support async gzip decoding

tests/async.rs

@@ -0,0 +1,77 @@
+#![cfg(feature="unstable")]
+
+extern crate futures;
+extern crate tokio_core;
+extern crate tokio_io;
+extern crate reqwest;
+extern crate libflate;
+
+#[macro_use]
+mod support;
+
+use futures::{Future, Stream};
+use tokio_core::reactor::Core;
+use std::io::Write;
+use std::time::Duration;
+
+#[test]
+fn async_test_gzip_response() {
+    test_gzip(10_000, 4096);
+}
+
+#[test]
+fn async_test_gzip_single_byte_chunks() {
+    test_gzip(10, 1);
+}
+
+fn test_gzip(response_size: usize, chunk_size: usize) {
+    let content: String = (0..response_size).into_iter().map(|i| format!("test {}", i)).collect();
+    let mut encoder = ::libflate::gzip::Encoder::new(Vec::new()).unwrap();
+    match encoder.write(content.as_bytes()) {
+        Ok(n) => assert!(n > 0, "Failed to write to encoder."),
+        _ => panic!("Failed to gzip encode string."),
+    };
+
+    let gzipped_content = encoder.finish().into_result().unwrap();
+
+    let mut response = format!("\
+            HTTP/1.1 200 OK\r\n\
+            Server: test-accept\r\n\
+            Content-Encoding: gzip\r\n\
+            Content-Length: {}\r\n\
+            \r\n", &gzipped_content.len())
+        .into_bytes();
+    response.extend(&gzipped_content);
+
+    let server = server! {
+        request: b"\
+            GET /gzip HTTP/1.1\r\n\
+            Host: $HOST\r\n\
+            User-Agent: $USERAGENT\r\n\
+            Accept: */*\r\n\
+            Accept-Encoding: gzip\r\n\
+            \r\n\
+            ",
+        chunk_size: chunk_size,
+        write_timeout: Duration::from_millis(10),
+        response: response
+    };
+
+    let mut core = Core::new().unwrap();
+
+    let client = reqwest::unstable::async::Client::new(&core.handle()).unwrap();
+
+    let res_future = client.get(&format!("http://{}/gzip", server.addr()))
+        .unwrap()
+        .send()
+        .and_then(|mut res| res.body().concat2())
+        .and_then(|buf| {
+            let body = ::std::str::from_utf8(&buf).unwrap();
+
+            assert_eq!(body, &content);
+
+            Ok(())
+        });
+
+    core.run(res_future).unwrap();
+}