11 replies to this topic

[hego555]

You guys think it is possible to make a small web browser in Lua?

Like text based basically...

Ideas/Comments welcome!

[Lyqyd]

Yes, it is definitely possible. It's going to be fairly time-consuming, though. Even if you just make a browser that can handle HTML 4.0, no JavaScript etc., you're looking at having to put together a full parser for HTML (unless you can find one and adapt it--unlikely) that can create text on the screen that bears some resemblance to the actual web page.

This is not any easy one, but it most certainly is possible.

[Cranium]

I know some people have made a miniature web browser already in CC. It does not use the HTTP API, but you can probably make something with the HTTP if you wanted.

[Noodle]

Lua is good for this stuff! Get the xml reader and it'll operate just like it. It'll take the tags out of them and css won't be much of use, but surely you could make one.

Spoiler

function parseargs (s)
local arg = {}
gsub(s, "(%w+)=(["'])(.-)%2", function (w, _, a)
%arg[w] = a
end)
return arg
end

function collect (s)
local stack = {n=0}
local top = {n=0}
tinsert(stack, top)
local ni,c,label,args, empty
local i, j = 1, 1
while 1 do
ni,j,c,label,args, empty = strfind(s, "<(%/?)([%w:]+)(.-)(%/?)>", i)
if not ni then break end
local text = strsub(s, i, ni-1)
if not strfind(text, "^%s*$") then
tinsert(top, text)
end
if empty == "/" then -- empty element tag
tinsert(top, {n=0, label=label, args=parseargs(args), empty=1})
elseif c == "" then -- start tag
top = {n=0, label=label, args=parseargs(args)}
tinsert(stack, top) -- new level
else -- end tag
local toclose = tremove(stack) -- remove top
top = stack[stack.n]
if stack.n < 1 then
error("nothing to close with "..label)
end
if toclose.label ~= label then
error("trying to close "..toclose.label.." with "..label)
end
tinsert(top, toclose)
end
i = j+1
end
local text = strsub(s, i)
if not strfind(text, "^%s*$") then
tinsert(stack[stack.n], text)
end
if stack.n > 1 then
error("unclosed "..stack[stack.n].label)
end
return stack[1]
end


-- example

x = collect[[
<methodCall kind="xuxu">
<methodName>examples.getStateName</methodName>
<params>
<param>
<value><i4>41</i4></value>
</param>
</params>
</methodCall>
]]

From the LuaXml place

[hego555]

I was thinking creating a new semi-language for the web browser, so the websites and computers can interact and send and receive commands or really anything!

[Cranium]

If you feel like creating that language, yes. If you want to create a new "rednet standard protocol", then by all means, do so. That is the magic of Lua, it can work with ANYTHING.

[Cranium]

Just make sure you include THIS.

[hego555]

Cranium, on 19 September 2012 - 10:46 PM, said:

If you feel like creating that language, yes. If you want to create a new "rednet standard protocol", then by all means, do so. That is the magic of Lua, it can work with ANYTHING.

Only problem I can think of is styling!!!

See the problem is, I cant really think of a way to lets say move text to the right side of the screen, or the middle, or both!

Like this

------------------------------------------------------------------
LEFT SIDE MIDDLE RIGHT SIDE
------------------------------------------------------------------

[Cranium]

*Ahem*
I'll just leave this shameless self plug here..... />

[hego555]

Hmm, I will install that on the server!!!

All is falling into place, but I frankly dont want dependencies!
aw well!

[Jan]

Cranium, on 19 September 2012 - 10:52 PM, said:

Just make sure you include THIS.

That' s not a bad idea:
When you have industrialcraft (which has coffee now), you can warm your coffee via rednet! HAYO!

[Noodle]

Styling is easy with tags..

x, y = term.getSize()
If tag == "<center>" then
  (x/2) - (string.len(INNERTEXT)/2)
  print(INNERTEXT)
end