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http2.cc
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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "http2.h"
#include "llhttp.h"
#include "util.h"
namespace nghttp2 {
namespace http2 {
StringRef get_reason_phrase(unsigned int status_code) {
switch (status_code) {
case 100:
return StringRef::from_lit("Continue");
case 101:
return StringRef::from_lit("Switching Protocols");
case 103:
return StringRef::from_lit("Early Hints");
case 200:
return StringRef::from_lit("OK");
case 201:
return StringRef::from_lit("Created");
case 202:
return StringRef::from_lit("Accepted");
case 203:
return StringRef::from_lit("Non-Authoritative Information");
case 204:
return StringRef::from_lit("No Content");
case 205:
return StringRef::from_lit("Reset Content");
case 206:
return StringRef::from_lit("Partial Content");
case 300:
return StringRef::from_lit("Multiple Choices");
case 301:
return StringRef::from_lit("Moved Permanently");
case 302:
return StringRef::from_lit("Found");
case 303:
return StringRef::from_lit("See Other");
case 304:
return StringRef::from_lit("Not Modified");
case 305:
return StringRef::from_lit("Use Proxy");
// case 306: return StringRef::from_lit("(Unused)");
case 307:
return StringRef::from_lit("Temporary Redirect");
case 308:
return StringRef::from_lit("Permanent Redirect");
case 400:
return StringRef::from_lit("Bad Request");
case 401:
return StringRef::from_lit("Unauthorized");
case 402:
return StringRef::from_lit("Payment Required");
case 403:
return StringRef::from_lit("Forbidden");
case 404:
return StringRef::from_lit("Not Found");
case 405:
return StringRef::from_lit("Method Not Allowed");
case 406:
return StringRef::from_lit("Not Acceptable");
case 407:
return StringRef::from_lit("Proxy Authentication Required");
case 408:
return StringRef::from_lit("Request Timeout");
case 409:
return StringRef::from_lit("Conflict");
case 410:
return StringRef::from_lit("Gone");
case 411:
return StringRef::from_lit("Length Required");
case 412:
return StringRef::from_lit("Precondition Failed");
case 413:
return StringRef::from_lit("Payload Too Large");
case 414:
return StringRef::from_lit("URI Too Long");
case 415:
return StringRef::from_lit("Unsupported Media Type");
case 416:
return StringRef::from_lit("Requested Range Not Satisfiable");
case 417:
return StringRef::from_lit("Expectation Failed");
case 421:
return StringRef::from_lit("Misdirected Request");
case 425:
// https://tools.ietf.org/html/rfc8470
return StringRef::from_lit("Too Early");
case 426:
return StringRef::from_lit("Upgrade Required");
case 428:
return StringRef::from_lit("Precondition Required");
case 429:
return StringRef::from_lit("Too Many Requests");
case 431:
return StringRef::from_lit("Request Header Fields Too Large");
case 451:
return StringRef::from_lit("Unavailable For Legal Reasons");
case 500:
return StringRef::from_lit("Internal Server Error");
case 501:
return StringRef::from_lit("Not Implemented");
case 502:
return StringRef::from_lit("Bad Gateway");
case 503:
return StringRef::from_lit("Service Unavailable");
case 504:
return StringRef::from_lit("Gateway Timeout");
case 505:
return StringRef::from_lit("HTTP Version Not Supported");
case 511:
return StringRef::from_lit("Network Authentication Required");
default:
return StringRef{};
}
}
StringRef stringify_status(BlockAllocator &balloc, unsigned int status_code) {
switch (status_code) {
case 100:
return StringRef::from_lit("100");
case 101:
