@aws/pdk
Version:
All documentation is located at: https://aws.github.io/aws-pdk
144 lines • 21 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.extractWebSocketSchemas = exports.extractWebSocketSchema = void 0;
const constants_1 = require("./constants");
const prepare_spec_1 = require("./prepare-spec");
const _get = (object, paths) => {
if (typeof object === "undefined") {
return undefined;
}
if (paths.length === 0) {
return object;
}
return _get(object[paths[0]], paths.slice(1));
};
/**
* Return whether or not the given OpenAPI object is a reference
*/
const isRef = (obj) => !!obj && typeof obj === "object" && "$ref" in obj;
/**
* Return whether a given OpenAPI object is a schema object
*/
const isSchemaObj = (obj) => !!obj &&
typeof obj === "object" &&
("type" in obj ||
"allOf" in obj ||
"oneOf" in obj ||
"anyOf" in obj ||
"not" in obj);
/**
* Split a reference into its component parts
* eg: #/components/schemas/Foo -> ["components", "schemas", "Foo"]
*/
const splitRef = (ref) => ref
.slice(2)
.split("/")
.map((p) => p.replace(/~0/g, "~").replace(/~1/g, "/"));
/**
* Resolve the given reference in the spec
*/
const resolveRef = (spec, ref) => {
const refParts = splitRef(ref);
const resolved = _get(spec, refParts);
if (!resolved) {
throw new Error(`Unable to resolve ref ${ref} in spec`);
}
return resolved;
};
/**
* Get the id of a reference to be used in the "definitions" section
*/
const getRefId = (ref) => splitRef(ref).join("_");
/**
* Rewrite a reference to an API gateway model supported format
* eg #/components/schemas/Foo -> #/definitions/components_schemas_Foo
*/
const rewriteRef = (ref) => `#/definitions/${getRefId(ref)}`;
/**
* Map the given function over all refs in an OpenAPI object
*/
const mapRefs = (obj, fn) => {
// Use JSON.stringify's replacement function to simplify traversing a spec
return JSON.parse(JSON.stringify(obj, (key, value) => {
if (key === "$ref") {
return fn(value);
}
return value;
}));
};
/**
* Find all references recursively starting at the given schema
*/
const findAllReferences = (schema, spec, seenRefs = new Set()) => {
const newRefs = new Set();
mapRefs(schema, (ref) => newRefs.add(ref));
const refsToSearch = [...newRefs].filter((ref) => !seenRefs.has(ref));
const newSeenRefs = new Set([...newRefs, ...seenRefs]);
return new Set([
...newSeenRefs,
...refsToSearch.flatMap((ref) => [
...findAllReferences(resolveRef(spec, ref), spec, newSeenRefs),
]),
]);
};
/**
* Rewrite all references in the schema to instead reference #/definitions/xxx, and collect any other schemas recursively referenced by the schema
*
* @see https://docs.aws.amazon.com/apigateway/latest/developerguide/models-mappings-models.html#api-gateway-request-validation-model-more-complex
*/
const rewriteSchemaReferences = (schema, spec) => {
// Rewrite the schema and spec, replacing references with #/definitions/xxx as per the API Gateway model format
const rewrittenSchema = mapRefs(schema, rewriteRef);
const rewrittenSpec = mapRefs(spec, rewriteRef);
// Set of definitions that must be included for the given schema
const definitions = {};
// Find all recursive references from the schema, and add their (rewritten) schema to definitions
[...findAllReferences(schema, spec)].forEach((ref) => {
definitions[getRefId(ref)] = resolveRef(rewrittenSpec, ref);
});
return { schema: rewrittenSchema, definitions };
};
const extractWebSocketSchema = (operationId, requestBody, spec) => {
// Resolve the body reference, if any
const body = isRef(requestBody)
? resolveRef(spec, requestBody.$ref)
: requestBody;
const candidateSchema = body?.content?.["application/json"]?.schema;
if (!candidateSchema) {
// No schema found
return undefined;
}
// Resolve the top level schema reference, if any
const rawSchema = isRef(candidateSchema)
? resolveRef(spec, candidateSchema.$ref)
: candidateSchema;
if (!isSchemaObj(rawSchema)) {
throw new Error(`Invalid OpenAPI specification: request body for operation ${operationId} is not a valid schema`);
