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Make headers method on WASM client for compatibility with async_impl (#991)

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The replace_headers method had to be moved since the async_impl module
is not compiled while compiling to wasm. This caused the replace_headers
method to be unavailable. fast_random had to be excluded from the wasm
build to prevent dead code warnings in the wasm target.
This commit is contained in:
Jason van den Hurk
2020-08-07 00:07:43 +02:00
committed by GitHub
parent 77d7e452e1
commit 83fa93ccaf
5 changed files with 44 additions and 30 deletions
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29
src/async_impl/request.rs
View File

@@ -185,7 +185,7 @@ impl RequestBuilder {
/// The headers will be merged in to any already set.
pub fn headers(mut self, headers: crate::header::HeaderMap) -> RequestBuilder {
if let Ok(ref mut req) = self.request {
replace_headers(req.headers_mut(), headers);
crate::util::replace_headers(req.headers_mut(), headers);
}
self
}
@@ -467,33 +467,6 @@ fn fmt_request_fields<'a, 'b>(
.field("headers", &req.headers)
}
pub(crate) fn replace_headers(dst: &mut HeaderMap, src: HeaderMap) {
// IntoIter of HeaderMap yields (Option<HeaderName>, HeaderValue).
// The first time a name is yielded, it will be Some(name), and if
// there are more values with the same name, the next yield will be
// None.
//
// TODO: a complex exercise would be to optimize this to only
// require 1 hash/lookup of the key, but doing something fancy
// with header::Entry...
let mut prev_name = None;
for (key, value) in src {
match key {
Some(key) => {
dst.insert(key.clone(), value);
prev_name = Some(key);
}
None => match prev_name {
Some(ref key) => {
dst.append(key.clone(), value);
}
None => unreachable!("HeaderMap::into_iter yielded None first"),
},
}
}
}
/// Check the request URL for a "username:password" type authority, and if
/// found, remove it from the URL and return it.

4
src/blocking/request.rs
View File

@@ -228,7 +228,7 @@ impl RequestBuilder {
/// ```
pub fn headers(mut self, headers: crate::header::HeaderMap) -> RequestBuilder {
if let Ok(ref mut req) = self.request {
async_impl::request::replace_headers(req.headers_mut(), headers);
crate::util::replace_headers(req.headers_mut(), headers);
}
self
}
@@ -605,7 +605,7 @@ impl<T> TryFrom<HttpRequest<T>> for Request where T:Into<Body> {
let url = Url::parse(&uri.to_string())
.map_err(crate::error::builder)?;
let mut inner = async_impl::Request::new(method, url);
async_impl::request::replace_headers(inner.headers_mut(), headers);
crate::util::replace_headers(inner.headers_mut(), headers);
Ok(Request {
body: Some(body.into()),
inner,

1
src/lib.rs
View File

@@ -306,6 +306,7 @@ if_hyper! {
if_wasm! {
mod wasm;
mod util;
pub use self::wasm::{multipart, Body, Client, ClientBuilder, Request, RequestBuilder, Response};
}

30
src/util.rs
View File

@@ -1,4 +1,7 @@
use crate::header::HeaderMap;
// xor-shift
#[cfg(not(target_arch = "wasm32"))]
pub(crate) fn fast_random() -> u64 {
use std::cell::Cell;
use std::collections::hash_map::RandomState;
@@ -33,3 +36,30 @@ pub(crate) fn fast_random() -> u64 {
n.0.wrapping_mul(0x2545_f491_4f6c_dd1d)
})
}
pub(crate) fn replace_headers(dst: &mut HeaderMap, src: HeaderMap) {
// IntoIter of HeaderMap yields (Option<HeaderName>, HeaderValue).
// The first time a name is yielded, it will be Some(name), and if
// there are more values with the same name, the next yield will be
// None.
//
// TODO: a complex exercise would be to optimize this to only
// require 1 hash/lookup of the key, but doing something fancy
// with header::Entry...
let mut prev_name = None;
for (key, value) in src {
match key {
Some(key) => {
dst.insert(key.clone(), value);
prev_name = Some(key);
}
None => match prev_name {
Some(ref key) => {
dst.append(key.clone(), value);
}
None => unreachable!("HeaderMap::into_iter yielded None first"),
},
}
}
}

10
src/wasm/request.rs
View File

@@ -224,6 +224,16 @@ impl RequestBuilder {
self
}
/// Add a set of Headers to the existing ones on this Request.
///
/// The headers will be merged in to any already set.
pub fn headers(mut self, headers: crate::header::HeaderMap) -> RequestBuilder {
if let Ok(ref mut req) = self.request {
crate::util::replace_headers(req.headers_mut(), headers);
}
self
}
/// Disable CORS on fetching the request.
///
/// # WASM