### Handle conflicting attribute configurations

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Examples demonstrating configurations that cause panics versus valid configurations.

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .generic_attributes(hashset!["rel"])
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .generic_attributes(hashset!["rel"])
    .link_rel(None)
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::{hashmap, hashset};

Builder::default()
    .generic_attributes(hashset!["class"])
    .allowed_classes(hashmap!["span" => hashset!["hidden"]])
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::{hashmap, hashset};

Builder::default()
    .allowed_classes(hashmap!["span" => hashset!["hidden"]])
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .clean_content_tags(hashset!["aside"])
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .rm_tags(&["aside"])
    .clean_content_tags(hashset!["aside"])
    .clean("");
```

--------------------------------

### Basic HTML Sanitization Example

Source: https://docs.rs/ammonia/latest/ammonia/fn.clean.html?search=

Demonstrates the removal of script tags from an input string using default settings.

```rust
assert_eq!(ammonia::clean("XSS<script>attack</script>"), "XSS")
```

--------------------------------

### Get host string representation

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the string representation of the host, handling punycode for non-ASCII domains and brackets for IPv6.

```rust
use url::Url;

let url = Url::parse("https://127.0.0.1/index.html")?;
assert_eq!(url.host_str(), Some("127.0.0.1"));

let url = Url::parse("https://subdomain.example.com")?;
assert_eq!(url.host_str(), Some("subdomain.example.com"));

let url = Url::parse("ftp://rms@example.com")?;
assert_eq!(url.host_str(), Some("example.com"));

let url = Url::parse("unix:/run/foo.socket")?;
assert_eq!(url.host_str(), None);

let url = Url::parse("data:text/plain,Stuff")?;
assert_eq!(url.host_str(), None);
```

--------------------------------

### Get URL Scheme

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the lower-cased ASCII scheme without the colon delimiter.

```rust
use url::Url;

let url = Url::parse("file:///tmp/foo")?;
assert_eq!(url.scheme(), "file");
```

--------------------------------

### Get domain name

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the domain name if the host is a domain, excluding IP addresses.

```rust
use url::Url;

let url = Url::parse("https://127.0.0.1/")?;
assert_eq!(url.domain(), None);

let url = Url::parse("mailto:rms@example.net")?;
assert_eq!(url.domain(), None);

let url = Url::parse("https://example.com/")?;
assert_eq!(url.domain(), Some("example.com"));

let url = Url::parse("https://subdomain.example.com/")?;
assert_eq!(url.domain(), Some("subdomain.example.com"));
```

--------------------------------

### Custom URL Evaluation

Source: https://docs.rs/ammonia/latest/ammonia/enum.UrlRelative.html

Example of using the Custom variant to provide a user-defined function for URL transformation.

```rust
use std::borrow::Cow;
fn is_absolute_path(url: &str) -> bool {
    let u = url.as_bytes();
    // `//a/b/c` is "protocol-relative", meaning "a" is a hostname
    // `/a/b/c` is an absolute path, and what we want to do stuff to.
    u.get(0) == Some(&b'/') && u.get(1) != Some(&b'/')
}
fn evaluate(url: &str) -> Option<Cow<str>> {
    if is_absolute_path(url) {
        Some(Cow::Owned(String::from("/root") + url))
    } else {
        Some(Cow::Borrowed(url))
    }
}
fn main() {
    let a = ammonia::Builder::new()
        .url_relative(ammonia::UrlRelative::Custom(Box::new(evaluate)))
        .clean("<a href=/test/path>fixed</a><a href=path>passed</a><a href=http://google.com/>skipped</a>")
        .to_string();
    assert_eq!(a, "<a href=\"/root/test/path\" rel=\"noopener noreferrer\">fixed</a><a href=\"path\" rel=\"noopener noreferrer\">passed</a><a href=\"http://google.com/\" rel=\"noopener noreferrer\">skipped</a>");
}
```

--------------------------------

### Get URL port

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the explicit port number, ignoring default ports.

```rust
use url::Url;

let url = Url::parse("https://example.com")?;
assert_eq!(url.port(), None);

let url = Url::parse("https://example.com:443/")?;
assert_eq!(url.port(), None);

let url = Url::parse("ssh://example.com:22")?;
assert_eq!(url.port(), Some(22));
```

--------------------------------

### Retrieving link relationship settings

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Gets the current link relationship attribute configuration.

```rust
use ammonia::{Builder, UrlRelative};
let mut a = Builder::default();
a.link_rel(Some("a b"));
assert_eq!(a.get_link_rel(), Some("a b"));
```

--------------------------------

### Construct new Builder

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Creates a Builder instance with default configuration options.

```rust
use ammonia::{Builder, Url, UrlRelative};

let input = "<!-- comments will be stripped -->This is an <a href=.>Ammonia</a> example using <a href=struct.Builder.html#method.new onclick=xss>the <code onmouseover=xss>new()</code> function</a>.";
let output = "This is an <a href=\"https://docs.rs/ammonia/1.0/ammonia/\" rel=\"noopener noreferrer\">Ammonia</a> example using <a href=\"https://docs.rs/ammonia/1.0/ammonia/struct.Builder.html#method.new\" rel=\"noopener noreferrer\">the <code>new()</code> function</a>.";

let result = Builder::new() // <--
    .url_relative(UrlRelative::RewriteWithBase(Url::parse("https://docs.rs/ammonia/1.0/ammonia/")?))
    .clean(input)
    .to_string();
assert_eq!(result, output);
```

--------------------------------

### pub fn password(&self) -> Option<&str>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the password for the URL, if any, as a percent-encoded ASCII string.

