refactor(config): localize config used like a global variable (#1179)

* refactor(report): LocalFileWriter

* refactor -format-json

* refacotr: -format-one-email

* refactor: -format-csv

* refactor: -gzip

* refactor: -format-full-text

* refactor: -format-one-line-text

* refactor: -format-list

* refacotr: remove -to-* from config

* refactor: IgnoreGitHubDismissed

* refactor: GitHub

* refactor: IgnoreUnsocred

* refactor: diff

* refacotr: lang

* refacotr: cacheDBPath

* refactor: Remove config references

* refactor: ScanResults

* refacotr: constant pkg

* chore: comment

* refactor: scanner

* refactor: scanner

* refactor: serverapi.go

* refactor: serverapi

* refactor: change pkg structure

* refactor: serverapi.go

* chore: remove emtpy file

* fix(scan): remove -ssh-native-insecure option

* fix(scan): remove the deprecated option `keypassword`

reporter/http.go

@@ -0,0 +1,46 @@
+package reporter
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+
+	c "github.com/future-architect/vuls/config"
+	"github.com/future-architect/vuls/models"
+	"golang.org/x/xerrors"
+)
+
+// HTTPRequestWriter writes results to HTTP request
+type HTTPRequestWriter struct{}
+
+// Write sends results as HTTP response
+func (w HTTPRequestWriter) Write(rs ...models.ScanResult) (err error) {
+	for _, r := range rs {
+		b := new(bytes.Buffer)
+		if err := json.NewEncoder(b).Encode(r); err != nil {
+			return err
+		}
+		_, err = http.Post(c.Conf.HTTP.URL, "application/json; charset=utf-8", b)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// HTTPResponseWriter writes results to HTTP response
+type HTTPResponseWriter struct {
+	Writer http.ResponseWriter
+}
+
+// Write sends results as HTTP response
+func (w HTTPResponseWriter) Write(rs ...models.ScanResult) (err error) {
+	res, err := json.Marshal(rs)
+	if err != nil {
+		return xerrors.Errorf("Failed to marshal scan results: %w", err)
+	}
+	w.Writer.Header().Set("Content-Type", "application/json")
+	_, err = w.Writer.Write(res)
+
+	return err
+}