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x-www-form-urlencoded meets Serde

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Anthony Ramine 2016-09-11 13:26:21 +02:00
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target
Cargo.lock

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language: rust
rust:
- nightly
- beta
- stable

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[package]
name = "serde_urlencoded"
version = "0.1.0"
authors = ["Anthony Ramine <n.oxyde@gmail.com>"]
license = "MIT/Apache-2.0"
repository = "https://github.com/nox/serde_urlencoded"
documentation = "https://docs.rs/crate/serde_urlencoded"
description = "`x-www-form-urlencoded` meets Serde"
keywords = ["serde", "serialization", "urlencoded"]
[dependencies]
serde = "0.8.7"
url = "1.0.0"

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Apache License
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Copyright (c) 2016 Anthony Ramine
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
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The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

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`x-www-form-urlencoded` meets Serde
===================================
This crate is a Rust library for serialising to and deserialising from
the [`application/x-www-form-urlencoded`][urlencoded] format. It is built
upon [Serde], a high performance generic serialization framework and [rust-url],
a URL parser for Rust.
[rust-url]: https://github.com/servo/rust-url
[Serde]: https://github.com/serde-rs/serde
[urlencoded]: https://url.spec.whatwg.org/#application/x-www-form-urlencoded
Installation
============
This crate works with Cargo and can be found on
[crates.io] with a `Cargo.toml` like:
```toml
[dependencies]
serde_urlencoded = "0.1"
```
[crates.io]: https://crates.io/crates/serde_urlencoded
## Getting help
Serde developers live in the #serde channel on
[`irc.mozilla.org`](https://wiki.mozilla.org/IRC) and most rust-url developers
live in the #servo one. The #rust channel is also a good resource with generally
faster response time but less specific knowledge about Serde, rust-url or this
crate. If IRC is not your thing, we are happy to respond to [GitHub
issues](https://github.com/nox/serde_urlencoded/issues/new) as well.
## License
Serde is licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or
http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.

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//! Deserialization support for the `application/x-www-form-urlencoded` format.
use serde::de;
use serde::de::value::MapDeserializer;
use std::borrow::Cow;
use std::marker::PhantomData;
use url::form_urlencoded::Parse;
pub use serde::de::value::Error;
/// A deserializer for the `application/x-www-form-urlencoded` format.
///
/// * Supported top-level outputs are structs, maps and sequences of pairs,
/// with or without a given length.
///
/// * Main `deserialize` methods defers to `deserialize_map`.
///
/// * Everything else but `deserialize_seq` and `deserialize_seq_fixed_size`
/// defers to `deserialize`.
pub struct Deserializer<'a, T> {
deserializer: MapDeserializer<Parse<'a>, Cow<'a, str>, Cow<'a, str>, Error>,
marker: PhantomData<T>,
}
impl<'a, T> de::Deserializer for Deserializer<'a, T>
{
type Error = Error;
fn deserialize<V>(
&mut self, visitor: V)
-> Result<V::Value, Self::Error>
where V: de::Visitor,
{
self.deserialize_map(visitor)
}
fn deserialize_map<V>(
&mut self, mut visitor: V)
-> Result<V::Value, Self::Error>
where V: de::Visitor,
{
visitor.visit_map(&mut self.deserializer)
}
fn deserialize_seq<V>(
&mut self, mut visitor: V)
-> Result<V::Value, Self::Error>
where V: de::Visitor,
{
visitor.visit_seq(&mut self.deserializer)
}
fn deserialize_seq_fixed_size<V>(
&mut self, _len: usize, mut visitor: V)
-> Result<V::Value, Self::Error>
where V: de::Visitor
{
visitor.visit_seq(&mut self.deserializer)
}
forward_to_deserialize! {
bool
usize
u8
u16
u32
u64
isize
i8
i16
i32
i64
f32
f64
char
str
string
unit
option
bytes
unit_struct
newtype_struct
tuple_struct
struct
struct_field
tuple
enum
ignored_any
}
}

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//! `x-www-form-urlencoded` meets Serde
#[macro_use]
extern crate serde;
extern crate url;
pub mod de;
pub mod ser;
pub use de::Deserializer;
pub use ser::Serializer;

