[JIRA] [www] (JENKINS-13125) HTTP Content-Range Header one byte past file length

Thu, 11 Jul 2013 08:12:45 -0700

 
James Ascroft-Leigh edited a comment on Bug JENKINS-13125

I am using Jenkins 1.521 from the Jenkins APT repository on Ubuntu. I am getting a very similar symptom to the one described here i.e. when trying to view a PDF in the embedded Chrome viewer it is failing.

I have done a couple of experiments which lead me to believe that Jenkins is simply failing to include the units i.e. "bytes" in the content-range header. Is this possibly the problem?

I notice that the headers shown in previous comments don't have a unit so in my reading they don't match the production for content-range-spec in http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html section 14.16 and bytest-unit in http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html section 3.12.

My experiments:

Embedded Chrome viewer

Environment:

Ubuntu Raring
Chrome 28
Jenkins 1.521
PDF file: Not linearized, 49KB

Result:

PDF loading progress bar reaches 100% but no pages are shown

Embedded Firefox viewer (based on pdf.js)

Environment:

Ubuntu Raring
Firefox 22
Jenkins 1.521
PDF file: Not linearized, 49KB

Result:

PDF displays correctly

Standalone pdf.js

Environment:

Ubuntu Raring
Firefox 22
pdf.js mozilla-pdf.js-v0.5.5-1204-g81fa4a0
Jenkins 1.521
PDF file: Not linearized, 49KB

Result:

PDF progress bar reaches about 15% and no pages are ever displayed, _javascript_ exception

Patched standalone pdf.js

Environment:

Ubuntu Raring
Firefox 22
pdf.js mozilla-pdf.js-v0.5.5-1204-g81fa4a0 (patched, see below)
Jenkins 1.521
PDF file: Not linearized, 49KB

Result:

PDF displays correctly

Explanation:

After looking into the _javascript_ exception above, I tried a small patch to how pdf.js was parsing the header

diff -ru a/pdfjs/src/network.js b/pdfjs/src/network.js
--- a/pdfjs/src/network.js	2013-07-01 17:29:31.000000000 +0100
+++ b/pdfjs/src/network.js	2013-07-11 15:33:06.000000000 +0100
@@ -187,6 +187,9 @@
       if (xhrStatus === PARTIAL_CONTENT_RESPONSE) {
         var rangeHeader = xhr.getResponseHeader('Content-Range');
         var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader);
+        if (matches == null) {
+          var matches = /(\d+)-(\d+)\/(\d+)/.exec(rangeHeader);
+        }
         var begin = parseInt(matches[1], 10);
         pendingRequest.onDone({
           begin: begin,


I also tried downloading the artifacts and serving them up from a simple Apache HTTPD.  The embedded Chrome viewer, in fact every test, worked fine.
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