HTTP

A HTTP event source activates your component when a request is received by maelstromd on the public HTTP port with a Host header that matches the hostname and pathprefix value.

Fields#

Rule sorting#

Rules are sorted from most to least specific. Rules without hostnames sort below all rules with hostnames. Rules with hostnames and paths sort above rules with only hostnames. Rules with both hostname and path are sorted by path length (longest first). Here’s an example of a sorted list of rules.

hostname     path
------------------------
foo.com      /aaaa
bar.com      /aaa
bar.com      /aa
foo.com      /a
foo.com
bar.com
             /aaaa
             /aaa
             /a

Examples#

Example 1: Match all requests to hello.example.org

components:
  mywebapp:
    image: coopernurse/go-hello-http
    eventsources:
      # "myhttp_source" is the name of the event source
      # this name must be unique within a project yaml file
      myhttp_source:
        # http field indicates this is a HTTP event source
        http:
          # Either hostname or pathprefix must be provided
          # if both are provided, then request must match both
          hostname: hello.example.org

Example 2: Match all requests to hello.example.org/foo/

This doesn’t strip the prefix, so requests to: http://hello.example.org/foo/ goes to http://x.y.z:port/foo/

components:
  mywebapp:
    image: coopernurse/go-hello-http
    eventsources:
      myhttp_source:
        http:
          hostname: hello.example.org
          pathprefix: /foo/

Example 3: Same as 2 but strip prefix

http://hello.example.org/foo/ goes to http://x.y.z:port/

components:
  mywebapp:
    image: coopernurse/go-hello-http
    eventsources:
      myhttp_source:
        http:
          hostname: hello.example.org
          pathprefix: /foo/
          stripprefix: true

Example 4: Match all requests to /someapi

Be careful with this as it will match any hostname.

components:
  mywebapp:
    image: coopernurse/go-hello-http
    eventsources:
      myhttp_source:
        http:
          pathprefix: /someapi