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http-parser
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Use bit flags

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event_stream
Ryan 15 years ago
parent 004aff9001
commit e65dcfbcf2
2 changed files with 23 additions and 37 deletions
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19
http_parser.h
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@ -78,24 +78,7 @@ struct http_parser {
enum http_parser_type type;
size_t chunk_size;
/**
XXX
do this so no other code has to change, but make the field only 1 byte wide
instead of 2 (on x86/x86_64).
doing this not only shrinks the sizeof this struct by a byte but it ALSO
makes wrapping this in FFI way easier.
*/
union {
struct {
unsigned eating:1;
unsigned error:1;
};
struct {
unsigned char _flags;
};
};
char flags;
size_t body_read;

41
http_parser.rl
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@ -26,6 +26,10 @@
#include <limits.h>
#include <assert.h>
/* parser->flags */
#define EATING 0x01
#define ERROR 0x02
static int unhex[] = {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
@ -50,7 +54,7 @@ do { \
if (parser->FOR##_mark) { \
parser->FOR##_size += p - parser->FOR##_mark; \
if (parser->FOR##_size > MAX_FIELD_SIZE) { \
parser->error = 1; \
parser->flags |= ERROR; \
return 0; \
} \
if (parser->on_##FOR) { \
@ -63,7 +67,7 @@ do { \
#define RESET_PARSER(parser) \
parser->chunk_size = 0; \
parser->eating = 0; \
parser->flags = 0; \
parser->header_field_mark = NULL; \
parser->header_value_mark = NULL; \
parser->query_string_mark = NULL; \
@ -98,12 +102,12 @@ do { \
parser->body_read += tmp; \
parser->chunk_size -= tmp; \
if (0 == parser->chunk_size) { \
parser->eating = 0; \
parser->flags &= ~EATING; \
if (parser->transfer_encoding == HTTP_IDENTITY) { \
END_REQUEST; \
} \
} else { \
parser->eating = 1; \
parser->flags |= EATING; \
} \
} \
} while (0)
@ -144,7 +148,7 @@ do { \
action header_field {
CALLBACK(header_field);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
parser->header_field_mark = NULL;
@ -154,7 +158,7 @@ do { \
action header_value {
CALLBACK(header_value);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
parser->header_value_mark = NULL;
@ -164,7 +168,7 @@ do { \
action request_uri {
CALLBACK(uri);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
parser->uri_mark = NULL;
@ -174,7 +178,7 @@ do { \
action fragment {
CALLBACK(fragment);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
parser->fragment_mark = NULL;
@ -184,7 +188,7 @@ do { \
action query_string {
CALLBACK(query_string);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
parser->query_string_mark = NULL;
@ -194,7 +198,7 @@ do { \
action request_path {
CALLBACK(path);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
parser->path_mark = NULL;
@ -205,7 +209,7 @@ do { \
if(parser->on_headers_complete) {
callback_return_value = parser->on_headers_complete(parser);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
}
@ -215,7 +219,7 @@ do { \
if(parser->on_message_begin) {
callback_return_value = parser->on_message_begin(parser);
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
}
@ -223,7 +227,7 @@ do { \
action content_length {
if (parser->content_length > INT_MAX) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
parser->content_length *= 10;
@ -253,7 +257,7 @@ do { \
action skip_chunk_data {
SKIP_BODY(MIN(parser->chunk_size, REMAINING));
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
@ -285,7 +289,7 @@ do { \
SKIP_BODY(MIN(REMAINING, parser->content_length));
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
@ -420,7 +424,6 @@ http_parser_init (http_parser *parser, enum http_parser_type type)
%% write init;
parser->cs = cs;
parser->type = type;
parser->error = 0;
parser->on_message_begin = NULL;
parser->on_path = NULL;
@ -448,11 +451,11 @@ http_parser_execute (http_parser *parser, const char *buffer, size_t len)
p = buffer;
pe = buffer+len;
if (0 < parser->chunk_size && parser->eating) {
if (0 < parser->chunk_size && (parser->flags & EATING)) {
/* eat body */
SKIP_BODY(MIN(len, parser->chunk_size));
if (callback_return_value != 0) {
parser->error = 1;
parser->flags |= ERROR;
return 0;
}
}
@ -482,6 +485,6 @@ http_parser_execute (http_parser *parser, const char *buffer, size_t len)
int
http_parser_has_error (http_parser *parser)
{
if (parser->error) return 1;
if (parser->flags & ERROR) return 1;
return parser->cs == http_parser_error;
}

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