Library of useful functions, by Ed Falk

For the most part, you want to copy these modules into your own source code.

The Java modules were written with Android in mind, but you can easily remove the Android dependencies from Matrix3d and Utils

Name	What it is
Matrix3d.java	3-d matrices, with an emphasis on 3d graphics
RandColors.java	Assign random colors to backgrounds of all the widgets; used to debug layouts.
SetDialogSize.java	Code fragment; sets the size of a dialog to 90% of the screen width
Timer.java	Schedule and receive periodic alarms
Utils.java	Small utilities
WebHelper.java	HTTP utilities, based on apache.http
MultiPartProducer.java	Post multipart/form-data; used with Apache HTTP
aho-corasick.py	Aho-Corasick string matching algorithm

Utils.java

This static class contains a number of small useful utilities.

Written for Android but you can replace the logging calls with something else.

Static Methods:

Return	Method	Brief description
void	where(Throwable)	Dump stack given a Throwable
String	where(Throwable, String methodName)	Return one specific entry from stack
String	inputStreamAsString(InputStream s)	Read a string from an InputStream
void	closeQuietly(Closeable)	Closes 'closeable', ignoring any checked exceptions
boolean	sleep(int ms)	Sleep, return true if interrupted

WebHelper.java

This class contains enough functionality that it's worth describing in detail.

For the most part, this class consists of convenience wrappers around the Apache HTTP library.

Note: totally obsolete. Yours truly blew an Android interview because I relied on this class. Might still be useful on systems that still support the Apache http stack, but honestly, just use java.net.

Constructor

Method	Brief description
WebHelper()	Create WebHelper object
WebHelper(String url)	Create WebHelper object (not commonly used)

The second form can be used with getArgs(String args). Typically this is used when all requests are to the same cgi script and only the arguments change.

Methods:

Return	Method	Brief description
HttpResponse	get(String url)	GET a url, return HttpResponse
HttpResponse	get(HttpRequestBase req)	GET a url, return HttpResponse
InputStream	getStream(String url)	GET a url, return InputStream
InputStream	getStream(HttpRequestBase)	GET a url, return InputStream
InputStream	getStream(HttpResponse)	Exctract the stream from a response
String	getString(String url)	GET a url, return String
String	getString(HttpRequestBase)	GET a url, return String
String	getString(HttpResponse)	Extract a string from a response
InputStream	getArgs(String url, String args)	Append args to url and get()
InputStream	getArgs(String args)	Same, use default url
HttpResponse	head(String url)	HEAD request, return HttpResponse
HttpResponse	post(url, String data)	POST request with data, return HttpResponse
HttpResponse	post(url, List data)	POST request with list of name/value pairs
HttpResponse	post(url, Map data)	POST request with map of name/value pairs
HttpResponse	post(url, name, value, ...)	POST request with name/value pairs in line
HttpResponse	post(url, from,file,name)	POST multipart, one file
HttpResponse	post(url, HttpEntity)	POST arbitrary request, arbitrary data entity
HttpResponse	post(HttpPost, HttpEntity)	POST arbitrary request, arbitrary data entity
HttpEntity	entity(HttpResponse resp)	Convert HttpResponse to HttpEntity
InputStream	inputStream(HttpEntity entity)	Convert HttpEntity to InputStream

Static Utility Methods:

Return	Method	Brief description
InputStream	getStream(HttpResponse)	Convert HttpResponse to InputStream
String	getString(InputStream)	Convert InputStream to String
String	getString(HttpResponse)	Convert HttpResponse to String
String	getString(InputStream)	Convert InputStream to String
HttpEntity	entity(HttpResponse)	Convert HttpResponse to HttpEntity
InputStream	inputStream(HttpEntity)	convert HttpEntity to InputStream