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Archive for March, 2011

Fix Malformed JSON in C#

March 31, 2011 3 comments

When converting JSON to XML in C# using JsonReaderWriterFactory.CreateJsonReader, then you will find that it’s quite alot stricter at interpreting JSON than Javascript.

For Example { a:”b” } is valid JSON for javascript, but with JsonReaderWriterFactory.CreateJsonReader, it will return an error such as The token ‘”‘ was expected but found ‘a’.

This is some handy code that fixes malformed JSON for use with JsonReaderWriterFactory.CreateJsonReader, If Json is Malformed, i.e. no inverted commas around field names, then this function adds them back in

public static string NormalizeJson(string json)
{
    const string strFindRegex = @"(?[,{]\s*)(?\w+):";
    const string strReplaceRegex = @"${prefix}""${field}"":";
    var strWellFormedJson = Regex.Replace(json, strFindRegex, strReplaceRegex);
    // functions are valid in javascript, but not valid for a JsonReader
    const string strNoFunctionRegex = @"function..\s+{.*}";
    strWellFormedJson = Regex.Replace(strWellFormedJson, strNoFunctionRegex, "false");
    // Json should end with a close-curly-bracket
    if (!strWellFormedJson.EndsWith("}"))
    {
	var intLastCurlyBracket = strWellFormedJson.LastIndexOf("}");
	strWellFormedJson = strWellFormedJson.Substring(0, intLastCurlyBracket + 1);
    }
    return strWellFormedJson;
}
Categories: Uncategorized

Create ORM using Reflection C#

March 27, 2011 3 comments

Here is a simple bit of code that can create an ORM (Object Relational Mapping) using reflection on the types being inserted or updated. It’s still a work in progress, since it assumes a flat object structure, each field being stored as a varchar(1000) and field names in the database must exactly match that in the object. I’ve based this on MySQL, but by simply changing “Limit 1” to “top 1”, that should be MSSQL sorted too.

using System;
using System.Reflection;
using MySql.Data.MySqlClient;

/// <summary>
/// Creates an object / relational mapping using reflection
/// </summary>
public class ReflectiveORM
{
private static string sqlConnection = “Server=…;Database=…;Uid=…;Pwd=…;”;

public static void InsertOrUpdateObjectInDB<T>(T o, string table, string uniqueField)
{
if (CheckIfAlreadyExists(o, table, uniqueField))
{
updateObjectInDB(o, table, uniqueField);
}
else
{
insertObjectIntoDB(o, table);
}
}

public static bool CheckIfAlreadyExists<T>(T o, string table, string uniqueField)
{
PropertyInfo piUnique = typeof(T).GetProperty(uniqueField);
string strSQL = “select ” + uniqueField + ” from ” + table + ” where “;
strSQL += uniqueField + “='” + piUnique.GetValue(o, null).ToString().Replace(“‘”, “””) + “‘”;
strSQL += ” limit 1″;
string strReadBack = getSingleValue(strSQL, uniqueField);
if (string.IsNullOrEmpty(strReadBack))
{
// No record in db, do insert.
return false;
}
// record in db, do update
return true;
}

public static void updateObjectInDB<T>(T o, string table, string uniqueField)
{
PropertyInfo[] fields = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
string strSql = “update ” + table + ” set “;
string strSeperator = “”;
foreach (PropertyInfo field in fields)
{
string strValue = field.GetValue(o, null).ToString();
strSql += strSeperator + field.Name;
strSql += ” = ‘” + strValue.Replace(“‘”, “””) + “‘”;
strSeperator = “,”;
}
PropertyInfo piUnique = typeof(T).GetProperty(uniqueField);
string strUnique = piUnique.GetValue(o, null).ToString();
strUnique = strUnique.Replace(“‘”, “””);
strSql += ” where ” + uniqueField + “='” + strUnique + “‘”;
ExecuteNonQuery(strSql);
}

