|
||||||
|
|
||||||
|
(a) for any code that a Contributor has removed from Covered Software;
|
||||||
|
or
|
||||||
|
|
||||||
|
(b) for infringements caused by: (i) Your and any other third party's
|
||||||
|
modifications of Covered Software, or (ii) the combination of its
|
||||||
|
Contributions with other software (except as part of its Contributor
|
||||||
|
Version); or
|
||||||
|
|
||||||
|
(c) under Patent Claims infringed by Covered Software in the absence of
|
||||||
|
its Contributions.
|
||||||
|
|
||||||
|
This License does not grant any rights in the trademarks, service marks,
|
||||||
|
or logos of any Contributor (except as may be necessary to comply with
|
||||||
|
the notice requirements in Section 3.4).
|
||||||
|
|
||||||
|
2.4. Subsequent Licenses
|
||||||
|
|
||||||
|
No Contributor makes additional grants as a result of Your choice to
|
||||||
|
distribute the Covered Software under a subsequent version of this
|
||||||
|
License (see Section 10.2) or under the terms of a Secondary License (if
|
||||||
|
permitted under the terms of Section 3.3).
|
||||||
|
|
||||||
|
2.5. Representation
|
||||||
|
|
||||||
|
Each Contributor represents that the Contributor believes its
|
||||||
|
Contributions are its original creation(s) or it has sufficient rights
|
||||||
|
to grant the rights to its Contributions conveyed by this License.
|
||||||
|
|
||||||
|
2.6. Fair Use
|
||||||
|
|
||||||
|
This License is not intended to limit any rights You have under
|
||||||
|
applicable copyright doctrines of fair use, fair dealing, or other
|
||||||
|
equivalents.
|
||||||
|
|
||||||
|
2.7. Conditions
|
||||||
|
|
||||||
|
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
|
||||||
|
in Section 2.1.
|
||||||
|
|
||||||
|
3. Responsibilities
|
||||||
|
-------------------
|
||||||
|
|
||||||
|
3.1. Distribution of Source Form
|
||||||
|
|
||||||
|
All distribution of Covered Software in Source Code Form, including any
|
||||||
|
Modifications that You create or to which You contribute, must be under
|
||||||
|
the terms of this License. You must inform recipients that the Source
|
||||||
|
Code Form of the Covered Software is governed by the terms of this
|
||||||
|
License, and how they can obtain a copy of this License. You may not
|
||||||
|
attempt to alter or restrict the recipients' rights in the Source Code
|
||||||
|
Form.
|
||||||
|
|
||||||
|
3.2. Distribution of Executable Form
|
||||||
|
|
||||||
|
If You distribute Covered Software in Executable Form then:
|
||||||
|
|
||||||
|
(a) such Covered Software must also be made available in Source Code
|
||||||
|
Form, as described in Section 3.1, and You must inform recipients of
|
||||||
|
the Executable Form how they can obtain a copy of such Source Code
|
||||||
|
Form by reasonable means in a timely manner, at a charge no more
|
||||||
|
than the cost of distribution to the recipient; and
|
||||||
|
|
||||||
|
(b) You may distribute such Executable Form under the terms of this
|
||||||
|
License, or sublicense it under different terms, provided that the
|
||||||
|
license for the Executable Form does not attempt to limit or alter
|
||||||
|
the recipients' rights in the Source Code Form under this License.
|
||||||
|
|
||||||
|
3.3. Distribution of a Larger Work
|
||||||
|
|
||||||
|
You may create and distribute a Larger Work under terms of Your choice,
|
||||||
|
provided that You also comply with the requirements of this License for
|
||||||
|
the Covered Software. If the Larger Work is a combination of Covered
|
||||||
|
Software with a work governed by one or more Secondary Licenses, and the
|
||||||
|
Covered Software is not Incompatible With Secondary Licenses, this
|
||||||
|
License permits You to additionally distribute such Covered Software
|
||||||
|
under the terms of such Secondary License(s), so that the recipient of
|
||||||
|
the Larger Work may, at their option, further distribute the Covered
|
||||||
|
Software under the terms of either this License or such Secondary
|
||||||
|
License(s).
|
||||||
|
|
||||||
|
3.4. Notices
|
||||||
|
|
||||||
|
You may not remove or alter the substance of any license notices
|
||||||
|
(including copyright notices, patent notices, disclaimers of warranty,
|
||||||
|
or limitations of liability) contained within the Source Code Form of
|
||||||
|
the Covered Software, except that You may alter any license notices to
|
||||||
|
the extent required to remedy known factual inaccuracies.
|
||||||
|
|
||||||
|
3.5. Application of Additional Terms
|
||||||
|
|
||||||
|
You may choose to offer, and to charge a fee for, warranty, support,
|
||||||
|
indemnity or liability obligations to one or more recipients of Covered
|
||||||
|
Software. However, You may do so only on Your own behalf, and not on
|
||||||
|
behalf of any Contributor. You must make it absolutely clear that any
|
||||||
|
such warranty, support, indemnity, or liability obligation is offered by
|
||||||
|
You alone, and You hereby agree to indemnify every Contributor for any
|
||||||
|
liability incurred by such Contributor as a result of warranty, support,
|
||||||
|
indemnity or liability terms You offer. You may include additional
|
||||||
|
disclaimers of warranty and limitations of liability specific to any
|
||||||
|
jurisdiction.
|
||||||
|
|
||||||
|
4. Inability to Comply Due to Statute or Regulation
|
||||||
|
---------------------------------------------------
|
||||||
|
|
||||||
|
If it is impossible for You to comply with any of the terms of this
|
||||||
|
License with respect to some or all of the Covered Software due to
|
||||||
|
statute, judicial order, or regulation then You must: (a) comply with
|
||||||
|
the terms of this License to the maximum extent possible; and (b)
|
||||||
|
describe the limitations and the code they affect. Such description must
|
||||||
|
be placed in a text file included with all distributions of the Covered
|
||||||
|
Software under this License. Except to the extent prohibited by statute
|
||||||
|
or regulation, such description must be sufficiently detailed for a
|
||||||
|
recipient of ordinary skill to be able to understand it.
