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LibIMAP: Stop parsing immediately on error

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This makes the parser more resilient to invalid IMAP messages.

Usages of `Optional` have also been removed where the empty case is
equivalent to an empty object.
This commit is contained in:
Tim Ledbetter 2023-10-07 15:53:30 +01:00 • committed by Andrew Kaster
parent 29c477598c
commit 54a28afc13
5 changed files with 333 additions and 314 deletions
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49
Userland/Libraries/LibIMAP/Parser.h
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@ -25,7 +25,9 @@ public:
private:
static MailboxFlag parse_mailbox_flag(StringView);
void consume(StringView);
ErrorOr<ParseStatus> try_parse(ByteBuffer&& buffer, bool expecting_tag);
ErrorOr<void> consume(StringView);
bool consume_if(StringView);
StringView consume_while(Function<bool(u8)> should_consume);
StringView consume_until_end_of_line();
@ -35,39 +37,38 @@ private:
ErrorOr<unsigned> parse_number();
Optional<unsigned> try_parse_number();
void parse_response_done();
void parse_untagged();
void parse_capability_response();
ErrorOr<void> parse_response_done();
ErrorOr<void> parse_untagged();
ErrorOr<void> parse_capability_response();
StringView parse_atom();
StringView parse_quoted_string();
StringView parse_literal_string();
StringView parse_string();
StringView parse_astring();
Optional<StringView> parse_nstring();
ErrorOr<StringView> parse_quoted_string();
ErrorOr<StringView> parse_literal_string();
ErrorOr<StringView> parse_string();
ErrorOr<StringView> parse_astring();
ErrorOr<StringView> parse_nstring();
ResponseStatus parse_status();
ListItem parse_list_item();
FetchCommand::DataItem parse_fetch_data_item();
FetchResponseData parse_fetch_response();
Optional<Vector<Address>> parse_address_list();
Address parse_address();
HashMap<DeprecatedString, DeprecatedString> parse_body_fields_params();
BodyStructure parse_body_structure();
BodyStructure parse_one_part_body();
BodyExtension parse_body_extension();
Tuple<DeprecatedString, HashMap<DeprecatedString, DeprecatedString>> parse_disposition();
Vector<DeprecatedString> parse_langs();
Envelope parse_envelope();
ErrorOr<ResponseStatus> parse_status();
ErrorOr<ListItem> parse_list_item();
ErrorOr<FetchCommand::DataItem> parse_fetch_data_item();
ErrorOr<FetchResponseData> parse_fetch_response();
ErrorOr<Vector<Address>> parse_address_list();
ErrorOr<Address> parse_address();
ErrorOr<HashMap<DeprecatedString, DeprecatedString>> parse_body_fields_params();
ErrorOr<BodyStructure> parse_body_structure();
ErrorOr<BodyStructure> parse_one_part_body();
ErrorOr<BodyExtension> parse_body_extension();
ErrorOr<Tuple<DeprecatedString, HashMap<DeprecatedString, DeprecatedString>>> parse_disposition();
ErrorOr<Vector<DeprecatedString>> parse_langs();
ErrorOr<Envelope> parse_envelope();
template<typename T>
Vector<T> parse_list(T (*converter)(StringView));
ErrorOr<Vector<T>> parse_list(T (*converter)(StringView));
// To retain state if parsing is not finished
ByteBuffer m_buffer;
SolidResponse m_response;
unsigned m_position { 0 };
bool m_incomplete { false };
bool m_parsing_failed { false };
};
}