first commit
This commit is contained in:
@@ -0,0 +1,59 @@
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use crate::core::validation::validate_device_id;
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use rocket::{
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Request,
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http::Status,
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request::{FromRequest, Outcome},
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};
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const AUTHORIZATION_HEADER: &str = "Authorization";
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const DEVICE_ID_HEADER: &str = "X-Device-ID";
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const BEARER_PREFIX: &str = "Bearer ";
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pub struct BearerToken(pub String);
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pub struct DeviceId(pub String);
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pub struct MaybeDeviceId(pub Result<String, String>);
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#[rocket::async_trait]
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impl<'r> FromRequest<'r> for BearerToken {
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type Error = &'static str;
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async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
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let Some(header) = request.headers().get_one(AUTHORIZATION_HEADER) else {
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return Outcome::Error((Status::Unauthorized, "Missing Authorization header"));
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};
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let Some(token) = header.strip_prefix(BEARER_PREFIX) else {
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return Outcome::Error((Status::Unauthorized, "Invalid Authorization header format"));
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};
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Outcome::Success(BearerToken(token.to_owned()))
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}
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}
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#[rocket::async_trait]
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impl<'r> FromRequest<'r> for DeviceId {
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type Error = String;
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async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
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match extract_device_id(request) {
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Ok(device_id) => Outcome::Success(DeviceId(device_id)),
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Err(reason) => Outcome::Error((Status::BadRequest, reason)),
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}
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}
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}
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#[rocket::async_trait]
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impl<'r> FromRequest<'r> for MaybeDeviceId {
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type Error = std::convert::Infallible;
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async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
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Outcome::Success(MaybeDeviceId(extract_device_id(request)))
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}
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}
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fn extract_device_id(request: &Request<'_>) -> Result<String, String> {
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let Some(device_id) = request.headers().get_one(DEVICE_ID_HEADER) else {
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return Err("Missing X-Device-ID header".into());
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};
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validate_device_id(device_id)?;
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Ok(device_id.to_owned())
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}
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@@ -0,0 +1,6 @@
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use rocket::{Request, catch, http::Status, response::content::RawJson};
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#[catch(default)]
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pub fn default_catcher(status: Status, _request: &Request) -> RawJson<String> {
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RawJson(serde_json::json!({ "error": status.reason_lossy() }).to_string())
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}
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+354
@@ -0,0 +1,354 @@
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use crate::{
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AppState,
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api::auth::BearerToken,
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core::db::lookup_api_token,
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transport::execute::{ExecuteRequest, execute_for_token},
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};
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use rocket::{State, http::Status, post, response::content::RawJson, serde::json::Json};
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use serde::{Deserialize, Serialize};
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use serde_json::{Value, json};
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type ApiResponse = (Status, RawJson<String>);
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const JSONRPC_VERSION: &str = "2.0";
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const MCP_PROTOCOL_VERSION: &str = "2024-11-05";
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#[derive(Deserialize)]
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pub struct JsonRpcRequest {
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pub jsonrpc: String,
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pub id: Option<Value>,
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pub method: String,
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#[serde(default)]
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pub params: Option<Value>,
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}
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#[derive(Serialize)]
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struct JsonRpcResponse<T> {
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jsonrpc: &'static str,
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id: Option<Value>,
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result: T,
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}
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#[derive(Serialize)]
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struct JsonRpcErrorResponse {
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jsonrpc: &'static str,
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id: Option<Value>,
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error: JsonRpcError,
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}
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#[derive(Serialize)]
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struct JsonRpcError {
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code: i64,
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message: String,
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}
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#[derive(Serialize)]
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struct InitializeResult {
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#[serde(rename = "protocolVersion")]
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protocol_version: &'static str,
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capabilities: ServerCapabilities,
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#[serde(rename = "serverInfo")]
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server_info: ServerInfo,
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}
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#[derive(Serialize)]
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struct ServerCapabilities {
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tools: ToolsCapability,
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}
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#[derive(Serialize)]
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struct ToolsCapability {
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list_changed: bool,
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}