return StringRef::from_lit("101");
case 103:
return StringRef::from_lit("103");
case 200:
return StringRef::from_lit("200");
case 201:
return StringRef::from_lit("201");
case 202:
return StringRef::from_lit("202");
case 203:
return StringRef::from_lit("203");
case 204:
return StringRef::from_lit("204");
case 205:
return StringRef::from_lit("205");
case 206:
return StringRef::from_lit("206");
case 300:
return StringRef::from_lit("300");
case 301:
return StringRef::from_lit("301");
case 302:
return StringRef::from_lit("302");
case 303:
return StringRef::from_lit("303");
case 304:
return StringRef::from_lit("304");
case 305:
return StringRef::from_lit("305");
// case 306: return StringRef::from_lit("306");
case 307:
return StringRef::from_lit("307");
case 308:
return StringRef::from_lit("308");
case 400:
return StringRef::from_lit("400");
case 401:
return StringRef::from_lit("401");
case 402:
return StringRef::from_lit("402");
case 403:
return StringRef::from_lit("403");
case 404:
return StringRef::from_lit("404");
case 405:
return StringRef::from_lit("405");
case 406:
return StringRef::from_lit("406");
case 407:
return StringRef::from_lit("407");
case 408:
return StringRef::from_lit("408");
case 409:
return StringRef::from_lit("409");
case 410:
return StringRef::from_lit("410");
case 411:
return StringRef::from_lit("411");
case 412:
return StringRef::from_lit("412");
case 413:
return StringRef::from_lit("413");
case 414:
return StringRef::from_lit("414");
case 415:
return StringRef::from_lit("415");
case 416:
return StringRef::from_lit("416");
case 417:
return StringRef::from_lit("417");
case 421:
return StringRef::from_lit("421");
case 426:
return StringRef::from_lit("426");
case 428:
return StringRef::from_lit("428");
case 429:
return StringRef::from_lit("429");
case 431:
return StringRef::from_lit("431");
case 451:
return StringRef::from_lit("451");
case 500:
return StringRef::from_lit("500");
case 501:
return StringRef::from_lit("501");
case 502:
return StringRef::from_lit("502");
case 503:
return StringRef::from_lit("503");
case 504:
return StringRef::from_lit("504");
case 505:
return StringRef::from_lit("505");
case 511:
return StringRef::from_lit("511");
default:
return util::make_string_ref_uint(balloc, status_code);
}
}
void capitalize(DefaultMemchunks *buf, const StringRef &s) {
buf->append(util::upcase(s[0]));
for (size_t i = 1; i < s.size(); ++i) {
if (s[i - 1] == '-') {
buf->append(util::upcase(s[i]));
} else {
buf->append(s[i]);
}
}
}
bool lws(const char *value) {
for (; *value; ++value) {
switch (*value) {
case '\t':
case ' ':
continue;
default:
return false;
}
}
return true;
}
void copy_url_component(std::string &dest, const http_parser_url *u, int field,
const char *url) {
if (u->field_set & (1 << field)) {
dest.assign(url + u->field_data[field].off, u->field_data[field].len);
}
}
Headers::value_type to_header(const uint8_t *name, size_t namelen,
const uint8_t *value, size_t valuelen,
bool no_index, int32_t token) {
return Header(std::string(reinterpret_cast<const char *>(name), namelen),
std::string(reinterpret_cast<const char *>(value), valuelen),
no_index, token);
}
void add_header(Headers &nva, const uint8_t *name, size_t namelen,
const uint8_t *value, size_t valuelen, bool no_index,
int32_t token) {
if (valuelen > 0) {
size_t i, j;
for (i = 0; i < valuelen && (value[i] == ' ' || value[i] == '\t'); ++i)
;
for (j = valuelen - 1; j > i && (value[j] == ' ' || value[j] == '\t'); --j)
;
value += i;
valuelen -= i + (valuelen - j - 1);
