arturobernalg commented on code in PR #620:
URL:
https://github.com/apache/httpcomponents-core/pull/620#discussion_r2813534421
##########
httpcore5-h2/src/main/java/org/apache/hc/core5/http2/protocol/H2RequestConformance.java:
##########
@@ -75,20 +76,37 @@ public H2RequestConformance() {
public void process(final HttpRequest request, final EntityDetails entity,
final HttpContext localContext)
throws HttpException, IOException {
Args.notNull(request, "HTTP request");
+
+ boolean validateTe = false;
for (int i = 0; i < illegalHeaderNames.length; i++) {
final String headerName = illegalHeaderNames[i];
- final Header header = request.getFirstHeader(headerName);
- if (header != null) {
- if (headerName.equalsIgnoreCase(HttpHeaders.TE)) {
- final String value = header.getValue();
- if (!"trailers".equalsIgnoreCase(value)) {
- throw new ProtocolException("Header '%s: %s' is
illegal for HTTP/2 messages", HttpHeaders.TE, value);
- }
- } else {
- throw new ProtocolException("Header '%s' is illegal for
HTTP/2 messages", headerName);
- }
+ if (HttpHeaders.TE.equalsIgnoreCase(headerName)) {
+ validateTe = true;
+ continue;
+ }
+ if (request.getFirstHeader(headerName) != null) {
+ throw new ProtocolException("Header '%s' is illegal for HTTP/2
messages", headerName);
}
}
+
+ if (validateTe) {
+ validateTE(request);
+ }
+ }
+
+ private static void validateTE(final HttpRequest request) throws
ProtocolException {
+ boolean sawAnyToken = false;
+ for (final Iterator<String> it = MessageSupport.iterateTokens(request,
HttpHeaders.TE); it.hasNext(); ) {
+ final String token = it.next();
+ sawAnyToken = true;
+ if (!"trailers".equalsIgnoreCase(token)) {
+ throw new ProtocolException(
+ "Header '%s: %s' is illegal for HTTP/2 messages",
HttpHeaders.TE, token);
+ }
+ }
+ if (!sawAnyToken && request.getFirstHeader(HttpHeaders.TE) != null) {
Review Comment:
You need some equivalent of sawAnyToken if you want to reject these cases:
- TE:
- TE:
- TE: , , (only separators / whitespace)
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