diff --git a/file_util.go b/file_util.go
index 6423148..a560afa 100644
--- a/file_util.go
+++ b/file_util.go
@@ -63,3 +63,6 @@ func InsertLine(lines *[]string, pos int64, l string) {
 	*lines = append((*lines)[:pos], tail...)
 }
 
+func WriteFile(path string, content []byte) error {
+	return ioutil.WriteFile(path, content, 0644) // drw-r--r--
+}
diff --git a/json.go b/json.go
index 8997bab..00eec31 100644
--- a/json.go
+++ b/json.go
@@ -6,10 +6,52 @@ import (
 	"bytes"
 	"encoding/json"
 	"io"
+	"io/ioutil"
 	"net/http"
 	"net/url"
 )
 
+func GetContent(url string, params url.Values, headers http.Header) (content []byte, status int, err error) {
+	if params != nil {
+		p := params.Encode()
+		if p != "" {
+			url += "?" + p
+		}
+	}
+
+	req, err := http.NewRequest(http.MethodGet, url, nil)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	if headers != nil {
+		for k, head := range headers {
+			for i, h := range head {
+				if i == 0 {
+					req.Header.Set(k, h)
+				} else {
+					req.Header.Add(k, h)
+				}
+			}
+		}
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, 0, err
+	}
+	defer resp.Body.Close()
+	status = resp.StatusCode
+
+	if status != http.StatusOK {
+		return nil, status, err
+	}
+
+	content, err = ioutil.ReadAll(resp.Body)
+
+	return content, status, err
+}
+
 // DecodeJSON decodes JSON data from r to v.
 // Returns an error if it fails.
 func DecodeJSON(r io.Reader, v interface{}) error {
@@ -17,9 +59,11 @@ func DecodeJSON(r io.Reader, v interface{}) error {
 }
 
 func GetJSON(url string, v interface{}, params url.Values, headers http.Header) (status int, err error) {
-	p := params.Encode()
-	if p != "" {
-		url += "?" + p
+	if params != nil {
+		p := params.Encode()
+		if p != "" {
+			url += "?" + p
+		}
 	}
 
 	req, err := http.NewRequest(http.MethodGet, url, nil)
@@ -61,9 +105,11 @@ func PostJSON(url string, v, r interface{}, params url.Values, headers http.Head
 	buffer := bytes.NewBuffer(make([]byte, 0))
 	json.NewEncoder(buffer).Encode(v)
 
-	p := params.Encode()
-	if p != "" {
-		url += "?" + p
+	if params != nil {
+		p := params.Encode()
+		if p != "" {
+			url += "?" + p
+		}
 	}
 
 	req, err := http.NewRequest(http.MethodPost, url, buffer)