Adding upstream version 2.4.38.upstream/2.4.38upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/modules/lua/docs/writing-handlers.txt b/modules/lua/docs/writing-handlers.txt
new file mode 100644
index 0000000..2f18c41
--- /dev/null
+++ b/modules/lua/docs/writing-handlers.txt
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+mod_lua always looks to invoke a function for the handler, rather than
+just evaluating a script body CGI style. A handler function looks
+something like this:
+
+    -- example.lua --
+    require "string"
+
+    function handle_something(r)
+        r.content_type = "text/plain"
+        r:puts("Hello Lua World!\n")
+    
+        if r.method == 'GET' then
+            for k, v in pairs( r:parseargs() ) do
+                r:puts( string.format("%s: %s", k, v) )
+            end
+        elseif r.method == 'POST' then
+            for k, v in pairs( r:parsebody() ) do
+                r:puts( string.format("%s: %s", k, v) )
+            end
+        else
+            r:puts("unknown HTTP method " .. r.method)
+        end 
+    end
+
+This handler function just prints out the uri or form encoded
+arguments to a plaintext page.
+
+This means (and in fact encourages) that you can have multiple
+handlers (or hooks, or filters) in the same script.
+
+Data Structures:
+    request_rec:
+        the request_rec is mapped in as a userdata. It has a metatable
+        which lets you do useful things with it. For the most part it
+        has the same fields as the request_rec struct (see httpd.h 
+        until we get better docs here) many of which are writeable as
+        well as readable, and has (at least) the following methods:
+        
+        r:puts("hello", " world", "!") -- print to response body
+        
+        -- logging functions
+        r:debug("This is a debug log message")
+        r:info("This is an info log message")
+        r:notice("This is an notice log message")
+        r:warn("This is an warn log message")
+        r:err("This is an err log message")
+        r:alert("This is an alert log message")
+        r:crit("This is an crit log message")
+        r:emerg("This is an emerg log message")