Enable outputting to a URL if one is provided (#71)

* use a url if it is provided

* remove extra printlns

* support bundle yay

* remove extraneous println

* update changelog

CHANGELOG

@@ -34,3 +34,6 @@
 
 0.9.0 / 2017-11-22
     * Kubernetes support
+
+0.9.1 / 2017-12-01
+    * Support output to a URL. This will do a form post to the provided callback URL.

pkg/bundle/generate.go

@@ -1,9 +1,14 @@
 package bundle
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
+	"io"
 	"io/ioutil"
+	"mime/multipart"
+	"net/http"
+	"net/url"
 	"os"
 	"path/filepath"
 	"time"
@@ -16,6 +21,14 @@ import (
 
 // Generate a new support bundle and write the results as an archive at pathname
 func Generate(tasks []types.Task, timeout time.Duration, pathname string) error {
+	var isURL bool
+
+	callbackURL, err := url.Parse(pathname)
+	if err == nil && (callbackURL.Scheme == "http" || callbackURL.Scheme == "https") {
+		isURL = true
+		pathname = "/tmp/bundle.tar.gz"
+	}
+
 	collectDir, err := ioutil.TempDir(filepath.Dir(pathname), "")
 	if err != nil {
 		return errors.Wrap(err, "Creating a temporary directory to store results failed")
@@ -57,9 +70,44 @@ func Generate(tasks []types.Task, timeout time.Duration, pathname string) error
 	comp := compressor.NewTgz()
 	comp.SetTarConfig(compressor.Tar{TruncateLongFiles: true})
 	// trailing slash keeps the parent directory from being included in archive
+
 	if err := comp.Compress(collectDir+"/", pathname); err != nil {
 		return errors.Wrap(err, "Compressing results directory failed")
 	}
 
+	if isURL {
+		var b bytes.Buffer
+		w := multipart.NewWriter(&b)
+
+		file, err := os.Open(pathname)
+		if err != nil {
+			return errors.Wrap(err, "finding the file that was just compressed")
+		}
+		defer file.Close()
+		fw, err := w.CreateFormFile("file", pathname)
+		if err != nil {
+			return errors.Wrap(err, "creating multipart form")
+		}
+
+		if _, err = io.Copy(fw, file); err != nil {
+			return errors.Wrap(err, "copying buffer")
+		}
+
+		w.Close()
+
+		req, err := http.NewRequest("POST", callbackURL.String(), &b)
+		if err != nil {
+			return errors.Wrap(err, "making request")
+		}
+
+		req.Header.Set("Content-Type", w.FormDataContentType())
+
+		client := &http.Client{}
+		_, err = client.Do(req)
+		if err != nil {
+			return errors.Wrap(err, "completing request")
+		}
+	}
+
 	return nil
 }