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Posted to users@trafficserver.apache.org by Hiroaki Nakamura <hn...@gmail.com> on 2016/05/10 08:20:29 UTC
Is there a way to handle multiple headers of the same name using
TSLua plugin?
Hi all,
I tried to get two Cache-Control headers using TSLua plugin
with the following code.
```
function do_global_read_response()
ts.http.set_debug(DEBUG)
headers = ts.server_response.get_headers()
for k, v in pairs(headers) do
ts.debug("server_response.header: k=" .. k .. ", v=" .. v)
end
end
```
However, I got just one value of Cache-Control from
ts.server_response.get_headers()
although there are two Cache-Control lines in "Incoming O.S. Response".
Is there a way to handle multiple headers of the same name using TSLua plugin?
traffic.out
```
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Connection, v=keep-alive
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Date, v=Tue, 10 May 2016 08:10:52 GMT
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Content-Type, v=image/jpeg
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Cache-Control, v=s-maxage=180
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Etag, v="3e5a3b-5280bf0e2f776"
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Last-Modified, v=Tue, 29 Dec 2015 16:30:34
GMT
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Via, v=http/1.1
copr-builder-960458626.novalocal (ApacheTrafficServer-second
[uScSsNfUpSeN:t cCSi p sS])
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Content-Length, v=4086331
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Age, v=0
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Accept-Ranges, v=bytes
[May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
server_response.header: k=Server, v=ATS
...(snip)...
+++++++++ Incoming O.S. Response +++++++++
-- State Machine Id: 0
HTTP/1.1 200 OK
Date: Tue, 10 May 2016 08:10:52 GMT
Server: ATS
Last-Modified: Tue, 29 Dec 2015 16:30:34 GMT
ETag: "3e5a3b-5280bf0e2f776"
Accept-Ranges: bytes
Content-Length: 4086331
Content-Type: image/jpeg
Cache-Control: public
Cache-Control: s-maxage=180
Age: 0
Connection: keep-alive
Via: http/1.1 copr-builder-960458626.novalocal
(ApacheTrafficServer-second [uScSsNfUpSeN:t cCSi p sS])
```
Regards,
Hiroaki
Re: Is there a way to handle multiple headers of the same name using
TSLua plugin?
Posted by Hiroaki Nakamura <hn...@gmail.com>.
Hi Shu,
Thanks for you response.
I read http://stackoverflow.com/questions/4371328/are-duplicate-http-response-headers-acceptable/4371395#4371395
and am trying to modify ts.*.get_headers in TSLua to concatenate
multiple values of the same header.
If it turns out to works for me, I will send a pull request.
Thanks.
2016-05-10 18:41 GMT+09:00 Shu Kit Chan <ch...@gmail.com>:
> Unfortunately not right now. Suggestions to the syntax change as well as
> patches are welcome.
>
> Thanks.
>
> Kit
>
> On Tue, May 10, 2016 at 1:20 AM, Hiroaki Nakamura <hn...@gmail.com>
> wrote:
>>
>> Hi all,
>>
>> I tried to get two Cache-Control headers using TSLua plugin
>> with the following code.
>>
>> ```
>> function do_global_read_response()
>> ts.http.set_debug(DEBUG)
>>
>> headers = ts.server_response.get_headers()
>> for k, v in pairs(headers) do
>> ts.debug("server_response.header: k=" .. k .. ", v=" .. v)
>> end
>> end
>> ```
>>
>> However, I got just one value of Cache-Control from
>> ts.server_response.get_headers()
>> although there are two Cache-Control lines in "Incoming O.S. Response".
>>
>> Is there a way to handle multiple headers of the same name using TSLua
>> plugin?