```APIDOC
## pub fn password(&self) -> Option<&str>

### Description
Returns the password for this URL, if any, as a percent-encoded ASCII string.
```

--------------------------------

### Builder::new()

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=u32+-%3E+bool

Constructs a new Builder instance with default configuration options.

```APIDOC
## pub fn new() -> Self

### Description
Constructs a `Builder` instance configured with the default options.
```

--------------------------------

### Get parsed host representation

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the parsed Host enum representation of the URL host.

```rust
use url::Url;

let url = Url::parse("https://127.0.0.1/index.html")?;
assert!(url.host().is_some());

let url = Url::parse("ftp://rms@example.com")?;
assert!(url.host().is_some());

let url = Url::parse("unix:/run/foo.socket")?;
assert!(url.host().is_none());

let url = Url::parse("data:text/plain,Stuff")?;
assert!(url.host().is_none());
```

--------------------------------

### Url::join

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Parses a string as a URL, using the current instance as the base URL.

```APIDOC
## pub fn join(&self, input: &str) -> Result<Url, ParseError>

### Description
Parses a string as an URL, with this URL as the base URL.

### Parameters
- **input** (&str) - The relative or absolute URL string to join with the base.

### Returns
- **Result<Url, ParseError>** - Returns the joined Url or a ParseError.
```

--------------------------------

### Get tag attribute value

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Retrieves the value currently set for a specific tag attribute.

```rust
let mut b = ammonia::Builder::default();
b.set_tag_attribute_value("a", "target", "_blank");
let value = b.get_set_tag_attribute_value("a", "target");
assert_eq!(value, Some("_blank"));
```

--------------------------------

### pub fn host(&self) -> Option<Host<&str>>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the parsed representation of the host for this URL.

```APIDOC
## pub fn host(&self) -> Option<Host<&str>>

### Description
Returns the parsed representation of the host for this URL. Non-ASCII domain labels are handled according to IDNA or percent-encoding rules.
```

--------------------------------

### Serialize URL to String

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the string representation of the URL.

```rust
use url::Url;

let url_str = "https://example.net/";
let url = Url::parse(url_str)?;
assert_eq!(url.as_str(), url_str);
```

--------------------------------

### pub fn host_str(&self) -> Option<&str>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the string representation of the host for this URL, if any.

```APIDOC
## pub fn host_str(&self) -> Option<&str>

### Description
Returns the string representation of the host (domain or IP address) for this URL, if any. Non-ASCII domains are punycode-encoded or percent-encoded depending on the URL type.
```

--------------------------------

### pub fn into_string(self) -> String

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=std%3A%3Avec

Returns the serialization of this URL. This consumes the Url and takes ownership of the String stored in it.

```APIDOC
## pub fn into_string(self) -> String

### Description
Returns the serialization of this URL. This consumes the `Url` and takes ownership of the `String` stored in it.

### Note
Deprecated since 2.3.0: use Into<String>.
```

--------------------------------

### Get port or known default

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the port number, including known defaults for common schemes like http and https.

```rust
use url::Url;

let url = Url::parse("foo://example.com")?;
assert_eq!(url.port_or_known_default(), None);

let url = Url::parse("foo://example.com:1456")?;
assert_eq!(url.port_or_known_default(), Some(1456));

let url = Url::parse("https://example.com")?;
assert_eq!(url.port_or_known_default(), Some(443));
```

--------------------------------

### pub fn from_directory_path<P>(path: P) -> Result<Url, ()>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Converts a directory path into a URL with a trailing slash.

```APIDOC
## pub fn from_directory_path<P>(path: P) -> Result<Url, ()>

### Description
Convert a directory name as `std::path::Path` into an URL in the `file` scheme. Ensures the URL path has a trailing slash to correctly handle base URL resolution.

### Parameters
- **path** (P) - Required - The directory path to convert.
```

--------------------------------

### Retrieve URL Path

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the percent-encoded ASCII path of the URL.

```rust
use url::{Url, ParseError};

let url = Url::parse("https://example.com/api/versions?page=2")?;
assert_eq!(url.path(), "/api/versions");

let url = Url::parse("https://example.com")?;
assert_eq!(url.path(), "/");

let url = Url::parse("https://example.com/countries/việt nam")?;
assert_eq!(url.path(), "/countries/vi%E1%BB%87t%20nam");
```

--------------------------------

### Convert URL to String

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Consumes the Url instance and returns the underlying String representation.

```rust
use url::Url;

let url_str = "https://example.net/";
let url = Url::parse(url_str)?;
assert_eq!(String::from(url), url_str);
```

--------------------------------

### pub fn cannot_be_a_base(&self) -> bool

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=std%3A%3Avec

Return whether this URL is a cannot-be-a-base URL.

```APIDOC
## pub fn cannot_be_a_base(&self) -> bool

### Description
Return whether this URL is a cannot-be-a-base URL, meaning that parsing a relative URL string with this URL as the base will return an error.
```

--------------------------------

### Add URL Schemes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Appends new URL schemes to the existing whitelist.

