Add read_error() and has_read_error() methods to enhance error handling in streaming API

Author: yhirose

README-stream.md

@@ -135,6 +135,8 @@ auto result = httplib::stream::Get(cli, "/path", headers);
 | `status()` | `int` | HTTP status code |
 | `headers()` | `Headers&` | Response headers |
 | `body(chunk_size)` | `Generator<std::string_view>` | Generator yielding body chunks |
+| `read_error()` | `Error` | Get the last read error |
+| `has_read_error()` | `bool` | Check if a read error occurred |
 
 ### Generator Class
 

httplib-stream.h

@@ -279,6 +279,9 @@ class Result {
   // Get read error (socket direct mode only)
   Error read_error() const { return handle_.get_read_error(); }
 
+  // Check if a read error occurred
+  bool has_read_error() const { return handle_.has_read_error(); }
+
   // Streaming body access - returns Generator for lazy iteration
   Generator<std::string_view> body(size_t chunk_size = 8192) {
     return detail::stream_body(std::move(handle_), chunk_size);

test/test-stream.cc

@@ -288,6 +288,10 @@ TEST_F(StreamingServerTest, stream_Get_BodyIteration) {
     body.append(chunk);
   }
   EXPECT_EQ("Hello World!", body);
+
+  // No read error after successful read
+  EXPECT_FALSE(result.has_read_error());
+  EXPECT_EQ(httplib::Error::Success, result.read_error());
 }
 
 TEST_F(StreamingServerTest, stream_Get_ConnectionError) {