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-rw-r--r--src/contrib/url-parser/LICENSE1
-rw-r--r--src/contrib/url-parser/README.md14
-rw-r--r--src/contrib/url-parser/url_parser.c635
-rw-r--r--src/contrib/url-parser/url_parser.h64
4 files changed, 714 insertions, 0 deletions
diff --git a/src/contrib/url-parser/LICENSE b/src/contrib/url-parser/LICENSE
new file mode 100644
index 0000000..0161703
--- /dev/null
+++ b/src/contrib/url-parser/LICENSE
@@ -0,0 +1 @@
+../licenses/MIT \ No newline at end of file
diff --git a/src/contrib/url-parser/README.md b/src/contrib/url-parser/README.md
new file mode 100644
index 0000000..c3b1919
--- /dev/null
+++ b/src/contrib/url-parser/README.md
@@ -0,0 +1,14 @@
+url-parser
+==========
+
+This is Joyent's [URL parser][original-source] from their
+[http-parser][joyent-http-parser] library.
+
+## LICENSE
+
+This derivative is licensed under the same terms as NGINX and copyright Joyent,
+Inc. and other Node contributors as outlined in their [LICENSE][].
+
+[original-source]: https://github.com/joyent/http-parser/blob/e01811e7f4894d7f0f7f4bd8492cccec6f6b4038/http_parser.c#L2343
+[joyent-http-parser]: https://github.com/joyent/http-parser
+[LICENSE]: https://github.com/joyent/http-parser/blob/master/LICENSE-MIT
diff --git a/src/contrib/url-parser/url_parser.c b/src/contrib/url-parser/url_parser.c
new file mode 100644
index 0000000..5084740
--- /dev/null
+++ b/src/contrib/url-parser/url_parser.c
@@ -0,0 +1,635 @@
+/* Based on src/http/ngx_http_parse.c from NGINX copyright Igor Sysoev
+ *
+ * Additional changes are licensed under the same terms as NGINX and
+ * copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * 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.
+ */
+
+/**
+ * This is the http_parser_parse_url function extracted from joyent's
+ * http-parser library.
+ */
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "url_parser.h"
+
+/* Macros for character classes; depends on strict-mode */
+#define CR '\r'
+#define LF '\n'
+#define LOWER(c) (unsigned char)(c | 0x20)
+#define IS_ALPHA(c) (LOWER(c) >= 'a' && LOWER(c) <= 'z')
+#define IS_NUM(c) ((c) >= '0' && (c) <= '9')
+#define IS_ALPHANUM(c) (IS_ALPHA(c) || IS_NUM(c))
+#define IS_HEX(c) (IS_NUM(c) || (LOWER(c) >= 'a' && LOWER(c) <= 'f'))
+#define IS_MARK(c) ((c) == '-' || (c) == '_' || (c) == '.' || \
+ (c) == '!' || (c) == '~' || (c) == '*' || (c) == '\'' || (c) == '(' || \
+ (c) == ')')
+#define IS_USERINFO_CHAR(c) (IS_ALPHANUM(c) || IS_MARK(c) || (c) == '%' || \
+ (c) == ';' || (c) == ':' || (c) == '&' || (c) == '=' || (c) == '+' || \
+ (c) == '$' || (c) == ',')
+
+#define STRICT_TOKEN(c) (tokens[(unsigned char)c])
+
+#ifndef BIT_AT
+# define BIT_AT(a, i) \
+ (!!((unsigned int) (a)[(unsigned int) (i) >> 3] & \
+ (1 << ((unsigned int) (i) & 7))))
+#endif
+
+#if HTTP_PARSER_STRICT
+# define T(v) 0
+#else
+# define T(v) v
+#endif
+
+static const uint8_t normal_url_char[32] = {
+/* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */
+ 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,
+/* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */
+ 0 | T(2) | 0 | 0 | T(16) | 0 | 0 | 0,
+/* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */
+ 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,
+/* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */
