Registry / http-networking / changed-http

changed-http

library0.0.3jsnpmunverified

Polls HTTP/HTTPS resources and fires events when the response body changes. Version 0.0.3 is the latest (and only) release as of early 2013, with no updates since. Minimalist library using Node.js http/https modules, gzip decoding, and a custom compare function. Unlike general-purpose polling libraries, it is specifically scoped to monitoring HTTP content changes. No longer maintained; consider using newer alternatives or the built-in fetch with manual polling.

http-networking devops

npm install changed-http

github ↗package ↗

INSTALL

IMPORT

SIG · CHANGED-HTTP

changed-http

http-networkingjavascriptv0.0.3

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

changed

✓ const changed = require('changed-http');

✗ import changed from 'changed-http';

Only CommonJS (require) is supported; no ESM exports. No default export; the require returns the module object.

Resource

✓ const { Resource } = require('changed-http');

✗ const { Resource } = require('changed-http').Resource;

Resource is a named property of the required object, but also accessible via changed.Resource.

logger

✓ changed.logger = winston;

✗ changed.logger = 'custom logger';

logger is a property on the module object itself; it expects a logger object (e.g., winston) with .info method.

Creates a Resource polling http://example.com every 5 seconds, logs 'Resource changed!' when body changes. Demonstrates event-based monitoring.

changed-http --version

Debug

Known issues

gotchaPackage is unmaintained; no updates since 2013. May have unresolved HTTP parsing issues or vulnerabilities.

fix

Consider using modern alternatives like node-fetch with manual polling or chokidar for file changes.

affects: 0.0.3

gotchaNo TypeScript types. No d.ts files; using with TS requires manual type declarations.

fix

Create a custom .d.ts file or use as any.

affects: 0.0.3

gotchaThe compare function overrides the default string comparison. If it returns false in a truthy check, no 'changed' event fires.

fix

Ensure compare returns a boolean: true if changed, false otherwise.

affects: 0.0.3

gotchastartPolling() only accepts one argument (interval). It does not check for valid number; passing undefined or null uses default 10000ms.

fix

Always pass a positive number.

affects: 0.0.3

Errors

Common errors & fixes

Error: Cannot find module 'changed-http'

Package not installed correctly; old package name or npm install used wrong syntax.

fix

npm install robinjmurphy/changed

TypeError: changed.Resource is not a constructor

Import as default using import statement; no default export.

fix

Use const changed = require('changed-http'); then new changed.Resource(...)

TypeError: resource.on is not a function

Missing new keyword when constructing Resource.

fix

Use new changed.Resource(url, options)

AssertionError: false == true (in compare function)

Custom compare function returns a falsy value when change is detected, or truthy when no change.

fix

Return true when content differs, false otherwise.

Upgrade

Version history

0.0.3latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

23 hits · last 30 days

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Amazon

OpenAI (training)

Resources

githubhttps://github.com/robinjmurphy/changed ↗

packagehttps://www.npmjs.com/package/changed-http ↗