|
||||||
|
|
||||||
|
5. Termination
|
||||||
|
--------------
|
||||||
|
|
||||||
|
5.1. The rights granted under this License will terminate automatically
|
||||||
|
if You fail to comply with any of its terms. However, if You become
|
||||||
|
compliant, then the rights granted under this License from a particular
|
||||||
|
Contributor are reinstated (a) provisionally, unless and until such
|
||||||
|
Contributor explicitly and finally terminates Your grants, and (b) on an
|
||||||
|
ongoing basis, if such Contributor fails to notify You of the
|
||||||
|
non-compliance by some reasonable means prior to 60 days after You have
|
||||||
|
come back into compliance. Moreover, Your grants from a particular
|
||||||
|
Contributor are reinstated on an ongoing basis if such Contributor
|
||||||
|
notifies You of the non-compliance by some reasonable means, this is the
|
||||||
|
first time You have received notice of non-compliance with this License
|
||||||
|
from such Contributor, and You become compliant prior to 30 days after
|
||||||
|
Your receipt of the notice.
|
||||||
|
|
||||||
|
5.2. If You initiate litigation against any entity by asserting a patent
|
||||||
|
infringement claim (excluding declaratory judgment actions,
|
||||||
|
counter-claims, and cross-claims) alleging that a Contributor Version
|
||||||
|
directly or indirectly infringes any patent, then the rights granted to
|
||||||
|
You by any and all Contributors for the Covered Software under Section
|
||||||
|
2.1 of this License shall terminate.
|
||||||
|
|
||||||
|
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
|
||||||
|
end user license agreements (excluding distributors and resellers) which
|
||||||
|
have been validly granted by You or Your distributors under this License
|
||||||
|
prior to termination shall survive termination.
|
||||||
|
|
||||||
|
************************************************************************
|
||||||
|
* *
|
||||||
|
* 6. Disclaimer of Warranty *
|
||||||
|
* ------------------------- *
|
||||||
|
* *
|
||||||
|
* Covered Software is provided under this License on an "as is" *
|
||||||
|
* basis, without warranty of any kind, either expressed, implied, or *
|
||||||
|
* statutory, including, without limitation, warranties that the *
|
||||||
|
* Covered Software is free of defects, merchantable, fit for a *
|
||||||
|
* particular purpose or non-infringing. The entire risk as to the *
|
||||||
|
* quality and performance of the Covered Software is with You. *
|
||||||
|
* Should any Covered Software prove defective in any respect, You *
|
||||||
|
* (not any Contributor) assume the cost of any necessary servicing, *
|
||||||
|
* repair, or correction. This disclaimer of warranty constitutes an *
|
||||||
|
* essential part of this License. No use of any Covered Software is *
|
||||||
|
* authorized under this License except under this disclaimer. *
|
||||||
|
* *
|
||||||
|
************************************************************************
|
||||||
|
|
||||||
|
************************************************************************
|
||||||
|
* *
|
||||||
|
* 7. Limitation of Liability *
|
||||||
|
* -------------------------- *
|
||||||
|
* *
|
||||||
|
* Under no circumstances and under no legal theory, whether tort *
|
||||||
|
* (including negligence), contract, or otherwise, shall any *
|
||||||
|
* Contributor, or anyone who distributes Covered Software as *
|
||||||
|
* permitted above, be liable to You for any direct, indirect, *
|
||||||
|
* special, incidental, or consequential damages of any character *
|
||||||
|
* including, without limitation, damages for lost profits, loss of *
|
||||||
|
* goodwill, work stoppage, computer failure or malfunction, or any *
|
||||||
|
* and all other commercial damages or losses, even if such party *
|
||||||
|
* shall have been informed of the possibility of such damages. This *
|
||||||
|
* limitation of liability shall not apply to liability for death or *
|
||||||
|
* personal injury resulting from such party's negligence to the *
|
||||||
|
* extent applicable law prohibits such limitation. Some *
|
||||||
|
* jurisdictions do not allow the exclusion or limitation of *
|
||||||
|
* incidental or consequential damages, so this exclusion and *
|
||||||
|
* limitation may not apply to You. *
|
||||||
|
* *
|
||||||
|
************************************************************************
|
||||||
|
|
||||||
|
8. Litigation
|
||||||
|
-------------
|
||||||
|
|
||||||
|
Any litigation relating to this License may be brought only in the
|
||||||
|
courts of a jurisdiction where the defendant maintains its principal
|
||||||
|
place of business and such litigation shall be governed by laws of that
|
||||||
|
jurisdiction, without reference to its conflict-of-law provisions.
|
||||||
|
Nothing in this Section shall prevent a party's ability to bring
|
||||||
|
cross-claims or counter-claims.
|
||||||
|
|
||||||
|
9. Miscellaneous
|
||||||
|
----------------
|
||||||
|
|
||||||
|
This License represents the complete agreement concerning the subject
|
||||||
|
matter hereof. If any provision of this License is held to be
|
||||||
|
unenforceable, such provision shall be reformed only to the extent
|
||||||
|
necessary to make it enforceable. Any law or regulation which provides
|
||||||
|
that the language of a contract shall be construed against the drafter
|
||||||
|
shall not be used to construe this License against a Contributor.
|
||||||
|
|
||||||
|
10. Versions of the License
|
||||||
|
---------------------------
|
||||||
|
|
||||||
|
10.1. New Versions
|
||||||
|
|
||||||
|
Mozilla Foundation is the license steward. Except as provided in Section
|
||||||
|
10.3, no one other than the license steward has the right to modify or
|
||||||
|
publish new versions of this License. Each version will be given a
|
||||||
|
distinguishing version number.
|
||||||
|
|
||||||
|
10.2. Effect of New Versions
|
||||||
|
|
||||||
|
You may distribute the Covered Software under the terms of the version
|
||||||
|
of the License under which You originally received the Covered Software,
|
||||||
|
or under the terms of any subsequent version published by the license
|
||||||
|
steward.
|
||||||
|
|
||||||
|
10.3. Modified Versions
|
||||||
|
|
||||||
|
If you create software not governed by this License, and you want to
|
||||||
|
create a new license for such software, you may create and use a
|
||||||
|
modified version of this License if you rename the license and remove
|
||||||
|
any references to the name of the license steward (except to note that
|
||||||
|
such modified license differs from this License).
