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nim twirp service experiment
This commit is contained in:
Oskar Thoren
parent
d7ab72bcbd
commit
85be50d903
@ -98,3 +98,7 @@ Actually use them, and check enum and dispatching etc.
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Put in Makefile
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nimble install https://github.com/PMunch/protobuf-nim
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### Protobuf service generation
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Install `nimtwirp`, then:
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`nimtwirp_build -I:. --out:. protocol.proto `
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237
remote_log/hello-twirp/protocol_pb.nim
Normal file
237
remote_log/hello-twirp/protocol_pb.nim
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@ -0,0 +1,237 @@
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# Generated by protoc_gen_nim. Do not edit!
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import base64
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import intsets
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import json
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import strutils
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import nimpb/nimpb
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import nimpb/json as nimpb_json
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type
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vac_cas_CASRequest* = ref vac_cas_CASRequestObj
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vac_cas_CASRequestObj* = object of Message
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id: string
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vac_cas_CASResponse* = ref vac_cas_CASResponseObj
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vac_cas_CASResponseObj* = object of Message
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id: string
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data: string
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proc newvac_cas_CASResponse*(): vac_cas_CASResponse
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proc newvac_cas_CASResponse*(data: string): vac_cas_CASResponse
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proc newvac_cas_CASResponse*(data: seq[byte]): vac_cas_CASResponse
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proc writevac_cas_CASResponse*(stream: Stream, message: vac_cas_CASResponse)
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proc readvac_cas_CASResponse*(stream: Stream): vac_cas_CASResponse
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proc sizeOfvac_cas_CASResponse*(message: vac_cas_CASResponse): uint64
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proc toJson*(message: vac_cas_CASResponse): JsonNode
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proc parsevac_cas_CASResponse*(obj: JsonNode): vac_cas_CASResponse
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proc newvac_cas_CASRequest*(): vac_cas_CASRequest
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proc newvac_cas_CASRequest*(data: string): vac_cas_CASRequest
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proc newvac_cas_CASRequest*(data: seq[byte]): vac_cas_CASRequest
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proc writevac_cas_CASRequest*(stream: Stream, message: vac_cas_CASRequest)
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proc readvac_cas_CASRequest*(stream: Stream): vac_cas_CASRequest
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proc sizeOfvac_cas_CASRequest*(message: vac_cas_CASRequest): uint64
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proc toJson*(message: vac_cas_CASRequest): JsonNode
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proc parsevac_cas_CASRequest*(obj: JsonNode): vac_cas_CASRequest
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proc fullyQualifiedName*(T: typedesc[vac_cas_CASResponse]): string = "vac.cas.CASResponse"
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proc readvac_cas_CASResponseImpl(stream: Stream): Message = readvac_cas_CASResponse(stream)
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proc writevac_cas_CASResponseImpl(stream: Stream, msg: Message) = writevac_cas_CASResponse(stream, vac_cas_CASResponse(msg))
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proc toJsonvac_cas_CASResponseImpl(msg: Message): JsonNode = toJson(vac_cas_CASResponse(msg))
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proc fromJsonvac_cas_CASResponseImpl(node: JsonNode): Message = parsevac_cas_CASResponse(node)
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proc vac_cas_CASResponseProcs*(): MessageProcs =
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result.readImpl = readvac_cas_CASResponseImpl
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result.writeImpl = writevac_cas_CASResponseImpl
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result.toJsonImpl = toJsonvac_cas_CASResponseImpl
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result.fromJsonImpl = fromJsonvac_cas_CASResponseImpl
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proc newvac_cas_CASResponse*(): vac_cas_CASResponse =
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new(result)
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initMessage(result[])
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result.procs = vac_cas_CASResponseProcs()
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result.id = ""
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result.data = ""
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proc clearid*(message: vac_cas_CASResponse) =
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message.id = ""
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proc setid*(message: vac_cas_CASResponse, value: string) =
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message.id = value
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proc id*(message: vac_cas_CASResponse): string {.inline.} =
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message.id
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proc `id=`*(message: vac_cas_CASResponse, value: string) {.inline.} =
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setid(message, value)
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proc cleardata*(message: vac_cas_CASResponse) =
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message.data = ""
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proc setdata*(message: vac_cas_CASResponse, value: string) =
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message.data = value
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proc data*(message: vac_cas_CASResponse): string {.inline.} =
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message.data
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proc `data=`*(message: vac_cas_CASResponse, value: string) {.inline.} =
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setdata(message, value)
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proc sizeOfvac_cas_CASResponse*(message: vac_cas_CASResponse): uint64 =
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if len(message.id) > 0:
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result = result + sizeOfTag(2, WireType.LengthDelimited)
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result = result + sizeOfString(message.id)
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if len(message.data) > 0:
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result = result + sizeOfTag(3, WireType.LengthDelimited)
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result = result + sizeOfString(message.data)
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result = result + sizeOfUnknownFields(message)
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proc writevac_cas_CASResponse*(stream: Stream, message: vac_cas_CASResponse) =
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if len(message.id) > 0:
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protoWriteString(stream, message.id, 2)
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if len(message.data) > 0:
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protoWriteString(stream, message.data, 3)
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writeUnknownFields(stream, message)
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proc readvac_cas_CASResponse*(stream: Stream): vac_cas_CASResponse =
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result = newvac_cas_CASResponse()
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while not atEnd(stream):
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let
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tag = readTag(stream)
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wireType = wireType(tag)
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case fieldNumber(tag)
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of 0:
