public String readHeaders()

in commons-fileupload2-core/src/main/java/org/apache/commons/fileupload2/core/MultipartInput.java [868:901]

30 lines of code
7 McCabe index (conditional complexity)


    public String readHeaders() throws FileUploadSizeException, MalformedStreamException {
        var i = 0;
        byte b;
        // to support multi-byte characters
        final var baos = new ByteArrayOutputStream();
        var size = 0;
        while (i < HEADER_SEPARATOR.length) {
            try {
                b = readByte();
            } catch (final FileUploadSizeException e) {
                // wraps a FileUploadSizeException, re-throw as it will be unwrapped later
                throw e;
            } catch (final IOException e) {
                throw new MalformedStreamException("Stream ended unexpectedly", e);
            }
            if (++size > HEADER_PART_SIZE_MAX) {
                throw new MalformedStreamException(
                        String.format("Header section has more than %s bytes (maybe it is not properly terminated)", HEADER_PART_SIZE_MAX));
            }
            if (b == HEADER_SEPARATOR[i]) {
                i++;
            } else {
                i = 0;
            }
            baos.write(b);
        }

        try {
            return baos.toString(Charsets.toCharset(headerCharset, Charset.defaultCharset()).name());
        } catch (final UnsupportedEncodingException e) {
            // not possible
            throw new IllegalStateException(e);
        }
    }