DZone Snippets: Net code

ProjectX client-side code

jrobertson (James Robertson) — Mon, 18 Feb 2008 18:49:42 GMT

This Ruby code uses a unified XML format to create a password record on a web server. It's intended to be run as a batch file which gets called from another Ruby application called maintain_projectx which gets called from a cronjob.

In this example the password is stored on the server not for authentication but simply to provide a reminder service in the event the user forgets it.



require 'net/http'

require 'rexml/document'

include REXML



class ProjectXClient

  attr :doc

  def initialize(raw_url)

    url = URI.escape(raw_url)

    xml_data = Net::HTTP.get_response(URI.parse(url)).body

    @doc = Document.new(xml_data)

  end

  

end



if __FILE__ == $0



  xml_project = <  

    

      

        

        

      

    

  

PROJECT

  

  pxc = ProjectXClient.new("http://yourdomain.com/p/projectx.cgi?xml_project=" + xml_project)

  doc = pxc.doc

  puts doc

    

end

output -what's returned from the server is an XML response containing a result. The result echos the method executed and the output from that method, which in this instance is the xml record node 'entry'.





  

    

      p6789c

      hotmail

Getting Started With WWW::Mechanize

jrobertson (James Robertson) — Tue, 12 Feb 2008 17:53:54 GMT

This Ruby code uses WWW:mechanize to act like a web browser.



 require 'rubygems'

 require 'mechanize'



 agent = WWW::Mechanize.new

 page = agent.get('http://google.com/')

Refer to the documentation at http://mechanize.rubyforge.org/mechanize/. Then gem install mechanize, and try running the code in an irb session.

output (extract):



=> # {url #}

 {meta}

 {title "Google"}

 {iframes}

 {frames}

 {links

  #   "Images"

   "http://images.google.com/imghp?hl=en&tab=wi">

  #   "Maps"

   "http://maps.google.com/maps?hl=en&tab=wl">

  #   "News"

   "http://news.google.com/nwshp?hl=en&tab=wn">

  #   "Shopping"

   "http://www.google.com/prdhp?hl=en&tab=wf">

  #   "Gmail"

   "http://mail.google.com/mail/?hl=en&tab=wm">

Syntax-at-a-Glance for the C# programming language

dubby (Dave) — Wed, 12 Sep 2007 05:53:00 GMT



// CLASS1.CS -- Syntax-at-a-Glance for the C# programming language.

// A quick code reference for programmers who work in many languages.

// Executable code, minimal comments document the essence of the language.





using System;

using System.Collections;

using System.IO;



namespace StructureByDesign.Syntax

{

public class Class1: Object

{

    public static int Main(string[] args)       // Entry point.

    {

        System.Console.WriteLine("Hello");

        Class2 aclass2 = new Class2();

        aclass2.run();

        return 0;

    }

}



interface Interface1

{

    void run();

}



class Class2: Class1, Interface1

{

    public const int CONSTANT = 1;          // Access not restricted, implicitly static.

    private int m_intPrivateField;          // Access limited to containing type.

    public Class2() : base()                // Constructor.

    {

        initialize();

    }

    protected void initialize()             // Object initialization.

    {                                       // Access limited to containing class or types derived.

        Number = 1;

    }

    protected int Number                    // Language property feature.

    {

        get

        {

            return m_intPrivateField;

        }

        set

        {

            m_intPrivateField = value;      // Implicit parameter.

        }

    }

    public void run()

    {

        anonymousCode();

        arrays();

        collections();

        comparison();

        control();

        filesStreamsAndExceptions();

        numbersAndMath();

        primitivesAndConstants();

        runtimeTyping();

        strings();

    }

    void anonymousCode()

    {

        Delegate adelegate = new Delegate(Run);

        adelegate();

    }

    delegate void Delegate();

    void Run()

    {

        Console.WriteLine("Run");

    }

    void arrays()

    {

        int[] arrayOfInts = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

        arrayOfInts[0] = 9;

        assert(arrayOfInts[0] == arrayOfInts[9]);



