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[core] http_header_e <=> lshpack_static_hdr_idx 

map enum http_header_e to enum lshpack_static_hdr_idx
map enum lshpack_static_hdr_idx to enum http_header_e
This commit is contained in:
Glenn Strauss 2020-09-13 01:00:02 -04:00
parent 367f30a645
commit 3fbb5773e9
5 changed files with 261 additions and 8 deletions
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253
src/h2.c
View File

@ -22,6 +22,210 @@
#include "response.h" /* http_response_omit_header() */
/* lowercased field-names
* (32-byte record (power-2) and single block of memory for memory locality) */
static const char http_header_lc[][32] = {
[HTTP_HEADER_OTHER] = ""
,[HTTP_HEADER_ACCEPT] = "accept"
,[HTTP_HEADER_ACCEPT_ENCODING] = "accept-encoding"
,[HTTP_HEADER_ACCEPT_LANGUAGE] = "accept-language"
,[HTTP_HEADER_ACCEPT_RANGES] = "accept-ranges"
,[HTTP_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN]="access-control-allow-origin"
,[HTTP_HEADER_AGE] = "age"
,[HTTP_HEADER_ALLOW] = "allow"
,[HTTP_HEADER_ALT_SVC] = "alt-svc"
,[HTTP_HEADER_ALT_USED] = "alt-used"
,[HTTP_HEADER_AUTHORIZATION] = "authorization"
,[HTTP_HEADER_CACHE_CONTROL] = "cache-control"
,[HTTP_HEADER_CONNECTION] = "connection"
,[HTTP_HEADER_CONTENT_ENCODING] = "content-encoding"
,[HTTP_HEADER_CONTENT_LENGTH] = "content-length"
,[HTTP_HEADER_CONTENT_LOCATION] = "content-location"
,[HTTP_HEADER_CONTENT_RANGE] = "content-range"
,[HTTP_HEADER_CONTENT_SECURITY_POLICY] = "content-security-policy"
,[HTTP_HEADER_CONTENT_TYPE] = "content-type"
,[HTTP_HEADER_COOKIE] = "cookie"
,[HTTP_HEADER_DATE] = "date"
,[HTTP_HEADER_DNT] = "dnt"
,[HTTP_HEADER_ETAG] = "etag"
,[HTTP_HEADER_EXPECT] = "expect"
,[HTTP_HEADER_EXPECT_CT] = "expect-ct"
,[HTTP_HEADER_EXPIRES] = "expires"
,[HTTP_HEADER_FORWARDED] = "forwarded"
,[HTTP_HEADER_HOST] = "host"
,[HTTP_HEADER_HTTP2_SETTINGS] = "http2-settings"
,[HTTP_HEADER_IF_MATCH] = "if-match"
,[HTTP_HEADER_IF_MODIFIED_SINCE] = "if-modified-since"
,[HTTP_HEADER_IF_NONE_MATCH] = "if-none-match"
,[HTTP_HEADER_IF_RANGE] = "if-range"
,[HTTP_HEADER_IF_UNMODIFIED_SINCE] = "if-unmodified-since"
,[HTTP_HEADER_LAST_MODIFIED] = "last-modified"
,[HTTP_HEADER_LINK] = "link"
,[HTTP_HEADER_LOCATION] = "location"
,[HTTP_HEADER_ONION_LOCATION] = "onion-location"
,[HTTP_HEADER_P3P] = "p3p"
,[HTTP_HEADER_PRAGMA] = "pragma"
,[HTTP_HEADER_RANGE] = "range"
,[HTTP_HEADER_REFERER] = "referer"
,[HTTP_HEADER_REFERRER_POLICY] = "referrer-policy"
,[HTTP_HEADER_SERVER] = "server"
,[HTTP_HEADER_SET_COOKIE] = "set-cookie"
,[HTTP_HEADER_STATUS] = "status"
,[HTTP_HEADER_STRICT_TRANSPORT_SECURITY] = "strict-transport-security"
,[HTTP_HEADER_TE] = "te"
,[HTTP_HEADER_TRANSFER_ENCODING] = "transfer-encoding"
,[HTTP_HEADER_UPGRADE] = "upgrade"
,[HTTP_HEADER_UPGRADE_INSECURE_REQUESTS] = "upgrade-insecure-requests"
,[HTTP_HEADER_USER_AGENT] = "user-agent"
,[HTTP_HEADER_VARY] = "vary"
,[HTTP_HEADER_WWW_AUTHENTICATE] = "www-authenticate"
,[HTTP_HEADER_X_CONTENT_TYPE_OPTIONS] = "x-content-type-options"
,[HTTP_HEADER_X_FORWARDED_FOR] = "x-forwarded-for"
,[HTTP_HEADER_X_FORWARDED_PROTO] = "x-forwarded-proto"
,[HTTP_HEADER_X_FRAME_OPTIONS] = "x-frame-options"
,[HTTP_HEADER_X_XSS_PROTECTION] = "x-xss-protection"
};
/* future optimization: could conceivably store static XXH32() hash values for
* field-name (e.g. for benefit of entries marked LSHPACK_HDR_UNKNOWN) to
* incrementally reduce cost of calculating hash values for field-name on each
* request where those headers are used. Might also store single element
* static caches for "date:" value (updated each time static buffer is updated)
* and for "server:" value (often global to server), keyed on r->conf.server_tag
