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2026-05-10T15:54:23Z
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imported>Jeremy-busk at 01:54, 8 March 2019
2019-03-08T01:54:37Z
<p></p>
<p><b>New page</b></p><div># Most of these involve lua<br />
<br />
Add to location<br />
<br />
Return 200 with text<br />
```<br />
add_header Content-Type text/plain;<br />
return 200 "hi";<br />
```<br />
<br />
```<br />
default_type 'text/plain';<br />
content_by_lua_block {<br />
ngx.req.read_body()<br />
local request_body = ngx.req.get_body_data()<br />
ngx.say(request_body)<br />
ngx.say('hello')<br />
ngx.say(ngx.var.arg_id)<br />
<br />
if string.find(ngx.var.request_body, "eth") then<br />
ngx.say('contains')<br />
end<br />
if ngx.re.match(ngx.var.request_body, "feth") then<br />
ngx.say('contains2')<br />
end<br />
<br />
<br />
```<br />
<br />
Loging vars in lua to error log<br />
```<br />
ngx.log(ngx.ERR, 'mytest or var');<br />
```<br />
<br />
```<br />
p = 666<br />
d = "23.42"<br />
payload='{"d":[{"pres":'..(p)..',"temp":"'..(d)..'"}]}'<br />
t = cjson.decode(payload)<br />
print(t.d[1].temp) -- prints "23.42"<br />
```<br />
<br />
# Getting Headers<br />
<br />
```<br />
local h = ngx.req.get_headers()<br />
for k, v in pairs(h) do<br />
ngx.say(k, ": ", v)<br />
end<br />
```<br />
<br />
```<br />
local redis = require "nginx.redis"<br />
local rdb = redis:new()<br />
rdb:set_timeout(1000) -- 1 sec<br />
local ok, err = rdb:connect("127.0.0.1", 6379)<br />
if not ok then<br />
ngx.say("failed to connect: ", err)<br />
return<br />
end<br />
<br />
if res ~= ngx.var.http_authorization then<br />
ngx.say("Failed http authorization.")<br />
return<br />
end<br />
<br />
ngx.encode_base64("myuser:pass")<br />
<br />
if res ~= ngx.var.http_authorization then<br />
ngx.say("Failed http authorization.")<br />
return<br />
end<br />
<br />
```<br />
<br />
# Resources<br />
<br />
* https://github.com/david-martin/nginx-request-body-example<br />
* https://github.com/jeremybusk/openresty/blob/dev/sandbox/nginx-lua-ptables.conf</div>
imported>Jeremy-busk