public static void insertObjectIntoDB<T>(T o, string table)
{
PropertyInfo[] fields = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
string strSql = “insert into ” + table + ” (“;
string strSeperator = “”;
foreach (PropertyInfo field in fields)
{
strSql += strSeperator + field.Name;
strSeperator = “,”;
}
strSql += “) values (“;
strSeperator = “”;
foreach (PropertyInfo field in fields)
{
string strValue = field.GetValue(o, null).ToString();
strSql += strSeperator + “‘” + strValue.Replace(“‘”, “””) + “‘”;
strSeperator = “,”;
}
strSql += “);”;
ExecuteNonQuery(strSql);
}

/// <summary>
/// Executes a query that returns no data
/// </summary>
/// <param name=”sql”>The sql statement to execute</param>
public static void ExecuteNonQuery(string sql)
{
using (var conn = new MySqlConnection(sqlConnection))
{
var cmd = new MySqlCommand(sql, conn);
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
}
return;
}

public static string getSingleValue(string sql, string field)
{
string returnVal = null;
MySqlConnection DSN = new MySqlConnection(sqlConnection);
DSN.Open();
MySqlCommand Database = new MySqlCommand(sql, DSN);
MySqlDataReader dr = Database.ExecuteReader();
if (dr.Read())
{
returnVal = dr[field].ToString();
}
DSN.Close();
return returnVal;
}

}

To use it, set the connection string in this class, then call

ReflectiveORM.InsertOrUpdateObjectInDB(product, “product”, “Code”);

The table “product” must be set up in advance..

 

Categories: Uncategorized

Blackberry on Phonegap

March 22, 2011 Leave a comment

This morning, I decided to take a look at the Blackberry support for phonegap. So far, their sample app works a charm.

Here is the steps to create and build this sample app:

ant create -Dpro
h=E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sample
Buildfile: E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\build

clean:

build-javascript:
[mkdir] Created dir: E:\research\phonegap\phonegap-0.9.4\BlackBerry\
\build\javascript
[delete] Deleting: E:\research\phonegap\phonegap-0.9.4\BlackBerry\Web
ild\javascript\phonegap.0.9.4.min.js.tmp

build-extension:
[mkdir] Created dir: E:\research\phonegap\phonegap-0.9.4\BlackBerry\
\build\ext
[zip] Building zip: E:\research\phonegap\phonegap-0.9.4\BlackBerry
s\build\ext\phonegap.0.9.4.jar

create:
[mkdir] Created dir: E:\research\phonegap\phonegap-0.9.4\BlackBerry\
\Sample
[copy] Copying 10 files to E:\research\phonegap\phonegap-0.9.4\Blac
ebWorks\Sample
[copy] Copying 2 files to E:\research\phonegap\phonegap-0.9.4\Black
bWorks\Sample\www\javascript
[copy] Copying 1 file to E:\research\phonegap\phonegap-0.9.4\BlackB
Works\Sample\www\ext
[mkdir] Created dir: E:\research\phonegap\phonegap-0.9.4\BlackBerry\
\Sample\lib\phonegap.0.9.4
[copy] Copying 3 files to E:\research\phonegap\phonegap-0.9.4\Black
bWorks\Sample\lib\phonegap.0.9.4
[echo]
[echo] Project Creation Complete!
[echo] ==========================
[echo]
[echo] Getting Started:
[echo] —————-
[echo]
[echo]   cd E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks
[echo]
[echo]   ant help
[echo]

BUILD SUCCESSFUL
Total time: 9 seconds

E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks>cd sample

E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sample>dir
Volume in drive E is Data
Volume Serial Number is 9E79-47CC

Directory of E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sa

22/03/2011  10:33    <DIR>          .
22/03/2011  10:33    <DIR>          ..
22/03/2011  10:33             9,193 build.xml
22/03/2011  10:33    <DIR>          lib
22/03/2011  10:33             1,966 project.properties
22/03/2011  10:33    <DIR>          www
2 File(s)         11,159 bytes
4 Dir(s)  99,064,516,608 bytes free

