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example-http-server.forth
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example-http-server.forth
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\ server listens on this port
80 constant: PORT
wifi-ip constant: HOST
\ task local variables
struct
cell field: .client
128 field: .line
constant: WorkerSpace
\ access to task local variables from worker tasks
: client ( -- a ) user-space .client ;
: line ( -- a ) user-space .line ;
\ a mailbox used for communication between server and worker tasks
4 mailbox: connections
\ server and worker task allocations
0 task: server-task
WorkerSpace task: worker-task1
WorkerSpace task: worker-task2
\ server task listens for incoming connections and passes them to the workers
: server ( task -- )
activate
PORT HOST netcon-tcp-server
begin
print: "Waiting for clients on host " HOST type print: " on port " PORT . cr
dup netcon-accept
connections mailbox-send \ send the client connection to one of the worker tasks
again
deactivate ;
\ index page as a mult line string
str: "
HTTP/1.0 200\r\n
Content-Type: text/html\r\n
Connection: close\r\n
\r\n
<html>
<body>
<h1>Punyforth demo</h1>
</body>
</html>" constant: HTML
: serve-client ( -- )
client @ 128 line netcon-readln
print: 'received: ' line type print: ' len=' . cr
line str: "GET /" str-starts? if
client @ HTML netcon-write
then ;
\ worker taks receives clients from the server task then serves them with a static html
: worker ( task -- )
activate
begin
connections mailbox-receive client ! \ receive client connection from the server task
print: "Client connected: " client ? cr
['] serve-client catch ?dup if
print: 'error handling client: ' client ? cr
ex-type
then
client @ netcon-dispose
again
deactivate ;
: start-http-server ( -- )
multi \ switch to multi task mode then start the server + worker taks
server-task server
worker-task1 worker
worker-task2 worker ;
start-http-server