[RFC/PATCH 1/3] gitweb: make suspenders more useful

[RFC/PATCH 1/3] gitweb: make suspenders more useful

[Mark Rada]

In the first block of checks to validate a snapshot request, the last
check is never executed because the second last check is a superset of
the last check.

This change will switch the order of the last two checks, it has the
advantage of giving clients a more specific reason why they cannot get
a specific snapshot format instead of giving them the more generic
response.

Signed-off-by: Mark Rada <marada@uwaterloo.ca>
---
 gitweb/gitweb.perl |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 4a42f61..7068db2 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -5174,10 +5174,10 @@ sub git_snapshot {
 		die_error(400, "Invalid snapshot format parameter");
 	} elsif (!exists($known_snapshot_formats{$format})) {
 		die_error(400, "Unknown snapshot format");
-	} elsif (!grep($_ eq $format, @snapshot_fmts)) {
-		die_error(403, "Unsupported snapshot format");
 	} elsif ($known_snapshot_formats{$format}{'disabled'}) {
 		die_error(403, "Snapshot format not allowed");
+	} elsif (!grep($_ eq $format, @snapshot_fmts)) {
+		die_error(403, "Unsupported snapshot format");
 	}
 
 	if (!defined $hash) {
-- 
Mark A Rada (ferrous26)
marada@uwaterloo.ca

Re: [RFC/PATCH 1/3] gitweb: make suspenders more useful

[Sam Vilain]

Mark Rada wrote:
> Subject: [RFC/PATCH 1/3] gitweb: make suspenders more useful

Suspenders?  Really?

Sam

Re: [RFC/PATCH 1/3] gitweb: make suspenders more useful

[Mark Rada]

On 23/08/09 6:10 PM, Sam Vilain wrote:
> Mark Rada wrote:
>> Subject: [RFC/PATCH 1/3] gitweb: make suspenders more useful
> 
> Suspenders?  Really?
> 
> Sam
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Context:

On 21/08/09 5:43 PM, Junio C Hamano wrote:
> Mark A Rada <marada@uwaterloo.ca> writes:
> 
>> Unless I missed a case, the tests show that the extra condition check
>> that was added in the &git_snapshot routine is never actually executed,
>> because a disabled snapshot format is not added to @snapshot_fmts, which
>> is checked first.
>>
>> snippet:
>> 5178     } elsif (!grep($_ eq $format, @snapshot_fmts)) {
>> 5179         die_error(403, "Unsupported snapshot format");
>> 5180     } elsif ($known_snapshot_formats{$format}{'disabled'}) {
>> 5181         die_error(403, "Snapshot format not allowed");
>> 5182     }
>> 5183
> 
> True; filter_snapshot_fmts looks at 'disabled' first.
> 
> I do not mind keeping these two lines as belt-and-suspender, though.
> 


Yup...I couldn't think of an appropriate title and I expect this
patch to be edited (for another reason) or thrown out anyways.



-- 
Mark A Rada (ferrous26)
marada@uwaterloo.ca

Re: [RFC/PATCH 1/3] gitweb: make suspenders more useful

[Sam Vilain]

Mark Rada wrote:
>>> Subject: [RFC/PATCH 1/3] gitweb: make suspenders more useful
>>>       
>> Suspenders?  Really?
>>     
> Context:
>
> On 21/08/09 5:43 PM, Junio C Hamano wrote:
>   
>> I do not mind keeping these two lines as belt-and-suspender, though.
>>     
> Yup...I couldn't think of an appropriate title and I expect this
> patch to be edited (for another reason) or thrown out anyways.
>   

Please don't do that.  Use of metaphors makes the code harder to follow,
especially for non-native speakers.  In this case you confused me, a
British/NZ native speaker because you only used half of the idiom; so
all I was left with was a word which in the English where I speak refers
to a piece of clothing worn most often by prostitutes and people at the
Rocky Horror Picture Show.

Can I suggest "snapshot error handling" as a more neutral term...
Sam

[RFC/PATCH 1/3] gitweb: improve snapshot error handling

[Mark Rada]

Ok, this is just a resend of the first patch in my set from
earlier, but with some of the commit message reworded, namely
the subject (as suggested by Sam Vilain).

--
Mark Rada (ferrous26)
marada@uwaterloo.ca


--->8---
In the second block of checks to validate a snapshot request, the last
check is never executed because the second last check is a superset of
the last check.

This change will switch the order of the last two checks, it has the
advantage of giving clients a more specific reason why they cannot get
a snapshot format if the format they have chosen is disabled.

Signed-off-by: Mark Rada <marada@uwaterloo.ca>
---
 gitweb/gitweb.perl |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 4a42f61..7068db2 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -5174,10 +5174,10 @@ sub git_snapshot {
 		die_error(400, "Invalid snapshot format parameter");
 	} elsif (!exists($known_snapshot_formats{$format})) {
 		die_error(400, "Unknown snapshot format");
-	} elsif (!grep($_ eq $format, @snapshot_fmts)) {
-		die_error(403, "Unsupported snapshot format");
 	} elsif ($known_snapshot_formats{$format}{'disabled'}) {
 		die_error(403, "Snapshot format not allowed");
+	} elsif (!grep($_ eq $format, @snapshot_fmts)) {
+		die_error(403, "Unsupported snapshot format");
 	}
 
 	if (!defined $hash) {
-- 
1.6.4