```rust
let a = ammonia::Builder::default()
    .add_url_schemes(&["my-scheme"])
    .clean("<a href=my-scheme:home>mess</span>").to_string();
assert_eq!("<a href=\"my-scheme:home\" rel=\"noopener noreferrer\">mess</a>", a);
```

--------------------------------

### Configure Tag Attribute Values

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=u32+-%3E+bool

Demonstrates setting and cleaning tag-specific attributes using the Builder.

```rust
let tags = hashset!["my-tag"];
let set_tag_attribute_values = hashmap![
    "my-tag" => hashmap![
        "my-attr" => "val",
    ],
];
let a = Builder::new().tags(tags).set_tag_attribute_values(set_tag_attribute_values)
    .clean("<my-tag>")
    .to_string();
assert_eq!(a, "<my-tag my-attr=\"val\"></my-tag>");
```

```rust
let a = ammonia::Builder::default()
    .add_tags(&["my-tag"])
    .set_tag_attribute_value("my-tag", "my-attr", "val")
    .clean("<my-tag>test</my-tag> <span>mess</span>").to_string();
assert_eq!("<my-tag my-attr=\"val\">test</my-tag> <span>mess</span>", a);
```

--------------------------------

### path

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the path for the URL as a percent-encoded ASCII string.

```APIDOC
## pub fn path(&self) -> &str

### Description
Return the path for this URL, as a percent-encoded ASCII string. For cannot-be-a-base URLs, this is an arbitrary string that doesn’t start with ‘/’.
```

--------------------------------

### pub fn has_host(&self) -> bool

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Checks if the URL has a host component.

```APIDOC
## pub fn has_host(&self) -> bool

### Description
Checks if the URL has a host component. This is equivalent to checking if the host is present.
```

--------------------------------

### Panic on Contradictory Link Settings

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html

Shows a configuration that triggers a panic due to conflicting link attribute settings.

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .generic_attributes(hashset!["rel"])
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .generic_attributes(hashset!["rel"])
    .link_rel(None)
    .clean("");
```

--------------------------------

### Create Relative URL

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Attempts to create a relative path from a base URL to a target URL.

```rust
use url::Url;

let base = Url::parse("https://example.net/a/b.html")?;
let url = Url::parse("https://example.net/a/c.png")?;
let relative = base.make_relative(&url);
assert_eq!(relative.as_ref().map(|s| s.as_str()), Some("c.png"));

let base = Url::parse("https://example.net/a/b/")?;
let url = Url::parse("https://example.net/a/b/c.png")?;
let relative = base.make_relative(&url);
assert_eq!(relative.as_ref().map(|s| s.as_str()), Some("c.png"));

let base = Url::parse("https://example.net/a/b/")?;
let url = Url::parse("https://example.net/a/d/c.png")?;
let relative = base.make_relative(&url);
assert_eq!(relative.as_ref().map(|s| s.as_str()), Some("../d/c.png"));

let base = Url::parse("https://example.net/a/b.html?c=d")?;
let url = Url::parse("https://example.net/a/b.html?e=f")?;
let relative = base.make_relative(&url);
assert_eq!(relative.as_ref().map(|s| s.as_str()), Some("?e=f"));
```

--------------------------------

### pub fn from_file_path<P>(path: P) -> Result<Url, ()>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Converts a file path into a URL using the 'file' scheme.

```APIDOC
## pub fn from_file_path<P>(path: P) -> Result<Url, ()>

### Description
Convert a file name as `std::path::Path` into an URL in the `file` scheme. Returns an error if the path is not absolute or, on Windows, if the prefix is not a disk or UNC prefix.

### Parameters
- **path** (P) - Required - The file path to convert.
```

--------------------------------

### pub fn username(&self) -> &str

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=std%3A%3Avec

Return the username for this URL as a percent-encoded ASCII string.

```APIDOC
## pub fn username(&self) -> &str

### Description
Return the username for this URL (typically the empty string) as a percent-encoded ASCII string.
```

--------------------------------

### Configure Generic Attributes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Demonstrates setting custom whitelisted attributes for HTML elements.

```rust
let attributes = hashset!["data-val"];
let a = Builder::new()
    .generic_attributes(attributes)
    .clean("<b data-val=1>")
    .to_string();
assert_eq!(a, "<b data=\"1\"></b>");
```

--------------------------------

### Convert Document to String using Display

Source: https://docs.rs/ammonia/latest/ammonia/struct.Document.html?search=

Demonstrates converting a cleaned Document to a String using the Display trait implementation.

```rust
use ammonia::Builder;

let input = "Some <style></style>HTML here";
let output = "Some HTML here";

let document = Builder::new()
    .clean(input);
assert_eq!(document.to_string(), output);
```

--------------------------------

### Configure Parse Options

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Uses ParseOptions to configure the URL parser, such as setting a base URL.

```rust
use url::Url;
let options = Url::options();
let api = Url::parse("https://api.example.com")?;
let base_url = options.base_url(Some(&api));
let version_url = base_url.parse("version.json")?;
assert_eq!(version_url.as_str(), "https://api.example.com/version.json");
```

