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http-networking / popsicle-content-encoding
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
muslnode 18–226 runs
build_error
glibcnode 18–226 runs
build_error
Code
Verified usage
Verified import paths — ran on the pinned version, not inferred.
contentEncoding
✓ import { contentEncoding } from 'popsicle-content-encoding';
✗ const { contentEncoding } = require('popsicle-content-encoding');
The primary factory function for the middleware is a named export. While ESM is preferred, CommonJS users should destructure the export.
Options
✓ import type { Options } from 'popsicle-content-encoding';
The TypeScript interface for configuring the `contentEncoding` middleware, allowing control over supported compression types (gzip, brotli, deflate).
Middleware
✓ import type { Middleware } from 'servie';
✗ import type { Middleware } from 'popsicle-content-encoding';
The `contentEncoding` function returns a `Middleware` instance, whose type is defined by the `servie` peer dependency, not `popsicle-content-encoding` itself.
This quickstart demonstrates how to integrate `popsicle-content-encoding` into a Popsicle request pipeline, showing how to configure its `Options` to control `Content-Encoding` negotiation and decompression for HTTP requests.
import { compose } from 'servie';
import popsicle from 'popsicle'; // popsicle is typically a default export
import { transport } from 'servie-http'; // Common transport for servie/popsicle
import { contentEncoding, Options } from 'popsicle-content-encoding'; // Import Options
async function fetchDataWithCompression() {
const API_URL = 'https://jsonplaceholder.typicode.com/posts/1'; // A public API for demonstration
// Configure contentEncoding middleware with specific options
// For example, to explicitly enable gzip and brotli, or disable certain types.
const encodingOptions: Options = {
gzip: true,
brotli: true,
deflate: false, // Explicitly disable deflate for this request
};
// Compose the middleware pipeline: contentEncoding first to handle headers, then transport
const requestMiddleware = compose([
contentEncoding(encodingOptions), // Pass the configuration options
transport()
]);
const request = popsicle(API_URL, {
method: 'GET',
middleware: requestMiddleware, // Apply the composed middleware
});
try {
const response = await request.send();
console.log(`Status: ${response.status}`);
const contentEncodingHeader = response.headers.get('Content-Encoding');
console.log(`Content-Encoding Header (from response): ${contentEncodingHeader || 'N/A'}`);
console.log(`Response URL: ${response.url}`);
const data = await response.json(); // Body is automatically decoded by the middleware
console.log('Decoded data snippet (first 100 chars):', JSON.stringify(data).substring(0, 100) + '...');
if (typeof data === 'object' && data !== null) {
console.log('Successfully decoded JSON response and processed.');
} else {
console.warn('Response body might not be JSON or was not correctly decoded by the middleware.');
}
} catch (error: any) {
console.error('Error fetching data:', error.message);
}
}
fetchDataWithCompression();
Debug
Known issues
breakingThe `popsicle-content-encoding` functionality, previously integrated directly into `popsicle` core, has been extracted into this standalone package. Applications upgrading from older `popsicle` versions that relied on implicit content encoding will need to explicitly install and include this middleware in their request pipelines.fixInstall `popsicle-content-encoding` via `npm install popsicle-content-encoding` and add `contentEncoding()` to your Popsicle middleware chain (e.g., `compose([contentEncoding(), transport()])`).
affects: <1.0.0 (of this package)
gotchaThis package has a peer dependency on `servie` (version `^4.0.0`), which is not automatically installed by npm or yarn. Failure to install `servie` will result in runtime errors due to missing modules or type definitions.fixEnsure `servie` is installed alongside this package: `npm install servie@^4.0.0` or `yarn add servie@^4.0.0`.
affects: >=1.0.0
gotchaThe `contentEncoding` middleware will not modify the `Accept-Encoding` header or perform decoding if an `Accept-Encoding` header is already present in the request. This behavior allows for manual control but can be a source of confusion if automatic handling is expected.fixIf automatic `Accept-Encoding` population is desired, ensure the header is not manually set *before* the `contentEncoding` middleware runs. To override the automatic behavior, explicitly set `Accept-Encoding` in your request headers.
affects: >=1.0.0
Errors
Common errors & fixes
Error: Cannot find module 'servie'
The required peer dependency `servie` is not installed in the project.
fixInstall `servie` using your package manager: `npm install servie@^4.0.0` or `yarn add servie@^4.0.0`.
TypeError: Cannot destructure property 'contentEncoding' of 'undefined' or 'null'.
Attempting to `require` a named export from `popsicle-content-encoding` in a CommonJS context without proper destructuring, or when the module itself might not be correctly interpreted as CommonJS.
fixEnsure you are using `const { contentEncoding } = require('popsicle-content-encoding');` for CommonJS. For ESM, use `import { contentEncoding } from 'popsicle-content-encoding';`. TypeError: request.send is not a function
The `popsicle` request object does not have a `.send()` method because the necessary transport middleware (e.g., `servie-http`) was not included or correctly composed in the middleware chain.
fixEnsure `servie-http` (or another `servie`-compatible transport) is installed and included at the end of your middleware `compose` array, e.g., `compose([contentEncoding(), transport()])`.
Audit
Dependencies
servierequiredRequired as a peer dependency for middleware composition and core HTTP utilities, defining the `Middleware` type.