* pointer addr. HTTP_HEADER_STATUS could be overloaded for ":status", since
* lighttpd should not send "Status:" response header (should not happen) */
static const uint8_t http_header_lshpack_idx[] = {
[HTTP_HEADER_OTHER] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_ACCEPT_ENCODING] = LSHPACK_HDR_ACCEPT_ENCODING
,[HTTP_HEADER_AUTHORIZATION] = LSHPACK_HDR_AUTHORIZATION
,[HTTP_HEADER_CACHE_CONTROL] = LSHPACK_HDR_CACHE_CONTROL
,[HTTP_HEADER_CONNECTION] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_CONTENT_ENCODING] = LSHPACK_HDR_CONTENT_ENCODING
,[HTTP_HEADER_CONTENT_LENGTH] = LSHPACK_HDR_CONTENT_LENGTH
,[HTTP_HEADER_CONTENT_LOCATION] = LSHPACK_HDR_CONTENT_LOCATION
,[HTTP_HEADER_CONTENT_TYPE] = LSHPACK_HDR_CONTENT_TYPE
,[HTTP_HEADER_COOKIE] = LSHPACK_HDR_COOKIE
,[HTTP_HEADER_DATE] = LSHPACK_HDR_DATE
,[HTTP_HEADER_ETAG] = LSHPACK_HDR_ETAG
,[HTTP_HEADER_EXPECT] = LSHPACK_HDR_EXPECT
,[HTTP_HEADER_FORWARDED] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_HOST] = LSHPACK_HDR_HOST
,[HTTP_HEADER_IF_MODIFIED_SINCE] = LSHPACK_HDR_IF_MODIFIED_SINCE
,[HTTP_HEADER_IF_NONE_MATCH] = LSHPACK_HDR_IF_NONE_MATCH
,[HTTP_HEADER_LAST_MODIFIED] = LSHPACK_HDR_LAST_MODIFIED
,[HTTP_HEADER_LOCATION] = LSHPACK_HDR_LOCATION
,[HTTP_HEADER_RANGE] = LSHPACK_HDR_RANGE
,[HTTP_HEADER_SERVER] = LSHPACK_HDR_SERVER
,[HTTP_HEADER_SET_COOKIE] = LSHPACK_HDR_SET_COOKIE
,[HTTP_HEADER_STATUS] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_TRANSFER_ENCODING] = LSHPACK_HDR_TRANSFER_ENCODING
,[HTTP_HEADER_UPGRADE] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_USER_AGENT] = LSHPACK_HDR_USER_AGENT
,[HTTP_HEADER_VARY] = LSHPACK_HDR_VARY
,[HTTP_HEADER_X_FORWARDED_FOR] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_X_FORWARDED_PROTO] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_HTTP2_SETTINGS] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_ACCEPT] = LSHPACK_HDR_ACCEPT
,[HTTP_HEADER_ACCEPT_LANGUAGE] = LSHPACK_HDR_ACCEPT_LANGUAGE
,[HTTP_HEADER_ACCEPT_RANGES] = LSHPACK_HDR_ACCEPT_RANGES
,[HTTP_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN]=LSHPACK_HDR_ACCESS_CONTROL_ALLOW_ORIGIN
,[HTTP_HEADER_AGE] = LSHPACK_HDR_AGE
,[HTTP_HEADER_ALLOW] = LSHPACK_HDR_ALLOW
,[HTTP_HEADER_ALT_SVC] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_ALT_USED] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_CONTENT_RANGE] = LSHPACK_HDR_CONTENT_RANGE
,[HTTP_HEADER_CONTENT_SECURITY_POLICY] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_DNT] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_EXPECT_CT] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_EXPIRES] = LSHPACK_HDR_EXPIRES
,[HTTP_HEADER_IF_MATCH] = LSHPACK_HDR_IF_MATCH
,[HTTP_HEADER_IF_RANGE] = LSHPACK_HDR_IF_RANGE
,[HTTP_HEADER_IF_UNMODIFIED_SINCE] = LSHPACK_HDR_IF_UNMODIFIED_SINCE
,[HTTP_HEADER_LINK] = LSHPACK_HDR_LINK
,[HTTP_HEADER_ONION_LOCATION] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_P3P] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_PRAGMA] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_REFERER] = LSHPACK_HDR_REFERER
,[HTTP_HEADER_REFERRER_POLICY] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_STRICT_TRANSPORT_SECURITY] = LSHPACK_HDR_STRICT_TRANSPORT_SECURITY
,[HTTP_HEADER_TE] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_UPGRADE_INSECURE_REQUESTS] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_WWW_AUTHENTICATE] = LSHPACK_HDR_WWW_AUTHENTICATE
,[HTTP_HEADER_X_CONTENT_TYPE_OPTIONS] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_X_FRAME_OPTIONS] = LSHPACK_HDR_UNKNOWN
,[HTTP_HEADER_X_XSS_PROTECTION] = LSHPACK_HDR_UNKNOWN
};
/* Note: must be kept in sync with ls-hpack/lshpack.h:lshpack_static_hdr_idx[]*/