--------------------------------

### pub fn port(&self) -> Option<u16>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the port number for this URL, if any.

```APIDOC
## pub fn port(&self) -> Option<u16>

### Description
Return the port number for this URL, if any. Note that default port numbers are not reflected in the serialization.
```

--------------------------------

### Retrieve Query String

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the URL query string as a percent-encoded ASCII string.

```rust
use url::Url;

fn run() -> Result<(), ParseError> {
let url = Url::parse("https://example.com/products?page=2")?;
let query = url.query();
assert_eq!(query, Some("page=2"));

let url = Url::parse("https://example.com/products")?;
let query = url.query();
assert!(query.is_none());

let url = Url::parse("https://example.com/?country=español")?;
let query = url.query();
assert_eq!(query, Some("country=espa%C3%B1ol"));
```

--------------------------------

### Configure Generic Attributes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=std%3A%3Avec

Demonstrates setting generic attributes on the builder.

```rust
let attributes = hashset!["data-val"];
let a = Builder::new()
    .generic_attributes(attributes)
    .clean("<b data-val=1>")
    .to_string();
assert_eq!(a, "<b data-val=\"1\"></b>");
```

--------------------------------

### Configure Generic Attribute Prefixes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=u32+-%3E+bool

Methods for setting, adding, removing, and cloning whitelisted attribute prefixes.

```rust
use ammonia::Builder;
use maplit::hashset;

let prefixes = hashset!["data-"];
let a = Builder::new()
    .generic_attribute_prefixes(prefixes)
    .clean("<b data-val=1>")
    .to_string();
assert_eq!(a, "<b data-val=\"1\"></b>");
```

```rust
let a = ammonia::Builder::default()
    .add_generic_attribute_prefixes(&["my-"])
    .clean("<span my-attr>mess</span>").to_string();
assert_eq!("<span my-attr=\"\">mess</span>", a);
```

```rust
let a = ammonia::Builder::default()
    .add_generic_attribute_prefixes(&["data-", "code-"])
    .rm_generic_attribute_prefixes(&["data-"])
    .clean("<span code-test=\"foo\" data-test=\"cool\"></span>").to_string();
assert_eq!("<span code-test=\"foo\"></span>", a);
```

```rust
use maplit::hashset;

let generic_attribute_prefixes = hashset!["my-prfx-1-", "my-prfx-2-"];

let mut b = ammonia::Builder::default();
b.generic_attribute_prefixes(Clone::clone(&generic_attribute_prefixes));
assert_eq!(Some(generic_attribute_prefixes), b.clone_generic_attribute_prefixes());
```

--------------------------------

### Construct empty Builder

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Creates a Builder instance with no allowed tags.

```rust
use ammonia::{Builder, Url, UrlRelative};

let input = "<!-- comments will be stripped -->This is an <a href=.>Ammonia</a> example using <a href=struct.Builder.html#method.new onclick=xss>the <code onmouseover=xss>empty()</code> function</a>.";
let output = "This is an Ammonia example using the empty() function.";
```

--------------------------------

### Panic on Contradictory Class Settings

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html

Shows a configuration that triggers a panic due to conflicting class attribute settings.

```rust
use ammonia::Builder;
use maplit::{hashmap, hashset};

Builder::default()
    .generic_attributes(hashset!["class"])
    .allowed_classes(hashmap!["span" => hashset!["hidden"]])
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::{hashmap, hashset};

Builder::default()
    .allowed_classes(hashmap!["span" => hashset!["hidden"]])
    .clean("");
```

--------------------------------

### Sanitize HTML with Builder

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Demonstrates sanitizing an HTML fragment using the Builder configuration, including URL rewriting.

```rust
let result = Builder::empty() // <--
    .url_relative(UrlRelative::RewriteWithBase(Url::parse("https://docs.rs/ammonia/1.0/ammonia/")?))
    .clean(input)
    .to_string();
assert_eq!(result, output);
```

```rust
use ammonia::{Builder, Url, UrlRelative};

let input = "<!-- comments will be stripped -->This is an <a href=.>Ammonia</a> example using <a href=struct.Builder.html#method.new onclick=xss>the <code onmouseover=xss>new()</code> function</a>.";
let output = "This is an <a href=\"https://docs.rs/ammonia/1.0/ammonia/\" rel=\"noopener noreferrer\">Ammonia</a> example using <a href=\"https://docs.rs/ammonia/1.0/ammonia/struct.Builder.html#method.new\" rel=\"noopener noreferrer\">the <code>new()</code> function</a>.";

let result = Builder::new()
    .url_relative(UrlRelative::RewriteWithBase(Url::parse("https://docs.rs/ammonia/1.0/ammonia/")?))
    .clean(input)
    .to_string(); // <--
assert_eq!(result, output);
```

--------------------------------

### Parse URL with Parameters

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Parses a URL and appends query parameters without removing existing ones.

```rust
use url::Url;

let url = Url::parse_with_params("https://example.net?dont=clobberme",
                                 &[("lang", "rust"), ("browser", "servo")])?;
assert_eq!("https://example.net/?dont=clobberme&lang=rust&browser=servo", url.as_str());
```

--------------------------------

### from_str

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=Option%3CT%3E%2C+%28T+-%3E+U%29+-%3E+Option%3CU%3E

