Hello, I'm a total ruby newbie and am developing a simple app that tests an existing web app. Part of the request I need to post contains data that needs to be compressed as the web app will uncompress it. Currently, the java app just uses simple java.util.zip.Inflater to do this, and I've been able to do this from cocoa to java no problem. Using Ruby to craft the data and post request has presented a problem: when the web app gets the request, I'm getting exceptions from java.utl.zip Unkown Compression format I can't change the back end, only the ruby client side. Does anybody know how to properly use the ruby zlib library to deflate data such that java's built in classes can inflate it? Sorry if this is a basic question; I've googled this to death and hit nothing but dead ends. Here's the call that compresses:
Hello, I'm a total ruby newbie and am developing a simple app that tests an existing web app. Part of the request I need to post contains data that needs to be compressed as the web app will uncompress it. Currently, the java app just uses simple java.util.zip.Inflater to do this, and I've been able to do this from cocoa to java no problem. Using Ruby to craft the data and post request has presented a problem: when the web app gets the request, I'm getting exceptions from java.utl.zip Unkown Compression format I can't change the back end, only the ruby client side. Does anybody know how to properly use the ruby zlib library to deflate data such that java's built in classes can inflate it? Sorry if this is a basic question; I've googled this to death and hit nothing but dead ends. Here's the call that compresses:
Hello, I'm a total ruby newbie and am developing a simple app that tests an existing web app. Part of the request I need to post contains data that needs to be compressed as the web app will uncompress it. Currently, the java app just uses simple java.util.zip.Inflater to do this, and I've been able to do this from cocoa to java no problem. Using Ruby to craft the data and post request has presented a problem: when the web app gets the request, I'm getting exceptions from java.utl.zip Unkown Compression format I can't change the back end, only the ruby client side. Does anybody know how to properly use the ruby zlib library to deflate data such that java's built in classes can inflate it? Sorry if this is a basic question; I've googled this to death and hit nothing but dead ends.
Did you find rubyzip? It doesn't seem to work under Ruby 1.9, but it does have an interface supposedly modeled on java.util.zip:
Sorry, should have been more clear, I'm not creating files. I did find it, but it seems entirely focused on zip files; I'm just using the deflate/inflate to squeeze some data before sending it over the wire. Being that they're both based on zlib, you'd think that deflated from one would be inflatable by the other and I was hoping that perhaps I'm just missing a setting or not using a correct parameter to one of the ruby calls. But, I've pretty much tried every permutation and cannot get the server to inflate the data. I'd think somebody's doing this somewhere with success.
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On Apr 4, 2009, at 4:39 PM, Jeff Schwab wrote:
Dom wrote:
Hello, I'm a total ruby newbie and am developing a simple app that tests an existing web app. Part of the request I need to post contains data that needs to be compressed as the web app will uncompress it. Currently, the java app just uses simple java.util.zip.Inflater to do this, and I've been able to do this from cocoa to java no problem. Using Ruby to craft the data and post request has presented a problem: when the web app gets the request, I'm getting exceptions from java.utl.zip Unkown Compression format I can't change the back end, only the ruby client side. Does anybody know how to properly use the ruby zlib library to deflate data such that java's built in classes can inflate it? Sorry if this is a basic question; I've googled this to death and hit nothing but dead ends.
Did you find rubyzip? It doesn't seem to work under Ruby 1.9, but it does have an interface supposedly modeled on java.util.zip:
Sorry, should have been more clear, I'm not creating files. I did
find it, but it seems entirely focused on zip files; I'm just using
the deflate/inflate to squeeze some data before sending it over the
wire. Being that they're both based on zlib, you'd think that deflated
from one would be inflatable by the other and I was hoping that
perhaps I'm just missing a setting or not using a correct parameter to
one of the ruby calls. But, I've pretty much tried every permutation
and cannot get the server to inflate the data. I'd think somebody's
doing this somewhere with success.
Could it be that your java side is expecting the new zlib format?
As could be seen in your first post, you are using -MAX_WBITS, which
enables old (headerless? don't know what it's called) zlib format, that
has no gzip header and no checksum. Maybe you should be using +MAX_WBITS
(the default), which adds necessary header and checksum.
Agreed, you probably only want -MAX_WBITS when implementing a gzip stream.
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On Apr 5, 2009, at 02:48, Alexey Borzenkov wrote:
Could it be that your java side is expecting the new zlib format?
As could be seen in your first post, you are using -MAX_WBITS, which
enables old (headerless? don't know what it's called) zlib format, that
has no gzip header and no checksum. Maybe you should be using +MAX_WBITS
(the default), which adds necessary header and checksum.