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use serde::{Serialize, Serializer};
use ser::Error;
use std::borrow::Cow;
use std::str;
pub struct MapKeySerializer<'key>(&'key mut Option<Cow<'static, str>>);
impl<'key> MapKeySerializer<'key> {
pub fn new(output: &'key mut Option<Cow<'static, str>>) -> Self {
MapKeySerializer(output)
}
fn set_key<T>(&mut self, key: T) -> Result<(), Error>
where T: Into<Cow<'static, str>>
{
*self.0 = Some(key.into());
Ok(())
}
}
impl<'key> Serializer for MapKeySerializer<'key> {
type Error = Error;
type SeqState = ();
type TupleState = ();
type TupleStructState = ();
type TupleVariantState = ();
type MapState = ();
type StructState = ();
type StructVariantState = ();
fn serialize_bool(&mut self, _v: bool) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_isize(&mut self, v: isize) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_i8(&mut self, v: i8) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_i16(&mut self, v: i16) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_i32(&mut self, v: i32) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_i64(&mut self, v: i64) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_usize(&mut self, v: usize) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_u8(&mut self, v: u8) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_u16(&mut self, v: u16) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_u32(&mut self, v: u32) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_u64(&mut self, v: u64) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_f32(&mut self, v: f32) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_f64(&mut self, v: f64) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_char(&mut self, v: char) -> Result<(), Error> {
self.set_key(v.to_string())
}
fn serialize_str(&mut self, value: &str) -> Result<(), Error> {
self.set_key(String::from(value))
}
fn serialize_bytes(&mut self, value: &[u8]) -> Result<(), Error> {
match str::from_utf8(value) {
Ok(value) => self.set_key(String::from(value)),
Err(err) => Err(Error::Utf8(err)),
}
}
fn serialize_unit(&mut self) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_unit_struct(
&mut self, name: &'static str)
-> Result<(), Error> {
self.set_key(name)
}
fn serialize_unit_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
variant: &'static str)
-> Result<(), Error> {
self.set_key(variant)
}
fn serialize_newtype_struct<T>(
&mut self, _name: &'static str, value: T)
-> Result<(), Error>
where T: Serialize
{
value.serialize(self)
}
fn serialize_newtype_variant<T>(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_none(&mut self) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_some<T>(&mut self, _value: T) -> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_seq(&mut self, _len: Option<usize>) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_seq_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_seq_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_seq_fixed_size(&mut self, _size: usize) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_tuple(&mut self, _len: usize) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_tuple_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_tuple_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_tuple_struct(
&mut self, _name: &'static str, _len: usize)
-> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_tuple_struct_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_tuple_struct_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_tuple_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_tuple_variant_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_tuple_variant_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_map(&mut self, _len: Option<usize>) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_map_key<T>(
&mut self, _state: &mut (), _key: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_map_value<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_map_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_struct(
&mut self, _name: &'static str, _len: usize)
-> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_struct_elt<T>(
&mut self, _state: &mut (), _key: &'static str, _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_key())
}
fn serialize_struct_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_struct_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_struct_variant_elt<T>(
&mut self, _state: &mut (), _key: &'static str, _value: T)
-> Result<(), Error> {
Err(Error::unsupported_key())
}
fn serialize_struct_variant_end(
&mut self, _state: ())
-> Result<(), Error> {
Err(Error::unsupported_key())
}
}
impl Error {
fn unsupported_key() -> Self {
Error::Custom("unsupported key".into())
}
}

