Trait HostFields

pub trait HostFields: Sized + Send {
    // Required methods
    fn new(&mut self) -> Result<Resource<Fields>>;
    fn from_list(
        &mut self,
        entries: Vec<(FieldName, FieldValue)>,
    ) -> Result<Result<Resource<Fields>, HeaderError>>;
    fn get(
        &mut self,
        self_: Resource<Fields>,
        name: FieldName,
    ) -> Result<Vec<FieldValue>>;
    fn has(&mut self, self_: Resource<Fields>, name: FieldName) -> Result<bool>;
    fn set(
        &mut self,
        self_: Resource<Fields>,
        name: FieldName,
        value: Vec<FieldValue>,
    ) -> Result<Result<(), HeaderError>>;
    fn delete(
        &mut self,
        self_: Resource<Fields>,
        name: FieldName,
    ) -> Result<Result<(), HeaderError>>;
    fn append(
        &mut self,
        self_: Resource<Fields>,
        name: FieldName,
        value: FieldValue,
    ) -> Result<Result<(), HeaderError>>;
    fn entries(
        &mut self,
        self_: Resource<Fields>,
    ) -> Result<Vec<(FieldName, FieldValue)>>;
    fn clone(&mut self, self_: Resource<Fields>) -> Result<Resource<Fields>>;
    fn drop(&mut self, rep: Resource<Fields>) -> Result<()>;
}

Required Methods

fn new(&mut self) -> Result<Resource<Fields>>

Construct an empty HTTP Fields.

The resulting fields is mutable.

fn from_list( &mut self, entries: Vec<(FieldName, FieldValue)>, ) -> Result<Result<Resource<Fields>, HeaderError>>

Construct an HTTP Fields.

The resulting fields is mutable.

The list represents each name-value pair in the Fields. Names which have multiple values are represented by multiple entries in this list with the same name.

The tuple is a pair of the field name, represented as a string, and Value, represented as a list of bytes.

An error result will be returned if any field-name or field-value is syntactically invalid, or if a field is forbidden.

fn get( &mut self, self_: Resource<Fields>, name: FieldName, ) -> Result<Vec<FieldValue>>

Get all of the values corresponding to a name. If the name is not present in this fields or is syntactically invalid, an empty list is returned. However, if the name is present but empty, this is represented by a list with one or more empty field-values present.

fn has(&mut self, self_: Resource<Fields>, name: FieldName) -> Result<bool>

Returns true when the name is present in this fields. If the name is syntactically invalid, false is returned.

fn set( &mut self, self_: Resource<Fields>, name: FieldName, value: Vec<FieldValue>, ) -> Result<Result<(), HeaderError>>

Set all of the values for a name. Clears any existing values for that name, if they have been set.

Fails with header-error.immutable if the fields are immutable.

Fails with header-error.invalid-syntax if the field-name or any of the field-values are syntactically invalid.

fn delete( &mut self, self_: Resource<Fields>, name: FieldName, ) -> Result<Result<(), HeaderError>>

Delete all values for a name. Does nothing if no values for the name exist.

Fails with header-error.immutable if the fields are immutable.

Fails with header-error.invalid-syntax if the field-name is syntactically invalid.

fn append( &mut self, self_: Resource<Fields>, name: FieldName, value: FieldValue, ) -> Result<Result<(), HeaderError>>

Append a value for a name. Does not change or delete any existing values for that name.

Fails with header-error.immutable if the fields are immutable.

Fails with header-error.invalid-syntax if the field-name or field-value are syntactically invalid.

fn entries( &mut self, self_: Resource<Fields>, ) -> Result<Vec<(FieldName, FieldValue)>>

Retrieve the full set of names and values in the Fields. Like the constructor, the list represents each name-value pair.

The outer list represents each name-value pair in the Fields. Names which have multiple values are represented by multiple entries in this list with the same name.

The names and values are always returned in the original casing and in the order in which they will be serialized for transport.

fn clone(&mut self, self_: Resource<Fields>) -> Result<Resource<Fields>>

Make a deep copy of the Fields. Equivalent in behavior to calling the fields constructor on the return value of entries. The resulting fields is mutable.

fn drop(&mut self, rep: Resource<Fields>) -> Result<()>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<_T: HostFields + ?Sized + Send> HostFields for &mut _T

fn new(&mut self) -> Result<Resource<Fields>>

Construct an empty HTTP Fields.

The resulting fields is mutable.

fn from_list( &mut self, entries: Vec<(FieldName, FieldValue)>, ) -> Result<Result<Resource<Fields>, HeaderError>>

Construct an HTTP Fields.

The resulting fields is mutable.

The list represents each name-value pair in the Fields. Names which have multiple values are represented by multiple entries in this list with the same name.

The tuple is a pair of the field name, represented as a string, and Value, represented as a list of bytes.

An error result will be returned if any field-name or field-value is syntactically invalid, or if a field is forbidden.

fn get( &mut self, self_: Resource<Fields>, name: FieldName, ) -> Result<Vec<FieldValue>>

Get all of the values corresponding to a name. If the name is not present in this fields or is syntactically invalid, an empty list is returned. However, if the name is present but empty, this is represented by a list with one or more empty field-values present.

fn has(&mut self, self_: Resource<Fields>, name: FieldName) -> Result<bool>

Returns true when the name is present in this fields. If the name is syntactically invalid, false is returned.

fn set( &mut self, self_: Resource<Fields>, name: FieldName, value: Vec<FieldValue>, ) -> Result<Result<(), HeaderError>>

Set all of the values for a name. Clears any existing values for that name, if they have been set.

Fails with header-error.immutable if the fields are immutable.

Fails with header-error.invalid-syntax if the field-name or any of the field-values are syntactically invalid.

fn delete( &mut self, self_: Resource<Fields>, name: FieldName, ) -> Result<Result<(), HeaderError>>

Delete all values for a name. Does nothing if no values for the name exist.

Fails with header-error.immutable if the fields are immutable.

Fails with header-error.invalid-syntax if the field-name is syntactically invalid.

fn append( &mut self, self_: Resource<Fields>, name: FieldName, value: FieldValue, ) -> Result<Result<(), HeaderError>>

Append a value for a name. Does not change or delete any existing values for that name.

Fails with header-error.immutable if the fields are immutable.

Fails with header-error.invalid-syntax if the field-name or field-value are syntactically invalid.

fn entries( &mut self, self_: Resource<Fields>, ) -> Result<Vec<(FieldName, FieldValue)>>

Retrieve the full set of names and values in the Fields. Like the constructor, the list represents each name-value pair.

The outer list represents each name-value pair in the Fields. Names which have multiple values are represented by multiple entries in this list with the same name.

The names and values are always returned in the original casing and in the order in which they will be serialized for transport.

fn clone(&mut self, self_: Resource<Fields>) -> Result<Resource<Fields>>

Make a deep copy of the Fields. Equivalent in behavior to calling the fields constructor on the return value of entries. The resulting fields is mutable.

fn drop(&mut self, rep: Resource<Fields>) -> Result<()>

Implementors

impl<T> HostFields for WasiHttpImpl<T>

where T: WasiHttpView,