Marcos Kirsch c1ca93a78c Removed parameter that is no longer needed | 9 년 전 | |
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http | 9 년 전 | |
LICENSE | 9 년 전 | |
README.md | 9 년 전 | |
b64.lua | 9 년 전 | |
b64.py | 9 년 전 | |
httpserver-error.lua | 9 년 전 | |
httpserver-static.lua | 9 년 전 | |
httpserver.lua | 9 년 전 | |
init.lua | 9 년 전 | |
makefile | 9 년 전 |
A (very) simple web server written in Lua for the ESP8266 firmware NodeMCU.
Upload server files using luatool.py or equivalent. Or, even better, use GNU Make with the bundled makefile. Type the following to upload server, init, and some example files.
make upload
Add the following to your init.lua in order to start the server:
require("httpserver")
server = httpserver.start(80, 10)
In this example, 80 is the port your server is listening to, and 10 is the timeout (in seconds) for clients.
All the files you upload must be prefixed with «http/». Wait, what?
Yes: NodeMCU’s filesystem does not support folders, but filenames can contain slashes. Only files that begin with «http/» will be accessible through the server.
Example: Say the IP for your ESP8266 is 2.2.2.2 and the server is running in the default port 80. Go to http://2.2.2.2/index.html using your web browser. The ESP8266 will serve you with the contents of the file «http/myPage.html» (if it exists). If you visit the root (/) then index.html is served. By the way, unlike some http servers, the URLs are case-sensitive.
Similar to static files, upload a Lua script called «http/[name].lua where you replace [name] with the script’s name. The script should return a function that takes two parameters:
return function (connection, args)
-- code goes here
end
Use the connection parameter to send the response back to the client. Note that you are in charge of sending the HTTP header. The args parameter is a Lua table that contains any arguments sent by the client in the GET request.
For example, if the client requests http://2.2.2.2/foo.lua?color=red then the server will execute the function in your Lua script foo.lua and pass in connection and args, where args.color == «red».
The easiest is to look at some of the included example scripts.
File system doesn’t like long names, need to protect:
PANIC: unprotected error in call to Lua API (httpserver.lua:78: filename too long)
nodemcu firmware with floating point doesn’t have enough memory to compile nor run the server. See below.
Binary files haven’t been tested yet since luatool.py doesn’t support uploading anything but text files. If anyone has any luck with this, let us know!
The chip is very, very memory constrained. If you find yourself having trouble running the server or anything beyond the most trivial scripts, then try some of the following:
Use a recent build of nodemcu-firmware that supports node.compile(). Compiled Lua code has extension .lc and has smaller memory footprint. After uploading the server code (httpserver.lua) but before running anything, type:
node.compile("httpserver.lua")
If you can’t even compile the server code, then you may need a build of the firmware without floating point. In file nodemcu-firmware/app/lua/luaconf.h right around line 572 (line number may change in the future) add
#define LUA_NUMBER_INTEGRAL
Then rebuild and re-flash the firmware. But if you must have floating point numbers and run this server code, you may be out of luck.
Any help reducing the memory needs of the server without crippling its features are appreciated!