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Remove redundancy in how token index is determined #1903

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Merged
merged 3 commits into from
Nov 15, 2018
Merged

Remove redundancy in how token index is determined #1903

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03c9083
remove token-specific fields from h2o_header_flags_t
kazuho Nov 15, 2018
d08a2bd
remove `token_index_plus1`
kazuho Nov 15, 2018
0b68155
regen
kazuho Nov 15, 2018
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27 changes: 6 additions & 21 deletions include/h2o/header.h
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,10 @@
extern "C" {
#endif

typedef struct st_h2o_header_flags_t {
unsigned char dont_compress : 1;
} h2o_header_flags_t;

/**
* represents a HTTP header
*/
Expand All @@ -46,8 +50,8 @@ typedef struct st_h2o_header_t {
*/
h2o_iovec_t value;
/**
* flags of the header
*/
* flags of the header
*/
h2o_header_flags_t flags;
} h2o_header_t;

Expand Down Expand Up @@ -103,14 +107,6 @@ ssize_t h2o_set_header_token(h2o_mem_pool_t *pool, h2o_headers_t *headers, const
* deletes a header from list
*/
ssize_t h2o_delete_header(h2o_headers_t *headers, ssize_t cursor);
/**
* validates the structure
*/
static void h2o_header_validate(const h2o_header_t *header);
/**
* returns an boolean value if given header's name is a token, with validation
*/
static int h2o_header_is_token(const h2o_header_t *header);

/* inline definitions */

Expand All @@ -123,17 +119,6 @@ inline int h2o_header_name_is_equal(const h2o_header_t *x, const h2o_header_t *y
}
}

inline void h2o_header_validate(const h2o_header_t *header)
{
assert(header->flags.token_index_plus1 == 0 || header->name == &h2o__tokens[header->flags.token_index_plus1 - 1].buf);
}

inline int h2o_header_is_token(const h2o_header_t *header)
{
h2o_header_validate(header);
return header->flags.token_index_plus1 != 0;
}

#ifdef __cplusplus
}
#endif
Expand Down
9 changes: 4 additions & 5 deletions include/h2o/token.h
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Original file line number Diff line number Diff line change
Expand Up @@ -29,23 +29,22 @@
extern "C" {
#endif

typedef struct st_h2o_header_flags_t {
unsigned char token_index_plus1; /* 1-origin, 0 means not token */
typedef struct st_h2o_token_flags_t {
char http2_static_table_name_index; /* non-zero if any */
unsigned char proxy_should_drop_for_req : 1;
unsigned char proxy_should_drop_for_res : 1;
unsigned char is_init_header_special : 1;
unsigned char http2_should_reject : 1;
unsigned char copy_for_push_request : 1;
unsigned char dont_compress : 1;
} h2o_header_flags_t;
unsigned char dont_compress : 1; /* consult `h2o_header_t:dont_compress` as well */
} h2o_token_flags_t;

/**
* a predefined, read-only, fast variant of h2o_iovec_t, defined in h2o/token.h
*/
typedef struct st_h2o_token_t {
h2o_iovec_t buf;
h2o_header_flags_t flags;
h2o_token_flags_t flags;
} h2o_token_t;

#ifndef H2O_MAX_TOKENS
Expand Down
3 changes: 1 addition & 2 deletions lib/common/http1client.c
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Original file line number Diff line number Diff line change
Expand Up @@ -267,14 +267,13 @@ static void on_head(h2o_socket_t *sock, const char *err)
token = h2o_lookup_token(src_headers[i].name, src_headers[i].name_len);
if (token != NULL) {
headers[i].name = (h2o_iovec_t *)&token->buf;
headers[i].flags = token->flags;
} else {
header_names[i] = h2o_iovec_init(src_headers[i].name, src_headers[i].name_len);
headers[i].name = &header_names[i];
headers[i].flags = (h2o_header_flags_t){0};
}
headers[i].value = h2o_iovec_init(src_headers[i].value, src_headers[i].value_len);
headers[i].orig_name = orig_name;
headers[i].flags = (h2o_header_flags_t){0};
}

if (!(100 <= http_status && http_status <= 199 && http_status != 101))
Expand Down
126 changes: 63 additions & 63 deletions lib/common/token_table.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,69 +21,69 @@
*/

