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-rw-r--r--src/http2.cc1962
1 files changed, 1962 insertions, 0 deletions
diff --git a/src/http2.cc b/src/http2.cc
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+++ b/src/http2.cc
@@ -0,0 +1,1962 @@
+/*
+ * 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;
+ }
+ 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];
+}
+
+Headers::value_type *get_header(const HeaderIndex &hdidx, int32_t token,
+ Headers &nva) {
+ auto i = hdidx[token];
+ if (i == -1) {
+ return nullptr;
+ }
+ return &nva[i];
+}
+
+namespace {
+template <typename InputIt> InputIt skip_lws(InputIt first, InputIt last) {
+ for (; first != last; ++first) {
+ switch (*first) {
+ case ' ':
+ case '\t':
+ continue;
+ default:
+ return first;
+ }
+ }
+ return first;
+}
+} // namespace
+
+namespace {
+template <typename InputIt>
+InputIt skip_to_next_field(InputIt first, InputIt last) {
+ for (; first != last; ++first) {
+ switch (*first) {
+ case ' ':
+ case '\t':
+ case ',':
+ continue;
+ default:
+ return first;
+ }
+ }
+ return first;
+}
+} // namespace
+
+namespace {
+// Skip to the right dquote ('"'), handling backslash escapes.
+// Returns |last| if input is not terminated with '"'.
+template <typename InputIt>
+InputIt skip_to_right_dquote(InputIt first, InputIt last) {
+ for (; first != last;) {
+ switch (*first) {
+ case '"':
+ return first;
+ case '\\':
+ ++first;
+ if (first == last) {
+ return first;
+ }
+ break;
+ }
+ ++first;
+ }
+ return first;
+}
+} // namespace
+
+namespace {
+// Returns true if link-param does not match pattern |pat| of length
+// |patlen| or it has empty value (""). |pat| should be parmname
+// followed by "=".
+bool check_link_param_empty(const char *first, const char *last,
+ const char *pat, size_t patlen) {
+ if (first + patlen <= last) {
+ if (std::equal(pat, pat + patlen, first, util::CaseCmp())) {
+ // we only accept URI if pat is followd by "" (e.g.,
+ // loadpolicy="") here.
+ if (first + patlen + 2 <= last) {
+ if (*(first + patlen) != '"' || *(first + patlen + 1) != '"') {
+ return false;
+ }
+ } else {
+ // here we got invalid production (anchor=") or anchor=?
+ return false;
+ }
+ }
+ }
+ return true;
+}
+} // namespace
+
+namespace {
+// Returns true if link-param consists of only parmname, and it
+// matches string [pat, pat + patlen).
+bool check_link_param_without_value(const char *first, const char *last,
+ const char *pat, size_t patlen) {
+ if (first + patlen > last) {
+ return false;
+ }
+
+ if (first + patlen == last) {
+ return std::equal(pat, pat + patlen, first, util::CaseCmp());
+ }
+
+ switch (*(first + patlen)) {
+ case ';':
+ case ',':
+ return std::equal(pat, pat + patlen, first, util::CaseCmp());
+ }
+
+ return false;
+}
+} // namespace
+
+namespace {
+std::pair<LinkHeader, const char *>
+parse_next_link_header_once(const char *first, const char *last) {
+ first = skip_to_next_field(first, last);
+ if (first == last || *first != '<') {
+ return {{StringRef{}}, last};
+ }
+ auto url_first = ++first;
+ first = std::find(first, last, '>');
+ if (first == last) {
+ return {{StringRef{}}, first};
+ }
+ auto url_last = first++;
+ if (first == last) {
+ return {{StringRef{}}, first};
+ }
+ // we expect ';' or ',' here
+ switch (*first) {
+ case ',':
+ return {{StringRef{}}, ++first};
+ case ';':
+ ++first;
+ break;
+ default:
+ return {{StringRef{}}, last};
+ }
+
+ auto ok = false;
+ auto ign = false;
+ for (;;) {
+ first = skip_lws(first, last);
+ if (first == last) {
+ return {{StringRef{}}, first};
+ }
+ // we expect link-param
+
+ if (!ign) {
+ if (!ok) {
+ // rel can take several relations using quoted form.
