Comments (3)
dhubler
commented on July 28, 2024
1.) I think you want either PATCH or PUT because you are not creating
a new data structure
2.) I also think you need the ":" and the end
curl -X PATCH -d '{"message": "normal text"}'
http://localhost:8080/restconf/data/hello:
…On Tue, Apr 9, 2024 at 8:47 AM bart ***@***.***> wrote:
Hey!
I've been playing around with FreeCONF for some days. In general I like
it, and it really helps me to get a better understanding of YANG and
RESTCONF. Today I tried to patch/put/post data to a binary leaf, without
success. Perhaps you could point me to a solution?
Approach: I follow the "Getting started"
<https://freeconf.org/docs/gettingstarted/> tutorial and change the type
of message into type binary;. If I start the server, I get the following
error:
Starting server...Traceback (most recent call last): File ".../freeconf/server.py", line 62, in <module> browser = main() File ".../freeconf/server.py", line 55, in main dev.apply_startup_config_file("./startup.json") File ".../freeconf/.venv/lib/python3.10/site-packages/freeconf/device.py", line 26, in apply_startup_config_file self.__apply_startup_config_stream(self.driver.fs.new_rdr_file(configFile)) File ".../freeconf/.venv/lib/python3.10/site-packages/freeconf/device.py", line 36, in __apply_startup_config_stream self.driver.g_device.ApplyStartupConfig(req) File ".../freeconf/.venv/lib/python3.10/site-packages/grpc/_channel.py", line 1176, in __call__ return _end_unary_response_blocking(state, call, False, None) File ".../freeconf/.venv/lib/python3.10/site-packages/grpc/_channel.py", line 1005, in _end_unary_response_blocking raise _InactiveRpcError(state) # pytype: disable=not-instantiablegrpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with: status = StatusCode.UNKNOWN details = "cannot coerse 'string' to binary value" debug_error_string = "UNKNOWN:Error received from peer {created_time:"2024-04-09T14:41:51.964747905+02:00", grpc_status:2, grpc_message:"cannot coerse \'string\' to binary value"}"
>
So that didn't go very well. For now, I can remove the "message" key from
./startup.json (so "hello: {}") and start the server again without
issues. Then, I try to POST a base64-encoded string as described in
RFC7950 <https://www.rfc-editor.org/rfc/rfc7950#section-9.8> as follows:
# base64 encoding of "Hello, world!"curl -X POST -d '{"message": "SGVsbG8sIHdvcmxkIQ=="}' http://localhost:8080/restconf/data/hello
which returns
cannot coerse 'string' to binary value
Is base64 decoding of JSON strings for binary types not implemented? If it
is, what am I doing wrong?
Looking forward to your help.
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b-kamphorst
commented on July 28, 2024
Thank you for your quick response! Your suggestions do cause me to get another error.
If I do NOT define "message" in the startup file, I get the following for a PUT request:
client
$ curl -X PUT -d '{"hello:message": "R29vZGJ5ZSwgd29ybGQh"}' http://localhost:8080/restconf/data/hello:
curl: (52) Empty reply from serverserver
Starting server...
Serving. Press Ctrl+C to exit.
2024/04/11 15:46:06 http: panic serving 127.0.0.1:46410: runtime error: invalid memory address or nil pointer dereference
goroutine 28 [running]:
net/http.(*conn).serve.func1()
/opt/hostedtoolcache/go/1.20.10/x64/src/net/http/server.go:1854 +0xbf
panic({0xa213a0, 0xff7530})
/opt/hostedtoolcache/go/1.20.10/x64/src/runtime/panic.go:890 +0x263
github.com/freeconf/yang/node.(*Selection).Delete(0xc0005773b0)
/home/runner/go/pkg/mod/github.com/freeconf/[email protected]/node/selection.go:400 +0x20d
github.com/freeconf/yang/node.(*Selection).ReplaceFrom(0xc000366700?, {0xbe7038, 0xc0001523f0})
/home/runner/go/pkg/mod/github.com/freeconf/[email protected]/node/selection.go:469 +0x2c
github.com/freeconf/restconf.(*browserHandler).ServeHTTP(0xc0000141f0, {0x1, 0x1, 0x1, 0x1, 0x1}, {0xbe2c80?, 0xc00056ee70?}, {0xbe1ee0, 0xc0003541c0}, ...)
/home/runner/go/pkg/mod/github.com/freeconf/[email protected]/browser_handler.go:175 +0xcd8
github.com/freeconf/restconf.(*Server).serve(0xc00003a725?, {0x1, 0x1, 0x1, 0x1, 0x1}, {0xbe2c80, 0xc00056ee70}, {0xbe3770, 0xc0002ba8d0}, ...)
/home/runner/go/pkg/mod/github.com/freeconf/[email protected]/server.go:243 +0x125
github.com/freeconf/restconf.(*Server).ServeHTTP(0xc0002b4500, {0xbe1ee0, 0xc0003541c0}, 0xc000366700)
/home/runner/go/pkg/mod/github.com/freeconf/[email protected]/server.go:185 +0xb6c
net/http.serverHandler.ServeHTTP({0xbe08b0?}, {0xbe1ee0, 0xc0003541c0}, 0xc000366700)
/opt/hostedtoolcache/go/1.20.10/x64/src/net/http/server.go:2936 +0x316
net/http.(*conn).serve(0xc0001c8fc0, {0xbe2c80, 0xc000584060})
/opt/hostedtoolcache/go/1.20.10/x64/src/net/http/server.go:1995 +0x612
created by net/http.(*Server).Serve
/opt/hostedtoolcache/go/1.20.10/x64/src/net/http/server.go:3089 +0x5edA PATCH request works much better:
client
curl -X PATCH -d '{"hello:message": "R29vZGJ5ZSwgd29ybGQh"}' http://localhost:8080/restconf/data/hello:
cannot coerse 'string' to binary valueNo terminal output on server side. So this seems to be the correct request, apart from the fact that the string is not decoded with base64.
On the other hand, if I define "message": "SGVsbG8sIHdvcmxkIQ==" in the startup file then I get the same "cannot coerse 'string' to binary value" as before on server side.
To me it looks like an issue in the base64 JSON string to binary parsing (invocation / logic / ...)? The inputs should be valid base64.
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b-kamphorst
commented on July 28, 2024
Note: I just tried the Go implementation, and everything seems to work fine there.
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