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// mcp-server/src/resource_extensions.rs
use anyhow::{anyhow, Result};
use serde_json::json;
use mcp_protocol::{
constants::error_codes,
messages::JsonRpcMessage,
types::resource::{ResourceTemplatesListParams, ResourceUnsubscribeParams},
};
use crate::server::Server;
impl Server {
/// Handle resources/templates/list request
pub(crate) async fn handle_resources_templates_list(&self, message: JsonRpcMessage) -> Result<()> {
match message {
JsonRpcMessage::Request { id, params, .. } => {
// Check if server is ready
if self.state().load(std::sync::atomic::Ordering::SeqCst) != mcp_protocol::types::ServerState::Ready as u8 {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::SERVER_NOT_INITIALIZED,
"Server not initialized",
None,
))
.await?;
return Ok(());
}
// Parse parameters (optional)
let params: Option<ResourceTemplatesListParams> = match params {
Some(params) => match serde_json::from_value(params) {
Ok(params) => Some(params),
Err(err) => {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INVALID_PARAMS,
&format!("Invalid template list parameters: {}", err),
None,
))
.await?;
return Ok(());
}
},
None => None,
};
// Get cursor from parameters
let cursor = params.and_then(|p| p.cursor);
// Get templates from manager with pagination
let (templates, next_cursor) = self.resource_manager().list_templates(cursor).await;
// Send response
self.transport()
.send(JsonRpcMessage::response(
id,
json!({
"resourceTemplates": templates,
"nextCursor": next_cursor.unwrap_or_default()
}),
))
.await?;
Ok(())
}
_ => Err(anyhow!("Expected request message for resources/templates/list")),
}
}
/// Handle resources/unsubscribe request
pub(crate) async fn handle_resources_unsubscribe(&self, message: JsonRpcMessage) -> Result<()> {
match message {
JsonRpcMessage::Request { id, params, .. } => {
// Check if server is ready
if self.state().load(std::sync::atomic::Ordering::SeqCst) != mcp_protocol::types::ServerState::Ready as u8 {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::SERVER_NOT_INITIALIZED,
"Server not initialized",
None,
))
.await?;
return Ok(());
}
// Parse parameters
let params: ResourceUnsubscribeParams = match params {
Some(params) => match serde_json::from_value(params) {
Ok(params) => params,
Err(err) => {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INVALID_PARAMS,
&format!("Invalid resource unsubscribe parameters: {}", err),
None,
))
.await?;
return Ok(());
}
},
None => {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INVALID_PARAMS,
"Missing resource unsubscribe parameters",
None,
))
.await?;
return Ok(());
}
};
// Unsubscribe from resource
let client_id = id.to_string(); // Use request ID as client ID for simplicity
match self.resource_manager().unsubscribe(&client_id, ¶ms.uri).await {
Ok(_) => {
// Send success response
self.transport()
.send(JsonRpcMessage::response(
id,
json!({
"success": true
}),
))
.await?;
}
Err(err) => {
// Send error response - but this is not critical, so use internal error
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INTERNAL_ERROR,
&format!("Resource unsubscribe error: {}", err),
None,
))
.await?;
}
}
Ok(())
}
_ => Err(anyhow!("Expected request message for resources/unsubscribe")),
}
}
}