E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sample>notepad p
roperties

E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sample>ant build
Buildfile: E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sampl
xml

generate-cod-name:
[echo] Generated name: PhoneGapSample.cod

clean:

package-app:
[mkdir] Created dir: E:\research\phonegap\phonegap-0.9.4\BlackBerry\
\Sample\build\widget
[copy] Copying 9 files to E:\research\phonegap\phonegap-0.9.4\Black
bWorks\Sample\build\widget
[zip] Building zip: E:\research\phonegap\phonegap-0.9.4\BlackBerry
s\Sample\build\PhoneGapSample.zip

build:
[exec] [INFO]                      Parsing command line options
[exec] [INFO]                      Parsing bbwp.properties
[exec] [INFO]                      Validating application archive
[exec] [INFO]                      Parsing config.xml
[exec] [WARNING]                   Failed to find the <author> elem
[exec] [INFO]                      Populating application source
[exec] [INFO]                      Compiling BlackBerry WebWorks ap
n
[exec] [INFO]                      Generating output files
[exec] [INFO]                      BlackBerry WebWorks application
g complete

BUILD SUCCESSFUL
Total time: 32 seconds

E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sample>ant load-
r
Buildfile: E:\research\phonegap\phonegap-0.9.4\BlackBerry\WebWorks\Sampl
xml

generate-cod-name:
[echo] Generated name: PhoneGapSample.cod

clean:
[delete] Deleting directory E:\research\phonegap\phonegap-0.9.4\Black
bWorks\Sample\build

package-app:
[mkdir] Created dir: E:\research\phonegap\phonegap-0.9.4\BlackBerry\
\Sample\build\widget
[copy] Copying 9 files to E:\research\phonegap\phonegap-0.9.4\Black
bWorks\Sample\build\widget
[zip] Building zip: E:\research\phonegap\phonegap-0.9.4\BlackBerry
s\Sample\build\PhoneGapSample.zip

build:
[exec] [INFO]                      Parsing command line options
[exec] [INFO]                      Parsing bbwp.properties
[exec] [INFO]                      Validating application archive
[exec] [INFO]                      Parsing config.xml
[exec] [WARNING]                   Failed to find the <author> elem
[exec] [INFO]                      Populating application source
[exec] [INFO]                      Compiling BlackBerry WebWorks ap
n
[exec] [INFO]                      Generating output files
[exec] [INFO]                      BlackBerry WebWorks application
g complete

load-simulator:
[echo] Simulator directory=C:\BBWP\simpack\5.0.0.469
[echo] Simulator executable=C:\BBWP\simpack\5.0.0.469/9550.bat
[echo] MDS directory=C:\BBWP/mds
[copy] Copying 4 files to C:\BBWP\simpack\5.0.0.469

