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View Code? Open in Web Editor NEWPackage asar reads and writes ASAR (Atom-Shell Archive) archives for Go (golang)
Home Page: https://godoc.org/layeh.com/asar
License: Mozilla Public License 2.0
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Add more tests
Add example for encoding/writing ASAR files
Based on the given documentation/tests, I struggle implementing a way to encode and write the contents of a directory to an ASAR file.
Would it be possible to extend the documentation, as to make it more clear how to achieve writing ASAR files?
Cannot Reencode ASAR
I've found that opening an ASAR file and attempting to reencode it directly leads to issues on the archive format.
When attempting to decode an ASAR generated with this library, I get the following error;
invalid character '\x00' looking for beginning of value
Electron doesn't want to open this file either and asar crashes with a stack error.
I suspect the header might be wrongly encoded.
Does not support addon
If there is addon in asar, it cannot be decompressed.
e.g: ps-list \ node-raw-socket
My asar contains these two packages, but after extracting them, the directory is empty:
I added some logs to the code, the code looks like this:
realPath := filepath.Join(target, path)
if entry.Flags&asar.FlagDir != 0 {
return os.MkdirAll(realPath, 0755)
}
if entry.Flags&asar.FlagUnpacked != 0 {
fmt.Println("x1")
fmt.Println(path)
fmt.Println(realPath)
return nil
}The output of the console is:
When I use electron/asar, there is no problem
read corruption
I have a test scenario where reading an ASAR file generated by electron-builder "succeeds" but produces corrupt output.
Go code:
func TestAsar(t *testing.T) {
p := "/tmp/app.asar"
f, err := os.Open(p)
if err != nil {
t.Fatal(err)
}
e, err := asar.Decode(f)
if err != nil {
t.Fatal(err)
}
homeE := e.Find("public", "home.html")
r := homeE.Open()
b, err := ioutil.ReadAll(r)
if err != nil {
t.Fatal(err)
}
log.Printf("b: %s", b)
}
Produces output like:
=== RUN TestAsar
2017/06/26 16:43:43 b: tml>
<head>
.
.
.
</body>
</html>
<h
--- PASS: TestAsar (0.00s)
As you can see it has cut off 2 bytes at the start of the file and there are an extra 2 bytes at the end (I can't tell if those last two bytes are the 2 bytes of this same file or another html file).
The .asar file is 17mb and not something I want to post publicly but if you are able to take a look I can share with you on DropBox or other similar way.
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