omcp 0.1.1

Utility functions
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148

use async_trait::async_trait;
use clap::{Parser, Subcommand};
use log::{
    LevelFilter, {error, info},
};
use omcp::{
    client::{
        builder::OMcpClientBuilder,
        io::{EventHandlerTrait, OMcpClient},
        types::OMcpServerType,
    },
    error::{Error, Result},
    json_rpc::JsonRPCMessageBuilder,
};

use omcp::json_rpc::JsonRPCMessage;

use rstaples::{logging::StaplesLogger, staples::printkv};

#[derive(Parser)]
struct UserArgsDump {
    /// Server
    #[arg(short, long)]
    server: String,

    /// Bearer Token
    #[arg(short, long)]
    bearer: Option<String>,

    /// Verbose
    #[arg(short, long)]
    verbose: bool,

    /// Debug
    #[arg(short, long)]
    debug: bool,
}

#[derive(Subcommand)]
enum Commands {
    /// Dumps the supported tools JSON
    DumpTools(UserArgsDump),
    Call,
}

#[derive(Parser)]
#[command(version, about, long_about = None)]
struct UserArgs {
    #[command(subcommand)]
    command: Commands,
}

struct DumpHandler {}

async fn send_tool_list_req(client: &OMcpClient) -> Result<()> {
    let msg = JsonRPCMessageBuilder::new().with_id(2).with_method("tools/list").build();
    client.send(&msg).await
}

#[async_trait]
impl EventHandlerTrait for DumpHandler {
    async fn event_handler(&self, msg: &JsonRPCMessage) -> Result<()> {
        let msg_string = serde_json::to_string_pretty(msg)?;
        println!("{msg_string}");
        // we're done
        Err(Error::Eof)
    }
}

fn init_logger(verbose: bool, debug: bool) -> Result<()> {
    let log = StaplesLogger::new();

    let log = match debug {
        true => log.with_log_level(LevelFilter::Debug),
        false => log,
    };

    let log = match verbose {
        true => log.with_stdout(),
        false => log,
    };

    log.start()?;

    Ok(())
}

async fn main_dump_tool(args: &UserArgsDump) -> Result<()> {
    init_logger(args.verbose, args.debug)?;

    if args.verbose {
        println!("MCP Dumper");
        printkv("Server", &args.server);
        printkv("Verbose", args.verbose);
        printkv("Debug", args.debug);

        if let Some(b) = &args.bearer {
            // only display a little bit of the token to stdout
            if let Some(first_five) = b.get(0..5) {
                let first_five = format!("{}...", first_five);
                printkv("Bearer", first_five)
            }
        }
    }

    let builder = OMcpClientBuilder::new(&args.server, OMcpServerType::Sse);

    let builder = match &args.bearer {
        Some(v) => builder.with_bearer(v)?,
        None => builder,
    };

    let mut client = builder.build();

    client.connect().await?;

    info!("connected to {}", args.server);

    let dh = DumpHandler {};
    send_tool_list_req(&client).await?;

    let ret = client.event_loop(dh).await;

    let ret = match ret {
        Ok(_) => Ok(()),
        Err(Error::Eof) => Ok(()),
        Err(e) => {
            error!("{e}");
            Err(e)
        }
    };

    // don't really care about this failing but we want
    // return whatever the event loop returned
    let _ = client.disconnect().await;

    ret
}

#[tokio::main]
async fn main() -> Result<()> {
    let args = UserArgs::parse();

    match args.command {
        Commands::DumpTools(d) => main_dump_tool(&d).await,
        Commands::Call => Err(Error::NotImplemented),
    }
}