Lua captive portal error: infinite loading

2016-11-18 10:20:49

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我使用的是nodeMCU的ESP8266芯片，这是一个开源固件，它让我可以在芯片内编程Lua脚本。

我正在将其用作捕获门户，并且我只想从用户名密码表单中记录txt文件数据。我编写了代码，但是当我连接到wifi并被重定向到门户页面时，我会无限制地加载，而且主页永远不会加载。

我无法弄清楚原因，这是我的lua代码

srv=net.createServer(net.TCP)
srv:listen(80,function(conn)

   local rnrn=0
   local Status = 0
   local DataToGet = 0
   local method=""
   local url=""
   local vars=""

  conn:on("receive",function(conn,payload)

    if Status==0 then
        _, _, method, url, vars = string.find(payload, "([A-Z]+) /([^?]*)%??(.*) HTTP")
        -- print(method, url, vars)
    end

    if url==nil then
        url="index.htm"
    end

    if url=="" then
        url="index.htm"
    end

    -- some ugly magic for Apple IOS Devices
    if string.find(url, "/") ~= nil then
     --print ("Slash found")
     local invurl=string.reverse(url)
     local a,b=string.find(invurl, "/", 1)
     url=string.sub(url, string.len(url)-(a-2))
     --print ("Neue URL= " .. url)
    end

    if string.len(url)>= 25 then
        url = string.sub (url,1,25)
    --  print ("cut down URL")
    end

    DataToGet = -1

    if url == "favicon.ico" then
        conn:send("HTTP/1.1 404 file not found")
        return
    end

    conn:send("HTTP/1.1 200 OK\r\n\r\n")

    if url=="login.htm" then
        loginPage()
        conn:close()
        return
    end

    if url=="logData" then
        loginPage()
        -- save data in a file
        file.open("log.txt", "w+")
        file.write(vars)
        file.flush()
        file.close()
        conn:close()
        return
    end

    local foundmatch = 0
    local a = {'wumpus.htm','index.htm','about.htm','ttt.htm','instruct.htm','status.htm','kg-small.png','talk.htm','hovercraft.mp3','test.pdf'}
    for _,v in pairs(a) do
        if v == url then
            foundmatch=1
            -- print ("Found " .. v)
            break
        end
    end

if foundmatch == 0 then
    -- print ("Found no match, setting index")
    url="index.htm"
end

 end)

end)

function loginPage()
    conn:send("<html><body><h1>登录</h1>")
    conn:send("<form action='logData' method='post'><label for='un'>用户名:</label><input type='text' name='un' /><label for='pw'>密码:</label><input type='password' name='pw' /><input type='submit' name='submit' value='提交' /></form>")
    conn:send("</body></html>")
end
print("HTTP服务器正在监听。可用堆栈：", node.heap())

用户7181902

我为这个展示编辑的登录页面，但显然它不是唯一的错误。
JankoP

function loginPage(conn)
    conn:send('HTTP/1.1 200 OK\r\n\r\n<html><body><h1>Login</h1>'..
    '<form action="logData" method="post"><label for="un">Username:</label>'..
    '<input type="text" name="un" /><label for="pw">Password:</label>'..
    '<input type="password" name="pw" /><input type="submit" name="submit" value="Submit" /></form>'..
    '</body></html>')
end

srv=net.createServer(net.TCP)
srv:listen(80,function(conn)
    local rnrn=0
    local Status = 0
    local DataToGet = 0
    local method=""
    local url=""
    local vars=""
    
    conn:on("receive",function(conn,payload)
        if Status==0 then
            _, _, method, url, vars = string.find(payload, "([A-Z]+) /([^?]*)%??(.*) HTTP")
            print(method, url, vars)
        end
        
        if url==nil then
            url="index.htm"
        end
        
        if url=="" then
            url="index.htm"
        end
        
        -- some ugly magic for Apple IOS Devices
        if string.find(url, "/") ~= nil then
            --print ("Slash found")
            local invurl=string.reverse(url)
            local a,b=string.find(invurl, "/", 1)
            url=string.sub(url, string.len(url)-(a-2))
            --print ("Neue URL= " .. url)
        end
        
        if string.len(url)>= 25 then
            url = string.sub (url,1,25)
            --  print ("cut down URL")
        end
        
        DataToGet = -1
        
        if url == "favicon.ico" then
            conn:send("HTTP/1.1 404 file not found")
            return
        end
        
        if url=="login.htm" then
            loginPage(conn)
            conn:on("sent", function(conn) conn:close() end)
            return
        end
        
        if url=="logData" then
            loginPage(conn)
            -- save data in a file
            file.open("log.txt", "w+")
            file.write(vars)
            file.flush()
            file.close()
            conn:on("sent", function(conn) conn:close() end)
            return
        end
        
        local foundmatch = 0
        local a = {'wumpus.htm','index.htm','about.htm','ttt.htm','instruct.htm','status.htm','kg-small.png','talk.htm','hovercraft.mp3','test.pdf'}
        for _,v in pairs(a) do
            if v == url then
                foundmatch=1
                -- print ("Found " .. v)
                break
            end
        end
        
        if foundmatch == 0 then
            -- print ("Found no match, setting index")
            url="index.htm"
        end
        
    end)
    
end)

print("HTTP Server is now listening. Free Heap:", node.heap())

```

2016-11-19 10:43:01

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作者:

用户4990786

Lua captive portal error: infinite loading

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