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nim-json-rpc
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work around Nim 2.0.10 issue (#225) 

* work around Nim 2.0.10 issue

* adjust Json/JSON capitalization in tests
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tersec 2024-10-04 03:50:33 +00:00 committed by GitHub
parent 9da5b609bf
commit be16a6528a
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2 changed files with 18 additions and 10 deletions
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26
json_rpc/private/server_handler_wrapper.nim
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@ -41,7 +41,7 @@ template rpc_isOptional[T](_: options.Option[T]): bool = true
# Run time helpers
# ------------------------------------------------------------------------------
proc unpackArg(args: JsonString, argName: string, argType: type): argType
func unpackArg(args: JsonString, argName: string, argType: type): argType
{.gcsafe, raises: [JsonRpcError].} =
## This where input parameters are decoded from JSON into
## Nim data types
@ -89,8 +89,16 @@ template expectOptionalParamsLen(params: RequestParamsRx,
template expectParamsLen(params: RequestParamsRx, length: static[int]) =
## Make sure positional params meets the handler expectation
# https://github.com/nim-lang/Nim/issues/24228 especially in a Chronos async
# context, with `{.compileTime.}` `$` `int`, `uint64`, and `int64` overloads
# https://github.com/nim-lang/Nim/blob/v2.0.10/lib/system/dollars.nim#L28-L34
# provides for for compile-time evaluation from, can cause JSON-RPC code not
# to compile. Explicitly choose the non-CTFE overloads, which do not trigger
# this Nim issue.
let
expected = "Expected " & $length & " Json parameter(s) but got "
nonConstLength = length
expected = "Expected " & $nonConstLength & " JSON parameter(s) but got "
if params.positional.len != length:
raise newException(RequestDecodeError,
@ -141,11 +149,11 @@ template unpackPositional(params: RequestParamsRx,
else:
# mandatory args
# A and C fall into this category
# unpack Nim type and assign from json
# unpack Nim type and assign from JSON
if params.notNull(pos):
innerNode()
proc makeType(typeName, params: NimNode): NimNode =
func makeType(typeName, params: NimNode): NimNode =
## Generate type section contains an object definition
## with fields of handler params
let typeSec = quote do:
@ -159,14 +167,14 @@ proc makeType(typeName, params: NimNode): NimNode =
obj[2] = recList
typeSec
proc makeParams(retType: NimNode, params: NimNode): seq[NimNode] =
func makeParams(retType: NimNode, params: NimNode): seq[NimNode] =
## Convert rpc params into handler params
result.add retType
if params.len > 1:
for i in 1..<params.len:
result.add params[i]
proc makeHandler(procName, params, procBody, returnInner: NimNode): NimNode =
func makeHandler(procName, params, procBody, returnInner: NimNode): NimNode =
## Generate rpc handler proc
let
returnType = quote do: Future[`returnInner`]
@ -180,7 +188,7 @@ proc makeHandler(procName, params, procBody, returnInner: NimNode): NimNode =
pragmas = pragmas
)
proc ofStmt(x, paramsObj, paramName, paramType: NimNode): NimNode =
func ofStmt(x, paramsObj, paramName, paramType: NimNode): NimNode =
let caseStr = $paramName
result = nnkOfBranch.newTree(
quote do: `caseStr`,
@ -188,7 +196,7 @@ proc ofStmt(x, paramsObj, paramName, paramType: NimNode): NimNode =
`paramsObj`.`paramName` = unpackArg(`x`.value, `caseStr`, `paramType`)
)
proc setupNamed(paramsObj, paramsIdent, params: NimNode): NimNode =
func setupNamed(paramsObj, paramsIdent, params: NimNode): NimNode =
let x = ident"x"
var caseStmt = nnkCaseStmt.newTree(
@ -206,7 +214,7 @@ proc setupNamed(paramsObj, paramsIdent, params: NimNode): NimNode =
for `x` in `paramsIdent`.named:
`caseStmt`
proc wrapServerHandler*(methName: string, params, procBody, procWrapper: NimNode): NimNode =
func wrapServerHandler*(methName: string, params, procBody, procWrapper: NimNode): NimNode =
## This proc generate something like this:
##
## proc rpcHandler(paramA: ParamAType, paramB: ParamBType): Future[ReturnType] =

2
tests/test_router_rpc.nim
View File

@ -123,7 +123,7 @@ suite "rpc router":
test "no params with params":
let n = req("noParams", "[123]")
let res = waitFor server.route(n)
check res == """{"jsonrpc":"2.0","id":0,"error":{"code":-32000,"message":"`noParams` raised an exception","data":"Expected 0 Json parameter(s) but got 1"}}"""
check res == """{"jsonrpc":"2.0","id":0,"error":{"code":-32000,"message":"`noParams` raised an exception","data":"Expected 0 JSON parameter(s) but got 1"}}"""
test_optional("std_option")
test_optional("results_opt")