Routing error with stub endpoint and dynamic endpoint sharing root path

[Rayzen]

Hi, I'm jut trying to write a KrakenD gateway config, but I'm facing a really strange behaviour.
This is the config I'm trying to implement

{
.....
"endpoints": [
{
"endpoint": "/myresource/{id1}/mysubresource/{id2}",
"output_encoding": "no-op",
"method": "GET",
"headers_to_pass": ["*"],
"querystring_params": ["*"],
"backend": [
{
"encoding": "no-op",
"host": [
"http://mybackend.local"
],
"url_pattern": "/mysubresource/{id1}-{id2}",
"method": "GET"
}
],
},
{
"endpoint": "/myresource/MYID/mysubresource",
"output_encoding": "no-op",
"method": "GET",
"headers_to_pass": ["*"],
"querystring_params": ["*"],
"backend": [
{
"encoding": "no-op",
"host": [
"http://mybackend.local"
],
"url_pattern": "/myresource/MYID/mysubresource",
"method": "GET"
}
],
}
]
}

The /myresource/MYID/mysubresource is a stub endpoint with mocked data, since the backend is not ready, but the final one should be /myresource/{id1}/mysubresource.

The /myresource/{id1}/mysubresource/{id2} instead is a real no-op endpoint.

So if I do a GET on /myresource/MYID/mysubresource or /myresource/MYID1/mysubresource/MYID2 (the first pathVariable is different) everything works fine, but if I do a GET on /myresource/MYID/mysubresource/MYID2 I have this error on krakend logs and no response:

2022/02/21 17:08:22 DEBUG: [2022/02/21 17:08:22 Handler: Actual request
2022/02/21 17:08:22 DEBUG: [2022/02/21 17:08:22 Actual request no headers added: missing origin
2022/02/21 17:08:22 http: panic serving 10.102.207.55:35290: invalid node type
goroutine 45 [running]:
net/http.(*conn).serve.func1(0xc000b18000)
/usr/local/go/src/net/http/server.go:1824 +0x153
panic(0x2415d00, 0x2d84640)
/usr/local/go/src/runtime/panic.go:971 +0x499
github.com/gin-gonic/gin.(*node).findCaseInsensitivePathRec(0xc0004dc850, 0xc000570039, 0x1a, 0xc0000ce300, 0x5, 0x80, 0xa6e69010000002f, 0x0, 0x0, 0x0)
/go/pkg/mod/github.com/gin-gonic/gin@v1.7.2/tree.go:790 +0x109b
github.com/gin-gonic/gin.(*node).findCaseInsensitivePathRec(0xc0004dc7e0, 0xc000570035, 0x1e, 0xc0000ce300, 0x1, 0x80, 0x10000002f, 0x7f057ff6f4a0, 0x7f055813bb01, 0x101000000000000)
/go/pkg/mod/github.com/gin-gonic/gin@v1.7.2/tree.go:706 +0x8af
github.com/gin-gonic/gin.(*node).findCaseInsensitivePathRec(0xc0004c2690, 0xc000570034, 0x1f, 0xc0000ce300, 0x0, 0x80, 0x100000073, 0xc000724601, 0xc0009347c0, 0x0)
/go/pkg/mod/github.com/gin-gonic/gin@v1.7.2/tree.go:706 +0x8af
github.com/gin-gonic/gin.(*node).findCaseInsensitivePath(0xc0004c2690, 0xc000570034, 0x1f, 0x1, 0x1a, 0x203000, 0xc, 0x2)
/go/pkg/mod/github.com/gin-gonic/gin@v1.7.2/tree.go:597 +0xb6
github.com/gin-gonic/gin.redirectFixedPath(0xc0008ec100, 0xc0004c2690, 0x1, 0xc000db0060)
/go/pkg/mod/github.com/gin-gonic/gin@v1.7.2/gin.go:557 +0x77
github.com/gin-gonic/gin.(*Engine).handleHTTPRequest(0xc0003b5a00, 0xc0008ec100)
/go/pkg/mod/github.com/gin-gonic/gin@v1.7.2/gin.go:498 +0x60d
github.com/gin-gonic/gin.(*Engine).ServeHTTP(0xc0003b5a00, 0x2de4d10, 0xc000aca000, 0xc0008ec000)
/go/pkg/mod/github.com/gin-gonic/gin@v1.7.2/gin.go:445 +0x15c
github.com/rs/cors.(*Cors).Handler.func1(0x2de4d10, 0xc000aca000, 0xc0008ec000)
/go/pkg/mod/github.com/rs/cors@v1.6.0/cors.go:207 +0x1b1
net/http.HandlerFunc.ServeHTTP(0xc000abfb00, 0x2de4d10, 0xc000aca000, 0xc0008ec000)
/usr/local/go/src/net/http/server.go:2069 +0x44
github.com/rs/cors.(*Cors).Handler.func1(0x2de4d10, 0xc000aca000, 0xc0008ec000)
/go/pkg/mod/github.com/rs/cors@v1.6.0/cors.go:207 +0x1b1
net/http.HandlerFunc.ServeHTTP(0xc000abfbc0, 0x2de4d10, 0xc000aca000, 0xc0008ec000)
/usr/local/go/src/net/http/server.go:2069 +0x44
net/http.serverHandler.ServeHTTP(0xc0009282a0, 0x2de4d10, 0xc000aca000, 0xc0008ec000)
/usr/local/go/src/net/http/server.go:2887 +0xa3
net/http.(*conn).serve(0xc000b18000, 0x2ded2f0, 0xc0001281c0)
/usr/local/go/src/net/http/server.go:1952 +0x8cd
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go:3013 +0x39b

It seems like krakend it's messing up with routing request to the right endpoint, since /myresource/MYID/mysubresource and /myresource/MYID/mysubresource/MYID2 share the same root path, but I find quite strange that it breaks up on the latter endpoint example rather than on the former one...

[Rayzen]

Ok I did more investigation and updated previous comment and title due they were misleading

[alombarte]

See #325 and #386

[alex-pobeditel-2004]

Hello @alombarte!

Issues mentioned by you are marked as closed but now I experience the same problem as @Rayzen on krakend 2.0.0.
gin@v1.7.7 is mentioned in logs.
Was this problem actually solved?

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