1. In async handler example, on hitting /long URI and closing the
connection forcefully from client (example ctrl + c) cause more stack
size (almost 200 bytes) than successfull request.
2. The connection should be closed from the server as soon as the client
closes the connect (i.e. handler should return ESP_FAIL to close the
connection)
This commit adds support for handling multiple requests simultaneously by introducing two new functions: `httpd_req_async_handler_begin()` and `httpd_req_async_handler_complete()`. These functions allow creating an asynchronous copy of a request that can be used on a separate thread and marking the asynchronous request as completed, respectively.
Additionally, a new flag `for_async_req` has been added to the `httpd_sess_t` struct to indicate if a socket is being used for an asynchronous request and should not be purged from the LRU cache.
An example have been added to demonstrate the usage of these new functions.
Closes https://github.com/espressif/esp-idf/issues/10594
Signed-off-by: Harshit Malpani <harshit.malpani@espressif.com>