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raise newException(InvalidFieldNumberError, "Invalid field number: 0")
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of 2:
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expectWireType(wireType, WireType.LengthDelimited)
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setid(result, protoReadString(stream))
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of 3:
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expectWireType(wireType, WireType.LengthDelimited)
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setdata(result, protoReadString(stream))
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else: readUnknownField(stream, result, tag)
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proc toJson*(message: vac_cas_CASResponse): JsonNode =
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result = newJObject()
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if len(message.id) > 0:
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result["id"] = %message.id
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if len(message.data) > 0:
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result["data"] = %message.data
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proc parsevac_cas_CASResponse*(obj: JsonNode): vac_cas_CASResponse =
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result = newvac_cas_CASResponse()
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var node: JsonNode
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if obj.kind != JObject:
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raise newException(nimpb_json.ParseError, "object expected")
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node = getJsonField(obj, "id", "id")
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if node != nil and node.kind != JNull:
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setid(result, parseString(node))
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node = getJsonField(obj, "data", "data")
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if node != nil and node.kind != JNull:
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setdata(result, parseString(node))
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proc serialize*(message: vac_cas_CASResponse): string =
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let
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ss = newStringStream()
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writevac_cas_CASResponse(ss, message)
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result = ss.data
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proc newvac_cas_CASResponse*(data: string): vac_cas_CASResponse =
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let
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ss = newStringStream(data)
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result = readvac_cas_CASResponse(ss)
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proc newvac_cas_CASResponse*(data: seq[byte]): vac_cas_CASResponse =
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let
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ss = newStringStream(cast[string](data))
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result = readvac_cas_CASResponse(ss)
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proc fullyQualifiedName*(T: typedesc[vac_cas_CASRequest]): string = "vac.cas.CASRequest"
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proc readvac_cas_CASRequestImpl(stream: Stream): Message = readvac_cas_CASRequest(stream)
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proc writevac_cas_CASRequestImpl(stream: Stream, msg: Message) = writevac_cas_CASRequest(stream, vac_cas_CASRequest(msg))
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proc toJsonvac_cas_CASRequestImpl(msg: Message): JsonNode = toJson(vac_cas_CASRequest(msg))
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proc fromJsonvac_cas_CASRequestImpl(node: JsonNode): Message = parsevac_cas_CASRequest(node)
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proc vac_cas_CASRequestProcs*(): MessageProcs =
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result.readImpl = readvac_cas_CASRequestImpl
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result.writeImpl = writevac_cas_CASRequestImpl
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result.toJsonImpl = toJsonvac_cas_CASRequestImpl
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result.fromJsonImpl = fromJsonvac_cas_CASRequestImpl
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proc newvac_cas_CASRequest*(): vac_cas_CASRequest =
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new(result)
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initMessage(result[])
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result.procs = vac_cas_CASRequestProcs()
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result.id = ""
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proc clearid*(message: vac_cas_CASRequest) =
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message.id = ""
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proc setid*(message: vac_cas_CASRequest, value: string) =
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message.id = value
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proc id*(message: vac_cas_CASRequest): string {.inline.} =
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message.id
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proc `id=`*(message: vac_cas_CASRequest, value: string) {.inline.} =
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setid(message, value)
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proc sizeOfvac_cas_CASRequest*(message: vac_cas_CASRequest): uint64 =
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if len(message.id) > 0:
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result = result + sizeOfTag(2, WireType.LengthDelimited)
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result = result + sizeOfString(message.id)
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result = result + sizeOfUnknownFields(message)
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proc writevac_cas_CASRequest*(stream: Stream, message: vac_cas_CASRequest) =
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if len(message.id) > 0:
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protoWriteString(stream, message.id, 2)
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writeUnknownFields(stream, message)
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proc readvac_cas_CASRequest*(stream: Stream): vac_cas_CASRequest =
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result = newvac_cas_CASRequest()
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while not atEnd(stream):
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let
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tag = readTag(stream)
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wireType = wireType(tag)
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case fieldNumber(tag)
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of 0:
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raise newException(InvalidFieldNumberError, "Invalid field number: 0")
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of 2:
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expectWireType(wireType, WireType.LengthDelimited)
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setid(result, protoReadString(stream))
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else: readUnknownField(stream, result, tag)
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proc toJson*(message: vac_cas_CASRequest): JsonNode =
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result = newJObject()
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if len(message.id) > 0:
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result["id"] = %message.id
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proc parsevac_cas_CASRequest*(obj: JsonNode): vac_cas_CASRequest =
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result = newvac_cas_CASRequest()
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var node: JsonNode
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if obj.kind != JObject:
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raise newException(nimpb_json.ParseError, "object expected")
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node = getJsonField(obj, "id", "id")
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if node != nil and node.kind != JNull:
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setid(result, parseString(node))
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proc serialize*(message: vac_cas_CASRequest): string =
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let
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ss = newStringStream()
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writevac_cas_CASRequest(ss, message)
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result = ss.data
