WebServerMicrodot < IoT_Course

Tags: view all tags
---+ The microdot web server framework

In contrast to _picoweb_, _microdot_ supplies extensive [[https://microdot.readthedocs.io/en/latest/][documentation]]. It is a good idea to read this documentation carefully and compare it with the example programs provided.

You can download the microdot repository from github: https://github.com/miguelgrinberg/microdot.<br />In order to run the examples using the modules included in your !MicroPython interpreter, you must make some minor changes to them:
   * when importing microdot please replace
      * from _microdot import Microdot_ by <i>from microdot.microdot import Microdot <br /></i>The same is true for the other modules (microdot_asyncio, microdot_ssl, microdot websockets ...)
   * You should connect to your !WiFi network, before starting the server:
      * from wifi_connect import connect, getIPAddress
      * connect(ssid="yourSSID",password="yourPassword")
   * Please start the server with
      * app.run(debug=True,host=getIPAddress,port=80) # debug=True is optional, host defines the IP address of your server, port 80 is the standard HTTP port
   * You may add the following print statement before app.run, which will produce a link allowing you to easily start the WEB browser with the correct server address:
      * print("Starting WEB server on !http://" + getIPAddress())
---++ The microdot exercises

You can implement the same programs as shown on the [[WEB Server Picoweb]] page also with microdot. While picoweb does not provide support for web sockets, microdot does. Please git it a try, starting off with the examples provided in the github repository. The exercise sheet ([[A WEB server]]) is now based on microdot.
---++ Server side events on microdot

microdot does not support server side events out of the box. When using server side events, your web server should first send:
<verbatim>"HTTP/1.0 200 OK\r\n"
"Content-Type: text/event-stream\r\n"
"\r\n"</verbatim>

before sending a stream of information.

I added a method send_evt_src_header() to the Microdot class, which does exactly this. After calling send_evt_src_header() you may return an iterator, which will repeatedly send information to the client (see the Fibonacci example in the documentation).

-- %USERSIG{UliRaich - 2022-11-12}%

---++ Comments

%COMMENT%
Topic revision: r2 - 2022-11-16 - UliRaich