/* DO NOT EDIT! generated by tokens.pl */
h2o_token_t h2o__tokens[] = {{{H2O_STRLIT(":authority")}, {1, 1, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":method")}, {2, 2, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":path")}, {3, 4, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":scheme")}, {4, 6, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":status")}, {5, 8, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("accept")}, {6, 19, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-charset")}, {7, 15, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-encoding")}, {8, 16, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-language")}, {9, 17, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-ranges")}, {10, 18, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("access-control-allow-origin")}, {11, 20, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("age")}, {12, 21, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("allow")}, {13, 22, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("authorization")}, {14, 23, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("cache-control")}, {15, 24, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("cache-digest")}, {16, 0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("connection")}, {17, 0, 1, 1, 0, 1, 0, 0}},
{{H2O_STRLIT("content-disposition")}, {18, 25, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-encoding")}, {19, 26, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-language")}, {20, 27, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-length")}, {21, 28, 0, 0, 1, 0, 0, 0}},
{{H2O_STRLIT("content-location")}, {22, 29, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-range")}, {23, 30, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-type")}, {24, 31, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("cookie")}, {25, 32, 0, 0, 0, 0, 0, 1}},
{{H2O_STRLIT("date")}, {26, 33, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("early-data")}, {27, 0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("etag")}, {28, 34, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("expect")}, {29, 35, 0, 0, 1, 0, 0, 0}},
{{H2O_STRLIT("expires")}, {30, 36, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("from")}, {31, 37, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("host")}, {32, 38, 0, 0, 1, 1, 0, 0}},
{{H2O_STRLIT("http2-settings")}, {33, 0, 1, 0, 0, 1, 0, 0}},
{{H2O_STRLIT("if-match")}, {34, 39, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-modified-since")}, {35, 40, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-none-match")}, {36, 41, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-range")}, {37, 42, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-unmodified-since")}, {38, 43, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("keep-alive")}, {39, 0, 1, 1, 0, 0, 0, 0}},
{{H2O_STRLIT("last-modified")}, {40, 44, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("link")}, {41, 45, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("location")}, {42, 46, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("max-forwards")}, {43, 47, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("proxy-authenticate")}, {44, 48, 1, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("proxy-authorization")}, {45, 49, 1, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("range")}, {46, 50, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("referer")}, {47, 51, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("refresh")}, {48, 52, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("retry-after")}, {49, 53, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("server")}, {50, 54, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("set-cookie")}, {51, 55, 0, 0, 0, 0, 0, 1}},
{{H2O_STRLIT("strict-transport-security")}, {52, 56, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("te")}, {53, 0, 1, 0, 0, 1, 0, 0}},
{{H2O_STRLIT("transfer-encoding")}, {54, 57, 1, 1, 1, 1, 0, 0}},
{{H2O_STRLIT("upgrade")}, {55, 0, 1, 1, 1, 1, 0, 0}},
{{H2O_STRLIT("user-agent")}, {56, 58, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("vary")}, {57, 59, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("via")}, {58, 60, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("www-authenticate")}, {59, 61, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-compress-hint")}, {60, 0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-forwarded-for")}, {61, 0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-reproxy-url")}, {62, 0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-traffic")}, {63, 0, 0, 0, 0, 0, 0, 0}}};
h2o_token_t h2o__tokens[] = {{{H2O_STRLIT(":authority")}, {1, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":method")}, {2, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":path")}, {4, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":scheme")}, {6, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT(":status")}, {8, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("accept")}, {19, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-charset")}, {15, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-encoding")}, {16, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-language")}, {17, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("accept-ranges")}, {18, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("access-control-allow-origin")}, {20, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("age")}, {21, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("allow")}, {22, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("authorization")}, {23, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("cache-control")}, {24, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("cache-digest")}, {0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("connection")}, {0, 1, 1, 0, 1, 0, 0}},
{{H2O_STRLIT("content-disposition")}, {25, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-encoding")}, {26, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-language")}, {27, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-length")}, {28, 0, 0, 1, 0, 0, 0}},
{{H2O_STRLIT("content-location")}, {29, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-range")}, {30, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("content-type")}, {31, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("cookie")}, {32, 0, 0, 0, 0, 0, 1}},
{{H2O_STRLIT("date")}, {33, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("early-data")}, {0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("etag")}, {34, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("expect")}, {35, 0, 0, 1, 0, 0, 0}},
{{H2O_STRLIT("expires")}, {36, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("from")}, {37, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("host")}, {38, 0, 0, 1, 1, 0, 0}},
{{H2O_STRLIT("http2-settings")}, {0, 1, 0, 0, 1, 0, 0}},
{{H2O_STRLIT("if-match")}, {39, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-modified-since")}, {40, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-none-match")}, {41, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-range")}, {42, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("if-unmodified-since")}, {43, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("keep-alive")}, {0, 1, 1, 0, 0, 0, 0}},
{{H2O_STRLIT("last-modified")}, {44, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("link")}, {45, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("location")}, {46, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("max-forwards")}, {47, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("proxy-authenticate")}, {48, 1, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("proxy-authorization")}, {49, 1, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("range")}, {50, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("referer")}, {51, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("refresh")}, {52, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("retry-after")}, {53, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("server")}, {54, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("set-cookie")}, {55, 0, 0, 0, 0, 0, 1}},
{{H2O_STRLIT("strict-transport-security")}, {56, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("te")}, {0, 1, 0, 0, 1, 0, 0}},
{{H2O_STRLIT("transfer-encoding")}, {57, 1, 1, 1, 1, 0, 0}},
{{H2O_STRLIT("upgrade")}, {0, 1, 1, 1, 1, 0, 0}},
{{H2O_STRLIT("user-agent")}, {58, 0, 0, 0, 0, 1, 0}},
{{H2O_STRLIT("vary")}, {59, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("via")}, {60, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("www-authenticate")}, {61, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-compress-hint")}, {0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-forwarded-for")}, {0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-reproxy-url")}, {0, 0, 0, 0, 0, 0, 0}},
{{H2O_STRLIT("x-traffic")}, {0, 0, 0, 0, 0, 0, 0}}};
size_t h2o__num_tokens = 63;