|
||||||
|
|
||||||
|
10.4. Distributing Source Code Form that is Incompatible With Secondary
|
||||||
|
Licenses
|
||||||
|
|
||||||
|
If You choose to distribute Source Code Form that is Incompatible With
|
||||||
|
Secondary Licenses under the terms of this version of the License, the
|
||||||
|
notice described in Exhibit B of this License must be attached.
|
||||||
|
|
||||||
|
Exhibit A - Source Code Form License Notice
|
||||||
|
-------------------------------------------
|
||||||
|
|
||||||
|
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/.
|
||||||
|
|
||||||
|
If it is not possible or desirable to put the notice in a particular
|
||||||
|
file, then You may include the notice in a location (such as a LICENSE
|
||||||
|
file in a relevant directory) where a recipient would be likely to look
|
||||||
|
for such a notice.
|
||||||
|
|
||||||
|
You may add additional accurate notices of copyright ownership.
|
||||||
|
|
||||||
|
Exhibit B - "Incompatible With Secondary Licenses" Notice
|
||||||
|
---------------------------------------------------------
|
||||||
|
|
||||||
|
This Source Code Form is "Incompatible With Secondary Licenses", as
|
||||||
|
defined by the Mozilla Public License, v. 2.0.
|
||||||
@ -0,0 +1,36 @@
|
|||||||
|
# asar [](https://godoc.org/layeh.com/asar)
|
||||||
|
|
||||||
|
Package asar reads and writes ASAR (Atom-Shell Archive) archives
|
||||||
|
|
||||||
|
import (
|
||||||
|
"os"
|
||||||
|
|
||||||
|
"layeh.com/asar"
|
||||||
|
)
|
||||||
|
|
||||||
|
|
||||||
|
f, err := os.Open("sample.asar")
|
||||||
|
if err != nil {
|
||||||
|
panic(err)
|
||||||
|
}
|
||||||
|
defer f.Close()
|
||||||
|
|
||||||
|
archive, err := asar.Decode(f)
|
||||||
|
if err != nil {
|
||||||
|
panic(err)
|
||||||
|
}
|
||||||
|
|
||||||
|
test := archive.Find("test", "file.txt")
|
||||||
|
if test == nil {
|
||||||
|
panic("file not found")
|
||||||
|
}
|
||||||
|
// print contents of test/file.txt in sample.asar
|
||||||
|
fmt.Println(test.String())
|
||||||
|
|
||||||
|
## License
|
||||||
|
|
||||||
|
MPL 2.0
|
||||||
|
|
||||||
|
## Author
|
||||||
|
|
||||||
|
Tim Cooper (tim.cooper@layeh.com)
|
||||||
@ -0,0 +1,80 @@
|
|||||||
|
package asar // import "b612.me/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"io"
|
||||||
|
"strings"
|
||||||
|
)
|
||||||
|
|
||||||
|
// Builder helps construct an Entry.
|
||||||
|
//
|
||||||
|
// A builder keeps track of the root Entry and the active Entry. When entries
|
||||||
|
// are added using the Add* methods, they are added as children to the active
|
||||||
|
// Entry.
|
||||||
|
type Builder struct {
|
||||||
|
root, current *Entry
|
||||||
|
}
|
||||||
|
|
||||||
|
// Root returns the root Entry.
|
||||||
|
func (b *Builder) Root() *Entry {
|
||||||
|
return b.root
|
||||||
|
}
|
||||||
|
|
||||||
|
func (b *Builder) init() {
|
||||||
|
if b.root == nil {
|
||||||
|
b.root = &Entry{
|
||||||
|
Flags: FlagDir,
|
||||||
|
}
|
||||||
|
b.current = b.root
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Parent sets the active entry to the parent of the active Entry (i.e. moves up
|
||||||
|
// a level).
|
||||||
|
//
|
||||||
|
// The function panics if called on the root Entry.
|
||||||
|
func (b *Builder) Parent() *Builder {
|
||||||
|
if b.current == b.root {
|
||||||
|
panic("root has no parent")
|
||||||
|
}
|
||||||
|
b.current = b.current.Parent
|
||||||
|
return b
|
||||||
|
}
|
||||||
|
|
||||||
|
// AddString adds a new file Entry whose contents are the given string.
|
||||||
|
func (b *Builder) AddString(name, contents string, flags Flag) *Builder {
|
||||||
|
return b.Add(name, strings.NewReader(contents), int64(len(contents)), flags)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add adds a new file Entry.
|
||||||
|
func (b *Builder) Add(name string, ra io.ReaderAt, size int64, flags Flag) *Builder {
|
||||||
|
b.init()
|
||||||
|
|
||||||
|
child := &Entry{
|
||||||
|
Name: name,
|
||||||
|
Size: size,
|
||||||
|
Flags: flags,
|
||||||
|
Parent: b.current,
|
||||||
|
|
||||||
|
r: ra,
|
||||||
|
}
|
||||||
|
b.current.Children = append(b.current.Children, child)
|
||||||
|
|
||||||
|
return b
|
||||||
|
}
|
||||||
|
|
||||||
|
// AddDir adds a new directory Entry. The active Entry is switched to this newly
|
||||||
|
// added Entry.
