Json AngularJS $httppost 将二进制文件转换为 excel 文件并下载

Just noticed you can't use it because of IE8/9 but I'll push submit anyway... maybe someone finds it useful

这实际上可以通过浏览器来完成，使用blob.注意responseType和successpromise 中的代码.

$http({
    url: 'your/webservice',
    method: "POST",
    data: json, //this is your json data string
    headers: {
       'Content-type': 'application/json'
    },
    responseType: 'arraybuffer'
}).success(function (data, status, headers, config) {
    var blob = new Blob([data], {type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"});
    var objectUrl = URL.createObjectURL(blob);
    window.open(objectUrl);
}).error(function (data, status, headers, config) {
    //upload failed
});

不过，它也存在一些问题，比如:

1. 它不支持IE 8 and 9:
2. It opens a pop up window to open the objectUrl which people might have blocked
3. 生成奇怪的文件名

It did work!

$file = "file.xlsx";
header('Content-disposition: attachment; filename='.$file);
header('Content-Length: ' . filesize($file));
header('Content-Transfer-Encoding: binary');
header('Cache-Control: must-revalidate');
header('Pragma: public');
echo json_encode(readfile($file));

Edit 20.04.2016

Browsers are making it harder to save data this way. One good option is to use filesaver.js. It provides a cross browser implementation for saveAs, and it should replace some of the code in the success promise above.