If you use Response.Redirect to direct users to a new location, you should be aware that it issues a status code of 302, which means that “the resource resides temporarily under a different URI.” If you intend to communicate that the resource has permanently changed locations, you should not use Response.Redirect. This is important for search engines and other crawlers that might need to know the definitive url.
To send a 301 redirect:
Response.Status="301 Moved Permanently";
Response.StatusCode=301;
Response.AddHeader("Location", url);
Response.End();
INSERTINTO wp_usermeta
(
user_id,
meta_key,
meta_value
)(SELECT
id,'admin_color','classic'FROM wp_users
WHERE id NOTIN(SELECT user_Id FROM wp_usermeta WHERE meta_key ='admin_color'))UPDATE wp_usermeta SET meta_value ='classic'WHERE meta_key ='admin_color'
INSERT INTO wp_usermeta
(
user_id,
meta_key,
meta_value
)
(
SELECT
id,
'admin_color',
'classic'
FROM wp_users
WHERE id NOT IN (SELECT user_Id FROM wp_usermeta WHERE meta_key = 'admin_color')
)
UPDATE wp_usermeta SET meta_value = 'classic' WHERE meta_key = 'admin_color'
While trying to migrate a large blog from Movable Type to WordPress, I found the built-in export and import functionality unable to handle volume of content on the blog or to properly preserve the primary keys needed for permalinks.
With assistance from Alvaro on the MisesDev list, we came up with the following MySql SQL script to import the entries directly from the Movable Type (5.01) database to WordPress (2.9.2). What would take many hours otherwise can be done in a minute or two. This is especially important if you don’t want to lose data during the time it takes to migrate the blog, as the script can be run immediately before the switch. This script also includes additional stuff like IP addresses and url-friendly names. Continue reading SQL script to migrate from Movable Type to WordPress→
The Luhn algorithm is a checksum used for credit cards and many other identifying numbers as a basic integrity validation check. It’s useful for credit card forms because it avoids unneeded transaction attempts when card numbers are mis-typed.
It’s easy to add an account # Luhn checksum validation control to credit card forms in ASP.Net:
Add a <asp:CustomValidator … /> control with the error message, target control, etc.
Add and wire up a void ServerValidation method:
void ServerValidation(object source, ServerValidateEventArgs args){// use a RequiredFieldValidator to check for an empty valueif(txtCardNum.Text==string.Empty) args.IsValid=true;
args.IsValid= IsCreditCardValid(this.txtCardNum.Text);}protectedoverridevoid OnInit(EventArgs e){base.OnInit(e);
valLunCode.ServerValidate+= ServerValidation;}
void ServerValidation(object source, ServerValidateEventArgs args) {
// use a RequiredFieldValidator to check for an empty value
if (txtCardNum.Text == string.Empty) args.IsValid = true;
args.IsValid = IsCreditCardValid(this.txtCardNum.Text);
}
protected override void OnInit(EventArgs e) {
base.OnInit(e);
valLunCode.ServerValidate += ServerValidation;
}
(Optional:) For client-side code, use a Javascript version from here.
To open an app in terminal, type open -a AppName or open /Applications/AppName.app if you want to specify the path. I use it for starting VNC server via SSH.
Bonus: echo “set completion-ignore-case On” > ~/.inputrc will make auto-completion case-insensitive.
