JSON schema validation is called for application/octet-stream #1012
Description
As per fasitfy docs schema validation should only be called if body is application/json
Validation will only be attempted if the content type is application-json, as described in the documentation for the content type parser.
My server is configured like this
const server = fastify({
ajv: {customOptions: {coerceTypes: "array"}},
querystringParser: (str) => parseQueryString(str, {comma: true, parseArrays: false}),
});
server.addContentTypeParser(
"application/octet-stream",
{parseAs: "buffer"},
async (_request: FastifyRequest, payload: Buffer) => {
// This is called
console.log(payload) // <Buffer 00 00 00 00 00 00 00 00 00 00 00 00 ... >
return payload;
}
);The schema is really simple
schema: {
body: {type: "array"}
}I can confirm that my content type parser is called correctly but I am still getting a schema validation error
Error: body must be array
at defaultSchemaErrorFormatter (.../node_modules/fastify/lib/context.js:108:10)
at wrapValidationError (.../node_modules/fastify/lib/validation.js:228:17)
at validate (.../node_modules/fastify/lib/validation.js:146:16)
at preValidationCallback (.../node_modules/fastify/lib/handleRequest.js:92:25)
at handler (.../node_modules/fastify/lib/handleRequest.js:76:7)
at .../node_modules/fastify/lib/contentTypeParser.js:192:9
at AsyncResource.runInAsyncScope (node:async_hooks:206:9)
at done (.../node_modules/fastify/lib/contentTypeParser.js:186:14)
at /.../node_modules/fastify/lib/contentTypeParser.js:275:27
at processTicksAndRejections (node:internal/process/task_queues:95:5) {
statusCode: 400,
code: 'FST_ERR_VALIDATION',
validation: [
{
instancePath: '',
schemaPath: '#/type',
keyword: 'type',
params: [Object],
message: 'must be array'
}
],
validationContext: 'body'
}As per docs I would expect that JSON schema validation is skipped for non JSON bodies.
Let me know if I am just misreading what the docs are saying and if anyone has an idea how to work around this any hint would be appreciated.