|
||||||
|
func (b *Builder) AddDir(name string, flags Flag) *Builder {
|
||||||
|
b.init()
|
||||||
|
|
||||||
|
child := &Entry{
|
||||||
|
Name: name,
|
||||||
|
Flags: flags | FlagDir,
|
||||||
|
Parent: b.current,
|
||||||
|
}
|
||||||
|
|
||||||
|
b.current.Children = append(b.current.Children, child)
|
||||||
|
b.current = child
|
||||||
|
|
||||||
|
return b
|
||||||
|
}
|
||||||
@ -0,0 +1,97 @@
|
|||||||
|
package main // import "b612.me/cmd/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"flag"
|
||||||
|
"fmt"
|
||||||
|
"os"
|
||||||
|
"path/filepath"
|
||||||
|
|
||||||
|
"b612.me/asar"
|
||||||
|
)
|
||||||
|
|
||||||
|
func main() {
|
||||||
|
flag.Usage = func() {
|
||||||
|
fmt.Fprintf(os.Stderr, "usage: %s [options] [command]\n", os.Args[0])
|
||||||
|
fmt.Fprintf(os.Stderr, "Commands:\n")
|
||||||
|
fmt.Fprintf(os.Stderr, "\n")
|
||||||
|
fmt.Fprintf(os.Stderr, " l|list <archive>\n")
|
||||||
|
fmt.Fprintf(os.Stderr, " list contents of asar archive\n")
|
||||||
|
fmt.Fprintf(os.Stderr, " x|extract <archive> <dir>\n")
|
||||||
|
fmt.Fprintf(os.Stderr, " extract contents of asar archive to directory\n")
|
||||||
|
fmt.Fprintf(os.Stderr, "\n")
|
||||||
|
flag.PrintDefaults()
|
||||||
|
}
|
||||||
|
flag.Parse()
|
||||||
|
|
||||||
|
if flag.NArg() < 2 {
|
||||||
|
flag.Usage()
|
||||||
|
os.Exit(3)
|
||||||
|
}
|
||||||
|
|
||||||
|
file, err := os.Open(flag.Arg(1))
|
||||||
|
if err != nil {
|
||||||
|
fmt.Fprintf(os.Stderr, "asar: %s\n", err)
|
||||||
|
os.Exit(1)
|
||||||
|
}
|
||||||
|
defer file.Close()
|
||||||
|
|
||||||
|
root, err := asar.Decode(file)
|
||||||
|
if err != nil {
|
||||||
|
fmt.Fprintf(os.Stderr, "asar: %s\n", err)
|
||||||
|
os.Exit(1)
|
||||||
|
}
|
||||||
|
|
||||||
|
switch command := flag.Arg(0); command {
|
||||||
|
case "l", "list":
|
||||||
|
root.Walk(func(path string, _ os.FileInfo, _ error) error {
|
||||||
|
fmt.Println("/" + path)
|
||||||
|
return nil
|
||||||
|
})
|
||||||
|
|
||||||
|
case "x", "extract":
|
||||||
|
if flag.NArg() < 3 {
|
||||||
|
flag.Usage()
|
||||||
|
os.Exit(1)
|
||||||
|
}
|
||||||
|
|
||||||
|
target := flag.Arg(2)
|
||||||
|
|
||||||
|
err := root.Walk(func(path string, info os.FileInfo, _ error) error {
|
||||||
|
entry := info.Sys().(*asar.Entry)
|
||||||
|
|
||||||
|
realPath := filepath.Join(target, path)
|
||||||
|
if entry.Flags&asar.FlagDir != 0 {
|
||||||
|
return os.MkdirAll(realPath, 0755)
|
||||||
|
}
|
||||||
|
if entry.Flags&asar.FlagUnpacked != 0 {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
perm := os.FileMode(0644)
|
||||||
|
if entry.Flags&asar.FlagExecutable != 0 {
|
||||||
|
perm |= 0111
|
||||||
|
}
|
||||||
|
|
||||||
|
f, err := os.OpenFile(realPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, perm)
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
_, err = entry.WriteTo(f)
|
||||||
|
if err != nil {
|
||||||
|
f.Close()
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
if err := f.Close(); err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
|
||||||
|
return nil
|
||||||
|
})
|
||||||
|
if err != nil {
|
||||||
|
fmt.Fprintf(os.Stderr, "asar: %s\n", err)
|
||||||
|
os.Exit(1)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
@ -0,0 +1,64 @@
|
|||||||
|
package asar // import "b612.me/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"encoding/binary"
|
||||||
|
"errors"
|
||||||
|
"io"
|
||||||
|
)
|
||||||
|
|
||||||
|
var (
|
||||||
|
errMalformed = errors.New("asar: malformed archive")
|
||||||
|
)
|
||||||
|
|
||||||
|
// Decode decodes the ASAR archive in ra.
|
||||||
|
//
|
||||||
|
// Returns the root element and nil on success. nil and an error is returned on
|
||||||
|
// failure.
|
||||||
|
func Decode(ra io.ReaderAt) (*Entry, error) {
|
||||||
|
headerSize := uint32(0)
|
||||||
|
headerStringSize := uint32(0)
|
||||||
|
|
||||||
|
// [pickle object header (4 bytes) == 4]
|
||||||
|
// [pickle uint32 = $header_object_size]
|
||||||
|
{
|
||||||
|
var buff [8]byte
|
||||||
|
if n, _ := ra.ReadAt(buff[:], 0); n != 8 {
|
||||||
|
return nil, errMalformed
|
||||||
|
}
|
||||||
|
|
||||||
|
dataSize := binary.LittleEndian.Uint32(buff[:4])
|
||||||
|
if dataSize != 4 {
|
||||||
|
return nil, errMalformed
|
||||||
|
}
|
||||||
|
headerSize = binary.LittleEndian.Uint32(buff[4:8])
|
||||||
|
}
|
||||||
|
|
||||||
|
// [pickle object header (4 bytes)]
|
||||||
|
// [pickle data header (4 bytes) == $string_size]
|
||||||
|
// [pickle string ($string_size bytes)]
|
||||||
|
{
|
||||||
|
var buff [8]byte
|
||||||
|
if n, _ := ra.ReadAt(buff[:], 8); n != 8 {
|
||||||
|
return nil, errMalformed
|
||||||
|
}
|
||||||
|
|
||||||
|
headerObjectSize := binary.LittleEndian.Uint32(buff[:4])
|
||||||
|
if headerObjectSize != headerSize-4 {
|
||||||
|
return nil, errMalformed
|
||||||
|
}
|
||||||
|
|
||||||
|
headerStringSize = binary.LittleEndian.Uint32(buff[4:8])
|
||||||
|
}
|
||||||
|
|
||||||
|
// read header string
|
||||||
|
headerSection := io.NewSectionReader(ra, 8+8, int64(headerStringSize))
|
||||||
|
baseOffset := 8 + int64(headerSize)
|
||||||
|
baseOffset += baseOffset % 4 // pickle objects are uint32 aligned
|
||||||
|
|
||||||
|
root, err := decodeHeader(ra, headerSection, baseOffset)
