Add basic API client (#19)

api/output_string.go

@@ -0,0 +1,71 @@
+package api
+
+import (
+	"fmt"
+	"strings"
+
+	retryablehttp "github.com/hashicorp/go-retryablehttp"
+)
+
+const (
+	ErrOutputStringRequest = "output a string, please"
+)
+
+var (
+	LastOutputStringError *OutputStringError
+)
+
+type OutputStringError struct {
+	*retryablehttp.Request
+	parsingError     error
+	parsedCurlString string
+}
+
+func (d *OutputStringError) Error() string {
+	if d.parsedCurlString == "" {
+		d.parseRequest()
+		if d.parsingError != nil {
+			return d.parsingError.Error()
+		}
+	}
+
+	return ErrOutputStringRequest
+}
+
+func (d *OutputStringError) parseRequest() {
+	body, err := d.Request.BodyBytes()
+	if err != nil {
+		d.parsingError = err
+		return
+	}
+
+	// Build cURL string
+	d.parsedCurlString = "curl "
+	if d.Request.Method != "GET" {
+		d.parsedCurlString = fmt.Sprintf("%s-X %s ", d.parsedCurlString, d.Request.Method)
+	}
+	for k, v := range d.Request.Header {
+		for _, h := range v {
+			if strings.ToLower(k) == "authorization" {
+				h = `Bearer: <token>`
+			}
+			d.parsedCurlString = fmt.Sprintf("%s-H \"%s: %s\" ", d.parsedCurlString, k, h)
+		}
+	}
+
+	if len(body) > 0 {
+		// We need to escape single quotes since that's what we're using to
+		// quote the body
+		escapedBody := strings.Replace(string(body), "'", "'\"'\"'", -1)
+		d.parsedCurlString = fmt.Sprintf("%s-d '%s' ", d.parsedCurlString, escapedBody)
+	}
+
+	d.parsedCurlString = fmt.Sprintf("%s%s", d.parsedCurlString, d.Request.URL.String())
+}
+
+func (d *OutputStringError) CurlString() string {
+	if d.parsedCurlString == "" {
+		d.parseRequest()
+	}
+	return d.parsedCurlString
+}