Bump llhttp to 4.0.0

third-party/llhttp/README.md

 # llhttp
+[![CI](https://github.com/nodejs/llhttp/workflows/CI/badge.svg)](https://github.com/nodejs/llhttp/actions?query=workflow%3ACI)
 
 Port of [http_parser][0] to [llparse][1].
 
@@ -31,7 +32,7 @@ So far llhttp outperforms http_parser:
 
 |                 | input size |  bandwidth   |  reqs/sec  |   time  |
 |:----------------|-----------:|-------------:|-----------:|--------:|
-| **llhttp**      | 8192.00 mb | 1777.24 mb/s | 3583799.39 ops/sec | 4.61 s |
+| **llhttp**      | 8192.00 mb | 1777.24 mb/s | 3583799.39 req/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 **156%**.
@@ -92,6 +93,11 @@ if (err == HPE_OK) {
 
 ---
 
+### Bindings to other languages
+
+* Python: [pallas/pyllhttp][8]
+* Ruby: [metabahn/llhttp][9]
+
 #### LICENSE
 
 This software is licensed under the MIT License.
@@ -125,3 +131,5 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 [5]: https://llvm.org/docs/LangRef.html#call-instruction
 [6]: https://clang.llvm.org/
 [7]: https://github.com/nodejs/node
+[8]: https://github.com/pallas/pyllhttp
+[9]: https://github.com/metabahn/llhttp

third-party/llhttp/include/llhttp.h

 #ifndef INCLUDE_LLHTTP_H_
 #define INCLUDE_LLHTTP_H_
 
-#define LLHTTP_VERSION_MAJOR 2
-#define LLHTTP_VERSION_MINOR 2
+#define LLHTTP_VERSION_MAJOR 4
+#define LLHTTP_VERSION_MINOR 0
 #define LLHTTP_VERSION_PATCH 0
 
 #ifndef LLHTTP_STRICT_MODE
@@ -33,10 +33,11 @@ struct llhttp__internal_s {
   uint8_t http_major;
   uint8_t http_minor;
   uint8_t header_state;
-  uint16_t flags;
+  uint8_t lenient_flags;
   uint8_t upgrade;
-  uint16_t status_code;
   uint8_t finish;
+  uint16_t flags;
+  uint16_t status_code;
   void* settings;
 };
 
@@ -91,11 +92,16 @@ enum llhttp_flags {
   F_CONTENT_LENGTH = 0x20,
   F_SKIPBODY = 0x40,
   F_TRAILING = 0x80,
-  F_LENIENT = 0x100,
   F_TRANSFER_ENCODING = 0x200
 };
 typedef enum llhttp_flags llhttp_flags_t;
 
+enum llhttp_lenient_flags {
+  LENIENT_HEADERS = 0x1,
+  LENIENT_CHUNKED_LENGTH = 0x2
+};
+typedef enum llhttp_lenient_flags llhttp_lenient_flags_t;
+
 enum llhttp_type {
   HTTP_BOTH = 0,
   HTTP_REQUEST = 1,
@@ -286,6 +292,11 @@ struct llhttp_settings_s {
    */
   llhttp_cb      on_chunk_header;
   llhttp_cb      on_chunk_complete;
+
+  llhttp_cb      on_url_complete;
+  llhttp_cb      on_status_complete;
+  llhttp_cb      on_header_field_complete;
+  llhttp_cb      on_header_value_complete;
 };
 
 /* Initialize the parser with specific type and user settings.
@@ -297,6 +308,11 @@ struct llhttp_settings_s {
 void llhttp_init(llhttp_t* parser, llhttp_type_t type,
                  const llhttp_settings_t* settings);
 
+/* Reset an already initialized parser back to the start state, preserving the
+ * existing parser type, callback settings, user data, and lenient flags.
+ */
+void llhttp_reset(llhttp_t* parser);
+
 /* Initialize the settings object */
 void llhttp_settings_init(llhttp_settings_t* settings);
 
@@ -400,7 +416,20 @@ const char* llhttp_method_name(llhttp_method_t method);
  *
  * **(USE AT YOUR OWN RISK)**
  */
-void llhttp_set_lenient(llhttp_t* parser, int enabled);
+void llhttp_set_lenient_headers(llhttp_t* parser, int enabled);
+
+
+/* Enables/disables lenient handling of conflicting `Transfer-Encoding` and
+ * `Content-Length` headers (disabled by default).
+ *
+ * Normally `llhttp` would error when `Transfer-Encoding` is present in
+ * conjunction with `Content-Length`. This error is important to prevent HTTP
+ * request smuggling, but may be less desirable for small number of cases
+ * involving legacy servers.
+ *
+ * **(USE AT YOUR OWN RISK)**
+ */
+void llhttp_set_lenient_chunked_length(llhttp_t* parser, int enabled);
 
