71 lines
1.6 KiB
Lua
71 lines
1.6 KiB
Lua
-- Test sjson and GitHub API
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local s = tls.createConnection()
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s:on("connection", function(sck, c)
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sck:send("GET /repos/nodemcu/nodemcu-firmware/git/trees/master HTTP/1.0\r\nUser-agent: nodemcu/0.1\r\nHost: api.github.com\r\nConnection: close\r\nAccept: application/json\r\n\r\n")
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end)
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function startswith(String, Start)
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return string.sub(String, 1, string.len(Start)) == Start
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end
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local seenBlank = false
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local partial
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local wantval = { tree = 1, path = 1, url = 1 }
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-- Make an sjson decoder that only keeps certain fields
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local decoder = sjson.decoder({
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metatable =
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{
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__newindex = function(t, k, v)
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if wantval[k] or type(k) == "number" then
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rawset(t, k, v)
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end
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end
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}
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})
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local function handledata(s)
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decoder:write(s)
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end
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-- The receive callback is somewhat gnarly as it has to deal with find the end of the header
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-- and having the newline sequence split across packets
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s:on("receive", function(sck, c)
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if partial then
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c = partial .. c
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partial = nil
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end
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if seenBlank then
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handledata(c)
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return
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end
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while c do
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if startswith(c, "\r\n") then
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seenBlank = true
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c = c:sub(3)
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handledata(c)
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return
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end
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local s, e = c:find("\r\n")
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if s then
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-- Throw away line
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c = c:sub(e + 1)
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else
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partial = c
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c = nil
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end
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end
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end)
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local function getresult()
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local result = decoder:result()
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-- This gets the resulting decoded object with only the required fields
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print(result['tree'][4]['path'], "is at",
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result['tree'][4]['url'])
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end
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s:on("disconnection", getresult)
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s:on("reconnection", getresult)
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-- Make it all happen!
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s:connect(443, "api.github.com")
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