deps: update llhttp to 2.0.1

Changelog:

* Optional SSE4.2 support (at compile time)
* Lenient mode of operation

PR-URL: #30553
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

Author: indutny

deps/llhttp/README.md

@@ -14,6 +14,8 @@ This project aims to:
 * Verifiable
 * Improving benchmarks where possible
 
+More details in [Fedor Indutny's talk at JSConf EU 2019](https://youtu.be/x3k_5Mi66sY)
+
 ## How?
 
 Over time, different approaches for improving [http_parser][0]'s code base
@@ -30,11 +32,10 @@ So far llhttp outperforms http_parser:
 
 |                 | input size |  bandwidth   |  reqs/sec  |   time  |
 |:----------------|-----------:|-------------:|-----------:|--------:|
-| **llhttp** _(C)_ | 8192.00 mb | 1497.88 mb/s | 3020458.87 ops/sec | 5.47 s |
-| **llhttp** _(bitcode)_ | 8192.00 mb | 1131.75 mb/s | 2282171.24 ops/sec | 7.24 s |
+| **llhttp** _(C)_ | 8192.00 mb | 1777.24 mb/s | 3583799.39 ops/sec | 4.61 s |
 | **http_parser** | 8192.00 mb | 694.66 mb/s | 1406180.33 req/sec | 11.79 s |
 
-llhttp is faster by approximately **116%**.
+llhttp is faster by approximately **156%**.
 
 ## Maintenance
 
@@ -77,8 +78,6 @@ settings.on_message_complete = handle_on_message_complete;
  */
 llhttp_init(&parser, HTTP_BOTH, &settings);
 
-/* Use `llhttp_set_type(&parser, HTTP_REQUEST);` to override the mode */
-
 /* Parse request! */
 const char* request = "GET / HTTP/1.1\r\n\r\n";
 int request_len = strlen(request);

deps/llhttp/include/llhttp.h

@@ -1,9 +1,9 @@
 #ifndef INCLUDE_LLHTTP_H_
 #define INCLUDE_LLHTTP_H_
 
-#define LLHTTP_VERSION_MAJOR 1
-#define LLHTTP_VERSION_MINOR 1
-#define LLHTTP_VERSION_PATCH 4
+#define LLHTTP_VERSION_MAJOR 2
+#define LLHTTP_VERSION_MINOR 0
+#define LLHTTP_VERSION_PATCH 1
 
 #ifndef INCLUDE_LLHTTP_ITSELF_H_
 #define INCLUDE_LLHTTP_ITSELF_H_
@@ -29,7 +29,7 @@ struct llhttp__internal_s {
   uint8_t http_major;
   uint8_t http_minor;
   uint8_t header_state;
-  uint8_t flags;
+  uint16_t flags;
   uint8_t upgrade;
   uint16_t status_code;
   uint8_t finish;
@@ -85,7 +85,8 @@ enum llhttp_flags {
   F_UPGRADE = 0x10,
   F_CONTENT_LENGTH = 0x20,
   F_SKIPBODY = 0x40,
-  F_TRAILING = 0x80
+  F_TRAILING = 0x80,
+  F_LENIENT = 0x100
 };
 typedef enum llhttp_flags llhttp_flags_t;
 
@@ -297,7 +298,7 @@ llhttp_errno_t llhttp_finish(llhttp_t* parser);
 int llhttp_message_needs_eof(const llhttp_t* parser);
 
 /* Returns `1` if there might be any other messages following the last that was
- * successfuly parsed.
+ * successfully parsed.
  */
 int llhttp_should_keep_alive(const llhttp_t* parser);
 
@@ -353,6 +354,18 @@ const char* llhttp_errno_name(llhttp_errno_t err);
 /* Returns textual name of HTTP method */
 const char* llhttp_method_name(llhttp_method_t method);
 
+
+/* Enables/disables lenient header value parsing (disabled by default).
+ *
+ * Lenient parsing disables header value token checks, extending llhttp's
+ * protocol support to highly non-compliant clients/server. No
+ * `HPE_INVALID_HEADER_TOKEN` will be raised for incorrect header values when
+ * lenient parsing is "on".
+ *
+ * **(USE AT YOUR OWN RISK)**
+ */
+void llhttp_set_lenient(llhttp_t* parser, int enabled);
+
 #ifdef __cplusplus
 }  /* extern "C" */
 #endif

deps/llhttp/src/api.c

@@ -127,6 +127,15 @@ const char* llhttp_method_name(llhttp_method_t method) {
 }
 
 
+void llhttp_set_lenient(llhttp_t* parser, int enabled) {
+  if (enabled) {
+    parser->flags |= F_LENIENT;
+  } else {
+    parser->flags &= ~F_LENIENT;
+  }
+}
+
+
 /* Callbacks */
 
 

deps/llhttp/src/http.c

@@ -74,9 +74,11 @@ int llhttp__after_message_complete(llhttp_t* parser, const char* p,
   int should_keep_alive;
 
   should_keep_alive = llhttp_should_keep_alive(parser);
-  parser->flags = 0;
   parser->finish = HTTP_FINISH_SAFE;
 
+  /* Keep `F_LENIENT` flag between messages, but reset every other flag */
+  parser->flags &= F_LENIENT;
+
   /* NOTE: this is ignored in loose parsing mode */
   return should_keep_alive;
 }