>>
>> traffic.out
>>
>> ```
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Connection, v=keep-alive
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Date, v=Tue, 10 May 2016 08:10:52 GMT
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Content-Type, v=image/jpeg
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Cache-Control, v=s-maxage=180
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Etag, v="3e5a3b-5280bf0e2f776"
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Last-Modified, v=Tue, 29 Dec 2015 16:30:34
>> GMT
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Via, v=http/1.1
>> copr-builder-960458626.novalocal (ApacheTrafficServer-second
>> [uScSsNfUpSeN:t cCSi p sS])
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Content-Length, v=4086331
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Age, v=0
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Accept-Ranges, v=bytes
>> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
>> server_response.header: k=Server, v=ATS
>>
>> ...(snip)...
>>
>> +++++++++ Incoming O.S. Response +++++++++
>> -- State Machine Id: 0
>> HTTP/1.1 200 OK
>> Date: Tue, 10 May 2016 08:10:52 GMT
>> Server: ATS
>> Last-Modified: Tue, 29 Dec 2015 16:30:34 GMT
>> ETag: "3e5a3b-5280bf0e2f776"
>> Accept-Ranges: bytes
>> Content-Length: 4086331
>> Content-Type: image/jpeg
>> Cache-Control: public
>> Cache-Control: s-maxage=180
>> Age: 0
>> Connection: keep-alive
>> Via: http/1.1 copr-builder-960458626.novalocal
>> (ApacheTrafficServer-second [uScSsNfUpSeN:t cCSi p sS])
>> ```
>>
>> Regards,
>> Hiroaki
>
>
Re: Is there a way to handle multiple headers of the same name using
TSLua plugin?
Posted by Shu Kit Chan <ch...@gmail.com>.
Unfortunately not right now. Suggestions to the syntax change as well as
patches are welcome.
Thanks.
Kit
On Tue, May 10, 2016 at 1:20 AM, Hiroaki Nakamura <hn...@gmail.com>
wrote:
> Hi all,
>
> I tried to get two Cache-Control headers using TSLua plugin
> with the following code.
>
> ```
> function do_global_read_response()
> ts.http.set_debug(DEBUG)
>
> headers = ts.server_response.get_headers()
> for k, v in pairs(headers) do
> ts.debug("server_response.header: k=" .. k .. ", v=" .. v)
> end
> end
> ```
>
> However, I got just one value of Cache-Control from
> ts.server_response.get_headers()
> although there are two Cache-Control lines in "Incoming O.S. Response".
>
> Is there a way to handle multiple headers of the same name using TSLua
> plugin?
>
> traffic.out
>
> ```
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Connection, v=keep-alive
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Date, v=Tue, 10 May 2016 08:10:52 GMT
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Content-Type, v=image/jpeg
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Cache-Control, v=s-maxage=180
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Etag, v="3e5a3b-5280bf0e2f776"
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Last-Modified, v=Tue, 29 Dec 2015 16:30:34
> GMT
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Via, v=http/1.1
> copr-builder-960458626.novalocal (ApacheTrafficServer-second
> [uScSsNfUpSeN:t cCSi p sS])
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Content-Length, v=4086331
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Age, v=0
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Accept-Ranges, v=bytes
> [May 10 17:10:52.540] Server {0x2abab99e4700} DIAG: (ts_lua)
> server_response.header: k=Server, v=ATS
>
> ...(snip)...
>
> +++++++++ Incoming O.S. Response +++++++++
> -- State Machine Id: 0
> HTTP/1.1 200 OK
> Date: Tue, 10 May 2016 08:10:52 GMT
> Server: ATS
> Last-Modified: Tue, 29 Dec 2015 16:30:34 GMT
> ETag: "3e5a3b-5280bf0e2f776"
> Accept-Ranges: bytes
> Content-Length: 4086331
> Content-Type: image/jpeg
> Cache-Control: public
> Cache-Control: s-maxage=180
> Age: 0
> Connection: keep-alive
> Via: http/1.1 copr-builder-960458626.novalocal
> (ApacheTrafficServer-second [uScSsNfUpSeN:t cCSi p sS])
> ```
>
> Regards,
> Hiroaki
>