Can't Download Web Page Text Programmatically
Posted: Mon Feb 15, 2016 12:08 pmHi, i have an ESP-01 with a Lua Web Server, but i can't download the content of the Web Server via code, i have tried in C# and in Java (with android) but i get the same result.
This is the content of init.lua:
This is the code that i use in C# for downloading the web page content:
And i get:
My Visual Studio is in italian, the translation of the message is: The underlying connection was closed: unexpected connection close.
This is the code that i use in Android (i use the OkHttp Library):
And i get:
java.io.IOException: unexpected end of stream on Connection
With other url the code works perfectly, but with the web page of the ESP don't work.
Any solution? Thanks!
This is the content of init.lua:
Code: Select all
wifi.setmode(wifi.STATION)
wifi.sta.config("Gandalf","simonecleomartina")
uart.setup(0,9600,8,0,1)
print(wifi.sta.getip())
print ("uart.setup(0,9600,8,0,1) finished")
print ("waiting for serial data....")
tempst = "N.D.";
srv=net.createServer(net.TCP)
srv:listen(46,function(conn)
conn:on("receive", function(client,request)
local buf = "";
local _, _, method, path, vars = string.find(request, "([A-Z]+) (.+)?(.+) HTTP");
if(method == nil)then
_, _, method, path = string.find(request, "([A-Z]+) (.+) HTTP");
end
local _GET = {}
if (vars ~= nil)then
for k, v in string.gmatch(vars, "(%w+)=(%w+)&*") do
_GET[k] = v
end
end
buf = buf.."<h1> ESP8266 Web Server</h1>";
buf = buf.."<p>Temperatura "..tempst;
local _on,_off = "",""
if(_GET.pin == "Cancello")then
print("1");
elseif(_GET.pin == "Garage")then
print("2");
end
client:send(buf);
client:close();
collectgarbage();
end)
end)
function temp(value,decimal)
print("Temperatura("..value.."."..decimal..") ricevuta")
tempst = value.."."..decimal;
end
This is the code that i use in C# for downloading the web page content:
Code: Select all
int timeout = 5000;
SetAllowUnsafeHeaderParsing20();
HttpWebRequest myHttpWebRequest1 = (HttpWebRequest)WebRequest.Create(action);
myHttpWebRequest1.KeepAlive = false;
myHttpWebRequest1.ServicePoint.Expect100Continue = false;
myHttpWebRequest1.Timeout = timeout;
myHttpWebRequest1.ReadWriteTimeout = timeout;
myHttpWebRequest1.ServicePoint.MaxIdleTime = timeout;
myHttpWebRequest1.ServicePoint.ConnectionLeaseTimeout = timeout;
HttpWebResponse myHttpWebResponse1 = (HttpWebResponse)myHttpWebRequest1.GetResponse();
Stream receiveStream = myHttpWebResponse1.GetResponseStream();
Encoding enc = System.Text.Encoding.UTF8;
StreamReader loResponseStream = new StreamReader(receiveStream, enc);
And i get:
Code: Select all
System.Net.WebException non รจ stata gestita
HResult=-2146233079
Message=Connessione sottostante chiusa: Chiusura imprevista della connessione..
Source=System
StackTrace:
in System.Net.HttpWebRequest.GetResponse()
in Arduino.Form1.aggiornadati(String action) in C:\Users\PC-Simone\Desktop\New\Arduino\Form1.cs:riga 115
in Arduino.Form1.buttonCancello_Click(Object sender, EventArgs e) in C:\Users\PC-Simone\Desktop\New\Arduino\Form1.cs:riga 53
in System.Windows.Forms.Control.OnClick(EventArgs e)
in System.Windows.Forms.Button.OnClick(EventArgs e)
in System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
in System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
in System.Windows.Forms.Control.WndProc(Message& m)
in System.Windows.Forms.ButtonBase.WndProc(Message& m)
in System.Windows.Forms.Button.WndProc(Message& m)
in System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
in System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
in System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
in System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
in System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
in System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
in System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
in System.Windows.Forms.Application.Run(Form mainForm)
in Arduino.Program.Main() in C:\Users\PC-Simone\Desktop\New\Arduino\Program.cs:riga 18
in System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
in System.AppDomain.nExecuteAssembly(RuntimeAssembly assembly, String[] args)
in System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)
in System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()
in System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
in System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)
in System.Activator.CreateInstance(ActivationContext activationContext)
in Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
in System.Threading.ThreadHelper.ThreadStart_Context(Object state)
in System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
in System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
in System.Threading.ThreadHelper.ThreadStart()
InnerException:
My Visual Studio is in italian, the translation of the message is: The underlying connection was closed: unexpected connection close.
This is the code that i use in Android (i use the OkHttp Library):
Code: Select all
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(params[0])
.build();
Response response = client.newCall(request).execute();
String result = response.body().string();
And i get:
java.io.IOException: unexpected end of stream on Connection
With other url the code works perfectly, but with the web page of the ESP don't work.
Any solution? Thanks!