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jdavidb (1361)

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J. David Blackstone has a Bachelor of Science in Computer Science and Engineering and nine years of experience at a wireless telecommunications company, where he learned Perl and never looked back. J. David has an advantage in that he works really hard, he has a passion for writing good software, and he knows many of the world's best Perl programmers.

Journal of jdavidb (1361)

Thursday May 08, 2008
03:10 PM

Java: Gotta POST

[ #36360 ]

I'm interacting with a .NET (I think) webservice, and I have to create a URL-encoded POST request. Conceptually, no biggie: I've used for years and understand the concept well. (Better than ASP.NET webservices, apparently, as I am aware that semicolon is a valid substitute for ? as a variable separator and ASP.NET webservices are not.) But of course I'm doing this from Java, so there's the extra work of looking up the right library^Wseventeen libraries to use.

Except that the libraries don't seem to fully cover this. Thankfully there's a URLEncoder class, or might just crawl away and die, but there's nothing to create the whole POST request for me from a HashMap or something. I have to generate all the headers myself, including the content-length, and I have to encode each parameter individually and glue them all together myself with = and ;. I mean = and &.

Annoying. So I guess I'll subclass HashMap myself and do it that way. Fun little exercise, I suppose, but this should be there for me.

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  • Don't use a subclass of HashMap. Write a class that implements Map, and keep a HashMap internally. That'll be much more flexible.
    • It's a little late. :)

      But really, I don't see how I'm more flexible for implementing Map than simply subclassing HashMap. That just seems like a lot of trouble writing delegates methods that would otherwise just be there if I subclass. It's probably because Perl is the screwdriver with which I attempt to hammer every nail, and the Perl version of hashes as one of the three fundamental data structures is indelibly marked on my mind.

      I suppose it makes things easier if ever I want to use some other struc

      J. David works really hard, has a passion for writing good software, and knows many of the world's best Perl programmers