OpenResty default does not provide Http client, you need to use third-party plug-ins
we can search for the appropriate client from the github, such as HTTPS: // github.com/pintsized/lua-resty-http
Installation: Lua -resty- HTTP / lib / Resty / http.lua http_headers.lua directory and
two files are copied to / usr / local / openresty / lualib / to the Resty directory
(assuming openResty installation directory / usr / local / openresty)
local RES , ERR = httpc: REQUEST_URI (URI, {
Method = " the POST / the GET " , --- request mode
Query = STR, --- GET parameter transfer mode
body = STR, --- POST-parameters manner
path = " URL "---- Path
headers = {--- header parameter
[ " the Content-the Type " ] = " file application / JSON " ,
}
})
Example: preparation of simulated query request Lynx
- introducing http module
local http = the require ( " resty.http " )
- Creating http client instance
local httpc = http: new new ()
local RESP, ERR = httpc: REQUEST_URI ( " https://list.tmall.com " ,
{
Method, = " GET " , - -Request method
--path = " /search_product.htm?q=ipone " ,
Query = " Q = iPhone " , --- GET parameter transfer mode
body = " name = 'Jack' = 18 is & Age " , --- POST mode parameters passed
path = " /search_product.htm " , ---- path
--- header parameter
headers = {[ " the User-- Agent " ] = " the Mozilla / 5.0 (the Windows NT 6.1; the WOW64) AppleWebKit / 537.36 (KHTML, like Gecko) Chrome / 40.0.2214.111 Safari / 537.36 "}
})
IF Not RESP the then
ngx.say ( " Request error: " , ERR)
return
End
- Get Status Code
ngx.status = resp.status
- Get Information Response
- Transfer- response header Encoding Connection and can be ignored, because this data is current server output.
- obtaining the header information through the returned
for K, V in pairs (resp.headers) do
IF K = ~ " Transfer-Encoding " and K ~ = " Connection " the then
ngx.header [K] = V
End
IF type (V ) =="table" then
ngx.log(ngx.WARN,"table:"..k, ": ", table.concat(v, ", "))
else
ngx.log(ngx.WARN,"one:"..k, ": ", v)
end
end
ngx.say("end")
--响应体
ngx.say(resp.body)
httpc:close()
httpc:Close ()
-f logs /tail/ usr / local / openresty / Nginx] #
#
# background logdebug.log
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:ufe-result: A6, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:Date: Fri, 23 Aug 2019 09:58:04 GMT, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:Location: https://login.taobao.com/jump?target=https%3A%2F%2Flist.tmall.com%2Fsearch_product.htm%3Ftbpm%3D1%26q%3Diphone, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:Connection: keep-alive, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:EagleEye-TraceId: 0bfa16f315665542845385751e42fa, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:Strict-Transport-Security: max-age=0, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:Content-Length: 0, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:Timing-Allow-Origin: *, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
2019/08/23 17:58:04 [warn] 25373#0: *131 [lua] testhttp02.lua:32: one:Server: Tengine/Aserver, client: 192.168.10.164, server: www.server1.com, request: "GET /testhttp02 HTTP/1.1", host: "192.168.10.164"
-------------------------------------------------- -----
found error
Request error: NO defined the resolver to resolve " list.tmall.com "
this error is because you want to configure DNS resolvers the resolver 8.8 . 8.8 , otherwise the domain name is unresolved.
In nginx.conf profile http module add the Resolver 8.8 . 8.8 ; IP address of the DNS server provided by Google free of
Once configured, restart nginx
------------------- --------------------------------------
access https error because we https access, you need to configure ssl certificate
in nginx configuration file, server virtual host module disposed
lua_ssl_verify_depth 2 ;
lua_ssl_trusted_certificate " /etc/ssl/certs/ca-bundle.crt " ;
-------------------------------------------------- ------
http module application scenarios are many, here only a brief introduction about using the http module
, there are many openresty module, can refer to HTTPS: // github.com/bungle/awesome-resty
to suning.com example:
http local = The require ( " resty.http " )
- Creating http client instance
local httpc = http: new new ()
local RESP, ERR = httpc: REQUEST_URI ( " http://issm.suning.com " ,
{
Method, = " GET " ,
path = " /productDetail_P11271.htm " ,
headers{= [ " The User-- Agent " ] = " the Mozilla / 5.0 (the Windows NT 6.1; the WOW64) AppleWebKit / 537.36 (KHTML, like the Gecko) the Chrome / 40.0.2214.111 Safari / 537.36 " }
})
IF Not RESP the then
ngx.say ( " Request error: " , ERR)
return
End
- Get status code
ngx.status = resp.status
- Get information response
- Transfer- response header Encoding Connection and can be ignored, because the output data is the current server.
for K, V in pairs (resp.headers) do
IF K = ~ " Transfer-Encoding" and k ~= "Connection" then
ngx.header[k] =v
end
end
--响应体
ngx.say(resp.body)
httpc:close()
