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allow users to inject their own jsonRpc customizations #40

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Sep 21, 2022
Merged

allow users to inject their own jsonRpc customizations #40

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18 changes: 12 additions & 6 deletions src/LanguageServerProtocol.fs
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@ module Server =
open Newtonsoft.Json
open Ionide.LanguageServerProtocol.JsonUtils
open Newtonsoft.Json.Linq
open StreamJsonRpc

let logger = LogProvider.getLoggerByName "LSP Server"

Expand Down Expand Up @@ -77,23 +78,28 @@ module Server =
| ErrorExitWithoutShutdown = 1
| ErrorStreamClosed = 2


/// The default RPC logic shipped with this library. All this does is mark LocalRpcExceptions as non-fatal
let defaultRpc (handler: IJsonRpcMessageHandler) =
{ new JsonRpc(handler) with
member this.IsFatalException(ex: Exception) =
match ex with
| :? LocalRpcException -> false
| _ -> true }

let startWithSetup<'client when 'client :> Ionide.LanguageServerProtocol.ILspClient>
(setupRequestHandlings: 'client -> Map<string, Delegate>)
(input: Stream)
(output: Stream)
(clientCreator: (ClientNotificationSender * ClientRequestSender) -> 'client)
(customizeRpc: IJsonRpcMessageHandler -> JsonRpc)
=

use jsonRpcHandler = new HeaderDelimitedMessageHandler(output, input, jsonRpcFormatter)
// Without overriding isFatalException, JsonRpc serializes exceptions and sends them to the client.
// This is particularly bad for notifications such as textDocument/didChange which don't require a response,
// and thus any exception that happens during e.g. text sync gets swallowed.
use jsonRpc =
{ new JsonRpc(jsonRpcHandler) with
member this.IsFatalException(ex: Exception) =
match ex with
| :? LocalRpcException -> false
| _ -> true }
use jsonRpc = customizeRpc jsonRpcHandler

/// When the server wants to send a notification to the client
let sendServerNotification (rpcMethod: string) (notificationObj: obj) : AsyncLspResult<unit> =
Expand Down