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#[derive(Serialize)]
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struct ServerInfo {
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name: &'static str,
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version: &'static str,
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}
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#[derive(Serialize)]
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struct ToolsListResult {
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tools: Vec<ToolDefinition>,
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}
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#[derive(Serialize)]
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struct ToolDefinition {
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name: &'static str,
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description: &'static str,
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#[serde(rename = "inputSchema")]
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input_schema: Value,
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}
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#[derive(Deserialize)]
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struct ToolCallParams {
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name: String,
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arguments: Value,
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}
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#[derive(Serialize)]
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struct ToolCallResult {
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content: Vec<TextContent>,
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#[serde(rename = "isError")]
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is_error: bool,
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}
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#[derive(Serialize)]
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struct ConnectedDevicesResult {
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device_ids: Vec<String>,
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}
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enum ToolCall {
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Execute(ExecuteRequest),
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ListDevices,
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}
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#[derive(Serialize)]
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struct TextContent {
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#[serde(rename = "type")]
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kind: &'static str,
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text: String,
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}
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#[post("/mcp", data = "<body>")]
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pub async fn route(
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body: Json<JsonRpcRequest>,
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token: BearerToken,
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state: &State<AppState>,
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) -> ApiResponse {
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let request = body.into_inner();
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if request.jsonrpc != JSONRPC_VERSION {
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return jsonrpc_error(
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Status::BadRequest,
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request.id,
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-32600,
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"Invalid JSON-RPC version",
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);
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}
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match request.method.as_str() {
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"initialize" => jsonrpc_ok(
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request.id,
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InitializeResult {
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protocol_version: MCP_PROTOCOL_VERSION,
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capabilities: ServerCapabilities {
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tools: ToolsCapability {
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list_changed: false,
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},
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},
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server_info: ServerInfo {
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name: "folyo-bridge",
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version: env!("CARGO_PKG_VERSION"),
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},
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},
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),
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"notifications/initialized" => jsonrpc_notification_ok(),
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"tools/list" => jsonrpc_ok(
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request.id,
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ToolsListResult {
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tools: tool_definitions(),
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},
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),
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"tools/call" => handle_tool_call(request.id, request.params, &token.0, state).await,
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_ if request.id.is_none() => jsonrpc_notification_ok(),
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_ => jsonrpc_error(Status::BadRequest, request.id, -32601, "Method not found"),
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}
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}
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async fn handle_tool_call(
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id: Option<Value>,
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params: Option<Value>,
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token: &str,
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state: &State<AppState>,
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) -> ApiResponse {
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let Some(params) = params else {
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return jsonrpc_error(Status::BadRequest, id, -32602, "Missing params");
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};
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let tool_call = match parse_tool_call(params) {
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Ok(call) => call,
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Err(_) => return jsonrpc_error(Status::BadRequest, id, -32602, "Invalid params"),
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};
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match tool_call {
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ToolCall::Execute(request) => execute_tool_call(id, token, state, request).await,
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ToolCall::ListDevices => list_devices_tool_call(id, token, state).await,
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}
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}
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fn tool_definitions() -> Vec<ToolDefinition> {
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vec![
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ToolDefinition {
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name: "execute",
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description: "Execute a shell command on a connected device owned by the authenticated user.",
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input_schema: json!({
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"type": "object",
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"required": ["device_id", "command"],
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"properties": {
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"device_id": {
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"type": "string",
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"description": "Identifier of the connected device."
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},
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"command": {
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"type": "string",
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"description": "Shell command to execute on the target device."