|
||||||
|
if err != nil {
|
||||||
|
return nil, err
|
||||||
|
}
|
||||||
|
|
||||||
|
return root, nil
|
||||||
|
}
|
||||||
@ -0,0 +1,91 @@
|
|||||||
|
package asar // import "b612.me/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"bytes"
|
||||||
|
"io/ioutil"
|
||||||
|
"os"
|
||||||
|
"path/filepath"
|
||||||
|
"testing"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestExtractThis(t *testing.T) {
|
||||||
|
f, err := os.Open("testdata/extractthis.asar")
|
||||||
|
if err != nil {
|
||||||
|
t.Fatal(err)
|
||||||
|
}
|
||||||
|
defer f.Close()
|
||||||
|
|
||||||
|
root, err := Decode(f)
|
||||||
|
if err != nil {
|
||||||
|
t.Fatal(err)
|
||||||
|
}
|
||||||
|
|
||||||
|
if root.Flags&FlagDir == 0 {
|
||||||
|
t.Fatal("expecting root directory to have FlagDir")
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
f1 := root.Find("dir1", "file1.txt")
|
||||||
|
if f1 == nil {
|
||||||
|
t.Fatal("could not find dir1/file1.txt")
|
||||||
|
}
|
||||||
|
if f1.Path() != "dir1/file1.txt" {
|
||||||
|
t.Fatal("unexpected path")
|
||||||
|
}
|
||||||
|
body, err := ioutil.ReadAll(f1.Open())
|
||||||
|
if err != nil {
|
||||||
|
t.Fatal(err)
|
||||||
|
}
|
||||||
|
if !bytes.Equal(body, []byte(`file one.`)) {
|
||||||
|
t.Fatalf("dir1/file1.txt body is incorrect (got %s)", body)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
f2 := root.Find("dir2").Find("file3.txt")
|
||||||
|
if f2 == nil {
|
||||||
|
t.Fatal("could not find dir2/file3.txt")
|
||||||
|
}
|
||||||
|
s := f2.String()
|
||||||
|
if s != `123` {
|
||||||
|
t.Fatalf("dir2/file3.txt body is incorrect (got %s)", s)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
empty := root.Find("emptyfile.txt")
|
||||||
|
if empty == nil {
|
||||||
|
t.Fatal("could not find emptyfile.txt")
|
||||||
|
}
|
||||||
|
if len(empty.Bytes()) != 0 {
|
||||||
|
t.Fatal("expecting emptyfile.txt to be empty")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
var i int
|
||||||
|
root.Walk(func(_ string, _ os.FileInfo, _ error) error {
|
||||||
|
i++
|
||||||
|
return nil
|
||||||
|
})
|
||||||
|
|
||||||
|
if i != 7 {
|
||||||
|
t.Fatalf("expected to walk over 7 items, got %d", i)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
var i int
|
||||||
|
root.Walk(func(_ string, fi os.FileInfo, _ error) error {
|
||||||
|
i++
|
||||||
|
if fi.IsDir() {
|
||||||
|
return filepath.SkipDir
|
||||||
|
}
|
||||||
|
return nil
|
||||||
|
})
|
||||||
|
|
||||||
|
if i != 4 {
|
||||||
|
t.Fatalf("expected to walk over 4 items, got %d", i)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
@ -0,0 +1,2 @@
|
|||||||
|
// Package asar reads and writes ASAR (Atom-Shell Archive) archives.
|
||||||
|
package asar // import "b612.me/asar"
|
||||||
@ -0,0 +1,131 @@
|
|||||||
|
package asar // import "b612.me/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"bytes"
|
||||||
|
"encoding/binary"
|
||||||
|
"encoding/json"
|
||||||
|
"io"
|
||||||
|
"strconv"
|
||||||
|
)
|
||||||
|
|
||||||
|
type entryEncoder struct {
|
||||||
|
Contents []io.Reader
|
||||||
|
CurrentOffset int64
|
||||||
|
Header bytes.Buffer
|
||||||
|
Encoder *json.Encoder
|
||||||
|
}
|
||||||
|
|
||||||
|
func (enc *entryEncoder) Write(v interface{}) {
|
||||||
|
enc.Encoder.Encode(v)
|
||||||
|
enc.Header.Truncate(enc.Header.Len() - 1) // cut off trailing new line
|
||||||
|
}
|
||||||
|
|
||||||
|
func (enc *entryEncoder) WriteField(key string, v interface{}) {
|
||||||
|
enc.Write(key)
|
||||||
|
enc.Header.WriteByte(':')
|
||||||
|
enc.Write(v)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (enc *entryEncoder) Encode(e *Entry) error {
|
||||||
|
enc.Header.WriteByte('{')
|
||||||
|
if e.Flags&FlagDir != 0 {
|
||||||
|
if e.Flags&FlagUnpacked != 0 {
|
||||||
|
enc.WriteField("unpacked", true)
|
||||||
|
enc.Header.WriteByte(',')
|
||||||
|
}
|
||||||
|
enc.Write("files")
|
||||||
|
enc.Header.WriteString(":{")
|
||||||
|
for i, child := range e.Children {
|
||||||
|
if i > 0 {
|
||||||
|
enc.Header.WriteByte(',')
|
||||||
|
}
|
||||||
|
if !validFilename(child.Name) {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
enc.Write(child.Name)
|
||||||
|
enc.Header.WriteByte(':')
|
||||||
|
if err := enc.Encode(child); err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
}
|
||||||
|
enc.Header.WriteByte('}')
|
||||||
|
} else {
|
||||||
|
enc.Write("size")
|
||||||
|
enc.Header.WriteByte(':')
|
||||||
|
enc.Write(e.Size)
|
||||||
|
|
||||||
|
if e.Flags&FlagExecutable != 0 {
|
||||||
|
enc.Header.WriteByte(',')
|
||||||
|
enc.WriteField("executable", true)
|
||||||
|
}
|
||||||
|
|
||||||
|
enc.Header.WriteByte(',')
|
||||||
|
if e.Flags&FlagUnpacked == 0 {
|
||||||
|
enc.WriteField("offset", strconv.FormatInt(enc.CurrentOffset, 10))
|
||||||
|
enc.CurrentOffset += e.Size
|
||||||
|
enc.Contents = append(enc.Contents, io.NewSectionReader(e.r, e.Offset+e.baseOffset, e.Size))
|
||||||
|
} else {
|
||||||
|
enc.WriteField("unpacked", true)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
enc.Header.WriteByte('}')
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// EncodeTo writes an ASAR archive containing Entry's descendants. This function
|
||||||
|
// is usally called on the root entry.
