Add templating example with tera (#267)

http-rs · Jun 6, 2019 · 4486ba0 · 4486ba0
1 parent 1fb4ab3
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diff --git a/Cargo.toml b/Cargo.toml
@@ -47,6 +47,7 @@ mime = "0.3.13"
 mime_guess = "2.0.0-alpha.6"
 percent-encoding = "1.0.1"
 serde = { version = "1.0.91", features = ["derive"] }
+tera = "0.11"
 tide-log = { path = "./tide-log" }
 env_logger = "0.6.1"
 log4rs = "0.8.3"

diff --git a/examples/templates/tera-hello-world.html b/examples/templates/tera-hello-world.html
@@ -0,0 +1,15 @@
+<html>
+    <head>
+        <title>{{ page_title }}</title>
+    </head>
+
+    <body>
+        <ul>
+            {% for point in points %}
+                <li>
+                    {{ point }}
+                </li>
+            {% endfor %}
+        </ul>
+    </body>
+</html>
diff --git a/examples/templating_tera.rs b/examples/templating_tera.rs
@@ -0,0 +1,53 @@
+#![feature(async_await)]
+
+use tera::{self, compile_templates};
+use tide::{self, App, Context, EndpointResult, Error};
+
+// AppState to pass with context and will hold
+// the interface to the tera rendering engine
+struct AppState {
+    template: tera::Tera,
+}
+
+// Render some data into the 'tera-hello-world.html template in examples/templates directory
+async fn index(ctx: Context<AppState>) -> EndpointResult {
+    // Create the context for the template
+    let mut context = tera::Context::new();
+    context.insert("page_title", "Hello from Tera templating!");
+    context.insert("points", &vec!["point1", "point2"]);
+
+    // Render the variables into the template
+    let s = ctx
+        .state()
+        .template
+        .render("tera-hello-world.html", &context)
+        .map_err(|err| {
+            // Map the tera::Error into a Tide error
+            let resp = http::Response::builder()
+                .status(500)
+                .body(err.description().into())
+                .unwrap();
+            Error::from(resp)
+        })?;
+
+    // Build normal response, putting the rendered string into bytes -> Body
+    let resp = http::Response::builder()
+        .header(http::header::CONTENT_TYPE, mime::TEXT_HTML.as_ref())
+        .status(http::StatusCode::OK)
+        .body(s.as_bytes().into())
+        .expect("Failed to build response");
+    Ok(resp)
+}
+
+fn main() -> Result<(), std::io::Error> {
+    let template_dir = format!("{}/examples/templates/*", env!("CARGO_MANIFEST_DIR"));
+
+    let state = AppState {
+        template: compile_templates!(&template_dir),
+    };
+
+    let mut app = App::with_state(state);
+    app.at("/").get(index);
+    app.run("127.0.0.1:8000")?;
+    Ok(())
+}