Parses a string into a Url object.

```APIDOC
## fn from_str(input: &str) -> Result<Url, ParseError>

### Description
Parses a string slice into a `Url` instance without requiring a base URL or encoding override.

### Parameters
- **input** (str) - The string to parse as a URL.

### Returns
- **Result<Url, ParseError>** - The parsed URL or a parsing error.
```

--------------------------------

### Configure allowed tags

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Methods for managing the whitelist of allowed HTML tags.

```rust
use ammonia::Builder;
use maplit::hashset;

let tags = hashset!["my-tag"];
let a = Builder::new()
    .tags(tags)
    .clean("<my-tag>")
    .to_string();
assert_eq!(a, "<my-tag></my-tag>");
```

```rust
let a = ammonia::Builder::default()
    .add_tags(&["my-tag"])
    .clean("<my-tag>test</my-tag> <span>mess</span>").to_string();
assert_eq!("<my-tag>test</my-tag> <span>mess</span>", a);
```

```rust
let a = ammonia::Builder::default()
    .rm_tags(&["span"])
    .clean("<span></span>").to_string();
assert_eq!("", a);
```

```rust
use maplit::hashset;

let tags = hashset!["my-tag-1", "my-tag-2"];
```

--------------------------------

### Builder::empty()

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=u32+-%3E+bool

Constructs a Builder instance with no allowed tags.

```APIDOC
## pub fn empty() -> Self

### Description
Constructs a `Builder` instance configured with no allowed tags.
```

--------------------------------

### Retrieve URL Origin

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the origin of the URL. Note that file URLs return an opaque origin.

```rust
use url::{Host, Origin, Url};

let url = Url::parse("ftp://example.com/foo")?;
assert_eq!(url.origin(),
           Origin::Tuple("ftp".into(),
                         Host::Domain("example.com".into()),
                         21));
```

```rust
use url::{Host, Origin, Url};

let url = Url::parse("blob:https://example.com/foo")?;
assert_eq!(url.origin(),
           Origin::Tuple("https".into(),
                         Host::Domain("example.com".into()),
                         443));
```

```rust
use url::{Host, Origin, Url};

let url = Url::parse("file:///tmp/foo")?;
assert!(!url.origin().is_tuple());

let other_url = Url::parse("file:///tmp/foo")?;
assert!(url.origin() != other_url.origin());
```

```rust
use url::{Host, Origin, Url};

let url = Url::parse("foo:bar")?;
assert!(!url.origin().is_tuple());
```

--------------------------------

### pub fn domain(&self) -> Option<&str>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the domain name if the URL has a host and it is a domain name.

```APIDOC
## pub fn domain(&self) -> Option<&str>

### Description
If this URL has a host and it is a domain name (not an IP address), return it. Non-ASCII domains are encoded appropriately.
```

--------------------------------

### Configure URL Schemes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Sets the permitted URL schemes for href and src attributes.

```rust
use ammonia::Builder;
use maplit::hashset;

let url_schemes = hashset![
    "http", "https", "mailto", "magnet"
];
let a = Builder::new().url_schemes(url_schemes)
    .clean("<a href=\"magnet:?xt=urn:ed2k:31D6CFE0D16AE931B73C59D7E0C089C0&xl=0&dn=zero_len.fil&xt=urn:bitprint:3I42H3S6NNFQ2MSVX7XZKYAYSCX5QBYJ.LWPNACQDBZRYXW3VHJVCJ64QBZNGHOHHHZWCLNQ&xt=urn:md5:D41D8CD98F00B204E9800998ECF8427E\">zero-length file</a>")
    .to_string();

// See `link_rel` for information on the rel=\"noopener noreferrer\" attribute
// in the cleaned HTML.
assert_eq!(a,
  "<a href=\"magnet:?xt=urn:ed2k:31D6CFE0D16AE931B73C59D7E0C089C0&amp;xl=0&amp;dn=zero_len.fil&amp;xt=urn:bitprint:3I42H3S6NNFQ2MSVX7XZKYAYSCX5QBYJ.LWPNACQDBZRYXW3VHJVCJ64QBZNGHOHHHZWCLNQ&amp;xt=urn:md5:D41D8CD98F00B204E9800998ECF8427E\" rel=\"noopener noreferrer\">zero-length file</a>");
```

--------------------------------

### Parse URL from String

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Parses an absolute URL from a string, returning a Result.

```rust
use url::Url;

let url = Url::parse("https://example.net")?;
```

--------------------------------

### Url::join

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=Option%3CT%3E%2C+%28T+-%3E+U%29+-%3E+Option%3CU%3E

Resolves a relative URL against a base URL.

```APIDOC
## pub fn join(&self, input: &str) -> Result<Url, ParseError>

### Description
Parses a string as a URL, using the current instance as the base URL. The behavior depends on whether the base URL has a trailing slash.
```

--------------------------------

### Configure Allowed Tags

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html

Sets a specific whitelist of allowed tags.

```rust
use ammonia::Builder;
use maplit::hashset;

let tags = hashset!["my-tag"];
let a = Builder::new()
    .tags(tags)
    .clean("<my-tag>")
    .to_string();
assert_eq!(a, "<my-tag></my-tag>");
```