|
||||||
|
func (e *Entry) EncodeTo(w io.Writer) (n int64, err error) {
|
||||||
|
|
||||||
|
defer func() {
|
||||||
|
if r := recover(); r != nil {
|
||||||
|
if e := r.(error); e != nil {
|
||||||
|
err = e
|
||||||
|
} else {
|
||||||
|
panic(r)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}()
|
||||||
|
|
||||||
|
encoder := entryEncoder{}
|
||||||
|
{
|
||||||
|
var reserve [16]byte
|
||||||
|
encoder.Header.Write(reserve[:])
|
||||||
|
}
|
||||||
|
encoder.Encoder = json.NewEncoder(&encoder.Header)
|
||||||
|
if err = encoder.Encode(e); err != nil {
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
length := encoder.Header.Len() - 16
|
||||||
|
var newLen int
|
||||||
|
{
|
||||||
|
var padding [3]byte
|
||||||
|
if mod := length % 4; mod != 0 {
|
||||||
|
encoder.Header.Write(padding[:4-mod])
|
||||||
|
}
|
||||||
|
newLen = encoder.Header.Len() - 16
|
||||||
|
}
|
||||||
|
|
||||||
|
header := encoder.Header.Bytes()
|
||||||
|
binary.LittleEndian.PutUint32(header[:4], 4)
|
||||||
|
binary.LittleEndian.PutUint32(header[4:8], 8+uint32(newLen))
|
||||||
|
binary.LittleEndian.PutUint32(header[8:12], 4+uint32(newLen))
|
||||||
|
binary.LittleEndian.PutUint32(header[12:16], uint32(length))
|
||||||
|
|
||||||
|
n, err = encoder.Header.WriteTo(w)
|
||||||
|
if err != nil {
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, chunk := range encoder.Contents {
|
||||||
|
var written int64
|
||||||
|
written, err = io.Copy(w, chunk)
|
||||||
|
n += written
|
||||||
|
if err != nil {
|
||||||
|
return
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return
|
||||||
|
}
|
||||||
@ -0,0 +1,29 @@
|
|||||||
|
package asar // import "b612.me/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"io/ioutil"
|
||||||
|
"strings"
|
||||||
|
"testing"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestEncodeInvalidName(t *testing.T) {
|
||||||
|
root := New(".", nil, 0, 0, FlagDir)
|
||||||
|
root.Children = append(
|
||||||
|
root.Children,
|
||||||
|
New(".", strings.NewReader("test"), 4, 0, FlagNone),
|
||||||
|
)
|
||||||
|
if _, err := root.EncodeTo(ioutil.Discard); err == nil {
|
||||||
|
t.Fatal("we should have had an error")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestEncodeUnpacked(t *testing.T) {
|
||||||
|
root := New(".", nil, 0, 0, FlagDir)
|
||||||
|
root.Children = append(
|
||||||
|
root.Children,
|
||||||
|
New("sample", nil, 0, 0, FlagUnpacked),
|
||||||
|
)
|
||||||
|
if _, err := root.EncodeTo(ioutil.Discard); err != nil {
|
||||||
|
t.Fatalf("err: %s", err)
|
||||||
|
}
|
||||||
|
}
|
||||||
@ -0,0 +1,231 @@
|
|||||||
|
package asar // import "b612.me/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"errors"
|
||||||
|
"io"
|
||||||
|
"io/ioutil"
|
||||||
|
"os"
|
||||||
|
"path/filepath"
|
||||||
|
"strings"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
// Flag is a bit field of Entry flags.
|
||||||
|
type Flag uint32
|
||||||
|
|
||||||
|
const (
|
||||||
|
// FlagNone denotes an entry with no flags.
|
||||||
|
FlagNone Flag = 0
|
||||||
|
// FlagDir denotes a directory entry.
|
||||||
|
FlagDir Flag = 1 << iota
|
||||||
|
// FlagExecutable denotes a file with the executable bit set.
|
||||||
|
FlagExecutable
|
||||||
|
// FlagUnpacked denotes that the entry's contents are not included in
|
||||||
|
// the archive.
|
||||||
|
FlagUnpacked
|
||||||
|
)
|
||||||
|
|
||||||
|
// Entry is a file or a folder in an ASAR archive.
|
||||||
|
type Entry struct {
|
||||||
|
Name string
|
||||||
|
Size int64
|
||||||
|
Offset int64
|
||||||
|
Flags Flag
|
||||||
|
Parent *Entry
|
||||||
|
Children []*Entry
|
||||||
|
|
||||||
|
r io.ReaderAt
|
||||||
|
baseOffset int64
|
||||||
|
}
|
||||||
|
|
||||||
|
// New creates a new Entry.
|
||||||
|
func New(name string, ra io.ReaderAt, size, offset int64, flags Flag) *Entry {
|
||||||
|
return &Entry{
|
||||||
|
Name: name,
|
||||||
|
Size: size,
|
||||||
|
Offset: offset,
|
||||||
|
Flags: flags,
|
||||||
|
|
||||||
|
r: ra,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// FileInfo returns the os.FileInfo information about the entry.
|
||||||
|
func (e *Entry) FileInfo() os.FileInfo {
|
||||||
|
return fileInfo{e}
|
||||||
|
}
|
||||||
|
|
||||||
|
type fileInfo struct {
|
||||||
|
e *Entry
|
||||||
|
}
|
||||||
|
|
||||||
|
func (f fileInfo) Name() string {
|
||||||
|
return f.e.Name
|
||||||
|
}
|
||||||
|
|
||||||
|
func (f fileInfo) Size() int64 {
|
||||||
|
return f.e.Size
|
||||||
|
}
|
||||||
|
|
||||||
|
func (f fileInfo) Mode() os.FileMode {
|
||||||
|
if f.e.Flags&FlagDir != 0 {
|
||||||
|
return 0555 | os.ModeDir
|
||||||
|
}
|
||||||
|
|
||||||
|
if f.e.Flags&FlagExecutable != 0 {
|
||||||
|
return 0555
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0444
|
||||||
|
}
|
||||||
|
|
||||||
|
func (f fileInfo) ModTime() time.Time {
|
||||||
|
return time.Time{}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (f fileInfo) IsDir() bool {
|
||||||
|
return f.e.Flags&FlagDir != 0
|
||||||
|
}
|
||||||
|
|
||||||
|
func (f fileInfo) Sys() interface{} {
|
||||||
|
return f.e
|
||||||
|
}
|
||||||
|
|
||||||
|
// Path returns the file path to the entry.
