Replication through reverse proxy and

[Franck Eyraud <fr...@nospam.yrnm.net>]

Hi List,

I'm trying to use a simple "home made" node.js reverse proxy to do some 
access control; I also want the replication to go through this, but it 
doesn't go well.

The error from the the log file is this one :

Error in process <0.17319.0> with exit value: 
{function_clause,[{string,tokens1,[undefined,";",[]]},{mochiweb_util,parse_header,1},{couch_httpd,get_boundary,1},{couch_httpd,parse_multipart_request,3},{couch_replicator_api_wrap,'-open_doc_revs/6-fun-1-',4},{couch_replicator_httpc... 


[info] [<0.16444.0>] Retrying GET to 
http://...revs=true&open_revs=%5B%226-650708de185e793a94fab6718fc97e4c%22%5D&latest=true 
in 600.0 seconds due to error {function_clause, [{string,
tokens1, [undefined,";",[]]},
{mochiweb_util,parse_header,1},
{couch_httpd,get_boundary,1},
{couch_httpd,parse_multipart_request,3},
{couch_replicator_api_wrap,'-open_doc_revs/6-fun-1-',4},
{couch_replicator_httpc,process_stream_response,5}]}


Some problem in parsing the headers, could it be because the node.js 
library transform all the headers in lower case ?
If yes, does someone have some suggestion or other solution to have this 
working ?
Or is this just some problem in the proxy ?

Thanks for your help.

Franck

Re: Replication through reverse proxy and

[Franck Eyraud <fr...@nospam.yrnm.net>]

> Some problem in parsing the headers, could it be because the node.js 
> library transform all the headers in lower case ?
I'm answering to myself, sorry for bothering, but it might interest some 
of you :

Yes, it seems it is the reason : couchdb wants the headers as it emits 
them, but node.js for some reason gives them in lower case, we can force 
them back to CouchDB format before forwarding to the client :

function uCaseWord(word) {
   switch(word) {
     case 'etag':return 'ETag';
     default: return word.replace(/^./,function(l){return 
l.toUpperCase();});
   }
}

function uCaseHeader(headerName) {
   return headerName.replace(/\w*/g,uCaseWord);
}

function couchDBHeaders(nodeHeaders) {
   var couchHeaders={};
   for (var i in nodeHeaders) {
     couchHeaders[uCaseHeader(i)]=nodeHeaders[i];
   }
   return couchHeaders;
}

After patching this, I realized that I'm working with node 0.10.28, but 
future version of node.js (>= 0.11.6) gives access to the Raw Headers 
<https://github.com/joyent/node/pull/5999/commits>

Have a good night,

Franck