+ 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0,
+/* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */
+ 0 | 2 | 4 | 0 | 16 | 32 | 64 | 128,
+/* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0,
+/* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128,
+/* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */
+ 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, };
+
+#if HTTP_PARSER_STRICT
+#define TOKEN(c) (tokens[(unsigned char)c])
+#define IS_URL_CHAR(c) (BIT_AT(normal_url_char, (unsigned char)c))
+#define IS_HOST_CHAR(c) (IS_ALPHANUM(c) || (c) == '.' || (c) == '-')
+#else
+#define TOKEN(c) ((c == ' ') ? ' ' : tokens[(unsigned char)c])
+#define IS_URL_CHAR(c) \
+ (BIT_AT(normal_url_char, (unsigned char)c) || ((c) & 0x80))
+#define IS_HOST_CHAR(c) \
+ (IS_ALPHANUM(c) || (c) == '.' || (c) == '-' || (c) == '_')
+#endif
+
+
+
+enum state
+ { s_dead = 1 /* important that this is > 0 */
+
+ , s_start_req_or_res
+ , s_res_or_resp_H
+ , s_start_res
+ , s_res_H
+ , s_res_HT
+ , s_res_HTT
+ , s_res_HTTP
+ , s_res_first_http_major
+ , s_res_http_major
+ , s_res_first_http_minor
+ , s_res_http_minor
+ , s_res_first_status_code
+ , s_res_status_code
+ , s_res_status_start
+ , s_res_status
+ , s_res_line_almost_done
+
+ , s_start_req
+
+ , s_req_method
+ , s_req_spaces_before_url
+ , s_req_schema
+ , s_req_schema_slash
+ , s_req_schema_slash_slash
+ , s_req_server_start
+ , s_req_server
+ , s_req_server_with_at
+ , s_req_path
+ , s_req_query_string_start
+ , s_req_query_string
+ , s_req_fragment_start
+ , s_req_fragment
+ , s_req_http_start
+ , s_req_http_H
+ , s_req_http_HT
+ , s_req_http_HTT
+ , s_req_http_HTTP
+ , s_req_first_http_major
+ , s_req_http_major
+ , s_req_first_http_minor
+ , s_req_http_minor
+ , s_req_line_almost_done
+
+ , s_header_field_start
+ , s_header_field
+ , s_header_value_discard_ws
+ , s_header_value_discard_ws_almost_done
+ , s_header_value_discard_lws
+ , s_header_value_start
+ , s_header_value
+ , s_header_value_lws
+
+ , s_header_almost_done
+
+ , s_chunk_size_start
+ , s_chunk_size
+ , s_chunk_parameters
+ , s_chunk_size_almost_done
+
+ , s_headers_almost_done
+ , s_headers_done
+
+ /* Important: 's_headers_done' must be the last 'header' state. All
+ * states beyond this must be 'body' states. It is used for overflow
+ * checking. See the PARSING_HEADER() macro.
+ */
+
+ , s_chunk_data
+ , s_chunk_data_almost_done
+ , s_chunk_data_done
+
+ , s_body_identity
+ , s_body_identity_eof
+
+ , s_message_done
+ };
+
+
+enum http_host_state
+ {
+ s_http_host_dead = 1
+ , s_http_userinfo_start
+ , s_http_userinfo
+ , s_http_host_start
+ , s_http_host_v6_start
+ , s_http_host
+ , s_http_host_v6
+ , s_http_host_v6_end
+ , s_http_host_v6_zone_start
+ , s_http_host_v6_zone
+ , s_http_host_port_start
+ , s_http_host_port
+};
+
+/* Our URL parser.
+ *
+ * This is designed to be shared by http_parser_execute() for URL validation,
+ * hence it has a state transition + byte-for-byte interface. In addition, it
+ * is meant to be embedded in http_parser_parse_url(), which does the dirty
+ * work of turning state transitions URL components for its API.
+ *
+ * This function should only be invoked with non-space characters. It is
+ * assumed that the caller cares about (and can detect) the transition between
+ * URL and non-URL states by looking for these.
