Hey Kris,
I played with your test this morning and it is a bug plain and (well not
so simple). The way we tear apart and rebuilt URLs has some dark
corners. If the output had been
https://webhcatTestHost.com:50111/templeton/v1/?version/hive=
I might have even said it was technically correct but
https://webhcatTestHost.com:50111/templeton/v1/?version/hive=null
Is just wrong.
The bottom line is that the URL parser isn't recording the fact that there is a
query parameter without an equal sign or value well enough. As a result, when
it is used in the expansion template via the {**}, the implied equal sign and
value of the original query parameter are used. Two problems here: 1) The
implied/default value should be the empty string not null and 2) the equal sign
should not be output if it wasn't in the original URL.
BTW, you can prove this by changing your test's inputUri to
https://knoxHost:8443/gateway/knoxTopo/templeton/v1/?version/hive=foo
and then your test's assertion to
https://webhcatTestHost.com:50111/templeton/v1/?version/hive=foo
So clearly I have some work to do.
Question for you though. Did you mean for version/hive to be a valueless query
parameter?
Kevin.
On 10/15/14, 11:08 PM, Kristopher Kane wrote:
Following the dev guide example class: testDevGuideSampleWithEvaluator
from: http://knox.apache.org/books/knox-0-4-0/dev-guide.html#Standard+Providers
outputUri = Expander.expand( template, match.getParams(), evaluator );
is returning a near match with '=null' appended to the end which is
failing my test.
Have been searching for a while but no luck yet. Ideas?
Here is the full test:
@Test
public void testRules () throws IOException, URISyntaxException {
URI inputUri, outputUri;
Matcher<Void> matcher;
Matcher<Void>.Match match;
Template input, pattern, template;
Evaluator evaluator;
WebHCatDeploymentContributor contributor = new
WebHCatDeploymentContributor();
UrlRewriteRulesDescriptor webhcatRules =
contributor.loadRulesFromTemplate();
inputUri = new URI(
"https://knoxHost:8443/gateway/knoxTopo/templeton/v1/?version/hive"; );
input = Parser.parse( inputUri.toString() );
pattern = Parser.parse(
webhcatRules.getRule("WEBHCAT/webhcat/root/inbound").template().toString()
);
template = Parser.parse( "{$serviceUrl[WEBHCAT]}/v1/?{**}" );
matcher = new Matcher<Void>();
matcher.add( pattern, null );
match = matcher.match ( input );
evaluator = new Evaluator() {
@Override
public List<String> evaluate( String function,
List<String> parameters ) {
return
Arrays.asList("https://webhcatTestHost.com:50111/templeton";);
}
};
outputUri = Expander.expand( template, match.getParams(), evaluator
);
assertThat( outputUri.toString(),
equalToIgnoringCase("https://webhcatTestHost.com:50111/templeton/v1/?version/hive";));
}
Assertion failure:
Expected:
equalToIgnoringCase("https://webhcatTestHost.com:50111/templeton/v1/?version/hive";)
but: was https://webhcatTestHost.com:50111/templeton/v1/?version/hive=null
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