Archive for March, 2010

PHP Array of MIME Types

Useful for when you need to set HTTP headers when serving file downloads. The mime_content_type function is deprecated and in my case was just returning an empty string. The recommended alternative, using PECL finfo_file, should work fine, but adding and compiling in a PECL extension just for this seems like overkill, especially as you have more control using an array. I’m also never crazy about adding dependencies unless they’re absolutely necessary.

This is from snipplr, but includes the image/png type which was, curiously, missing.

$mime_types = array(
"323" => "text/h323",
"acx" => "application/internet-property-stream",
"ai" => "application/postscript",
"aif" => "audio/x-aiff",
"aifc" => "audio/x-aiff",
"aiff" => "audio/x-aiff",
"asf" => "video/x-ms-asf",
"asr" => "video/x-ms-asf",
"asx" => "video/x-ms-asf",
"au" => "audio/basic",
"avi" => "video/x-msvideo",
"axs" => "application/olescript",
"bas" => "text/plain",
"bcpio" => "application/x-bcpio",
"bin" => "application/octet-stream",
"bmp" => "image/bmp",
"c" => "text/plain",
"cat" => "application/",
"cdf" => "application/x-cdf",
"cer" => "application/x-x509-ca-cert",
"class" => "application/octet-stream",
"clp" => "application/x-msclip",
"cmx" => "image/x-cmx",
"cod" => "image/cis-cod",
"cpio" => "application/x-cpio",
"crd" => "application/x-mscardfile",
"crl" => "application/pkix-crl",
"crt" => "application/x-x509-ca-cert",
"csh" => "application/x-csh",
"css" => "text/css",
"dcr" => "application/x-director",
"der" => "application/x-x509-ca-cert",
"dir" => "application/x-director",
"dll" => "application/x-msdownload",
"dms" => "application/octet-stream",
"doc" => "application/msword",
"dot" => "application/msword",
"dvi" => "application/x-dvi",
"dxr" => "application/x-director",
"eps" => "application/postscript",
"etx" => "text/x-setext",
"evy" => "application/envoy",
"exe" => "application/octet-stream",
"fif" => "application/fractals",
"flr" => "x-world/x-vrml",
"gif" => "image/gif",
"gtar" => "application/x-gtar",
"gz" => "application/x-gzip",
"h" => "text/plain",
"hdf" => "application/x-hdf",
"hlp" => "application/winhlp",
"hqx" => "application/mac-binhex40",
"hta" => "application/hta",
"htc" => "text/x-component",
"htm" => "text/html",
"html" => "text/html",
"htt" => "text/webviewhtml",
"ico" => "image/x-icon",
"ief" => "image/ief",
"iii" => "application/x-iphone",
"ins" => "application/x-internet-signup",
"isp" => "application/x-internet-signup",
"jfif" => "image/pipeg",
"jpe" => "image/jpeg",
"jpeg" => "image/jpeg",
"jpg" => "image/jpeg",
"js" => "application/x-javascript",
"latex" => "application/x-latex",
"lha" => "application/octet-stream",
"lsf" => "video/x-la-asf",
"lsx" => "video/x-la-asf",
"lzh" => "application/octet-stream",
"m13" => "application/x-msmediaview",
"m14" => "application/x-msmediaview",
"m3u" => "audio/x-mpegurl",
"man" => "application/x-troff-man",
"mdb" => "application/x-msaccess",
"me" => "application/x-troff-me",
"mht" => "message/rfc822",
"mhtml" => "message/rfc822",
"mid" => "audio/mid",
"mny" => "application/x-msmoney",
"mov" => "video/quicktime",
"movie" => "video/x-sgi-movie",
"mp2" => "video/mpeg",
"mp3" => "audio/mpeg",
"mpa" => "video/mpeg",
"mpe" => "video/mpeg",
"mpeg" => "video/mpeg",
"mpg" => "video/mpeg",
"mpp" => "application/",
"mpv2" => "video/mpeg",
"ms" => "application/x-troff-ms",
"mvb" => "application/x-msmediaview",
"nws" => "message/rfc822",
"oda" => "application/oda",
"p10" => "application/pkcs10",
"p12" => "application/x-pkcs12",
"p7b" => "application/x-pkcs7-certificates",
"p7c" => "application/x-pkcs7-mime",
"p7m" => "application/x-pkcs7-mime",
"p7r" => "application/x-pkcs7-certreqresp",
"p7s" => "application/x-pkcs7-signature",
"pbm" => "image/x-portable-bitmap",
"pdf" => "application/pdf",
"pfx" => "application/x-pkcs12",
"pgm" => "image/x-portable-graymap",
"pko" => "application/",
"pma" => "application/x-perfmon",
"pmc" => "application/x-perfmon",
"pml" => "application/x-perfmon",
"pmr" => "application/x-perfmon",
"pmw" => "application/x-perfmon",
"png" => "image/png",
"pnm" => "image/x-portable-anymap",
"pot" => "application/",
"ppm" => "image/x-portable-pixmap",
"pps" => "application/",
"ppt" => "application/",
"prf" => "application/pics-rules",
"ps" => "application/postscript",
"pub" => "application/x-mspublisher",
"qt" => "video/quicktime",
"ra" => "audio/x-pn-realaudio",
"ram" => "audio/x-pn-realaudio",
"ras" => "image/x-cmu-raster",
"rgb" => "image/x-rgb",
"rmi" => "audio/mid",
"roff" => "application/x-troff",
"rtf" => "application/rtf",
"rtx" => "text/richtext",
"scd" => "application/x-msschedule",
"sct" => "text/scriptlet",
"setpay" => "application/set-payment-initiation",
"setreg" => "application/set-registration-initiation",
"sh" => "application/x-sh",
"shar" => "application/x-shar",
"sit" => "application/x-stuffit",
"snd" => "audio/basic",
"spc" => "application/x-pkcs7-certificates",
"spl" => "application/futuresplash",
"src" => "application/x-wais-source",
"sst" => "application/",
"stl" => "application/",
"stm" => "text/html",
"svg" => "image/svg+xml",
"sv4cpio" => "application/x-sv4cpio",
"sv4crc" => "application/x-sv4crc",
"t" => "application/x-troff",
"tar" => "application/x-tar",
"tcl" => "application/x-tcl",
"tex" => "application/x-tex",
"texi" => "application/x-texinfo",
"texinfo" => "application/x-texinfo",
"tgz" => "application/x-compressed",
"tif" => "image/tiff",
"tiff" => "image/tiff",
"tr" => "application/x-troff",
"trm" => "application/x-msterminal",
"tsv" => "text/tab-separated-values",
"txt" => "text/plain",
"uls" => "text/iuls",
"ustar" => "application/x-ustar",
"vcf" => "text/x-vcard",
"vrml" => "x-world/x-vrml",
"wav" => "audio/x-wav",
"wcm" => "application/",
"wdb" => "application/",
"wks" => "application/",
"wmf" => "application/x-msmetafile",
"wps" => "application/",
"wri" => "application/x-mswrite",
"wrl" => "x-world/x-vrml",
"wrz" => "x-world/x-vrml",
"xaf" => "x-world/x-vrml",
"xbm" => "image/x-xbitmap",
"xla" => "application/",
"xlc" => "application/",
"xlm" => "application/",
"xls" => "application/",
"xlt" => "application/",
"xlw" => "application/",
"xof" => "x-world/x-vrml",
"xpm" => "image/x-xpixmap",
"xwd" => "image/x-xwindowdump",
"z" => "application/x-compress",
"zip" => "application/zip" );

