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1. In httpd_req_async_handler_begin, the httpd_req_aux is locally malloced and data is done memcpy to local httpd_req_aux from request'ss httpd_req_aux for async request use-case, this causes scartch pointer from these two structs pointing to same memory address. 2. In current workflow, the request's sratch buffer is freed in httpd_parse.c httpd_req_cleanup api. Therefore if the user try to fetch the data (like headers) from the scratch buffer, data will be not available. 3. Each request should have the deep copy of the scratch buffer. To retrive the data later. Closes https://github.com/espressif/esp-idf/issues/15587
| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
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Async Requests Handlers HTTPD Server Example
The Example demonstrates how to handle multiple long running simultaneous requests within the HTTPD server. It has the following URIs:
1. URI \long for demonstrating async requests running in the background
2. URI \quick for demonstrating that quick requests are still responsive
2. URI \ index page
How to use example
Hardware Required
- An ESP-Dev-Board (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
- A USB cable for power supply and programming
Configure the project
idf.py menuconfig
- Open the project configuration menu (
idf.py menuconfig) to configure Wi-Fi or Ethernet. See "Establishing Wi-Fi or Ethernet Connection" section in examples/protocols/README.md for more details.
Build and Flash
Build the project and flash it to the board, then run monitor tool to view serial output:
idf.py -p PORT flash monitor
(Replace PORT with the name of the serial port to use.)
(To exit the serial monitor, type Ctrl-].)
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
Example Output
I (14257) example_common: Connected to example_netif_sta
I (14267) example_common: - IPv4 address: 192.168.20.85,
I (14277) example_common: - IPv6 address: fe80:0000:0000:0000:7edf:a1ff:fea4:3454, type: ESP_IP6_ADDR_IS_LINK_LOCAL
I (14287) example: starting async req task worker
I (14287) example: starting async req task worker
I (14297) example: Starting server on port: '80'
I (14307) example: Registering URI handlers
I (14307) main_task: Returned from app_main()
I (15547) wifi:<ba-add>idx:1 (ifx:0, 68:d7:9a:81:26:1e), tid:0, ssn:0, winSize:64
I (19627) example: uri: /
I (25877) example: uri: /quick
I (33247) example: uri: /long
I (33247) example: invoking /long
I (33247) example: uri: /long