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[Server] Fix: standardize error handling across handlers with MCP specificatio… (#124)

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* fix: standardize error handling across handlers with MCP specification compliance

* Update mcp-elements.md

Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>

* docs: clarify error handling behavior for all element types

* docs: remove unnecessary whitespace in mcp-elements.md

* fix: simplify exception signatures to accept simple messages

* refactor: use specific exceptions in examples for better error handling

* feat: throw exceptions from reference provider instead of returning null

---------

Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>
This commit is contained in:
Kyrian Obikwelu 2025-10-30 17:30:58 +01:00 • committed by GitHub
commit ca18caf29d
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1 changed files with 278 additions and 185 deletions
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3
examples/http-client-communication/server.php
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@ -14,6 +14,7 @@ chdir(__DIR__);
use Http\Discovery\Psr17Factory;
use Laminas\HttpHandlerRunner\Emitter\SapiEmitter;
use Mcp\Exception\ToolCallException;
use Mcp\Schema\Content\TextContent;
use Mcp\Schema\Enum\LoggingLevel;
use Mcp\Schema\JsonRpc\Error as JsonRpcError;
@ -64,7 +65,7 @@ $server = Server::builder()
);
if ($response instanceof JsonRpcError) {
throw new RuntimeException(sprintf('Sampling request failed (%d): %s', $response->code, $response->message));
throw new ToolCallException(sprintf('Sampling request failed (%d): %s', $response->code, $response->message));
}
$result = $response->result;