Executing a script

Possibly the best explanation ever on how to execute a *nix script:

To run a non-executable sh script, use:

sh myscript

To run a non-executable bash script, use:

bash myscript

To start an executable (which is any file with executable permission); you just specify it by its path:

/foo/bar /bin/bar ./bar

To make a script executable, give it the necessary permission:

chmod +x bar ./bar

When a file is executable, the kernel is responsible for figuring out how to execte it. For non-binaries, this is done by looking at the first line of the file. It should contain a hashbang:

#! /usr/bin/env bash

The hashbang tells the kernel what program to run (in this case the command /usr/bin/env is ran with the argument bash). Then, the script is passed to the program (as second argument) along with all the arguments you gave the script as subsequent arguments.

That means every script that is executable should have a hashbang. If it doesn’t, you’re not telling the kernel what it is, and therefore the kernel doesn’t know what program to use to interprete it. It could be bash, perl, python, sh, or something else. (In reality, the kernel will often use the user’s default shell to interprete the file, which is very dangerous because it might not be the right interpreter at all or it might be able to parse some of it but with subtle behavioural differences such as is the case between sh and bash).

File Open Dialog in Cocoa

The Objective-C code from Rick’s World,

int i; // Loop counter.

// Create the File Open Dialog class.
NSOpenPanel* openDlg = [NSOpenPanel openPanel];

// Enable the selection of files in the dialog.
[openDlg setCanChooseFiles:YES];

// Enable the selection of directories in the dialog.
[openDlg setCanChooseDirectories:YES];

// Display the dialog. If the OK button was pressed,
// process the files.
if ( [openDlg runModalForDirectory:nil file:nil] == NSOKButton )
// Get an array containing the full filenames of all
// files and directories selected.
NSArray* files = [openDlg filenames];

// Loop through all the files and process them.
for( i = 0; i < [files count]; i++ )
NSString* fileName = [files objectAtIndex:i];

// Do something with the filename.

I was actually messing around with Monobjc and wondering how to work with NSOpenPanel, the code above provided a bit of a starting point for me. Here’s my code, which is not a translation of what’s above, but gives an example of how things work with C# and Monobjc,

NSOpenPanel openPanel = new NSOpenPanel();
openPanel.AllowsMultipleSelection =
openPanel.CanChooseFiles =
openPanel.CanChooseDirectories =
new NSSize(600, 600));

int dialogResult = openPanel.RunModal();
if (dialogResult == NSPanel.NSOKButton)
picFileName = openPanel.Filename.ToString();

The properties are self-explanatory and the code is simple enough, so I won’t bother with any sort explanation.