testing compilation with remove package

go/operation/upload_content.go

@@ -0,0 +1,47 @@
+package operation
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	_ "fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"mime/multipart"
+	"net/http"
+)
+
+type UploadResult struct {
+	Size  int
+	Error string
+}
+
+func Upload(uploadUrl string, filename string, reader io.Reader) (*UploadResult, error) {
+	body_buf := bytes.NewBufferString("")
+	body_writer := multipart.NewWriter(body_buf)
+	file_writer, err := body_writer.CreateFormFile("file", filename)
+	io.Copy(file_writer, reader)
+	content_type := body_writer.FormDataContentType()
+	body_writer.Close()
+	resp, err := http.Post(uploadUrl, content_type, body_buf)
+	if err != nil {
+		log.Println("failing to upload to", uploadUrl)
+		return nil, err
+	}
+	defer resp.Body.Close()
+	resp_body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	var ret UploadResult
+	err = json.Unmarshal(resp_body, &ret)
+	if err != nil {
+		log.Println("failing to read upload resonse", uploadUrl, resp_body)
+		return nil, err
+	}
+	if ret.Error != "" {
+		return nil, errors.New(ret.Error)
+	}
+	return &ret, nil
+}