repository·master·Indexed 27 days ago
https://github.com/unetworking/uwebsockets.jsA high-performance, standards-compliant web server implemented as a native V8 addon for Node.js and serving as the core engine for the Bun runtime. It is written in C++ for extreme scale and low latency, featuring the DeclarativeResponse API for constructing responses via a builder pattern.
uWebSockets.js is not available in the standard NPM registry. To install it, you must use the NPM client to install directly from the GitHub repository. Specify the desired version using the # suffix.
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npm install uNetworking/uWebSockets.js#v20.67.0uWS.js (v20.67.0) only supports Node.js versions 22, 24, and 26 on glibc Linux, macOS, and Windows (Tier 1 platforms).DeclarativeResponse class provides a builder pattern to construct responses using a sequence of instructions and values. It is used to append headers, body markers, query values, status codes, and data payloads. The final response is generated by calling .end(value), which returns an ArrayBuffer.Methods available on the DeclarativeResponse class:
writeHeader(key, value): Appends a header instruction with 1-byte length values.writeBody(): Appends the body instruction.writeQueryValue(key): Appends a query value instruction with 1-byte length values.writeHeaderValue(key): Appends a header value instruction with 1-byte length values.write(value): Appends a data instruction with a 2-byte length value (max length 65535).writeParameterValue(key): Appends a parameter value instruction with 1-byte length values.writeStatus(status): Appends a status instruction with 1-byte length values.end(value): Appends a final instruction with a 2-byte length value and returns the resulting ArrayBuffer.