When processing photos, sometimes you want to re-orient the photo according the orientation recorded by the camera (such as the iPhone’s accelerometer) and stored in the EXIF meta data. It’s easy to do:
// Rotate the image according to EXIF datavar bmp =new Bitmap(pathToImageFile);var exif =new EXIFextractor(ref bmp, "n");// get source from http://www.codeproject.com/KB/graphics/exifextractor.aspx?fid=207371if(exif["Orientation"]!=null){
RotateFlipType flip = OrientationToFlipType(exif["Orientation"].ToString());if(flip != RotateFlipType.RotateNoneFlipNone)// don't flip of orientation is correct{
bmp.RotateFlip(flip);
exif.setTag(0x112, "1");// Optional: reset orientation tag
bmp.Save(pathToImageFile, ImageFormat.Jpeg);}// Match the orientation code to the correct rotation:privatestatic RotateFlipType OrientationToFlipType(string orientation){switch(int.Parse(orientation)){case1:return RotateFlipType.RotateNoneFlipNone;break;case2:return RotateFlipType.RotateNoneFlipX;break;case3:return RotateFlipType.Rotate180FlipNone;break;case4:return RotateFlipType.Rotate180FlipX;break;case5:return RotateFlipType.Rotate90FlipX;break;case6:return RotateFlipType.Rotate90FlipNone;break;case7:return RotateFlipType.Rotate270FlipX;break;case8:return RotateFlipType.Rotate270FlipNone;break;default:return RotateFlipType.RotateNoneFlipNone;}}
// Rotate the image according to EXIF data
var bmp = new Bitmap(pathToImageFile);
var exif = new EXIFextractor(ref bmp, "n"); // get source from http://www.codeproject.com/KB/graphics/exifextractor.aspx?fid=207371
if (exif["Orientation"] != null)
{
RotateFlipType flip = OrientationToFlipType(exif["Orientation"].ToString());
if (flip != RotateFlipType.RotateNoneFlipNone) // don't flip of orientation is correct
{
bmp.RotateFlip(flip);
exif.setTag(0x112, "1"); // Optional: reset orientation tag
bmp.Save(pathToImageFile, ImageFormat.Jpeg);
}
// Match the orientation code to the correct rotation:
private static RotateFlipType OrientationToFlipType(string orientation)
{
switch (int.Parse(orientation))
{
case 1:
return RotateFlipType.RotateNoneFlipNone;
break;
case 2:
return RotateFlipType.RotateNoneFlipX;
break;
case 3:
return RotateFlipType.Rotate180FlipNone;
break;
case 4:
return RotateFlipType.Rotate180FlipX;
break;
case 5:
return RotateFlipType.Rotate90FlipX;
break;
case 6:
return RotateFlipType.Rotate90FlipNone;
break;
case 7:
return RotateFlipType.Rotate270FlipX;
break;
case 8:
return RotateFlipType.Rotate270FlipNone;
break;
default:
return RotateFlipType.RotateNoneFlipNone;
}
}
1: In IIS7 manager, enable dynamic and static compriession. (This adds <urlCompression doStaticCompression=”true” doDynamicCompression=”true” /> to applicationHost.config)
2: Open C:WindowsSystem32InetsrvConfigapplicationHost.config and go to the httpCompression section. For both dynamicTypes and staticTypes: <mimetype=”*/*” enabled=”true”>
3: Run appcmd in %systemroot%system32inetsrv
appcmd set config /section:httpCompression /[name=’gzip’].dynamicsCompressionLevel:10
appcmd set config /section:httpCompression /[name=’gzip’].staticCompressionLevel:10
(Set the value to 7,8,or 9 for less CPU usage)
Note: compressing static files prevents them from displaying incrementally while the rest of the file downloads in the background. This may be useful for viewing partially loaded PDF’s, text files, images, etc. It may be appropriate to enable/disable compression per-directory in some cases.
One thing I don’t like about the default Xcode layout is that all the views – code, debug, console, find, etc open in new windows by default.
If you’d rather not manage a bunch of Xcode windows all the time, Xcode has a “hidden” All-One-One view which shows all your views in a single window and ads a page toggle which conveniently switched between code and debugging toolbars. You can access under Preferences – General – Layout. This took me a long time to figure out because the Layout dropdown is disabled when a project is open. Maybe it’s my Visual Studio background, but I like the integrated view much better.
n. 1: automatic, but with an element of magic. 2: too complex to understand and/or explain