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//! Serialization support for the `application/x-www-form-urlencoded` format.
mod key;
mod pair;
mod value;
use serde::ser;
use std::borrow::Cow;
use std::error;
use std::fmt;
use std::str;
use url::form_urlencoded;
/// A serializer for the `application/x-www-form-urlencoded` format.
///
/// * Supported top-level inputs are structs, maps and sequences of pairs,
/// with or without a given length.
///
/// * Supported keys and values are integers, bytes (if convertible to strings),
/// unit structs and unit variants.
///
/// * Newtype structs defer to their inner values.
pub struct Serializer<T>(form_urlencoded::Serializer<T>)
where T: form_urlencoded::Target;
/// Errors returned during serializing to `application/x-www-form-urlencoded`.
#[derive(Clone, Debug)]
pub enum Error {
Custom(Cow<'static, str>),
InvalidValue(Cow<'static, str>),
Utf8(str::Utf8Error),
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match *self {
Error::Custom(ref msg) => msg.fmt(f),
Error::InvalidValue(ref msg) => write!(f, "invalid value: {}", msg),
Error::Utf8(ref err) => write!(f, "invalid UTF-8: {}", err),
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::Custom(ref msg) => msg,
Error::InvalidValue(ref msg) => msg,
Error::Utf8(ref err) => error::Error::description(err),
}
}
/// The lower-level cause of this error, in the case of a `Utf8` error.
fn cause(&self) -> Option<&error::Error> {
match *self {
Error::Custom(_) | Error::InvalidValue(_) => None,
Error::Utf8(ref err) => Some(err),
}
}
}
impl ser::Error for Error {
fn custom<T: Into<String>>(msg: T) -> Self {
Error::Custom(msg.into().into())
}
fn invalid_value(msg: &str) -> Self {
Error::InvalidValue(String::from(msg).into())
}
}
/// State used when serializing sequences.
pub struct SeqState(());
/// State used when serializing tuples.
pub struct TupleState(());
/// State used when serializing tuple structs.
pub struct TupleStructState(());
/// State used when serializing tuple variants.
pub struct TupleVariantState(());
/// State used when serializing maps.
pub struct MapState(Option<Cow<'static, str>>);
/// State used when serializing structs.
pub struct StructState(());
/// State used when serializing struct variants.
pub struct StructVariantState(());
impl<Target: form_urlencoded::Target> ser::Serializer for Serializer<Target> {
type Error = Error;
/// State used when serializing sequences.
type SeqState = SeqState;
/// State used when serializing tuples.
type TupleState = TupleState;
/// State used when serializing tuple structs.
type TupleStructState = TupleStructState;
/// State used when serializing tuple variants.
type TupleVariantState = TupleVariantState;
/// State used when serializing maps.
type MapState = MapState;
/// State used when serializing structs.
type StructState = StructState;
/// State used when serializing struct variants.
type StructVariantState = StructVariantState;
/// Returns an error.
fn serialize_bool(&mut self, _v: bool) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_isize(&mut self, _v: isize) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_i8(&mut self, _v: i8) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_i16(&mut self, _v: i16) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_i32(&mut self, _v: i32) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_i64(&mut self, _v: i64) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_usize(&mut self, _v: usize) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_u8(&mut self, _v: u8) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_u16(&mut self, _v: u16) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_u32(&mut self, _v: u32) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_u64(&mut self, _v: u64) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_f32(&mut self, _v: f32) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_f64(&mut self, _v: f64) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_char(&mut self, _v: char) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_str(&mut self, _value: &str) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_bytes(&mut self, _value: &[u8]) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_unit(&mut self) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_unit_struct(
&mut self, _name: &'static str)
-> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_unit_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str)