}
nva.push_back(to_header(name, namelen, value, valuelen, no_index, token));
}
const Headers::value_type *get_header(const Headers &nva, const char *name) {
const Headers::value_type *res = nullptr;
for (auto &nv : nva) {
if (nv.name == name) {
res = &nv;
}
}
return res;
}
bool non_empty_value(const HeaderRefs::value_type *nv) {
return nv && !nv->value.empty();
}
namespace {
nghttp2_nv make_nv_internal(const std::string &name, const std::string &value,
bool no_index, uint8_t nv_flags) {
uint8_t flags;
flags =
nv_flags | (no_index ? NGHTTP2_NV_FLAG_NO_INDEX : NGHTTP2_NV_FLAG_NONE);
return {(uint8_t *)name.c_str(), (uint8_t *)value.c_str(), name.size(),
value.size(), flags};
}
} // namespace
namespace {
nghttp2_nv make_nv_internal(const StringRef &name, const StringRef &value,
bool no_index, uint8_t nv_flags) {
uint8_t flags;
flags =
nv_flags | (no_index ? NGHTTP2_NV_FLAG_NO_INDEX : NGHTTP2_NV_FLAG_NONE);
return {(uint8_t *)name.c_str(), (uint8_t *)value.c_str(), name.size(),
value.size(), flags};
}
} // namespace
nghttp2_nv make_nv(const std::string &name, const std::string &value,
bool no_index) {
return make_nv_internal(name, value, no_index, NGHTTP2_NV_FLAG_NONE);
}
nghttp2_nv make_nv(const StringRef &name, const StringRef &value,
bool no_index) {
return make_nv_internal(name, value, no_index, NGHTTP2_NV_FLAG_NONE);
}
nghttp2_nv make_nv_nocopy(const std::string &name, const std::string &value,
bool no_index) {
return make_nv_internal(name, value, no_index,
NGHTTP2_NV_FLAG_NO_COPY_NAME |
NGHTTP2_NV_FLAG_NO_COPY_VALUE);
}
nghttp2_nv make_nv_nocopy(const StringRef &name, const StringRef &value,
bool no_index) {
return make_nv_internal(name, value, no_index,
NGHTTP2_NV_FLAG_NO_COPY_NAME |
NGHTTP2_NV_FLAG_NO_COPY_VALUE);
}
namespace {
void copy_headers_to_nva_internal(std::vector<nghttp2_nv> &nva,
const HeaderRefs &headers, uint8_t nv_flags,
uint32_t flags) {
auto it_forwarded = std::end(headers);
auto it_xff = std::end(headers);
auto it_xfp = std::end(headers);
auto it_via = std::end(headers);
for (auto it = std::begin(headers); it != std::end(headers); ++it) {
auto kv = &(*it);
if (kv->name.empty() || kv->name[0] == ':') {
continue;
}
switch (kv->token) {
case HD_COOKIE:
case HD_CONNECTION:
case HD_HOST:
case HD_HTTP2_SETTINGS:
case HD_KEEP_ALIVE:
case HD_PROXY_CONNECTION:
case HD_SERVER:
case HD_TE:
case HD_TRANSFER_ENCODING:
case HD_UPGRADE:
continue;
case HD_EARLY_DATA:
if (flags & HDOP_STRIP_EARLY_DATA) {
continue;
}
break;
case HD_SEC_WEBSOCKET_ACCEPT:
if (flags & HDOP_STRIP_SEC_WEBSOCKET_ACCEPT) {
continue;
}
break;
case HD_SEC_WEBSOCKET_KEY:
if (flags & HDOP_STRIP_SEC_WEBSOCKET_KEY) {
continue;
}
break;
case HD_FORWARDED:
if (flags & HDOP_STRIP_FORWARDED) {
continue;
}
if (it_forwarded == std::end(headers)) {
it_forwarded = it;
continue;
}
kv = &(*it_forwarded);
it_forwarded = it;
break;
case HD_X_FORWARDED_FOR:
if (flags & HDOP_STRIP_X_FORWARDED_FOR) {
continue;
}
if (it_xff == std::end(headers)) {
it_xff = it;
continue;
}
kv = &(*it_xff);
it_xff = it;
break;
case HD_X_FORWARDED_PROTO:
if (flags & HDOP_STRIP_X_FORWARDED_PROTO) {
continue;
}
if (it_xfp == std::end(headers)) {
it_xfp = it;
continue;
}
kv = &(*it_xfp);
it_xfp = it;
break;
case HD_VIA:
if (flags & HDOP_STRIP_VIA) {
continue;
}
if (it_via == std::end(headers)) {
it_via = it;
continue;
}
kv = &(*it_via);
it_via = it;
break;
}
nva.push_back(
make_nv_internal(kv->name, kv->value, kv->no_index, nv_flags));
}
}
} // namespace
void copy_headers_to_nva(std::vector<nghttp2_nv> &nva,