static const uint8_t lshpack_idx_http_header[] = {
[LSHPACK_HDR_UNKNOWN] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_AUTHORITY] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_METHOD_GET] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_METHOD_POST] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_PATH] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_PATH_INDEX_HTML] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_SCHEME_HTTP] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_SCHEME_HTTPS] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_STATUS_200] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_STATUS_204] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_STATUS_206] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_STATUS_304] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_STATUS_400] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_STATUS_404] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_STATUS_500] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_ACCEPT_CHARSET] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_ACCEPT_ENCODING] = HTTP_HEADER_ACCEPT_ENCODING
,[LSHPACK_HDR_ACCEPT_LANGUAGE] = HTTP_HEADER_ACCEPT_LANGUAGE
,[LSHPACK_HDR_ACCEPT_RANGES] = HTTP_HEADER_ACCEPT_RANGES
,[LSHPACK_HDR_ACCEPT] = HTTP_HEADER_ACCEPT
,[LSHPACK_HDR_ACCESS_CONTROL_ALLOW_ORIGIN]=HTTP_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN
,[LSHPACK_HDR_AGE] = HTTP_HEADER_AGE
,[LSHPACK_HDR_ALLOW] = HTTP_HEADER_ALLOW
,[LSHPACK_HDR_AUTHORIZATION] = HTTP_HEADER_AUTHORIZATION
,[LSHPACK_HDR_CACHE_CONTROL] = HTTP_HEADER_CACHE_CONTROL
,[LSHPACK_HDR_CONTENT_DISPOSITION] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_CONTENT_ENCODING] = HTTP_HEADER_CONTENT_ENCODING
,[LSHPACK_HDR_CONTENT_LANGUAGE] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_CONTENT_LENGTH] = HTTP_HEADER_CONTENT_LENGTH
,[LSHPACK_HDR_CONTENT_LOCATION] = HTTP_HEADER_CONTENT_LOCATION
,[LSHPACK_HDR_CONTENT_RANGE] = HTTP_HEADER_CONTENT_RANGE
,[LSHPACK_HDR_CONTENT_TYPE] = HTTP_HEADER_CONTENT_TYPE
,[LSHPACK_HDR_COOKIE] = HTTP_HEADER_COOKIE
,[LSHPACK_HDR_DATE] = HTTP_HEADER_DATE
,[LSHPACK_HDR_ETAG] = HTTP_HEADER_ETAG
,[LSHPACK_HDR_EXPECT] = HTTP_HEADER_EXPECT
,[LSHPACK_HDR_EXPIRES] = HTTP_HEADER_EXPIRES
,[LSHPACK_HDR_FROM] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_HOST] = HTTP_HEADER_HOST
,[LSHPACK_HDR_IF_MATCH] = HTTP_HEADER_IF_MATCH
,[LSHPACK_HDR_IF_MODIFIED_SINCE] = HTTP_HEADER_IF_MODIFIED_SINCE
,[LSHPACK_HDR_IF_NONE_MATCH] = HTTP_HEADER_IF_NONE_MATCH
,[LSHPACK_HDR_IF_RANGE] = HTTP_HEADER_IF_RANGE
,[LSHPACK_HDR_IF_UNMODIFIED_SINCE] = HTTP_HEADER_IF_UNMODIFIED_SINCE
,[LSHPACK_HDR_LAST_MODIFIED] = HTTP_HEADER_LAST_MODIFIED
,[LSHPACK_HDR_LINK] = HTTP_HEADER_LINK
,[LSHPACK_HDR_LOCATION] = HTTP_HEADER_LOCATION
,[LSHPACK_HDR_MAX_FORWARDS] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_PROXY_AUTHENTICATE] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_PROXY_AUTHORIZATION] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_RANGE] = HTTP_HEADER_RANGE
,[LSHPACK_HDR_REFERER] = HTTP_HEADER_REFERER
,[LSHPACK_HDR_REFRESH] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_RETRY_AFTER] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_SERVER] = HTTP_HEADER_SERVER
,[LSHPACK_HDR_SET_COOKIE] = HTTP_HEADER_SET_COOKIE
,[LSHPACK_HDR_STRICT_TRANSPORT_SECURITY] = HTTP_HEADER_STRICT_TRANSPORT_SECURITY
,[LSHPACK_HDR_TRANSFER_ENCODING] = HTTP_HEADER_TRANSFER_ENCODING
,[LSHPACK_HDR_USER_AGENT] = HTTP_HEADER_USER_AGENT
,[LSHPACK_HDR_VARY] = HTTP_HEADER_VARY
,[LSHPACK_HDR_VIA] = HTTP_HEADER_OTHER
,[LSHPACK_HDR_WWW_AUTHENTICATE] = HTTP_HEADER_WWW_AUTHENTICATE
};
static request_st * h2_init_stream (request_st * const h2r, connection * const con);
