url: preserve null char in WHATWG URL errors

A null character in the middle of an invalid URL was resulting in an error message that truncated the input string. This preserves the entire input string in the error message. Refs: nodejs#39592
Trott · Mar 9, 2022 · bdfc590 · bdfc590
1 parent e8ac3b4
commit bdfc590
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Showing 3 changed files with 15 additions and 19 deletions.
diff --git a/lib/internal/url.js b/lib/internal/url.js
@@ -559,7 +559,7 @@ function onParseComplete(flags, protocol, username, password,
   initSearchParams(this[searchParams], query);
 }
 
-function onParseError(flags, input) {
+function onParseError(input, flags) {
   throw new ERR_INVALID_URL(input);
 }
 
@@ -641,7 +641,8 @@ class URL {
     }
     this[context] = new URLContext();
     parse(input, -1, base_context, undefined,
-          FunctionPrototypeBind(onParseComplete, this), onParseError);
+          FunctionPrototypeBind(onParseComplete, this),
+          FunctionPrototypeBind(onParseError, this, input));
   }
 
   get [special]() {
@@ -760,7 +761,8 @@ class URL {
     // toUSVString is not needed.
     input = `${input}`;
     parse(input, -1, undefined, undefined,
-          FunctionPrototypeBind(onParseComplete, this), onParseError);
+          FunctionPrototypeBind(onParseComplete, this),
+          FunctionPrototypeBind(onParseError, this, input));
   }
 
   // readonly

diff --git a/src/node_url.cc b/src/node_url.cc
@@ -142,22 +142,12 @@ URLHost::~URLHost() {
   XX(ARG_FRAGMENT)                                                            \
   XX(ARG_COUNT)  // This one has to be last.
 
-#define ERR_ARGS(XX)                                                          \
-  XX(ERR_ARG_FLAGS)                                                           \
-  XX(ERR_ARG_INPUT)                                                           \
-
 enum url_cb_args {
 #define XX(name) name,
   ARGS(XX)
 #undef XX
 };
 
-enum url_error_cb_args {
-#define XX(name) name,
-  ERR_ARGS(XX)
-#undef XX
-};
-
 #define TWO_CHAR_STRING_TEST(bits, name, expr)                                \
   template <typename T>                                                       \
   bool name(const T ch1, const T ch2) {                                \
@@ -1679,12 +1669,8 @@ void Parse(Environment* env,
     SetArgs(env, argv, url);
     cb->Call(context, recv, arraysize(argv), argv).FromMaybe(Local<Value>());
   } else if (error_cb->IsFunction()) {
-    Local<Value> argv[2] = { undef, undef };
-    argv[ERR_ARG_FLAGS] = Integer::NewFromUnsigned(isolate, url.flags);
-    argv[ERR_ARG_INPUT] =
-      String::NewFromUtf8(env->isolate(), input).ToLocalChecked();
-    error_cb.As<Function>()->Call(context, recv, arraysize(argv), argv)
-        .FromMaybe(Local<Value>());
+    Local<Value> flags = Integer::NewFromUnsigned(isolate, url.flags);
+    USE(error_cb.As<Function>()->Call(context, recv, 1, &flags));
   }
 }
 

diff --git a/test/parallel/test-url-null-char.js b/test/parallel/test-url-null-char.js
@@ -0,0 +1,8 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+
+assert.throws(
+  () => { new URL('a\0b'); },
+  { input: 'a\0b' }
+);