        String[] arrayOfStrings = new String[10];

        assert(arrayOfStrings[0] == null);

        assert(arrayOfStrings.Length == 10);



        arrayOfStrings = new String[] { "one", "two" };



        byte[,] arrayOfBytes = { {0,0,0},

                                 {0,1,2},

                                 {0,2,4}};

        assert(arrayOfBytes[2,2] == 4);

    }

    void collections()

    {

        IList ailist = new ArrayList();

        ailist.Add("zero"); ailist.Add("one"); ailist.Add("three");

        ailist[2] = "two";

        assert(ailist[2].Equals("two"));

        ailist.Remove("two");

        ((ArrayList)ailist).Sort();

        for(IEnumerator aie = ((ArrayList)ailist).GetEnumerator(); aie.MoveNext(); )

            ;

        foreach(String astring in ailist)

            ;



        IDictionary aidictionary = new Hashtable();

        aidictionary.Add("key", "value");

        assert(aidictionary["key"].Equals("value"));



        // Set not available.

    }

    void comparison()

    {

        int aint1 = 1;

        int aint2 = 2;

        int aint = 1;

        String astring1 = "one";

        String astring2 = "two";

        String astring = astring1;



        assert(aint == aint1);

        assert(aint1 != aint2);

        assert(astring == astring1);

        assert(astring1 == String.Copy("one"));         // For strings == is overloaded to compare values.

        assert(!astring1.Equals(astring2));

        assert(astring1.Equals(String.Copy("one")));



        astring = null;

        if (astring != null && astring.Length > 0)      // Conditional evaluation.

            assert(false);



        if (aint2 < 0 || 1 < aint2)

            assert(true);

    }

    void control()

    {

        if (true)

            assert(true);

        else

            assert(false);

        /////

        switch ('b') {

            case 'a':

                assert(false);

                break;

            case 'b':

                assert(true);

                break;

            default:

                assert(false);

                break;

        }

        /////

        for (int ai1 = 0; ai1 < 10; ai1++)

            assert(true);

        /////

        int ai = 0;

        while (ai < 10) {

            assert(true);

            ai++;

        }



        do

            ai--;

        while (ai > 0);



        for (int x = 0; x < 10; x++)        // Labeled break/continue not available.

            for (int y = 0; y < 10; y++)

                if (x == 9)

                    break;

                else

                    continue;

    }

    void filesStreamsAndExceptions()

    {

        FileInfo afileinfo = new FileInfo("list.txt");

        try {

            StreamWriter asw = new StreamWriter("list.txt");

            asw.WriteLine("line");

            asw.WriteLine("line");

            asw.Close();



            assert(afileinfo.Exists);



            StreamReader asr = new StreamReader("list.txt");

            String astringLine;

            while ((astringLine = asr.ReadLine()) != null)

                assert(astringLine.Equals("line"));

            asr.Close();

        } catch (IOException aexception) {

            System.Console.WriteLine(aexception.Message);

            throw new NotSupportedException();

        }

        finally {

            afileinfo.Delete();

        }

    }

    void numbersAndMath()

    {

        assert(Int32.Parse("123") == 123);

        assert(123.ToString().Equals("123"));



        assert(Math.PI.ToString("n3").Equals("3.142"));



        assert(Int32.MaxValue < Int64.MaxValue);



        assert(Math.Abs(Math.Sin(0) - 0) <= Double.Epsilon);

        assert(Math.Abs(Math.Cos(0) - 1) <= Double.Epsilon);

        assert(Math.Abs(Math.Tan(0) - 0) <= Double.Epsilon);



        assert(Math.Abs(Math.Sqrt(4) - 2) <= Double.Epsilon);

        assert(Math.Abs(Math.Pow(3,3) - 27) <= Double.Epsilon);



        assert(Math.Max(0,1) == 1);

        assert(Math.Min(0,1) == 0);



        assert(Math.Abs(Math.Ceiling(9.87) - 10.0) <= Double.Epsilon);

        assert(Math.Abs(Math.Floor(9.87) - 9.0) <= Double.Epsilon);

        assert(Math.Round(9.87) == 10);



        Random arandom = new Random();

        double adouble = arandom.NextDouble();

        assert(0.0 <= adouble && adouble < 1.0);

        int aint = arandom.Next(10);

        assert(0 <= aint && aint < 10);