--------------------------------

### pub fn port_or_known_default(&self) -> Option<u16>

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the port number for this URL, or the default port number if it is known.

```APIDOC
## pub fn port_or_known_default(&self) -> Option<u16>

### Description
Return the port number for this URL, or the default port number if it is known. This method supports http, https, ws, wss, and ftp schemes.
```

--------------------------------

### Configure allowed classes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Sets the allowed classes for specific tags using a hashmap of hashsets.

```rust
let allowed_classes = hashmap![
    "code" => hashset!["rs", "ex", "c", "cxx", "js"]
];
let a = Builder::new()
    .allowed_classes(allowed_classes)
    .clean("<code class=rs>fn main() {}</code>")
    .to_string();
assert_eq!(
  a,
  "<code class=\"rs\">fn main() {}</code>");
```

--------------------------------

### Add Additional Whitelisted Tags

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html

Appends new tags to the existing whitelist.

```rust
let a = ammonia::Builder::default()
    .add_tags(&["my-tag"])
    .clean("<my-tag>test</my-tag> <span>mess</span>").to_string();
assert_eq!("<my-tag>test</my-tag> <span>mess</span>", a);
```

--------------------------------

### pub fn scheme(&self) -> &str

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=std%3A%3Avec

Return the scheme of this URL, lower-cased, as an ASCII string without the ‘:’ delimiter.

```APIDOC
## pub fn scheme(&self) -> &str

### Description
Return the scheme of this URL, lower-cased, as an ASCII string without the ‘:’ delimiter.
```

--------------------------------

### Set URL Path

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Updates the URL path. The method automatically handles percent-encoding for non-encoded strings.

```rust
use url::Url;

let mut url = Url::parse("https://example.com")?;
url.set_path("api/comments");
assert_eq!(url.as_str(), "https://example.com/api/comments");
assert_eq!(url.path(), "/api/comments");

let mut url = Url::parse("https://example.com/api")?;
url.set_path("data/report.csv");
assert_eq!(url.as_str(), "https://example.com/data/report.csv");
assert_eq!(url.path(), "/data/report.csv");

// `set_path` percent-encodes the given string if it's not already percent-encoded.
let mut url = Url::parse("https://example.com")?;
url.set_path("api/some comments");
assert_eq!(url.as_str(), "https://example.com/api/some%20comments");
assert_eq!(url.path(), "/api/some%20comments");

// `set_path` will not double percent-encode the string if it's already percent-encoded.
let mut url = Url::parse("https://example.com")?;
url.set_path("api/some%20comments");
assert_eq!(url.as_str(), "https://example.com/api/some%20comments");
assert_eq!(url.path(), "/api/some%20comments");
```

--------------------------------

### from_str

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Parses a string as a URL without a base URL or encoding override.

```APIDOC
## fn from_str(input: &str) -> Result<Url, ParseError>

### Description
Parses a string s to return a value of this type.

### Parameters
- input (str): The string to parse as a URL.

### Returns
- Result<Url, ParseError>: Returns the parsed Url or a ParseError if parsing fails.
```

--------------------------------

### Cloning Tag Configuration

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=std%3A%3Avec

Retrieving a copy of the current whitelisted tags.

```rust
use maplit::hashset;

let tags = hashset!["my-tag-1", "my-tag-2"];
```

--------------------------------

### URL Relative Resolver Status Methods

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Methods to check the current configuration of the relative URL resolver.

```APIDOC
## is_url_relative_deny
Returns `true` if the relative URL resolver is set to `Deny`.

## is_url_relative_pass_through
Returns `true` if the relative URL resolver is set to `PassThrough`.

## is_url_relative_custom
Returns `true` if the relative URL resolver is set to `Custom`.
```

--------------------------------

### Configure clean-content tags

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Sets the tags whose contents will be completely removed from the output. Adding tags that are already whitelisted will cause a panic.

```rust
use ammonia::Builder;
use maplit::hashset;

let tag_blacklist = hashset!["script", "style"];
let a = Builder::new()
    .clean_content_tags(tag_blacklist)
    .clean("<script>alert('hello')</script><style>a { background: #fff }</style>")
    .to_string();
assert_eq!(a, "");
```

--------------------------------

### pub fn clean(&self, src: &str) -> Document

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=Option%3CT%3E%2C+%28T+-%3E+U%29+-%3E+Option%3CU%3E

Sanitizes an HTML fragment in a string according to the configured options.

```APIDOC
## pub fn clean(&self, src: &str) -> Document

### Description
Sanitizes an HTML fragment in a string according to the configured options.

### Parameters
- **src** (&str) - The HTML fragment string to sanitize.

### Returns
- **Document** - The sanitized HTML document.
```

--------------------------------

### Manage Clean Content Tags

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=Option%3CT%3E%2C+%28T+-%3E+U%29+-%3E+Option%3CU%3E