const HeaderRefs &headers, uint32_t flags) {
copy_headers_to_nva_internal(nva, headers, NGHTTP2_NV_FLAG_NONE, flags);
}
void copy_headers_to_nva_nocopy(std::vector<nghttp2_nv> &nva,
const HeaderRefs &headers, uint32_t flags) {
copy_headers_to_nva_internal(
nva, headers,
NGHTTP2_NV_FLAG_NO_COPY_NAME | NGHTTP2_NV_FLAG_NO_COPY_VALUE, flags);
}
void build_http1_headers_from_headers(DefaultMemchunks *buf,
const HeaderRefs &headers,
uint32_t flags) {
auto it_forwarded = std::end(headers);
auto it_xff = std::end(headers);
auto it_xfp = std::end(headers);
auto it_via = std::end(headers);
for (auto it = std::begin(headers); it != std::end(headers); ++it) {
auto kv = &(*it);
if (kv->name.empty() || kv->name[0] == ':') {
continue;
}
switch (kv->token) {
case HD_CONNECTION:
case HD_COOKIE:
case HD_HOST:
case HD_HTTP2_SETTINGS:
case HD_KEEP_ALIVE:
case HD_PROXY_CONNECTION:
case HD_SERVER:
case HD_UPGRADE:
continue;
case HD_EARLY_DATA:
if (flags & HDOP_STRIP_EARLY_DATA) {
continue;
}
break;
case HD_TRANSFER_ENCODING:
if (flags & HDOP_STRIP_TRANSFER_ENCODING) {
continue;
}
break;
case HD_FORWARDED:
if (flags & HDOP_STRIP_FORWARDED) {
continue;
}
if (it_forwarded == std::end(headers)) {
it_forwarded = it;
continue;
}
kv = &(*it_forwarded);
it_forwarded = it;
break;
case HD_X_FORWARDED_FOR:
if (flags & HDOP_STRIP_X_FORWARDED_FOR) {
continue;
}
if (it_xff == std::end(headers)) {
it_xff = it;
continue;
}
kv = &(*it_xff);
it_xff = it;
break;
case HD_X_FORWARDED_PROTO:
if (flags & HDOP_STRIP_X_FORWARDED_PROTO) {
continue;
}
if (it_xfp == std::end(headers)) {
it_xfp = it;
continue;
}
kv = &(*it_xfp);
it_xfp = it;
break;
case HD_VIA:
if (flags & HDOP_STRIP_VIA) {
continue;
}
if (it_via == std::end(headers)) {
it_via = it;
continue;
}
kv = &(*it_via);
it_via = it;
break;
}
capitalize(buf, kv->name);
buf->append(": ");
buf->append(kv->value);
buf->append("\r\n");
}
}
int32_t determine_window_update_transmission(nghttp2_session *session,
int32_t stream_id) {
int32_t recv_length, window_size;
if (stream_id == 0) {
recv_length = nghttp2_session_get_effective_recv_data_length(session);
window_size = nghttp2_session_get_effective_local_window_size(session);
} else {
recv_length = nghttp2_session_get_stream_effective_recv_data_length(
session, stream_id);
window_size = nghttp2_session_get_stream_effective_local_window_size(
session, stream_id);
}
if (recv_length != -1 && window_size != -1) {
if (recv_length >= window_size / 2) {
return recv_length;
}
}
return -1;
}
void dump_nv(FILE *out, const char **nv) {
for (size_t i = 0; nv[i]; i += 2) {
fprintf(out, "%s: %s\n", nv[i], nv[i + 1]);
}
fputc('\n', out);
fflush(out);
}
void dump_nv(FILE *out, const nghttp2_nv *nva, size_t nvlen) {
auto end = nva + nvlen;
for (; nva != end; ++nva) {
fprintf(out, "%s: %s\n", nva->name, nva->value);
}
fputc('\n', out);
fflush(out);
}
void dump_nv(FILE *out, const Headers &nva) {
for (auto &nv : nva) {
fprintf(out, "%s: %s\n", nv.name.c_str(), nv.value.c_str());
}
fputc('\n', out);
fflush(out);
}
void dump_nv(FILE *out, const HeaderRefs &nva) {
for (auto &nv : nva) {
fprintf(out, "%s: %s\n", nv.name.c_str(), nv.value.c_str());
}
fputc('\n', out);
fflush(out);
}
void erase_header(HeaderRef *hd) {
hd->name = StringRef{};
hd->token = -1;
}
StringRef rewrite_location_uri(BlockAllocator &balloc, const StringRef &uri,
const http_parser_url &u,
const StringRef &match_host,
const StringRef &request_authority,
const StringRef &upstream_scheme) {
// We just rewrite scheme and authority.