@ -937,12 +1141,32 @@ h2_parse_headers_frame (request_st * const restrict r, const unsigned char *psrc
hpctx.v = lsx.buf+lsx.val_offset;
hpctx.klen = lsx.name_len;
hpctx.vlen = lsx.val_len;
/*assert(lsx.hpack_index < sizeof(lshpack_idx_http_header));*/
hpctx.id = lshpack_idx_http_header[lsx.hpack_index];
if (log_request_header)
log_error(r->conf.errh, __FILE__, __LINE__,
"fd:%d id:%u rqst: %.*s: %.*s", r->con->fd, r->h2id,
(int)hpctx.klen, hpctx.k, (int)hpctx.vlen, hpctx.v);
#if 0
/* might not be worth special-casing pseudo headers here and
* repeating the code in http_request_parse_header() to avoid
* memcmp() for pseudo headers (request.c does not know ls-hpack)*/
if (hpctx.pseudo && lsx.hpack_index
&& lsx.hpack_index < LSHPACK_HDR_STATUS_200 && !trailers) {
/* lsx.hpack_index:
* LSHPACK_HDR_AUTHORITY
* LSHPACK_HDR_METHOD_GET
* LSHPACK_HDR_METHOD_POST
* LSHPACK_HDR_PATH
* LSHPACK_HDR_PATH_INDEX_HTML
* LSHPACK_HDR_SCHEME_HTTP
* LSHPACK_HDR_SCHEME_HTTPS
*/
}
#endif
r->http_status = http_request_parse_header(r, &hpctx);
if (0 != r->http_status)
break;
@ -1613,6 +1837,17 @@ h2_send_headers (request_st * const r, connection * const con)
lsx.name_len = 7;
lsx.val_offset = 9;
lsx.val_len = 3;
switch (r->http_status) {
case 200: lsx.hpack_index = LSHPACK_HDR_STATUS_200; break;
case 204: lsx.hpack_index = LSHPACK_HDR_STATUS_204; break;
case 206: lsx.hpack_index = LSHPACK_HDR_STATUS_206; break;
case 304: lsx.hpack_index = LSHPACK_HDR_STATUS_304; break;
case 400: lsx.hpack_index = LSHPACK_HDR_STATUS_400; break;
case 404: lsx.hpack_index = LSHPACK_HDR_STATUS_404; break;
case 500: lsx.hpack_index = LSHPACK_HDR_STATUS_500; break;
default:
break;
}
dst = lshpack_enc_encode(encoder, dst, dst_end, &lsx);
if (dst == (unsigned char *)tb->ptr) {
h2_send_rst_stream(r, con, H2_E_INTERNAL_ERROR);
@ -1626,8 +1861,6 @@ h2_send_headers (request_st * const r, connection * const con)
const uint32_t vlen = buffer_string_length(&ds->value);
const char * const restrict k = ds->key.ptr;
if (0 == vlen || 0 == klen) continue;
if ((k[0] & 0xdf) == 'X' && http_response_omit_header(r, ds))
continue;
alen += klen + vlen + 4;
if (alen > LSXPACK_MAX_STRLEN) {
@ -1644,8 +1877,17 @@ h2_send_headers (request_st * const r, connection * const con)
* Since keys are typically short, append (and lowercase) key onto
* end of value buffer */
char * const v = buffer_string_prepare_append(&ds->value, klen);
for (uint32_t j = 0; j < klen; ++j)
v[j] = !light_isupper(k[j]) ? k[j] : (k[j] | 0x20);
if (ds->ext != HTTP_HEADER_OTHER) {
memcpy(v, http_header_lc[ds->ext], klen);
}
else {
if ((k[0] & 0xdf) == 'X' && http_response_omit_header(r, ds)) {
alen -= klen + vlen + 4;
continue;
}
for (uint32_t j = 0; j < klen; ++j)
v[j] = !light_isupper(k[j]) ? k[j] : (k[j] | 0x20);
}
/*buffer_commit(&ds->value, klen);*//*(not necessary; truncated below)*/
uint32_t voff = 0;
@ -1657,6 +1899,7 @@ h2_send_headers (request_st * const r, connection * const con)
: memchr(lsx.buf+voff, '\n', vlen - voff);
memset(&lsx, 0, sizeof(lsxpack_header_t));
lsx.hpack_index = http_header_lshpack_idx[ds->ext];
lsx.buf = ds->value.ptr;
lsx.name_offset = vlen;
lsx.name_len = klen;
@ -1696,6 +1939,7 @@ h2_send_headers (request_st * const r, connection * const con)
lsx.name_len = 4;
lsx.val_offset = 6;
lsx.val_len = 29;
lsx.hpack_index = LSHPACK_HDR_DATE;
/* cache the generated timestamp */
static time_t tlast;
@ -1737,6 +1981,7 @@ h2_send_headers (request_st * const r, connection * const con)
lsx.name_len = 6;
lsx.val_offset = 8;
lsx.val_len = vlen;
lsx.hpack_index = LSHPACK_HDR_SERVER;
unsigned char * const dst_in = dst;
dst = lshpack_enc_encode(encoder, dst, dst_end, &lsx);
chunk_buffer_release(b);