-> Result<(), Error> {
Err(Error::top_level())
}
/// Serializes the inner value, ignoring the newtype name.
fn serialize_newtype_struct<T>(
&mut self, _name: &'static str, value: T)
-> Result<(), Error>
where T: ser::Serialize
{
value.serialize(self)
}
/// Returns an error.
fn serialize_newtype_variant<T>(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_value: T)
-> Result<(), Error>
where T: ser::Serialize
{
Err(Error::top_level())
}
/// Returns an error.
fn serialize_none(&mut self) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_some<T>(&mut self, _value: T) -> Result<(), Error>
where T: ser::Serialize
{
Err(Error::top_level())
}
/// Begins to serialize a sequence, given length (if any) is ignored.
fn serialize_seq(
&mut self, _len: Option<usize>)
-> Result<SeqState, Error> {
Ok(SeqState(()))
}
/// Serializes a sequence element.
fn serialize_seq_elt<T>(
&mut self, _state: &mut SeqState, value: T)
-> Result<(), Error>
where T: ser::Serialize
{
value.serialize(&mut pair::PairSerializer::new(&mut self.0))
}
/// Finishes serializing a sequence.
fn serialize_seq_end(&mut self, _state: SeqState) -> Result<(), Error> {
Ok(())
}
/// Begins to serialize a sequence, given length is ignored.
fn serialize_seq_fixed_size(
&mut self, _length: usize)
-> Result<SeqState, Error> {
Ok(SeqState(()))
}
/// Returns an error.
fn serialize_tuple(&mut self, _len: usize) -> Result<TupleState, Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_elt<T>(
&mut self, _state: &mut TupleState, _value: T)
-> Result<(), Error>
where T: ser::Serialize
{
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_end(&mut self, _state: TupleState) -> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_struct(
&mut self, _name: &'static str, _len: usize)
-> Result<TupleStructState, Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_struct_elt<T>(
&mut self, _state: &mut TupleStructState, _value: T)
-> Result<(), Error>
where T: ser::Serialize
{
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_struct_end(
&mut self, _state: TupleStructState)
-> Result<(), Error>
{
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<TupleVariantState, Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_variant_elt<T>(
&mut self, _state: &mut TupleVariantState, _value: T)
-> Result<(), Error>
where T: ser::Serialize
{
Err(Error::top_level())
}
/// Returns an error.
fn serialize_tuple_variant_end(
&mut self, _state: TupleVariantState)
-> Result<(), Error> {
Err(Error::top_level())
}
/// Begins to serialize a map, given length (if any) is ignored.
fn serialize_map(
&mut self, _len: Option<usize>)
-> Result<MapState, Error> {
Ok(MapState(None))
}
/// Serializes a map key.
fn serialize_map_key<T>(
&mut self, state: &mut MapState, key: T)
-> Result<(), Error>
where T: ser::Serialize
{
key.serialize(&mut key::MapKeySerializer::new(&mut state.0))
}
/// Serializes a map value.
fn serialize_map_value<T>(
&mut self, state: &mut MapState, value: T)
-> Result<(), Error>
where T: ser::Serialize
{
let mut value_serializer =
try!(value::ValueSerializer::new(&mut state.0, &mut self.0));
value.serialize(&mut value_serializer)
}
/// Finishes serializing a map.
fn serialize_map_end(&mut self, _state: MapState) -> Result<(), Error> {
Ok(())
}
/// Begins to serialize a struct, given length is ignored.
fn serialize_struct(
&mut self, _name: &'static str, _len: usize)
-> Result<StructState, Error> {
Ok(StructState(()))
}
/// Serializes a struct element.
fn serialize_struct_elt<T>(
&mut self,
_state: &mut StructState,
key: &'static str,
value: T)
-> Result<(), Error>
where T: ser::Serialize
{
let mut key = Some(key.into());
let mut value_serializer =
value::ValueSerializer::new(&mut key, &mut self.0).unwrap();
value.serialize(&mut value_serializer)
}
/// Finishes serializing a struct.
fn serialize_struct_end(&mut self, _state: StructState)
-> Result<(), Error> {
Ok(())
}
/// Returns an error.
fn serialize_struct_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<StructVariantState, Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_struct_variant_elt<T>(
&mut self,
_state: &mut StructVariantState,
_key: &'static str,
_value: T)
-> Result<(), Error> {
Err(Error::top_level())
}
/// Returns an error.
fn serialize_struct_variant_end(
&mut self, _state: StructVariantState)
-> Result<(), Error> {
Err(Error::top_level())
}
}
impl Error {
fn top_level() -> Self {
Error::Custom(
"top-level serializer supports only maps and structs".into())
}
}