    }

    enum Season: byte { Spring=0, Summer, Fall, Winter };



    void primitivesAndConstants()

    {

        bool abool = false;

        char achar = 'A';           // 16 bits, Unicode



        byte abyte = 0x0;           // 8 bits, unsigned, hex constant

        sbyte asbyte = 0;           // 8 bits, signed



        short ashort = 0;           // 16 bits, signed

        ushort aushort = 0;         // 16 bits, unsigned



        int aint = 0;               // 32 bits, signed

        uint aunit = 0;             // 32 bits, unsigned



        long along = 0L;            // 64 bits, signed

        ulong aulong = 0;           // 64 bits, unsigned



        float afloat = 0.0F;        // 32 bits

        double adouble = 0.0;       // 64 bits



        decimal adecimal = 0;       // 128 bits, financial calculations



        Season aseason = Season.Fall;

        assert((byte)aseason == 2);

    }

    void runtimeTyping()

    {

        assert(new int[] { 1 } is int[]);

        assert(new ArrayList() is ArrayList);



        assert((new ArrayList()).GetType() == typeof(ArrayList));

        assert(typeof(Int32) is Type);      // Type of primitive type.



        assert(Type.GetType("System.Collections.ArrayList") == typeof(ArrayList));

    }

    void strings()

    {

        String astring1 = "one";

        String astring2 = "TWO";



        assert((astring1 + "/" + astring2).Equals("one/TWO"));

        assert(astring2.ToLower().Equals("two"));   // Equals ignoring case not available.

        assert(astring1.Length == 3);

        assert(astring1.Substring(0,2).Equals("on"));

        assert(astring1[2] == 'e');

        assert(astring1.ToUpper().Equals("ONE"));

        assert(astring2.ToLower().Equals("two"));

        assert(astring1.CompareTo("p") < 0);

        assert(astring1.IndexOf('e') == 2);

        assert(astring1.IndexOf("ne") == 1);

        assert(astring1.Trim().Length == astring1.Length);



        assert(Char.IsDigit('1'));

        assert(Char.IsLetter('a'));

        assert(Char.IsWhiteSpace('\t'));

        assert(Char.ToLower('A') == 'a');

        assert(Char.ToUpper('a') == 'A');

    }

    private void assert(bool abool)

    {

        if (!abool)

            throw new Exception("assert failed");

    }

}

}

Reading an xml file from a URL and saving it locally

jrobertson (James Robertson) — Sat, 08 Sep 2007 14:20:04 GMT

// description of your code here
This code reads an xml file, modifys an element and saves the file locally.



require 'net/http'

require 'rexml/document'



url = 'http://www.example.com/journal080907.xml'



element_name = ARGV[0] # basic_category

xpath = ARGV[1] # eg.'entries/entry'

file = ARGV[2] # eg. 'journal080907.xml'

element_value = ARGV[3] # 'ruby'



file = File.new(file,'w')

# get the XML data as a string

xml_data = Net::HTTP.get_response(URI.parse(url)).body



# extract event information

doc = REXML::Document.new(xml_data)

docx = doc



node = docx.elements[xpath]

element = node.elements[element_name]

puts element.text

element.text = 'ruby'

file.puts docx

Acceder a la fecha en la que una foto fue tomada en VB .NET

ceronegativo (Pablo) — Mon, 30 Oct 2006 22:16:11 GMT

//Función a la que se le pasa el archivo jpg o jpge y devuelve la fecha en la que fue tomada



    Public Function ObtieneFecha(ByVal RutaArchivo As String) As Date



        Dim image As New Bitmap(RutaArchivo)

        Dim propItems As System.Drawing.Imaging.PropertyItem() = image.PropertyItems



        Dim encoding As New System.Text.ASCIIEncoding



        For i As Integer = propItems.GetLowerBound(0) To propItems.GetUpperBound(0)

            If propItems(i).Id.ToString = "36868" Then

                Dim strAux1() As String = Split(encoding.GetString(propItems(i).Value), " ")

                Dim strAux2() As String = Split(strAux1(0), ":")

                Dim strAux3() As String = Split(strAux1(1), ":")