}
// Rewrite schema references to a format accepted by API Gateway
return rewriteSchemaReferences(rawSchema, spec);
};
exports.extractWebSocketSchema = extractWebSocketSchema;
const extractWebSocketSchemas = (operationIds, serverOperationPaths, spec) => {
const schemasByOperationId = {};
for (const operationId of operationIds) {
const path = serverOperationPaths[operationId];
const pathItem = spec.paths[path];
(0, prepare_spec_1.validatePathItem)(path, pathItem);
// Exactly 1 operation must be defined for each path in a websocket OpenAPI spec
const operations = Object.values(constants_1.HttpMethods).flatMap((method) => pathItem[method] ? [{ ...pathItem[method], method }] : []);
if (operations.length !== 1) {
throw new Error(`Each path must have a single method for websocket apis. Found ${operations.map((o) => o.method).join(", ") || "no methods"}`);
}
// Extract the schema for the websocket input validation model
if (operations[0]?.requestBody) {
const schema = (0, exports.extractWebSocketSchema)(operationId, operations[0].requestBody, spec);
if (schema) {
schemasByOperationId[operationId] = schema;
}
}
}
return schemasByOperationId;
};
exports.extractWebSocketSchemas = extractWebSocketSchemas;
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Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.\nSPDX-License-Identifier: Apache-2.0 */\nimport type { OpenAPIV3 } from \"openapi-types\";\nimport { HttpMethods } from \"./constants\";\nimport { validatePathItem } from \"./prepare-spec\";\n\ntype SchemaDefinitions = { [key: string]: OpenAPIV3.SchemaObject };\nexport type ApiGatewaySchemaWithRefs = {\n  schema: OpenAPIV3.SchemaObject;\n  definitions: SchemaDefinitions;\n};\n\nconst _get = (object: any | undefined, paths: string[]): any => {\n  if (typeof object === \"undefined\") {\n    return undefined;\n  }\n  if (paths.length === 0) {\n    return object;\n  }\n  return _get(object[paths[0]], paths.slice(1));\n};\n\n/**\n * Return whether or not the given OpenAPI object is a reference\n */\nconst isRef = (obj: unknown): obj is OpenAPIV3.ReferenceObject =>\n  !!obj && typeof obj === \"object\" && \"$ref\" in obj;\n\n/**\n * Return whether a given OpenAPI object is a schema object\n */\nconst isSchemaObj = (obj: unknown): obj is OpenAPIV3.SchemaObject =>\n  !!obj &&\n  typeof obj === \"object\" &&\n  (\"type\" in obj ||\n    \"allOf\" in obj ||\n    \"oneOf\" in obj ||\n    \"anyOf\" in obj ||\n    \"not\" in obj);\n\n/**\n * Split a reference into its component parts\n * eg: #/components/schemas/Foo -> [\"components\", \"schemas\", \"Foo\"]\n */\nconst splitRef = (ref: string): string[] =>\n  ref\n    .slice(2)\n    .split(\"/\")\n    .map((p) => p.replace(/~0/g, \"~\").replace(/~1/g, \"/\"));\n\n/**\n * Resolve the given reference in the spec\n */\nconst resolveRef = (spec: OpenAPIV3.Document, ref: string): any => {\n  const refParts = splitRef(ref);\n  const resolved = _get(spec, refParts);\n  if (!resolved) {\n    throw new Error(`Unable to resolve ref ${ref} in spec`);\n  }\n  return resolved;\n};\n\n/**\n * Get the id of a reference to be used in the \"definitions\" section\n */\nconst getRefId = (ref: string) => splitRef(ref).join(\"_\");\n\n/**\n * Rewrite a reference to an API gateway model supported format\n * eg #/components/schemas/Foo -> #/definitions/components_schemas_Foo\n */\nconst rewriteRef = (ref: string) => `#/definitions/${getRefId(ref)}`;\n\n/**\n * Map the given function over all refs in an OpenAPI object\n */\nconst mapRefs = <T>(obj: object, fn: (ref: string) => T): object => {\n  // Use JSON.stringify's replacement function to simplify traversing a spec\n  return JSON.parse(\n    JSON.stringify(obj, (key, value) => {\n      if (key === \"$ref\") {\n        return fn(value);\n      }\n      return value;\n    })\n  );\n};\n\n/**\n * Find all references recursively starting at the given schema\n */\nconst findAllReferences = (\n  schema: OpenAPIV3.SchemaObject,\n  