esp-idf/examples/protocols/http_server/simple/README.md

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# Simple HTTPD Server Example
The Example consists of HTTPD server demo with demostration of URI handling :
1. URI \hello for GET command returns "Hello World!" message
2. URI \echo for POST command echoes back the POSTed message
* Run `make menuconfig` (or `idf.py menuconfig` if using CMake build system) to configure Wi-Fi or Ethernet. See "Establishing Wi-Fi or Ethernet Connection" section in [examples/protocols/README.md](../../README.md) for more details.
* In order to test the HTTPD server persistent sockets demo :
1. compile and burn the firmware "make flash"
2. run "make monitor" and note down the IP assigned to your ESP module. The default port is 80
3. test the example :
* run the test script : "python2 scripts/client.py \<IP\> \<port\> \<MSG\>"
* the provided test script first does a GET \hello and displays the response
* the script does a POST to \echo with the user input \<MSG\> and displays the response
* or use curl (asssuming IP is 192.168.43.130):
1. "curl 192.168.43.130:80/hello" - tests the GET "\hello" handler
2. "curl -X POST --data-binary @anyfile 192.168.43.130:80/echo > tmpfile"
* "anyfile" is the file being sent as request body and "tmpfile" is where the body of the response is saved
* since the server echoes back the request body, the two files should be same, as can be confirmed using : "cmp anyfile tmpfile"
3. "curl -X PUT -d "0" 192.168.43.130:80/ctrl" - disable /hello and /echo handlers
4. "curl -X PUT -d "1" 192.168.43.130:80/ctrl" - enable /hello and /echo handlers
See the README.md file in the upper level 'examples' directory for more information about examples.