From 190db9cc739a8a6f4a6d0367f402ea47ee128b6a Mon Sep 17 00:00:00 2001
From: Ian Gulliver <github@flamingcow.io>
Date: Thu, 20 Apr 2023 16:32:17 +0000
Subject: [PATCH] Initial commit

---
 .gitignore            |  2 ++
 authorization.go      | 38 ++++++++++++++++++++++++++++++++++++++
 authorization_test.go | 39 +++++++++++++++++++++++++++++++++++++++
 go.mod                | 16 ++++++++++++++++
 go.sum                | 27 +++++++++++++++++++++++++++
 justfile              | 18 ++++++++++++++++++
 6 files changed, 140 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 authorization.go
 create mode 100644 authorization_test.go
 create mode 100644 go.mod
 create mode 100644 go.sum
 create mode 100644 justfile

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6754c7d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+cover.out
+cover.html
diff --git a/authorization.go b/authorization.go
new file mode 100644
index 0000000..c4f321b
--- /dev/null
+++ b/authorization.go
@@ -0,0 +1,38 @@
+package header
+
+import (
+	"encoding/base64"
+	"net/http"
+	"strings"
+
+	"github.com/gopatchy/jsrest"
+)
+
+func ParseAuthorization(r *http.Request) (string, string) {
+	auth := r.Header.Get("Authorization")
+
+	if auth == "" {
+		return "", ""
+	}
+
+	parts := strings.Split(auth, " ")
+	if len(parts) != 2 {
+		return "", ""
+	}
+
+	return parts[0], parts[1]
+}
+
+func ParseBasic(val string) (string, string, error) {
+	raw, err := base64.StdEncoding.DecodeString(val)
+	if err != nil {
+		return "", "", jsrest.Errorf(jsrest.ErrBadRequest, "Authorization header Basic data base64 decode failed (%w)", err)
+	}
+
+	parts := strings.SplitN(string(raw), ":", 2)
+	if len(parts) != 2 {
+		return "", "", jsrest.Errorf(jsrest.ErrBadRequest, "Authorization header Basic data malformed")
+	}
+
+	return parts[0], parts[1], nil
+}
diff --git a/authorization_test.go b/authorization_test.go
new file mode 100644
index 0000000..bb361bf
--- /dev/null
+++ b/authorization_test.go
@@ -0,0 +1,39 @@
+package header_test
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/gopatchy/header"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseAuthorization(t *testing.T) {
+	t.Parallel()
+
+	req, err := http.NewRequest(http.MethodGet, "/foo", nil)
+	require.NoError(t, err)
+
+	req.Header.Add("Authorization", "Bearer xyz")
+
+	typ, val := header.ParseAuthorization(req)
+	require.Equal(t, "Bearer", typ)
+	require.Equal(t, "xyz", val)
+}
+
+func TestParseBasic(t *testing.T) {
+	t.Parallel()
+
+	req, err := http.NewRequest(http.MethodGet, "/foo", nil) //nolint:noctx
+	require.NoError(t, err)
+
+	req.Header.Add("Authorization", "Basic YWxhZGRpbjpvcGVuc2VzYW1l")
+
+	typ, val := header.ParseAuthorization(req)
+	require.Equal(t, "Basic", typ)
+
+	user, pass, err := header.ParseBasic(val)
+	require.NoError(t, err)
+	require.Equal(t, "aladdin", user)
+	require.Equal(t, "opensesame", pass)
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..a548c8f
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,16 @@
+module github.com/gopatchy/header
+
+go 1.19
+
+require (
+	github.com/gopatchy/jsrest v0.0.0-20230420161234-12a6d6da8b7f
+	github.com/stretchr/testify v1.8.2
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gopatchy/metadata v0.0.0-20230420053349-25837551c11d // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/vfaronov/httpheader v0.1.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..be7a5d1
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,27 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gopatchy/jsrest v0.0.0-20230420161234-12a6d6da8b7f h1:1uGPJm9K0Fro1UEcZpuK6FNPU/U1XX3aS3x0/PdFS40=
+github.com/gopatchy/jsrest v0.0.0-20230420161234-12a6d6da8b7f/go.mod h1:Ryi8LRBLFDhQsMQHuh+6VL7HcFWjBXOEiOy9Ip/Q+Ps=
+github.com/gopatchy/metadata v0.0.0-20230420053349-25837551c11d h1:chunoM47vkWSanIvLx4uRSkLMG6chDZOy09L2tt/bv8=
+github.com/gopatchy/metadata v0.0.0-20230420053349-25837551c11d/go.mod h1:VgD33raUShjDePCDBo55aj+eSXFtUEpMzs+Ie39g2zo=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rogpeppe/go-internal v1.8.1-0.20211023094830-115ce09fd6b4 h1:Ha8xCaq6ln1a+R91Km45Oq6lPXj2Mla6CRJYcuV2h1w=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/vfaronov/httpheader v0.1.0 h1:VdzetvOKRoQVHjSrXcIOwCV6JG5BCAW9rjbVbFPBmb0=
+github.com/vfaronov/httpheader v0.1.0/go.mod h1:ZBxgbYu6nbN5V9Ptd1yYUUan0voD0O8nZLXHyxLgoLE=
+go.uber.org/goleak v1.2.1 h1:NBol2c7O1ZokfZ0LEU9K6Whx/KnwvepVetCUhtKja4A=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..d607f93
--- /dev/null
+++ b/justfile
@@ -0,0 +1,18 @@
+go := env_var_or_default('GOCMD', 'go')
+
+default: tidy test
+
+tidy:
+	{{go}} mod tidy
+	goimports -l -w .
+	gofumpt -l -w .
+	{{go}} fmt ./...
+
+test:
+	{{go}} vet ./...
+	golangci-lint run ./...
+	{{go}} test -race -coverprofile=cover.out -timeout=60s -parallel=10 ./...
+	{{go}} tool cover -html=cover.out -o=cover.html
+
+todo:
+	-git grep -e TODO --and --not -e ignoretodo