be7a886225
This commit improves the URL health checking mechanism to reduce false negatives. - Treat all 2XX status codes as successful, addressing issues with codes like `204`. - Exclude URLs within Markdown inline code blocks. - Send the Host header for improved handling of webpages behind proxies. - Improve formatting and context for output messages. - Fix the defaulting options for redirects and cookie handling. - Add URL exclusion support for non-responsive URLs. - Update the user agent pool to modern browsers and platforms. - Improve CI/CD workflow to respond to modifications in the `test/checks/external-urls` directory, offering immediate feedback on potential impacts to the external URL test. - Add support for randomizing TLS fingerprint to mimic various clients better, improving the effectiveness of checks. However, this is not fully supported by Node.js's HTTP client; see nodejs/undici#1983 for more details. - Use `AbortSignal` instead of `AbortController` as more modern and simpler way to handle timeouts.
103 lines
4.0 KiB
Markdown
103 lines
4.0 KiB
Markdown
# status-checker
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A CLI and SDK for checking the availability of external URLs.
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🧐 Why?
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- 🏃 **Fast**: Batch checks the statuses of URLs in parallel.
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- 🤖 **Easy-to-Use**: Zero-touch startup with pre-configured settings for reliable results, yet customizable.
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- 🤞 **Reliable**: Mimics real web browser behavior by following redirects and maintaining cookie storage.
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🍭 Additional features
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- 😇 **Rate Limiting**: Queues requests by domain to be polite.
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- 🔁 **Retries**: Implements retry pattern with exponential back-off.
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- ⌚ **Timeouts**: Configurable timeout for each request.
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- 🎭️ **Impersonation**: Impersonate different browsers for each request.
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- **🌐 User-Agent Rotation**: Change user agents.
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- **🔑 TLS Handshakes**: Perform TLS and HTTP handshakes that are identical to that of a real browser.
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- 🫙 **Cookie jar**: Preserve cookies during redirects to mimic real browser.
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## CLI
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Coming soon 🚧
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## Programmatic usage
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The SDK supports both Node.js and browser environments.
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### `getUrlStatusesInParallel`
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```js
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// Simple example
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const statuses = await getUrlStatusesInParallel([ 'https://privacy.sexy', /* ... */ ]);
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if(statuses.all((r) => r.code === 200)) {
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console.log('All URLs are alive!');
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} else {
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console.log('Dead URLs:', statuses.filter((r) => r.code !== 200).map((r) => r.url));
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}
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// Fastest configuration
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const statuses = await getUrlStatusesInParallel([ 'https://privacy.sexy', /* ... */ ], {
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domainOptions: {
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sameDomainParallelize: false,
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}
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});
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```
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#### Batch request options
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- `domainOptions`:
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- **`sameDomainParallelize`**, (*boolean*), default: `false`
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- Determines if requests to the same domain will be parallelized.
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- Setting to `false` makes all requests parallel.
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- Setting to `true` queues requests for each unique domain while parallelizing across different domains.
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- Requests to different domains are always parallelized regardless of this option.
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- 💡 This helps to avoid `429 Too Many Requests` and be nice to websites
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- **`sameDomainDelayInMs`** (*number*), default: `3000` (3 seconds)
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- Sets the delay between requests to the same domain.
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- `requestOptions` (*object*): See [request options](#request-options).
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- `followOptions` (*object*): See [follow options](#follow-options).
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### `getUrlStatus`
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Check the availability of a single URL.
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```js
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// Simple example
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const status = await getUrlStatus('https://privacy.sexy');
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console.log(`Status code: ${status.code}`);
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```
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#### Request options
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- **`retryExponentialBaseInMs`** (*number*), default: `5000` (5 seconds)
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- Base time for the exponential back-off calculation for retries.
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- The longer the base time, the greater the intervals between retries.
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- **`additionalHeaders`** (*object*), default: `false`
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- Additional HTTP headers to send along with the default headers. Overrides default headers if specified.
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- **`requestTimeoutInMs`** (*number*), default: `60000` (60 seconds)
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- Time limit to abort the request if no response is received within the specified time frame.
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### `fetchFollow`
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Follows `3XX` redirects while preserving cookies.
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Same fetch API except third parameter that specifies [follow options](#follow-options), `redirect: 'follow' | 'manual' | 'error'` is discarded in favor of the third parameter.
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```js
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const status = await fetchFollow('https://privacy.sexy', 1000 /* timeout in milliseconds */);
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console.log(`Status code: ${status.code}`);
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```
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#### Follow options
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- **`followRedirects`** (*boolean*), default: `true`
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- Determines whether or not to follow redirects with `3XX` response codes.
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- **`maximumRedirectFollowDepth`** (*boolean*), default: `20`
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- Specifies the maximum number of sequential redirects that the function will follow.
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- 💡 Helps to solve maximum redirect reached errors.
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- **`enableCookies`** (*boolean*), default: `true`
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- Enables cookie storage to facilitate seamless navigation through login or other authentication challenges.
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- 💡 Helps to over-come sign-in challenges with callbacks.
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