+ static constexpr char PLP[] = "rel=\"";
+ static constexpr size_t PLPLEN = str_size(PLP);
+
+ static constexpr char PLT[] = "preload";
+ static constexpr size_t PLTLEN = str_size(PLT);
+ if (first + PLPLEN < last && *(first + PLPLEN - 1) == '"' &&
+ std::equal(PLP, PLP + PLPLEN, first, util::CaseCmp())) {
+ // we have to search preload in whitespace separated list:
+ // rel="preload something http://example.org/foo"
+ first += PLPLEN;
+ auto start = first;
+ for (; first != last;) {
+ if (*first != ' ' && *first != '"') {
+ ++first;
+ continue;
+ }
+
+ if (start == first) {
+ return {{StringRef{}}, last};
+ }
+
+ if (!ok && start + PLTLEN == first &&
+ std::equal(PLT, PLT + PLTLEN, start, util::CaseCmp())) {
+ ok = true;
+ }
+
+ if (*first == '"') {
+ break;
+ }
+ first = skip_lws(first, last);
+ start = first;
+ }
+ if (first == last) {
+ return {{StringRef{}}, last};
+ }
+ assert(*first == '"');
+ ++first;
+ if (first == last || *first == ',') {
+ goto almost_done;
+ }
+ if (*first == ';') {
+ ++first;
+ // parse next link-param
+ continue;
+ }
+ return {{StringRef{}}, last};
+ }
+ }
+ // we are only interested in rel=preload parameter. Others are
+ // simply skipped.
+ static constexpr char PL[] = "rel=preload";
+ static constexpr size_t PLLEN = str_size(PL);
+ if (first + PLLEN == last) {
+ if (std::equal(PL, PL + PLLEN, first, util::CaseCmp())) {
+ // ok = true;
+ // this is the end of sequence
+ return {{{url_first, url_last}}, last};
+ }
+ } else if (first + PLLEN + 1 <= last) {
+ switch (*(first + PLLEN)) {
+ case ',':
+ if (!std::equal(PL, PL + PLLEN, first, util::CaseCmp())) {
+ break;
+ }
+ // ok = true;
+ // skip including ','
+ first += PLLEN + 1;
+ return {{{url_first, url_last}}, first};
+ case ';':
+ if (!std::equal(PL, PL + PLLEN, first, util::CaseCmp())) {
+ break;
+ }
+ ok = true;
+ // skip including ';'
+ first += PLLEN + 1;
+ // continue parse next link-param
+ continue;
+ }
+ }
+ // we have to reject URI if we have nonempty anchor parameter.
+ static constexpr char ANCHOR[] = "anchor=";
+ static constexpr size_t ANCHORLEN = str_size(ANCHOR);
+ if (!ign && !check_link_param_empty(first, last, ANCHOR, ANCHORLEN)) {
+ ign = true;
+ }
+
+ // reject URI if we have non-empty loadpolicy. This could be
+ // tightened up to just pick up "next" or "insert".
+ static constexpr char LOADPOLICY[] = "loadpolicy=";
+ static constexpr size_t LOADPOLICYLEN = str_size(LOADPOLICY);
+ if (!ign &&
+ !check_link_param_empty(first, last, LOADPOLICY, LOADPOLICYLEN)) {
+ ign = true;
+ }
+
+ // reject URI if we have nopush attribute.
