use std::borrow::Cow;
use miasht::header::HeadersMut;
use serde::{ser, Serialize};
use serde::ser::Impossible;
use {Error, ErrorKind, Result};
#[derive(Debug)]
pub struct HttpHeaderSerializer<'a> {
is_first: bool,
key: Option<Cow<'static, str>>,
headers: HeadersMut<'a>,
}
impl<'a> HttpHeaderSerializer<'a> {
pub fn new(headers: HeadersMut<'a>) -> Self {
HttpHeaderSerializer {
is_first: true,
key: None,
headers,
}
}
fn append(&mut self, key_or_val: Cow<str>) {
if let Some(key) = self.key.take() {
let val = &key_or_val;
self.headers.add_raw_header(&key, val.as_bytes());
} else {
let key = key_or_val.into_owned();
self.key = Some(Cow::Owned(key));
}
}
}
impl<'a, 'b> ser::Serializer for &'a mut HttpHeaderSerializer<'b> {
type Ok = ();
type Error = Error;
type SerializeSeq = Impossible<Self::Ok, Self::Error>;
type SerializeTuple = Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = Impossible<Self::Ok, Self::Error>;
type SerializeMap = Self;
type SerializeStruct = Self;
type SerializeStructVariant = Self;
fn serialize_bool(self, v: bool) -> Result<Self::Ok> {
let s = if v { "ture" } else { "false" };
self.append(Cow::Borrowed(s));
Ok(())
}
fn serialize_i8(self, v: i8) -> Result<Self::Ok> {
track!(self.serialize_i64(v as i64))
}
fn serialize_i16(self, v: i16) -> Result<Self::Ok> {
track!(self.serialize_i64(v as i64))
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok> {
track!(self.serialize_i64(v as i64))
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok> {
self.append(Cow::Owned(v.to_string()));
Ok(())
}
fn serialize_u8(self, v: u8) -> Result<Self::Ok> {
track!(self.serialize_u64(v as u64))
}
fn serialize_u16(self, v: u16) -> Result<Self::Ok> {
track!(self.serialize_u64(v as u64))
}
fn serialize_u32(self, v: u32) -> Result<Self::Ok> {
track!(self.serialize_u64(v as u64))
}
fn serialize_u64(self, v: u64) -> Result<Self::Ok> {
self.append(Cow::Owned(v.to_string()));
Ok(())
}
fn serialize_f32(self, v: f32) -> Result<Self::Ok> {
track!(self.serialize_f64(v as f64))
}
fn serialize_f64(self, v: f64) -> Result<Self::Ok> {
self.append(Cow::Owned(v.to_string()));
Ok(())
}
fn serialize_char(self, v: char) -> Result<Self::Ok> {
track!(self.serialize_str(&v.to_string()))
}
fn serialize_str(self, v: &str) -> Result<Self::Ok> {
self.append(Cow::Borrowed(v));
Ok(())
}
fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok> {
use std::str;
let v = unsafe { str::from_utf8_unchecked(v) };
self.append(Cow::Borrowed(v));
Ok(())
}
fn serialize_none(self) -> Result<Self::Ok> {
track_assert!(self.key.take().is_some(), ErrorKind::Invalid);
Ok(())
}
fn serialize_some<T>(self, value: &T) -> Result<Self::Ok>
where
T: ?Sized + Serialize,
{
track!(value.serialize(self))
}
fn serialize_unit(self) -> Result<Self::Ok> {
track_panic!(ErrorKind::Invalid);
}
fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok> {
track!(self.serialize_str(name))
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok> {
track!(self.serialize_str(variant))
}
fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
where
T: ?Sized + Serialize,
{
track!(value.serialize(self))
}
fn serialize_newtype_variant<T>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
value: &T,
) -> Result<Self::Ok>
where
T: ?Sized + Serialize,
{
track!(value.serialize(self))
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq> {
track_panic!(ErrorKind::Invalid);
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple> {
track_panic!(ErrorKind::Invalid);
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleStruct> {
track_panic!(ErrorKind::Invalid);
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant> {
track_panic!(ErrorKind::Invalid);
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap> {
track_assert!(self.is_first, ErrorKind::Invalid);
self.is_first = false;
Ok(self)
}
fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
track_assert!(self.is_first, ErrorKind::Invalid);
self.is_first = false;
Ok(self)
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant> {
track_assert!(self.is_first, ErrorKind::Invalid);
self.is_first = false;
Ok(self)
}
}
impl<'a, 'b> ser::SerializeMap for &'a mut HttpHeaderSerializer<'b> {
type Ok = ();
type Error = Error;
fn serialize_key<T>(&mut self, key: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
track!(key.serialize(&mut **self))?;
Ok(())
}
fn serialize_value<T>(&mut self, value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
track!(value.serialize(&mut **self))?;
Ok(())
}
fn end(self) -> Result<Self::Ok> {
Ok(())
}
}
impl<'a, 'b> ser::SerializeStruct for &'a mut HttpHeaderSerializer<'b> {
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
self.key = Some(Cow::Borrowed(key));
track!(value.serialize(&mut **self))?;
Ok(())
}
fn end(self) -> Result<Self::Ok> {
Ok(())
}
}
impl<'a, 'b> ser::SerializeStructVariant for &'a mut HttpHeaderSerializer<'b> {
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
where
T: ?Sized + Serialize,
{
self.key = Some(Cow::Borrowed(key));
track!(value.serialize(&mut **self))?;
Ok(())
}
fn end(self) -> Result<Self::Ok> {
Ok(())
}
}