162 lines · 4 KBtext/plain; charset=utf-8
The Coline App SDK: apps, tools, file types and surfaces that run inside Coline workspaces, and public websites with Coline Sites. TypeScript, with an in-memory test workspace. MIT.
| 4 | import { validateChatCardTree } from "../tree/chat-card"; |
| 5 | import { |
| 6 | ColineProtocolError, |
| 7 | parseSignedProtocolRequest, |
| 8 | } from "./protocol"; |
| 9 | import { |
| 10 | TOOL_INVOKE_KIND, |
| 11 | toolInvokePayloadSchema, |
| 12 | type ToolInvokeResponse, |
| 13 | } from "./tool-invoke"; |
| 14 |
| 15 | /** |
| 16 | * The external app server handler (plan §10.3): mount at the route Coline |
| 17 | * delivers tool invocations to (conventionally `POST {baseUrl}/coline/tools`). |
| 18 | * |
| 19 | * ```ts |
| 20 | * // app/coline/tools/route.ts (Next.js) — or any fetch-shaped server |
| 21 | * import app from "../../../app.config"; |
| 22 | * import { createColineToolHandler } from "@colineapp/sdk/v2"; |
| 23 | * |
| 24 | * export const POST = createColineToolHandler({ |
| 25 | * app, |
| 26 | * secret: process.env.COLINE_DELIVERY_SECRET!, |
| 27 | * }); |
| 28 | * ``` |
| 29 | * |
| 30 | * The handler verifies the protocol-2 signature, dispatches to the tool's |
| 31 | * `execute` with a `coline` capability client bound to this invocation, and |
| 32 | * returns the wire-shaped result. Effect ceilings are enforced by Coline's |
| 33 | * capability endpoint — a lying tool fails at the capability call, not here. |
| 34 | */ |
| 35 |
| 36 | function json(body: ToolInvokeResponse, status: number): Response { |
| 37 | return new Response(JSON.stringify(body), { |
| 38 | status, |
| 39 | headers: { "content-type": "application/json" }, |
| 40 | }); |
| 41 | } |
| 42 |
| 43 | export function createColineToolHandler(params: { |
| 44 | app: ColineAppV2; |
| 45 | secret: string; |
| 46 | }): (request: Request) => Promise<Response> { |
| 47 | return async (request) => { |
| 48 | let envelope; |
| 49 | let payload; |
| 50 | try { |
| 51 | const parsed = await parseSignedProtocolRequest({ |
| 52 | request, |
| 53 | secret: params.secret, |
| 54 | payloadSchema: toolInvokePayloadSchema, |
| 55 | }); |
| 56 | envelope = parsed.envelope; |
| 57 | payload = parsed.payload; |
| 58 | } catch (error) { |
| 59 | if (error instanceof ColineProtocolError) { |
| 60 | return json({ error: { code: error.code, message: error.message } }, 401); |
| 61 | } |
| 62 | throw error; |
| 63 | } |
| 64 |
| 65 | if (envelope.kind !== TOOL_INVOKE_KIND) { |
| 66 | return json( |
| 67 | { |
| 68 | error: { |
| 69 | code: "unsupported_kind", |
| 70 | message: `This endpoint handles "${TOOL_INVOKE_KIND}" requests; received "${envelope.kind}".`, |
| 71 | }, |
| 72 | }, |
| 73 | 400, |
| 74 | ); |
| 75 | } |
| 76 |
| 77 | const tool = params.app.runtime.tools.get(payload.tool); |
| 78 | if (!tool) { |
| 79 | return json( |
| 80 | { |
| 81 | error: { |
| 82 | code: "unknown_tool", |
| 83 | message: `App "${params.app.manifest.key}" does not define a tool named "${payload.tool}".`, |
| 84 | }, |
| 85 | }, |
| 86 | 404, |
| 87 | ); |
| 88 | } |
| 89 |
| 90 | const input = tool.input.safeParse(payload.input); |
| 91 | if (!input.success) { |
| 92 | return json( |
| 93 | { |
| 94 | error: { |
| 95 | code: "invalid_input", |
| 96 | message: `Tool input is invalid: ${input.error.issues |
| 97 | .map((issue) => `${issue.path.join(".") || "(root)"}: ${issue.message}`) |
| 98 | .join("; ")}`, |
| 99 | }, |
| 100 | }, |
| 101 | 400, |
| 102 | ); |
| 103 | } |
| 104 |
| 105 | const actor: ColineActorRef = |
| 106 | envelope.actor.kind === "user" |
| 107 | ? { kind: "user", userId: envelope.actor.userId } |
| 108 | : { kind: "app" }; |
| 109 |
| 110 | const context: ColineToolContext = { |
| 111 | coline: createHttpCapabilities(payload.capabilities), |
| 112 | workspace: { |
| 113 | workspaceId: envelope.workspace.workspaceId, |
| 114 | workspaceSlug: envelope.workspace.workspaceSlug, |
| 115 | workspaceName: envelope.workspace.workspaceSlug, |
| 116 | }, |
| 117 | actor, |
| 118 | app: { |
| 119 | appKey: envelope.app.appKey, |
| 120 | installId: envelope.app.installId, |
| 121 | }, |
| 122 | }; |
| 123 |
| 124 | try { |
| 125 | const result = await tool.execute(input.data as never, context); |
| 126 | if (result.card) { |
| 127 | const validation = validateChatCardTree(result.card); |
| 128 | if (!validation.ok) { |
| 129 | return json( |
| 130 | { |
| 131 | error: { |
| 132 | code: "invalid_card", |
| 133 | message: `Tool result card rejected: ${validation.reason}`, |
| 134 | }, |
| 135 | }, |
| 136 | 400, |
| 137 | ); |
| 138 | } |
| 139 | } |
| 140 | return json( |
| 141 | { |
| 142 | result: { |
| 143 | ...(result.output !== undefined ? { output: result.output } : {}), |
| 144 | ...(result.card ? { card: result.card } : {}), |
| 145 | }, |
| 146 | }, |
| 147 | 200, |
| 148 | ); |
| 149 | } catch (error) { |
| 150 | return json( |
| 151 | { |
| 152 | error: { |
| 153 | code: "tool_execution_failed", |
| 154 | message: error instanceof Error ? error.message : String(error), |
| 155 | }, |
| 156 | }, |
| 157 | 500, |
| 158 | ); |
| 159 | } |
| 160 | }; |
| 161 | } |
| 162 |