Examples clear the HTTP message before reading

fix #1043

CHANGELOG.md

@@ -1,3 +1,9 @@
+Version 160:
+
+* Examples clear the HTTP message before reading
+
+--------------------------------------------------------------------------------
+
 Version 159:
 
 * Fix typo in release notes

doc/qbk/09_releases.qbk

@@ -114,6 +114,8 @@ to update to the latest Boost release.
 
 * Safe treatment of zero-length string arguments in basic_fields
 
+* ([issue 1043]) Examples clear the HTTP message before reading
+
 [*API Changes]
 
 * Remove unintended public members of

example/advanced/server-flex/advanced_server_flex.cpp

@@ -787,6 +787,10 @@ public:
         // Set the timer
         timer_.expires_after(std::chrono::seconds(15));
 
+        // Make the request empty before reading,
+        // otherwise the operation behavior is undefined.
+        req_ = {};
+
         // Read a request
         http::async_read(
             derived().stream(),

example/advanced/server/advanced_server.cpp

@@ -591,6 +591,10 @@ public:
         // Set the timer
         timer_.expires_after(std::chrono::seconds(15));
 
+        // Make the request empty before reading,
+        // otherwise the operation behavior is undefined.
+        req_ = {};
+
         // Read a request
         http::async_read(socket_, buffer_, req_,
             boost::asio::bind_executor(

example/http/server/async-ssl/http_server_async_ssl.cpp

@@ -311,6 +311,10 @@ public:
     void
     do_read()
     {
+        // Make the request empty before reading,
+        // otherwise the operation behavior is undefined.
+        req_ = {};
+
         // Read a request
         http::async_read(stream_, buffer_, req_,
             boost::asio::bind_executor(

example/http/server/async/http_server_async.cpp

@@ -287,6 +287,10 @@ public:
     void
     do_read()
     {
+        // Make the request empty before reading,
+        // otherwise the operation behavior is undefined.
+        req_ = {};
+
         // Read a request
         http::async_read(socket_, buffer_, req_,
             boost::asio::bind_executor(

example/http/server/stackless-ssl/http_server_stackless_ssl.cpp

@@ -320,6 +320,10 @@ public:
 
             for(;;)
             {
+                // Make the request empty before reading,
+                // otherwise the operation behavior is undefined.
+                req_ = {};
+
                 // Read a request
                 yield http::async_read(stream_, buffer_, req_,
                     boost::asio::bind_executor(

example/http/server/stackless/http_server_stackless.cpp

@@ -300,6 +300,10 @@ public:
         {
             for(;;)
             {
+                // Make the request empty before reading,
+                // otherwise the operation behavior is undefined.
+                req_ = {};
+
                 // Read a request
                 yield http::async_read(socket_, buffer_, req_,
                     boost::asio::bind_executor(