add a few example scripts

Makefile

@@ -43,7 +43,7 @@ $(OBJ): config.h Makefile $(LDIR)/libluajit.a | $(ODIR)
 $(ODIR):
 	@mkdir -p $@
 
-$(ODIR)/bytecode.o: scripts/wrk.lua
+$(ODIR)/bytecode.o: src/wrk.lua
 	@echo LUAJIT $<
 	@$(SHELL) -c 'cd $(LDIR) && ./luajit -b $(CURDIR)/$< $(CURDIR)/$@'
 

README

@@ -5,7 +5,8 @@ wrk - a HTTP benchmarking tool
   design with scalable event notification systems such as epoll and kqueue.
 
   An optional LuaJIT script can perform HTTP request generation, response
-  processing, and custom reporting.
+  processing, and custom reporting. Several example scripts are located in
+  scripts/
 
 Basic Usage
 

scripts/auth.lua

@@ -0,0 +1,18 @@
+-- example script that demonstrates response handling and
+-- retrieving an authentication token to set on all future
+-- requests
+
+token = nil
+path  = "/authenticate"
+
+request = function()
+   return wrk.format("GET", path)
+end
+
+response = function(status, headers, body)
+   if not token and status == 200 then
+      token = headers["X-Token"]
+      path  = "/resource"
+      wrk.headers["X-Token"] = token
+   end
+end

scripts/counter.lua

@@ -0,0 +1,14 @@
+-- example dynamic request script which demonstrates changing
+-- the request path and a header for each request
+-------------------------------------------------------------
+-- NOTE: each wrk thread has an independent Lua scripting
+-- context and thus there will be one counter per thread
+
+counter = 0
+
+request = function()
+   path = "/" .. counter
+   wrk.headers["X-Counter"] = counter
+   counter = counter + 1
+   return wrk.format(nil, path)
+end

scripts/post.lua

@@ -0,0 +1,6 @@
+-- example HTTP POST script which demonstrates setting the
+-- HTTP method, body, and adding a header
+
+wrk.method = "POST"
+wrk.body   = "foo=bar&baz=quux"
+wrk.headers["Content-Type"] = "application/x-www-form-urlencoded"

scripts/report.lua

@@ -0,0 +1,10 @@
+-- example reporting script which demonstrates a custom
+-- done() function that prints latency percentiles as CSV
+
+done = function(summary, latency, requests)
+   io.write("------------------------------\n")
+   for _, p in pairs({ 50, 90, 99, 99.999 }) do
+      n = latency:percentile(p)
+      io.write(string.format("%g%%,%d\n", p, n))
+   end
+end