bench-httpd

A tiny Go-based httpd server suitable for calibrating benchmarks and some networking testing.

When accessed over HTTP, it generates a response based on the supplied query parameters:

first - Count of bytes to send before any sleep
sleep - Sleep in milliseconds
size  - Count of bytes to send after sleep
count - Count of sleep+send cycles

All values are assumed to be 0 if not set. If either sleep or size are greater than 0, count is set to at least 1.

Which are used according to the following pseudo-code:

• Write first random bytes
• Loop count times, each loop doing:
  • Delay for sleep milliseconds
  • Write size random bytes

For example, accessing http://localhost/?first=1000&sleep=250&size=128&count=5 will write 1000 random bytes, and loop 5 times that each: sleep 250ms and write 128 bytes.

Building

Install and set up Go 1.7 or later. If you haven't used Go before (assuming you are on a Mac):

brew install go
mkdir -p $HOME/go/src
export GOPATH=$HOME/go

Then to fetch the code and its dependencies and build the binary:

go get -u -t github.com/die-net/bench-httpd

The binary is now available as: $HOME/go/bin/bench-httpd

Usage

$HOME/go/bin/bench-httpd [flags]

Where [flags] are any of:

-cache-control string
    The Cache-Control header to return for all responses. (default "private,no-cache,max-age=0")
-content-type string
    The Content-Type to return for all responses. (default "text/plain")
-enable-https
    Enabling listening on port 443 for HTTPS connections and fetching of Let's Encrypt certificates
-hostnames string
    A comma-separated whitelist of hostnames to try asking Let's Encrypt for a TLS cert (unset = any)
-listen string
    [IP]:port to listen for HTTP connections. (default ":80")

The -enable-https flag will attempt to get a new TLS certificate from Let's Encrypt for any hostname that it is accessed as. This will only work for servers that are publicly reachable on port 443, because the Let's Encrypt validation will connect there before issuing the certificate. If the -hostnames flag is set, only the listed hostnames are attempted, and TLS connections for all other hostnames are rejected.