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#ifndef QUICHE_HTTP2_ADAPTER_HEADER_VALIDATOR_H_
#define QUICHE_HTTP2_ADAPTER_HEADER_VALIDATOR_H_
#include <string>
#include <vector>
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "common/platform/api/quiche_export.h"
namespace http2 {
namespace adapter {
enum class HeaderType : uint8_t {
REQUEST,
REQUEST_TRAILER,
RESPONSE_100,
RESPONSE,
RESPONSE_TRAILER,
};
class QUICHE_EXPORT_PRIVATE HeaderValidator {
public:
HeaderValidator() {}
void SetMaxFieldSize(uint32_t field_size) { max_field_size_ = field_size; }
// If called, this validator will allow the `:protocol` pseudo-header, as
// described in RFC 8441.
void AllowConnect() { allow_connect_ = true; }
void StartHeaderBlock();
enum HeaderStatus {
HEADER_OK,
HEADER_FIELD_INVALID,
HEADER_FIELD_TOO_LONG,
};
HeaderStatus ValidateSingleHeader(absl::string_view key,
absl::string_view value);
// Returns true if all required pseudoheaders and no extra pseudoheaders are
// present for the given header type.
bool FinishHeaderBlock(HeaderType type);
// For responses, returns the value of the ":status" header, if present.
absl::string_view status_header() const { return status_; }
absl::optional<size_t> content_length() const { return content_length_; }
private:
bool HandleContentLength(absl::string_view value);
std::vector<std::string> pseudo_headers_;
std::string status_;
std::string method_;
std::string path_;
absl::optional<size_t> max_field_size_;
absl::optional<size_t> content_length_;
bool allow_connect_ = false;
};
} // namespace adapter
} // namespace http2
#endif // QUICHE_HTTP2_ADAPTER_HEADER_VALIDATOR_H_