+ */
+static enum state
+parse_url_char(enum state s, const char ch)
+{
+ if (ch == ' ' || ch == '\r' || ch == '\n') {
+ return s_dead;
+ }
+
+#if HTTP_PARSER_STRICT
+ if (ch == '\t' || ch == '\f') {
+ return s_dead;
+ }
+#endif
+
+ switch (s) {
+ case s_req_spaces_before_url:
+ /* Proxied requests are followed by scheme of an absolute URI (alpha).
+ * All methods except CONNECT are followed by '/' or '*'.
+ */
+
+ if (ch == '/' || ch == '*') {
+ return s_req_path;
+ }
+
+ if (IS_ALPHA(ch)) {
+ return s_req_schema;
+ }
+
+ break;
+
+ case s_req_schema:
+ if (IS_ALPHA(ch)) {
+ return s;
+ }
+
+ if (ch == ':') {
+ return s_req_schema_slash;
+ }
+
+ break;
+
+ case s_req_schema_slash:
+ if (ch == '/') {
+ return s_req_schema_slash_slash;
+ }
+
+ break;
+
+ case s_req_schema_slash_slash:
+ if (ch == '/') {
+ return s_req_server_start;
+ }
+
+ break;
+
+ case s_req_server_with_at:
+ if (ch == '@') {
+ return s_dead;
+ }
+
+ /* FALLTHROUGH */
+ case s_req_server_start:
+ case s_req_server:
+ if (ch == '/') {
+ return s_req_path;
+ }
+
+ if (ch == '?') {
+ return s_req_query_string_start;
+ }
+
+ if (ch == '@') {
+ return s_req_server_with_at;
+ }
+
+ if (IS_USERINFO_CHAR(ch) || ch == '[' || ch == ']') {
+ return s_req_server;
+ }
+
+ break;
+
+ case s_req_path:
+ if (IS_URL_CHAR(ch)) {
+ return s;
+ }
+
+ switch (ch) {
+ case '?':
+ return s_req_query_string_start;
+
+ case '#':
+ return s_req_fragment_start;
+ }
+
+ break;
+
+ case s_req_query_string_start:
+ case s_req_query_string:
+ if (IS_URL_CHAR(ch)) {
+ return s_req_query_string;
+ }
+
+ switch (ch) {
+ case '?':
+ /* allow extra '?' in query string */
+ return s_req_query_string;
+
+ case '#':
+ return s_req_fragment_start;
+ }
+
+ break;
+
+ case s_req_fragment_start:
+ if (IS_URL_CHAR(ch)) {
+ return s_req_fragment;
+ }
+
+ switch (ch) {
+ case '?':
+ return s_req_fragment;
+
+ case '#':
+ return s;
+ }
+
+ break;
+
+ case s_req_fragment:
+ if (IS_URL_CHAR(ch)) {
+ return s;
+ }
+
+ switch (ch) {
+ case '?':
+ case '#':
+ return s;
+ }
+
+ break;
+
+ default:
+ break;
+ }
+
+ /* We should never fall out of the switch above unless there's an error */
+ return s_dead;
+}
+
+static enum http_host_state
+http_parse_host_char(enum http_host_state s, const char ch) {
+ switch(s) {
+ case s_http_userinfo:
+ case s_http_userinfo_start:
+ if (ch == '@') {
+ return s_http_host_start;
+ }
+
+ if (IS_USERINFO_CHAR(ch)) {
+ return s_http_userinfo;
+ }
+ break;
+
+ case s_http_host_start:
+ if (ch == '[') {
+ return s_http_host_v6_start;
+ }
+
+ if (IS_HOST_CHAR(ch)) {
+ return s_http_host;
+ }
+
+ break;
+
+ case s_http_host:
+ if (IS_HOST_CHAR(ch)) {
+ return s_http_host;
+ }
+
+ /* FALLTHROUGH */
+ case s_http_host_v6_end:
+ if (ch == ':') {
+ return s_http_host_port_start;
+ }
+
+ break;
+
+ case s_http_host_v6:
+ if (ch == ']') {
+ return s_http_host_v6_end;
+ }
+
+ /* FALLTHROUGH */
+ case s_http_host_v6_start:
+ if (IS_HEX(ch) || ch == ':' || ch == '.') {