|
||||||
|
//
|
||||||
|
// For example, given the following tree structure:
|
||||||
|
//
|
||||||
|
// root
|
||||||
|
// - sub1
|
||||||
|
// - sub2
|
||||||
|
// - file2.jpg
|
||||||
|
//
|
||||||
|
// file2.jpg's path would be:
|
||||||
|
//
|
||||||
|
// sub2/file2.jpg
|
||||||
|
func (e *Entry) Path() string {
|
||||||
|
if e.Parent == nil {
|
||||||
|
return ""
|
||||||
|
}
|
||||||
|
|
||||||
|
var p []string
|
||||||
|
|
||||||
|
for e != nil && e.Parent != nil {
|
||||||
|
p = append(p, e.Name)
|
||||||
|
e = e.Parent
|
||||||
|
}
|
||||||
|
|
||||||
|
l := len(p) / 2
|
||||||
|
for i := 0; i < l; i++ {
|
||||||
|
j := len(p) - i - 1
|
||||||
|
p[i], p[j] = p[j], p[i]
|
||||||
|
}
|
||||||
|
|
||||||
|
return strings.Join(p, "/")
|
||||||
|
}
|
||||||
|
|
||||||
|
// Open returns an *io.SectionReader of the entry's contents. nil is returned if
|
||||||
|
// the entry cannot be opened (e.g. because it is a directory).
|
||||||
|
func (e *Entry) Open() *io.SectionReader {
|
||||||
|
if e.Flags&FlagDir != 0 || e.Flags&FlagUnpacked != 0 {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
return io.NewSectionReader(e.r, e.baseOffset+e.Offset, e.Size)
|
||||||
|
}
|
||||||
|
|
||||||
|
// WriteTo writes the entry's contents to the given writer. nil is returned if the entry cannot
|
||||||
|
// be opened (e.g. if the entry is a directory).
|
||||||
|
func (e *Entry) WriteTo(w io.Writer) (n int64, err error) {
|
||||||
|
r := e.Open()
|
||||||
|
if r == nil {
|
||||||
|
return 0, errors.New("asar: entry cannot be opened")
|
||||||
|
}
|
||||||
|
return io.Copy(w, r)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Bytes returns the entry's contents as a byte slice. nil is returned if the
|
||||||
|
// entry cannot be read.
|
||||||
|
func (e *Entry) Bytes() []byte {
|
||||||
|
body := e.Open()
|
||||||
|
if body == nil {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
b, err := ioutil.ReadAll(body)
|
||||||
|
if err != nil {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
return b
|
||||||
|
}
|
||||||
|
|
||||||
|
// Bytes returns the entry's contents as a string. nil is returned if the entry
|
||||||
|
// cannot be read.
|
||||||
|
func (e *Entry) String() string {
|
||||||
|
body := e.Bytes()
|
||||||
|
if body == nil {
|
||||||
|
return ""
|
||||||
|
}
|
||||||
|
return string(body)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Find searches for a sub-entry of the current entry. nil is returned if the
|
||||||
|
// requested sub-entry cannot be found.
|
||||||
|
//
|
||||||
|
// For example, given the following tree structure:
|
||||||
|
//
|
||||||
|
// root
|
||||||
|
// - sub1
|
||||||
|
// - sub2
|
||||||
|
// - sub2.1
|
||||||
|
// - file2.jpg
|
||||||
|
//
|
||||||
|
// The following expression would return the .jpg *Entry:
|
||||||
|
//
|
||||||
|
// root.Find("sub2", "sub2.1", "file2.jpg")
|
||||||
|
func (e *Entry) Find(path ...string) *Entry {
|
||||||
|
pathLoop:
|
||||||
|
for _, name := range path {
|
||||||
|
for _, child := range e.Children {
|
||||||
|
if child.Name == name {
|
||||||
|
e = child
|
||||||
|
continue pathLoop
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
return e
|
||||||
|
}
|
||||||
|
|
||||||
|
// Walk recursively walks over the entry's children. See filepath.Walk and
|
||||||
|
// filepath.WalkFunc for more information.
|
||||||
|
func (e *Entry) Walk(walkFn filepath.WalkFunc) error {
|
||||||
|
return walk(e, "", walkFn)
|
||||||
|
}
|
||||||
|
|
||||||
|
func walk(e *Entry, parentPath string, walkFn filepath.WalkFunc) error {
|
||||||
|
for i := 0; i < len(e.Children); i++ {
|
||||||
|
child := e.Children[i]
|
||||||
|
childPath := parentPath + child.Name
|
||||||
|
|
||||||
|
err := walkFn(childPath, child.FileInfo(), nil)
|
||||||
|
if err == filepath.SkipDir {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
if child.Flags&FlagDir == 0 {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if err := walk(child, childPath+"/", walkFn); err != nil {
|
||||||
|
return err
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func validFilename(filename string) bool {
|
||||||
|
if filename == "." || filename == ".." {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
return strings.IndexAny(filename, "\x00\\/") == -1
|
||||||
|
}
|
||||||
@ -0,0 +1,212 @@
|
|||||||
|
package asar // import "b612.me/asar"
|
||||||
|
|
||||||
|
import (
|
||||||
|
"encoding/json"
|
||||||
|
"errors"
|
||||||
|
"io"
|
||||||
|
)
|
||||||
|
|
||||||
|
var (
|
||||||
|
errHeader = errors.New("asar: invalid file header")
|
||||||
|
)
|
||||||
|
|
||||||
|
type jsonReader struct {
|
||||||
|
ASAR io.ReaderAt
|
||||||
|
BaseOffset int64
|
||||||
|
D *json.Decoder
|
||||||
|
Token json.Token
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) Peek() json.Token {
|
||||||
|
if j.Token != nil {
|
||||||
|
return j.Token
|
||||||
|
}
|
||||||
|
tkn, err := j.D.Token()
|
||||||
|
if err != nil {
|
||||||
|
if err == io.EOF {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
panic(err)
|
||||||
|
}
|
||||||
|
j.Token = tkn
|
||||||
|
return tkn
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) HasDelimRune(r rune) bool {
|
||||||
|
peek := j.Peek()
|
||||||
|
ru, ok := peek.(json.Delim)
|
||||||
|
if !ok {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
if rune(ru) != r {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
return true
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) Next() json.Token {
|
||||||
|
if j.Token != nil {
|
||||||
|
t := j.Token
|
||||||
|
j.Token = nil
|
||||||
|
return t
|
||||||
|
}
|
||||||
|
|
||||||
|
