usebruno/bruno · error · Error

WSDL content must be a string

Error message

WSDL content must be a string

What it means

Thrown by wsdlToBruno when the wsdlContent argument is not of type string. The parser pipeline (parseXML, WSDLParser) operates on a string, so passing a Buffer, an object, null, or undefined is rejected up front. This is a pure input-type guard at the public API boundary.

Source

Thrown at packages/bruno-converters/src/wsdl/wsdl-to-bruno.js:1113

    // Add all operations directly to the service folder
    serviceFolder.items = allOperations;

    if (serviceFolder.items.length > 0) {
      collection.items.push(serviceFolder);
    }
  }

  return collection;
};

/**
 * Convert WSDL content to Bruno collection
 */
export const wsdlToBruno = async (wsdlContent) => {
  try {
    if (typeof wsdlContent !== 'string') {
      throw new Error('WSDL content must be a string');
    }

    // Parse WSDL using enhanced parser
    const parser = new WSDLParser();
    const wsdlData = await parser.parse(wsdlContent);

    const collection = parseWSDLCollection(wsdlData);
    const transformedCollection = transformItemsInCollection(collection);
    const hydratedCollection = hydrateSeqInCollection(transformedCollection);
    const validatedCollection = validateSchema(hydratedCollection);

    return validatedCollection;
  } catch (err) {
    console.error(err);
    throw new Error('Import WSDL collection failed: ' + err.message);
  }
};

View on GitHub (pinned to 9bdd81c7bd)

Solutions

1. Read the file with an encoding: `fs.readFileSync(path, 'utf8')` or `fs.promises.readFile(path, 'utf8')`.
2. If you have a Buffer, convert: `wsdlToBruno(buffer.toString('utf8'))`.
3. Ensure you pass the raw XML text, not a pre-parsed object.

Example fix

// before
const buf = fs.readFileSync('service.wsdl');
await wsdlToBruno(buf); // Buffer, not string

// after
const text = fs.readFileSync('service.wsdl', 'utf8');
await wsdlToBruno(text);

if (typeof wsdlContent !== 'string') {
  wsdlContent = Buffer.isBuffer(wsdlContent) ? wsdlContent.toString('utf8') : String(wsdlContent);
}

const isStringContent = (c) => typeof c === 'string';

When it happens

Trigger: Calling wsdlToBruno(buffer) where buffer is a Node Buffer from fs.readFile (without encoding); passing the parsed object from xml2js directly; passing null/undefined; passing a number.

Common situations: Reading a .wsdl file with fs.readFile (no encoding) and passing the Buffer; forgetting to await fs.promises.readFile(path, 'utf8'); double-parsing the XML before calling.

Related errors

• The Collection has an invalid schema: ${err.message}
• No definitions found in WSDL
• Import WSDL collection failed: ${err.message}
• Unknown error
• Invalid URL format: ${url}

AI-assisted analysis of usebruno/bruno@9bdd81c7bd (2026-08-13). Data as JSON: /api/errors/ff1307e9efaf6d98. Report an issue: GitHub.