 #ifdef __cplusplus
 }  /* extern "C" */

third-party/llhttp/src/api.c

@@ -6,8 +6,8 @@
 
 #define CALLBACK_MAYBE(PARSER, NAME, ...)                                     \
   do {                                                                        \
-    llhttp_settings_t* settings;                                              \
-    settings = (llhttp_settings_t*) (PARSER)->settings;                       \
+    const llhttp_settings_t* settings;                                        \
+    settings = (const llhttp_settings_t*) (PARSER)->settings;                 \
     if (settings == NULL || settings->NAME == NULL) {                         \
       err = 0;                                                                \
       break;                                                                  \
@@ -24,6 +24,21 @@ void llhttp_init(llhttp_t* parser, llhttp_type_t type,
 }
 
 
+void llhttp_reset(llhttp_t* parser) {
+  llhttp_type_t type = parser->type;
+  const llhttp_settings_t* settings = parser->settings;
+  void* data = parser->data;
+  uint8_t lenient_flags = parser->lenient_flags;
+
+  llhttp__internal_init(parser);
+
+  parser->type = type;
+  parser->settings = (void*) settings;
+  parser->data = data;
+  parser->lenient_flags = lenient_flags;
+}
+
+
 llhttp_errno_t llhttp_execute(llhttp_t* parser, const char* data, size_t len) {
   return llhttp__internal_execute(parser, data, data + len);
 }
@@ -127,11 +142,19 @@ const char* llhttp_method_name(llhttp_method_t method) {
 }
 
 
-void llhttp_set_lenient(llhttp_t* parser, int enabled) {
+void llhttp_set_lenient_headers(llhttp_t* parser, int enabled) {
   if (enabled) {
-    parser->flags |= F_LENIENT;
+    parser->lenient_flags |= LENIENT_HEADERS;
   } else {
-    parser->flags &= ~F_LENIENT;
+    parser->lenient_flags &= ~LENIENT_HEADERS;
+  }
+}
+
+void llhttp_set_lenient_chunked_length(llhttp_t* parser, int enabled) {
+  if (enabled) {
+    parser->lenient_flags |= LENIENT_CHUNKED_LENGTH;
+  } else {
+    parser->lenient_flags &= ~LENIENT_CHUNKED_LENGTH;
   }
 }
 
@@ -153,6 +176,13 @@ int llhttp__on_url(llhttp_t* s, const char* p, const char* endp) {
 }
 
 
+int llhttp__on_url_complete(llhttp_t* s, const char* p, const char* endp) {
+  int err;
+  CALLBACK_MAYBE(s, on_url_complete, s);
+  return err;
+}
+
+
 int llhttp__on_status(llhttp_t* s, const char* p, const char* endp) {
   int err;
   CALLBACK_MAYBE(s, on_status, s, p, endp - p);
@@ -160,6 +190,13 @@ int llhttp__on_status(llhttp_t* s, const char* p, const char* endp) {
 }
 
 
+int llhttp__on_status_complete(llhttp_t* s, const char* p, const char* endp) {
+  int err;
+  CALLBACK_MAYBE(s, on_status_complete, s);
+  return err;
+}
+
+
 int llhttp__on_header_field(llhttp_t* s, const char* p, const char* endp) {
   int err;
   CALLBACK_MAYBE(s, on_header_field, s, p, endp - p);
@@ -167,6 +204,13 @@ int llhttp__on_header_field(llhttp_t* s, const char* p, const char* endp) {
 }
 
 
+int llhttp__on_header_field_complete(llhttp_t* s, const char* p, const char* endp) {
+  int err;
+  CALLBACK_MAYBE(s, on_header_field_complete, s);
+  return err;
+}
+
+
 int llhttp__on_header_value(llhttp_t* s, const char* p, const char* endp) {
   int err;
   CALLBACK_MAYBE(s, on_header_value, s, p, endp - p);
@@ -174,6 +218,13 @@ int llhttp__on_header_value(llhttp_t* s, const char* p, const char* endp) {
 }
 
 
+int llhttp__on_header_value_complete(llhttp_t* s, const char* p, const char* endp) {
+  int err;
+  CALLBACK_MAYBE(s, on_header_value_complete, s);
+  return err;
+}
+
+
 int llhttp__on_headers_complete(llhttp_t* s, const char* p, const char* endp) {
   int err;
   CALLBACK_MAYBE(s, on_headers_complete, s);

third-party/llhttp/src/http.c

@@ -51,7 +51,8 @@ int llhttp__after_headers_complete(llhttp_t* parser, const char* p,
     /* chunked encoding - ignore Content-Length header, prepare for a chunk */
     return 2;
   } else if (parser->flags & F_TRANSFER_ENCODING) {
-    if (parser->type == HTTP_REQUEST && (parser->flags & F_LENIENT) == 0) {
+    if (parser->type == HTTP_REQUEST &&
+        (parser->lenient_flags & LENIENT_CHUNKED_LENGTH) == 0) {
       /* RFC 7230 3.3.3 */
 
       /* If a Transfer-Encoding header field
@@ -97,9 +98,7 @@ int llhttp__after_message_complete(llhttp_t* parser, const char* p,
 
   should_keep_alive = llhttp_should_keep_alive(parser);
   parser->finish = HTTP_FINISH_SAFE;
-
-  /* Keep `F_LENIENT` flag between messages, but reset every other flag */
-  parser->flags &= F_LENIENT;
+  parser->flags = 0;
 
   /* NOTE: this is ignored in loose parsing mode */
   return should_keep_alive;