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proc newvac_cas_CASRequest*(data: string): vac_cas_CASRequest =
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let
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ss = newStringStream(data)
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result = readvac_cas_CASRequest(ss)
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proc newvac_cas_CASRequest*(data: seq[byte]): vac_cas_CASRequest =
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let
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ss = newStringStream(cast[string](data))
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result = readvac_cas_CASRequest(ss)
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112
remote_log/hello-twirp/protocol_twirp.nim
Normal file
112
remote_log/hello-twirp/protocol_twirp.nim
Normal file
@ -0,0 +1,112 @@
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import asyncdispatch
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import asynchttpserver
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import httpclient
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import json
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import strutils
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import protocol_pb
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import nimtwirp/nimtwirp
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import nimtwirp/errors
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const
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CASPrefix* = "/twirp/vac.cas.CAS/"
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type
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CAS* = ref CASObj
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CASObj* = object of RootObj
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GetImpl*: proc (service: CAS, param: vac_cas_CASRequest): Future[vac_cas_CASResponse] {.gcsafe, closure.}
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PostImpl*: proc (service: CAS, param: vac_cas_CASRequest): Future[vac_cas_CASResponse] {.gcsafe, closure.}
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proc Get*(service: CAS, param: vac_cas_CASRequest): Future[vac_cas_CASResponse] {.async.} =
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if service.GetImpl == nil:
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raise newTwirpError(TwirpUnimplemented, "Get is not implemented")
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result = await service.GetImpl(service, param)
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proc Post*(service: CAS, param: vac_cas_CASRequest): Future[vac_cas_CASResponse] {.async.} =
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if service.PostImpl == nil:
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raise newTwirpError(TwirpUnimplemented, "Post is not implemented")
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result = await service.PostImpl(service, param)
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proc newCAS*(): CAS =
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new(result)
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proc handleRequest*(service: CAS, req: Request): Future[nimtwirp.Response] {.async.} =
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let (contentType, methodName) = validateRequest(req, CASPrefix)
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if methodName == "Get":
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var inputMsg: vac_cas_CASRequest
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if contentType == "application/protobuf":
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inputMsg = newvac_cas_CASRequest(req.body)
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elif contentType == "application/json":
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let node = parseJson(req.body)
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inputMsg = parsevac_cas_CASRequest(node)
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let outputMsg = await Get(service, inputMsg)
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if contentType == "application/protobuf":
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return nimtwirp.newResponse(serialize(outputMsg))
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elif contentType == "application/json":
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return nimtwirp.newResponse(toJson(outputMsg))
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elif methodName == "Post":
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var inputMsg: vac_cas_CASRequest
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if contentType == "application/protobuf":
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inputMsg = newvac_cas_CASRequest(req.body)
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elif contentType == "application/json":
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let node = parseJson(req.body)
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inputMsg = parsevac_cas_CASRequest(node)
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let outputMsg = await Post(service, inputMsg)
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if contentType == "application/protobuf":
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return nimtwirp.newResponse(serialize(outputMsg))
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elif contentType == "application/json":
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return nimtwirp.newResponse(toJson(outputMsg))
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else:
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raise newTwirpError(TwirpBadRoute, "unknown method")
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type
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CASClient* = ref object of nimtwirp.Client
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proc newCASClient*(address: string, kind = ClientKind.Protobuf): CASClient =
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new(result)
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result.client = newHttpClient()
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result.kind = kind
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case kind
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of ClientKind.Protobuf:
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result.client.headers = newHttpHeaders({"Content-Type": "application/protobuf"})
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of ClientKind.Json:
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result.client.headers = newHttpHeaders({"Content-Type": "application/json"})
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result.address = address
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proc Get*(client: CASClient, req: vac_cas_CASRequest): vac_cas_CASResponse =
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var body: string
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case client.kind
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of ClientKind.Protobuf:
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body = serialize(req)
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of ClientKind.Json:
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body = $toJson(req)
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let resp = request(client, CASPrefix, "Get", body)
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case client.kind
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of ClientKind.Protobuf:
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result = newvac_cas_CASResponse(resp.body)
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of ClientKind.Json:
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result = parsevac_cas_CASResponse(parseJson(resp.body))
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proc Post*(client: CASClient, req: vac_cas_CASRequest): vac_cas_CASResponse =
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var body: string
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case client.kind
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of ClientKind.Protobuf:
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body = serialize(req)
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of ClientKind.Json:
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body = $toJson(req)
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let resp = request(client, CASPrefix, "Post", body)
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case client.kind
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of ClientKind.Protobuf:
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result = newvac_cas_CASResponse(resp.body)
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of ClientKind.Json:
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result = parsevac_cas_CASResponse(parseJson(resp.body))
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