httphead.go
Tiny HTTP header value parsing library in go.
Overview
This library contains low-level functions for scanning HTTP RFC2616 compatible header value grammars.
Install
go get github.com/gobwas/httpheadExample
The example below shows how multiple-choise HTTP header value could be parsed with this library:
options, ok := httphead.ParseOptions([]byte(`foo;bar=1,baz`), nil)
fmt.Println(options, ok)
// Output: [{foo map[bar:1]} {baz map[]}] trueThe low-level example below shows how to optimize keys skipping and selection of some key:
// The right part of full header line like:
// X-My-Header: key;foo=bar;baz,key;baz
header := []byte(`foo;a=0,foo;a=1,foo;a=2,foo;a=3`)
// We want to search key "foo" with an "a" parameter that equal to "2".
var (
foo = []byte(`foo`)
a = []byte(`a`)
v = []byte(`2`)
)
var found bool
httphead.ScanOptions(header, func(i int, key, param, value []byte) Control {
if !bytes.Equal(key, foo) {
return ControlSkip
}
if !bytes.Equal(param, a) {
if bytes.Equal(value, v) {
// Found it!
found = true
return ControlBreak
}
return ControlSkip
}
return ControlContinue
})For more usage examples please see docs or package tests.