const h2o_token_t *h2o_lookup_token(const char *name, size_t len)
Expand Down
4 changes: 2 additions & 2 deletions lib/core/headers.c
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Original file line number Diff line number Diff line change
Expand Up @@ -63,7 +63,7 @@ ssize_t h2o_find_header_by_str(const h2o_headers_t *headers, const char *name, s
ssize_t h2o_add_header(h2o_mem_pool_t *pool, h2o_headers_t *headers, const h2o_token_t *token, const char *orig_name,
const char *value, size_t value_len)
{
return add_header(pool, headers, (h2o_iovec_t *)&token->buf, orig_name, value, value_len, token->flags);
return add_header(pool, headers, (h2o_iovec_t *)&token->buf, orig_name, value, value_len, (h2o_header_flags_t){0});
}

ssize_t h2o_add_header_by_str(h2o_mem_pool_t *pool, h2o_headers_t *headers, const char *name, size_t name_len, int maybe_token,
Expand All @@ -74,7 +74,7 @@ ssize_t h2o_add_header_by_str(h2o_mem_pool_t *pool, h2o_headers_t *headers, cons
if (maybe_token) {
const h2o_token_t *token = h2o_lookup_token(name, name_len);
if (token != NULL) {
return add_header(pool, headers, (h2o_iovec_t *)token, orig_name, value, value_len, token->flags);
return add_header(pool, headers, (h2o_iovec_t *)token, orig_name, value, value_len, (h2o_header_flags_t){0});
}
}
name_buf = h2o_mem_alloc_pool(pool, *name_buf, 1);
Expand Down
12 changes: 6 additions & 6 deletions lib/core/proxy.c
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Expand Up @@ -212,10 +212,10 @@ static void build_request(h2o_req_t *req, h2o_iovec_t *method, h2o_url_t *url, h
const h2o_header_t *h, *h_end;
int found_early_data = 0;
for (h = req_headers.entries, h_end = h + req_headers.size; h != h_end; ++h) {
if (h->flags.proxy_should_drop_for_req)
continue;
if (h2o_header_is_token(h)) {
if (h2o_iovec_is_token(h->name)) {
const h2o_token_t *token = (void *)h->name;
if (token->flags.proxy_should_drop_for_req)
continue;
if (token == H2O_TOKEN_COOKIE) {
/* merge the cookie headers; see HTTP/2 8.1.2.5 and HTTP/1 (RFC6265 5.4) */
/* FIXME current algorithm is O(n^2) against the number of cookie headers */
Expand Down Expand Up @@ -429,10 +429,10 @@ static h2o_httpclient_body_cb on_head(h2o_httpclient_t *client, const char *errs
req->res.reason = h2o_strdup(&req->pool, msg.base, msg.len).base;
for (i = 0; i != num_headers; ++i) {
h2o_iovec_t value = headers[i].value;
if (headers[i].flags.proxy_should_drop_for_res)
continue;
if (h2o_header_is_token(&headers[i])) {
if (h2o_iovec_is_token(headers[i].name)) {
const h2o_token_t *token = H2O_STRUCT_FROM_MEMBER(h2o_token_t, buf, headers[i].name);
if (token->flags.proxy_should_drop_for_res)
continue;
if (token == H2O_TOKEN_CONTENT_LENGTH) {
if (req->res.content_length != SIZE_MAX ||
(req->res.content_length = h2o_strtosize(headers[i].value.base, headers[i].value.len)) == SIZE_MAX) {
Expand Down
2 changes: 1 addition & 1 deletion lib/core/request.c
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Expand Up @@ -284,7 +284,7 @@ void h2o_init_request(h2o_req_t *req, h2o_conn_t *conn, h2o_req_t *src)
req->headers.size = src->headers.size;
for (i = 0; i != src->headers.size; ++i) {
