Leggere una risorsa da un AgentCore gateway

La seguente richiesta curl mostra un esempio di richiesta di lettura di una risorsa con URI config://app-settings attraverso un gateway con l'IDmygateway-abcdefghij.

curl -X POST \
  https://mygateway-abcdefghij.gateway.bedrock-agentcore.us-west-2.amazonaws.com/mcp \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -d '{
    "jsonrpc": "2.0",
    "id": "read-resource-request",
    "method": "resources/read",
    "params": {
      "uri": "config://app-settings"
    }
}'

import requests
import json

def read_resource(gateway_url, access_token, resource_uri):
    headers = {
        "Content-Type": "application/json",
        "Authorization": f"Bearer {access_token}"
    }

    payload = {
        "jsonrpc": "2.0",
        "id": "read-resource-request",
        "method": "resources/read",
        "params": {
            "uri": resource_uri
        }
    }

    response = requests.post(gateway_url, headers=headers, json=payload)
    return response.json()

# Example usage
gateway_url = "https://${GatewayEndpoint}/mcp" # Replace with your actual gateway endpoint
access_token = "${AccessToken}" # Replace with your actual access token
result = read_resource(
    gateway_url,
    access_token,
    "config://app-settings"  # Replace with the resource URI from resources/list
)
print(json.dumps(result, indent=2))

from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client
from pydantic import AnyUrl
import asyncio

async def execute_mcp(
    url,
    token,
    resource_uri,
    headers=None
):
    default_headers = {
        "Authorization": f"Bearer {token}"
    }
    headers = {**default_headers, **(headers or {})}

    async with streamablehttp_client(
       url=url,
       headers=headers,
    ) as (
        read_stream,
        write_stream,
        callA,
    ):
        async with ClientSession(read_stream, write_stream) as session:
            # 1. Perform initialization handshake
            print("Initializing MCP...")
            _init_response = await session.initialize()
            print(f"MCP Server Initialize successful! - {_init_response}")

            # 2. Read specific resource
            print(f"Reading resource: {resource_uri}")
            resource_response = await session.read_resource(uri=AnyUrl(resource_uri))
            for content in resource_response.contents:
                print(f"URI: {content.uri}, MIME: {content.mimeType}")
                if hasattr(content, 'text') and content.text:
                    print(f"Text: {content.text}")
                elif hasattr(content, 'blob') and content.blob:
                    print(f"Blob (base64): {content.blob[:100]}...")
            return resource_response

async def main():
    url = "https://${GatewayEndpoint}/mcp"
    token = "your_bearer_token_here"
    resource_uri = "config://app-settings"
    await execute_mcp(
        url=url,
        token=token,
        resource_uri=resource_uri
    )


if __name__ == "__main__":
    asyncio.run(main())

NOTA: il supporto delle risorse Strands SDK può variare. Utilizzate l'approccio MCP Client di cui sopra per l'implementazione più affidabile. resources/read

from strands.tools.mcp.mcp_client import MCPClient
from mcp.client.streamable_http import streamablehttp_client

def create_streamable_http_transport(mcp_url: str, access_token: str):
    return streamablehttp_client(mcp_url, headers={"Authorization": f"Bearer {access_token}"})

def run_agent(mcp_url: str, access_token: str):
    mcp_client = MCPClient(lambda: create_streamable_http_transport(mcp_url, access_token))

    with mcp_client:
        result = mcp_client.read_resource_sync(uri="config://app-settings")
        print(result)

run_agent(<MCP URL>, <Access token>)

NOTA: il supporto delle risorse dell'adattatore LangGraph MCP può variare. Utilizzate l'approccio MCP Client di cui sopra per l'implementazione più affidabileresources/read.

import asyncio
from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client
from pydantic import AnyUrl

async def read_resource(url, token, resource_uri):
    headers = {"Authorization": f"Bearer {token}"}
    async with streamablehttp_client(url=url, headers=headers) as (
        read_stream, write_stream, callA
    ):
        async with ClientSession(read_stream, write_stream) as session:
            await session.initialize()
            response = await session.read_resource(uri=AnyUrl(resource_uri))
            for content in response.contents:
                if hasattr(content, 'text') and content.text:
                    print(f"{content.uri}: {content.text}")
                elif hasattr(content, 'blob') and content.blob:
                    print(f"{content.uri}: <blob, {len(content.blob)} chars base64>")

asyncio.run(read_resource(
    "https://${GatewayEndpoint}/mcp",
    "${AccessToken}",
    "config://app-settings"
))