URI Template

This is an implementation of RFC 6570 - URI Template.

• Supports Level 4
• Separate parse and expand steps
  • More efficient expansion
  • Introspect a template
  • Validate that a template is correct without expanding
• Partially expand template with incomplete data
• Detailed error messaging

Installation

npm install @hyperjump/uri-template

Usage

const UriTemplate = require("@hyperjump/uri-template");


// Parse and expand in one step
UriTemplate.expand("/foo{?foo,bar}", { foo: "aaa", bar: "bbb" }); // => /foo?foo=aaa&bar=bbb

// Parse a URI Template
const template = UriTemplate.parse("/foo{?foo,bar}");

// Expand a URI Template from the pre-parsed template
UriTemplate.expand(template, { foo: "aaa", bar: "bbb" }); // => /foo?foo=aaa&bar=bbb
UriTemplate.expand(template, { foo: "ccc", bar: "ddd" }); // => /foo?foo=ccc&bar=ddd

// Convert a parsed template back into a string
UriTemplate.stringify(template); // => /foo{?foo,bar}

// Partially expand template with incomplete data
const template = UriTemplate.expandPartial("/foo/{foo}{?bar}", { foo: "aaa" });
UriTemplate.stringify(template); // => /foo/aaa{?bar}
UriTemplate.expand(template, { bar: "bbb" }); // => /foo/aaa?bar=bbb

API

• parse: (string) => Template

  Parse a URI Template

• expand: (Template | string, Object) => string

  Expand a URI template. The first argument can either be a URI Template AST (the result of parse) or a URI Template string.

• expandPartial: (Template | string, Object) => Template

  Partially expand a URI template. This function will expand the expressions using the data passed, but it will skip any expressions it doesn't have defined data for. The first argument can either be a URI Template AST (the result of parse) or a URI Template string. The result is a URI Template AST.

• stringify: (Template) => string

  Convert a URI Template AST back into a URI Template string

• Template: array

  An AST representing URI Template

Contributing

Tests

Run the tests

npm test

Run the tests with a continuous test runner

npm test -- --watch