+ static constexpr char NOPUSH[] = "nopush";
+ static constexpr size_t NOPUSHLEN = str_size(NOPUSH);
+ if (!ign &&
+ check_link_param_without_value(first, last, NOPUSH, NOPUSHLEN)) {
+ ign = true;
+ }
+ }
+
+ auto param_first = first;
+ for (; first != last;) {
+ if (util::in_attr_char(*first)) {
+ ++first;
+ continue;
+ }
+ // '*' is only allowed at the end of parameter name and must be
+ // followed by '='
+ if (last - first >= 2 && first != param_first) {
+ if (*first == '*' && *(first + 1) == '=') {
+ ++first;
+ break;
+ }
+ }
+ if (*first == '=' || *first == ';' || *first == ',') {
+ break;
+ }
+ return {{StringRef{}}, last};
+ }
+ if (param_first == first) {
+ // empty parmname
+ return {{StringRef{}}, last};
+ }
+ // link-param without value is acceptable (see link-extension) if
+ // it is not followed by '='
+ if (first == last || *first == ',') {
+ goto almost_done;
+ }
+ if (*first == ';') {
+ ++first;
+ // parse next link-param
+ continue;
+ }
+ // now parsing link-param value
+ assert(*first == '=');
+ ++first;
+ if (first == last) {
+ // empty value is not acceptable
+ return {{StringRef{}}, first};
+ }
+ if (*first == '"') {
+ // quoted-string
+ first = skip_to_right_dquote(first + 1, last);
+ if (first == last) {
+ return {{StringRef{}}, first};
+ }
+ ++first;
+ if (first == last || *first == ',') {
+ goto almost_done;
+ }
+ if (*first == ';') {
+ ++first;
+ // parse next link-param
+ continue;
+ }
+ return {{StringRef{}}, last};
+ }
+ // not quoted-string, skip to next ',' or ';'
+ if (*first == ',' || *first == ';') {
+ // empty value
+ return {{StringRef{}}, last};
+ }
+ for (; first != last; ++first) {
+ if (*first == ',' || *first == ';') {
+ break;
+ }
+ }
+ if (first == last || *first == ',') {
+ goto almost_done;
+ }
+ assert(*first == ';');
+ ++first;
+ // parse next link-param
+ }
+
+almost_done:
+ assert(first == last || *first == ',');
+
+ if (first != last) {
+ ++first;
+ }
+ if (ok && !ign) {
+ return {{{url_first, url_last}}, first};
+ }
+ return {{StringRef{}}, first};
+}
+} // namespace
+
+std::vector<LinkHeader> parse_link_header(const StringRef &src) {
+ std::vector<LinkHeader> res;
+ for (auto first = std::begin(src); first != std::end(src);) {
+ auto rv = parse_next_link_header_once(first, std::end(src));
+ first = rv.second;
+ auto &link = rv.first;
+ if (!link.uri.empty()) {
+ res.push_back(link);
+ }
+ }
+ return res;
+}
+
+std::string path_join(const StringRef &base_path, const StringRef &base_query,
+ const StringRef &rel_path, const StringRef &rel_query) {
+ BlockAllocator balloc(1024, 1024);
+
+ return path_join(balloc, base_path, base_query, rel_path, rel_query).str();
+}
+
+bool expect_response_body(int status_code) {
+ return status_code == 101 ||
+ (status_code / 100 != 1 && status_code != 304 && status_code != 204);
+}
+
+bool expect_response_body(const std::string &method, int status_code) {
+ return method != "HEAD" && expect_response_body(status_code);
+}
+
+bool expect_response_body(int method_token, int status_code) {
+ return method_token != HTTP_HEAD && expect_response_body(status_code);
+}
+
+int lookup_method_token(const StringRef &name) {
+ return lookup_method_token(name.byte(), name.size());
+}
+
+// This function was generated by genmethodfunc.py.
