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upload.go
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// Copyright 2021 FastWeGo
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"bytes"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"log"
"mime/multipart"
"net/http"
"net/url"
"os"
"github.com/fastwego/feishu"
"github.com/gin-gonic/gin"
)
func Upload(c *gin.Context) {
path := "hi.jpg"
file, err := os.Open(path)
if err != nil {
return
}
defer file.Close()
body := &bytes.Buffer{}
writer := multipart.NewWriter(body)
part, err := writer.CreateFormFile("image", path)
if err != nil {
return
}
_, err = io.Copy(part, file)
_ = writer.WriteField("image_type", "message")
err = writer.Close()
if err != nil {
return
}
request, _ := http.NewRequest(http.MethodPost, feishu.ServerUrl+"/open-apis/image/v4/put/", body)
request.Header.Set("Content-Type", writer.FormDataContentType())
tenantAccessToken, err := Atm.GetAccessToken()
if err != nil {
log.Println(err)
return
}
resp, err := FeishuClient.Do(request, tenantAccessToken)
fmt.Println(string(resp), err)
if err != nil {
return
}
image := struct {
Code int `json:"code"`
Msg string `json:"msg"`
Data struct {
ImageKey string `json:"image_key"`
} `json:"data"`
}{}
err = json.Unmarshal(resp, &image)
if err != nil {
return
}
params := url.Values{}
params.Add("image_key", image.Data.ImageKey)
request, err = http.NewRequest(http.MethodGet, feishu.ServerUrl+"/open-apis/image/v4/get?"+params.Encode(), nil)
resp, err = FeishuClient.Do(request, tenantAccessToken)
fmt.Println(string(resp), err)
if err != nil {
fmt.Println(err)
return
}
encoded := base64.StdEncoding.EncodeToString(resp)
html := `<!DOCTYPE html>
<html>
<head>
<title>Display Image</title>
</head>
<body>
<img style='display:block;' id='base64image'
src='data:image/jpeg;base64, ` + encoded + `' />
</body>
</html>`
fmt.Println(html)
_, _ = c.Writer.WriteString(html)
}