tkn, err := j.D.Token()
|
||||||
|
if err != nil {
|
||||||
|
if err == io.EOF {
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
panic(err)
|
||||||
|
}
|
||||||
|
return tkn
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) NextDelimRune() rune {
|
||||||
|
tkn := j.Next()
|
||||||
|
r, ok := tkn.(json.Delim)
|
||||||
|
if !ok {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
return rune(r)
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) ExpectDelim(r rune) {
|
||||||
|
next := j.NextDelimRune()
|
||||||
|
if next != r {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) ExpectBool() bool {
|
||||||
|
tkn := j.Next()
|
||||||
|
b, ok := tkn.(bool)
|
||||||
|
if !ok {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
return b
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) ExpectString() string {
|
||||||
|
next := j.Next()
|
||||||
|
str, ok := next.(string)
|
||||||
|
if !ok {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
return str
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) ExpectStringVal(val string) {
|
||||||
|
str := j.ExpectString()
|
||||||
|
if str != val {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (j *jsonReader) ExpectInt64() int64 {
|
||||||
|
var number json.Number
|
||||||
|
switch j.Peek().(type) {
|
||||||
|
case string:
|
||||||
|
number = json.Number(j.ExpectString())
|
||||||
|
case json.Number:
|
||||||
|
number = j.Next().(json.Number)
|
||||||
|
default:
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
val, err := number.Int64()
|
||||||
|
if err != nil {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
return val
|
||||||
|
}
|
||||||
|
|
||||||
|
func parseRoot(r *jsonReader) *Entry {
|
||||||
|
entry := &Entry{
|
||||||
|
Flags: FlagDir,
|
||||||
|
}
|
||||||
|
|
||||||
|
r.ExpectDelim('{')
|
||||||
|
r.ExpectStringVal("files")
|
||||||
|
parseFiles(r, entry)
|
||||||
|
r.ExpectDelim('}')
|
||||||
|
if r.Next() != nil {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
return entry
|
||||||
|
}
|
||||||
|
|
||||||
|
func parseFiles(r *jsonReader, parent *Entry) {
|
||||||
|
r.ExpectDelim('{')
|
||||||
|
for !r.HasDelimRune('}') {
|
||||||
|
parseEntry(r, parent)
|
||||||
|
}
|
||||||
|
r.ExpectDelim('}')
|
||||||
|
}
|
||||||
|
|
||||||
|
func parseEntry(r *jsonReader, parent *Entry) {
|
||||||
|
name := r.ExpectString()
|
||||||
|
if name == "" {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
if !validFilename(name) {
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
|
||||||
|
r.ExpectDelim('{')
|
||||||
|
|
||||||
|
child := &Entry{
|
||||||
|
Name: name,
|
||||||
|
Parent: parent,
|
||||||
|
}
|
||||||
|
|
||||||
|
for !r.HasDelimRune('}') {
|
||||||
|
switch r.ExpectString() {
|
||||||
|
case "files":
|
||||||
|
child.Flags |= FlagDir
|
||||||
|
parseFiles(r, child)
|
||||||
|
case "size":
|
||||||
|
child.Size = r.ExpectInt64()
|
||||||
|
case "offset":
|
||||||
|
child.Offset = r.ExpectInt64()
|
||||||
|
case "unpacked":
|
||||||
|
if r.ExpectBool() {
|
||||||
|
child.Flags |= FlagUnpacked
|
||||||
|
}
|
||||||
|
case "executable":
|
||||||
|
if r.ExpectBool() {
|
||||||
|
child.Flags |= FlagExecutable
|
||||||
|
}
|
||||||
|
default:
|
||||||
|
panic(errHeader)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if child.Flags&FlagDir == 0 {
|
||||||
|
child.r = r.ASAR
|
||||||
|
child.baseOffset = r.BaseOffset
|
||||||
|
}
|
||||||
|
|
||||||
|
parent.Children = append(parent.Children, child)
|
||||||
|
r.ExpectDelim('}')
|
||||||
|
}
|
||||||
|
|
||||||
|
func decodeHeader(asar io.ReaderAt, header *io.SectionReader, offset int64) (entry *Entry, err error) {
|
||||||
|
decoder := json.NewDecoder(header)
|
||||||
|
decoder.UseNumber()
|
||||||
|
reader := jsonReader{
|
||||||
|
ASAR: asar,
|
||||||
|
BaseOffset: offset,
|
||||||
|
D: decoder,
|
||||||
|
}
|
||||||
|
defer func() {
|
||||||
|
if r := recover(); r != nil {
|
||||||
|
if e := r.(error); e != nil {
|
||||||
|
err = e
|
||||||
|
} else {
|
||||||
|
panic(r)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}()
|
||||||
|
entry = parseRoot(&reader)
|
||||||
|
return
|
||||||
|
}
|
||||||
@ -0,0 +1,20 @@
|
|||||||
|
Copyright (c) 2014 GitHub Inc.
|
||||||
|
|
||||||
|
Permission is hereby granted, free of charge, to any person obtaining
|
||||||
|
a copy of this software and associated documentation files (the
|
||||||
|
"Software"), to deal in the Software without restriction, including
|
||||||
|
without limitation the rights to use, copy, modify, merge, publish,
|
||||||
|
distribute, sublicense, and/or sell copies of the Software, and to
|
||||||
|
permit persons to whom the Software is furnished to do so, subject to
|
||||||
|
the following conditions:
|
||||||
|
|
||||||
|
The above copyright notice and this permission notice shall be
|
||||||
|
included in all copies or substantial portions of the Software.
|
||||||
|
|
||||||
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||||||
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||||
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||||||
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
||||||
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
||||||
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
||||||
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||||
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@ -0,0 +1 @@
|
|||||||
|
file one.
|
||||||
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|
After Width: | Height: | Size: 182 B |
@ -0,0 +1 @@
|
|||||||
|
123
|
||||||
@ -0,0 +1 @@
|
|||||||
|
file0 content
|
||||||
Loading…
Reference in New Issue