+int lookup_method_token(const uint8_t *name, size_t namelen) {
+ switch (namelen) {
+ case 3:
+ switch (name[2]) {
+ case 'L':
+ if (util::streq_l("AC", name, 2)) {
+ return HTTP_ACL;
+ }
+ break;
+ case 'T':
+ if (util::streq_l("GE", name, 2)) {
+ return HTTP_GET;
+ }
+ if (util::streq_l("PU", name, 2)) {
+ return HTTP_PUT;
+ }
+ break;
+ }
+ break;
+ case 4:
+ switch (name[3]) {
+ case 'D':
+ if (util::streq_l("BIN", name, 3)) {
+ return HTTP_BIND;
+ }
+ if (util::streq_l("HEA", name, 3)) {
+ return HTTP_HEAD;
+ }
+ break;
+ case 'E':
+ if (util::streq_l("MOV", name, 3)) {
+ return HTTP_MOVE;
+ }
+ break;
+ case 'K':
+ if (util::streq_l("LIN", name, 3)) {
+ return HTTP_LINK;
+ }
+ if (util::streq_l("LOC", name, 3)) {
+ return HTTP_LOCK;
+ }
+ break;
+ case 'T':
+ if (util::streq_l("POS", name, 3)) {
+ return HTTP_POST;
+ }
+ break;
+ case 'Y':
+ if (util::streq_l("COP", name, 3)) {
+ return HTTP_COPY;
+ }
+ break;
+ }
+ break;
+ case 5:
+ switch (name[4]) {
+ case 'E':
+ if (util::streq_l("MERG", name, 4)) {
+ return HTTP_MERGE;
+ }
+ if (util::streq_l("PURG", name, 4)) {
+ return HTTP_PURGE;
+ }
+ if (util::streq_l("TRAC", name, 4)) {
+ return HTTP_TRACE;
+ }
+ break;
+ case 'H':
+ if (util::streq_l("PATC", name, 4)) {
+ return HTTP_PATCH;
+ }
+ break;
+ case 'L':
+ if (util::streq_l("MKCO", name, 4)) {
+ return HTTP_MKCOL;
+ }
+ break;
+ }
+ break;
+ case 6:
+ switch (name[5]) {
+ case 'D':
+ if (util::streq_l("REBIN", name, 5)) {
+ return HTTP_REBIND;
+ }
+ if (util::streq_l("UNBIN", name, 5)) {
+ return HTTP_UNBIND;
+ }
+ break;
+ case 'E':
+ if (util::streq_l("DELET", name, 5)) {
+ return HTTP_DELETE;
+ }
+ if (util::streq_l("SOURC", name, 5)) {
+ return HTTP_SOURCE;
+ }
+ break;
+ case 'H':
+ if (util::streq_l("SEARC", name, 5)) {
+ return HTTP_SEARCH;
+ }
+ break;
+ case 'K':
+ if (util::streq_l("UNLIN", name, 5)) {
+ return HTTP_UNLINK;
+ }
+ if (util::streq_l("UNLOC", name, 5)) {
+ return HTTP_UNLOCK;
+ }
+ break;
+ case 'T':
+ if (util::streq_l("REPOR", name, 5)) {
+ return HTTP_REPORT;
+ }
+ break;
+ case 'Y':
+ if (util::streq_l("NOTIF", name, 5)) {
+ return HTTP_NOTIFY;
+ }
+ break;
+ }
+ break;
+ case 7:
+ switch (name[6]) {
+ case 'H':
+ if (util::streq_l("MSEARC", name, 6)) {
+ return HTTP_MSEARCH;
+ }
+ break;
+ case 'S':
+ if (util::streq_l("OPTION", name, 6)) {
+ return HTTP_OPTIONS;
+ }
+ break;
+ case 'T':
+ if (util::streq_l("CONNEC", name, 6)) {
+ return HTTP_CONNECT;
+ }
+ break;
+ }
+ break;
+ case 8:
+ switch (name[7]) {
+ case 'D':
+ if (util::streq_l("PROPFIN", name, 7)) {
+ return HTTP_PROPFIND;
+ }
+ break;
+ case 'T':
+ if (util::streq_l("CHECKOU", name, 7)) {
+ return HTTP_CHECKOUT;
+ }
+ break;
+ }
+ break;
+ case 9:
+ switch (name[8]) {
+ case 'E':
+ if (util::streq_l("SUBSCRIB", name, 8)) {
+ return HTTP_SUBSCRIBE;
+ }
+ break;
+ case 'H':
+ if (util::streq_l("PROPPATC", name, 8)) {
+ return HTTP_PROPPATCH;
+ }
+ break;
+ }
+ break;
+ case 10:
+ switch (name[9]) {
+ case 'R':
+ if (util::streq_l("MKCALENDA", name, 9)) {
+ return HTTP_MKCALENDAR;
+ }
+ break;
+ case 'Y':
+ if (util::streq_l("MKACTIVIT", name, 9)) {
+ return HTTP_MKACTIVITY;
+ }
+ break;
+ }
+ break;
+ case 11:
+ switch (name[10]) {
+ case 'E':
+ if (util::streq_l("UNSUBSCRIB", name, 10)) {
+ return HTTP_UNSUBSCRIBE;
+ }
+ break;
+ }
+ break;
+ }
+ return -1;
+}
+
+StringRef to_method_string(int method_token) {
+ // we happened to use same value for method with llhttp.
