Fix ensure! calls

Author: yoshuawuyts

src/client.rs

@@ -146,7 +146,7 @@ where
     loop {
         let bytes_read = reader.read_until(b'\n', &mut buf).await?;
         // No more bytes are yielded from the stream.
-        assert_eq!(bytes_read, 0, "Empty response"); // TODO: ensure_eq?
+        assert!(bytes_read != 0, "Empty response"); // TODO: ensure?
 
         // We've hit the end delimiter of the stream.
         let idx = buf.len() - 1;
@@ -184,7 +184,7 @@ where
     let transfer_encoding = res.header(&TRANSFER_ENCODING);
 
     http_types::ensure!(
-        content_length.is_some() && transfer_encoding.is_some(),
+        content_length.is_none() || transfer_encoding.is_none(),
         "Unexpected Content-Length header"
     );
 

src/date.rs

@@ -113,7 +113,7 @@ fn parse_imf_fixdate(s: &[u8]) -> Result<HttpDate, Error> {
 fn parse_rfc850_date(s: &[u8]) -> Result<HttpDate, Error> {
     // Example: `Sunday, 06-Nov-94 08:49:37 GMT`
     ensure!(
-        s.len() < RFC850_MAX_LENGTH,
+        s.len() >= RFC850_MAX_LENGTH,
         "Date time not in rfc850 format"
     );
 

src/server.rs

@@ -363,7 +363,7 @@ where
     // Convert our header buf into an httparse instance, and validate.
     let status = httparse_req.parse(&buf)?;
 
-    ensure!(status.is_partial(), "Malformed HTTP head");
+    ensure!(!status.is_partial(), "Malformed HTTP head");
 
     // Convert httparse headers + body into a `http::Request` type.
     let method = httparse_req.method;
@@ -389,7 +389,7 @@ where
     let transfer_encoding = req.header(&TRANSFER_ENCODING);
 
     http_types::ensure!(
-        content_length.is_some() && transfer_encoding.is_some(),
+        content_length.is_none() || transfer_encoding.is_none(),
         "Unexpected Content-Length header"
     );