[WIP] Partial bot skeleton, non-functional though

vendor/github.com/NicoNex/echotron/v3/network.go

@@ -0,0 +1,118 @@
+/*
+ * Echotron
+ * Copyright (C) 2018-2022 The Echotron Devs
+ *
+ * Echotron is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Echotron is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package echotron
+
+import (
+	"bytes"
+	"io"
+	"mime/multipart"
+	"net/http"
+	"net/url"
+	"path/filepath"
+	"strings"
+)
+
+// content is a struct which contains a file's name, its type and its data.
+type content struct {
+	fname string
+	ftype string
+	fdata []byte
+}
+
+// sendGetRequest is used to send an HTTP GET request.
+func sendGetRequest(url string) ([]byte, error) {
+	resp, err := http.Get(url)
+	if err != nil {
+		return []byte{}, err
+	}
+	defer resp.Body.Close()
+
+	data, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return []byte{}, err
+	}
+
+	return data, nil
+}
+
+// sendPostRequest is used to send an HTTP POST request.
+func sendPostRequest(url string, files ...content) ([]byte, error) {
+	var buf = new(bytes.Buffer)
+	var w = multipart.NewWriter(buf)
+
+	for _, f := range files {
+		part, err := w.CreateFormFile(f.ftype, filepath.Base(f.fname))
+		if err != nil {
+			return []byte{}, err
+		}
+		part.Write(f.fdata)
+	}
+
+	w.Close()
+
+	req, err := http.NewRequest("POST", url, buf)
+	if err != nil {
+		return []byte{}, err
+	}
+	req.Header.Add("Content-Type", w.FormDataContentType())
+
+	var client = new(http.Client)
+	res, err := client.Do(req)
+	if err != nil {
+		return []byte{}, err
+	}
+	defer res.Body.Close()
+
+	cnt, err := io.ReadAll(res.Body)
+	if err != nil {
+		return []byte{}, err
+	}
+	return cnt, nil
+}
+
+// sendPostForm is used to send an "application/x-www-form-urlencoded" through an HTTP POST request.
+func sendPostForm(reqURL string, keyVals map[string]string) ([]byte, error) {
+	var form = make(url.Values)
+
+	for k, v := range keyVals {
+		form.Add(k, v)
+	}
+
+	request, err := http.NewRequest("POST", reqURL, strings.NewReader(form.Encode()))
+	if err != nil {
+		return []byte{}, err
+	}
+	request.PostForm = form
+	request.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+
+	var client http.Client
+
+	response, err := client.Do(request)
+	if err != nil {
+		return []byte{}, err
+	}
+	defer response.Body.Close()
+
+	content, err := io.ReadAll(response.Body)
+	if err != nil {
+		return []byte{}, err
+	}
+
+	return content, nil
+}