http-url

A focused builder for HTTP/HTTPS URLs, powered by the url crate.

http-url does not reimplement URL parsing. Parsing, percent-encoding, IDNA normalization and relative-reference resolution are all delegated to url (the WHATWG URL Standard implementation). What this crate adds on top is:

• a fluent HttpUrlBuilder for assembling URLs programmatically,
• an HttpUrl value type that enforces the "scheme is http or https" invariant, with a typed Scheme accessor.

Component access (host, path, query, fragment, …) is provided directly by url::Url via HttpUrl::as_url; this crate does not re-wrap those getters.

Features

• Fluent HTTP/HTTPS URL builder
• HttpUrl as a typed, scheme-restricted newtype over url::Url
• no_std + alloc support

Quick Start

[dependencies]
http-url = "0.2"

use http_url::{HttpUrl, Scheme};

// Build
let http_url = HttpUrl::builder()
    .scheme(Scheme::Https)
    .host("api.example.com")
    .add_path_segment("v1")
    .add_path_segment("users")
    .add_query_parameter("id", "42")
    .build()
    .unwrap();

assert_eq!(http_url.to_string(), "https://api.example.com/v1/users?id=42");

// Parse (delegated to the `url` crate). Only http/https are accepted.
let http_url = HttpUrl::parse("https://user:pass@example.com:8080/path/to?a=1&b=2#frag").unwrap();

assert_eq!(http_url.scheme(), "https");

// Reach the full url::Url API for component access.
let url = http_url.as_url();
assert_eq!(url.username(), "user");
assert_eq!(url.password(), Some("pass"));
assert_eq!(url.host_str(), Some("example.com"));
assert_eq!(url.port(), Some(8080));
assert_eq!(url.path(), "/path/to");
assert_eq!(url.query(), Some("a=1&b=2"));
assert_eq!(url.fragment(), Some("frag"));

Builder API

HttpUrl::builder()
    .scheme(Scheme::Https)              // Scheme::Http | Scheme::Https
    .username("user")                   // optional
    .password("pass")                   // optional
    .host("example.com")                // domain, IPv4, or [IPv6]
    .port(8080)                         // optional, uses scheme default otherwise
    .remove_port()                      // revert to scheme default
    .add_path_segment("api")            // decoded segment (auto-encoded)
    .add_path_segment("v1")
    .add_path_segments(&["a", "b"])     // multiple segments at once
    .set_path("/a/b/c")                 // replace entire path (decoded)
    .add_query_parameter("key", "val")  // decoded form
    .remove_query_parameter("key")      // remove all with this name
    .clear_query_parameters()           // remove all
    .fragment("section")                // decoded fragment
    .remove_fragment()                  // clear fragment
    .build_url()                        // -> url::Url
    .unwrap();
// or .build() -> HttpUrl

All components are stored in decoded form on the builder and handed to url::Url on build() / build_url(), which performs percent-encoding and normalization.

Modifying an existing URL

A builder can be started from a parsed URL — a string, an url::Url, or an existing HttpUrl — and then modified:

use http_url::{HttpUrl, HttpUrlBuilder};

// From a string
let url = HttpUrlBuilder::parse("https://example.com/a/b?x=1")
    .unwrap()
    .add_path_segment("c")
    .add_query_parameter("y", "2")
    .build()
    .unwrap();
assert_eq!(url.to_string(), "https://example.com/a/b/c?x=1&y=2");

// From an existing HttpUrl
let url = HttpUrl::parse("https://example.com/a/b?x=1").unwrap();
let url2 = url.new_builder()
    .add_path_segment("c")
    .build()
    .unwrap();
assert_eq!(url2.to_string(), "https://example.com/a/b/c?x=1");

url Crate Interop

url is a required dependency, and HttpUrl is a thin newtype over url::Url. Use the conversion methods to move between the two:

use http_url::HttpUrl;

// url::Url → HttpUrl (fallible, only http/https)
let u = url::Url::parse("https://example.com/path").unwrap();
let http_url = HttpUrl::try_from(u.clone()).unwrap();
assert_eq!(http_url.as_url(), &u);

// HttpUrl → url::Url (infallible, move)
let url: url::Url = http_url.into();
assert_eq!(url, u);

Feature Flags

Feature	Default	Description
std	✅	Enables std::error::Error impl via thiserror

no_std

The crate works without std, requiring only alloc:

[dependencies]
http-url = { version = "0.2", default-features = false }

The underlying url crate is itself no_std + alloc compatible.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)

at your option.