BUILD SUCCESSFUL
Total time: 19 seconds

SCM 4.1.5.32 32 2008/04/23
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<2011-03-22 10:36:54.270 GMT>:[3]:<MDS-CS_MDS>:<DEBUG>:<LAYER = SCM, EVENT = Connected, TOPSERVICE = SRPH, LOWERSERVICE = GME>
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<2011-03-22 10:36:54.871 GMT>:[24]:<MDS-CS_MDS>:<DEBUG>:<LAYER = SRPH, LAYER = SRPH, EVENT = Initialization>
<2011-03-22 10:36:54.873 GMT>:[27]:<MDS-CS_MDS>:<DEBUG>:<LAYER = IPPP, EVENT = Started, THREAD = ListenForClientsPackets>
<2011-03-22 10:36:54.873 GMT>:[26]:<MDS-CS_MDS>:<DEBUG>:<LAYER = IPPP, EVENT = Started, THREAD = ConnectionsInputStreamesReader3>
<2011-03-22 10:36:54.875 GMT>:[29]:<MDS-CS_MDS>:<DEBUG>:<LAYER = IPPP, EVENT = Started, THREAD = ConnectionsInputStreamesReader4>
<2011-03-22 10:36:54.872 GMT>:[25]:<MDS-CS_MDS>:<DEBUG>:<LAYER = IPPP, EVENT = Started, THREAD = ConnectionsInputStreamesReader1>
<2011-03-22 10:36:54.877 GMT>:[31]:<MDS-CS_MDS>:<DEBUG>:<LAYER = IPPP, EVENT = Started, THREAD = IPLayerHttpClientIdleConnectionTimeoutThread>
<2011-03-22 10:36:54.876 GMT>:[30]:<MDS-CS_MDS>:<DEBUG>:<LAYER = IPPP, EVENT = Started, THREAD = ListenOnDatagramStatus>
<2011-03-22 10:36:54.874 GMT>:[28]:<MDS-CS_MDS>:<DEBUG>:<LAYER = IPPP, EVENT = Started, THREAD = QueuesManager>
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22-Mar-2011 10:36:55 org.apache.catalina.startup.Embedded start
INFO: Starting tomcat server
22-Mar-2011 10:36:56 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.5.23
22-Mar-2011 10:36:56 org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
22-Mar-2011 10:36:57 org.apache.catalina.startup.ContextConfig defaultWebConfig
INFO: No default web.xml
22-Mar-2011 10:36:57 org.apache.catalina.core.ApplicationContext logINFO: AdministrationController (Status):init
22-Mar-2011 10:36:57 org.apache.catalina.core.ApplicationContext logINFO: C:\BBWP\mds
22-Mar-2011 10:36:57 org.apache.catalina.core.ApplicationContext logINFO: AdministrationController (Statistics):init
22-Mar-2011 10:36:57 org.apache.catalina.core.ApplicationContext logINFO: C:\BBWP\mds
22-Mar-2011 10:36:57 org.apache.coyote.http11.Http11BaseProtocol initINFO: Initializing Coyote HTTP/1.1 on http-28080
22-Mar-2011 10:36:57 org.apache.coyote.http11.Http11BaseProtocol startINFO: Starting Coyote HTTP/1.1 on http-28080
<2011-03-22 10:36:57.581 GMT>:[42]:<MDS-CS_MDS>:<DEBUG>:<LAYER = SCM, Web Server Started>
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<2011-03-22 10:37:03.236 GMT>:[47]:<MDS-CS_MDS>:<DEBUG>:<LAYER = SCM, EVENT = Admin. Task- pending push messages>

Categories: Uncategorized

WebOS file manager

March 21, 2011 Leave a comment

Part of the PDK that you can download from palm includes a Device browser that allows you to easily send and recieve files via a GUI.

I’ve also heard that you can use WinSCP to do this also, giving more control (checkout port 10022)

Palm kindly left the source code in the JAR, which you can view here

http://zip.webtropy.com/default.aspx/gO8cYb

Categories: Uncategorized

TFS: Under the hood

March 18, 2011 Leave a comment
Categories: Uncategorized

WebOs Hacks: List all installed apps on a Palm pre

March 18, 2011 Leave a comment

One of the fun things you can do with a Palm Pre is access the underlying Linux OS via a terminal program, which I’ve used NovaTerm

By navigating around the file system I could find a list of installed apps, by navigating to /media/cryptofs/apps/user/palm/applications

navigating into these apps gives the source code… you can use the vi editor to view file contents (use : x to exit)

Looking into the source code of NovaTerm, it connects to localhost on port 6968, recreating this on Telnet, It reports

3517 a339f527fe6d98a2b95b9f2ef036d503042181c9 usb castle-linux

Then closes the port.

3517 is another port number, and the long hex number is the NDUID or DeviceID

Categories: Uncategorized

OSDb in C#

March 16, 2011 Leave a comment
Categories: Uncategorized