+ return StringRef{
+ llhttp_method_name(static_cast<llhttp_method>(method_token))};
+}
+
+StringRef get_pure_path_component(const StringRef &uri) {
+ int rv;
+
+ http_parser_url u{};
+ rv = http_parser_parse_url(uri.c_str(), uri.size(), 0, &u);
+ if (rv != 0) {
+ return StringRef{};
+ }
+
+ if (u.field_set & (1 << UF_PATH)) {
+ auto &f = u.field_data[UF_PATH];
+ return StringRef{uri.c_str() + f.off, f.len};
+ }
+
+ return StringRef::from_lit("/");
+}
+
+int construct_push_component(BlockAllocator &balloc, StringRef &scheme,
+ StringRef &authority, StringRef &path,
+ const StringRef &base, const StringRef &uri) {
+ int rv;
+ StringRef rel, relq;
+
+ if (uri.size() == 0) {
+ return -1;
+ }
+
+ http_parser_url u{};
+
+ rv = http_parser_parse_url(uri.c_str(), uri.size(), 0, &u);
+
+ if (rv != 0) {
+ if (uri[0] == '/') {
+ return -1;
+ }
+
+ // treat link_url as relative URI.
+ auto end = std::find(std::begin(uri), std::end(uri), '#');
+ auto q = std::find(std::begin(uri), end, '?');
+
+ rel = StringRef{std::begin(uri), q};
+ if (q != end) {
+ relq = StringRef{q + 1, std::end(uri)};
+ }
+ } else {
+ if (u.field_set & (1 << UF_SCHEMA)) {
+ scheme = util::get_uri_field(uri.c_str(), u, UF_SCHEMA);
+ }
+
+ if (u.field_set & (1 << UF_HOST)) {
+ auto auth = util::get_uri_field(uri.c_str(), u, UF_HOST);
+ auto len = auth.size();
+ auto port_exists = u.field_set & (1 << UF_PORT);
+ if (port_exists) {
+ len += 1 + str_size("65535");
+ }
+ auto iov = make_byte_ref(balloc, len + 1);
+ auto p = iov.base;
+ p = std::copy(std::begin(auth), std::end(auth), p);
+ if (port_exists) {
+ *p++ = ':';
+ p = util::utos(p, u.port);
+ }
+ *p = '\0';
+
+ authority = StringRef{iov.base, p};
+ }
+
+ if (u.field_set & (1 << UF_PATH)) {
+ auto &f = u.field_data[UF_PATH];
+ rel = StringRef{uri.c_str() + f.off, f.len};
+ } else {
+ rel = StringRef::from_lit("/");
+ }
+
+ if (u.field_set & (1 << UF_QUERY)) {
+ auto &f = u.field_data[UF_QUERY];
+ relq = StringRef{uri.c_str() + f.off, f.len};
+ }
+ }
+
+ path = http2::path_join(balloc, base, StringRef{}, rel, relq);
+
+ return 0;
+}
+
+namespace {
+template <typename InputIt> InputIt eat_file(InputIt first, InputIt last) {
+ if (first == last) {
+ *first++ = '/';
+ return first;
+ }
+
+ if (*(last - 1) == '/') {
+ return last;
+ }
+
+ auto p = last;
+ for (; p != first && *(p - 1) != '/'; --p)
+ ;
+ if (p == first) {
+ // this should not happened in normal case, where we expect path
+ // starts with '/'
+ *first++ = '/';
+ return first;
+ }
+
+ return p;
+}
+} // namespace
+
+namespace {
+template <typename InputIt> InputIt eat_dir(InputIt first, InputIt last) {
+ auto p = eat_file(first, last);
+
+ --p;
+
+ assert(*p == '/');
+
+ return eat_file(first, p);
+}
+} // namespace
+
+StringRef path_join(BlockAllocator &balloc, const StringRef &base_path,
+ const StringRef &base_query, const StringRef &rel_path,
+ const StringRef &rel_query) {
+ auto res = make_byte_ref(
+ balloc, std::max(static_cast<size_t>(1), base_path.size()) +
+ rel_path.size() + 1 +
+ std::max(base_query.size(), rel_query.size()) + 1);
