小程序上传文件至云存储的实现

// 获取access_token
function getAccessToken(){
    // APPID和SECRET均可在小程序后台获取
    $appid = 'APPID';
    $secret = 'SECRET';
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=". 
$appid ."&secret=". $secret;
    $res = curl_get($url);  // 使用GET方式请求微信接口
    $res = JSON_decode($res,1);
    return $res['access_token'];
}

// 上传文件到小程序云存储
function upload(){
    $path = $_REQUEST['path'];
    $url = "https://api.weixin.qq.com/tcb/uploadfile?access_token=". getAccessToken();
    $data = array ('path' => $path,'env' => APP_CLOUD_ID);  // APP_CLOUD_ID是你小程序的云环境ID
    $res = json_decode(request($url, $data),1);
    $fileName = $_FILES['file']['tmp_name'];
    $handle = fopen($fileName,"r");
    $file = fread($handle,filesize($fileName));
    curl_post(
        $res['url'], 
        array (
            'key' => $path,
            'Signature' => $res['authorization'],
            'x-cos-security-token' => $res['token'],
            'x-cos-meta-fileid' => $res['cos_file_id'],
            'file' => $file,
        )
    );
    echo json_encode(array(
        'code' => 200,
        'msg' => '文件上传成功',
        'data' => $res['file_id']
    ));
}

// get请求
function curl_get($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    return curl_exec($ch);
    curl_close($ch);
}

// post请求
function curl_post($url, $data){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    return curl_exec($ch);
    curl_close($ch);
}

// VueJS
<template>
  <el-upload
      class="avatar-uploader"
      :action=""
      accept="image/*,.jpg"
      :http-request="upload"
      :show-file-list="false"
  >
    <img v-if="image" :src="image" class="avatar" />
    <i v-else class="el-icon-plus avatar-uploader-icon"></i>
  </el-upload>
</template>

<script>
import axiOS from 'axios'
const request = axios.create({
  baseURL: process.env.BASE_API, // api 的 base_url
  timeout: 20000
});

export default {
  data() {
    return {
      image: ''
    };
  },
  methods: {
    async upload(e) {
      let fORMData = new FormData();
      let path = `upload/${new Date().getTime() + e.file.name.match(/\.(.*)/)[0]}`;
      formData.append("path", path);
      formData.append("file", e.file);
      await request({
        url: '/api/upload',  // php提供的上传接口
        method: 'post',
        headers: {
            "Content-Type": "multipart/form-data",//设置headers
        },
        data: formData
      });
      this.image = '【小程序云存储域名】' + path;
    }
};
</script>