fix: Reset Content-length upon reset.

src/llhttp/http.ts

@@ -995,7 +995,7 @@ export class HTTP {
     // Check if we'd like to keep-alive
     n('cleanup')
       .otherwise(p.invoke(callback.afterMessageComplete, {
-        1: n('restart'),
+        1: this.update('content_length', 0, n('restart')),
       }, this.update('finish', FINISH.SAFE, lenientClose)));
 
     if (this.mode === 'strict') {

test/fixtures/extra.c

@@ -283,6 +283,9 @@ int llhttp__on_headers_complete(llparse_t* s, const char* p, const char* endp) {
 
   #ifdef LLHTTP__TEST_PAUSE_ON_HEADERS_COMPLETE
     return LLPARSE__ERROR_PAUSE;
+  #elif defined(LLHTTP__TEST_SKIP_BODY)
+    llparse__print(p, endp, "skip body");
+    return 1;
   #else
     return 0;
   #endif

test/md-test.ts

@@ -99,6 +99,10 @@ async function buildMode(mode: llhttp.HTTPMode, ty: TestType, meta: any)
     extra.push(`-DLLHTTP__TEST_PAUSE_${meta.pause.toUpperCase()}=1`);
   }
 
+  if (meta.skipBody) {
+    extra.push('-DLLHTTP__TEST_SKIP_BODY=1');
+  }
+
   entry = await build(node.llparse, node.entry, `${prefix}-${mode}-${ty}`, {
     extra,
   }, ty);

test/request/content-length.md

@@ -387,3 +387,48 @@ off=14 len=3 span[version]="1.1"
 off=17 version complete
 off=26 error code=10 reason="Invalid header token"
 ```
+
+## Content-Length reset when no body is received
+
+<!-- meta={"type": "request", "skipBody": true} -->
+```http
+PUT /url HTTP/1.1
+Content-Length: 123
+
+POST /url HTTP/1.1
+Content-Length: 456
+
+
+```
+
+```log
+off=0 message begin
+off=0 len=3 span[method]="PUT"
+off=3 method complete
+off=4 len=4 span[url]="/url"
+off=9 url complete
+off=14 len=3 span[version]="1.1"
+off=17 version complete
+off=19 len=14 span[header_field]="Content-Length"
+off=34 header_field complete
+off=35 len=3 span[header_value]="123"
+off=40 header_value complete
+off=42 headers complete method=4 v=1/1 flags=20 content_length=123
+off=42 skip body
+off=42 message complete
+off=42 reset
+off=42 message begin
+off=42 len=4 span[method]="POST"
+off=46 method complete
+off=47 len=4 span[url]="/url"
+off=52 url complete
+off=57 len=3 span[version]="1.1"
+off=60 version complete
+off=62 len=14 span[header_field]="Content-Length"
+off=77 header_field complete
+off=78 len=3 span[header_value]="456"
+off=83 header_value complete
+off=85 headers complete method=3 v=1/1 flags=20 content_length=456
+off=85 skip body
+off=85 message complete
+```

test/response/content-length.md

@@ -115,3 +115,44 @@ off=78 chunk header len=0
 off=80 chunk complete
 off=80 message complete
 ```
+
+## Content-Length reset when no body is received
+
+<!-- meta={"type": "response", "skipBody": true} -->
+```http
+HTTP/1.1 200 OK
+Content-Length: 123
+
+HTTP/1.1 200 OK
+Content-Length: 456
+
+
+```
+
+```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=17 status complete
+off=17 len=14 span[header_field]="Content-Length"
+off=32 header_field complete
+off=33 len=3 span[header_value]="123"
+off=38 header_value complete
+off=40 headers complete status=200 v=1/1 flags=20 content_length=123
+off=40 skip body
+off=40 message complete
+off=40 reset
+off=40 message begin
+off=45 len=3 span[version]="1.1"
+off=48 version complete
+off=53 len=2 span[status]="OK"
+off=57 status complete
+off=57 len=14 span[header_field]="Content-Length"
+off=72 header_field complete
+off=73 len=3 span[header_value]="456"
+off=78 header_value complete
+off=80 headers complete status=200 v=1/1 flags=20 content_length=456
+off=80 skip body
+off=80 message complete
+```