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Add request placeholder support for querying request cookies. (#1392)

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* Add request placeholder support for querying request cookies.

This adds the ability to query the request cookies for placeholders
using the syntax "@cookiename".

For example, this would allow rewriting based on a cookie:
  rewrite {
    if @version is 'dev'
    to /dev/index.html
  }

* Switch cookie special char from @ to :

* Switch special char for cookies from : to ~
This commit is contained in:
Augusto Roman 2017-02-15 21:59:24 -07:00 committed by Matt Holt
parent bdb61f4a1d
commit dc3efc939c
2 changed files with 14 additions and 1 deletions
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7
caddyhttp/httpserver/replacer.go
View File

@ -198,6 +198,13 @@ func (r *replacer) getSubstitution(key string) string {
}
}
}
// next check for cookies
if key[1] == '~' {
name := key[2 : len(key)-1]
if cookie, err := r.request.Cookie(name); err == nil {
return cookie.Value
}
}
// search default replacements in the end
switch key {

8
caddyhttp/httpserver/replacer_test.go
View File

@ -47,6 +47,7 @@ func TestReplace(t *testing.T) {
repl := NewReplacer(request, recordRequest, "-")
// add some headers after creating replacer
request.Header.Set("CustomAdd", "caddy")
request.Header.Set("Cookie", "foo=bar; taste=delicious")
hostname, err := os.Hostname()
if err != nil {
@ -72,12 +73,17 @@ func TestReplace(t *testing.T) {
{"{when_iso}", "2006-01-02T15:04:12Z"},
{"The Custom header is {>Custom}.", "The Custom header is foobarbaz."},
{"The CustomAdd header is {>CustomAdd}.", "The CustomAdd header is caddy."},
{"The request is {request}.", "The request is POST / HTTP/1.1\\r\\nHost: localhost\\r\\nCustom: foobarbaz\\r\\nCustomadd: caddy\\r\\nShorterval: 1\\r\\n\\r\\n."},
{"The request is {request}.", "The request is POST / HTTP/1.1\\r\\nHost: localhost\\r\\n" +
"Cookie: foo=bar; taste=delicious\\r\\nCustom: foobarbaz\\r\\nCustomadd: caddy\\r\\n" +
"Shorterval: 1\\r\\n\\r\\n."},
{"The cUsToM header is {>cUsToM}...", "The cUsToM header is foobarbaz..."},
{"The Non-Existent header is {>Non-Existent}.", "The Non-Existent header is -."},
{"Bad {host placeholder...", "Bad {host placeholder..."},
{"Bad {>Custom placeholder", "Bad {>Custom placeholder"},
{"Bad {>Custom placeholder {>ShorterVal}", "Bad -"},
{"Bad {}", "Bad -"},
{"Cookies are {~taste}", "Cookies are delicious"},
{"Missing cookie is {~missing}", "Missing cookie is -"},
}
for _, c := range testCases {