From e2de93cbef4444304674a862f7331bc4a00b44bf Mon Sep 17 00:00:00 2001
From: Jens Reimann <jreimann@redhat.com>
Date: Mon, 30 Nov 2020 10:01:22 +0100
Subject: [PATCH] [#1095]: Implement `basic_auth` for WASM

Signed-off-by: Jens Reimann <jreimann@redhat.com>
---
 Cargo.toml          |  2 +-
 src/wasm/request.rs | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index 3e186940d..f5b3f4b6f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -76,6 +76,7 @@ __rustls = ["hyper-rustls", "tokio-rustls", "rustls", "__tls", "rustls-pemfile"]
 __internal_proxy_sys_no_cache = []
 
 [dependencies]
+base64 = "0.13"
 http = "0.2"
 url = "2.2"
 bytes = "1.0"
@@ -90,7 +91,6 @@ serde_json = { version = "1.0", optional = true }
 mime_guess = { version = "2.0", default-features = false, optional = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-base64 = "0.13"
 encoding_rs = "0.8"
 futures-core = { version = "0.3.0", default-features = false }
 futures-util = { version = "0.3.0", default-features = false }
diff --git a/src/wasm/request.rs b/src/wasm/request.rs
index a939cc7fd..4e7c5d7a0 100644
--- a/src/wasm/request.rs
+++ b/src/wasm/request.rs
@@ -1,6 +1,8 @@
 use std::convert::TryFrom;
 use std::fmt;
+use std::io::Write;
 
+use base64::write::EncoderWriter as Base64Encoder;
 use bytes::Bytes;
 use http::{request::Parts, Method, Request as HttpRequest};
 use serde::Serialize;
@@ -197,6 +199,25 @@ impl RequestBuilder {
         self
     }
 
+    /// Enable HTTP basic authentication.
+    pub fn basic_auth<U, P>(self, username: U, password: Option<P>) -> RequestBuilder
+    where
+        U: fmt::Display,
+        P: fmt::Display,
+    {
+        let mut header_value = b"Basic ".to_vec();
+        {
+            let mut encoder = Base64Encoder::new(&mut header_value, base64::STANDARD);
+            // The unwraps here are fine because Vec::write* is infallible.
+            write!(encoder, "{}:", username).unwrap();
+            if let Some(password) = password {
+                write!(encoder, "{}", password).unwrap();
+            }
+        }
+
+        self.header(crate::header::AUTHORIZATION, header_value)
+    }
+
     /// Enable HTTP bearer authentication.
     pub fn bearer_auth<T>(self, token: T) -> RequestBuilder
     where