in commons-fileupload2-core/src/main/java/org/apache/commons/fileupload2/core/AbstractFileUpload.java [400:409]
private void parseHeaderLine(final FileItemHeaders headers, final String header) {
final var colonOffset = header.indexOf(':');
if (colonOffset == -1) {
// This header line is malformed, skip it.
return;
}
final var headerName = header.substring(0, colonOffset).trim();
final var headerValue = header.substring(colonOffset + 1).trim();
headers.addHeader(headerName, headerValue);
}