+ return s_http_host_v6;
+ }
+
+ if (s == s_http_host_v6 && ch == '%') {
+ return s_http_host_v6_zone_start;
+ }
+ break;
+
+ case s_http_host_v6_zone:
+ if (ch == ']') {
+ return s_http_host_v6_end;
+ }
+
+ /* FALLTHROUGH */
+ case s_http_host_v6_zone_start:
+ /* RFC 6874 Zone ID consists of 1*( unreserved / pct-encoded) */
+ if (IS_ALPHANUM(ch) || ch == '%' || ch == '.' || ch == '-' || ch == '_' ||
+ ch == '~') {
+ return s_http_host_v6_zone;
+ }
+ break;
+
+ case s_http_host_port:
+ case s_http_host_port_start:
+ if (IS_NUM(ch)) {
+ return s_http_host_port;
+ }
+
+ break;
+
+ default:
+ break;
+ }
+ return s_http_host_dead;
+}
+
+static int
+http_parse_host(const char * buf, struct http_parser_url *u, int found_at) {
+ assert(u->field_set & (1 << UF_HOST));
+ enum http_host_state s;
+
+ const char *p;
+ size_t buflen = u->field_data[UF_HOST].off + u->field_data[UF_HOST].len;
+
+ u->field_data[UF_HOST].len = 0;
+
+ s = found_at ? s_http_userinfo_start : s_http_host_start;
+
+ for (p = buf + u->field_data[UF_HOST].off; p < buf + buflen; p++) {
+ enum http_host_state new_s = http_parse_host_char(s, *p);
+
+ if (new_s == s_http_host_dead) {
+ return 1;
+ }
+
+ switch(new_s) {
+ case s_http_host:
+ if (s != s_http_host) {
+ u->field_data[UF_HOST].off = p - buf;
+ }
+ u->field_data[UF_HOST].len++;
+ break;
+
+ case s_http_host_v6:
+ if (s != s_http_host_v6) {
+ u->field_data[UF_HOST].off = p - buf;
+ }
+ u->field_data[UF_HOST].len++;
+ break;
+
+ case s_http_host_v6_zone_start:
+ case s_http_host_v6_zone:
+ u->field_data[UF_HOST].len++;
+ break;
+
+ case s_http_host_port:
+ if (s != s_http_host_port) {
+ u->field_data[UF_PORT].off = p - buf;
+ u->field_data[UF_PORT].len = 0;
+ u->field_set |= (1 << UF_PORT);
+ }
+ u->field_data[UF_PORT].len++;
+ break;
+
+ case s_http_userinfo:
+ if (s != s_http_userinfo) {
+ u->field_data[UF_USERINFO].off = p - buf ;
+ u->field_data[UF_USERINFO].len = 0;
+ u->field_set |= (1 << UF_USERINFO);
+ }
+ u->field_data[UF_USERINFO].len++;
+ break;
+
+ default:
+ break;
+ }
+ s = new_s;
+ }
+
+ /* Make sure we don't end somewhere unexpected */
+ switch (s) {
+ case s_http_host_start:
+ case s_http_host_v6_start:
+ case s_http_host_v6:
+ case s_http_host_v6_zone_start:
+ case s_http_host_v6_zone:
+ case s_http_host_port_start:
+ case s_http_userinfo:
+ case s_http_userinfo_start:
+ return 1;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+
+int
+http_parser_parse_url(const char *buf, size_t buflen, int is_connect,
+ struct http_parser_url *u)
+{
+ enum state s;
+ const char *p;
+ enum http_parser_url_fields uf, old_uf;
+ int found_at = 0;
+
+ u->port = u->field_set = 0;
+ s = is_connect ? s_req_server_start : s_req_spaces_before_url;
+ old_uf = UF_MAX;
+
+ for (p = buf; p < buf + buflen; p++) {
+ s = parse_url_char(s, *p);
+
+ /* Figure out the next field that we're operating on */
+ switch (s) {
+ case s_dead:
+ return 1;
+
+ /* Skip delimiters */
+ case s_req_schema_slash:
+ case s_req_schema_slash_slash:
+ case s_req_server_start:
+ case s_req_query_string_start:
+ case s_req_fragment_start:
+ continue;
+
+ case s_req_schema:
+ uf = UF_SCHEMA;
+ break;
+
+ case s_req_server_with_at:
+ found_at = 1;
+
+ /* FALLTHROUGH */
+ case s_req_server:
+ uf = UF_HOST;
+ break;
+
+ case s_req_path:
+ uf = UF_PATH;
+ break;
+
+ case s_req_query_string:
+ uf = UF_QUERY;
+ break;
+
+ case s_req_fragment:
+ uf = UF_FRAGMENT;
+ break;
+
+ default:
+ assert(!"Unexpected state");
+ return 1;
+ }
+
+ /* Nothing's changed; soldier on */
+ if (uf == old_uf) {
+ u->field_data[uf].len++;
+ continue;
+ }
+
+ u->field_data[uf].off = p - buf;
+ u->field_data[uf].len = 1;
+
+ u->field_set |= (1 << uf);
+ old_uf = uf;
+ }
+
+ /* host must be present if there is a schema */
+ /* parsing http:///toto will fail */
+ if ((u->field_set & (1 << UF_SCHEMA)) &&
+ (u->field_set & (1 << UF_HOST)) == 0) {
+ return 1;
+ }
+
+ if (u->field_set & (1 << UF_HOST)) {
+ if (http_parse_host(buf, u, found_at) != 0) {
+ return 1;
+ }
+ }
+
+ /* CONNECT requests can only contain "hostname:port" */
+ if (is_connect && u->field_set != ((1 << UF_HOST)|(1 << UF_PORT))) {
+ return 1;
+ }
+
+ if (u->field_set & (1 << UF_PORT)) {
+ /* Don't bother with endp; we've already validated the string */
+ unsigned long v = strtoul(buf + u->field_data[UF_PORT].off, NULL, 10);
+
+ /* Ports have a max value of 2^16 */
+ if (v > 0xffff) {
+ return 1;
+ }
+
+ u->port = (uint16_t) v;
+ }
+
+ return 0;
+}
diff --git a/src/contrib/url-parser/url_parser.h b/src/contrib/url-parser/url_parser.h
new file mode 100644
index 0000000..0f916e0
--- /dev/null
+++ b/src/contrib/url-parser/url_parser.h
@@ -0,0 +1,64 @@
+/* Based on src/http/ngx_http_parse.c from NGINX copyright Igor Sysoev
+ *
+ * Additional changes are licensed under the same terms as NGINX and
+ * copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * 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.
+ */
+
+/**
+ * This is the http_parser_parse_url function extracted from joyent's
+ * http-parser library.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+enum http_parser_url_fields
+ { UF_SCHEMA = 0
+ , UF_HOST = 1
+ , UF_PORT = 2
+ , UF_PATH = 3
+ , UF_QUERY = 4
+ , UF_FRAGMENT = 5
+ , UF_USERINFO = 6
+ , UF_MAX = 7
+ };
+
+/* Result structure for http_parser_parse_url().
+ *
+ * Callers should index into field_data[] with UF_* values iff field_set
+ * has the relevant (1 << UF_*) bit set. As a courtesy to clients (and
+ * because we probably have padding left over), we convert any port to
+ * a uint16_t.
+ */
+struct http_parser_url {
+ uint16_t field_set; /* Bitmask of (1 << UF_*) values */
+ uint16_t port; /* Converted UF_PORT string */
+
+ struct {
+ uint16_t off; /* Offset into buffer in which field starts */
+ uint16_t len; /* Length of run in buffer */
+ } field_data[UF_MAX];
+};
+
+int
+http_parser_parse_url(const char *buf, size_t buflen, int is_connect,
+ struct http_parser_url *u);