+ auto p = res.base;
+
+ if (rel_path.empty()) {
+ if (base_path.empty()) {
+ *p++ = '/';
+ } else {
+ p = std::copy(std::begin(base_path), std::end(base_path), p);
+ }
+ if (rel_query.empty()) {
+ if (!base_query.empty()) {
+ *p++ = '?';
+ p = std::copy(std::begin(base_query), std::end(base_query), p);
+ }
+ *p = '\0';
+ return StringRef{res.base, p};
+ }
+ *p++ = '?';
+ p = std::copy(std::begin(rel_query), std::end(rel_query), p);
+ *p = '\0';
+ return StringRef{res.base, p};
+ }
+
+ auto first = std::begin(rel_path);
+ auto last = std::end(rel_path);
+
+ if (rel_path[0] == '/') {
+ *p++ = '/';
+ ++first;
+ for (; first != last && *first == '/'; ++first)
+ ;
+ } else if (base_path.empty()) {
+ *p++ = '/';
+ } else {
+ p = std::copy(std::begin(base_path), std::end(base_path), p);
+ }
+
+ for (; first != last;) {
+ if (*first == '.') {
+ if (first + 1 == last) {
+ if (*(p - 1) != '/') {
+ p = eat_file(res.base, p);
+ }
+ break;
+ }
+ if (*(first + 1) == '/') {
+ if (*(p - 1) != '/') {
+ p = eat_file(res.base, p);
+ }
+ first += 2;
+ continue;
+ }
+ if (*(first + 1) == '.') {
+ if (first + 2 == last) {
+ p = eat_dir(res.base, p);
+ break;
+ }
+ if (*(first + 2) == '/') {
+ p = eat_dir(res.base, p);
+ first += 3;
+ continue;
+ }
+ }
+ }
+ if (*(p - 1) != '/') {
+ p = eat_file(res.base, p);
+ }
+ auto slash = std::find(first, last, '/');
+ if (slash == last) {
+ p = std::copy(first, last, p);
+ break;
+ }
+ p = std::copy(first, slash + 1, p);
+ first = slash + 1;
+ for (; first != last && *first == '/'; ++first)
+ ;
+ }
+ if (!rel_query.empty()) {
+ *p++ = '?';
+ p = std::copy(std::begin(rel_query), std::end(rel_query), p);
+ }
+ *p = '\0';
+ return StringRef{res.base, p};
+}
+
+StringRef normalize_path(BlockAllocator &balloc, const StringRef &path,
+ const StringRef &query) {
+ // First, decode %XX for unreserved characters, then do
+ // http2::path_join
+
+ // We won't find %XX if length is less than 3.
+ if (path.size() < 3 ||
+ std::find(std::begin(path), std::end(path), '%') == std::end(path)) {
+ return path_join(balloc, StringRef{}, StringRef{}, path, query);
+ }
+
+ // includes last terminal NULL.
+ auto result = make_byte_ref(balloc, path.size() + 1);
+ auto p = result.base;
+
+ auto it = std::begin(path);
+ for (; it + 2 < std::end(path);) {
+ if (*it == '%') {
+ if (util::is_hex_digit(*(it + 1)) && util::is_hex_digit(*(it + 2))) {
+ auto c =
+ (util::hex_to_uint(*(it + 1)) << 4) + util::hex_to_uint(*(it + 2));
+ if (util::in_rfc3986_unreserved_chars(c)) {
+ *p++ = c;
+
+ it += 3;
+
+ continue;
+ }
+ *p++ = '%';
+ *p++ = util::upcase(*(it + 1));
+ *p++ = util::upcase(*(it + 2));
+
+ it += 3;
+
+ continue;
+ }
+ }
+ *p++ = *it++;
+ }
+
+ p = std::copy(it, std::end(path), p);
+ *p = '\0';
+
+ return path_join(balloc, StringRef{}, StringRef{}, StringRef{result.base, p},
+ query);
+}
+
+StringRef normalize_path_colon(BlockAllocator &balloc, const StringRef &path,
+ const StringRef &query) {
+ // First, decode %XX for unreserved characters and ':', then do
+ // http2::path_join
+
+ // We won't find %XX if length is less than 3.
