arthurscchan commented on code in PR #13826:
URL: https://github.com/apache/trafficserver/pull/13826#discussion_r4280544589
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tests/fuzzing/fuzz_header_conversion.cc:
##########
@@ -0,0 +1,152 @@
+#include "proxy/hdrs/HTTP.h"
+#include "proxy/hdrs/HeaderValidator.h"
+#include "proxy/hdrs/VersionConverter.h"
+#include "tscore/Diags.h"
+#include "tsutil/PostScript.h"
+
+#include <fuzzer/FuzzedDataProvider.h>
+
+#include <array>
+#include <cstddef>
+#include <cstdint>
+#include <string>
+#include <string_view>
+#include <vector>
+
+extern int cmd_disable_pfreelist;
+
+namespace
+{
+constexpr size_t MAX_INPUT_LENGTH = 64 * 1024;
+constexpr std::array<std::string_view, 17> FIELD_NAMES = {
+ ":method", ":scheme", ":authority", ":path",
":status", "host",
+ "cookie", "connection", "keep-alive", "proxy-connection",
"upgrade", "transfer-encoding",
+ "te", "content-length", "content-type", "x-test", "",
+};
+
+void
+add_field(HTTPHdr &header, std::string_view name, std::string_view value)
+{
+ MIMEField *field = header.field_create(name);
+
+ field->value_set(header.m_heap, header.m_mime, value);
+ header.field_attach(field);
+}
+
+void
+print_header(const HTTPHdr &header)
+{
+ std::array<char, 32> small_buffer{};
+ int buffer_index = 0;
+ int dump_offset = 0;
+ int length = header.length_get();
+
+ header.print(small_buffer.data(), small_buffer.size(), &buffer_index,
&dump_offset);
+ if (length >= 0 && length <= 2 * static_cast<int>(MAX_INPUT_LENGTH)) {
+ std::vector<char> buffer(static_cast<size_t>(length) + 1);
+ buffer_index = 0;
+ dump_offset = 0;
+ header.print(buffer.data(), static_cast<int>(buffer.size()),
&buffer_index, &dump_offset);
+ }
+}
+
+void
+convert_decoded_header(const HTTPHdr &header, int version, bool is_response,
bool is_trailer)
+{
+ if (!HeaderValidator::is_h2_h3_header_valid(header, is_response, is_trailer)
|| is_trailer) {
+ return;
+ }
+
Review Comment:
I have fixed the comment to better explain it.
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