upload image and download it back from wechat server

download.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"time"
+)
+
+func saveURL(url string) (tmpFile string, contentType string, err error) {
+	var myClient = &http.Client{Timeout: 20 * time.Second}
+	r, err := myClient.Get(url)
+	if err != nil {
+		log.Fatal("Fail to get URL:" + url)
+		log.Fatal(err)
+		return "", "", err
+	}
+	defer r.Body.Close()
+	file, err := ioutil.TempFile(os.TempDir(), "prefix")
+	// Use io.Copy to just dump the response body to the file. This supports huge files
+	_, err = io.Copy(file, r.Body)
+	if err != nil {
+		log.Fatal(err)
+	}
+	tmpFile = file.Name()
+	file.Close()
+	return
+}

upload_test.go

@@ -2,11 +2,29 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/udhos/equalfile"
 )
 
 func TestUploadImage(t *testing.T) {
 	SetupConfig()
-	mediaID := uploadImage("media_for_test/640x480.jpg")
+	src := "media_for_test/640x480.jpg"
+	mediaID := uploadImage(src)
 	fmt.Printf("get MediaID: %s ", mediaID)
+	//200 OK
+	//{"type":"image","media_id":"3wx8MSvsBYDubAqNi_QZSzNyCrOQ4eoOPslXzpOm6Kzv2Sfh2RngUFlDLfxcSdG2","created_at":1494140549}
+	//mediaID = "3wx8MSvsBYDubAqNi_QZSzNyCrOQ4eoOPslXzpOm6Kzv2Sfh2RngUFlDLfxcSdG2"
+	//mediaID = "L2Cyf6F5GvVXpubv75Pnf51f-Z7Ah5fOROqt1qsZTLmrebtOmeQy9Co2xw7JI6ck"
+	assert.NotEqual(t, mediaID, "", "MediaID should not be Empty")
+	filename, e := saveMedia2File(mediaID)
+	log.Println("saved :" + filename)
+	AssertEqual(t, e, nil, "mediaID should be saved without any error")
+	//make sure two files are the same
+	cmp := equalfile.New(nil, equalfile.Options{}) // compare using single mode
+	equal, err := cmp.CompareFile(src, filename)
+	AssertEqual(t, err, nil, "file should be equal ")
+	AssertEqual(t, equal, true, "file should be equal ")
 }

wechat_hitxy_access_token

@@ -1 +1 @@
-{"access_token":"-6lyvdFk4jKGE1H0UZBPAzHXz793OXyuXmbjqtdWC0TXFY8KmSUwcL_2dRYYi6k0kp2HwMukFVTKnd1PvfoZrrAjM6dXegRGf1wKQpvobx7C-Zdf-1REcM_BvO9GBJkgQNKeAGAAXU","expires_in":7200,"created_at":"2017-05-07T17:02:29.012072846+10:00"}
+{"access_token":"VkqKPaCmYeSLh5p4-0AA7pew_ncB7YY-u5P4S-hc2T8V1KQiRoSsXwjvh4QVb4_eZqEaG_gdrL0e-o9Lz3ajV3HzqftUdzMhi_K7gr0ueguf4MQLFGfahofD7VFoSf98LXVbAHABNL","expires_in":7200,"created_at":"2017-05-07T20:32:46.746644722+10:00"}