Update llhttp

CONTRIBUTING.md

@@ -1,4 +1,79 @@
-# Developer's Certificate of Origin 1.1
+# Contributing to Undici
+
+* [Guides](#guides)
+  * [Update `llhttp`](#update-llhttp)
+* [Developer's Certificate of Origin 1.1](#developers-certificate-of-origin)
+  * [Moderation Policy](#moderation-policy)
+
+<a id="guides"></a>
+## Guides
+
+<a id="update-llhttp"></a>
+### Update `llhttp`
+
+The HTTP parser used by `undici` is a WebAssembly build of [`llhttp`](https://github.com/nodejs/llhttp).
+
+While the project itself provides a way to compile targeting WebAssembly, at the moment we embed the sources
+directly and compile the module in `undici`.
+
+The `deps/llhttp/include` folder contains the C header files, while the `deps/llhttp/src` folder contains
+the C source files needed to compile the module.
+
+The `lib/llhttp` folder contains the `.js` transpiled assets required to implement a parser.
+
+The following are the steps required to perform an update.
+
+#### Clone the [llhttp](https://github.com/nodejs/llhttp) project
+
+```bash
+git clone git@github.com:nodejs/llhttp.git
+
+cd llhttp
+```
+#### Checkout a `llhttp` release
+
+```bash
+git checkout <tag>
+```
+
+#### Install the `llhttp` dependencies
+
+```bash
+npm i
+```
+
+#### Run the wasm build script
+
+```bash
+npm run build-wasm
+```
+
+#### Copy the sources to `undici`
+
+```bash
+cp build/wasm/*.js <your-path-to-undici>/lib/llhttp/
+
+cp build/wasm/*.js.map <your-path-to-undici>/lib/llhttp/
+
+cp build/wasm/*.d.ts <your-path-to-undici>/lib/llhttp/
+
+cp src/native/api.c src/native/http.c build/c/llhttp.c <your-path-to-undici>/deps/llhttp/src/
+
+cp src/native/api.h build/llhttp.h <your-path-to-undici>/deps/llhttp/include/
+```
+
+#### Build the WebAssembly module in `undici`
+
+> This requires [docker](https://www.docker.com/) installed on your machine.
+
+```bash
+cd <your-path-to-undici>
+
+npm run build:wasm
+```
+
+<a id="developers-certificate-of-origin"></a>
+## Developer's Certificate of Origin 1.1
 
 By making a contribution to this project, I certify that:
 
@@ -24,7 +99,8 @@ By making a contribution to this project, I certify that:
   maintained indefinitely and may be redistributed consistent with
   this project or the open source license(s) involved.
 
-## Moderation Policy
+<a id="moderation-policy"></a>
+### Moderation Policy
 
 The [Node.js Moderation Policy] applies to this project.
 

deps/llhttp/include/llhttp.h

@@ -1,8 +1,8 @@
 #ifndef INCLUDE_LLHTTP_H_
 #define INCLUDE_LLHTTP_H_
 
-#define LLHTTP_VERSION_MAJOR 4
-#define LLHTTP_VERSION_MINOR 0
+#define LLHTTP_VERSION_MAJOR 5
+#define LLHTTP_VERSION_MINOR 1
 #define LLHTTP_VERSION_PATCH 0
 
 #ifndef LLHTTP_STRICT_MODE
@@ -79,7 +79,8 @@ enum llhttp_errno {
   HPE_CB_CHUNK_COMPLETE = 20,
   HPE_PAUSED = 21,
   HPE_PAUSED_UPGRADE = 22,
-  HPE_USER = 23
+  HPE_PAUSED_H2_UPGRADE = 23,
+  HPE_USER = 24
 };
 typedef enum llhttp_errno llhttp_errno_t;
 
@@ -98,7 +99,8 @@ typedef enum llhttp_flags llhttp_flags_t;
 
 enum llhttp_lenient_flags {
   LENIENT_HEADERS = 0x1,
-  LENIENT_CHUNKED_LENGTH = 0x2
+  LENIENT_CHUNKED_LENGTH = 0x2,
+  LENIENT_KEEP_ALIVE = 0x4
 };
 typedef enum llhttp_lenient_flags llhttp_lenient_flags_t;
 
@@ -190,7 +192,8 @@ typedef enum llhttp_method llhttp_method_t;
   XX(20, CB_CHUNK_COMPLETE, CB_CHUNK_COMPLETE) \
   XX(21, PAUSED, PAUSED) \
   XX(22, PAUSED_UPGRADE, PAUSED_UPGRADE) \
-  XX(23, USER, USER) \
+  XX(23, PAUSED_H2_UPGRADE, PAUSED_H2_UPGRADE) \
+  XX(24, USER, USER) \
 
 
 #define HTTP_METHOD_MAP(XX) \
@@ -483,6 +486,20 @@ void llhttp_set_lenient_headers(llhttp_t* parser, int enabled);
 LLHTTP_EXPORT
 void llhttp_set_lenient_chunked_length(llhttp_t* parser, int enabled);
 
+
+/* Enables/disables lenient handling of `Connection: close` and HTTP/1.0
+ * requests responses.
+ *
+ * Normally `llhttp` would error on (in strict mode) or discard (in loose mode)
+ * the HTTP request/response after the request/response with `Connection: close`
+ * and `Content-Length`. This is important to prevent cache poisoning attacks,
+ * but might interact badly with outdated and insecure clients. With this flag
+ * the extra request/response will be parsed normally.
+ *
+ * **(USE AT YOUR OWN RISK)**
+ */
+void llhttp_set_lenient_keep_alive(llhttp_t* parser, int enabled);
+
 #ifdef __cplusplus
 }  /* extern "C" */
 #endif

deps/llhttp/src/api.c

@@ -214,6 +214,7 @@ void llhttp_set_lenient_headers(llhttp_t* parser, int enabled) {
   }
 }
 
+
 void llhttp_set_lenient_chunked_length(llhttp_t* parser, int enabled) {
   if (enabled) {
     parser->lenient_flags |= LENIENT_CHUNKED_LENGTH;
@@ -223,6 +224,14 @@ void llhttp_set_lenient_chunked_length(llhttp_t* parser, int enabled) {
 }
 
 
+void llhttp_set_lenient_keep_alive(llhttp_t* parser, int enabled) {
+  if (enabled) {
+    parser->lenient_flags |= LENIENT_KEEP_ALIVE;
+  } else {
+    parser->lenient_flags &= ~LENIENT_KEEP_ALIVE;
+  }
+}
+
 /* Callbacks */
 
 
@@ -324,7 +333,7 @@ int llhttp__on_chunk_complete(llhttp_t* s, const char* p, const char* endp) {
 }
 
 
-/* Private https://github.com/dnlup/llhttp/blob/undici_wasm/wasm.js*/
+/* Private */
 
 
 void llhttp__debug(llhttp_t* s, const char* p, const char* endp,