Re: [Gmod-ajax] failed displaying BAM file: HTTP undefined when fetching

[Colin <col...@gm...>]

I can see from the Chrome Devtools that the range requests for the BAM file
produce this error

net::ERR_CONTENT_DECODING_FAILED

"This can happen when an HTTP request's headers claim that the content is
gzip encoded"

https://superuser.com/questions/172951/chrome-error-330-neterr-content-decoding-failed

Doing curl of the file shows that the response has this on the response

Content-Encoding: x-gzip

Basically you do not want this header on your response. Some common things
include having mod_deflate on the server, but it's hard to know exactly
what server side conditions caused this


-Colin

On Tue, Feb 11, 2020 at 11:44 AM Pengcheng Yang <pen...@qq...> wrote:

> Hi Colin,
>
> I have just checked the Network tab in the chrome devtools and full screen
> shot is shown below. Please help me check how could I resolve this problem.
>
>
> Thank you and best,
>
> pengcheng
> On 2020-2-11 23:17, Colin wrote:
>
> Could you look at the network tab in the chrome devtools and see if there
> are any indicators of what the network request says?  Maybe paste a full
> screenshot of the network tab?
>
> The server itself will never produce "HTTP status that is undefined" but
> sometimes things in the middle e.g. firewall or decoding of the request can
> cause HTTP status to be 0 or undefined
>
> An example may be gzip related, as the browser might receive a bad
> response containing the wrong gzip headers, then try to ungzip the data,
> and then maybe fail
>
> -Colin
>
> On Tue, Feb 11, 2020 at 6:32 AM Pengcheng Yang <pen...@qq...> wrote:
>
>> Dear JBrowsers:
>>
>> I am trying loading BAM file as the documentation suggested. However, I
>> am failed with the error message said "Error: HTTP undefined when fetching
>> http://...."
>>
>>
>> The json configuration information is:
>>
>>       {
>>         "category": "RNA-Seq",
>>         "key" : "TR2010b",
>>         "label": "TR2010b",
>>         "storeClass"  : "JBrowse/Store/SeqFeature/BAM",
>>         "type"        : "JBrowse/View/Track/Alignments2",
>>         "urlTemplate": "BAM/TR2012b.fa.map.bam",
>>         "baiUrlTemplate" : "BAM/TR2012b.fa.map.bam.bai"
>>       }
>>
>> Could anyone help me out?
>>
>> Thank you and best,
>>
>> Pengcheng Yang
>>
>>
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>