473,671 Members | 2,557 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Null return

41 New Member
I'm writing a program to get a MD5 hash from web page data. The hash part is working fine, but I'm having troubles getting the web page data. I threw up a couple messageboxes and I'm getting a null string return, so I'm hashing nothing. Anyone see where the problem might be? Thanks!

Expand|Select|Wrap|Line Numbers
  1. using System;
  2. using System.IO;
  3. using System.Net;
  4. using System.Text;
  5.  
  6. namespace WebFetch
  7. {
  8.     public class SiteData
  9.  
  10.     {
  11.         static StringBuilder sb = new StringBuilder();
  12.         public static String SB
  13.         {
  14.             get
  15.             {
  16.                 return sb.ToString();
  17.             }
  18.         }
  19.  
  20.         static void Main(string[] args)
  21.         {
  22.             byte[] buf = new byte[8192];
  23.  
  24.             HttpWebRequest request = (HttpWebRequest)
  25.                 WebRequest.Create("http://www.google.com");
  26.  
  27.             HttpWebResponse response = (HttpWebResponse)
  28.                 request.GetResponse();
  29.  
  30.             Stream resStream = response.GetResponseStream();
  31.  
  32.             string tempString = null;
  33.             int count = 0;
  34.  
  35.             do
  36.             {
  37.                 count = resStream.Read(buf, 0, buf.Length);
  38.  
  39.                 if (count != 0)
  40.                 {
  41.                     tempString = Encoding.ASCII.GetString(buf, 0, count);
  42.  
  43.                     sb.Append(tempString);
  44.                 }
  45.             }
  46.             while (count > 0); // any more data to read?
  47.  
  48.             Console.WriteLine(sb.ToString());
  49.  
  50.         }
  51.         public override string ToString()
  52.         {
  53.             return sb.ToString();
  54.         }
  55.     }
  56. }
Expand|Select|Wrap|Line Numbers
  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;
  9. using WebFetch;
  10.  
  11. namespace Md5HashGenerator
  12. {
  13.  
  14.     public partial class Form1 : Form
  15.     {
  16.         public Form1()
  17.         {
  18.             InitializeComponent();
  19.             MessageBox.Show(WebFetch.SiteData.SB);
  20.         }
  21.  
  22.         private void button1_Click(object sender, EventArgs e)
  23.         {
  24.             SiteData data = new SiteData();
  25.             MessageBox.Show(data.ToString());
  26.             richTextBox1.Text = GetMD5Hash(data.ToString());
  27.  
  28.             }
  29.         public string GetMD5Hash(string input)
  30.         {
  31.             System.Security.Cryptography.MD5CryptoServiceProvider x = new System.Security.Cryptography.MD5CryptoServiceProvider();
  32.             byte[] bs = System.Text.Encoding.UTF8.GetBytes(input);
  33.             bs = x.ComputeHash(bs);
  34.             System.Text.StringBuilder s = new System.Text.StringBuilder();
  35.             foreach (byte b in bs)
  36.             {
  37.                 s.Append(b.ToString("x2").ToLower());
  38.             }
  39.             string password = s.ToString();
  40.             return password;
  41.         }
  42.  
  43.  
  44.     }    
  45. }
  46.  
Jul 28 '09 #1
2 2130
Plater
7,872 Recognized Expert Expert
Well its a long shot, but you bomb out of your loop whenever count < = 0. What if not all the data has arrived yet (or none as apprived yet) and you read a zero because its not there yet? You exit out of the loop prematurely.
Try sticking an Application.DoE vents(); inside your loop somewhere. See if that helps any?
Jul 28 '09 #2
jmprescott
41 New Member
That helped. It was never entering main, so nothing was happening.

Fixed, thank you :)
Jul 29 '09 #3

Sign in to post your reply or Sign up for a free account.

Similar topics

13
3075
by: Don Vaillancourt | last post by:
What's going on with Javascript. At the beginning there was the "undefined" value which represented an object which really didn't exist then came the null keyword. But yesterday I stumbled across "null" string. I know that I will get an "undefined" when I try to retrieve something from the DOM which doesn't exist. I have used null myself to initialize or reset variables. But in which
14
2699
by: William Ahern | last post by:
is this legal: FILE *func(void) { extern int errno; return (errno = EINVAL, NULL); } my compiler (gcc 2.9.x on openbsd) is complaining that i'm returning a pointer from int w/o a cast. gcc 3.x on linux, however, never made a peep
16
1912
by: fix | last post by:
Hi all, I am new to C and I just started to program for a homework. I included my code down there. It is a fraction "class". I declared the Fraction struct, tried to create some invalid fraction, with denominator zero. A Fraction is created by the newFraction() function, and which in turns call normalize() function to simplify it, but before, the normalize() function will do a check, if the denominator is zero, it will give a error by...
2
1683
by: Jongmin | last post by:
Hi, I have made two classes, which are simple and almost same, T_A and T_B. T_A has a static method overloaded to "==". T_B dosn't. And, I run the following code. I expect both "a" and "b" show the messagebox. But, only "b" showes the messagebox. Even I try to see "a" through visual studio, "a" is
10
2206
by: Wilhelm Heramb | last post by:
What is the best practice to implement operator overloading for == and != that handles null on either lhs or rhs. Andreas :-)
5
3162
by: Amogh | last post by:
Hi, My question is related to setting freed pointers to NULL. After freeing a pointer: 1) Should the freeing routine also be responsible for setting the pointer to null? 2) Or, should the client/user code be responsible for doing it? On what basis should a decision be made favouring either case ?
1
1722
by: connor7777 | last post by:
Hi guys: We've been weeding out errors off of a java->c# project and have managed to redeem most of our code with the exception of one bug that we for some reason cannot pin down. The following is an implementation of Linked List class for any item "E" (that also implements IMatchable for itself). It defines "LinkedList" as a recursive datatype with no separate "Cell" or "Node" class, much the same as say for instance ML's Programming...
8
2291
by: A. Anderson | last post by:
Howdy everyone, I'm experiencing a problem with a program that I'm developing. Take a look at this stack report from GDB - #0 0xb7d782a3 in strlen () from /lib/tls/i686/cmov/libc.so.6 #1 0xb7d4c2f7 in vfprintf () from /lib/tls/i686/cmov/libc.so.6 #2 0xb7d6441b in vsprintf () from /lib/tls/i686/cmov/libc.so.6 #3 0x08049ba0 in character_data::printf (this=0x800, argument=0x0) at character.c:198
9
3797
by: Francois Grieu | last post by:
When running the following code under MinGW, I get realloc(p,0) returned NULL Is that a non-conformance? TIA, Francois Grieu #include <stdio.h> #include <stdlib.h>
3
8643
by: suganya | last post by:
Hi Some professionals already has developed the project using menu. In my company, they have given me task to clear the error in that. It is a script file named as "menubarAPI4.js" which is kept inside the folder "menu_script". The following is the code in this file. var menuOffsetTop=menuOffsetLeft=submenuOffsetTop=submenuOffsetLeft=submenuOffsetRight=0; var Doc=this.document;var standards=Doc.createElement&&Doc.createTextNode?1:0;...
0
8483
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
8927
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
8825
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
8605
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
7445
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
5703
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
4227
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
1
2819
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
2062
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.