                Return CDate(strAux2(0) & "/" & strAux2(1) & "/" & strAux2(2) & " " & strAux3(0) & ":" & strAux3(1) & ":" & strAux3(2))

            End If

        Next

        image.Dispose()

    End Function

Python - getFile Internet

whitetiger () — Sat, 30 Sep 2006 22:35:20 GMT

// Scaricare un file dalla rete



package get.file.example;



import java.io.BufferedInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URL;



public class GetFileExample

{

	public GetFileExample()

	{

		try

		{

			byte[] bite = new byte[2048];

			int read;

			URL url = new URL("http://switch.dl.sourceforge.net/sourceforge/pys60miniapps/FlickrS60_src_v0.1b.tar.bz2");

			

			BufferedInputStream bis = new BufferedInputStream(url.openStream());

			FileOutputStream fos = new FileOutputStream("/tmp/file.tar.bz2");

			

			while((read = bis.read(bite))>0)

			{

				fos.write(bite, 0, read);

				System.out.println("--");

			}

			

			fos.close();

			bis.close();

			

			System.out.println("FINE");

			

		}

		catch(MalformedURLException e)

		{

			e.printStackTrace();

		}

		catch(IOException e)

		{

			e.printStackTrace();

		}

	}

	

	public static void main(String[] args)

	{

		new GetFileExample();

	}

}

Use the del.icio.us API via HTTPS from Ruby

jswizard (JavaScript Wizard) — Wed, 16 Aug 2006 21:37:15 GMT

Found at http://www.juretta.com/log/2006/08/13/ruby_net_http_and_open-uri/



require 'net/https'

require "rexml/document"



username = "" # your del.icio.us username

password = "" # your del.icio.us password



resp = href = "";

begin      

  http = Net::HTTP.new("api.del.icio.us", 443)

  http.use_ssl = true

  http.start do |http|

    req = Net::HTTP::Get.new("/v1/tags/get", {"User-Agent" => 

        "juretta.com RubyLicious 0.2"})

    req.basic_auth(username, password)

    response = http.request(req)

    resp = response.body

  end     

  #  XML Document

  doc = REXML::Document.new(resp)    

  # iterate over each element 

  doc.root.elements.each do |elem|

    print elem.attributes['tag']  + " -> " + elem.attributes['count'] + "\n"

  end

  

rescue SocketError

  raise "Host " + host + " nicht erreichbar"

rescue REXML::ParseException => e

  print "error parsing XML " + e.to_s

end

Removing accents in NET 2.0 with C#

brau () — Wed, 26 Apr 2006 16:10:20 GMT

Removing accents in NET 2.0



static string UrlSanitize(string url)

{

	url = Regex.Replace(url, @"\s+", "-");

	string stFormD = url.Normalize(NormalizationForm.FormD);

	StringBuilder sb = new StringBuilder();

 

	for (int ich = 0; ich < stFormD.Length; ich++)

	{

		UnicodeCategory uc = CharUnicodeInfo.GetUnicodeCategory(stFormD[ich]);

		if (uc != UnicodeCategory.NonSpacingMark)

		{

			sb.Append(stFormD[ich]);

		}

	}

 

	return (sb.ToString());

}

conectarte a una base de datos con .net

ivan_cursos (Ivan) — Thu, 06 Apr 2006 21:44:35 GMT

// description of your code here



SqlConnection conn = null;

SqlCommand cmd = null;

SqlDataReader dr = null;



String s = null;

Product prod = null;



try

{

	conn = new SqlConnection("Provider=SQLOLEDB;SERVER=sissql2;UID=sa;PWD=AlfaRoma440;DATABASE=genericatest2");



	s = " ";





	cmd = new SqlCommand(s,conn);

	dr = cmd.ExecuteReader();

	// lleno el objeto producto



	while( dr.Read())

	{



	}





}

catch (Exception ex)

{

	// poner el manejo de errores	

}

finally

{

	dr.Close();

	conn.Close();

}

dr.Close();

conn.Close();

return prod;

}

URI Parse

joe_black (joe black) — Sat, 24 Dec 2005 00:28:06 GMT

// description of your code here



require 'net/http'

res = Net::HTTP.get_response(URI.parse('http://www.example.com'))

print res.body