+ if (path.size() < 3 ||
+ std::find(std::begin(path), std::end(path), '%') == std::end(path)) {
+ return path_join(balloc, StringRef{}, StringRef{}, path, query);
+ }
+
+ // includes last terminal NULL.
+ auto result = make_byte_ref(balloc, path.size() + 1);
+ auto p = result.base;
+
+ auto it = std::begin(path);
+ for (; it + 2 < std::end(path);) {
+ if (*it == '%') {
+ if (util::is_hex_digit(*(it + 1)) && util::is_hex_digit(*(it + 2))) {
+ auto c =
+ (util::hex_to_uint(*(it + 1)) << 4) + util::hex_to_uint(*(it + 2));
+ if (util::in_rfc3986_unreserved_chars(c) || c == ':') {
+ *p++ = c;
+
+ it += 3;
+
+ continue;
+ }
+ *p++ = '%';
+ *p++ = util::upcase(*(it + 1));
+ *p++ = util::upcase(*(it + 2));
+
+ it += 3;
+
+ continue;
+ }
+ }
+ *p++ = *it++;
+ }
+
+ p = std::copy(it, std::end(path), p);
+ *p = '\0';
+
+ return path_join(balloc, StringRef{}, StringRef{}, StringRef{result.base, p},
+ query);
+}
+
+std::string normalize_path(const StringRef &path, const StringRef &query) {
+ BlockAllocator balloc(1024, 1024);
+
+ return normalize_path(balloc, path, query).str();
+}
+
+StringRef rewrite_clean_path(BlockAllocator &balloc, const StringRef &src) {
+ if (src.empty() || src[0] != '/') {
+ return src;
+ }
+ // probably, not necessary most of the case, but just in case.
+ auto fragment = std::find(std::begin(src), std::end(src), '#');
+ auto raw_query = std::find(std::begin(src), fragment, '?');
+ auto query = raw_query;
+ if (query != fragment) {
+ ++query;
+ }
+ return normalize_path(balloc, StringRef{std::begin(src), raw_query},
+ StringRef{query, fragment});
+}
+
+StringRef copy_lower(BlockAllocator &balloc, const StringRef &src) {
+ auto iov = make_byte_ref(balloc, src.size() + 1);
+ auto p = iov.base;
+ p = std::copy(std::begin(src), std::end(src), p);
+ *p = '\0';
+ util::inp_strlower(iov.base, p);
+ return StringRef{iov.base, p};
+}
+
+bool contains_trailers(const StringRef &s) {
+ constexpr auto trailers = StringRef::from_lit("trailers");
+
+ for (auto p = std::begin(s), end = std::end(s);; ++p) {
+ p = std::find_if(p, end, [](char c) { return c != ' ' && c != '\t'; });
+ if (p == end || static_cast<size_t>(end - p) < trailers.size()) {
+ return false;
+ }
+ if (util::strieq(trailers, StringRef{p, p + trailers.size()})) {
+ // Make sure that there is no character other than white spaces
+ // before next "," or end of string.
+ p = std::find_if(p + trailers.size(), end,
+ [](char c) { return c != ' ' && c != '\t'; });
+ if (p == end || *p == ',') {
+ return true;
+ }
+ }
+ // Skip to next ",".
+ p = std::find_if(p, end, [](char c) { return c == ','; });
+ if (p == end) {
+ return false;
+ }
+ }
+}
+
+StringRef make_websocket_accept_token(uint8_t *dest, const StringRef &key) {
+ static constexpr uint8_t magic[] = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+ std::array<uint8_t, base64::encode_length(16) + str_size(magic)> s;
+ auto p = std::copy(std::begin(key), std::end(key), std::begin(s));
+ std::copy_n(magic, str_size(magic), p);
+
+ std::array<uint8_t, 20> h;
+ if (util::sha1(h.data(), StringRef{std::begin(s), std::end(s)}) != 0) {
+ return StringRef{};
+ }
+
+ auto end = base64::encode(std::begin(h), std::end(h), dest);
+ return StringRef{dest, end};
+}
+
+bool legacy_http1(int major, int minor) {
+ return major <= 0 || (major == 1 && minor == 0);
+}
+
+} // namespace http2
+
+} // namespace nghttp2
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-10 20:57:53 +0000