3
src/http_header.c
View File

@ -24,6 +24,9 @@ typedef struct keyvlenvalue {
/* Note: must be sorted by length */
/* Note: must be kept in sync with http_header.h enum http_header_e */
/* Note: must be kept in sync http_headers[] and http_headers_off[] */
/* Note: must be kept in sync h2.c:http_header_lc[] */
/* Note: must be kept in sync h2.c:http_header_lshpack_idx[] */
/* Note: must be kept in sync h2.c:lshpack_idx_http_header[] */
/* http_headers_off lists first offset at which string of specific len occur */
static const int8_t http_headers_off[] = {
-1, -1, 0, 1, 4, 9, 11, 17, 21, 25, 27, -1, 30, 31,

3
src/http_header.h
View File

@ -11,6 +11,9 @@
* https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
*/
/* Note: must be kept in sync with http_header.c http_headers[] */
/* Note: must be kept in sync h2.c:http_header_lc[] */
/* Note: must be kept in sync h2.c:http_header_lshpack_idx[] */
/* Note: must be kept in sync h2.c:lshpack_idx_http_header[] */
/* Note: when adding new items, must replace OTHER in existing code for item */
/* Note: current implementation has limit of 64 htags
* Use of htags is an optimization for quick existence checks in lighttpd.

3
src/request.c
View File

@ -807,7 +807,8 @@ http_request_parse_header (request_st * const restrict r, http_header_parse_ctx
"invalid character in header -> 400");
}
const enum http_header_e id = http_header_hkey_get_lc(k, klen);
const enum http_header_e id =
hpctx->id ? hpctx->id : http_header_hkey_get_lc(k, klen);
return http_request_parse_single_header(r, id, k, klen, v, vlen);
}
}

7
src/request.h
View File

@ -199,9 +199,10 @@ typedef struct http_header_parse_ctx {
uint32_t klen;
uint32_t vlen;
uint32_t hlen;
int pseudo;
int scheme;
int trailers;
uint8_t pseudo;
uint8_t scheme;
uint8_t trailers;
uint8_t id;
uint32_t max_request_field_size;
unsigned int http_parseopts;
} http_header_parse_ctx;