fix(core): Handling content encoding correctly

core/src/raw/http_util/client.rs

@@ -26,6 +26,7 @@ use http::Request;
 use http::Response;
 
 use super::body::IncomingAsyncBody;
+use super::parse_content_encoding;
 use super::parse_content_length;
 use super::AsyncBody;
 use crate::raw::*;
@@ -167,11 +168,13 @@ impl HttpClient {
         })?;
 
         // Get content length from header so that we can check it.
-        // If the request method is HEAD, we will ignore this.
-        let content_length = if is_head {
+        //
+        // - If the request method is HEAD, we will ignore content length.
+        // - If response contains content_encoding, we should omit it's content length.
+        let content_length = if is_head || parse_content_encoding(resp.headers())?.is_some() {
             None
         } else {
-            parse_content_length(resp.headers()).expect("response content length must be valid")
+            parse_content_length(resp.headers())?
         };
 
         let mut hr = Response::builder()

core/src/raw/http_util/header.rs

@@ -19,14 +19,14 @@ use base64::engine::general_purpose;
 use base64::Engine;
 use chrono::DateTime;
 use chrono::Utc;
-use http::header::CACHE_CONTROL;
 use http::header::CONTENT_DISPOSITION;
 use http::header::CONTENT_LENGTH;
 use http::header::CONTENT_RANGE;
 use http::header::CONTENT_TYPE;
 use http::header::ETAG;
 use http::header::LAST_MODIFIED;
 use http::header::LOCATION;
+use http::header::{CACHE_CONTROL, CONTENT_ENCODING};
 use http::HeaderValue;
 use http::{HeaderMap, HeaderName};
 use md5::Digest;
@@ -77,6 +77,11 @@ pub fn parse_content_type(headers: &HeaderMap) -> Result<Option<&str>> {
     parse_header_to_str(headers, CONTENT_TYPE)
 }
 
+/// Parse content encoding from header map.
+pub fn parse_content_encoding(headers: &HeaderMap) -> Result<Option<&str>> {
+    parse_header_to_str(headers, CONTENT_ENCODING)
+}
+
 /// Parse content range from header map.
 pub fn parse_content_range(headers: &HeaderMap) -> Result<Option<BytesContentRange>> {
     parse_header_to_str(headers, CONTENT_RANGE)?

core/src/raw/http_util/mod.rs

@@ -35,6 +35,7 @@ pub use header::format_authorization_by_basic;
 pub use header::format_authorization_by_bearer;
 pub use header::format_content_md5;
 pub use header::parse_content_disposition;
+pub use header::parse_content_encoding;
 pub use header::parse_content_length;
 pub use header::parse_content_md5;
 pub use header::parse_content_range;