@Test
public void testCommaSeparatedHeaderValues() {
DefaultHttpMessage message;
List<String> commaSeparatedHeaders;
// test the empty headers case
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, empty());
// two headers present, but no values
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "");
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, empty());
// a single header value
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "chunked");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, contains("chunked"));
// a single header value with extra spaces
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, " chunked , ");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, contains("chunked"));
// two comma-separated values in one header line
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "compress, gzip");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, contains("compress", "gzip"));
// two comma-separated values in one header line with a spurious ',' and space. see RFC 7230
// section 7
// for information on empty list items (not all of which are valid header-values).
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "compress, gzip, ,");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, contains("compress", "gzip"));
// two values in two separate header lines
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "gzip");
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "chunked");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, contains("gzip", "chunked"));
// multiple comma-separated values in two separate header lines
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "gzip, compress");
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "deflate, gzip");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(commaSeparatedHeaders, contains("gzip", "compress", "deflate", "gzip"));
// multiple comma-separated values in multiple header lines with spurious spaces, commas,
// and tabs (horizontal tabs are defined as optional whitespace in RFC 7230 section 3.2.3)
message = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, " gzip,compress,");
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, "\tdeflate\t, gzip, ");
message.headers().add(HttpHeaders.Names.TRANSFER_ENCODING, ",gzip,,deflate,\t, ,");
commaSeparatedHeaders =
ProxyUtils.getAllCommaSeparatedHeaderValues(HttpHeaders.Names.TRANSFER_ENCODING, message);
assertThat(
commaSeparatedHeaders, contains("gzip", "compress", "deflate", "gzip", "gzip", "deflate"));
}
