Add support for a HTTP body for POST (#139)

Closes https://github.com/emilk/egui/issues/137

Co-authored-by: Emil Ernerfeldt <emilernerfeldt@gmail.com>

egui_glium/src/http.rs

@@ -3,9 +3,15 @@ pub use epi::http::{Request, Response};
 /// NOTE: Ok(..) is returned on network error.
 /// Err is only for failure to use the fetch api.
 pub fn fetch_blocking(request: &Request) -> Result<Response, String> {
-    let Request { method, url } = request;
+    let Request { method, url, body } = request;
 
-    let resp = ureq::request(method, url).set("Accept", "*/*").call();
+    let req = ureq::request(method, url).set("Accept", "*/*");
+    let resp = if body.is_empty() {
+        req.call()
+    } else {
+        req.set("Content-Type", "text/plain; charset=utf-8")
+            .send_string(body)
+    };
 
     let (ok, resp) = match resp {
         Ok(resp) => (true, resp),

egui_web/src/http.rs

@@ -13,7 +13,7 @@ pub async fn fetch_async(request: &Request) -> Result<Response, String> {
 /// NOTE: Ok(..) is returned on network error.
 /// Err is only for failure to use the fetch api.
 async fn fetch_jsvalue(request: &Request) -> Result<Response, JsValue> {
-    let Request { method, url } = request;
+    let Request { method, url, body } = request;
 
     // https://rustwasm.github.io/wasm-bindgen/examples/fetch.html
 
@@ -24,6 +24,10 @@ async fn fetch_jsvalue(request: &Request) -> Result<Response, JsValue> {
     opts.method(method);
     opts.mode(web_sys::RequestMode::Cors);
 
+    if !body.is_empty() {
+        opts.body(Some(&JsValue::from_str(body)));
+    }
+
     let request = web_sys::Request::new_with_str_and_init(&url, &opts)?;
     request.headers().set("Accept", "*/*")?;
 

epi/src/lib.rs

@@ -263,6 +263,8 @@ pub mod http {
         pub method: String,
         /// https://…
         pub url: String,
+        /// x-www-form-urlencoded body
+        pub body: String,
     }
 
     impl Request {
@@ -271,6 +273,16 @@ pub mod http {
             Self {
                 method: "GET".to_owned(),
                 url: url.into(),
+                body: "".to_string(),
+            }
+        }
+
+        /// Create a `POST` requests with the give url and body.
+        pub fn post(url: impl Into<String>, body: impl Into<String>) -> Self {
+            Self {
+                method: "POST".to_owned(),
+                url: url.into(),
+                body: body.into(),
             }
         }
     }