Arduino won't extract the info I need from Web Server

I have an Arudino UNO R3 & a SIMCOM SIM808 GSM/GPRS/GPS Shield. Since the libraries used in the examples given here on Arduino site didn’t work, I had to refer to the library given here on GitHub.

I ran the GSM_Client_Library from the example given there… Filled in all my details like APN, USERNAME, PASSWORD & blah blah… But I’m not getting what I want. My Arduino program is detailed below:

#include "SIM900.h"
#include <SoftwareSerial.h>
#include "inetGSM.h"
//#include "sms.h"
//#include "call.h"

//To change pins for Software Serial, use the two lines in GSM.cpp.

//GSM Shield for Arduino
//www.open-electronics.org
//this code is based on the example of Arduino Labs.

//Simple sketch to start a connection as client.

InetGSM inet;
//CallGSM call;
//SMSGSM sms;

char* content;
char msg[50];
int numdata;
char inSerial[50];
int i=0;
boolean started=false;

void setup()
{
     //Serial connection.
     Serial.begin(9600);
     Serial.println("GSM Shield testing.");
     //Start configuration of shield with baudrate.
     //For http uses is raccomanded to use 4800 or slower.
     if (gsm.begin(2400)) {
          Serial.println("\nstatus=READY");
          started=true;
     } else Serial.println("\nstatus=IDLE");

     if(started) {
          //GPRS attach, put in order APN, username and password.
          //If no needed auth let them blank.
          if (inet.attachGPRS("TATA.DOCOMO.INTERNET", "", ""))
               Serial.println("status=ATTACHED");
          else Serial.println("status=ERROR");
          delay(1000);

          //Read IP address.
          gsm.SimpleWriteln("AT+CIFSR");
          delay(5000);
          //Read until serial buffer is empty.
          gsm.WhileSimpleRead();

          //TCP Client GET, send a GET request to the server and
          //save the reply.
          numdata=inet.httpGET("www.boat.esy.es", 80, "/output.txt", msg, 50);
          //Print the results.
          Serial.println("\nNumber of data received:");
          Serial.println(numdata);
          Serial.println("\nData received:");
          Serial.println(msg);
          content = strstr(msg,"\r\n\r\n"); // PROBLEM STARTS HERE..
          content = content + 4;
          if(content == NULL)
            Serial.println("ERROR!! Nothing was read into Content!!"); //THIS NEVER GETS EXECUTED
          else
            Serial.println(content); //THIS NEVER GETS EXECUTED
     }
};

void loop()
{
     //Read for new byte on serial hardware,
     //and write them on NewSoftSerial.
     serialhwread();
     //Read for new byte on NewSoftSerial.
     serialswread();
};

void serialhwread()
{
     i=0;
     if (Serial.available() > 0) {
          while (Serial.available() > 0) {
               inSerial[i]=(Serial.read());
               delay(10);
               i++;
          }

          inSerial[i]='\0';
          if(!strcmp(inSerial,"/END")) {
               Serial.println("_");
               inSerial[0]=0x1a;
               inSerial[1]='\0';
               gsm.SimpleWriteln(inSerial);
          }
          //Send a saved AT command using serial port.
          if(!strcmp(inSerial,"TEST")) {
               Serial.println("SIGNAL QUALITY");
               gsm.SimpleWriteln("AT+CSQ");
          }
          //Read last message saved.
          if(!strcmp(inSerial,"MSG")) {
               Serial.println(msg);
          } else {
               Serial.println(inSerial);
               gsm.SimpleWriteln(inSerial);
          }
          inSerial[0]='\0';
     }
}

void serialswread()
{
     gsm.SimpleRead();
}

And this is the OUTPUT I’m getting

GSM Shield testing.

status=READY
status=ATTACHED

100.106.251.203
HTTP/1.1
Number of data received:
50

Data received:
HTTP/1.1
` À
 200 OK
Date: Sun, 05 Jun 2016 08:35:38 GMT
Server: Apache
Last-Modified: Sat, 04 Jun 2016 23:23:33 GMT
Accept-Ranges: bytes
Content-Length: 3
Connection: close
Content-Type: text/plain

1 //THE VALUE I WANT
1 //THE VALUE I WANT
CLOSED  //NO WHERE IN MY PROGRAM HAVE I SEEN THE "CLOSED" THING. IT MUST BE COMING FROM ONE OF THE LIBRARIES.

What I’m trying to do here: I’m trying to separate the content of the response from the header of it, which is why I used \r\n\r\n. But nothing is getting copied to content. This part never even executes. I just want the values 11 from my response & store in in a string variable. But I have tried several times, nothing happens. Please help.

Thank you for your time!!

You are wrong

         content = strstr(msg,"\r\n\r\n");
          content = content + 4;
          if(content == NULL)
            Serial.println("ERROR!! Nothing was read into Content!!");
          else
            Serial.println(content); //THIS NEVER GETS EXECUTED

The else part gets executed ALWAYS.

Even if strstr returned NULL, you add 4 to the result and compare that to NULL.

//NO WHERE IN MY PROGRAM HAVE I SEEN THE "CLOSED" THING. IT MUST BE COMING FROM ONE OF THE LIBRARIES.

So, have you looked at the library sources to see where that text might be generated?