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fix(mcp-apps-server): put CSP meta on resource read response #140

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fix(mcp-apps-server): put CSP meta on resource read response #140

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36 changes: 20 additions & 16 deletions model-context-protocol/mcp-apps-server/src/main/java/com/example/mcpappsserver/DiceApp.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
package com.example.mcpappsserver;

import io.modelcontextprotocol.spec.McpSchema.ReadResourceResult;
import io.modelcontextprotocol.spec.McpSchema.TextResourceContents;
import org.springframework.ai.mcp.annotation.McpResource;
import org.springframework.ai.mcp.annotation.McpTool;
import org.springframework.ai.mcp.annotation.context.MetaProvider;
Expand All @@ -21,22 +23,24 @@ public class DiceApp {
@Value("classpath:/app/dice-app.html")
private Resource diceAppResource;

@McpResource(name = "Dice App Resource",
uri = "ui://dice/dice-app.html",
mimeType = "text/html;profile=mcp-app",
metaProvider = CspMetaProvider.class)
public String getDiceAppResource() throws IOException {
return diceAppResource.getContentAsString(Charset.defaultCharset());
}
private static final String DICE_APP_URI = "ui://dice/dice-app.html";

public static final class CspMetaProvider implements MetaProvider {
@Override
public Map<String, Object> getMeta() {
return Map.of("ui",
Map.of("csp",
Map.of("resourceDomains",
List.of("https://unpkg.com"))));
}
private static final String DICE_APP_MIME_TYPE = "text/html;profile=mcp-app";

@McpResource(name = "Dice App Resource",
uri = DICE_APP_URI,
mimeType = DICE_APP_MIME_TYPE)
public ReadResourceResult getDiceAppResource() throws IOException {
String html = diceAppResource.getContentAsString(Charset.defaultCharset());
return ReadResourceResult.builder(List.of(
TextResourceContents.builder(DICE_APP_URI, html)
.mimeType(DICE_APP_MIME_TYPE)
.meta(Map.of("ui",
Map.of("csp",
Map.of("resourceDomains",
List.of("https://unpkg.com")))))
.build()))
.build();
}

//
Expand All @@ -56,7 +60,7 @@ public static final class DiceMetaProvider implements MetaProvider {
public Map<String, Object> getMeta() {
return Map.of("ui",
Map.of(
"resourceUri", "ui://dice/dice-app.html"));
"resourceUri", DICE_APP_URI));
}
}

Expand Down