Methods for setting, adding, removing, and cloning tags whose contents should be stripped from the output.

```rust
use ammonia::Builder;
use maplit::hashset;

let tag_blacklist = hashset!["script", "style"];
let a = Builder::new()
    .clean_content_tags(tag_blacklist)
    .clean("<script>alert('hello')</script><style>a { background: #fff }</style>")
    .to_string();
assert_eq!(a, "");
```

```rust
let a = ammonia::Builder::default()
    .add_clean_content_tags(&["my-tag"])
    .clean("<my-tag>test</my-tag><span>mess</span>").to_string();
assert_eq!("<span>mess</span>", a);
```

```rust
use ammonia::Builder;
use maplit::hashset;

let tag_blacklist = hashset!["script"];
let a = ammonia::Builder::default()
    .clean_content_tags(tag_blacklist)
    .rm_clean_content_tags(&["script"])
    .clean("<script>XSS</script>").to_string();
assert_eq!("XSS", a);
```

```rust

let tags = hashset!["my-tag-1", "my-tag-2"];

let mut b = ammonia::Builder::default();
b.clean_content_tags(Clone::clone(&tags));
assert_eq!(tags, b.clone_clean_content_tags());
```

--------------------------------

### Panic on Contradictory Tag Settings

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html

Shows a configuration that triggers a panic due to conflicting tag whitelist and blacklist settings.

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .clean_content_tags(hashset!["aside"])
    .clean("");
```

```rust
use ammonia::Builder;
use maplit::hashset;

Builder::default()
    .rm_tags(&["aside"])
    .clean_content_tags(hashset!["aside"])
    .clean("");
```

--------------------------------

### Add generic attribute prefixes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Appends new whitelisted attribute prefixes to the existing configuration.

```rust
let a = ammonia::Builder::default()
    .add_generic_attribute_prefixes(&["my-"])
    .clean("<span my-attr>mess</span>").to_string();
assert_eq!("<span my-attr=\"\">mess</span>", a);
```

--------------------------------

### Join URLs

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Resolves a relative URL against a base URL. Note that trailing slashes in the base URL affect path resolution.

```rust
use url::Url;

// Base without a trailing slash
let base = Url::parse("https://example.net/a/b.html")?;
let url = base.join("c.png")?;
assert_eq!(url.as_str(), "https://example.net/a/c.png");  // Not /a/b.html/c.png

// Base with a trailing slash
let base = Url::parse("https://example.net/a/b/")?;
let url = base.join("c.png")?;
assert_eq!(url.as_str(), "https://example.net/a/b/c.png");

// Input as scheme relative special URL
let base = Url::parse("https://alice.com/a")?;
let url = base.join("//eve.com/b")?;
assert_eq!(url.as_str(), "https://eve.com/b");

// Input as base url relative special URL
let base = Url::parse("https://alice.com/a")?;
let url = base.join("/v1/meta")?;
assert_eq!(url.as_str(), "https://alice.com/v1/meta");

// Input as absolute URL
let base = Url::parse("https://alice.com/a")?;
let url = base.join("http://eve.com/b")?;
assert_eq!(url.as_str(), "http://eve.com/b");  // http instead of https
```

--------------------------------

### query

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the URL’s query string as a percent-encoded ASCII string.

```APIDOC
## pub fn query(&self) -> Option<&str>

### Description
Return this URL’s query string, if any, as a percent-encoded ASCII string.
```

--------------------------------

### Retrieve URL Username

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the percent-encoded username component of the URL.

```rust
use url::Url;

let url = Url::parse("ftp://rms@example.com")?;
assert_eq!(url.username(), "rms");

let url = Url::parse("ftp://:secret123@example.com")?;
assert_eq!(url.username(), "");

let url = Url::parse("https://example.com")?;
assert_eq!(url.username(), "");
```

--------------------------------

### pub fn is_special(&self) -> bool

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=std%3A%3Avec

Return whether the URL is special (has a special scheme).

```APIDOC
## pub fn is_special(&self) -> bool

### Description
Return whether the URL is special (has a special scheme).
```

--------------------------------

### pub fn clean(src: &str) -> String

Source: https://docs.rs/ammonia/latest/ammonia/fn.clean.html?search=std%3A%3Avec

Sanitizes an HTML string using a conservative set of default security rules.

```APIDOC
## pub fn clean(src: &str) -> String

### Description
Cleans HTML input with a conservative set of defaults. It strips script and style tags, blocks class attributes, and enforces security policies on links.

### Parameters
- **src** (&str) - The input HTML string to be cleaned.

### Returns
- **String** - The sanitized HTML string.

### Example
```rust
use ammonia::clean;

let input = "XSS<script>attack</script>";
let output = clean(input);
assert_eq!(output, "XSS");
```
```

--------------------------------

### Set URL Query String

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Updates the query string of a URL. Passing None clears the existing query.

```rust
use url::Url;

let mut url = Url::parse("https://example.com/products")?;
assert_eq!(url.as_str(), "https://example.com/products");

url.set_query(Some("page=2"));
assert_eq!(url.as_str(), "https://example.com/products?page=2");
assert_eq!(url.query(), Some("page=2"));
```

--------------------------------

### Clone URL Schemes

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Retrieves a copy of the current URL scheme whitelist.

```rust
use maplit::hashset;

let url_schemes = hashset!["my-scheme-1", "my-scheme-2"];

let mut b = ammonia::Builder::default();
b.url_schemes(Clone::clone(&url_schemes));
assert_eq!(url_schemes, b.clone_url_schemes());
```

--------------------------------

### Retrieve URL Authority

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the authority component as an ASCII string, handling punycode or percent-encoding as necessary.