330
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use ser::{Error, key, value};
use serde::{Serialize, Serializer};
use std::borrow::Cow;
use url::form_urlencoded;
pub struct PairSerializer<'target, Target>(
&'target mut form_urlencoded::Serializer<Target>)
where Target: 'target + form_urlencoded::Target;
impl<'target, Target> PairSerializer<'target, Target>
where Target: 'target + form_urlencoded::Target
{
pub fn new(
serializer: &'target mut form_urlencoded::Serializer<Target>)
-> Self {
PairSerializer(serializer)
}
}
pub struct TupleState(Option<Option<Cow<'static, str>>>);
pub struct TupleStructState(TupleState);
impl<'target, Target> Serializer for PairSerializer<'target, Target>
where Target: 'target + form_urlencoded::Target
{
type Error = Error;
type SeqState = ();
type TupleState = TupleState;
type TupleStructState = TupleStructState;
type TupleVariantState = ();
type MapState = ();
type StructState = ();
type StructVariantState = ();
fn serialize_bool(&mut self, _v: bool) -> Result<(), Error> {
Err(Error::Custom("booleans are not supported values".into()))
}
fn serialize_isize(&mut self, _v: isize) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_i8(&mut self, _v: i8) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_i16(&mut self, _v: i16) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_i32(&mut self, _v: i32) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_i64(&mut self, _v: i64) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_usize(&mut self, _v: usize) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_u8(&mut self, _v: u8) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_u16(&mut self, _v: u16) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_u32(&mut self, _v: u32) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_u64(&mut self, _v: u64) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_f32(&mut self, _v: f32) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_f64(&mut self, _v: f64) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_char(&mut self, _v: char) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_str(&mut self, _value: &str) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_bytes(&mut self, _value: &[u8]) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_unit(&mut self) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_unit_struct(
&mut self, _name: &'static str)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_unit_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_newtype_struct<T>(
&mut self, _name: &'static str, value: T)
-> Result<(), Error>
where T: Serialize
{
value.serialize(self)
}
fn serialize_newtype_variant<T>(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_pair())
}
fn serialize_none(&mut self) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_some<T>(&mut self, _value: T) -> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_pair())
}
fn serialize_seq(&mut self, _len: Option<usize>)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_seq_elt<T>(&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_pair())
}
fn serialize_seq_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_seq_fixed_size(&mut self, _size: usize)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_tuple(&mut self, len: usize) -> Result<TupleState, Error> {
if len == 2 {
Ok(TupleState(None))
} else {
Err(Error::unsupported_pair())
}
}
fn serialize_tuple_elt<T>(
&mut self, state: &mut TupleState, value: T)
-> Result<(), Error>
where T: Serialize
{
match state.0.take() {
None => {
let mut key = None;
{
let mut key_serializer =
key::MapKeySerializer::new(&mut key);
try!(value.serialize(&mut key_serializer));
}
state.0 = Some(key);
Ok(())
},
Some(ref mut key) => {
{
let mut value_serializer =
value::ValueSerializer::new(key, &mut self.0).unwrap();
try!(value.serialize(&mut value_serializer));
}
state.0 = Some(None);
Ok(())
}
}
}
fn serialize_tuple_end(&mut self, _state: TupleState) -> Result<(), Error> {
Ok(())
}
fn serialize_tuple_struct(
&mut self, _name: &'static str, len: usize)
-> Result<TupleStructState, Error> {
self.serialize_tuple(len).map(TupleStructState)
}
fn serialize_tuple_struct_elt<T>(
&mut self, state: &mut TupleStructState, value: T)
-> Result<(), Error>
where T: Serialize
{
self.serialize_tuple_elt(&mut state.0, value)
}
fn serialize_tuple_struct_end(
&mut self, _state: TupleStructState)
-> Result<(), Error> {
Ok(())
}
fn serialize_tuple_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_tuple_variant_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_pair())
}
fn serialize_tuple_variant_end(
&mut self, _state: ())
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_map(
&mut self, _len: Option<usize>)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_map_key<T>(
&mut self, _state: &mut (), _key: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_pair())
}
fn serialize_map_value<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_pair())
}
fn serialize_map_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_struct(&mut self, _name: &'static str, _len: usize)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_struct_elt<T>(
&mut self,
_state: &mut (),
_key: &'static str,
_value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_pair())
}
fn serialize_struct_end(
&mut self, _state: ())
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_struct_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_struct_variant_elt<T>(
&mut self,
_state: &mut (),
_key: &'static str,
_value: T)
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
fn serialize_struct_variant_end(
&mut self, _state: ())
-> Result<(), Error> {
Err(Error::unsupported_pair())
}
}
impl Error {
fn unsupported_pair() -> Self {
Error::Custom("unsupported pair".into())
}
}

