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BlockedError

@forge/monorepo

@forge/monorepo / backend/src / BlockedError

Class: BlockedError

Defined in: backend/src/toolkit/ssrf.ts:187

The SSRF-hardened fetch, shared — REQ-055 (#237), tasks #238 and #239.

It was written for tools-scrape and lives here because tools-browser needs the same implementation rather than a second copy: a browser navigating to 169.254.169.254 is the same hole as a fetch doing it, and two copies of an address classifier is how one of them ends up missing the IPv6-mapped forms.

Not a replacement for mcp/egress.ts, which is deliberately stricter. That one denies every IPv6 literal unless explicitly allowed, which is right for an MCP endpoint an operator configures once and wrong for scraping the open web, where a great many real sites are v6-only. They differ because the questions differ, and merging them would mean picking one answer for both.

Extends​

  • Error

Constructors​

Constructor​

new BlockedError(message?): BlockedError

Defined in: website/node_modules/typescript/lib/lib.es5.d.ts:1082

Parameters​

message?​

string

Returns​

BlockedError

Inherited from​

Error.constructor

Constructor​

new BlockedError(message?, options?): BlockedError

Defined in: website/node_modules/typescript/lib/lib.es5.d.ts:1082

Parameters​

message?​

string

options?​

ErrorOptions

Returns​

BlockedError

Inherited from​

Error.constructor

Properties​

cause?​

optional cause?: unknown

Defined in: website/node_modules/typescript/lib/lib.es2022.error.d.ts:26

Inherited from​

Error.cause

message​

message: string

Defined in: website/node_modules/typescript/lib/lib.es5.d.ts:1077

Inherited from​

Error.message

name​

name: string

Defined in: website/node_modules/typescript/lib/lib.es5.d.ts:1076

Inherited from​

Error.name

stack?​

optional stack?: string

Defined in: website/node_modules/typescript/lib/lib.es5.d.ts:1078

Inherited from​

Error.stack

stackTraceLimit​

static stackTraceLimit: number

Defined in: website/node_modules/@types/node/globals.d.ts:67

The Error.stackTraceLimit property specifies the number of stack frames collected by a stack trace (whether generated by new Error().stack or Error.captureStackTrace(obj)).

The default value is 10 but may be set to any valid JavaScript number. Changes will affect any stack trace captured after the value has been changed.

If set to a non-number value, or set to a negative number, stack traces will not capture any frames.

Inherited from​

Error.stackTraceLimit

Methods​

captureStackTrace()​

static captureStackTrace(targetObject, constructorOpt?): void

Defined in: website/node_modules/@types/node/globals.d.ts:51

Creates a .stack property on targetObject, which when accessed returns a string representing the location in the code at which Error.captureStackTrace() was called.

const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack;  // Similar to `new Error().stack`

The first line of the trace will be prefixed with ${myObject.name}: ${myObject.message}.

The optional constructorOpt argument accepts a function. If given, all frames above constructorOpt, including constructorOpt, will be omitted from the generated stack trace.

The constructorOpt argument is useful for hiding implementation details of error generation from the user. For instance:

function a() {
  b();
}

function b() {
  c();
}

function c() {
  // Create an error without stack trace to avoid calculating the stack trace twice.
  const { stackTraceLimit } = Error;
  Error.stackTraceLimit = 0;
  const error = new Error();
  Error.stackTraceLimit = stackTraceLimit;

  // Capture the stack trace above function b
  Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
  throw error;
}

a();

Parameters​

targetObject​

object

constructorOpt?​

Function

Returns​

void

Inherited from​

Error.captureStackTrace

prepareStackTrace()​

static prepareStackTrace(err, stackTraces): any

Defined in: website/node_modules/@types/node/globals.d.ts:55

Parameters​

err​

Error

stackTraces​

CallSite[]

Returns​

any

See​

https://v8.dev/docs/stack-trace-api#customizing-stack-traces

Inherited from​

Error.prepareStackTrace