```rust
use url::Url;

let url = Url::parse("unix:/run/foo.socket")?;
assert_eq!(url.authority(), "");
let url = Url::parse("file:///tmp/foo")?;
assert_eq!(url.authority(), "");
let url = Url::parse("https://user:password@example.com/tmp/foo")?;
assert_eq!(url.authority(), "user:password@example.com");
let url = Url::parse("irc://àlex.рф.example.com:6667/foo")?;
assert_eq!(url.authority(), "%C3%A0lex.%D1%80%D1%84.example.com:6667");
let url = Url::parse("http://àlex.рф.example.com:80/foo")?;
assert_eq!(url.authority(), "xn--lex-8ka.xn--p1ai.example.com");
```

--------------------------------

### Convert File Path to URL

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Converts a file system path to a file scheme URL. Requires the std feature and absolute paths.

```rust
use url::Url;

let url = Url::from_file_path("/tmp/foo.txt")?;
assert_eq!(url.as_str(), "file:///tmp/foo.txt");

let url = Url::from_file_path("../foo.txt");
assert!(url.is_err());

let url = Url::from_file_path("https://google.com/");
assert!(url.is_err());
```

--------------------------------

### ammonia::clean

Source: https://docs.rs/ammonia/latest/ammonia/fn.clean.html?search=Option%3CT%3E%2C+%28T+-%3E+U%29+-%3E+Option%3CU%3E

Sanitizes an HTML string using default security configurations.

```APIDOC
## pub fn clean(src: &str) -> String

### Description
Cleans HTML input with a conservative set of defaults. It strips dangerous tags like `script` and `style`, blocks `class` attributes, and enforces security attributes on links.

### Parameters
- **src** (&str) - The raw HTML string to be cleaned.

### Returns
- **String** - The sanitized HTML string.

### Example
```rust
assert_eq!(ammonia::clean("XSS<script>attack</script>"), "XSS");
```
```

--------------------------------

### Set ID prefix

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Prepends a string to all ID attribute values.

```rust
use ammonia::Builder;
use maplit::hashset;

let attributes = hashset!["id"];
let a = Builder::new()
    .generic_attributes(attributes)
    .id_prefix(Some("safe-"))
    .clean("<b id=42>")
    .to_string();
assert_eq!(a, "<b id=\"safe-42\"></b>");
```

--------------------------------

### origin

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html

Returns the origin of the URL.

```APIDOC
## pub fn origin(&self) -> Origin

### Description
Return the origin of this URL. Note: this returns an opaque origin for `file:` URLs.
```

--------------------------------

### add_tags

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Adds additional whitelisted tags to the existing configuration without overwriting previous settings.

```APIDOC
## pub fn add_tags<T: 'a + ?Sized + Borrow<str>, I: IntoIter<Item = &'a T>>( &mut self, it: I, ) -> &mut Self

### Description
Add additional whitelisted tags without overwriting old ones. Does nothing if the tag is already there.
```

--------------------------------

### Convert URL to file path

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Converts a URL to an absolute path. Ensure the URL scheme is checked before calling this method.

```rust
let path = url.to_file_path();
```

--------------------------------

### Url::as_str

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Returns the string serialization of the URL.

```APIDOC
## pub fn as_str(&self) -> &str

### Description
Return the serialization of this URL.

### Returns
- **&str** - The serialized URL string.
```

--------------------------------

### clean

Source: https://docs.rs/ammonia/latest/ammonia/struct.Builder.html?search=

Sanitizes an HTML fragment in a string according to the configured options.

```APIDOC
## pub fn clean(&self, src: &str) -> Document

### Description
Sanitizes an HTML fragment in a string according to the configured options.

### Parameters
- **src** (&str) - Required - The HTML fragment string to sanitize.

### Returns
- **Document** - The sanitized HTML document.
```

--------------------------------

### to_file_path

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=u32+-%3E+bool

Converts the URL path to an absolute std::path::Path, assuming the URL is in the file scheme.

```APIDOC
## pub fn to_file_path(&self) -> Result<PathBuf, ()>

### Description
Assuming the URL is in the file scheme or similar, convert its path to an absolute std::path::Path. Note that this does not check the URL scheme and may give nonsensical results for other schemes.

### Returns
- Result<PathBuf, ()>: Returns the path on success, or an error if the host is invalid or the path cannot be converted.
```

--------------------------------

### set_path

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html?search=std%3A%3Avec

Changes the URL's path component.

```APIDOC
## pub fn set_path(&mut self, path: &str)

### Description
Change this URL’s path. This method will percent-encode the string if it is not already encoded.

### Parameters
- **path** (&str) - The new path string.
```

--------------------------------

### from_directory_path

Source: https://docs.rs/ammonia/latest/ammonia/struct.Url.html

Converts a directory path into a URL with the 'file' scheme, ensuring a trailing slash.

```APIDOC
## pub fn from_directory_path<P>(path: P) -> Result<Url, ()>

### Description
Convert a directory name as `std::path::Path` into an URL in the `file` scheme. This ensures the URL path has a trailing slash, which is important when using the URL as a base. This method requires the `std` Cargo feature.

### Parameters
- **path** (P) - Required - The absolute directory path to convert.

### Returns
- **Result<Url, ()>** - Returns the URL on success, or Err(()) if the path is not absolute or has an invalid prefix.
```