DownloadTask.onHeadersReceived

    示例

    代码示例

    • SWAN
    • JS
    2.     onHeadersReceived() {      
    3.         let downloadTask = swan.downloadFile({
    4.             url: 'https://b.bdstatic.com/miniapp/assets/docs/sprddemofile-sample.pdf',
    5.                 'content-type': 'application/json'
    6.             },
    7.             success: () => {
    9.             },
    10.             fail: () => {
    11.                 console.log('downloadFile fail');
    12.             },
    13.             complete: () => {
    14.                 console.log('downloadFile complete');
    16.         let cb = res => {
    17.             swan.showModal({
    18.                 title: 'onHeadersReceived',
    19.                 content: JSON.stringify(res)
    20.             });
    21.         };
    22.         downloadTask.onHeadersReceived(cb);
    24. });