if ((u.field_set & (1 << UF_HOST)) == 0) {
return StringRef{};
}
auto field = &u.field_data[UF_HOST];
if (!util::starts_with(std::begin(match_host), std::end(match_host),
&uri[field->off], &uri[field->off] + field->len) ||
(match_host.size() != field->len && match_host[field->len] != ':')) {
return StringRef{};
}
auto len = 0;
if (!request_authority.empty()) {
len += upstream_scheme.size() + str_size("://") + request_authority.size();
}
if (u.field_set & (1 << UF_PATH)) {
field = &u.field_data[UF_PATH];
len += field->len;
}
if (u.field_set & (1 << UF_QUERY)) {
field = &u.field_data[UF_QUERY];
len += 1 + field->len;
}
if (u.field_set & (1 << UF_FRAGMENT)) {
field = &u.field_data[UF_FRAGMENT];
len += 1 + field->len;
}
auto iov = make_byte_ref(balloc, len + 1);
auto p = iov.base;
if (!request_authority.empty()) {
p = std::copy(std::begin(upstream_scheme), std::end(upstream_scheme), p);
p = util::copy_lit(p, "://");
p = std::copy(std::begin(request_authority), std::end(request_authority),
p);
}
if (u.field_set & (1 << UF_PATH)) {
field = &u.field_data[UF_PATH];
p = std::copy_n(&uri[field->off], field->len, p);
}
if (u.field_set & (1 << UF_QUERY)) {
field = &u.field_data[UF_QUERY];
*p++ = '?';
p = std::copy_n(&uri[field->off], field->len, p);
}
if (u.field_set & (1 << UF_FRAGMENT)) {
field = &u.field_data[UF_FRAGMENT];
*p++ = '#';
p = std::copy_n(&uri[field->off], field->len, p);
}
*p = '\0';
return StringRef{iov.base, p};
}
int parse_http_status_code(const StringRef &src) {
if (src.size() != 3) {
return -1;
}
int status = 0;
for (auto c : src) {
if (!isdigit(c)) {
return -1;
}
status *= 10;
status += c - '0';
}
if (status < 100) {
return -1;
}
return status;
}
int lookup_token(const StringRef &name) {
return lookup_token(name.byte(), name.size());
}
// This function was generated by genheaderfunc.py. Inspired by h2o
// header lookup. https://github.com/h2o/h2o
int lookup_token(const uint8_t *name, size_t namelen) {
switch (namelen) {
case 2:
switch (name[1]) {
case 'e':
if (util::streq_l("t", name, 1)) {
return HD_TE;
}
break;
}
break;
case 3:
switch (name[2]) {
case 'a':
if (util::streq_l("vi", name, 2)) {
return HD_VIA;
}
break;
}
break;
case 4:
switch (name[3]) {
case 'e':
if (util::streq_l("dat", name, 3)) {
return HD_DATE;
}
break;
case 'k':
if (util::streq_l("lin", name, 3)) {
return HD_LINK;
}
break;
case 't':
if (util::streq_l("hos", name, 3)) {
return HD_HOST;
}
break;
}
break;
case 5:
switch (name[4]) {
case 'h':
if (util::streq_l(":pat", name, 4)) {
return HD__PATH;
}
break;
case 't':
if (util::streq_l(":hos", name, 4)) {
return HD__HOST;
}
break;
}
break;
case 6:
switch (name[5]) {
case 'e':
if (util::streq_l("cooki", name, 5)) {
return HD_COOKIE;
}
break;
case 'r':
if (util::streq_l("serve", name, 5)) {
return HD_SERVER;
}
break;
case 't':
if (util::streq_l("expec", name, 5)) {
return HD_EXPECT;
}
break;
}
break;
case 7:
switch (name[6]) {
case 'c':
if (util::streq_l("alt-sv", name, 6)) {
return HD_ALT_SVC;
}
break;
case 'd':
if (util::streq_l(":metho", name, 6)) {
return HD__METHOD;
}
break;
case 'e':
