fix: Support all LF messages. (#239)

* fix: Support all LF messages.

* fix: Fixed test.

Author: ShogunPanda

src/llhttp/http.ts

@@ -495,6 +495,9 @@ export class HTTP {
     const span = this.span;
     const n = (name: string): Match => this.node<Match>(name);
 
+    const onInvalidHeaderFieldChar =
+      p.error(ERROR.INVALID_HEADER_TOKEN, 'Invalid header field char');
+
     n('headers_start')
       .match(' ',
         this.testLenientFlags(LENIENT_FLAGS.HEADERS, {
@@ -505,6 +508,11 @@ export class HTTP {
 
     n('header_field_start')
       .match('\r', n('headers_almost_done'))
+      .match('\n',
+        this.testLenientFlags(LENIENT_FLAGS.HEADERS, {
+          1: n('headers_done'),
+        }, onInvalidHeaderFieldChar),
+      )
       .otherwise(span.headerField.start(n('header_field')));
 
     n('header_field')
@@ -517,9 +525,6 @@ export class HTTP {
       'on_header_field_complete', ERROR.CB_HEADER_FIELD_COMPLETE, n('header_value_discard_ws'),
     );
 
-    const onInvalidHeaderFieldChar =
-      p.error(ERROR.INVALID_HEADER_TOKEN, 'Invalid header field char');
-
     const checkLenientFlagsOnColon =
       this.testLenientFlags(LENIENT_FLAGS.HEADERS, {
         1: n('header_field_colon_discard_ws'),

test/fixtures/extra.c

@@ -76,6 +76,24 @@ void llhttp__test_init_response(llparse_t* s) {
 }
 
 
+void llhttp__test_init_request_lenient_all(llparse_t* s) {
+  llhttp__test_init_request(s);
+  s->lenient_flags |= 
+    LENIENT_HEADERS | LENIENT_CHUNKED_LENGTH | LENIENT_KEEP_ALIVE |
+    LENIENT_TRANSFER_ENCODING | LENIENT_VERSION | LENIENT_DATA_AFTER_CLOSE |
+    LENIENT_OPTIONAL_LF_AFTER_CR | LENIENT_OPTIONAL_CRLF_AFTER_CHUNK;
+}
+
+
+void llhttp__test_init_response_lenient_all(llparse_t* s) {
+  llhttp__test_init_response(s);
+  s->lenient_flags |= 
+    LENIENT_HEADERS | LENIENT_CHUNKED_LENGTH | LENIENT_KEEP_ALIVE |
+    LENIENT_TRANSFER_ENCODING | LENIENT_VERSION | LENIENT_DATA_AFTER_CLOSE |
+    LENIENT_OPTIONAL_LF_AFTER_CR | LENIENT_OPTIONAL_CRLF_AFTER_CHUNK;
+}
+
+
 void llhttp__test_init_request_lenient_headers(llparse_t* s) {
   llhttp__test_init_request(s);
   s->lenient_flags |= LENIENT_HEADERS;

test/fixtures/index.ts

@@ -11,6 +11,7 @@ import * as llhttp from '../../src/llhttp';
 export { FixtureResult };
 
 export type TestType = 'request' | 'response' | 'request-finish' | 'response-finish' |
+  'request-lenient-all' | 'response-lenient-all' |
   'request-lenient-headers' | 'request-lenient-chunked-length' | 'request-lenient-transfer-encoding' |
   'request-lenient-keep-alive' | 'response-lenient-keep-alive' | 'response-lenient-headers' |
   'request-lenient-version' | 'response-lenient-version' |
@@ -24,6 +25,8 @@ export const allowedTypes: TestType[] = [
   'response',
   'request-finish',
   'response-finish',
+  'request-lenient-all',
+  'response-lenient-all',
   'request-lenient-headers',
   'response-lenient-headers',
   'request-lenient-keep-alive',

test/request/content-length.md

@@ -220,7 +220,7 @@ off=79 error code=22 reason="Pause on CONNECT/Upgrade"
 ```http
 PUT /url HTTP/1.1
 Content-Length: 1
-Transfer-Encoding: chunked
+Transfer-Encoding: identity
 
 
 ```
@@ -239,9 +239,9 @@ off=35 len=1 span[header_value]="1"
 off=38 header_value complete
 off=38 len=17 span[header_field]="Transfer-Encoding"
 off=56 header_field complete
-off=57 len=7 span[header_value]="chunked"
-off=66 header_value complete
-off=68 headers complete method=4 v=1/1 flags=228 content_length=1
+off=57 len=8 span[header_value]="identity"
+off=67 header_value complete
+off=69 headers complete method=4 v=1/1 flags=220 content_length=1
 ```
 
 ## Funky `Content-Length` with body

test/response/invalid.md

@@ -196,4 +196,39 @@ off=0 message begin
 off=5 len=3 span[version]="1.1"
 off=8 version complete
 off=10 error code=13 reason="Invalid status code"
+```
+
+### Only LFs present
+
+<!-- meta={"type": "response"} -->
+```http
+HTTP/1.1 200 OK\nContent-Length: 0\n\n
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=16 error code=2 reason="Expected LF after CR"
+```
+
+### Only LFs present (lenient)
+
+<!-- meta={"type": "response-lenient-all"} -->
+```http
+HTTP/1.1 200 OK\nContent-Length: 0\n\n
+```
+
+```log
+off=0 message begin
+off=5 len=3 span[version]="1.1"
+off=8 version complete
+off=13 len=2 span[status]="OK"
+off=16 status complete
+off=16 len=14 span[header_field]="Content-Length"
+off=31 header_field complete
+off=32 len=1 span[header_value]="0"
+off=34 header_value complete
+off=35 message complete
 ```