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use {Uri, Result}; | ||
use convert::{HttpTryFrom, HttpTryInto}; | ||
use super::{Authority, Scheme, Parts, PathAndQuery}; | ||
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/// A builder for `Uri`s. | ||
/// | ||
/// This type can be used to construct an instance of `Uri` | ||
/// through a builder pattern. | ||
#[derive(Debug)] | ||
pub struct Builder { | ||
parts: Option<Result<Parts>>, | ||
} | ||
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impl Builder { | ||
/// Creates a new default instance of `Builder` to construct a `Uri`. | ||
/// | ||
/// # Examples | ||
/// | ||
/// ``` | ||
/// # use http::*; | ||
/// | ||
/// let uri = uri::Builder::new() | ||
/// .scheme("https") | ||
/// .authority("hyper.rs") | ||
/// .path_and_query("/") | ||
/// .build() | ||
/// .unwrap(); | ||
/// ``` | ||
#[inline] | ||
pub fn new() -> Builder { | ||
Builder::default() | ||
} | ||
|
||
/// Set the `Scheme` for this URI. | ||
/// | ||
/// # Examples | ||
/// | ||
/// ``` | ||
/// # use http::*; | ||
/// | ||
/// let mut builder = uri::Builder::new(); | ||
/// builder.scheme("https"); | ||
/// ``` | ||
pub fn scheme<T>(&mut self, scheme: T) -> &mut Self | ||
where | ||
Scheme: HttpTryFrom<T>, | ||
{ | ||
self.map(|parts| { | ||
parts.scheme = Some(scheme.http_try_into()?); | ||
Ok(()) | ||
}) | ||
} | ||
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||
/// Set the `Authority` for this URI. | ||
/// | ||
/// # Examples | ||
/// | ||
/// ``` | ||
/// # use http::*; | ||
/// | ||
/// let uri = uri::Builder::new() | ||
/// .authority("tokio.rs") | ||
/// .build() | ||
/// .unwrap(); | ||
/// ``` | ||
pub fn authority<T>(&mut self, auth: T) -> &mut Self | ||
where | ||
Authority: HttpTryFrom<T>, | ||
{ | ||
self.map(|parts| { | ||
parts.authority = Some(auth.http_try_into()?); | ||
Ok(()) | ||
}) | ||
} | ||
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/// Set the `PathAndQuery` for this URI. | ||
/// | ||
/// # Examples | ||
/// | ||
/// ``` | ||
/// # use http::*; | ||
/// | ||
/// let uri = uri::Builder::new() | ||
/// .path_and_query("/hello?foo=bar") | ||
/// .build() | ||
/// .unwrap(); | ||
/// ``` | ||
pub fn path_and_query<T>(&mut self, p_and_q: T) -> &mut Self | ||
where | ||
PathAndQuery: HttpTryFrom<T>, | ||
{ | ||
self.map(|parts| { | ||
parts.path_and_query = Some(p_and_q.http_try_into()?); | ||
Ok(()) | ||
}) | ||
} | ||
|
||
/// Consumes this builder, and tries to construct a valid `Uri` from | ||
/// the configured pieces. | ||
/// | ||
/// # Errors | ||
/// | ||
/// This function may return an error if any previously configured argument | ||
/// failed to parse or get converted to the internal representation. For | ||
/// example if an invalid `scheme` was specified via `scheme("!@#%/^")` | ||
/// the error will be returned when this function is called rather than | ||
/// when `scheme` was called. | ||
/// | ||
/// Additionally, the various forms of URI require certain combinations of | ||
/// parts to be set to be valid. If the parts don't fit into any of the | ||
/// valid forms of URI, a new error is returned. | ||
/// | ||
/// # Examples | ||
/// | ||
/// ``` | ||
/// # use http::*; | ||
/// | ||
/// let uri = Uri::builder() | ||
/// .build() | ||
/// .unwrap(); | ||
/// ``` | ||
pub fn build(&mut self) -> Result<Uri> { | ||
self | ||
.parts | ||
.take() | ||
.expect("cannot reuse Uri builder") | ||
.and_then(|parts| parts.http_try_into()) | ||
} | ||
|
||
fn map<F>(&mut self, f: F) -> &mut Self | ||
where | ||
F: FnOnce(&mut Parts) -> Result<()>, | ||
{ | ||
let res = if let Some(Ok(ref mut parts)) = self.parts { | ||
f(parts) | ||
} else { | ||
return self; | ||
}; | ||
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if let Err(err) = res { | ||
self.parts = Some(Err(err)); | ||
} | ||
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self | ||
} | ||
} | ||
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impl Default for Builder { | ||
#[inline] | ||
fn default() -> Builder { | ||
Builder { | ||
parts: Some(Ok(Parts::default())), | ||
} | ||
} | ||
} | ||
|
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