Good example of lua-resty-http usage

zxcvbn4038 · 2016-09-03T02:25:08+00:00

Hello! On Thu, Sep 1, 2016 at 8:01 PM, Peng Liu wrote: > How to sort the ngx.shared.DICT by key or value in a easy way? > Well, the underlying data s...

Good example of lua-resty-http usage

zxcvbn4038

Hello,

I could really use a good example of making an client request with lua-resty-http and receiving a response. In my case the response will be a json blob.

Looking though Google I see several examples of making requests but none of them, so far, really seem to address receiving the response or handling failures. If someone has a fuller example they can share I'd really like to see it!

zxcvbn4038

Just found out about ngx.location.capture, that may be more what I'm looking for

On Friday, September 2, 2016 at 2:25:08 PM UTC-4, CJ Ess wrote:

Hello,

I could really use a good example of making an client request with lua-resty-http and receiving a response. In my case the response will be a json blob.

Looking though Google I see several examples of making requests but none of them, so far, really seem to address receiving the response or handling failures. If someone has a fuller example they can share I'd really like to see it!

zxcvbn4038

Scratch that, I need to make an http requests from the ssl_certificate_by_lua_file handler and looks like ngx.location.capture is not available there since.

On Friday, September 2, 2016 at 3:34:44 PM UTC-4, CJ Ess wrote:

Just found out about ngx.location.capture, that may be more what I'm looking for

On Friday, September 2, 2016 at 2:25:08 PM UTC-4, CJ Ess wrote:
Hello,

I could really use a good example of making an client request with lua-resty-http and receiving a response. In my case the response will be a json blob.

Looking though Google I see several examples of making requests but none of them, so far, really seem to address receiving the response or handling failures. If someone has a fuller example they can share I'd really like to see it!

rpaprocki

Hi,

On Friday, September 2, 2016 at 2:25:08 PM UTC-4, CJ Ess wrote:
Hello,

I could really use a good example of making an client request with lua-resty-http and receiving a response. In my case the response will be a json blob.

Looking though Google I see several examples of making requests but none of them, so far, really seem to address receiving the response or handling failures. If someone has a fuller example they can share I'd really like to see it!

Assuming that you're talking about @pintsized's version available at https://github.com/pintsized/lua-resty-http; have you read through the Readme? The synopsis provided has a full example on using both the simple and generic interfaces, and handling errors and responses. Is there something in https://github.com/pintsized/lua-resty-http#synopsis that's unclear?

On Fri, Sep 2, 2016 at 12:42 PM, CJ Ess <zxcv...@gmail.com> wrote:

Scratch that, I need to make an http requests from the ssl_certificate_by_lua_file handler and looks like ngx.location.capture is not available there since.

Just a comment here, it may be more efficient to use another data store besides HTTP. Perhaps memcached to store JSON blobs, or redis to store hashes? Of course, if you really want HTTP in the middle of a TLS handshake, it's doable, just seems like a lot of overhead.

jonathan

Here is working code that probably does exactly that with this library -- I opensourced our ssl certificate manager a few months ago:

lua-resty-http https://github.com/pintsized/lua-resty-http
aptise certificate manager peter_sslers https://github.com/aptise/peter_sslers/blob/master/tools/nginx_lua_library/ssl_certhandler.lua

This allows you to configure an upstream internal URL for ssl certificate data in a json format as a failover for not being able to load the data from a shared-dict or redis server. It caches the data into the shared-dict as it finds it to minimize json requests.

full docs are on github:

https://github.com/aptise/peter_sslers#openrestynginx-lua-script