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}
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},
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"additionalProperties": false
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}),
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},
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ToolDefinition {
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name: "list_devices",
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description: "List currently connected device IDs owned by the authenticated user.",
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input_schema: json!({
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"type": "object",
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"properties": {},
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"additionalProperties": false
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}),
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},
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]
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}
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fn parse_tool_call(params: Value) -> Result<ToolCall, &'static str> {
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let call: ToolCallParams = serde_json::from_value(params).map_err(|_| "Invalid params")?;
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match call.name.as_str() {
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"execute" => serde_json::from_value(call.arguments)
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.map(ToolCall::Execute)
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.map_err(|_| "Invalid execute arguments"),
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"list_devices" => parse_list_devices_arguments(call.arguments),
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_ => Err("Unknown tool"),
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}
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}
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fn parse_list_devices_arguments(arguments: Value) -> Result<ToolCall, &'static str> {
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match arguments {
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Value::Object(map) if map.is_empty() => Ok(ToolCall::ListDevices),
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_ => Err("Invalid list_devices arguments"),
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}
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}
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fn connected_device_ids_for_user(state: &State<AppState>, user_id: &str) -> Vec<String> {
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state
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.registry
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.iter()
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.filter_map(|entry| {
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let ((entry_user_id, device_id), _) = entry.pair();
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(entry_user_id == user_id).then(|| device_id.clone())
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})
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.collect()
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}
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async fn execute_tool_call(
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id: Option<Value>,
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token: &str,
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state: &State<AppState>,
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request: ExecuteRequest,
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) -> ApiResponse {
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match execute_for_token(state, token, request).await {
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Ok(result) => json_tool_result(id, &result),
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Err((status, message)) if status == Status::Unauthorized => {
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jsonrpc_error(Status::Unauthorized, id, -32001, message)
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}
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Err((_, message)) => jsonrpc_ok(id, tool_error(message)),
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}
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}
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async fn list_devices_tool_call(
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id: Option<Value>,
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token: &str,
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state: &State<AppState>,
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) -> ApiResponse {
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let user_id = match lookup_api_token(&state.database, token).await {
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Ok(user_id) => user_id,
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Err(message) => return jsonrpc_error(Status::Unauthorized, id, -32001, message),
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};
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let mut device_ids = connected_device_ids_for_user(state, &user_id);
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device_ids.sort();
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json_tool_result(id, &ConnectedDevicesResult { device_ids })
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}
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fn json_tool_result<T: Serialize>(id: Option<Value>, payload: &T) -> ApiResponse {
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match serde_json::to_string(payload) {
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Ok(text) => jsonrpc_ok(id, ToolCallResult::success(text)),
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Err(error) => jsonrpc_error(Status::InternalServerError, id, -32603, error.to_string()),
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}
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}
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fn tool_error(message: String) -> ToolCallResult {
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ToolCallResult::error(message)
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}
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impl ToolCallResult {
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fn success(text: String) -> Self {
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Self {
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content: vec![TextContent::text(text)],
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is_error: false,
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}
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}
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fn error(text: String) -> Self {
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Self {
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content: vec![TextContent::text(text)],
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is_error: true,
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}
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}
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}
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impl TextContent {
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fn text(text: String) -> Self {
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Self { kind: "text", text }
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}
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}
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fn jsonrpc_ok<T: Serialize>(id: Option<Value>, result: T) -> ApiResponse {
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match serde_json::to_string(&JsonRpcResponse {
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jsonrpc: JSONRPC_VERSION,
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id,
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result,
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}) {
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Ok(body) => (Status::Ok, RawJson(body)),
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Err(e) => jsonrpc_error(Status::InternalServerError, None, -32603, e.to_string()),
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}
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}
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fn jsonrpc_notification_ok() -> ApiResponse {
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(Status::Accepted, RawJson(String::new()))
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}
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fn jsonrpc_error(
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status: Status,
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id: Option<Value>,
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code: i64,
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message: impl Into<String>,
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) -> ApiResponse {
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let response = JsonRpcErrorResponse {
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jsonrpc: JSONRPC_VERSION,
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id,
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error: JsonRpcError {
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code,
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message: message.into(),
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},
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};
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match serde_json::to_string(&response) {
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Ok(body) => (status, RawJson(body)),
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Err(e) => (
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Status::InternalServerError,
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RawJson(
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json!({
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"jsonrpc": JSONRPC_VERSION,
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"id": null,
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"error": {
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"code": -32603,
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"message": e.to_string()
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}
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})
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.to_string(),
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),
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),
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}
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}
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Reference in New Issue
Block a user