if (util::streq_l(":schem", name, 6)) {
return HD__SCHEME;
}
if (util::streq_l("upgrad", name, 6)) {
return HD_UPGRADE;
}
break;
case 'r':
if (util::streq_l("traile", name, 6)) {
return HD_TRAILER;
}
break;
case 's':
if (util::streq_l(":statu", name, 6)) {
return HD__STATUS;
}
break;
}
break;
case 8:
switch (name[7]) {
case 'n':
if (util::streq_l("locatio", name, 7)) {
return HD_LOCATION;
}
break;
case 'y':
if (util::streq_l("priorit", name, 7)) {
return HD_PRIORITY;
}
break;
}
break;
case 9:
switch (name[8]) {
case 'd':
if (util::streq_l("forwarde", name, 8)) {
return HD_FORWARDED;
}
break;
case 'l':
if (util::streq_l(":protoco", name, 8)) {
return HD__PROTOCOL;
}
break;
}
break;
case 10:
switch (name[9]) {
case 'a':
if (util::streq_l("early-dat", name, 9)) {
return HD_EARLY_DATA;
}
break;
case 'e':
if (util::streq_l("keep-aliv", name, 9)) {
return HD_KEEP_ALIVE;
}
break;
case 'n':
if (util::streq_l("connectio", name, 9)) {
return HD_CONNECTION;
}
break;
case 't':
if (util::streq_l("user-agen", name, 9)) {
return HD_USER_AGENT;
}
break;
case 'y':
if (util::streq_l(":authorit", name, 9)) {
return HD__AUTHORITY;
}
break;
}
break;
case 12:
switch (name[11]) {
case 'e':
if (util::streq_l("content-typ", name, 11)) {
return HD_CONTENT_TYPE;
}
break;
}
break;
case 13:
switch (name[12]) {
case 'l':
if (util::streq_l("cache-contro", name, 12)) {
return HD_CACHE_CONTROL;
}
break;
}
break;
case 14:
switch (name[13]) {
case 'h':
if (util::streq_l("content-lengt", name, 13)) {
return HD_CONTENT_LENGTH;
}
break;
case 's':
if (util::streq_l("http2-setting", name, 13)) {
return HD_HTTP2_SETTINGS;
}
break;
}
break;
case 15:
switch (name[14]) {
case 'e':
if (util::streq_l("accept-languag", name, 14)) {
return HD_ACCEPT_LANGUAGE;
}
break;
case 'g':
if (util::streq_l("accept-encodin", name, 14)) {
return HD_ACCEPT_ENCODING;
}
break;
case 'r':
if (util::streq_l("x-forwarded-fo", name, 14)) {
return HD_X_FORWARDED_FOR;
}
break;
}
break;
case 16:
switch (name[15]) {
case 'n':
if (util::streq_l("proxy-connectio", name, 15)) {
return HD_PROXY_CONNECTION;
}
break;
}
break;
case 17:
switch (name[16]) {
case 'e':
if (util::streq_l("if-modified-sinc", name, 16)) {
return HD_IF_MODIFIED_SINCE;
}
break;
case 'g':
if (util::streq_l("transfer-encodin", name, 16)) {
return HD_TRANSFER_ENCODING;
}
break;
case 'o':
if (util::streq_l("x-forwarded-prot", name, 16)) {
return HD_X_FORWARDED_PROTO;
}
break;
case 'y':
if (util::streq_l("sec-websocket-ke", name, 16)) {
return HD_SEC_WEBSOCKET_KEY;
}
break;
}
break;
case 20:
switch (name[19]) {
case 't':
if (util::streq_l("sec-websocket-accep", name, 19)) {
return HD_SEC_WEBSOCKET_ACCEPT;
}
break;
}
break;
}
return -1;
}
void init_hdidx(HeaderIndex &hdidx) {
std::fill(std::begin(hdidx), std::end(hdidx), -1);
}
void index_header(HeaderIndex &hdidx, int32_t token, size_t idx) {
if (token == -1) {
return;
}
assert(token < HD_MAXIDX);
hdidx[token] = idx;
}
const Headers::value_type *get_header(const HeaderIndex &hdidx, int32_t token,
const Headers &nva) {
auto i = hdidx[token];
if (i == -1) {
return nullptr;
}
return &nva[i];
}