you can use gists and link to them.
i remember, that underscore has a wrap function, you could use it or copy
it's implementation.
Am Donnerstag, 21. Februar 2013 09:37:53 UTC+1 schrieb deitch:
>
> So I did something like this (pseudocode), works pretty well. I am
> currently using it to transparently cache requests. This would be *so* much
> easier if google groups supported markdown like github.
> // config includes what to call next in the chain, ttl for my cache, and a
> secret key to flush the cache remotely, etc. In one instance, I have a list
> of regex for which to invoke on the URL
> module.exports = function(config) {
> return function(req,res,next) {
> wrapResponse(res);
> // do the next thing
> };
> };
>
> wrapResponse looks like:
>
> wrapResponse = function(res) {
> write = res.write, writeHead = res.writeHead, setHeader = res.setHeader,
> removeHeader = res.removeHeader, end = res.end;
> res.write = function(chunk,encoding) {
> // do what you want with it, like caching
> write.apply(this,arguments);
> };
> };
>
> The above is generic, but I turned it into a nice performant in-memory
> caching module to wrap node-http-proxy. Variable ttl, and external
> flushable.
>
> On Wednesday, February 20, 2013 10:50:12 PM UTC+2, deitch wrote:
>>
>> Just introspection. I am happy to let it go along its way in both
>> directions, as long as I can peek in and see what data passes.
>>
>> On Wednesday, February 20, 2013 10:42:59 PM UTC+2, greelgorke wrote:
>>>
>>> it's not clear how/what for you want to utilize the response.
>>> introspection? manipulation?
>>>
>>> Am Mittwoch, 20. Februar 2013 21:05:35 UTC+1 schrieb deitch:
>>>>
>>>> Yeah, I should have been more clear, shouldn't I?
>>>>
>>>> Adding handling to node-http-proxy. It takes as its input the
>>>> (request,response) pair from an http server callback handler. I want to
>>>> wrap it so I can cache as well as some other processing.
>>>>
>>>> Normal http operation looks like this:
>>>>
>>>> Client ----> Node
>>>>
>>>> Proxy operation looks like this
>>>>
>>>> Client ----> Node (running node-http-proxy) ----> Remote service
>>>>
>>>> What I am trying to do:
>>>>
>>>>
>>>> Client ----> Node (running my handler, passes to node-http-proxy) ---->
>>>> Remote service
>>>>
>>>> It is easier to get in front of the request; I want to be able to
>>>> instrument the response.
>>>>
>>>> Is that clearer?
>>>>
>>>>
>>>>
>>>> On Wednesday, February 20, 2013 9:24:21 PM UTC+2, greelgorke wrote:
>>>>>
>>>>> what exactly are you trying to do? of course you can always wrap
>>>>> anything and observe actions etc., but it's not the problem you're trying
>>>>> to solve in first place, right?
>>>>>
>>>>> Am Mittwoch, 20. Februar 2013 16:46:31 UTC+1 schrieb deitch:
>>>>>>
>>>>>> Is there any way to wrap http.serverResponse?
>>>>>>
>>>>>> E.g. I am using a module that takes as its input http.serverRequest
>>>>>> and http.serverResponse. I want to be able to transparently catch any
>>>>>> actions that the module performs on http.serverResponse so I can cache
>>>>>> the
>>>>>> statusCode, header and response.
>>>>>>
>>>>>> Do I have to override each and every major function - write,
>>>>>> writeHead, end, setHeader, removeHeader - to do so? Is there a simpler
>>>>>> way?
>>>>>> I thought about looking for some 'end' type event, but that would miss
>>>>>> all
>>>>>> of the streaming data.
>>>>>>
>>>>>>
>>>>>>
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