spec: OpenAPIV3.Document,\n  seenRefs: Set<string> = new Set()\n): Set<string> => {\n  const newRefs = new Set<string>();\n  mapRefs(schema, (ref) => newRefs.add(ref));\n  const refsToSearch = [...newRefs].filter((ref) => !seenRefs.has(ref));\n  const newSeenRefs = new Set([...newRefs, ...seenRefs]);\n  return new Set([\n    ...newSeenRefs,\n    ...refsToSearch.flatMap((ref) => [\n      ...findAllReferences(resolveRef(spec, ref), spec, newSeenRefs),\n    ]),\n  ]);\n};\n\n/**\n * Rewrite all references in the schema to instead reference #/definitions/xxx, and collect any other schemas recursively referenced by the schema\n *\n * @see https://docs.aws.amazon.com/apigateway/latest/developerguide/models-mappings-models.html#api-gateway-request-validation-model-more-complex\n */\nconst rewriteSchemaReferences = (\n  schema: OpenAPIV3.SchemaObject,\n  spec: OpenAPIV3.Document\n): ApiGatewaySchemaWithRefs => {\n  // Rewrite the schema and spec, replacing references with #/definitions/xxx as per the API Gateway model format\n  const rewrittenSchema = mapRefs(schema, rewriteRef) as OpenAPIV3.SchemaObject;\n  const rewrittenSpec = mapRefs(spec, rewriteRef) as OpenAPIV3.Document;\n\n  // Set of definitions that must be included for the given schema\n  const definitions: SchemaDefinitions = {};\n\n  // Find all recursive references from the schema, and add their (rewritten) schema to definitions\n  [...findAllReferences(schema, spec)].forEach((ref) => {\n    definitions[getRefId(ref)] = resolveRef(rewrittenSpec, ref);\n  });\n\n  return { schema: rewrittenSchema, definitions };\n};\n\nexport const extractWebSocketSchema = (\n  operationId: string,\n  requestBody: OpenAPIV3.RequestBodyObject | OpenAPIV3.ReferenceObject,\n  spec: OpenAPIV3.Document\n): ApiGatewaySchemaWithRefs | undefined => {\n  // Resolve the body reference, if any\n  const body = isRef(requestBody)\n    ? (resolveRef(spec, requestBody.$ref) as OpenAPIV3.RequestBodyObject)\n    : requestBody;\n  const candidateSchema = body?.content?.[\"application/json\"]?.schema;\n  if (!candidateSchema) {\n    // No schema found\n    return undefined;\n  }\n\n  // Resolve the top level schema reference, if any\n  const rawSchema = isRef(candidateSchema)\n    ? (resolveRef(spec, candidateSchema.$ref) as OpenAPIV3.SchemaObject)\n    : candidateSchema;\n\n  if (!isSchemaObj(rawSchema)) {\n    throw new Error(\n      `Invalid OpenAPI specification: request body for operation ${operationId} is not a valid schema`\n    );\n  }\n\n  // Rewrite schema references to a format accepted by API Gateway\n  return rewriteSchemaReferences(rawSchema, spec);\n};\n\nexport const extractWebSocketSchemas = (\n  operationIds: string[],\n  serverOperationPaths: { [operationId: string]: string },\n  spec: OpenAPIV3.Document\n): { [operationId: string]: ApiGatewaySchemaWithRefs } => {\n  const schemasByOperationId: {\n    [operationId: string]: ApiGatewaySchemaWithRefs;\n  } = {};\n  for (const operationId of operationIds) {\n    const path = serverOperationPaths[operationId];\n    const pathItem = spec.paths[path]!;\n    validatePathItem(path, pathItem);\n\n    // Exactly 1 operation must be defined for each path in a websocket OpenAPI spec\n    const operations = Object.values(HttpMethods).flatMap((method) =>\n      pathItem[method] ? [{ ...pathItem[method], method }] : []\n    );\n\n    if (operations.length !== 1) {\n      throw new Error(\n        `Each path must have a single method for websocket apis. Found ${\n          operations.map((o) => o.method).join(\", \") || \"no methods\"\n        }`\n      );\n    }\n\n    // Extract the schema for the websocket input validation model\n    if (operations[0]?.requestBody) {\n      const schema = extractWebSocketSchema(\n        operationId,\n        operations[0].requestBody,\n        spec\n      );\n      if (schema) {\n        schemasByOperationId[operationId] = schema;\n      }\n    }\n  }\n  return schemasByOperationId;\n};\n"]}