[−][src]Trait actix_web::dev::FromParam

pub trait FromParam: Sized {
    type Err: ResponseError;
    fn from_param(s: &str) -> Result<Self, Self::Err>;
}

A trait to abstract the idea of creating a new instance of a type from a path parameter.

Associated Types

`type Err: ResponseError`

The associated error which can be returned from parsing.

Required Methods

`fn from_param(s: &str) -> Result<Self, Self::Err>`

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

Implementations on Foreign Types

`impl FromParam for PathBuf`
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Creates a PathBuf from a path parameter. The returned PathBuf is percent-decoded. If a segment is equal to "..", the previous segment (if any) is skipped.

For security purposes, if a segment meets any of the following conditions, an Err is returned indicating the condition met:

Decoded segment starts with any of: . (except ..), *
Decoded segment ends with any of: :, >, <
Decoded segment contains any of: /
On Windows, decoded segment contains any of: ''
Percent-encoding results in invalid UTF8.

As a result of these conditions, a PathBuf parsed from request path parameter is safe to interpolate within, or use as a suffix of, a path without additional checks.

`type Err = UriSegmentError`

`fn from_param(val: &str) -> Result<PathBuf, UriSegmentError>`
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`impl FromParam for u8`
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`type Err = InternalError<<u8 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for u16`
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`type Err = InternalError<<u16 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for u32`
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`type Err = InternalError<<u32 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for u64`
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`type Err = InternalError<<u64 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for usize`
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`type Err = InternalError<<usize as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for i8`
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`type Err = InternalError<<i8 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for i16`
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`type Err = InternalError<<i16 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for i32`
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`type Err = InternalError<<i32 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for i64`
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`type Err = InternalError<<i64 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for isize`
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`type Err = InternalError<<isize as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for f32`
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`type Err = InternalError<<f32 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for f64`
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`type Err = InternalError<<f64 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for String`
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`type Err = InternalError<<String as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for IpAddr`
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`type Err = InternalError<<IpAddr as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for Ipv4Addr`
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`type Err = InternalError<<Ipv4Addr as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for Ipv6Addr`
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`type Err = InternalError<<Ipv6Addr as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for SocketAddr`
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`type Err = InternalError<<SocketAddr as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for SocketAddrV4`
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`type Err = InternalError<<SocketAddrV4 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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`impl FromParam for SocketAddrV6`
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`type Err = InternalError<<SocketAddrV6 as FromStr>::Err>`

`fn from_param(val: &str) -> Result<Self, Self::Err>`
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Implementors