| Supported Targets | ESP32 | ESP32-C3 | ESP32-S2 | ESP32-S3 | | ----------------- | ----- | -------- | -------- | -------- | # HTTPD Server Persistent Sockets Example The Example consists of HTTPD server persistent sockets demo. This sort of persistency enables the server to have independent sessions/contexts per client. ## How to use example ### Hardware Required * A development board with ESP32/ESP32-S2/ESP32-C3 SoC (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](../../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. ### Test the example In order to test the HTTPD server persistent sockets demo : * run the test script "python scripts/adder.py \ \ \" * the provided test script sends (POST) numbers from 1 to N to the server which has a URI POST handler for adding these numbers into an accumulator that is valid throughout the lifetime of the connection socket, hence persistent * the script does a GET before closing and displays the final value of the accumulator See the README.md file in the upper level 'examples' directory for more information about examples. ## Example Output ``` I (9570) example_connect: - IPv4 address: 192.168.194.219 I (9580) example_connect: - IPv6 address: fe80:0000:0000:0000:266f:28ff:fe80:2c74, type: ESP_IP6_ADDR_IS_LINK_LOCAL I (9590) example: Starting server on port: '80' I (9600) example: Registering URI handlers I (12860) example: /adder visitor count = 1 I (12860) example: /adder PUT handler read 0 I (12860) example: /adder PUT allocating new session I (13070) example: /adder visitor count = 2 I (13070) example: /adder handler read 1 I (13090) example: /adder visitor count = 3 I (13090) example: /adder handler read 2 I (13110) example: /adder visitor count = 4 I (13110) example: /adder handler read 3 I (13170) example: /adder visitor count = 5 I (13170) example: /adder handler read 4 I (13190) example: /adder visitor count = 6 I (13190) example: /adder handler read 5 I (13210) example: /adder visitor count = 7 I (13210) example: /adder handler read 6 I (13270) example: /adder visitor count = 8 I (13270) example: /adder handler read 7 I (13290) example: /adder visitor count = 9 I (13290) example: /adder handler read 8 I (13300) example: /adder visitor count = 10 I (13310) example: /adder handler read 9 I (13370) example: /adder visitor count = 11 I (13370) example: /adder handler read 10 I (13390) example: /adder visitor count = 12 I (13390) example: /adder GET handler send 55 I (13420) example: /adder Free Context function called ```