322
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use ser::Error;
use serde::{Serialize, Serializer};
use std::borrow::Cow;
use std::str;
use url::form_urlencoded;
pub struct ValueSerializer<'key, 'target, Target>
where Target: 'target + form_urlencoded::Target
{
key: &'key mut Option<Cow<'static, str>>,
serializer: &'target mut form_urlencoded::Serializer<Target>
}
impl<'key, 'target, Target> ValueSerializer<'key, 'target, Target>
where Target: 'target + form_urlencoded::Target
{
pub fn new(
key: &'key mut Option<Cow<'static, str>>,
serializer: &'target mut form_urlencoded::Serializer<Target>)
-> Result<Self, Error> {
if key.is_some() {
Ok(ValueSerializer {
key: key,
serializer: serializer,
})
} else {
Err(Error::no_key())
}
}
fn append_pair(&mut self, value: &str) -> Result<(), Error> {
if let Some(key) = self.key.take() {
self.serializer.append_pair(&key, value);
Ok(())
} else {
Err(Error::no_key())
}
}
}
impl<'key, 'target, Target> Serializer
for ValueSerializer<'key, 'target, Target>
where Target: 'target + form_urlencoded::Target
{
type Error = Error;
type SeqState = ();
type TupleState = ();
type TupleStructState = ();
type TupleVariantState = ();
type MapState = ();
type StructState = ();
type StructVariantState = ();
fn serialize_bool(&mut self, _v: bool) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_isize(&mut self, v: isize) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_i8(&mut self, v: i8) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_i16(&mut self, v: i16) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_i32(&mut self, v: i32) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_i64(&mut self, v: i64) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_usize(&mut self, v: usize) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_u8(&mut self, v: u8) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_u16(&mut self, v: u16) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_u32(&mut self, v: u32) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_u64(&mut self, v: u64) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_f32(&mut self, v: f32) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_f64(&mut self, v: f64) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_char(&mut self, v: char) -> Result<(), Error> {
self.append_pair(&v.to_string())
}
fn serialize_str(&mut self, value: &str) -> Result<(), Error> {
self.append_pair(value)
}
fn serialize_bytes(&mut self, value: &[u8]) -> Result<(), Error> {
match str::from_utf8(value) {
Ok(value) => self.append_pair(value),
Err(err) => Err(Error::Utf8(err)),
}
}
fn serialize_unit(&mut self) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_unit_struct(
&mut self, name: &'static str)
-> Result<(), Error> {
self.append_pair(name)
}
fn serialize_unit_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
variant: &'static str)
-> Result<(), Error> {
self.append_pair(variant)
}
fn serialize_newtype_struct<T>(
&mut self, _name: &'static str, value: T)
-> Result<(), Error>
where T: Serialize
{
value.serialize(self)
}
fn serialize_newtype_variant<T>(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_none(&mut self) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_some<T>(&mut self, _value: T) -> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_seq(&mut self, _len: Option<usize>) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_seq_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_seq_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_seq_fixed_size(&mut self, _size: usize) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_tuple(&mut self, _len: usize) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_tuple_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_tuple_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_tuple_struct(
&mut self, _name: &'static str, _len: usize)
-> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_tuple_struct_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_tuple_struct_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_tuple_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_tuple_variant_elt<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_tuple_variant_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_map(&mut self, _len: Option<usize>) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_map_key<T>(
&mut self, _state: &mut (), _key: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_map_value<T>(
&mut self, _state: &mut (), _value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_map_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_struct(
&mut self, _name: &'static str, _len: usize)
-> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_struct_elt<T>(
&mut self,
_state: &mut (),
_key: &'static str,
_value: T)
-> Result<(), Error>
where T: Serialize
{
Err(Error::unsupported_value())
}
fn serialize_struct_end(&mut self, _state: ()) -> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_struct_variant(
&mut self,
_name: &'static str,
_variant_index: usize,
_variant: &'static str,
_len: usize)
-> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_struct_variant_elt<T>(
&mut self, _state: &mut (), _key: &'static str, _value: T)
-> Result<(), Error> {
Err(Error::unsupported_value())
}
fn serialize_struct_variant_end(
&mut self, _state: ())
-> Result<(), Error> {
Err(Error::unsupported_value())
}
}
impl Error {
fn no_key() -> Self {
Error::Custom(
"tried to serialize a value before serializing key".into())
}
fn unsupported_value() -> Self {
Error::Custom("unsupported value".into())
}
}