From 679a62a9407c09be0cfb4e22455dca5ae694ce01 Mon Sep 17 00:00:00 2001
From: Ben Burwell <ben@benburwell.com>
Date: Mon, 16 Sep 2019 15:56:31 -0400
Subject: Flesh out

---
 client/client.go      | 43 +++++++++++++++++++++++++++++++++
 client/client_test.go | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 109 insertions(+)
 create mode 100644 client/client.go
 create mode 100644 client/client_test.go

(limited to 'client')

diff --git a/client/client.go b/client/client.go
new file mode 100644
index 0000000..e39a6a1
--- /dev/null
+++ b/client/client.go
@@ -0,0 +1,43 @@
+package client
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+	"sync"
+	"time"
+)
+
+type CaesarClient struct {
+	Endpoint string
+	Token    string
+
+	c    *http.Client
+	once sync.Once
+}
+
+func (c *CaesarClient) EncodeMessage(r io.Reader) (io.Reader, error) {
+	c.once.Do(func() {
+		c.c = &http.Client{Timeout: 10 * time.Second}
+	})
+	req, err := http.NewRequest("POST", c.Endpoint, r)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("authorization", "token "+c.Token)
+	req.Header.Set("user-agent", "caesar-client/1.0")
+	resp, err := c.c.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("http status %s", resp.Status)
+	}
+	var body bytes.Buffer
+	defer resp.Body.Close()
+	if _, err := io.Copy(&body, resp.Body); err != nil {
+		return nil, err
+	}
+	return &body, nil
+}
diff --git a/client/client_test.go b/client/client_test.go
new file mode 100644
index 0000000..fb1701c
--- /dev/null
+++ b/client/client_test.go
@@ -0,0 +1,66 @@
+package client
+
+import (
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestBadAuth(t *testing.T) {
+	var hf http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
+		if r.Header.Get("authorization") != "token TEST-TOKEN" {
+			w.WriteHeader(http.StatusUnauthorized)
+			return
+		}
+		w.Write([]byte("encoded yay"))
+	}
+	tests := []struct {
+		name       string
+		tok        string
+		expectErr  bool
+		expectBody bool
+	}{
+		{"valid token", "TEST-TOKEN", false, true},
+		{"empty token", "", true, false},
+		{"invalid token", "bad token", true, false},
+	}
+	server := httptest.NewServer(hf)
+	defer server.Close()
+	c := CaesarClient{Endpoint: server.URL}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r, err := c.EncodeMessage(strings.NewReader("secret message"))
+			if err == nil {
+				t.Errorf("should have gotten error")
+			}
+			if r != nil {
+				t.Errorf("should not have gotten a reader")
+			}
+		})
+	}
+}
+
+func TestEncode(t *testing.T) {
+	var hf http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("response"))
+	}
+	server := httptest.NewServer(hf)
+	defer server.Close()
+	c := CaesarClient{Endpoint: server.URL}
+	r, err := c.EncodeMessage(strings.NewReader("secret message"))
+	if err != nil {
+		t.Errorf("should not have gotten error: %v", err)
+	}
+	if r == nil {
+		t.Errorf("should have gotten a reader")
+	}
+	resp, err := ioutil.ReadAll(r)
+	if err != nil {
+		t.Fatalf("could not read message: %v", err)
+	}
+	if string(resp) != "response" {
+		t.Errorf("expected 'response' but got '%s'", resp)
+	}
+}
-- 
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