h2o_header_t *dst_header = req->headers.entries + i, *src_header = src->headers.entries + i;
if (h2o_header_is_token(src_header)) {
if (h2o_iovec_is_token(src_header->name)) {
dst_header->name = src_header->name;
} else {
dst_header->name = h2o_mem_alloc_pool(&req->pool, *dst_header->name, 1);
Expand Down
2 changes: 1 addition & 1 deletion lib/handler/mruby.c
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Expand Up @@ -689,7 +689,7 @@ static int iterate_headers_callback(h2o_mruby_shared_context_t *shared_ctx, h2o_
{
mrb_value env = mrb_obj_value(cb_data);
mrb_value n;
if (h2o_header_is_token(header)) {
if (h2o_iovec_is_token(header->name)) {
const h2o_token_t *token = H2O_STRUCT_FROM_MEMBER(h2o_token_t, buf, header->name);
n = h2o_mruby_token_env_key(shared_ctx, token);
} else {
Expand Down
2 changes: 1 addition & 1 deletion lib/handler/mruby/middleware.c
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Expand Up @@ -147,7 +147,7 @@ static int iterate_headers_callback(h2o_mruby_shared_context_t *shared_ctx, h2o_
{
mrb_value result_hash = mrb_obj_value(cb_data);
mrb_value n;
if (h2o_header_is_token(header)) {
if (h2o_iovec_is_token(header->name)) {
const h2o_token_t *token = H2O_STRUCT_FROM_MEMBER(h2o_token_t, buf, header->name);
n = h2o_mruby_token_string(shared_ctx, token);
} else {
Expand Down
2 changes: 1 addition & 1 deletion lib/http1.c
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Expand Up @@ -360,7 +360,7 @@ static ssize_t fixup_request(struct st_h2o_http1_conn_t *conn, struct phr_header
conn->req.input.path = h2o_strdup(&conn->req.pool, conn->req.input.path.base, conn->req.input.path.len);
for (i = 0; i != conn->req.headers.size; ++i) {
h2o_header_t *header = conn->req.headers.entries + i;
if (!h2o_header_is_token(header)) {
if (!h2o_iovec_is_token(header->name)) {
*header->name = h2o_strdup(&conn->req.pool, header->name->base, header->name->len);
}
header->value = h2o_strdup(&conn->req.pool, header->value.base, header->value.len);
Expand Down
11 changes: 6 additions & 5 deletions lib/http2/connection.c
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Expand Up @@ -1495,12 +1495,13 @@ static void push_path(h2o_req_t *src_req, const char *abspath, size_t abspath_le
size_t i;
for (i = 0; i != src_stream->req.headers.size; ++i) {
h2o_header_t *src_header = src_stream->req.headers.entries + i;
if (src_header->flags.copy_for_push_request) {
assert(h2o_header_is_token(src_header)); /* currently only predefined headers are copiable*/
/* currently only predefined headers are copiable */
if (h2o_iovec_is_token(src_header->name)) {
h2o_token_t *token = H2O_STRUCT_FROM_MEMBER(h2o_token_t, buf, src_header->name);
h2o_add_header(&stream->req.pool, &stream->req.headers, token, NULL,
h2o_strdup(&stream->req.pool, src_header->value.base, src_header->value.len).base,
src_header->value.len);
if (token->flags.copy_for_push_request)
h2o_add_header(&stream->req.pool, &stream->req.headers, token, NULL,
h2o_strdup(&stream->req.pool, src_header->value.base, src_header->value.len).base,
src_header->value.len);
}
}
}
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